Sony DVW-250 Maintenance Manual
  1. Manuals
  2. Brands
  3. Sony Manuals
  4. Measuring Instruments
  5. DVW-250
  6. Maintenance manual

Sony DVW-250 Maintenance Manual

Digital videocassette recorder
Hide thumbs Also See for DVW-250:
Table of Contents

Advertisement

Quick Links

Download this manual
DIGITAL VIDEOCASSETTE RECORDER
DVW-250/250P
MAINTENANCE MANUAL
Part 1
1st Edition (Revised 2)
Serial No. 10001 and Higher

Advertisement

Table of Contents
loading

Related Manuals for Sony DVW-250

Summary of Contents for Sony DVW-250

  • Page 1 DIGITAL VIDEOCASSETTE RECORDER DVW-250/250P MAINTENANCE MANUAL Part 1 1st Edition (Revised 2) Serial No. 10001 and Higher...
  • Page 2 ! WARNING This manual is intended for qualified service personnel only. To reduce the risk of electric shock, fire or injury, do not perform any servicing other than that contained in the operating instructions unless you are qualified to do so. Refer all servicing to qualified service personnel.

  • Page 3: Table Of Contents

    1-13-1. Tracking Adjustment ..............1-25 1-13-2. Audio Meter Contrast Adjustment ........... 1-25 1-14. Optional Accessories ................. 1-25 1-14-1. Optional Accessories ..............1-25 1-14-2. Fixture ..................1-26 1-14-3. Measuring Equipment .............. 1-29 2. Error Messages 2-1. Error Message ..................... 2-1 DVW-250/250P...
  • Page 4 Periodic Check .................... 5-6 5-2-1. Hours Meter ................5-6 5-2-2. Periodic Check List ..............5-6 DVW-250/250P Periodic Replacement List ......5-7 5-3. Cares after Using at Special Environment ..........5-8 6. Replacement of Mechanical Parts 6-1. General Information for Mechanical Part Replacement ......6-1 6-1-1.
  • Page 5 7-2-16. CTL Head Position Check ............7-39 7-2-17. DIP Switch Re-setting .............. 7-41 7-2-18. Self REC/PB Tracking Check ..........7-42 7-2-19. Tape Running Check ..............7-45 7-2-20. Locking Compound Applying..........7-50 7-3. Mechanical Alignment ................7-51 7-3-1. Tension Regurator Adjustment ..........7-51 DVW-250/250P...
  • Page 6 RF System Adjustment ................9-14 9-5-1. RF Parameter Initialize ............9-16 9-5-2. Transversal Filter Adjustment ..........9-16 9-5-3. PLL Adjustment ............... 9-17 9-5-4. Phase Adjustment ..............9-18 9-5-5. ADC V-ref Adjustment ............9-18 9-5-6. ADC Sampling Phase Adjustment ........... 9-19 DVW-250/250P...
  • Page 7 Pedestal Level Adjustment ............9-25 9-7-2. Composite Input Level Adjustment ......... 9-26 9-7-3. CAMERA RETURN VIDEO Level Adjustment ....9-27 9-7-4. INPUT SYNC Level Adjustment..........9-27 10. Spare Parts 10-1. Notes on Spare Parts ................. 10-1 10-2. Exploded Views ..................10-2 DVW-250/250P...

  • Page 9: Manual Structure

    Explains how to replace the main boards. Section 9 Electrical Alignment Explains the general information for electrical adjustments and the electrical adjust- ments of this unit. Section 10 Spare Parts Describes the exploded views for the unit and mounted/printed circuit boards list. DVW-250/250P...

  • Page 10: Relative Manual

    • Maintenance Manual Part 2 (Not supplied with this unit.) This manual describes the information items (adjustments, board layouts, sche- matic diageams, detailed parts list, etc.) that premise the service based on parts. If this manual is required, please contact to Sony’s service organization. DVW-250/250P...

  • Page 11: Service Overview

    • In a car on a hot sunny day • Near heating appliances Power voltage DC12 +5.0 -1.0 Power consumption During recording : 39 W(CONFI ON, SDI OUT ON) 28 W(CONFI OFF, SDI OUT OFF) During STOP mode : 3 W(SAVE mode) DVW-250/250P...

  • Page 12: Locations Of Main Part And Functions Of Printed Circuit Board

    Phone Level Control DUS-339 Head Phone Connector SERVO, KY-315 Panel Switches SYSTEM CONTROL, CON-18 TC IN/OUT Connectors TIMECODE SE-233 Sensor (Casette Coding) DET-26 Sensor (Thread/Unthread) DET-15 Cassette In Detector TR-57 S-Tension Detector POWER SUPPLY DC-85 DC Input Select Switch FU-63 Fuse DVW-250/250P...
  • Page 13 RF Equalizer (PB EQ, PB Envelope Detector) Cue Rec/PB SERVO, SST-3 Servo & System Control, Timecode SYSTEM CONTROL, Full Erase & Channel Erase Oscillator TIMECODE POWER SUPPLY PSW-31A DC-DC Converter PSW-31B DC-DC Converter PSW-31C DC-DC Converter OTHERS MB-601 Mother Board DVW-250/250P...
  • Page 14 1-2. Locations of Main Part and Functions of Printed Circuit Board System Board name Circuit function Loction No. SERVO, CS-25 Cassette Up/Down Detector SYSTEM CONTROL, TIMECODE CS-26 Cassette Up/Down Detector DVW-250/250P...

  • Page 15: Main Mechanical Part Locations

    16: Pinch roller arm Drum 17: T reel table Upper drum 18: S reel table CUE brush 19: S reel belt CUE/TC head 20: FE head 10: Solenoid (T reel brake) 21: S reel motor 11: Solenoid (Pinch) 22: CTL head DVW-250/250P...

  • Page 16: Function And Location Of Sensors

    1-2. Locations of Main Part and Functions of Printed Circuit Board Cassette compartment 23: DC motor 1-2-3. Function and Location of Sensors Mechanical deck !-098 DVW-250/250P...
  • Page 17 This sensor detects the end of the tape that runs in the forward direction. 15: S tension regulator arm sensor During recording and playback, this sensor detects the tension arm position and controls the reel torque to keep a constant S tape tension. DVW-250/250P...

  • Page 18: Matching Connectors

    When external cables are connected to the connector on the connector panel during maintenance, the hardware listed below (or the equivalents) must be used. Panel indication Matching cable connector/cable Connector Sony part No. VIDEO IN 1-560-069-11 SDI IN, SDI OUT VIDEO OUT 1, VIDEO OUT 2...

  • Page 19: Signal Input/Output

    +4 dBm (600 Ω load), balanced AUDIO OUT CH-1 to CH-4 TC OUT 2.2 V p-p (10 kΩ load), unbalanced 1.0 V p-p (75 Ω load), unbalanced –17 dBu maximum (8 Ω load), adjustable EARPHONE –17 dBu maximum (8 Ω load), adjustable HEAD PHONES DVW-250/250P...
  • Page 20 1 ± 0.2 Hz or 4 ± 0.8 Hz (SPARE) SHIELD VTR GND VS = 1 V p-p ± 1 dB CAM RETURN VIDEO DC:0 ±200 mV GND (CAM RETURN VIDEO) Zo = 75 Ω ± 5 % 1-10 DVW-250/250P...
  • Page 21 (SPARE) (SPARE) (SPARE) *1)When analog component camera, analog composite. REMOTE:9-pin (female) <External view> Selectable between SONY 9pin protocol and ISR using the setup menu. (How to change refer to “3-1. Setup Menu”.) SONY 9-pin protocol Pin No. Signal Pin No.

  • Page 22: Removal/Installation Of Cabinet

    4. Remove the four volume knobs and remove the front panel from the unit. At this time, the switch covers are out from the front panel, do not lose them. Notes during installation After attaching the front panel, check the switch covers are attached with it. 1-12 DVW-250/250P...
  • Page 23 2 middles Screws (B3 × 8) Screws (B3 × 6) Left side panel Screw (B3 × 6) Screw Screws (B3 × 6) (B3 × 6) Screws (B3 × 6) Handle Screws (B3 × 8) Bottom plate Screws(B3 × 6) 1-13 DVW-250/250P...

  • Page 24: Cassette Compartment Removal/Installation

    • Attach the cassette compartment in the chassis so that the two guide pins of the cassette compartment are put Note During Installation into the round holes of stage. After install the connector panel, perform the tape path adjustment. (Refer to Section 7-2.) 1-14 DVW-250/250P...

  • Page 25: Battery Terminal Replacement

    2. Remove the defective fuse from the fuse holder and replace it with a new one. FU-63 board Fuse holders 3. Remove the four screws and then replace the battery terminal. Battery retainer Fuses Battery terminal Screws (B2.6 × 5) Screws (B2.6 × 5) 1-15 DVW-250/250P...

  • Page 26: Switch/Slit Land Settings On The Boards

    OPEN SL204 SL207 SHORT OPEN OPEN CH-3 SL302 SL305 OPEN OPEN SHORT SL303 SL306 OPEN SHORT OPEN SL304 SL307 SHORT OPEN OPEN CH-4 SL402 SL405 OPEN OPEN SHORT SL403 SL406 OPEN SHORT OPEN SL404 SL407 SHORT OPEN OPEN 1-16 DVW-250/250P...
  • Page 27 SL701 SHORT OPEN OPEN SL702 OPEN SHORT OPEN SL703 OPEN OPEN SHORT CH-3 SL801 SHORT OPEN OPEN SL802 OPEN SHORT OPEN SL803 OPEN OPEN SHORT CH-4 SL901 SHORT OPEN OPEN SL902 OPEN SHORT OPEN SL903 OPEN OPEN SHORT 1-17 DVW-250/250P...
  • Page 28 SL201 OPEN SHORT OPEN SL202 OPEN OPEN SHORT PB CH-2 SL203 OPEN SHORT OPEN SL204 OPEN OPEN SHORT PB CH-3 SL205 OPEN SHORT OPEN SL206 OPEN OPEN SHORT PB CH-4 SL207 OPEN SHORT OPEN SL208 OPEN OPEN SHORT 1-18 DVW-250/250P...

  • Page 29: Board

    1-10. Switch/Slit Land Settings on the Boards 1-10-3. DIF-31 board S300 DIF-31 B SIDE Ref No. Name Description Factory setting S300-1 ENCODER-VCO adjustment switch : VCO adjustment OFF : Normal use S300-2 DECODER-VCO adjustment switch : VCO adjustment OFF : Normal use 1-19 DVW-250/250P...
  • Page 30 1-10. Switch/Slit Land Settings on the Boards 1-10-4. DPR-62 board CN201 CN202 CN212 CN213 CN203 SL100 CN204 DPR-62 B SIDE Ref No. Description Factory setting SL100 Factory use OPEN 1-20 DVW-250/250P...

