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Panasonic NV-MV20GC Service Manual
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Panasonic NV-MV20GC Service Manual

Panasonic NV-MV20GC Service Manual

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ORDER NO. MAVR0304004C8
Video Cassette Recorder
NV-MV20GC / NV-MV20GCS / NV-MV20GM / NV-MV20GL / NV
-MV20EE / NV-MV20GCU / NV-MV20GCF / NV-MV20GH
R4-MECHANISM
SPECIFICATIONS
2003 Matsushita Electric Industrial Co., Ltd. All rights reserved.

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Summary of Contents for Panasonic NV-MV20GC

  • Page 1 ORDER NO. MAVR0304004C8 Video Cassette Recorder NV-MV20GC / NV-MV20GCS / NV-MV20GM / NV-MV20GL / NV -MV20EE / NV-MV20GCU / NV-MV20GCF / NV-MV20GH R4-MECHANISM SPECIFICATIONS 2003 Matsushita Electric Industrial Co., Ltd. All rights reserved.
  • Page 2 Please refer to the service manual for R4-Mechanism Chassis. (Order No. VRD0202010C8) 2. The Model No. is indicated on the Schematic Diagram and Circuit Board Diagrams as follows. Model No. Indication Mark NV-MV20GC/GCS/GM NV-MV20GL NV-MV20EE NV-MV20GCU/GCF NV-MV20GH 1.2. ABOUT LEAD FREE SOLDER (PbF) Distinction of PbF PCB: PCBs (manufactured) using lead free solder will have a PbF stamp on the PCB.
  • Page 3 a high temperature soldering iron. In case of soldering iron with temperature control,please set it to 700±20°F (370±10°C) - Pb free solder will tend to splash when heated too high (about 1100°F/600°C). When soldering or unsoldering, please completely remove all of the solder on the pins or solder area, and be sure to heat the soldering points with the Pb free solder until it melts enough.
  • Page 4 [1.PREPARATION] Before replacing IC6001: 1. Take note that stored TV broadcast channels. (Because, its user may store TV broadcasts by manually other than "Auto Tuning" operation and it is also erased.) NOTE: During servicing, do not make a short circuit between IC6001-pin 37 (5V) with other line/ Components otherwise IC6001 may be broken.
  • Page 5 Note: Since the resistance at pin 2 as well as pin 3 of IC6001 decides the model distinction data, there is no need to set up the Model code, which is necessary in the previous models. STEP4.LINE-IN SETTING & ACTIVATE PLUG-IN A.T.P. (FOR OTHER THAN NV-MV20GL) 1.
  • Page 6 STEP5.COMPATIBILITY ADJUSTMENT Refer to the Electrical Adjustment Procedures. 2.2. CAUTION FOR AC MAINS LEAD (NV-MV20GH) 2.3. HOW TO REPLACE THE LITHIUM BATTERY 2.3.1. GENERAL DESCRIPTION There is a RAM in the IC6001, which is backing up the following data by using the power source of B7751 (Back-up Battery) and C7752 (Back-up Capacitor: Back-up time is approximately 30 minutes).
  • Page 7 NOTE: The lithium battery is a critical component (Manufactured by Panasonic.) It must never be subjected to excessive heat or discharge. It must therefore only be fitted in equipment designed specifically for its use. Replacement batteries must be of the same type and manufacture.
  • Page 8 PROCEDURE Auto Tuning will start by the following procedure. 1. Connect the DIN-RF Cable. 2. Connect the AC Mains Lead. 3. Turn on the VCR. Auto Tuning will start. Auto Tuning search for TV stations from VHS minimum to UHF maximum and memorizes every tuned program position.
  • Page 9 4. If the VCR starts playback during Auto Tuning, Auto Tuning will stop halfway. The VCR should be reset and restarted by the item 2 in order to execute Auto Tuning. 5. To cancel Auto Tuning Mid-operation, press POWER During Auto Tuning (The VCR is turned off).
  • Page 10 Front Panel by referring to the Disassembly Procedures. B. Connect three batteries (1.5V spec.) to the Loading Motor in series for supplying 4.5V to rotate the Loading Motor as shown Fig. S2 Fig. S2 C. Stop unloading just before unloading would be completed as shown in Fig.
