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Panasonic NV-SJ420EG Service Manual

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ORDER NO. VRD0103012C2
Video Cassette Recorder
NV-SJ420EG / NV-SJ420EGM / NV-SJ420EGN / NV-
SJ420EGY / NV-SJ420B
Z-MECHANISM
SPECIFICATIONS
2001 Matsushita Electric Industrial Co., Ltd. All rights reserved.
Unauthorized copying and distribution is a violation of law.
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Summary of Contents for Panasonic NV-SJ420EG

  • Page 1 ORDER NO. VRD0103012C2 Video Cassette Recorder NV-SJ420EG / NV-SJ420EGM / NV-SJ420EGN / NV- SJ420EGY / NV-SJ420B Z-MECHANISM SPECIFICATIONS 2001 Matsushita Electric Industrial Co., Ltd. All rights reserved. Unauthorized copying and distribution is a violation of law.

  • Page 2: General Descriptions

    / Please refer to the service manual for Z- Mechanism Chassis. (Order No. VRD9802005C2) 2. The Model No. is indicated on the Schematic Diagram and Circuit Board Diagrams as follows. Model No. Indication Mark NV-SJ420EG/EGM/EGN NV-SJ420EGY NV-SJ420B 2. GENERAL DESCRIPTIONS 2.1. SERVICE CAUTION 2.1.1. REPLACING IC7702/EEPROM When the EEPROM: IC7702 is replaced, applicable model code, option code and electrical adjustment data will not be available.
  • Page 3 STEP2.INPUT THE MODEL & OPTION CODE 1. Set up the applicable model code and option code by ordering the following table. PROCEDURE F.I.P. DISPLAY Turn on the Service Mode 1.Press the FF key and the EJECT key simultaneously for more than 3 seconds. Activate the Service Mode 2 2.While keep placing FF key, press the EJECT key in twice.

  • Page 4: Cylinder Unit Replacement

    Model No. Model Option Option Option Code Code 1 Code 2 Code 3 33 / (21h) 8 / (08h) 244 / 6 / (06h) SJ420EG/ / (F4h) EGM/EGN/ NV-SJ420B 35 / (23h) 40 / (28h) 244 / 5 / (05h) (F4h) Fig.
  • Page 5 2. UPPER CYLINDER DISASSEMBLY A. Remove 2 screws (A). B. Remove the Cylinder Stator Unit. C. Remove 2 screws (B). D. Remove the Cylinder Rotor Unit. E. Loose Hex screw (C) (1.5 mm) and remove the CYLINDER RETAINER. F. Remove the Upper Cylinder. Fig.
  • Page 6 3. UPPER CYLINDER ASSEMBLY When reassembling, perform the steps in the reverse order. Notes: 1. Install the Cylinder Retainer so that the 2 holes on top of the Cylinder Retainer are at right angles with the P3502 Connection. 2. Tighten the Hex screw (C) (1.5 mm) while pressing down on top of the Cylinder Retainer.
  • Page 7 3. Install the Cylinder Rotor Unit so that the inner hole of the Cylinder Rotor Unit fits to the small projection (D) on top of the Upper Cylinder. 4. Tighten 2 screws (B). Fig. S6 5. install the Cylinder Stator Unit. 6.

  • Page 8: Removal Of Cassette Tape

    (PAL: VFJ8125H3F) and adjust it if necessary. 2.1.3. CHECKING OF MAIN C.B.A. When servicing the MAIN C.B.A., take out the MAIN C.B.A. and mechanism from the frame and turn over. Fig. S8 2.1.4. FLAT CARD CABLE INSTALLATION When installing the Flat Card Cable on the connector, install the Flat Card Cable with the cable contacts facing the connector contacts.
  • Page 9 2.3. INTRODUCTION OF VIDEO HEAD CLEANING CASSETTE / (POLISHING TYPE) 1. We are pleased to introduce Panasonic Video Head Cleaning Cassette, VFK0923FT [for service purposes] and VFK0923FSE [ for end users] for all VHS/SVHS VCP and VCR. 2. These cleaning cassettes are exclusive removing the hard and sticky clogging on video heads.
  • Page 10 VFK0923FT (For Service usage) Type of Cassette Full VHS Cassette Cleaning Time 10 Seconds/Time Tape Length 20 m Usability in a Path 180 Times VFK0823FSE (For end users) Type of Cassette Full VHS Cassette Cleaning Time 10 Seconds/Time Tape Length 3.34 m Usability in a Path 30 Times...

  • Page 11: Self-Diagnosis Result Display

    VFK0823FSE (For end users) Note: The tape material itself is the same in both types. 2.4. SELF-DIAGNOSIS RESULT DISPLAY The "SELF-DIAGNOSIS RESULT DISPLAY & MEMORY function is built in this VTR. It means that when the VCR detects undesirable condition, it can be displayed a “Error code (Two numbers from the left)”...