  • Page 31: Board

    REC/PB ENV switch Using at tape path adjustment. : R/P envelope detect mode (Turn the power off in the EQ-54 board and drum) OFF : Normal use S700-2 – Factory use S700-3 – Factory use S700-4 – Factory use 1-21 DVW-250/250P...

  • Page 32: Board

    After setting, push the switch S1 on the SST-3 board. S151-4 – Factory use S151-5 – Factory use S151-6 – Factory use S151-7 – Factory use S151-8 – Factory use S501 – Factory use – S502 – Factory use – S503 – Factory use 1-22 DVW-250/250P...

  • Page 33: Board

    1-10. Switch/Slit Land Settings on the Boards 1-10-7. VPR-12 board CN209 CN210 SL200 VPR-12 A SIDE Ref No. Description Factory setting SL200 Factory use OPEN 1-23 DVW-250/250P...

  • Page 34: Ejecting The Cassette Tape Manually

    If not, turn the reel motor driving gear to clockwise while pulling the brake release lever in the direction of the arrow. Brake release lever Reel motor driving gear Manual eject gear (red) 1-24 DVW-250/250P...

  • Page 35: Cleaning When The Heads Are Clogged

    1-13-2. Audio Meter Contrast Adjustment When perform the audio meter contrast adjustment, perform the following steps. 1. Remove the screw and open the L SUB cover. 2. Put the driver into the hole for LCD contrast, and adjust the LCD contrast. 1-25 DVW-250/250P...

  • Page 36: Fixture

    Fig. No. Part No. Description For use J-6031-840-B Multi Connector Cable (CIBNC) Video system adjustment J-6086-570-A Reference Flat Plate Audio/TC head zenith adjustment J-6322-420-A Tape Guide Adjustment Driver (45) Tape path adjustment J-6322-420-3 TG Driver Spare Bit (across 0.89) (for spare) 1-26 DVW-250/250P...
  • Page 37 J-7031-280-A S-TEN Adjusting Table Tension regulator adjustment J-7031-450-A End Sensor Positioning Tool END sensor position adjustment 7-651-000-10 SONY Grease, SGL-601 (50 g) Lubricating 7-651-000-11 SONY Grease, SGL-801 (50 g) 7-700-736-06 L-shaped Hexagonal Wrench (d=0.9 mm) Removal of screw Standard Products...
  • Page 38 1-14. Optional Accessories 1-28 DVW-250/250P...

  • Page 39: Measuring Equipment

    1-14. Optional Accessories 1-14-3. Measuring Equipment Equipment Model AC Adapter or Battery Sony AC-550 (for UC) /550CE (for SY) or equivalent Oscilloscope Tektronix 2465B or equivalent Analog Composite Signal Generator Tektronix 1410 (for NTSC) /1411 (for PAL) or equivalent Waveform Monitor/Vectorscope...

  • Page 41: Error Messages

    The checksum error arise in the RAM with battery backup for system control. IC28/SST-3 board SV NV-RAM TROUBLE The checksum error arise in the NV-RAM for servo. IC405/SST-3 board INTERFACE ERROR The interface between SY(IC15/SST-3 board) and PROC(IC305/DPR-62 board) is defective. DVW-250/250P...

  • Page 43: Maintenance Mode

    Section 3 Maintenance Mode 3-1. Setup Menu The DVW-250/250P has the setup menu required for the setting of function, etc. This menu has the tree structure. Enclose the PAGE in angle bracket on the audio meter LCD. Operation 1. Activate the setup menu Press the DISPLAY button once or twice until the setup menu appears on the audio meter LCD.
  • Page 44 ..... Toggle serial digital output on and off. : output OFF : no output V PROC ..... Select whether or not video signal accords to CF information. OFF : According to CF : no according to CF (no H shift) EXIT DVW-250/250P...
  • Page 45 AUTO: Adjust phase of LTC signal to correspond to the video output. REC RUN ..... Select time code recorded when F-RUN/R-RUN switch set to R-RUN. : time code produced by time code generator TAPE : time code played back from tape EXIT DVW-250/250P...
  • Page 46 : Save in bank 2. : Save in bank 3. EXIT ..... Select whether to use REMOTE connector for ISR. OFF : no ISR; use as Sony 9-pin protocal interface. : use as ISR interface. SPEED ..... Set data transmission speed in ISR mode.

  • Page 47: Diag Menu

    3-2. DIAG Menu 3-2. DIAG Menu The DVW-250/250P has the DIAG menu required for the adjustment and diagnostics. This menu has the tree structure. Enclose the PAGE in angle bracket on the audio meter LCD. When adjust servo or RF using the DIAG menu, turn S151-1 (F-1) switch on SST-3 board to ON.
  • Page 48 NVRAM INITIAL SV DATA SAVE CTL PHS <PATH> REC TEST *1: When the DIAG menu activates in the box as shown by the dotted line, turn S151-1 (F-1) on the SST-3 board to ON before activating the DIAG menu. DVW-250/250P...
  • Page 49 : Pulse and Bar : Multi Burst : H Sweep : 5 Step : Ramp : Shallow Ramp : Red : 50% Flat : 100% Flat : Black Burst : Pathlogical Check Code : NTC7 (for NTSC) /LINE330 (for PAL) DVW-250/250P...
  • Page 50 Use RF(Rec current) adjustment. (Refer to “9-5. RF Adjustment”.) START ....... Start the adjustment automatically EXIT NV-RAM Save RF adjustment data (Refer to “5-5. RF Adjustment”.) LOAD ....... Load the adjustment data. SAVE ....... Save the adjustment data. EXIT DVW-250/250P...
  • Page 51 (Enabled when the cassette-in sensor is set to ON.) Push the REW button : Move upward the cassette compartment. LOAD ..... Cassette-down sensor 1 : Activate sensor 0 : Deactivate sensor UNLOAD :1 ..... Cassette-up sensor 1 : Activate sensor 0 : Deactivate sensor DVW-250/250P...
  • Page 52 ....... Capstan free speed adjustment DRUM PG ....... Drum PG phase adjustment EXIT NVRAM CONTROL Save servo adjustment data. (Refer to “9-3. Servo Adjustment”.) NVRAM INITIAL ....... Adjustment data initialize. SV DATA SAVE ....... Save servo adjustment data. EXIT 3-10 DVW-250/250P...
  • Page 53 C0 : A,B,C,D,E,F,G,Hch...2 MHz C1 : A,B,C,D,E,F,G,Hch...4 MHz C2 : A,B,C,D,E,F,G,Hch...8 MHz C3 : A,B,C,D,E,F,G,Hch...16 MHz D0 : A,Ech...2 MHz B,C,D,F,G,Hch...No signals D1 : A,Ech...2 MHz B,C,D,F,G,Hch...No signals D2 : A,Ech...2 MHz B,C,D,F,G,Hch...No signals D3 : A,Ech...2 MHz B,C,D,F,G,Hch...No signals EXIT 3-11 DVW-250/250P...

  • Page 54: Isr

    Support The DVW-250/250P corresponds to a ISR (Interractive SETUP?; Status Reporting) function. Using this function, the status of the DVW-250/250P or SETUP? #####; the contents of a generated error can be intensively moni- SETUP #####; tored and managed on the monitor screen of a personal HRS?;...

  • Page 55: Block Diagrams And Circuit Description

    VITC is added. After that, the video data is compressed to a rate of 1/2 by a bit rate reduction & ECC encoder, and an outer ECC is added to the video data for track interleaving. DVW-250/250P...
  • Page 56 SDI video signal. and controls the drum and motor. The audio data is error-corrected after it is outer-corrected. This unit is controlled from external equipment with Sony The resultant data is passed through an audio processor, 9-pin protocol or ISR.
  • Page 57 This enables the remaining battery amount and alarm to be displayed with the power turned off. The SST-3 board mounts an internal lithium battery, stores the RAM data, and drives the time code reader and genera- tor (SST-3 board). DVW-250/250P...
  • Page 58 CONV. ADJUST APR-20 D/A CH4 DATA OUTPUT AUDIO CH-4 OUT DPR-62 ADA-44 RFU AUDIO MONITOR SELECT HEADPHONE CUE/DA TONE HEADPHONE ATT ALARM TONE LEVEL TP551 (FROM SST-3) DUS-339 ALARM ONE LEVEL RV551 ALARM ONE LEVEL VTR SAVE/MON CP-260 VR-205 DVW-250/250P...
  • Page 59 METRIC D/H TP803 LV800 TP800 RV800 H1003 CUE HEAD CV800 CUE REC ON TIMING (FROM SST-3) BIAS CUE MIX GEN. CUE PB TP802 PB EQ TP804 TP805 RV801 REC V TO/FROM POWER RP V SST-3 CONTROL DRIVER EQ-54 OVERALL (1/2) DVW-250/250P...
  • Page 60 TR-57 EPROM SRAM RV402 H1006 DRIVE HEAD REC CTL CTL REC ON THREAD DET. DET-15 THREAD DET. UNTHEREAD DET. DET-26 MODE SE-233 CASS-UP SENSOR CASS- DOWN SENSOR CASSETTE SENSOR CASSETTE CS-25 COMPARTMENT MOTOR DRIVER M1006 CS-26 CASSETTE COMPARTMENT MOTOR DVW-250/250P...
  • Page 61 MOTOR SHAPER CAPSTAN FG(A) TP503 TP504 SHAPER CAPSTAN FG(B) DRUM REF TP505 T-REEL M1003 CTL REF MOTOR T-REEL DRIVER MOTOR TP508 T-REEL SERVO CF M1005 S-REEL S-REEL MOTOR DRIVER MOTOR S-REEL REC/PB CONTROL TO DPR-62 TO EQ-54 OVERALL (2/2) DVW-250/250P...

  • Page 63: Periodic Maintenance And Inspection

    If the cleaning cloth smeared with grease used, grease may attach to the places where it should not. • Do not insert a cassette tape before cleaning fluid completely evaporates. 3. Preparations (1) Turn the power off. (2) Remove the upper panel. (Refer to section 1-5.) DVW-250/250P...

  • Page 64: Cleaning Of Tape Running Surface Of Upper Drum And Video Heads

    (Do not clean the video heads in the vertical direction. This may damage them.) 3. After cleaning, wipe the rotary heads using a dry cleaning cloth. Cleaning cloth Video heads Video heads Tape running surface of the upper drum DVW-250/250P...

  • Page 65: Cleaning Of Tape Running Surface Of Lower Drum And Lead Surface

    3. After cleaning, be sure to wipe the tape running surface of the lower drum and lead surface using a dry cleaning cloth. Skewer(Bamboo) Cleaning cloth Lead surface Tape running surface Lead surface of the lower drum DVW-250/250P...