  • Page 11 E. Rotate the S-Reel by a small minus screwdriver (Fig. S5 ) to remove the slack tape as shown in Fig. S6 Fig. S5 Fig. S6 F. Then unload again to remove the cassette tape as shown in Fig. S7 Fig.
  • Page 12 3. Removal by manual operations after uninstalling the mechanism, refer to the DISASSEMBLY METHOD of item 3.1.. A. Disconnect the AC plug, and remove the Top Panel, Front Panel and the Mechanism by referring to the Disassembly Procedures. B. Remove the Screw (S1) and remove the Loading Motor both as shown in Fig.
  • Page 13 E. Rotate the Main Cam Gear counter-clockwise again (Fig. S9 ) to remove the cassette-tape as shown in Fig. S7 F. Set the Position Switch to EJECT POSITION certainly as shown Fig. S10 Fig. S10 G. Install the Loading Motor and tighten screw (S1) as shown in Fig.
  • Page 14 2. Unlock 2 locking tabs on a side to release the Cylinder Flexible Card as shown in Fig. S11 CAUTION: Handle the Cylinder Flexible Card with care. When it damaged, you should replace it with a new Cylinder Unit. 3. Remove a red Screw (S2) and 2 gold Screws (S3) to remove the Cylinder Unit shown in Fig.
  • Page 15 2. Turn the DD Cylinder Unit over. Fig. S12 3. Insert the Flexible card into the FPC HOLDER. Fig. S13 4. Hook the Flexible card to the FPC HOLDER. Fig. S14 5. Insert the FPC HOLDER to the DD Cylinder Unit. Fig.
  • Page 16 Refer to the Service Manual for R4 Mechanism Chassis. (Order No.: VRD0202010C8). 2.6. 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 [...
  • Page 17 for end users] for all VHS/S-VHS VCP and VCR. 2. These cleaning cassettes are exclusive removing the hard and sticky clogging on video heads. 3. These improve the efficiency of video head cleaning service and shortening cleaning time for end users. VFK0923FT (For Service usage) Type of Cassette...
  • Page 18 VFK0823FSE (For end users) Note: The tape material itself is the same in both types. 3. ADJUSTMENT PROCEDURES 3.1. DISASSEMBLY METHOD 3.1.1. DISASSEMBLY FLOW CHART This flow chart indicates disassembly steps of the cabinet parts and the circuit boards in order to find the necessary items for servicing.
  • Page 19 3.1.2. DETAIL OF DISASSEMBLY METHOD 1. REMOVAL OF THE TOP PANEL Remove 2 Screws (A) Remove 2 Screws (B) Fig.D2...
  • Page 20 2. REMOVAL OF THE BACK PANEL Remove 2 Screws (C) Remove Screw (D) Fig. D3 3. REMOVAL OF THE FRONT PANEL UNIT Unlock 7 Tabs (E)
  • Page 21 Fig. D4 4. REMOVAL OF THE MECHANISM UNIT Remove Screw (F) Remove 3 Screws (G) Remove Screw (H) Disconnect Cylinder Connector Disconnect A/C Head Connector Disconnect P1531 Fig. D5 5. REMOVAL OF THE MAIN C.B.A.
  • Page 22 Remove 4 Screws (I) Fig. D6 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. D7 Fig. D7 6. SERVICING POSITION Install the Mechanism Unit on to the MAIN C.B.A.. Then fix a screw (H), and connect two frexible card Connectors (Cylinder connector, AC Head connector) and P1531 as shown in Fig.
  • Page 23 3.2. MECHANICAL ADJUSTMENT PROCEDURES Refer to the Service Manual for R4-Mechanism Chassis. (Order No. VRD0202010C8) 3.3. ELECTRICAL ADJUSTMENT PROCEDURES This section provides complete adjustment procedures required for electric circuits of VCR. 3.3.1. TEST EQUIPMENT To perform electrical adjustments following equipment is required. 1.