  • Page 12: Adjustment Procedures

    INDICATION CAUSE REMEDY/CHECK After cylinder lock is detected, the cylinder Check the cylinder motor drive circuit. does not start rotating again even after tape unloading. Cassette tape is not wound up during the tape Check the capstan motor drive circuit. unloading except EJECT mode.

  • Page 13: Removal Of The Top Panel

    3.1.2. DETAIL OF DISASSEMBLY METHOD 1. REMOVAL OF THE TOP PANEL Remove 4 Screws (A) Fig.D2 2. REMOVAL OF THE FRONT PANEL UNIT Unlock 7 Tabs (B) Fig. D3...

  • Page 14: Removal Of The Mechanism Unit

    3. REMOVAL OF THE MECHANISM UNIT Remove Screw (C) Remove CYLINDER SHIELD PLATE Remove Screw (D) Remove 3 Screws (E) Remove 2 Screw (F) Note: 1. Keep pressing 2 stoppers on Cassette Holder Plate and Press Cassette Holder Plate to the rear. 2.
  • Page 15 4. REMOVAL OF THE MAIN C.B.A. Remove 4 screws (G) Unlock 4 Tabs (H) Fig. D5 NOTE: Before mounting the MAIN C.B.A. onto the frame, be sure to confirm that the insulation sheet is mounted on the frame as shown in Fig.

  • Page 16: Servicing Position

    Fig. D6 5. SERVICING POSITION Fig. D7 3.2. MECHANICAL ADJUSTMENT PROCEDURES Refer to the Service Manual for Z-Mechanism Chassis. / (Order No. VRD9802005C2) 3.3. ELECTRICAL ADJUSTMENT PROCEDURES 3.3.1. TEST EQUIPMENT The following equipments are required for Electrical Adjustments. 1. Dual-Trace Oscilloscope - Voltage Range: 0.005-5V/div - Frequency Range: DC-35MHz - Probes: 10:1 / 1:1...
  • Page 17 4. Digital Volt Meter (D.V.M.) 5. Video Sweep Generator 6. Sinewave Generator 7. Video Pattern Generator 8. Monitor TV 9. DC Power Supply 10. VHS Blank Tape 11. VHS Alignment Tape - Parts No.: VFJ8125H3F(PAL) 3.3.2. VCR SETTING When no indication in the procedure, set each selector as follows. 1.
  • Page 18 ITEM ADJ. MODE INPUT TAPE M. EQ. SPEC. REMARKS VIDEO / SP/LP/EP / VIDEO / BLANK OSCILLO / SP: 0+-1 Refer to the VIDEO FREQUENCY PLAYBACK SWEEP SCOPE/ / (dB) procedure of TAPE / RESPONSE / (SELF- / (See VIDEO FREQUENCY (90~110%) REC)
  • Page 19 PROCEDURES FIP DISPLAY Press the FF and EJECT Keys simultaneously for 3 seconds. Press the FF and EJECT Keys simultaneously twice. Press the EJECT key for 3 seconds. Press the CH UP key once. Insert the Alignment cassette tape. (PAL:VFJ8125H3F) When the sequence of the automatical adjustment has been terminated, the following action has been made.
  • Page 20 PROCEDURES FIP DISPLAY Press the FF and EJECT Keys simultaneously for 3 seconds. Press the FF and EJECT Keys simultaneously twice. Press the EJECT key for 3 seconds. Press the CH UP key in 3 times. Insert the blank cassette tape. (The adjustment is automatically started.) When the sequence of the automatical adjustment...
  • Page 21 PROCEDURES FIP DISPLAY Connect the Oscilloscope to: *CH1..Video Out (TW3002). *CH2..V.FREQ.(TW6002) Press the "4" key on the remote controller. (Confirm that TW6002 becomes high(5V)). Adjust the Frequency response by pressing the "2"(increase) and/or "8"(decrease) key on the Remote Controller. (See Fig.E2) Store the Adjusted value by pressing the "5"...

  • Page 22: Waveform Table & Voltage Chart

    4. ABBREVIATIONS 5. INPUT/OUTPUT CHART 5.1. INPUT/OUTPUT CHART FOR IC6001 Fig. MP1 Fig. MP2 Fig. MP3 Fig. MP4 5.2. TRUTH TABLE (EG/EGM/EGN/EGY MODEL) 5.3. TRUTH TABLE (B MODEL) 6. WAVEFORM TABLE & VOLTAGE CHART 6.1. WAVEFORM TABLE 6.2. VOLTAGE CHART 7.