  • Page 66: Stationary Heads Cleaning

    Remove the magnetic powder completely. 2. After cleaning, be sure to wipe the tape running surfaces of the FE, CTL and CUE/TC heads using a dry cleaning cloth. CTL head FE head CUE/TC head DVW-250/250P...

  • Page 67: Cleaning Of Tape Running System And Tape Cleaner

    Capstan Tape cleaner S3 tape guide T4 tape guide S5 (Tension Regulator) tape guide T1 tape guide T2 tape guide S2 tape guide S1 tape guide Pinch roller T3(T-drawing) tape guide S4(S-drawing) tape guide DVW-250/250P...

  • Page 68: Periodic Check

    5-2. Periodic Check 5-2. Periodic Check To make the most of the functions, fully realize performances of DVW-250/250P, and to lengthen the life of DVW-250/250P and tape, a periodic check is recommended. 5-2-1. Hours Meter DVW-250/250P can display an hours meter on the LCD on the front panel.

  • Page 69: Dvw-250/250P Periodic Replacement List

    5-2. Periodic Check DVW-250/250P Periodic Replacement List Drum rotate (hours) Replacements parts No. Item 500 1000 1500 2000 2500 3000 3500 4000 4500 5000 5500 6000 Part name Part No. ↓ ↓ Upper drum DJR-11-R (NTSC) A-8269-263- DJR-12-R (PAL) A-8269-261- ↓...

  • Page 70: Cares After Using At Special Environment

    4. Clean the connectors on the connector panel. 5. Carry out the common operation check (recording or playback) and check that the unit has not an abnormal sound or operation. If the unit has an abnormal condition, please contact your Sony service organization. DVW-250/250P...

  • Page 71: Replacement Of Mechanical Parts

    • Before using a tool be sure to clean its surface. • Cleaning piece : 2-034-697-00 • Cleaning fluid : 9-919-573-01 • Pay careful attention to do not damage the tool. If the tool is damaged, the adjustment can not correctly carry out. DVW-250/250P...

  • Page 72: Threading End/ Unthreading End Mode

    • During pushing the T reel brake release lever, turn the manual eject gear clockwise as far as it will go while pushing it downward. T reel brake release lever (red label) Red gear Manual eject gear (red) Cassette compartment DVW-250/250P...
  • Page 73 • Turn the red gear on the left of the cassette compartment toward the battery case and put the cassette compartment into the up state. When no cassette is in the cassette compartment, do not turn the red gear. DVW-250/250P...

  • Page 74: Parts Location Of Periodical Replacement Parts

    Pinch Roller Arm Assembly Replacement Battery 6-19. Battery Replacement Tension regulator roller 6-11. Tension Regulator Roller Replacement CTL head 6-16. CTL Head Replacement S reel brake solenoid 6-12. S Reel Brake Solenoid Replacement Cassette compartment herness 6-20. Cassette Compartment Harness Replacement DVW-250/250P...

  • Page 75: Other Cautions

    (a) Put a stop washer to the top of a stop washer fastening tool. (b) Put the top of the tool on the top of the shaft in an upright position. (c) Press down the tool and attach the stop washer to the shaft. Stop washer fastening tool Stop washer Stop washer DVW-250/250P...
  • Page 76 • Smear grease onto the surface of the park like a thin film. • Apart from the relevant areas never use the oil and grease. If grease smeared apart from the relevant areas, be sure to wipe using a gauze or soft cloth. 2mm diam. DVW-250/250P...

  • Page 77: Reel Table Position

    SE-233 board S reel table T reel table Slide link 2. S cassette position: It means that the reel tables are in the position of S cassette. Driving racks SE-233 board S reel table T reel table Slide link DVW-250/250P...
  • Page 78 Turn an idle gear as shown in the figure until the reel table assemblies shift to the desired position and driving rack lock. If a cassette tape is inserted, the reel tables can not be shifted. S cassette L cassette portion portion Idle gear Driving racks S reel table DVW-250/250P...

  • Page 79: Brush Replacement

    The brush assembly can replace when the cassette compartment attaches to the unit. Tools • Torque screwdriver bit (for M2): J-6325-380-A • Torque screwdriver (for 3 kg) : J-6325-400-A Removal 1. Brush cover removal Screws(P2 × 2) (1) Remove the two screws and the brush cover. Brush cover Brush assembly DVW-250/250P...
  • Page 80 (3) Move the brush base (arrow A) while press- ing down the brush base above the brush support and temporarily attach the brush assembly using the other screw. (4) While pushing the brush base (arrow B), tighten the screws in steps (2) and (3). 6-10 DVW-250/250P...
  • Page 81 (6) Connect the connector CN913 on the MB- 601 board. 4. Brush cover installation Align the hole of the brush cover with the shaft of the slip ring, and tighten the brush cover with two screws. Do not load to the brush. 6-11 DVW-250/250P...

  • Page 82: Slip Ring Assembly Replacement

    • Torque screwdriver bit (for M2): J-6325-380-A • Torque screwdriver (for 3 kg) : J-6325-400-A Removal 1. Brush cover removal Remove the brush cover. (Refer to “6-2. Brush Replacement”.) 2. Brush assembly removal Remove the brush assembly. (Refer to “6-2. Brush Replacement”.) 6-12 DVW-250/250P...
  • Page 83 Red lead : RED pattern Blue lead : BLUE pattern Black lead: BLK pattern 5. Brush assembly installation Install the brush assembly. (Refer to “6-2. Brush Replacement”.) UDR-9 board 6. Brush cover installation Install the brush cover. (Refer to “6-2. Brush Replacement”.) 6-13 DVW-250/250P...

  • Page 84: Upper Drum Assembly Replacement

    Preparations 1. Check that the unit is in the unthreading end mode. 2. Turn off the power. 3. Remove the top panel. (Refer to “1-5. Removal/Installation of Cabinet”.) 4. Remove the cassette compartment. (Refer to Section 1-6.) 6-14 DVW-250/250P...
  • Page 85 (2) Assemble the upper drum eccentricity gauges as shown in the figure before use. Removal 1. Brush cover Removal Remove the brush cover. (Refer to “6-2. Brush Replacement”.) 2. Brush assembly removal Remove the brush assembly. (Refer to “6-2. Brush Replacement”.) 6-15 DVW-250/250P...
  • Page 86 (2) Lift just above and remove the upper drum assembly. • Be careful not to damage the upper edge of the lower drum after the upper drum assembly is removed. • Remove the screws from the removed upper drum assembly using a pair of tweezers. 6-16 DVW-250/250P...
  • Page 87 Take care not to touch the video heads against the brush support or peripheral parts when installing the upper drum assembly. (3) Press the upper drum assembly in the direc- tion of the flange until it securely attached. Hole Connector Flange DR-261board 6-17 DVW-250/250P...
  • Page 88 Take care not to touch the probe against the video heads. Upper drum 2nd groove from bottom Probe 1st groove from bottom 6-18 DVW-250/250P...
  • Page 89 N•m (1 kgf•cm). (3) Set the torque screwdriver to 24.5 × 10 –2 N•m (2.5 kgf•cm). (4) Tighten the four screws in the same sequence as in step (2) using a torque screwdriver. (5) Re-check that the specification is met. 6-19 DVW-250/250P...
  • Page 90 After cleaning, be sure to wipe the relevant area using a dry cleaning cloth. Adjustments after replacement 14. Tape path adjustment (Refer to Section 7-1-1.) 15. Servo system adjustment (Refer to Section 9-3.) 16. RF system adjustment (Refer to Section 9-5-1., and 9-5-4 to 9-5-13.) 6-20 DVW-250/250P...

  • Page 91: Drum Assembly Replacement

    3. Remove the top panel. (Refer to “1-5. Removal/Installation of Cabinet”.) 4. Remove the cassette compartment. (Refer to Section 1-6.) Tools • Torque screwdriver bit (for B2): J-6325-380-A • Torque screwdriver (for 3 kg) : J-6325-400-A • Cleaning cloth : 3-184-527-01 • Cleaning fluid : 9-919-573-01 6-21 DVW-250/250P...
  • Page 92 (1) Put the unit into the unthreading end mode. (2) Disconnect connector CN960 (video head cleaner solenoid) on the MB-601 board. (3) Remove one screw, then remove the video head cleaner assembly. Video head cleaner assembly Screw(PSW2 × 5) 6-22 DVW-250/250P...
  • Page 93 CN3) connected to the board at the bottom of the drum. The drum assembly can then be removed. When removing the drum assembly be careful not to damage the CTL head, CUE/ TC head, and peripheral tape guides. 6-23 DVW-250/250P...
  • Page 94 6-5. Drum Assembly Replacement Installation 3. Cleaning of contact surfaces Cleaning Clean the contact surfaces of a new drum assem- Drum assembly bly and chassis using a cleaning cloth moistened with cleaning fluid. Positioning pins Cleaning 6-24 DVW-250/250P...
  • Page 95 Video heads (5) Tighten the three screws. Tightening torque: 19 × 10 –2 N•m (1.9 kgf•cm) (6) Check that the brush correctly touches against the grooves of the slip ring. Positioning pin 6-25 DVW-250/250P...
  • Page 96 7. Video head cleaner assembly position adjustment (Refer to Section 6-14.) 8. Tape path adjustment (Refer to Section 7-1-1.) 9. Servo system adjustment (Refer to Section 9-3.) 10. RF system adjustment (Refer to Section 9-5-1, and 9-5-4 to 9-5-13.) 6-26 DVW-250/250P...

  • Page 97: Driving Belt Replacement

    (2) Open the DPR-62 and SST-3 boards. (Refer to Section 8-2-1 and 8-3.) Insulating plate (3) Remove the rubber ring attached to the boss in the center of the chassis, then remove the insulating plate. Driving belt (4) Remove the driving belt. Rubber ring 6-27 DVW-250/250P...
  • Page 98 • Check that each lever and pin are put into each hole of the insulating plate. (2) Attach the DPR-62 and SST-3 boards. (Refer to Section 8-2-1 and 8-3.) (3) Attach the bottom plate. (Refer to “1-5. Removal/Installation of Cabinet”.) 6-28 DVW-250/250P...

  • Page 99: Pinch Roller Arm Assembly Replacement

    The pinch roller arm assembly can replace with the cassette compartment attaches to the unit. When replacing, prepare a new stop washer (P/N 3-726-829-01). Tools • Stop washer fastening tool: J-6323-530-A • Cleaning piece : 2-034-697-00 • Cleaning fluid : 9-919-573-01 6-29 DVW-250/250P...
  • Page 100 Return spring 5. Pinch roller cleaning Clean the pinch roller surface using a cleaning cloth moistened with cleaning fluid. Hooked portion Adjustment after replacement 6. Tape path adjustment (Refer to Section 7-1-1.) Return spring 6-30 DVW-250/250P...