  • Page 24 PROCEDURE F.I.P. DISPLAY 1. Turn on the Service Mode 1.Press the FF key and the EJECT key simultaneously for more than 3 seconds. 2. Activate the Service Mode 2 While keep pressing FF key, press the EJECT key in twice. 3.
  • Page 25 NG1 in the PG Shifter Automatic Adjustment (The cylinder rotation is unstable during the automatic adjustment.) NG2 in the PG Shifter Automatic Adjustment (The vertical sync signal is lacked while over 5 seconds on the alignment tape.) NG3 in the PG Shifter Automatic Adjustment (The installing position of Heads to the cylinder is our of specification.
  • Page 26 7.1. SYSTEM CONTROL & SERVO BLOCK DIAGRAM 7.2. LUMINANCE & CHROMINANCE BLOCK DIAGRAM 8. SCHEMATIC DIAGRAMS 8.1. POWER TRANSFORMER SECTION IN MAIN SCHEMATIC DIAGRAM 8.2. POWER SUPPLY/ RF SECTION IN MAIN SCHEMATIC DIAGRAM 8.3. TIMER SECTION IN MAIN SCHEMATIC DIAGRAM 8.4.
  • Page 27 10.2. CASING PARTS SECTION...
  • Page 28 10.3. PACKING PARTS SECTION...
  • Page 29 11. REPLACEMENT PARTS LIST 11.1. CHASSIS PARTS SECTION PARTS LIST...
  • Page 30 Note: *All parts except parts mentioned [AVC-SPC] in the Remarks column are supplied from MAV. Parts mentioned [AVC-SPC] are supplied from PAVC-CSG (AVC-SPC). Ref. No. Part No. Part Name & Description Remarks VEG1616-DKIT CYLINDER UNIT VEM0750 CAPSTAN UNIT L1AZ00000004 FE HEAD VDG1510 INTERMEDIATE GEAR VDG1511...
  • Page 31 Ref. No. Part No. Part Name & Description Remarks VXA7110 CASSETTE HOLDER UNIT VXL3160 MAIN SHAFT UNIT VHD1044 SCREW XSN3+35 SCREW XTN26+7J SCREW XTN26+7J SCREW XTN26+7J SCREW XTV26+5F SCREW XTV26+5F SCREW XTV26+8FR SCREW XTV26+8FR SCREW VHD1066 SCREW VHD1066 SCREW VHD1185 SCREW VHD1095 SCREW...
  • Page 32 Part No. Part Name & Description Remarks VGM1991 TOP PANEL VMP7569 CHASSIS FRAME VMP7575 BACK PANEL VYP8719 FRONT PANEL (1) UNIT NV-MV20GC/GCS/GM/EE/GCU/GCF/GH VYP8718 FRONT PANEL (1) UNIT NV-MV20GL VKF3716 BLINDER PANEL VMB2521 BLINDER SPRING VGB0554 SUPER DRIVE BADGE VMX3115 MECHANISM SPACER (F)
  • Page 33 Ref. No. Part No. Part Name & Description Remarks VQT0B41 OPERATING INSTRUCTIONS NV-MV20GC/GCS (ENGLISH/ARABIC) VQT0C27 OPERATING INSTRUCTIONS NV-MV20GM (ENGLISH) VQT0B34 OPERATING INSTRUCTIONS NV-MV20GL (ENGLISH) VQT0B37 OPERATING INSTRUCTIONS NV-MV20EE/GCU (ENGLISH/RUSSIAN) VQT0B36 OPERATING INSTRUCTIONS NV-MV20GCF (ENGLISH) VQT0B39 OPERATING INSTRUCTIONS NV-MV20GH (ENGLISH/CANTONESE) N2QAHB000032...
  • Page 34 Parts mentioned [AVC-SPC] are supplied from PAVC-CSG (AVC-SPC). Note2: “*1”, “*2”, “*3”, “*4”, “*5” in the Remarks column shows the models as follows. “*1” : NV-MV20EE-S “*2” : NV-MV20GC-S/ GCS-S/ GM-S “*3” : NV-MV20GCF-S/ GCU-S “*4” : NV-MV20GH-S “*5” : NV-MV20GL-S Ref.