  • Page 23: Circuit Board Assemblies

    DIAGRAM 8.5. LUMINANCE & CHROMINANCE/ AUDIO SECTION IN MAIN SCHEMATIC DIAGRAM 8.6. INPUT/ OUTPUT SECTION IN MAIN SCHEMATIC DIAGRAM 8.7. TV DEMODULATOR PACK SCHEMATIC DIAGRAM 8.8. CYLINDER STATOR UNIT SCHEMATIC DIAGRAM 8.9. CAPSTAN UNIT SCHEMATIC DIAGRAM 9. CIRCUIT BOARD ASSEMBLIES 9.1.

  • Page 24: Casing Parts Section

    10.2. CASING PARTS SECTION...

  • Page 25: Packing Parts Section

    10.3. PACKING PARTS SECTION...

  • Page 26: Replacement Parts List

    11. REPLACEMENT PARTS LIST...

  • Page 27: Chassis Parts Section Parts List

    11.1. CHASSIS PARTS SECTION PARTS LIST Ref. No. Part No. Part Name & Description Remarks VEG1523 CYLINDER UNIT [SUPPLIED FROM MBV] VXP2002 UPPER CYLINDER UNIT VDB1256 CYLINDER RETAINER VEM0715 CYLINDER MOTOR UNIT VXS0135 EARTH BRUSH VMD3795 FLAT CABLE HOLDER VEK9069 CAPSTAN UNIT L1AZ00000004 FE HEAD...

  • Page 28: Casing Parts Section Parts List

    Ref. No. Part No. Part Name & Description Remarks VXA6540 SIDE PLATE (R) UNIT VXA5746 CASSETTE HOLDER UNIT VXP1730 MAIN SHAFT UNIT VHD1117 SCREW VHD1117 SCREW VHD0842 SCREW VHD0843 SCREW VHD0843 SCREW VHD0844 SCREW VHD0844 SCREW VHD1066 SCREW VHD1066 SCREW VHD1044 SCREW VHD1060...

  • Page 29: Packing Parts Section Parts List

    Ref. No. Part No. Part Name & Description Remarks VGM1733 TOP PANEL VYP8020 FRONT PANEL UNIT [SUPPLIED FROM MBV]NV-SJ420EG-S/ EGMS/EGNS/EGYS VYP8021 FRONT PANEL UNIT [SUPPLIED FROM MBV]NV-SJ420B RKA0072-K FOOT RKA0072-K FOOT VKA0191 VKA0191 VGB0554 SUPER DRIVE BADGE [SUPPLIED FROM MBV]...

