Table of Contents
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SERVICE MANUAL
VIDEO CASSETTE RECORDER
HR-J691U/J694U/J695U/J698U
SPECIFICATIONS
GENERAL
Power requirement
: AC 120 V
Power consumption
Power on
: 13 W
Power off
: 1.5 W
Temperature
Operating
: 5°C to 40°C (41°F to 104°F)
Storage
: –20°C to 60°C (–4°F to 140°F)
Operating position
: Horizontal only
Dimensions (W x H x D) : 435 mm x 94 mm x 247 mm
(17-1/4" x 3-3/4" x 9-3/4")
Weight
: 2.7 kg (6.6 lbs)
Format
: VHS NTSC standard
Maximum recording time
SP
: 210 min. with ST-210 video cassette
EP
: 630 min. with ST-210 video cassette
VIDEO/AUDIO
Signal system
: NTSC-type color signal and EIA
monochrome signal, 525 lines/
60 fields
Recording/Playback
: DA-4 (Double Azimuth) head helical
system
scan system
Signal-to-noise ratio
: 45 dB
Horizontal resolution
: 230 lines
Frequency range
Normal audio
: 70 Hz to 10,000 Hz
Hi-Fi audio
: 20 Hz to 20,000 Hz
Input/Output
: RCA connectors (IN x 1, OUT x 1)
(The specifications shown pertain specifically to the model HR-J698U.)
, 60 Hz
d
This service manual is printed on 100% recycled paper.
COPYRIGHT © 2002 VICTOR COMPANY OF JAPAN, LTD
TUNER
Tuning system
: Frequency-synthesized tuner
Channel coverage
VHF
: Channels 2–13
UHF
: Channels 14–69
CATV
: 113 Channels
RF output
: Channel 3, 4 or – (off) (preset to
Channel 3 when shipped) 75 ohms,
unbalanced
TIMER
Clock reference
: Quartz
Program capacity
: 1-year programmable timer/
8 programs
ACCESSORIES
Provided accessories
: RF cable (F-type),
Infrared remote control unit,
"AA" battery x 2
Specifications shown are for SP mode unless specified otherwise.
E. & O.E. Design and specifications subject to change without
notice.
HR-J691U/J691U(C)/J694U/J695U(C)/J698U(C)
V15D1
No.82904
January 2002
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Table of Contents
Related Manuals for JVC HR-J691U
Summary of Contents for JVC HR-J691U
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Page 1: Specifications
SERVICE MANUAL VIDEO CASSETTE RECORDER HR-J691U/J694U/J695U/J698U SPECIFICATIONS (The specifications shown pertain specifically to the model HR-J698U.) TUNER GENERAL Tuning system : Frequency-synthesized tuner Power requirement : AC 120 V , 60 Hz Channel coverage Power consumption : Channels 2–13 Power on : 13 W : Channels 14–69... -
Page 3: Table Of Contents
3.2.4 A/C head phase(X-value) ........3-3 3.3 Electrical Adjustment ............ 3-4 3.3.1 Servo circuit ............3-4 3.3.1.1 Switching point ........... 3-4 The following table lists the differing points between models HR-J691U, J691U(C), J694U, J695U(C) and J698U(C). MODEL HR-J691U HR-J691U(C) HR-J694U... -
Page 4: Important Safety Precautions
Important Safety Precautions Prior to shipment from the factory, JVC products are strictly inspected to conform with the recognized product safety and electrical codes of the countries in which they are to be sold. However, in order to maintain such compliance, it is equally important to implement the following precautions when a set is being serviced. -
Page 5: Safety Check After Servicing
Safety Check after Servicing Examine the area surrounding the repaired location for damage or deterioration. Observe that screws, parts and wires have been returned to original positions, Afterwards, perform the following tests and confirm the specified values in order to verify compli- ance with safety standards. -
Page 7: Disassembly
SECTION 1 DISASSEMBLY In case of mechanical failures, while keeping the tension 1.1 Manually removing the cassette tape arm assembly free from tension, pull out the tape on the If you cannot remove the cassette tape which is loaded be- pole base assembly. -
Page 8: Removing The Major Parts
1.2 Removing the major parts 1.2.1 How to read the procedure table This table shows the steps for disassembly of the externally Door opener furnished parts and board assemblies. Reverse these steps when re-assembling them. Switch Side lever <Example> frame(R) Switch knob Step/... - Page 9 (S1a) Drum Shield (S3f) Drum assembly <Note 3d> (S3a) FFC WIRE remove from the A/C HEAD <Note 3b> BASE and put MECHA UNIT on CHASSIS. (WR3a) (S2a) <Note 3a> Top cover (S3b) <Note 3b> NOTE) HANG THE HOOK OF THE Mechanism TOP COVER IN HOLD OF CHASSIS.