  • Page 35 Ref. No. Part No. Part Name & Description Remarks C1123 F1BAF1020020 C.CAPACITOR C1143 ECEC2GG680FZ E.CAPACITOR C1151 ECQB1H473JF3 P.CAPACITOR C1152 ECQB1H103JF3 P.CAPACITOR C1153 ECQB1H104JM3 P.CAPACITOR C1154 ECQB1H223JM3 P.CAPACITOR C1155 F1A3A271A028 C.CAPACITOR C1200 ECQB1H104JM3 P.CAPACITOR C1210 F1B3A332A004 C.CAPACITOR C1230 EEUFG1H560B E.CAPACITOR C1250 F2A1C6810023 E.CAPACITOR C1251...
  • Page 36 Ref. No. Part No. Part Name & Description Remarks C3010 F1J1C105A112 C.CAPACITOR C3011 ECEA0JKA470B E.CAPACITOR C3012 F1H1A224A025 C.CAPACITOR C3013 F1H1C104A065 C.CAPACITOR C3015 F1H1C104A065 C.CAPACITOR C3016 F1H1A105A025 C.CAPACITOR C3017 F1H1C104A065 C.CAPACITOR C3019 F1H1C104A065 C.CAPACITOR C3020 ECEA1EKA3R3B E.CAPACITOR C3021 ECEA1CKA100B E.CAPACITOR C3022 F1H1H103A748 C.CAPACITOR C3025...
  • Page 37 Ref. No. Part No. Part Name & Description Remarks C4066 F1H1H222A219 C.CAPACITOR C4075 ECJ1VC1H471J C.CAPACITOR CHIP C4079 ECJ1VC1H471J C.CAPACITOR CHIP *1,*3 C4081 ECQB1H223JM3 P.CAPACITOR C4082 ECJ1VB1H471K C.CAPACITOR CHIP C4083 ECEA0JKA221B E.CAPACITOR C4084 ECJ2VB1H182K C.CAPACITOR CHIP C4085 F1H1E223A064 C.CAPACITOR C4086 ECEA0JKA470B E.CAPACITOR C4583 F1H1H103A730...
  • Page 38 Ref. No. Part No. Part Name & Description Remarks C7506 ECUV1C104ZFV C.CAPACITOR CHIP C7601 ECEA1HKA010B E.CAPACITOR C7603 F1H1H103A730 C.CAPACITOR C7605 ECEA0JKA470B E.CAPACITOR C7608 F1H1H103A730 C.CAPACITOR C7610 ECJ1VB1H102K C.CAPACITOR CHIP C7616 ECEA0JKA470B E.CAPACITOR C7617 F1H1H103A730 C.CAPACITOR C7618 ECEA0JKA470B E.CAPACITOR C7619 F1H1H103A730 C.CAPACITOR C7621 ECJ1VB1H471K...
  • Page 39 Ref. No. Part No. Part Name & Description Remarks F1101 K5D162BK0005 FUSE IC1200 C0DAEJC00003 IC1511 B3NAA0000049 IC1512 B3NAA0000049 IC2501 C1AB00001767 IC2502 C0DBZJG00005 IC3001 C1AB00001739 IC6001 C2CBHF000251 *1,*3 IC6001 C2CBHF000252 *2,*4 IC6001 C2CBHF000253 IC6201 C0EBH0000172 IC6301 C0DBCHD00002 IC7501 C0HBB0000023 IR7501 PNA4618M09VT IR RECEIVER VEE0X50 EARTH WIRE...
  • Page 40 L7608 G0C270JA0030 INDUCTOR Ref. No. Part No. Part Name & Description Remarks L7610 G0C100JA0030 INDUCTOR L7702 G0C100JA0019 INDUCTOR *1,*2,*3,*4 LB1120 J0JKB0000028 FILTER LB1121 ------------ WIRE CABLE LB1210 ------------ WIRE CABLE LB4073 J0JBC0000041 FILTER *1,*3 LB4073 D0GDR00JA017 M.RESISTOR *2,*4,*5 LB4077 J0JBC0000070 FILTER *1,*3 LB4077...