  • Page 101: Video Head Cleaning Roller Replacement

    MB-601 board. (2) Remove one screw and the video head cleaner assembly. When removing, take care not to touch the cleaner assembly against the drum assembly Video head cleaner assembly (especially the video head). Screw 6-31 DVW-250/250P...
  • Page 102 (1) Temporarily attach the video head cleaner assembly with one screw. When installing, take care not to touch the video head cleaner assembly against the drum (especially the video head). (2) Connect the harness connector to connector CN960 on the MB-601 board. 6-32 DVW-250/250P...
  • Page 103 5. Operation check Push the iron core of the video head cleaner assembly solenoid with fingers to energized state. Check that the AHC roller assembly touches the drum (video head portion) shown in the figure. AHC roller assembly Plunger Solenoid 6-33 DVW-250/250P...

  • Page 104: Cue Brush Replacement

    CUE lever Claw 3. Operation check Check that the cue brush moves and touches the CUE/TC head surface for cleaning when the manual eject gear is turned clockwise and coun- terclockwise while it is pushed downward. 6-34 DVW-250/250P...

  • Page 105: Pinch Solenoid Assembly Replacement

    (4) Turn the manual eject gear clockwise with fingers until the cue brush touches the CUE/ TC head. MB-601 board (5) Remove the pinch solenoid assembly from the unit while moving it toward the MB-601 Screw Harness clamper Screw board. 6-35 DVW-250/250P...
  • Page 106 (4) Perform step (2) again and check that the specification is met. Spec. : A = 0.3 ±0.1 mm 4. Tape path adjustment (Refer to Section 7-1-1.) 6-36 DVW-250/250P...

  • Page 107: Tension Regulator Roller Replacement

    Tape running rough adjustment Tape path adjustment Preparations 1. Put the unit into the unthreading end mode. 2. Turn off the power. Tools • Tape guide adjustment screwdriver: J-6321-500-A • Cleaning piece : 2-034-697-00 • Cleaning fluid : 9-919-573-01 6-37 DVW-250/250P...
  • Page 108 (Turn same degrees in the opposite direction in step (1).) Set screw (6) Turn the upper flange clockwise as far as it Upper flange will go and attach it to the tape guide shaft. Roller C Tension regulator roller Roller C Guide shaft 6-38 DVW-250/250P...
  • Page 109 (5) Push the manual eject gear downward and turn it counterclockwise while pulling the T reel brake release lever. The unit is then put into the unthreading mode, and the drawn tape is rewound to the cassette. Lower frange Curl 6-39 DVW-250/250P...
  • Page 110 (d) Tighten the setscrew. (e) Put the unit into the PLAY mode and check that the tape runs without curling. (4) Press the EJECT button and take out the cassette tape. 4. Tape path adjustment (Refer to Section 7-1-1.) 6-40 DVW-250/250P...

  • Page 111: S Reel Brake Solenoid Replacement

    : 9-911-053-00 • Cleaning piece : 2-034-697-00 • Cleaning fluid : 9-919-573-01 Removal 1. Disconnection of connectors (1) Disconnect the connectors CN951 (S reel motor) and CN952 (S brake solenoid) on the CN951 CN952 MB-601 board MB-601 board. 6-41 DVW-250/250P...
  • Page 112 Brake leaf spring using two screws. (4) Attach the brake leaf spring using two screws. Brake base Longitudinal hole Screws (P2 × 2) 6-42 DVW-250/250P...
  • Page 113 (4) Remove the driving belt left in step 2. 7. Cleaning Clean the following portions using a cleaning piece moistened with cleaning fluid. • S reel motor pulley • Surface of the brake arm which touches the belt • Driving belt • Midway pulley 6-43 DVW-250/250P...
  • Page 114 (3) Attach the bottom plate. (Refer to “1-5. Rubber ring Removal/Installation of Cabinet”.) 10. Connection of connectors Connect the harness connectors to the following connectors on the MB-601 board. • CN951: Harness connector of S reel motor • CN952: Harness connector of S brake solenoid 6-44 DVW-250/250P...

  • Page 115: T Reel Brake Solenoid Replacement

    4. Remove the cassette compartment. (Refer to Section 1-6.) Tools • Torque screwdriver bit (for M2): J-6325-380-A • Torque screwdriver (for 3 kg) : J-6325-400-A • Thickness gauge : 9-911-053-00 • Wire clearance gauge : J-6152-450-A • Cleaning piece : 2-034-697-00 • Cleaning fluid : 9-919-573-01 6-45 DVW-250/250P...
  • Page 116 Right part of MB-601 board 2. Manual eject assembly removal (1) Remove one screw and lift above the manual Manual eject assembly Screw eject assembly. (2) Disconnect the connector (CN1) on the DET- 15 board of the manual eject assembly. 6-46 DVW-250/250P...
  • Page 117 CUE/TC head brush touches the CUE/TC head. Threading motor CUE Brush (3) Remove the pinch solenoid assembly from the chassis while moving it toward the MB- 601 board. Gear ill6 08 01 04 6-47 DVW-250/250P...
  • Page 118 Screw the chassis. Installation 5. T reel brake solenoid replacement (1) Remove the two screws shown in the figure, then remove the brake leaf spring and brake release lever assembly. Brake release plate Brake leaf spring Screws 6-48 DVW-250/250P...
  • Page 119 (4) Check that the clearance between the iron core and brake base meets the specification when the iron core is pushed with fingers to energized state. If not, repeat steps (1) and (2). Solenoid Spec. : A = 2.5 ±0.2mm 6-49 DVW-250/250P...
  • Page 120 (3) Tighten the T reel motor assembly using two screws. Brake arm (4) Put the driving belt on the Midway pulley Motor pulley while holding the driving belt so that it does not come off from the motor pulley. 6-50 DVW-250/250P...
  • Page 121 • CN943 : Harness connector of T reel motor • CN953 : Harness connector of pinch solenoid • CN947 : Harness connector of TC head • CN949 : Harness connector of CUE/TC erase head • CN942 : Harness connector of T brake solenoid 6-51 DVW-250/250P...
  • Page 122 Gear(black) in step (2). The position of the manual eject assembly is then adjusted. (4) Pull out the wire clearance gauge. Motor gear Position adjusting screw Adjustment after replacement 18. Tape path adjustment (Refer to Section 7-1-1.) 6-52 DVW-250/250P...

  • Page 123: Video Head Cleaner Solenoid Replacement

    (3) Attach a new solenoid to the cleaner base in the direction shown in the figure while putting the groove of the iron core of the solenoid in the boss of the solenoid lever, and tighten it with the two screws. Screws 6-53 DVW-250/250P...
  • Page 124 (Refer to Section 6-8.) 4. Video head cleaner assembly position adjustment Adjust the position of the video head cleaner assembly. (Refer to Section 6-8.) 5. Operation check Check that the video head cleaner operates normally. (Refer to Section 6-8.) 6-54 DVW-250/250P...

  • Page 125: Capstan Motor Replacement

    • Torque screwdriver (for 3 kg) : J-6325-400-A • Cleaning cloth : 3-184-527-01 • Cleaning fluid : 9-919-573-01 Removal 1. Mode setting Turn the manual eject gear clockwise until the Manual eject knob CUE brush cue brush touches the CUE/TC head. CUE/TC head 6-55 DVW-250/250P...
  • Page 126 (2) Remove the three screws from the top of the chassis while holding the capstan motor with hand, and remove the capstan motor from the back side of the chassis. Be careful not to fall the capstan motor. Capstan motor Connector 6-56 DVW-250/250P...
  • Page 127 (2) Attach the DPR-62 and SST-3 boards. (Refer to Section 8-2-4 and 8-3.) 6. Cleaning Clean the capstan motor shaft using a cleaning piece moistened with cleaning fluid. Adjustment after replacement 7. Servo system adjustment (Refer to Section 9-3.) 6-57 DVW-250/250P...

  • Page 128: Ctl Head Replacement

    2. Turn off the power. 3. Remove the top panel. (Refer to “1-5. Removal/Installation of Cabinet”.) Tools • Torque screwdriver bit (for M2): J-6325-380-A • Torque screwdriver (for 3 kg) : J-6325-400-A • Cleaning cloth : 3-184-527-01 • Cleaning fluid : 9-919-573-01 6-58 DVW-250/250P...
  • Page 129 (2) Remove the two screws and the entrance head assembly. Take care not touch screwdriver against the video head, drum, erase head, tape guide, and CN955 CN956 other parts. Screw Entrance heads assembly Screw (PSW 2 × 5) (PSW 2 × 5) 6-59 DVW-250/250P...
  • Page 130 Screw (2) Connect the two harness connectors of the entrance head assembly to the connectors CN955 and CN956 on the MB-601 board. Reference hole Enterance heads assembly Bosses 6-60 DVW-250/250P...
  • Page 131 • After cleaning, be sure to wipe the relevant area using a dry cleaning cloth. • Never touch the tape cleaner with bare hands during the tape cleaner cleaning. Adjustment after replacement 5. Tape path adjustment (Refer to Section 7-1-1.) 6-61 DVW-250/250P...

  • Page 132: Cue/Tc Head Replacement

    Azimuth adjusting screw following steps. If tightening or loosening, the azimuth and zenith of the CUE/TC head will change, and serious trouble will occur at the tape Zenith adjusting screw path or video tracking adjustments. CUE/TC head assembly Drum 6-62 DVW-250/250P...
  • Page 133 (2) Disconnect the two connectors CN947 (TC head) and CN949 (cue erase head) on the MB-601 board. (3) Disconnect the two ground plugs CN931 and CN932 on the MB-601 board. (EQ-54 board) CN932 CN931 CN949 CN947 (Right part of MB-601 board) 6-63 DVW-250/250P...
  • Page 134 (2) Remove the four screws shown in the figure, and remove the exit head assembly from the unit. CUE/TC head Hole CUE brush Take care not to scratch the drum and other parts. CUE link assembly 6-64 DVW-250/250P...
  • Page 135 (6) Put the bottom of the harness holder into the groove of the base shown in the figure and attach it using one screw. Screws CUE/TC head Adjusting plate(R) Black Brown Yellow Orange Shield case White Glay Blue CUE/TC head 6-65 DVW-250/250P...
  • Page 136 • CN949: Harness connector of CUE/TC erase head Connect a harness connector to the following connector on the EQ-54 board. • CN304: Harness connector of CUE head 9. EQ-54 board attachment Close and attach the EQ-54 board. (Refer to Section 8-6.) 6-66 DVW-250/250P...
  • Page 137 Clean the CUE/TC head using a cleaning cloth moistened with cleaning fluid. After cleaning, be sure to wipe the CUE/TC head using a dry cleaning cloth. Adjustment after replacement 13. Tape path adjustment (Refer to Section 7-1-1.) 14. Audio system adjustment (Refer to Section 9-4.) 6-67 DVW-250/250P...