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Page 10: Emergency Display Function
1.3 Emergency dispaly function This unit saves details of the last two emergencies as the EMG 0 : 00 : 00 Normal display (Counter or clock) history and allows the status of the VCR and the mechanism of each emergency to be shown both on the display and as EMG content display (E:Latest:Previous) See 1.3.4. -
Page 11: Details Of The Osd Display In The Emg Display Mode
ROM No. tially different from the mechanism sensor information in EMG detail information <1>. A A : Key code (JVC code) [For MN* only] B B : Deck operation mode (See EMG detail information <1>.) C C : Mechanism operation mode (See EMG detail information <1>.) D D : Sensor information (See sensor information details.) -
Page 12: Emg Content Description
1.3.4 EMG content description Note: EMG contents “E08/E09” are for the model with Dynamic Drum (DD). CONTENT CAUSE E01: Loading EMG If the mechanism mode does not change to the next mode within 4 sec- 1. The mechanism is locked in the middle of the mode transition during a tape loading operation. onds after the loading motor starts rotating in the loading direction, while 2. -
Page 13: Emg Detail Information<1
1.3.5 EMG detail information <1> * 2 : Mechanism operation mode [Table of MN*] The status (electrical operation mode) of the VCR and the status (mechanism operation mode/sensor information) of the mechanism Display Mechanism operation mode Command standby (No command to be executed) in the latest EMG can be confirmed based on the figure in EMG Immediate Power OFF after EMG occurrence detail information <1>... -
Page 14: Emg Detail Information<2
3– : Mechanism sensor information * 5 : Cassette tape type <1> [Common table of MN* and HD*] Display Cassette tape type <1> Mechanism sensor information Display Cassette type not identified Mechansim Start sensor End sensor REC safety SW position sensor Large reel/small reel (T-0 to T-15/T-130 to T-210) not classified Small reel, thick tape (T-120) identified/thin tape (T-140) identified Tab broken... -
Page 15: Service Position
1.4 Service position Jig RCU mode This unit has been designed so that the Mechanism and Main This unit uses the following two modes for receiving remote control codes. board assemblies can be removed together from the chassis assembly. Before diagnosing or servicing the circuit boards, 1) User RCU mode : Ordinary mode for use by the user. -
Page 16: Maintenance And Inspection
1.7.3 Suggested servicing schedule for main components 1.7 Maintenance and inspection The following table indicates the suggested period for such 1.7.1 Cleaning service measures as cleaning, lubrication and replacement. In Regular cleaning of the transport system parts is desirable but practice, the indicated periods will vary widely according to en- practically impossible. -
Page 17: Disassembling/Assembling Of Mechanism
SECTION 2 DISASSEMBLING/ASSEMBLING OF MECHANISM 1. Before disassembling/assembling 1.3 Setting the mechanism assembling mode The mechanism-assembling mode is provided with this mecha- 1.1 Notes nism. When disassembling and assembling, it is required to This model’s mechanism relates closely to the rotary encoder engage this mode. -
Page 18: Layout Of The Main Mechanism Parts
1.4 Layout of the main mechanism parts Pole base assy T4 Main brake assy T3 A/C head (take-up Side) (take-up side) Pinch roller arm assy Full erase head Lid guide Pole base assy (supply side) T7 Guide arm assy T8 Brake lever Tension arm assy T9 Drive lever Tension arm base... -
Page 19: Disassembling Procedure Table
1.5 Disassembling procedure table This table shows the order of parts removal when replacing each part. For replacement, remove the parts in the order of 1 to 18 shown in the table and install the parts in the reverse order. The symbol number before each part name shows the number in the figure “Layout of the main mechanism parts”. -
Page 20: Replacement Of The Main Mechanism Parts
2. Replacement of the main mechanism parts 2.1.3 Disassembling (1) Release hook (a) to remove the earth spring (1) from the 2.1 Cassette holder top frame. 2.1.1 Removal (2) Release the catches (a) and (b) and pull the top frame in the direction shown by the arrow (a) to remove it. -
Page 21: A/C Head