  • Page 41 Ref. No. Part No. Part Name & Description Remarks QR4061 UNR221100L TRANSISTOR RESISTOR QR4081 UNR211100L TRANSISTOR RESISTOR QR4082 UNR221300L TRANSISTOR RESISTOR QR4504 UNR211500L TRANSISTOR RESISTOR QR4506 UNR221500L TRANSISTOR RESISTOR R1150 ERDS2TJ105T C.RESISTOR R1153 ERG2SJ331E M.RESISTOR R1154 ERDS2TJ105T C.RESISTOR R1155 ERDS2TJ104T C.RESISTOR R1156 ERDS2TJ330T...
  • Page 42 Ref. No. Part No. Part Name & Description Remarks R3005 ERJ3GEYJ472V M.RESISTOR CHIP R3011 ERJ3GEYJ332V M.RESISTOR CHIP R3012 ERJ3GEYJ102V M.RESISTOR CHIP R3013 ERJ3GEYJ273V M.RESISTOR CHIP R3018 ERJ3GEYJ153V M.RESISTOR CHIP R3020 ERJ3GEYJ152V M.RESISTOR CHIP R3021 ERJ3GEYJ471V M.RESISTOR CHIP R3022 ERDS2TJ681T C.RESISTOR R3023 ERJ3GEYJ471V M.RESISTOR CHIP...
  • Page 43 Ref. No. Part No. Part Name & Description Remarks R6009 ERJ3GEYJ103V M.RESISTOR CHIP R6010 ERJ3GEYJ103V M.RESISTOR CHIP R6011 ERJ3GEYG223V M.RESISTOR CHIP R6012 ERJ3GEYJ561V M.RESISTOR CHIP R6013 ERJ3GEYJ105V M.RESISTOR CHIP R6016 ERJ3GEYG103V M.RESISTOR CHIP R6017 ERJ3GEYJ222V M.RESISTOR CHIP R6019 ERJ3GEYJ103V M.RESISTOR CHIP R6020 ERJ3GEYJ103V M.RESISTOR CHIP...
  • Page 44 Ref. No. Part No. Part Name & Description Remarks S1531 K0C111A00006 SWITCH S1532 K0ZZ00000598 SWITCH S7501 EVQ21409K LIGHT TOUCH SWITCH S7502 EVQ21409K LIGHT TOUCH SWITCH S7503 EVQ11L09B LIGHT TOUCH SWITCH S7505 EVQ11L09B LIGHT TOUCH SWITCH S7506 EVQ11L09B LIGHT TOUCH SWITCH S7507 EVQ11L09B LIGHT TOUCH SWITCH...
  • Page 45 Ref. No. Part No. Part Name & Description Remarks W535 ERJ3GEY0R00V M.RESISTOR CHIP W536 ERJ3GEY0R00V M.RESISTOR CHIP W537 ERJ3GEY0R00V M.RESISTOR CHIP W538 ERJ3GEY0R00V M.RESISTOR CHIP W539 ERJ3GEY0R00V M.RESISTOR CHIP W540 D0GDR00JA017 M.RESISTOR W541 ERJ3GEY0R00V M.RESISTOR CHIP W542 ERJ3GEY0R00V M.RESISTOR CHIP W543 ERJ3GEY0R00V M.RESISTOR CHIP...
  • Page 46 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 47 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 48 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 49 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 50 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 51 T1150-4 STOP T1150-6 STOP T1150-11 STOP T1150-2 STOP T1150-12 STOP 33Vp-p (5usec.div.) 3.8Vp-p (2msec.div.) 560Vp-p (5usec.div.) 100Vp-p (5usec.div.) 18Vp-p (5usec.div.) T1150-13 STOP T1150-16 STOP Q1200-1 STOP IC2501-22,23,25 PLAY IC6001-13 STILL 40Vp-p (5usec.div.) 76Vp-p (5usec.div.) 0.4Vp-p (5usec.div.) 7.0Vp-p (2msec.div.) 5.0Vp-p (5msec.div.) IC6001-18 REC IC6001-50 REC/PLAY IC6001-52 REC/PLAY...