  • Page 30: Electrical Parts List

    Ref. No. Part No. Part Name & Description Remarks VQT9037 OPERATING INSTRUCTIONS(GERMAN) [SUPPLIED FROM MBV]NV- SJ420EG-S/EGMS/EGYS VQT9038 OPERATING INSTRUCTIONS(FRENCH) [SUPPLIED FROM MBV]NV- SJ420EG-S/EGMS/EGYS VQT9040 OPERATING INSTRUCTIONS(ITALIAN) [SUPPLIED FROM MBV]NV- SJ420EG-S/EGYS VQT9039 OPERATING INSTRUCTIONS(SPANISH) [SUPPLIED FROM MBV]NV- SJ420EG-S VQT9041 OPERATING INSTRUCTIONS(DUTCH) [SUPPLIED FROM MBV]NV- SJ420EG-S/EGMS VQT9042...
  • Page 31 [SUPPLIED FROM MBV](RTL) NV-SJ420B-S THE FOLLOWING C.B.A. IS INCLUDED IN MAIN C.B.A. VEP07A23P VEP06D85N MAIN C.B.A. [SUPPLIED FROM MBV](RTL) NV-SJ420EG-S/EGNS/EGMS THE FOLLOWING C.B.A. IS INCLUDED IN MAIN C.B.A. VEP07A23N VEP06E00J MAIN C.B.A. [SUPPLIED FROM MBV](RTL) NV-SJ420EGYS THE FOLLOWING C.B.A. IS INCLUDED IN MAIN C.B.A.
  • Page 32 C0715 ECUX1H030CCV C.CAPACITOR CH 50V 3P NV-SJ420EG-S/EGNS/EGMS/EGYS Ref. No. Part No. Part Name & Description Remarks C0716 ECUX1E223KBV C.CAPACITOR CH 25V 0.022U C0717 ECUM1H330GUV C.CAPACITOR CH 50V 33P C0718 ECEA1CKN100 E.CAPACITOR 16V 10U C0719 ECUX1E104ZFV C.CAPACITOR CH 25V 0.1U C0721 ECUX1H820JCV C.CAPACITOR CH 50V 82P...
  • Page 33 Ref. No. Part No. Part Name & Description Remarks C2506 ECUM1C563KBV C.CAPACITOR CH 16V 0.056U C2507 ECUM1C563KBV C.CAPACITOR CH 16V 0.056U C2508 ECUX1C104ZFV C.CAPACITOR CH 16V 0.1U C2509 ECUM1C474ZFV C.CAPACITOR CH 16V 0.47U [SUPPLIED FROM MBV] C2510 ECUX1H330JCV C.CAPACITOR CH 50V 33P C2511 ECEA0JKN220 E.CAPACITOR 6.3V 22U...
  • Page 34 Ref. No. Part No. Part Name & Description Remarks C3048 ECUX1H221JCV C.CAPACITOR CH 50V 220P C3050 VCEA1ACB220 E.CAPACITOR 10V 22U C3051 ECUX1H681JCV C.CAPACITOR CH 50V 680P C3052 ECUX1H820JCV C.CAPACITOR CH 50V 82P C3053 ECUX1H680JCV C.CAPACITOR CH 50V 68P C3054 ECUX1H680JCV C.CAPACITOR CH 50V 68P C3501 VCEA0JCC470...
  • Page 35 Ref. No. Part No. Part Name & Description Remarks C4913 ECUX1H181JCV C.CAPACITOR CH 50V 180P C4914 ECUX1H102KBV C.CAPACITOR CH 50V 1000P C4916 ECUX1C104KBV C.CAPACITOR CH 16V 0.1U C4917 ECUX1C104KBV C.CAPACITOR CH 16V 0.1U C4918 VCEA1HCB010 E.CAPACITOR 50V 1U C4919 ECUX1C104KBV C.CAPACITOR CH 16V 0.1U C4920 ECUX1C104ZFV...
  • Page 36 Ref. No. Part No. Part Name & Description Remarks C7607 ECUX1H221JCV C.CAPACITOR CH 50V 220P C7608 ECUX1H221JCV C.CAPACITOR CH 50V 220P C7609 ECUX1H221JCV C.CAPACITOR CH 50V 220P C7610 VCEA1HCB100 E.CAPACITOR 50V 10U C7611 ECUM1H221JCN C.CAPACITOR CH 50V 220P C7612 ECUX1C104ZFV C.CAPACITOR CH 16V 0.1U C7614 ECUX1H330JCV...
  • Page 37 [SUPPLIED FROM MBV] K0703 ERJ3GEY0R00 M.RESISTOR CH 1/16W 0 K0707 ERJ3GEY0R00 M.RESISTOR CH 1/16W 0 K0708 ERJ3GEY0R00 M.RESISTOR CH 1/16W 0 NV-SJ420EG-S/EGNS/EGMS/EGYS K0709 ERJ3GEY0R00 M.RESISTOR CH 1/16W 0 K3003 ERJ6GMZ0R00 M.RESISTOR CH 1/10W 0 K3503 ERJ6GMZ0R00 M.RESISTOR CH 1/10W 0...