  • Page 138: Threading Motor Replacement

    Remove the manual eject assembly. (Refer to “6- 13. T Reel Brake Solenoid Replacement”.) 2. Lid opener assembly removal (1) Disconnect the connector CN944 on the MB- 601 board. (2) Remove the two screws and the lid opener assembly. 6-68 DVW-250/250P...
  • Page 139 (2) Remove the spring attached at the top of the gear block assembly. (The other hook of the spring remains to the pinch lever.) (3) Remove the three screws and the gear block assembly. Gear block Screws Screw Shaft of ST driving gear Remove the spring 6-69 DVW-250/250P...
  • Page 140 Threading motor (3) Attach the threading motor in the gear block assembly using the two screws. Pinion B Wiring side Threading motor Be flush the pinion gear with the motor shaft. Pinion gear 6-70 DVW-250/250P...
  • Page 141 (Refer to “6-13. T Reel Brake Solenoid Replace- ment”.) 9. Operation check Check that the cue cleaner and S and T sliders smoothly operate when the manual eject gear is turned clockwise and counterclockwise while it is pushed downward. 6-71 DVW-250/250P...

  • Page 142: Battery Replacement

    (2) Desolder the battery terminals on the SST-3 board, and remove the battery. (3) Solder a new battery to the SST-3 board. (4) Fix the battery to the SST-3 board with a new fastener. Never protrude a knot from the outside of the board. 6-72 DVW-250/250P...
  • Page 143 1) to the SST-3 board. (3) Close the DPR-62 board. (4) Connect the harness connectors to the connectors CN209 and CN210 on the VPR- 12 board. (5) Close the back side of the chassis. Battery SST-3 board 6-73 DVW-250/250P...

  • Page 144: Cassette Compartment Harness Replacement

    (3) Disconnect the connector connected to the Screw CS-26 board CS-25 board. 2. Disconnection of connector on CS-26 board (1) Unhold the harness clamper shown in the figure and cancel the holding of the harness. (2) Disconnect the connector connected to the CS-26 board. 6-74 DVW-250/250P...
  • Page 145 CS-25 board. (4) Fix the harness securely to the board using the harness clamper removed in step 1) while removing the harness slacking. 4. CS-25 board installation Attach the CS-25 board on the cassette compart- ment. 6-75 DVW-250/250P...

  • Page 146: S Reel Motor Assembly Replacement

    • Torque screwdriver (for 3 kg) : J-6325-400-A • Thickness gauge : 9-911-053-00 Removal 1. Connector disconnection Disconnect the two connectors (CN951 (S reel motor) and CN952 (S brake solenoid)) on the CN951 CN952 MB-601 board MB-601 board. 6-76 DVW-250/250P...
  • Page 147 (3) Install a new reel motor in the brake base Screw(B2 × 3) Screws(B2 × 3) with three screws. (4) Pass the motor pulley removed in step (1) through the reel motor shaft in the direction shown in the figure. Brake deck Label Reel motor 6-77 DVW-250/250P...
  • Page 148 (1) Clean the following portion with cleaning cloth moistened with cleaning liquid. • Motor pulley of S reel motor • Portion where the brake arm touches the belt (2) Install the S reel motor assy from the top of the chassis with two screws. 6-78 DVW-250/250P...
  • Page 149 Connect harness connectors to the connectors on the MB-601 board below. • CN951: Harness connector of S reel motor • CN952: Harness connector of S brake solenoid Adjustment after replacement 9. Servo system adjustment (Refer to section 9-3.) 6-79 DVW-250/250P...

  • Page 150: T Reel Motor Assembly Replacement

    (3-169-371-02) and retaining ring (7-624-190-11) when the T reel motor assy is replaced. (Do not reuse the removed parts.) Tool • Torque screwdriver bit (for M2) : J-6325-380-A • Torque screwdriver (for 3 kg) : J-6325-400-A • Thickness gauge : 9-911-053-00 6-80 DVW-250/250P...
  • Page 151 Right part of MB-601 board 2. Manual eject assy removal (1) Remove one screw and lift the manual eject Manual eject assembly assy. Screw (2) Disconnect connector CN1 connected to the DET-15 board of the manual eject assy. 6-81 DVW-250/250P...
  • Page 152 (2) Turn the gear at the top of threading motor clockwise with fingers until the cue brush CUE/TC head touches the CUE/TC head. Threading motor CUE Brush (3) Remove the pinch solenoid from the unit while moving it to the MB-601 board. Gear 6-82 DVW-250/250P...
  • Page 153 Motor pulley (1) Loosen one setscrew and remove the motor pulley. Screw(B2 × 3) (2) Remove the three screws, then remove the T Set screw reel motor from the brake base. Screws(B2 × 3) Brake deck Label Reel motor 6-83 DVW-250/250P...
  • Page 154 (9) Put a thickness gauge (4 mm thick) between Brake deck the motor pulley and brake base and tighten the setscrew. (10)Pull out the thickness gauge. Reel motor Spec. : =4mm (11)Reconfirm that the clearance satisfies the specification. 6-84 DVW-250/250P...
  • Page 155 (4) Rotate the relay pulley manually by two or three turns while releasing the reel brake with fingers and confirm that the driving belt is almost put in the center of the motor pulley and relay pulley. Brake arm Motor pulley 6-85 DVW-250/250P...
  • Page 156 • CN947: Harness connector of TC head • CN949: Harness connector of TC/CUE erase head • CN942: Harness connector of T brake plunger Adjustment after replacement 14. Servo system adjustment (Refer to section 9-3.) 15. Tape path adjustment (Refer to section 7-1-1.) 6-86 DVW-250/250P...

  • Page 157: S Arm Assembly Replacement

    When replacing, prepare new two types of stop washer (P/N 3-669-465-01 and P/N 3-726-829-01). Tools • Stop washer fastening tool : J-6323-530-A • Cleaning cloth : 3-184-527-01 • Cleaning fluid : 9-919-573-01 • Oil : 7-661-018-18 • Molyton grease : 7-662-001-41 6-87 DVW-250/250P...
  • Page 158 (2) Remove the stop washer of the drawing arm. Stop washer S drawing arm 2. Mode set change Turn the manual eject gear clockwise until the tape guide of the S slider reaches in the front of S slider the CTL head. CTL head 6-88 DVW-250/250P...
  • Page 159 • Insert the roller at the back of the S arm assembly into the groove of the drawer arm gear. S drawing arm (6) Insert the compression spring into the fixing shaft of the S arm assembly and attach it using a new stop washer (3-726-829-01). 6-89 DVW-250/250P...
  • Page 160 Turn the manual eject gear clockwise and coun- terclockwise, and check that the threading and unthreading are performed smoothly. 6. Cleaning Clean the tape guide using a cleaning cloth moistened with cleaning fluid. Adjustment after replacement 7. Tape path adjustment (Refer to Section 7-1-1.) 6-90 DVW-250/250P...
  • Page 161 Stop washer and E-ring are used to install the T link and T drawing arm assy. Prepare a new stop washer (3-669-465-01) and a new E-ring (7-624-102-01) during replacement. Tool • Stop washer insertion tool : J-6323-530-A • Cleaning cloth : 3-184-527-01 • Cleaning liquid : 9-919-573-01 • Oil : 7-661-018-18 6-91 DVW-250/250P...
  • Page 162 (3) Lift the T drawing arm assy and T link and remove them from the chassis. • Do not touch the drum during removal. • Be careful not to lose the slider under the T drawing arm assembly. T drawing arm E-ring assembry Stop washer T link 6-92 DVW-250/250P...

  • Page 163: T Link And T Drawing Arm Replacement

    Install the torsion spring direct the longer hook side to the cam gear. Cam gear 6-93 DVW-250/250P...
  • Page 164 T link. 6. Cleaning Clean the pinch roller, tape guide, and capstan shaft with cleaning cloth moistened with cleaning liquid. Adjustment after replacement 7. Tape path adjustment (Refer to section 7-1-1.) 6-94 DVW-250/250P...
  • Page 165 And it is explained in this section that the phase adjustment of the intermittent gear. Preparations 1. Check that the unit is in unthreading end mode. 2. Turn the power off. 3. Remove the top panel. (Refer to section 1-5) When replacing, prepare new stopwashers (3-726-829-01) and new E-rings (7-624- 102-01). 6-95 DVW-250/250P...
  • Page 166 5. S arm assembly removal Remove the S arm assembly. (Refer to section 6-23. “S arm assembly replacement”) 6. T drawing arm assembly removal Remove the T drawing arm assembly. (Refer to section 6-24. “T link and T drawing arm assembly replacement”) 6-96 DVW-250/250P...
  • Page 167 9. Threading link assembly removal (1) Remove the nine screws shown in the figure. (2) Remove the threading link assembly. Screws(PWH1.4 × 2.5) Do not touch the rails against the stationary heads. Screw(PWH1.4 × 2.5) Screws(PWH1.4 × 2.5) 6-97 DVW-250/250P...
  • Page 168 S rail (2) Remove the two screws, and remove the rail and the threading gear assembly from the threading base. Flange portion S threading gear assy Screws(PWH1.4 × 2.5) T rail T threading gear assy Threading base 6-98 DVW-250/250P...
  • Page 169 (3) Attach the rail using the two screws. (4) Put the flange portion at the link shaft of the ST driving gear T threading gear assembly in the rail while opening the groove of the rail. T threading gear assy Stop washer ST driving gear 6-99 DVW-250/250P...
  • Page 170 (1) Put the slider(S/T) in the rail in the direction S slider T slider of the arrow. (2) Put the installing shaft of the slider in the hole of the link using the new E-ring. S rail T rail 6-100 DVW-250/250P...
  • Page 171 S slider Hole T slider ST driving gear 15. Threading link assembly installation (1) Turn the manual eject gear clockwise so that the cam gear is at the position shown in the Intermittent gear F cam gear figure. 6-101 DVW-250/250P...
  • Page 172 F cam gear S threading gear S threading gear Half circle or paint ST driving gear 16. Catcher S/T installation (1) Attach the catcher S using the three screws. (2) Attach the catcher T using the three screws. 6-102 DVW-250/250P...
  • Page 173 ·Square hole is not seen. 18. T drawing arm assembly installation Refer to section 6-24. “T link and T Drawing Arm Replacement”. 19. S arm assembly installation Refer to section 6-23. “S arm assembly Replace- ment”. 6-103 DVW-250/250P...
  • Page 174 (Refer to section 5-1-3) After cleaning, be sure to wipe the relevant areas using a dry cleaning cloth. Adjustment after this replacement 25. Tape path adjustment (Refer to section 7-1-1) 26. Tension regulator adjustment (Refer to section 7-3-1) 6-104 DVW-250/250P...