  • Page 52 T.REC CH UP S7505 S7506 T.PHOTO S.PHOTO SAFETY TAB IC1512 IC1511 (S-REEL SENSOR) (T-REEL SENSOR) TL6012 T-REEL TL6013 Q1501 D1501 Q1502 S1531 SENSOR SAFETY TAKE-UP SUPPLY PHOTO PHOTO TAB SW S-REEL NV-MV20GC/GCS/GM/GL/EE/GCU/GCF/GH SENSOR SENSOR SYSTEM CONTROL & SERVO BLOCK DIAGRAM...
  • Page 53 P5001 2FSC SP COM DD CYLINDER SQPB VIDEO HEAD P5001 SP R C CLOCK EXTERNAL PB LUMINANCE TO C CCD DRIVER SIGNAL INPUT LINE (NOT USED IN THESE MODELS) SYSTEM CONTROL S-VHS S-VHS PB NV-MV20GC/GCS/GM/GL/EE/GCU/GCF/GH LUMINANCE & CHROMINANCE BLOCK DIAGRAM...
  • Page 54 SECONDARY SIDE... NOTE2:THE DC VOLTAGE INDICATED IN PRIMARY SIDE IS SHOWN THE VOLTAGE WHEN INPUT AC IS 240V. NV-MV20GC/GCS/GM/ NOTE:DO NOT USE ANY PART NUMBER SHOWN ON THIS SCHEMATIC DIAGRAM FOR GL/EE/GCU/GCF/GH ORDERING.WHEN YOU ORDER A PART,PLEASE REFER TO PARTS LIST.
  • Page 55 TUNER 5V BACK UP 5V C7603 0.01 REG 5V VIDEO 5V TUNER 5V NV-MV20GC/GCS/GM/ GL/EE/GCU/GCF/GH IMPORTANT SAFETY NOTICE: NOTE:DO NOT USE ANY PART NUMBER SHOWN ON THIS POWER SUPPLY/RF COMPONENTS IDENTIFIED WITH THE MARK HAVE THE SPECIAL CHARACTERISTICS FOR SAFETY.
  • Page 56 S1531 2200 K0C111A00006 R6007 (A/B/C/E) TL6010 SENSOR C4583 0.01 D1501 C6111 B3EA00000072 R6006 C6005 ART V/H/N 50V3.3 K6006 R6016 R6011 0.01 BACK UP 5V B25 B26 B11 B12 B18 B19 B21 B22 NV-MV20GC/GCS/GM/GL/EE/GCU/GCF/GH SYSTEM CONTROL & SERVO SECTION SCHEMATIC DIAGRAM...
  • Page 57 C2511 C2510 C2512 R2523 R2515 R2514 R2516 C2509 16V22 NV-MV20GC/GCS/GM/ NV-MV20GC/GCS/GM/ GL/EE/GCU/GCF/GH GL/EE/GCU/GCF/GH SYSTEM CONTROL & SERVO SYSTEM CONTROL & SERVO NOTE:DO NOT USE ANY PART NUMBER SHOWN ON THIS SCHEMATIC DIAGRAM FOR SECTION SCHEMATIC DIAGRAM SECTION SCHEMATIC DIAGRAM ORDERING.WHEN YOU ORDER A PART,PLEASE REFER TO PARTS LIST.
  • Page 58 3900 3600 5100 9100 NV-MV20GC/GCS/GM/GL/EE/GCU/GCF/GH NOTE:DO NOT USE ANY PART NUMBER SHOWN ON THIS SCHEMATIC DIAGRAM FOR NOTE:THE MEASUREMENT MODE OF THE DC VOLTAGE ON THIS DIAGRAM IS STOP MODE. ORDERING.WHEN YOU ORDER A PART,PLEASE REFER TO PARTS LIST. TIMER SECTION SCHEMATIC DIAGRAM...