2.2 A/C head Screw (b) 2.2.1 Removal SIDE FRAME(R) (1) Remove screws (a) and (b). (2) Remove the A/C head together with the head base. (3) Remove the screws (c), (d) and (e) to remove the spring (a) and the A/C head from the HEAD BASE. Section (a) Screw (e) DRIVE LEVER... -
Page 22: Guide Arm, Pinch Roller Arm
2.3 Guide arm, pinch roller arm 2.4 Idler arm, idler gear 1/2 2.3.1 Removal 2.4.1 Removal (1) Remove the spring (a) from the hook (a) and detach the (1) Release the catches (a) and (b) to detach the idler arm. guide arm assembly. -
Page 23: Press Lever, Control Cam, Capstan Brake Assembly, Loading Motor Assembly
2.6 Press lever, control cam, capstan brake assembly, loading motor assembly Tension arm assembly Spring (b) Main brake (T) assembly Catch (d) 2.6.1 Removal Catch (c) Section (b) Spring (a) BRAKE (1) Remove the slit washer (a) to detach the press lever. Spring (a) LEVER (2) Release the slit washer (b) to detach the control cam. -
Page 24: Capstan Motor, Load Gear, Control Plate
2.6.2 Installation (phase adjustment) 2.7 Capstan motor, load gear, control plate (1) Attach the loading motor assembly to the main deck. 2.7.1 Removal (2) Secure the screw (a). (1) Detach the belt. (3) Solder the wire to section (a). (2) Check that the FFC connector on the drum is disconnected. (4) Arrange the wire along with the position guide (b). -
Page 25: Clutch Unit Assembly, Direct Gear
2.7.2 Installation (phase adjustment) 2.8 Clutch unit assembly, direct gear (1) Place the main deck on the guide hole (a) of the tension arm 2.8.1 Removal lever. (1) Remove the slit washer (a) to detach the clutch unit assem- (2) Place the main deck on the guide hole (b) of the brake le- bly. -
Page 26: Mechanism Timing Chart
3. Mechanism timing chart REEL MECHANISM MODE SERCH SLOW EJECT PLAY STOP BRAKE /REW /STILL /SLOW /STILL CONTROL PLATE B FR MARK POLE BASE LOCK REEL LOCK FREE TENSION ARM PLAY TENSION STOP FF/REW ARM LEVER (STOP MODE PRESS UP) BRAKE LEVER GUIDE ARM... -
Page 27: Adjustment
SECTION 3 ADJUSTMENT Precaution 3.1.4 Switch settings When adjusting this unit, set the VCR mode and switches • The adjustments of this unit include the mechanism as described below. compatibility and electrical adjustments. During the performance of this work, be sure to observe the pre- •... -
Page 28: Mechanism Compatibility Adjustment
3.2 Mechanism compatibility adjustment (1) Play back the alignment tape (A1). (2) Apply the external trigger signal to D.FF (E), to observe Notes: the V.PB FM waveform at the measuring point (D). • Although compatibility adjustment is very important, it is not (3) Set the VCR to the manual tracking mode. -
Page 29: Height And Tilt Of The A/C Head
3.2.3 Height and tilt of the A/C head 3.2.4 A/C head phase (X-value) Note: • Signal (A1) Alignment tape(SP, stairstep, NTSC) [MHP] • Set a temporary level of the height of the A/C head in • (A2) Alignment tape(EP, stairstep, NTSC) [MHP-L] advance to make the adjustment easier after the A/C •... -
Page 30: Electrical Adjustment
Electrical Adjustment Note: The following adjustment procedures are not only necessary after replacement of consumable mechanical parts or board assemblies, but are also provided as references to be re- ferred to when servicing the electrical circuitry. In case of trouble with the electrical circuitry, always begin a service by identifying the defective points by using the meas- uring instruments as described in the following electrical ad- justment procedures. - Page 32 JVC SERVICE & ENGINEERING COMPANY OF AMERICA DIVISION OF JVC AMERICAS CORP. Head office (973)317-5000 1700 Valley Road Wayne, New Jersey 07470-9976 10 New Maple Avenue Pine Brook, New Jersey 07058-9641 (973)396-1000 East Coast 705 Enterprise Street Aurora, Illinois 60504-8149...
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Page 33: Charts And Diagrams
SECTION 4 CHARTS AND DIAGRAMS NOTES OF SCHEMATIC DIAGRAM 4) Indication on schematic diagram Voltage Indications for REC and PB mode on the sche- matic diagram are as shown below. Safety precautions The Components identified by the symbol critical for safety. For continued safety, replace safety critical components only with manufacturer's recom- REC mode mended parts. - Page 34 6. Signal path Symbols CIRCUIT BOARD NOTES The arrows indicate the signal path as follows. 1. Foil and Component sides 1) Foil side (B side) : Playback signal path Parts on the foil side seen from foil face (pattern face) are indicated.