  • Page 38 Ref. No. Part No. Part Name & Description Remarks L0703 ELJNA1R8JF CHIP INDUCTOR NV-SJ420B-S L0703 ELJNA2R2JF INDUCTOR 2.2UH NV-SJ420EG-S/EGNS/EGMS/EGYS L0705 ELESE330KA INDUCTOR 33UH NV-SJ420EG-S/EGNS/EGMS/EGYS L1107 ELF15N005A LINE FILTER L1108 ELF15N003A LINE FILTER L1121 VLQ0655K220 COIL 22UH L1122 G0A220G00018 COIL [SUPPLIED FROM MBV]G0A220G00019...
  • Page 39 TRANSISTOR Q1003 2SD1996-S TRANSISTOR Q1004 2SD1996-S TRANSISTOR Q1005 2SD602A-R TRANSISTOR Q1006 2SD601A TRANSISTOR Q1007 2SD1996-S TRANSISTOR Q1008 2SB710A TRANSISTOR NV-SJ420EG-S/EGNS/EGMS/EGYS Q1101 2SD1996-S TRANSISTOR Q1102 2SB1030A TRANSISTOR Q1111 PC123ZY2 PHOTO COUPLER B3PBA0000078 Q1201 2SD1996-S TRANSISTOR Q1202 2SD1996-S TRANSISTOR Q1501 PNB2301MBV TRANSISTOR...
  • Page 40 M.RESISTOR CH 1/16W 0 R0728 ERJ3GEY0R00 M.RESISTOR CH 1/16W 0 NV-SJ420B-S R0729 ERJ3GEYJ103 M.RESISTOR CH 1/16W 10K R0730 ERJ6GEYJ103 M.RESISTOR CH 1/10W 10K NV-SJ420EG-S/EGNS/EGMS/EGYS R0733 ERJ3GEYJ221 M.RESISTOR CH 1/16W 220 R0734 ERJ3GEYJ392 M.RESISTOR CH 1/16W 3.9K R0737 ERJ3GEYJ102 M.RESISTOR CH 1/16W 1K NV-SJ420B-S...
  • Page 41 Ref. No. Part No. Part Name & Description Remarks R1119 ERJ6GMYJ273 M.RESISTOR CH 1/10W 27K R1120 ERJ6RBD222 M.RESISTOR CH 1/10W 2.2K R1121 ERJ6RBD272 M.RESISTOR CH 1/10W 2.7K R1123 ERDS2FJ222 C.RESISTOR 1/4W 2.2K R1124 ERDS2FJ223 C.RESISTOR 1/4W 22K R1125 ERJ6GMYJ101 M.RESISTOR CH 1/10W 100 R1126 ERDS2FJ123 C.RESISTOR 1/4W 12K...
  • Page 42 Ref. No. Part No. Part Name & Description Remarks R4002 ERJ6GMYJ334 M.RESISTOR CH 1/10W 330K R4003 ERJ6GMYJ103 M.RESISTOR CH 1/10W 10K R4004 ERJ6GMYG241 M.RESISTOR CH 1/10W 240 R4005 ERJ6GMYJ223 M.RESISTOR CH 1/10W 22K R4006 ERJ6GMYJ753 M.RESISTOR CH 1/10W 75K R4007 ERJ6GMYJ153 M.RESISTOR CH 1/10W 15K R4008...
  • Page 43 M.RESISTOR CH 1/10W 220 R6014 ERJ6GMYJ471 M.RESISTOR CH 1/10W 470 R6015 ERJ6GMYJ471 M.RESISTOR CH 1/10W 470 R6016 ERJ6GMYJ102 M.RESISTOR CH 1/10W 1K NV-SJ420EG-S/EGNS/EGMS/EGYS R6017 ERJ6GMYJ102 M.RESISTOR CH 1/10W 1K R6018 ERJ6GMYJ102 M.RESISTOR CH 1/10W 1K R6019 ERJ6GMYJ103 M.RESISTOR CH 1/10W 10K...
  • Page 44 M.RESISTOR CH 1/10W 220 R7725 ERJ6GMYJ221 M.RESISTOR CH 1/10W 220 R7726 ERJ6GMYJ152 M.RESISTOR CH 1/10W 1.5K R7728 ERJ6GMYJ473 M.RESISTOR CH 1/10W 47K NV-SJ420EG-S/EGNS/EGMS/EGYS R7729 ERJ6GMYJ102 M.RESISTOR CH 1/10W 1K R7730 ERJ6GMYJ102 M.RESISTOR CH 1/10W 1K R7731 ERJ6GMYJ102 M.RESISTOR CH 1/10W 1K...
  • Page 45 SWITCH S7513 EVQ11L07B SWITCH S7514 EVQ11G07K SWITCH S7515 EVQ11L07B SWITCH T0701 EQV5EC083P TRANSFORMER NV-SJ420B-S T0701 EQV5EC082P TRANSFORMER NV-SJ420EG-S/EGNS/EGMS/EGYS T1101 ETE28K131AZ SWITCHING TRANSFORMER T4001 EQQ7QF025P TRANSFORMER T4002 EQQ7QF026P TRANSFORMER TU7601 ENG47317G1 TUNER [SUPPLIED FROM MBV]NV-SJ420B- TU7601 ENG47316G1 TUNER [SUPPLIED FROM MBV]NV-...
  • Page 46 CYLINDER SERVO SPEED LOOP P2901 MAIN COIL 2 MAIN COIL 3 HALL IC GND (CYL) MAIN COIL 1 NOTE:DO NOT USE ANY PART NUMBER SHOWN ON THIS SCHEMATIC DIAGRAM FOR ORDERING.WHEN YOU ORDER A PART,PLEASE REFER TO PARTS LIST.