  • Page 59 R4601 TUNER 5V VIDEO 5V NV-MV20GC/GCS/GM/GL/EE/GCU/GCF/GH NOTE:THE MEASUREMENT MODE OF THE DC VOLTAGE IN THE BRACKETS( )ON THIS DIAGRAM IS RECORD MODE THE MEASUREMENT MODE OF THE DC VOLTAGE OUT OF THE BRACKETS ON THIS DIAGRAM IS PLAYBACK MODE WITH PAL COLOUR.(SP MODE) WITH PAL COLOUR SIGNAL.(SP MODE)
  • Page 60 270u 8200 C3012 C3011 0.22 6V47 R3029 8200 NV-MV20GC/GCS/GM/ GL/EE/GCU/GCF/GH LUMINANCE & CHROMINANCE /AUDIO SECTION NV-MV20GC/GCS/GM/GL/EE/GCU/GCF/GH NOTE:DO NOT USE ANY PART NUMBER SHOWN ON THIS SCHEMATIC DIAGRAM FOR SCHEMATIC DIAGRAM LUMINANCE & CHROMINANCE/AUDIO SECTION SCHEMATIC DIAGRAM ORDERING.WHEN YOU ORDER A PART,PLEASE REFER TO PARTS LIST.
  • Page 61 (VEP06F33P:NV-MV20GC/GCS/GM)(VEP06F33Q:NV-MV20GL)(VEP06F33R:NV-MV20EE)(VEP06F33S:NV-MV20GCU/GCF)(VEP06F33T:NV-MV20GH) P2501 P1531 TU7601 (C/D) P1101 TL3003 Q4082 QR4061 K5001 (C/D) K5002 QR4081 Q3202 P4002 P5001 Q4083 (C/D) IC2502 Q4081 (C/D) K1121,K1122:A QR4506 L1121:B/C/D/E (A/C/D/E) QR3008 QR3004 IC3001 P2571 Q3001 P4001 IC2501 QR4504 Q3003 (A/C/D/E) Q1501 Q1502 (A/C/D/E) IC6001 (A/B/C/E)
  • Page 62 TL7301 QR4082 TL7302 QR4504 TL7303 QR4506 TL7509 Integrated Circuit TL7510 IC1200 TLGND1 IC1511 TW1004 IC1512 TW2001 IC2501 TW2015 IC2502 TW3001 IC3001 Connector IC6001 P1101 IC6201 P1531 IC6301 P2501 IC7501 P2571 P4001 P4002 P5001 TU7601 ADDRESS INFORMATION NV-MV20GC/GCS/GM/GL/ EE/GCU/GCF/GH MAIN C.B.A.
  • Page 63 Reset/ No Terminal Name I/O Description P.OFF P.Failure Release 1 NC I Hi-Z fix. 2 CODE1 I AD input terminal for model setting. 3 CODE2 I AD input terminal for model setting. 4 T.S.CUREVE I Input terminal for "S-Curve" of Tuner AFC at channel selecting. REG 12V short detection signal.
  • Page 64 Reset/ No Terminal Name I/O Description P.OFF P.Failure Release 22 NC O Low fix. 23 NC I Low fix. 24 D.A.REC(H) O Recording control signal for the Linear Audio. 25 PAL 9H (H) O PAL 9H: High is output. Linear Audio REC/ERASE ON/OFF control terminal. (FULL ERASE ON/OFF control is combined with) *When recording the linear audio, the "Low"...
  • Page 65 Reset/ No Terminal Name I/O Description P.OFF P.Failure Release 50Hz Playback on SQPB: High output 42 PAL_SQPB Other than above : Low output Clock souce selection terminal at reset starting. 43 32K.START(L) *12/16MHz(High speed) :Connected to VCC (5V). *32KHz(Slow speed) :Connected to Vss (0V). 44 LC.OSC.IN I Input terminal of the LC Oscillation (For OSD dot clock) 45 LC.OSC.OUT...
  • Page 66 Reset/ No Terminal Name I/O Description P.OFF P.Failure Release Terminal for both NAVI Writing and OSD REC Writing. 1. During NAVI writing (During recording in JET NAVIGATOR is ON) At NAVI data "H" being written : High is output At NAVI data "L" being written : Low is output 64 VBI1/CHARA At except NAVI data being written : Low is output Low / Hi-Z...