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Page 35: Board Interconnections
Note : The Parts Number , value and rated voltage etc. in the Schematic Diagram are for references only. BOARD INTERCONNECTIONS When replacing the parts , refer to the Parts List. AC INPUT FRONT VIDEO FRONT AUDIO REAR VIDEO REAR AUDIO ANT IN ANT OUT IN[L]... -
Page 36: Main(Video/N.audio) Schematic Diagram
Note : The Parts Number , value and rated voltage etc. in the Schematic Diagram are for references only. MAIN (VIDEO/N.AUDIO) SCHEMATIC DIAGRAM When replacing the parts , refer to the Parts List. 3 MAIN(VIDEO/N.AUDIO) TO FMA/DEMOD NA_PB NA_REC RF_AUDIO F.AUDIO[R] F.AUDIO[L] LINE_OUT[R]... -
Page 37: Main(Syscon) Schematic Diagram
Note : The Parts Number , value and rated voltage etc. in the Schematic Diagram are for references only. MAIN (SYSCON) SCHEMATIC DIAGRAM When replacing the parts , refer to the Parts List. MAIN[SYSCON] CP3002 CAP_MDA QMFZ050-1R5X-E C3071 CN3001 CP3001 NMFZ012-1R0X-M C.FG_IN CAP.M_Vcc... -
Page 38: Main(Sw.reg) Schematic Diagram
Note : The Parts Number , value and rated voltage etc. in the Schematic Diagram are for references only. MAIN (SW.REG) SCHEMATIC DIAGRAM When replacing the parts , refer to the Parts List. D5210 AU01Z MAIN[SW.REG] 1SR153-400 TO SYSCON T5001 ERA18-02 QQS0083-001 10ELS2... -
Page 39: Main(Tuner) Schematic Diagram
Note : The Parts Number , value and rated voltage etc. in the Schematic Diagram are for references only. MAIN (TUNER) SCHEMATIC DIAGRAM When replacing the parts , refer to the Parts List. 0 3 TUNER[MAIN] TU6001 MATSUSHITA ANT IN ANT OUT NTSC NC(GND) -
Page 40: Main(Fma/Demod) Schematic Diagram
Note : The Parts Number , value and rated voltage etc. in the Schematic Diagram are for references only. MAIN (FMA/DEMOD) SCHEMATIC DIAGRAM When replacing the parts , refer to the Parts List. MAIN(FMA/DEMOD) C2222 0.01 TO SW.REG SW5V SW12V C6504 C2230 C2209... -
Page 41: Main(Front) Schematic Diagram
Note : The Parts Number , value and rated voltage etc. in the Schematic Diagram are for references only. MAIN (FRONT) SCHEMATIC DIAGRAM When replacing the parts , refer to the Parts List. MAIN[FRONT] SYSCON AL5V Q7001 DIG1 DIG2 Q7002 DIG3 DTA143TUA-X DI7001... -
Page 42: Main(Terminal) Schematic Diagram
4.8 MAIN (TERMINAL) SCHEMATIC DIAGRAM COMPONENTPARTSLOCATIONGUIDE<MAIN> LPB10159-001D Note : The Parts Number , value and rated voltage etc. in the Schematic Diagram are for references only. REF.NO. LOCATION REF.NO. LOCATION REF.NO. LOCATION REF.NO. LOCATION REF.NO. LOCATION When replacing the parts , refer to the Parts List. CAPASISTOR C3025 B C 7C... -
Page 43: Main Circuit Board
MAIN CIRCUIT BOARD CAUTION : <03> MAIN DANGEROUS VOLTAGE FOR CONTINUED PROTECTION AGAINST FIRE HAZARD, REPLACE ONLY WITH SAME TYPE AND RATED FUSE(S). LPB10159-001D ATTENTION : REPLACER PAR DES FUSIBLE DE MEME TYPE. Q2002 R2015 LIVE C2009 R2016 C2006 AV OUT Q2003 C2011 F5001... -
Page 44: Remote Controller Scematic Diagram
4.10 REMOTE CONTROLLER SCHEMATIC DIAGRAM 4.12 WAVEFORMS < SYSCON > CN3001-1 CN3001-11 TP4001 IC3001-74 IC3001-49 IC3001-47 (LP20878-001#, 020#) CAP_M_FG D. PG/FG CTL.P CTL_+ V_TO_OSD VIDEO_OSD_OUT PROG PROG CHECK ENTER/OSD SKIP SEARCH DATE DISPLAY (REC) REC/PB 4.6 Vp-p REC/PB 4.5 Vp-p PB 2.7 Vp-p REC 4.0 Vp-p REC/PB 2.2 Vp-p... -
Page 45: Voltage Charts