  • Page 47 VIDEO MAIN SIGNAL PATH IN REC MODE VIDEO MAIN SIGNAL PATH IN PLAYBACK MODE AUDIO MAIN SIGNAL PATH IN REC MODE AUDIO MAIN SIGNAL PATH IN PLAYBACK MODE :TO POWER SUPPLY/RF SECTION :TO SYSTEM CONTROL & SERVO SECTION :TO LUMINANCE & CHROMINANCE/AUDIO SECTION L4903 R4945 C4925...
  • Page 48 :TO POWER SUPPLY/RF SECTION THE STRIPED FRAME INDICATES THE PRIMARY CIRCUIT TO DISTINGUISH THE PRIMARY CAUTION :TO TIMER SECTION FROM THE SECONDARY CIRCUIT. PAY ATTENTION NOT TO RECEIVE AN ELECTRIC SHOCK DURING REPAIR AND SERVICE OF THE PRODUCTS. T1101 ETE28K131AZ LB1102 C1101 D1125...
  • Page 49 VIDEO MAIN SIGNAL PATH IN REC MODE AUDIO MAIN SIGNAL PATH IN REC MODE VIDEO MAIN SIGNAL PATH IN PLAYBACK MODE AUDIO MAIN SIGNAL PATH IN PLAYBACK MODE :TO POWER TRANSFORMER SECTION :TO SYSTEM CONTROL & SERVO SECTION TU7601 Q1002 Q1006 TUNER UNIT :TO LUMINANCE &...
  • Page 50 CAPSTAN SERVO SPEED LOOP CAPSTAN SERVO PHASE LOOP CYLINDER SERVO SPEED LOOP CYLINDER SERVO PHASE LOOP :TO POWER SUPPLY/RF SECTION V :TO LUMINANCE & CHROMINANCE/AUDIO SECTION :TO INPUT/OUTPUT SECTION T :TO TIMER SECTION IC1502 R2507 R2508 C2509 R6030 270K 0.47 RPI354N TW2015 4700...
  • Page 51 R7714 R7713 R7712 4700 4700 4700 OSD IIC DATA OSD IIC CLOCK C7707 R7715 L7701 R7711 IC7702 M24C16-WBN6 IC7701 SDA5650X P2501 CURR LIMIT CAP ET CAP ED/S CAP FG1 L6001 100u GND (FG) REG 5V GND (MOTOR) C6001 LOAD MOTOR (-) 6V47 LOAD MOTOR (+) PS 14V...
  • Page 52 DP7501 25U39169TANF :TO POWER TRANSFORMER SECTION :TO POWER SUPPLY/RF SECTION S-VHS CVC VP EP :TO SYSTEM CONTROL & SERVO SECTION REMAIN Link R7508 PS HEATER (+) C7501 0.01 HEATER (-) D7501 C7502 R7511 R7510 MN4220NM 50V10 R7509 FIP -29V IC7501 M35502AFP C7503 S.DATA...
  • Page 53 VIDEO SIGNAL PATH AUDIO SIGNAL PATH R0746 T0701 R0729 R0730 R0701 560K C0719 100K EQV5EC082P:A/B EVQ5EC083P:C R0740 R0717 (A/B) C0724 C0709 R0745 R0711 220P:A/B 3.3M 330P:C R0728 C0707 R0737 R0726 50V2.2 330:A/B 1K:C C0717 C0708 L0705 C0706 R0727 50V1 0.47 C0705 R0742 Q0702...
  • Page 54 VIDEO MAIN SIGNAL PATH IN REC MODE VIDEO MAIN SIGNAL PATH IN PLAYBACK MODE AUDIO MAIN SIGNAL PATH IN REC MODE AUDIO MAIN SIGNAL PATH IN PLAYBACK MODE :TO POWER SUPPLY/RF SECTION S :TO SYSTEM CONTROL & SERVO SECTION I :TO INPUT/OUTPUT SECTION IC3501 :TO TIMER SECTION AN3368SB...
  • Page 55 L3010 R3026 C3046 R3022 D3001 R3025 3900 680K C3040 MA165 6V100 L3009 C3036 C3037 C3047 C3048 R3027 C3045 L3011 C3041 6V220 820P 220P C3043 R3023 C3042 10V22 C3039 C3031 16V10 220K 0.022 R3034 C3038 C3035 0.01 L3008 2.2M 25V4.7 25V4.7 100u C SYNC ART V/H/N...
  • Page 56 CYLINDER STATOR UNIT Integrated Circuit HALL IC Connector M1 VM P2901 ADDRESS INFORMATION HALL IC VM M2 P2901 (VEM0715)
  • Page 57 (VEP06D85N:NV-SJ420EG/EGM/EGN)(VEP06E00J:NV-FJ420EGY)(VEP06D85P:NV-SJ420B) (A/B) (A/B)
  • Page 58 IMPORTANT SAFETY NOTICE: COMPONENTS IDENTIFIED WITH THE MARK HAVE THE SPECIAL CHARACTERISTICS FOR SAFETY. WHEN REPLACING ANY OF THESE COMPONENTS, USE ONLY THE SAME TYPE. THE STRIPED FRAME INDICATES THE PRIMARY CIRCUIT TO DISTINGUISH THE PRIMARY CAUTION FROM THE SECONDARY CIRCUIT. PAY ATTENTION NOT TO RECEIVE AN ELECTRIC SHOCK DURING REPAIR AND SERVICE OF THE PRODUCTS.