  • Page 175: Tape Path Alignment

    Section 7 Tape Path Alignment 7-1. General Information for Tape Path Adjustment 7-1-1. Tape Path Adjustment Flow Perform the tape path adjustment of DVW-250/250P as following flow chart. Referrence : 1 • Upper Drum Replacement START • Drum Replacement • Tension Regulator Roller Replacement •...

  • Page 176: Locations Of Tape Running System

    CTL head Drum S2 tape guide S1 tape guide S4(S-drawing)tape guide Drum exit side (Unthreading end mode) Capstan CUE/TC head T4 tape guide Drum T2 tape guide T3 tape guide Pinch roller Slip ring T1 tape guide Lead DVW-250/250P...

  • Page 177: Notes

    Next carry out the checks and fine adjustments of the tape running using an align- ment tape ZR2-1/P. • About screws at the top of the tape guides. Tighten the screws at the top of the tape guides to the following tightening torque. –2 9×10 N • m (0.9 kgf • cm) DVW-250/250P...

  • Page 178: Preparations

    • CUE/TC head head-to-tape contact adustment 20 : 00 12 kHz, 0 VU 16MHz (ALL CH) 25 : 00 50% FLAT FIELD • PG adustment (ALL CH) 27 : 00 The CTL head height adjustment can use at any position of this alignment tape. DVW-250/250P...

  • Page 179: Tape Path Adjustment

    (3) Check that the tape runs without any curl at S5 guide, S4 guide and S3 guide. If tape curl occurs by all means, the tape curl shown in the table below is acceptable. If not, perform the adjustment from steps 9) and later. DVW-250/250P...
  • Page 180 10 minutes.) (1) Put into the REW mode at the end portion of BCT- D124L. (2) Check the tape curl as the same manner of step (2) in 4. If not, perform the adjustment from steps 9) and later. DVW-250/250P...
  • Page 181 (8) Tighten the screws at the top of the tape guides to the following tightening torque. –2 9×10 N • m (0.9 kgf • cm) DVW-250/250P...
  • Page 182 Acceptable range of tape curl Guide Rev ×2 mode Less than 1/10 Less than 1/10 of Not acceptable F FWD mode of tape width tape width REW mode Upper frange The tape curl is less than 1/10 of the tape width. Curl Tape DVW-250/250P...

  • Page 183: Ctl Head Height Adjustment

    (Refer to “1-5. Removal/Installation of Cabinet”.) 3. Connect an oscilloscope. CH-1: TP5/MB-601 (CTL) TRIG: TP8/MB-601 (CF) 4. Connect a regulated DC power supply to DC IN connector on the connector panel. 5. Turn the power on. 6. Insert an alignment tape ZR2-1/1P. DVW-250/250P...
  • Page 184 (2) Turn the height adjusting nut clockwise, and adjust so that the output waveform is the maximum. 4. If the level increases when pushing up the tape Turn the height adjusting nut clockwise, and adjust so that the output waveform is the maximum. 7-10 DVW-250/250P...
  • Page 185 8. Connect a regulated DC power supply to DC IN connector on the connector panel. 9. Turn the power on. 10. On the setup menu, set AUTO TRACKING to OFF. 11. Insert an alignment tape ZR2-1/1P. 12. Set the color frame switch on the connector panel to 7-11 DVW-250/250P...

  • Page 186: Ctl Head Position Adjustment

    4. CTL head position re-check Re-check the CTL head position according to steps 1) and • After adjustment, set the switch S700-1 on the EQ-54 board to OFF. • On the setup menu, set AUTO TRACKING to first state (OFF or ON). 7-12 DVW-250/250P...

  • Page 187: Dip Switch Setting

    2. Set all four switches of DIP switches S1 and S2 on the S700 UDR-9 board which attaches to the upper drum to ON. EQ-54 board 3. Set switch S700-1 on the EQ-54 board to ON. 4. Turn the power on. UDR-9 board S1,S2 7-13 DVW-250/250P...

  • Page 188: S1 Guide Slantness Adjustment

    7. Set switch S700-1 on the EQ-54 board to ON. 8. Turn the power on. 9. On the setup menu, set AUTO TRACKING to OFF. 10. Insert an alignment tape ZR2-1/1P. Adjustments 1. Playback the alignment tape. Play back the alignment tape ZR2-1/1P (from 00:00 to 15:00). 7-14 DVW-250/250P...
  • Page 189 (2) And then, tighten the screw b . 3. S1 guide slantness check Repeat the mode change from EJECT mode to PLAY mode 3 times. Check that the envelope waveform A meets the specification. If not, perform step 1) and later again. 7-15 DVW-250/250P...

  • Page 190: S2 Guide Height Adjustment

    8. Turn the power on. 9. Insert an alignment tape ZR2-1/1P. 10. On the setup menu, set AUTO TRACKING to OFF. Adjustments 1. Playback the alignment tape. Play back the alignment tape ZR2-1/1P (from 00:00 to 15:00). 7-16 DVW-250/250P...
  • Page 191 N • m (0.9 kgf • cm) 3. S2 guide height check Repeat the mode change from EJECT mode to PLAY mode 3 times. Check that the rising edge of the envelop waveform during PLAY mode is the same as the pre- PLAY mode. 7-17 DVW-250/250P...

  • Page 192: S Side Tape Running Check

    S4 guide, S3 guide, S2 guide and lead of the drum. If tape curl occurs by all means, the tape curl shown in the table below is acceptable. If not, perform the adjustment from “7-2-1. S3/S5 Tape Guide Height Adjustment”.) 7-18 DVW-250/250P...
  • Page 193 (1) Put into the REW mode at the end portion of BCT- D124L. (2) Check the tape curl as the same manner of step (2) in 4. If not, perform the adjustment from “7-2-1. S3/S5 Tape Guide Height Adjustment”.) 7-19 DVW-250/250P...
  • Page 194 *1: Tape curl at the center of tape wrap is not acceptable. *2: Tape curl should be disappeared within 1 sec. when the mode change is performed from each mode to PLAY. Upper frange The tape curl is less than 1/10 of the tape width. Curl Tape 7-20 DVW-250/250P...

  • Page 195: T1 Guide Slantness Adjustment

    6. Turn the power on. 7. On the setup menu, set AUTO TRACKING to OFF. 8. Insert an alignment tape ZR2-1/1P. Adjustments 1. Playback the alignment tape. Play back the alignment tape ZR2-1/1P (from 00:00 to 15:00). 7-21 DVW-250/250P...
  • Page 196 (2) And then, tighten the screw a . 3. T1 guide slantness check Repeat the mode change from EJECT mode to PLAY mode 3 times. Check that the envelope waveform A meets the specification. If not, perform step 1) and later again. 7-22 DVW-250/250P...

  • Page 197: T2 Guide Height Adjustment

    6. Turn the power on. 7. Insert an alignment tape ZR2-1/1P. 8. On the setup menu, set AUTO TRACKING to OFF. Adjustments 1. Playback the alignment tape. Play back the alignment tape ZR2-1/1P (from 00:00 to 15:00). 7-23 DVW-250/250P...
  • Page 198 Trailing edge 3. T2 guide height check Repeat the mode change from EJECT mode to PLAY mode 3 times. Check that the rising edge of the envelop waveform during PLAY mode is the same as the pre- PLAY mode. 7-24 DVW-250/250P...

  • Page 199: Alignment Tape Tracking Check

    6. Turn the power on. 7. On the setup menu, set AUTO TRACKING to OFF. 8. Insert an alignment tape ZR2-1/1P. Checks 1. Playback the alignment tape. Play back the alignment tape ZR2-1/1P (from 00:00 to 15:00). 7-25 DVW-250/250P...
  • Page 200 (7) Put the unit into REV ×2 mode. After several seconds, put the unit into PLAY mode. Check that the start-up time of the waveform is within 1 sec likes shown in figure. (8) Perform steps (4) to (6) three times. 7-26 DVW-250/250P...

  • Page 201: T3 Guide Height Adjustment

    (2) Check that the tape runs without any curl at T3 guide. If tape curl occurs by all means, the tape curl shown in the table below is acceptable. If not, perform the adjustment from steps 9) and later. 7-27 DVW-250/250P...
  • Page 202 10 minutes.) (1) Put into the REW mode at the end portion of BCT- D124L. (2) Check the tape curl as the same manner of step (2) in 4. If not, perform the adjustment from steps 9) and later. 7-28 DVW-250/250P...
  • Page 203 Less than 1/10 of tape curl tape width Tape contacting Lower flange (Using BCT-L124L) Tape Capstan motor CH erase Acceptable range of tape curl Guide Rev ×2 mode Less than 1/10 F FWD mode of tape width REW mode 7-29 DVW-250/250P...
  • Page 204 (3) Check that the tape returns to the primary portion when the bamboo stick is removed. (4) If the tape does not return, bring down the T3 guide a little way. And perform the step (2) and (3) again. Pinch roller 7-30 DVW-250/250P...
  • Page 205 CH-2: TP6/MB-601 (TC) 6. Connect a regulated DC power supply to DC IN connector on the connector panel. 7. Turn the power on. 8. On the setup menu, set AUTO TRACKING to OFF. 9. Insert an alignment tape ZR2-1/1P. 7-31 DVW-250/250P...

  • Page 206: Cue/Tc Head Position Adjustment

    (3) Turn the screwdriver and adjust the CUE/TC head position so that the specification is met. (4) While holding the screwdriver in step (3), tighten the Spec. DVW-250 : 450 ±400 µs two screws. DVW-250P : 460 ±400 µs 4. CUE/TC head position re-check Re-check according to the check procedures.

  • Page 207: Cue/Tc Head Height Adjustment

    5. Connect a regulated DC power supply to DC IN connector on the connector panel. 6. Turn the power on. 7. On the setup menu, set the SEARCH speed to × 2. (Refer to Section 3-1.) 8. Insert an alignment tape ZR2-1/1P. 7-33 DVW-250/250P...
  • Page 208 Check the CUE/TC head height according to the check procedures. 6. SEARCH speed re-setting On the setup menu, reset SEARCH speed to the former Spec. : The level decreases when pressing down speed. and pushing up the alignment tape. 7-34 DVW-250/250P...