4.13 VOLTAGE CHARTS 4.14 CPU PIN FUNCTION <MAIN> MODE MODE MODE MODE PLAY PLAY PLAY PLAY PIN NO. PIN NO. PIN NO. PIN NO. <SYSCON IC3001> IC2201 PIN NO. LABEL IN/OUT FUNCTION PIN NO. LABEL IN/OUT FUNCTION SP_FG DETECTION SIGNAL FOR SUPPLY REEL ROTATION/TAPE REMAIN VDD2 SYSTEM POWER DETECTION SIGNAL FOR TAKE-UP REEL ROTATION/TAPE REMAIN... -
Page 46: System Control Block Diagram
( RESET ) PHOTO TU FG SENSOR MODEL MODEL MODEL MODELS OPTION 1 OPTION 2 OPTION 3 JS3001 HR-J691U, J691U(C), J694U ROTARY MODEL_OPTION_1 HR-J698U(C)(with A/B code) TO TUNER HR-J695U(C)(with child lock) ENCODER MODEL_OPTION_2 I2C DATA for future model for future model... -
Page 47: Video Block Diagram
4.16 VIDEO BLOCK DIAGRAM MAIN ( VIDEO, TERMINAL ) SYSCON V.PULSE V TO OSD I2C DATA A/V I2C CLK A/V V FROM OSD TP106 PB.FM VIDEO & AUDIO SIGNAL PROCESSOR ) USED USED USED USED Q901 X-tal Det. VCO/OSC 2fsc TP111 2fsc D.FF... -
Page 48: Audio Block Diagram
REC ON A/C HEAD CN2001 EP ( LP ) ON A. ERASE REC/PB FILTER ( VIDEO/N.AUDIO SIGNAL PROCESSOR ) Note : For the waveforms in this block diagram, refer to page 4-22. 4-29 4-30 E. & O.E No.82904 HR-J691U/J691U(C)/J694U/J695U(C)/J698U(C) (VP)-V15D1... -
Page 49: Parts List
Replace only with specified part numbers. PACKING AND ACCESSORY ASSEMBLY <M1> The instruction manual to be provided with this product will differ according to the destination. ADHESIVE TAPE 306A 316[HR-J691U(C),J695U(C),J698U(C)] 319[HR-J691U(C),J695U(C),J698U(C)] [HR-J691U,J694U] FINAL ASSY <M2> SPEC OF BARCODE REF No. PART No. - Page 50 BEWARE OF BOGUS PARTS Parts that do not meet specifications may cause trouble in regard to safety and per- formance. We recommend that genuine JVC parts be used. NOTE) HANG THE FOOK OF THE TOP COVER IN HOLD OF CHASSIS.
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Page 51: Final Assembly
REF No. PART No. PART NAME, DESCRIPTION REF No. PART No. PART NAME, DESCRIPTION - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -... -
Page 52: Mechanism Assembly
MECHANISM ASSEMBLY <M4> A/C HEAD BOARD ASSY <12> 63 *1 LOADING MOTOR BOARD ASSY <55> Classifi- Symbol in Part No. cation drawing Grease KYODO-SH-JB NOTE:The section marked in AA and BB indicate lubrication and greasing areas. COSMO-HV56... - Page 53 REF No. PART No. PART NAME, DESCRIPTION REF No. PART No. PART NAME, DESCRIPTION - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -...
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Page 54: Electrical Parts List
ELECTRICAL PARTS LIST REF No. PART No. PART NAME, DESCRIPTION REF No. PART No. PART NAME, DESCRIPTION - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -... - Page 55 REF No. PART No. PART NAME, DESCRIPTION REF No. PART No. PART NAME, DESCRIPTION - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -...
- Page 56 REF No. PART No. PART NAME, DESCRIPTION REF No. PART No. PART NAME, DESCRIPTION - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -...
- Page 57 REF No. PART No. PART NAME, DESCRIPTION REF No. PART No. PART NAME, DESCRIPTION - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -...
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Page 58: A/C Head Board Assembly<12
IM BUS WIRE CP4002 QUY153-050Y IM BUS WIRE F5001 QMF51N2-1R25J1 FUSE T1.25A,AC250V ****************************** A/C HEAD BOARD ASSEMBLY <12> LPA10158-01A1 A/C HEAD BOARD ASSY ****************************** LOADING MOTOR BOARD ASSEMBLY <55> LPA10158-01A2 LOADING MOTOR BOARD ASSY E. & O.E No.82904 HR-J691U/J691U(C)/J694U/J695U(C)/J698U(C) (VP) -V15D1 5-10...