  • Page 59 (VEP07A23N:NV-SJ420EG/EGM/EGN/EGY) TV DEMODULATOR PACK C.B.A. (VEP07A23P:NV-SJ420B) Transistor Q0701 Q0702 Integrated Circuit (A/B) IC0701 Adjustment T0701 VR0701 Connector PK0701 PP0701 ADDRESS INFORMATION...
  • Page 60 T1101-3 STOP T1101-7 STOP IC1101-1 STOP IC1101-2 STOP IC1101-4 STOP 9.0Vp-p (2msec. div.) 100Vp-p (5µsec. div.) 470Vp-p (5µsec. div.) 8.0Vp-p (10µsec. div.) 0.5Vp-p (10µsec.div.) IC1101-5 STOP IC6001-20 PAUSE IC6001-21 REC IC6001-24 REC IC6001-61 REC 0.6Vp-p (10µsec.div.) 5.0Vp-p (10msec.div.) 5.0Vp-p (10msec.div.) 5.0Vp-p (10msec.div.) 2.4Vp-p (20µsec.div.) IC6001-68 REC...
  • Page 61 SYSTEM CONTROL & SERVO ICs DC VOLTAGE CHART (SP MODE) IC1501 IC1502 Ref. No. MODE STOP PLAY Ref. No. IC2501 MODE STOP 16.8 16.8 16.8 16.8 PLAY 14.9 14.9 15.2 14.9 15.1 15.1 15.4 15.1 14.4 14.4 14.6 14.7 14.3 14.3 14.6 14.9...
  • Page 62 No. Port Name Description P-OFF P-Save P-FAIL Reset CURRENT_LIMIT O Capstan motor current limit terminal. F ADJUST O Analogue voltage output for HEAD frequency response adjustment N.C. -- Low fix (No Connection.) Terminal of the Current emphasis video/FM audio recording current. [HIFI/2HEAD ]:Fix to Low (Normal mode) C EMPHA(H) [4HEAD]...
  • Page 63 No. Port Name Description P-OFF P-Save P-FAIL Reset ROTARY.SW O Output terminal for rotary switch. H.A.SW O Output terminal for HEAD AMP switch. ENVE.SELECT I Input terminal for enverope selection. VIDEO.H.SW O Output terminal for video HEAD switch. A.H.SW O Output terminal for FM audio HEAD switch. Audio Mute output terminal for tuner and decoder.
  • Page 64 No. Port Name Description P-OFF P-Save P-FAIL Reset LC.OSC OUT O The oscillation output terminal for OSD dot clock. RESET(L) I Input terminal for microprocessor reset. 4FC.LPF I 4fc clock input terminal OSD.FSC IN I OSD clock input terminal 5V(OSD) I 5V input terminal CVIN I Input terminal for Composite video signal.
  • Page 65 No. Port Name Description P-OFF P-Save P-FAIL Reset FLD/T2 DATA OUT O Serial data output terminal for FIP driver and TEST_2(Factory use). Not fix Low FLD_CS O Chip select terminal for FIP driver. Not fix Low T.REEL.PULSE I Input terminal for Take-up Reel sensor pulse. S.REEL.PULSE I Input terminal for Supply Reel sensor pulse.
  • Page 66 INPUT CONDITION VIDEO OUTPUT RESULT AUDIO OUTPUT RESULT POWER INPUT RF (C) AV1 Out AV2 Out SELECT ON(H) PB(H) PB(H) PB(H) Selector Selector AV2 In AV1 In AV2 In AV1 In Mute AV2 In AV1 In AV2 In AV1 In AV2 In AV1 In Mute...
  • Page 67 INPUT CONDITION VIDEO OUTPUT RESULT AUDIO OUTPUT RESULT POWER INPUT RF (C) AV1 Out AV2 Out SELECT ON(H) PB(H) PB(H) PB(H) Selector Selector P.ON NO.TU VCR out VCR out INSEL C+.TU VCR out VCR out INSEL VCR out VCR out AV1 In AV1 In AV1 In...
  • Page 68 INPUT CONDITION VIDEO OUTPUT RESULT AUDIO OUTPUT RESULT POWER INPUT RF (C) AV1 Out AV2 Out SELECT ON(H) PB(H) PB(H) PB(H) Selector Selector P.ON DECODER VTR NO.TU VCR out AV1 In AV1 In AV1 In VCR out AV1 In AV1 In AV1 In C+.TU VCR out TUN IN...