  • Page 209: Cue/Tc Head Azimuth Adjustment

    5. Connect a regulated DC power supply to DC IN connector on the connector panel. 6. Turn the power on. 7. On the setup menu, set the SEARCH speed to × 2. (Refer to Section 3-1.) 8. Insert an alignment tape ZR2-1/1P. 7-35 DVW-250/250P...
  • Page 210 • How to put into the REV SEARCH mode; Press the REW button after pressing the SEARCH button. Maximize 3. SEARCH speed change On the setup menu, reset SEARCH speed to the former speed. 7-36 DVW-250/250P...

  • Page 211: Drum Pg Phase Adjustment

    6. Connect a regulated DC power supply to DC IN connector on the connector panel. 7. Turn the power on. 8. Insert an alignment tape ZR2-1/1P. 9. On the setup menu, set AUTO TRACKING to OFF. 10. Turn the tracking control volume to the mechanical center(click position). 7-37 DVW-250/250P...
  • Page 212 (5) Move the cursor to “DRUM PG” , and press the SET button. 3. PG adjustment Adjust the time A to meet the specification shown in figure by pressing the UP/DOWN button. CH-1(REC A) CH-2(CF) Spec. : A = 3.0 ±1.0 µs 7-38 DVW-250/250P...

  • Page 213: Ctl Head Position Check

    11. Set the color frame switch on the connector panel to Checks 1. Oscilloscope setting (1) Connect an oscilloscope CH-1 : TP10/MB-601 (REC A) TRIG : TP8/MB-601 (CF) 2. Playback the alignment tape Play back the alignment tape ZR2-1/1P (from 00:00 to 15:00). 7-39 DVW-250/250P...
  • Page 214 CH-2 : TP14/MB-601 (SEG) 5. Playback the alignment tape Playback the alignment tape ZR2-1/1P (from 25:00 to 27:00). 6. CTL head position check (2) Check that each waveforms are rising at the same time. (CF) TP14 (SEG) Rise at same time 7-40 DVW-250/250P...

  • Page 215: Dip Switch Re-Setting

    2. Set all four switches of DIP switches S1 and S2 on the UDR-9 board which attaches to the upper drum to OFF. S700 3. Set the switch S700-1 on the EQ-54 board to OFF. EQ-54 board 4. Turn the power on. UDR-9 board S1,S2 7-41 DVW-250/250P...

  • Page 216: Self Rec/Pb Tracking Check

    (7) Insert a blank tape and press the REC and PLAY button simultaneously so that the test signal is record- (8) Record the signal about 10 minutes and rewind the tape. (9) Play back the recorded portion of the test signal. 7-42 DVW-250/250P...
  • Page 217 0.5 sec. (Spec. 3) (5) Put the unit into REC mode at the end portion of BCT- D124L cassette. (6) Perform steps (2) to (4), and check the start-up time of the waveform. 7-43 DVW-250/250P...
  • Page 218 If the specifications 1 and 2 are not met for two kind of head-to-tape contact checks, perform the adjustment from “7-2-5. S1 Guide Slantness Adjustment” and later. If the specification at the exit side is not met, perform the adjustment from “7-2-8. T1 Guide Slantness Adjustment” and later. 7-44 DVW-250/250P...

  • Page 219: Tape Running Check

    S4 guide, S3 guide, S2 guide and lead of the drum. If tape curl occurs by all means, the tape curl shown in the table below is acceptable. If not, perform the adjustment from “7-2-1. S3/S5 Tape Guide Height Adjustment”.) 7-45 DVW-250/250P...
  • Page 220 (1) Put into the REW mode at the end portion of BCT- D124L. (2) Check the tape curl as the same manner of step (2) in 4. If not, perform the adjustment from “7-2-1. S3/S5 Tape Guide Height Adjustment”.) 7-46 DVW-250/250P...
  • Page 221 *1: Tape curl at the center of tape wrap is not acceptable. *2: Tape curl should be disappeared within 1 sec. when the mode change is performed from each mode to PLAY. Upper frange The tape curl is less than 1/10 of the tape width. Curl Tape 7-47 DVW-250/250P...
  • Page 222 *1: Tape curl at the center of tape wrap is not acceptable. *2: Tape curl should be disappeared within 1 sec. when the mode change is performed from each mode to PLAY. The tape curl is less than 1/10 Upper frange of the tape width. Curl Tape 7-48 DVW-250/250P...
  • Page 223 If not, Perform the steps 10) and later. (4) Put into the REV SEARCH mode, and after 2 or 3 seconds put into the PLAY mode. Check that the specification is met. If not, perform the adjustment from “7-2-11. T3 Guide Height Adjustment”.) 7-49 DVW-250/250P...

  • Page 224: Locking Compound Applying

    • Fixing screw of S3 guide Locking compound Set screw Locking compound 3. CUE head assembly • Height adjustment nut • TC head position adjustment screws (2 pcs) • CUE head mounting screws (2 pcs) • Azimuth/Zenith adjustment screw 7-50 DVW-250/250P...

  • Page 225: Mechanical Alignment

    3. Set the S-TEN adjusting table on the horizontal board so that the table leaves a fit space. 4. Open the battery lid on the left side panel. 5. Lay the DVW-250/250P on the S-TEN adjusting table left side down. 6. Connect an digital volt meter.
  • Page 226 (1) Hook the S-tension weight (W44) to the tension regurator guide (S5 guide). (2) Push down the S-tension arm until it is stopped. (3) And release the S-tension arm softly. (4) Swing the S-tension weight, and then quiet it using a S-tension weight finger softly. (W44) 7-52 DVW-250/250P...
  • Page 227 Spec. 2.23 ±0.02 V (Digital volt meter) If it does not meet the specificasion, perform the “Spring position adjustment” of step 3. (6) Remove the S-tension weight (W76.7). Variable resistor "VR402" 7-53 DVW-250/250P...
  • Page 228 S side meter meets the specifi- casion . Spec. 0.76 to 0.87 X10 N•m (74 to 85 gf•cm) If it does not meet, carry out the first step and the laters again. S side FWD back tension measuring cassette 7-54 DVW-250/250P...

  • Page 229: Replacement Of Circuit Boards

    Refer to Maintenance Manual Part2 Volume1 Section4, (R). when replacing the boards not listed in this table. 3. Disconnect the connectors CN206 through CN208 on the DPR-62 board. CN207 CN206 Holder(L) CN208 Holder(R) Screw (PWH 3 × 6) Screw (PWH 3 × 6) DPR-62 board DVW-250...
  • Page 230 5. Disconnect the connectors CN209 and CN210 on the 1. Open the video boards assembly. VPR-12 board. 2. Disconnect the coaxial cables CN251 through CN254 on the DIF-31 board. VPR-12 board CN253(orange) CN252(black) CN254(yellow) CN251(red) CN210 CN209 DVW-250...

  • Page 231: Board Removal

    CN908 through CN911. 2. Disconnect the coaxial cables CN251 through CN254. 3. Remove the two screws and disconnect the board-to- board connector CN205. Screws(PWH2.6 × 5) CN205 Hexagon DIF-31 board wrench DPR-62 board Hexagon wrench Cord Screw DVW-250...

  • Page 232: Board Removal

    (PWH2.6 × 5) board-to-board connectors CN201 through CN204. 4. Attach the holder (L) and holder (R) to a new DPR-62 board. VPR-12 board Hexagon wrench CN201 CN202 CN203 CN204 Hexagon wrench DVW-250...

  • Page 233: Board Removal

    CN106, and CN108 through CN113 on the SST-3 board. CN111 CN108 CN104 CN112 CN101 CN103 CN113 CN106 CN109 CN110 SST-3 board CN105 CN114 CN107 CN102 SST-3 board 3. Remove the six screws fixing the SST-3 board. Screws (PWH2.6 × 5) Screws (PWH2.6 × 5) DVW-250...

  • Page 234: Board Removal

    Hexagon wrench 4. Slide the KY-315 board in the direction indicated by the arrow. 5. Disconnect the connectors CN461 through CN463 while removing the KY-315 board. CN461 Screw (PWH2.6 × 5) CN462 CN463 Screw KY-315 board (PWH2.6 × 5) DVW-250...

  • Page 235: Board Removal

    8. Remove one screw and remove the fixed board plate. 9. Remove the ADA-44 board from the unit by sliding it Nuts in the direction indicate by the arrow. Control knobs Switch cushion Fixed board plate Screw (PWH2.6 × 5) ADA-44 board DVW-250...

  • Page 236: Board Replacement

    CN906 and CN907. CN906 EQ-54 board CN907 Note During Installation • When connecting the harness to CN304 on the EQ-48 board, twist the connection harness five turns or more, and connect it to CN304. DVW-250...

  • Page 237: Electrical Alignment

    Put the unit into STOP mode. 9-1-2. Equipment/Fixtures Equipment Model AC Adapter or Battery Sony AC-550 (for UC) /550CE (for SY) or equivalent Oscilloscope Tektronix 2465B or equivalent Analog Composite Signal Generator Tektronix 1410 (for NTSC) /1411 (for PAL) or equivalent...

  • Page 238: Initial Settings For Switches

    Example: Correction value = -0.5 dB Output level = 0 dB -0.5 dB = -0.5 dB *2: When this tape is reproduced in the audio frequency responce check or adjustment, the output level should be corrected according to the correction value. DVW-250/250P...

  • Page 239: Adjustment After Replacement Of Boards And/Or Blocks

    *1: After the lithium battery/SST-3 is replaced, it is necessary to restore the RF parameters as follows. 1. On the DIAG menu, set PAGE and ITEM as follows. PAGE : <TEST><RF><NV-RAM> ITEM : LOAD 2. Push the SET button on the front panel. DVW-250/250P...

  • Page 240: Power/Control System Adjustment

    Equipment 3. When this initialize is completed, the “INITIALIZED” : TP6 (B-8) /SST-3 Test point message is displayed on the audio meter LCD. : E6 (H-5) /SST-3 Adjustment point : 1RV2 (B-7) /SST-3 : -8.5 ±0.1 V dc Specification DVW-250/250P...

  • Page 241: Click Position Correction Of Tracking Volume

    If the “ADJUST INCOMPLETE” message is dis- played, Check the circuit (SST-3 board) relevant to 4. When this adjustment is completed, the “ADJUST capstan motor. COMPLETE” message is displayed on the audio meter LCD. RV401 SST-3 Board A side DVW-250/250P...

  • Page 242: Capstan Free Speed Adjustment

    PAGE : <TEST><TTP><ADJUST/NVRAM> <ADJUST> ITEM : DRUM PHASE 9. Adjust the time A to meet the following specification by pressing the UP/DOWN button. : A = 3.0 ±1.0 µs Specification TP10(REC A) 0.5 mV/DIV TP8(CF) 5 V/DIV 10. Eject the tape. DVW-250/250P...

  • Page 243: Save The Servo Data

    The “SAVING..” message is displayed on the audio meter LCD. 3. When this saving is completed, the “DATA SAVED” S700 message is displayed on the audio meter LCD. EQ-54 Board A side RV401 SST-3 Board A side TP10 MB-601 Board A side DVW-250/250P...

  • Page 244: Audio System Adjustment

    3. Setting after adjustment 4. Setting after adjustment • AUDIO PB LEVEL knob (CH-1 through CH-4) / Reset switches and menu to the former positions. front panel → reference level position (+4 dBm) • Reset switches and menu to the former positions. DVW-250/250P...

  • Page 245: Dc Offset Adjustment

    1RV6 (L-2 : B) TP1400 CH-3 TP1001 (J-2 : B) – 1RV7 (L-2 : B) CH-4 TP1001 (J-2 : B) 1RV8 (L-2 : B) DPR-62 Board B side RV207 RV205 RV203 RV204 RV201 RV208 RV206 RV202 ADA-44 Board B side DVW-250/250P...

  • Page 246: Cue Erase Current Adjustment

    - 03 : 24 : 29) of the alignment tape. : Audio Analyzer Equipment : AUDIO OUT CH-4 connector on Test point the connector panel Adjustment point : 1RV802 (G-1 : B) /EQ-54 : A ±0.7 dBm (600 Ω) Specification TP961 LV961 E801 SST-3 Board A side 9-10 DVW-250/250P...

  • Page 247: Cue Bias Adjustment

    : Check that the level is 1.8 Vp-p or Specification less. 1.8 Vp-p or less 4. Repeat steps 2 and 3 until the specifications (steps 2 and 3) are met. TP804 RV803 TP805 CV800 RV801 RV802 TP803 EQ-54 Board A side EQ-54 Board B side 9-11 DVW-250/250P...

  • Page 248: Cue Rec Level Adjustment

    Reset switches to the former positions. : AUDIO IN CH-4 connector on Test point the connector panel : 1 kHz, -4.0 ±0.1 dBu Specification 5. Insert a blank tape, and record the signal about 10 seconds. 9-12 DVW-250/250P...
  • Page 249 9-4. Audio System Adjustment CV800 EQ-54 Board A side TP804 CV800 RV800 EQ-54 Board B side 9-13 DVW-250/250P...

  • Page 250: Rf System Adjustment

    9-5-13. Path Adjustment. Save the Save the (Refer to Section 7.) Adjustment Data Adjustment Data RV401 (A-4) /SST-3 → Mechanical center (click point) 9-5-15. 9-5-15. (Tracking control Setting after RF Setting after RF volume) Adjustment Adjustment FINISH FINISH 9-14 DVW-250/250P...
  • Page 251 When RF adjustment is completed, save the adjustment data certainly. (Refer to Section 9-5-13.) S151 If the adjustment is finished without saving data, data is returned to the former condition. RV401 S700 EQ-54 Board A side SST-3 Board A side 9-15 DVW-250/250P...

  • Page 252: Rf Parameter Initialize

    7. Check the B/F, C/G, D/H channels in the same way. : TP100 (B-1:B) /EQ-54 4. Test point 8. Out of the DIAG menu. TP102 (B-2:B) /EQ-54 Adjustment point : 1RV101 (A-1:B) /EQ-54 : Make the cross-point to straight line. Specification S151 SST-3 Board A side 9-16 DVW-250/250P...

  • Page 253: Pll Adjustment

    5. Connect the harness to CN301 (A-1) and CN303 (D-1) connectors on the EQ-54 board. TP400 TP300 TP200 TP100 RV101 S700 RV401 RV301 RV201 TP402 TP302 TP202 TP102 RV403 RV203 RV303 RV103 TP405 TP305 TP205 TP105 EQ-54 Board B side EQ-54 Board A side 9-17 DVW-250/250P...

  • Page 254: Phase Adjustment

    1RV304 (C-3:B) D/Hch 1RV404 (E-3:B) Test point TRIG Adjustment point B/Fch TP204 (C-3:B) TP205 (C-3:B) 1RV200 (B-2:B) 6. Eject the tape. C/Gch TP304 (D-3:B) TP305 (D-3:B) 1RV300 (D-2:B) D/Hch TP404 (F-3:B) TP405 (E-3:B) 1RV400 (E-2:B) 4. Eject the tape. 9-18 DVW-250/250P...

  • Page 255: Adc Sampling Phase Adjustment

    : A = 0 ±2 ns Specification RV400 RV300 RV200 RV100 CV400 CV300 CV200 CV100 TP104 TP304 TP204 TP404 RV104 RV404 RV204 RV304 TP405 TP305 TP205 TP105 EQ-54 Board B side TP11 TP13 TP12 MB-601 Board A side 9-19 DVW-250/250P...

  • Page 256: Equalizer (Amp) Adjustment

    Ach: xx Ech: xx EXIT Perform the manual adjustment of A/Ech AMP data when the specification is not met. (Refer to “9-5-14. Manual Adjustment.”) 7. Check the B/F, C/G, D/H channels in the same way. 8. Eject the tape. 9-20 DVW-250/250P...

  • Page 257: Equalizer (Phase) Adjustment

    Ech: xx EXIT 4. When the automatic adjustment is completed, the following message is indicated. 3. Check the B/F, C/G, D/H channels in the same way. SET * YES 5. Push the SET button on the front panel. 9-21 DVW-250/250P...
  • Page 258 4. Check the B/F, C/G, D/H channels in the same way. 9-5-13. Save the Adjustment Data 1. On the DIAG menu, set PAGE and ITEM as follows. PAGE : <TEST><RF><NV-RAM> ITEM : SAVE 2. Press the SET button. 9-22 DVW-250/250P...

  • Page 259: Self Rec/Pb Channel Condition Check

    6. Check the channel conditions (REC CONFI, Align- ment Tape Playback) of the nonconforming channels. (Refer to Sections 9-5-10 and 9-5-12.) 7. Repeat the steps 5 and 6 until the following specifica- tion is met. Specification : Only leftmost square on the LCD lights up. 9-23 DVW-250/250P...

  • Page 260: Setting After Rf Adjustment

    Adjustment point : 1RV300 (A-3 : B) /DIF-31 : 27.0 ±0.1 MHz Specification 3. Setting after adjustment Reset switches and menu to the former positions. SST-3 Board A side S700 TP101 RV100 RV300 S300 TP301 DIF-31 Board B side EQ-54 Board A side 9-24 DVW-250/250P...

  • Page 261: Video System Adjustment-2

    : <VIDEO 2> Test point : VIDEO LEVEL → 0.0% ITEM connector panel Adjustment point : 1RV202 (F-1)/VPR-12 : 0 ±3 mV PAGE : <VIDEO 2> Specification : SDI OUT → ON ITEM RV202 TP203 VPR-12 Board A side 9-25 DVW-250/250P...

  • Page 262: Composite Input Level Adjustment

    3. Adjust the level B to meet the following specification by pressing the UP and/or DOWN button on the front panel. A = 714 ±7 mV p-p (for NTSC) A = 700 ±7 mV p-p (for PAL) [For NTSC] [For PAL] 9-26 DVW-250/250P...

  • Page 263: Camera Return Video Level Adjustment

    : A = 714 ±7 mV p-p (for NTSC) Specification A = 700 ±7 mV p-p (for PAL) [For NTSC] RV201 RV200 TP208 [For PAL] 2. Setting after adjustment Reset switches to the former positions. (MODE switch/connector panel → PB/EE) VPR-12 Board A side 9-27 DVW-250/250P...

  • Page 265: Spare Parts

    Therefore, specified parts should be used in the case of replacement. 2. Standardization of Parts Some repair parts supplied by Sony differ from those used for the unit. These are because of parts common- ality and improvement. Parts list has the present standardized spare parts.

  • Page 266: Exploded Views

    A-8269-262-B s DRUM, DJH-11A-R [for NTSC] A-8269-452-A o ARM ASSY, S X-3949-109-1 s ROLLER ASSY, AHC X-3678-389-3 s S-TEN ROLLER ASSY 1-454-334-61 s SOLENOID, PLUNGER 1-454-607-21 s SOLENOID, PLUNGER 3-172-003-01 s BELT, DRIVING 8-825-779-72 s CTL HEAD (PS244-21D) 3-615-320-01 o CAP, CR 10-2 DVW-250/250P...
  • Page 267 X-3605-481-2 o SUB ASSY, T ARM X-3678-425-5 s ARM ASSY, PINCH ROLLER 1-454-334-61 s SOLENOID, PLUNGER 1-454-383-31 s SOLENOID, PLUNGER 3-172-003-01 s BELT, DRIVING 3-681-778-02 s BRUSH, CUE 8-825-920-02 s HEAD, AUDIO EPS244-2103J 8-835-440-01 s MOTOR DN20-Q7Z1B 8-835-534-01 s MOTOR, DC SCV-0702A/J-N 10-3 DVW-250/250P...
  • Page 268 A-8276-934-A o MOUNTED CIRCUIT BOARD, CP-260 [for UC,SY] A-8276-936-A o MOUNTED CIRCUIT BOARD, CP-260J [for J] A-8276-938-A o MOUNTED CIRCUIT BOARD, FU-63 A-8276-948-A o MOUNTED CIRCUIT BOARD, KY-315 [for NTSC] A-8276-950-A o MOUNTED CIRCUIT BOARD, KY-315P [for PAL] 10-4 DVW-250/250P...
  • Page 269 A-8276-942-A o MOUNTED CIRCUIT BOARD, VPR-12P [for PAL] A-8276-922-A o MOUNTED CIRCUIT BOARD, EQ-54 A-8276-928-A o MOUNTED CIRCUIT BOARD, DIF-31 A-8276-944-A o MOUNTED CIRCUIT BOARD, DPR-62 [for NTSC] A-8276-946-A o MOUNTED CIRCUIT BOARD, DPR-62P [for PAL] 1-528-292-11 s BATTERY, SUPER LITHIUM ER6CN4 10-5 DVW-250/250P...
  • Page 271 The material contained in this manual consists of information that is the property of Sony Corporation and is intended solely for use by the purchasers of the equipment described in this manual. Sony Corporation expressly prohibits the duplication of any portion of this manual or the use thereof for any...
  • Page 272 Printed in Japan DVW-250P (SY) Sony Corporation 2001. 6 08 DVW-250 (UC) E B&P Company ©1995 3-188-730-03...

This manual is also suitable for:

Dvw-250p

Table of Contents