  • Page 69 INPUT CONDITION VIDEO OUTPUT RESULT AUDIO OUTPUT RESULT POWER INPUT RF (C) AV1 Out AV2 Out SELECT ON(H) PB(H) PB(H) PB(H) Selector Selector AV2 In AV1 In AV2 In AV1 In Mute AV2 In AV1 In AV2 In AV1 In AV2 In AV1 In Mute...
  • Page 70 INPUT CONDITION VIDEO OUTPUT RESULT AUDIO OUTPUT RESULT POWER INPUT RF (C) AV1 Out AV2 Out SELECT ON(H) PB(H) PB(H) PB(H) Selector Selector P.ON VCR out VCR out INSEL VCR out VCR out AV1 In AV1 In AV1 In AV1 In INSEL VCR out VCR out AV2 In...
  • Page 71 4.43 NTSC L BILINGUAL 443NT [L] BILINGUAL L A. COMP BIL [L] AUDIO COMPONENT SIGNAL BILINGUAL H BIL. [H] A. COMPO AUDIO COMPONENT SIGNAL BILINGUAL L AUDIO DUBBING PAUSE L BIL/M1 [L] A. D.P [L] AUDIO DUBBING PAUSE L BS CLOCK A.
  • Page 72 CYL GND CYLINDER GND FULL. E. 12V FULL ERASE 12V DELAIED FM RECORDING H D.F.M. REC [H] GND (ANALOG) GND [A] DELAIED FM RECORDING L D. FM REC [L] GND (TUNER) GND [TU] D. GND GND/NON SW 12V DIGITAL GND GND/N.
  • Page 73 POWER OFF H LINE IN [R] LINE INPUT (R) P-OFF [H] POWER OFF L LINE OUT [L] LINE OUTPUT (L) P-OFF [L] LINE OUT [R] LINE OUTPUT (R) P. FAIL POWER FAILURE DETECT LP H POWER OFF H LP [H] P.
  • Page 74 SYSTEM CONTROL 5V RF OUT RF OUTPUT SYSCON 5V SYSTEM SW RF Y RF LUMINANCE SIGNAL SYSTEM TAKE-UP PHOTO TRANSISTOR RF. Y. IN RF LUMINANCE SIGNAL INPUT T-PHOTO TAKE-UP REEL PULSE RF. Y. OUT RF LUMINANCE SIGNAL OUTPUT T-RL. PLS TIMER BUS CLOCK ROTAR.
  • Page 75 If you lose the fuse cover the plug must not be used until a replacement cover is obtained. A replacement fuse cover can be purchased from your local Panasonic Dealer. IF THE FITTED MOULDED PLUG IS UNSUITABLE TYPE B FOR THE SOCKET OUTLET IN YOUR HOME THEN THE FUSE SHOULD BE REMOVED AND THE PLUG CUT OFF AND DISPOSED OF SAFELY.
  • Page 76 IC6001 CAPSTAN IC7501 IC0201 (CAPSTAN MOTOR DRIVE) (SYSTEM CONTROL/SERVO IC) DP7501 MOTOR TL2503 L0201 TL0201 P0201 P2501 MOTOR DIFFERENTIAL TORQUE CURRENT DRIVE AMPRIFIER CONTROL LIMIT TIMER DISPLAY 20MHz IN 31 CAPSTAN P0201 P2501 ERROR TORQUE X6002 20MHz OUT 32 POSITION CAPSTAN P0201 P2501...
  • Page 77 MAIN SIGNAL PATH IN REC MODE MAIN SIGNAL PATH IN PLAYBACK MODE Y/C VIDEO OUT TO/FROM SYSTEM CONTROL VIDEO OUT IC4901 Q4904 SYSTEM C SYNC CONTROL TO TUNER RFC VIDEO OUT CLAMP FROM TV TUNER VIDEO CLAMP DEMODULATOR JK4903 (AV1) PB +12V BLUE GREEN...
  • Page 78 IC3001 PEAKING H-TRAP NLDE DOUB IC3501 PICT TW3030 DELAY AMP & H.AMP FAMI CLP1 P3502 LP L REC-Y FAMI TO/FROM P3502 CYLINDER LP COM VIDEO HEAD MAIN PREAMP P3502 LP R & H.SW FAMI TW3001 H.AMP CLIP L-TRAP &HPF MAIN SYNC CLAMP EMPH...
  • Page 79 R0206 (FG HEAD) R0212 R0213 Q0203 P0201 Q0202 IC0201 R0207 CURR LIMIT (CAPSTAN MOTOR DRIVE) HOLE HOLE CAP ET SENSOR SENSOR CAP ED/S RCC SET CAP FG1 Q0201 GND (FG) R0210 C0201 REG 5V GND (MOTOR) D0203 TL0204 TL0202 TL0203 LOAD MOTOR (-) LOAD MOTOR (+) TL0201...

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