  • Page 67 Reset/ No Terminal Name I/O Description P.OFF P.Failure Release Distinction terminal for the Video system. 1. In the VV mode. *"High" is input: Playback of a MESECAM recorded tape. *"Low" is input: Playback of other than MESECAM recorder tape. 2. In the EE mode. 89 MESECAM (H) *"High"...
  • Page 68 SYSTEM CONTROL & SERVO ICs DC VOLTAGE CHART (SP MODE) IC1511 IC1512 Ref. No. MODE STOP PLAY IC2501 Ref. No. MODE STOP 12.2 16.2 PLAY 12.3 16.3 12.2 16.3 12.2 16.2 12.3 16.2 3..9 Ref. No. IC2501 MODE STOP 12.2 PLAY 12.3 12.2...
  • Page 69 8 SCHEMATIC DIAGRAMS 8.1. POWER TRANSFORMER SECTION IN MAIN SCHEMATIC DIAGRAM 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 70 MA185 16.3 R1205 R1156 R1206 C1200 R1204 2200 C1152 R1203 R1202 0.01 2200 NV-MV20GC/GCS/GM/ SHOWN ON THIS SCHEMATIC DIAGRAM FOR GL/EE/GCU/GCF/GH PART,PLEASE REFER TO PARTS LIST. POWER TRANSFORMER SECTION SCHEMATIC DIAGRAM HE DC VOLTAGE ON THIS DIAGRAM IS STOP MODE.
  • Page 71 8.2. POWER SUPPLY/ RF SECTION IN MAIN SCHEMATIC DIAGRAM VIDEO MAIN SIGNAL PATH IN REC MODE P :TO POWER TRANSFORMER SECTION S :TO SYSTEM CONTROL & SERVO SECTION VIDEO MAIN SIGNAL PATH IN PLAYBACK MODE T :TO TIMER SECTION V :TO LUMINANCE & CHROMINANCE/AUDIO SECTION QR1342 UN2112 (POWER ON:ON)
  • Page 72 A COMPO AFC S-CURVE TUNER VIDEO L7603 TUNER 5V C7603 0.01 NV-MV20GC/GCS/GM/ GL/EE/GCU/GCF/GH NOTE:DO NOT USE ANY PART NUMBER SHOWN ON THIS POWER SUPPLY/RF SCHEMATIC DIAGRAM FOR ORDERING.WHEN YOU SECTION SCHEMATIC DIAGRAM ORDER A PART,PLEASE REFER TO PARTS LIST. GE ON THIS DIAGRAM IS STOP MODE.
  • Page 73 8.3. TIMER SECTION IN MAIN SCHEMATIC DIAGRAM P :TO POWER TRANSFORMER SECTION DP7501 A2BA00000211 R :TO POWER SUPPLY/RF SECTION S :TO SYSTEM CONTROL & SERVO SECTION S-VHSET P10 P11 P12 P13 P14 P15 R7526 HEATER (+) HEATER (-) D7501 C7501 R7525 MA4220N 35V10...
  • Page 74 3900 3600 5100 9100 STOP S7518 S7509 S7510 S7512 S7513 EVQ11G09K EVQ11G09K EVQ11G09K EVQ11G09K EVQ11G09K R7517 R7519 R7518 R7502 R7522 3900 3600 5100 9100 NV-MV20GC/GCS/GM/GL/EE/GCU/GCF/GH HOWN ON THIS SCHEMATIC DIAGRAM FOR PLEASE REFER TO PARTS LIST. TIMER SECTION SCHEMATIC DIAGRAM...
  • Page 75 8.4. SYSTEM CONTROL & SERVO SECTION IN MAIN SCHEMATIC DIAGRAM :TO POWER TRANSFORMER SECTION CAPSTAN SERVO SPEED LOOP CAPSTAN SERVO PHASE LOOP :TO POWER SUPPLY/RF SECTION :TO TIMER SECTION :TO LUMINANCE & CHROMINANCE/AUDIO SECTION IC1511 C2003 RPI303 R2563 R2561 (T-REEL SENSOR) R1513 R2001 C2561...
  • Page 76 RESET L POSI.SW1 POSI.SW2 POSI.SW3 TL7509 C6021 C6101 R6201 TW2001 0.01 3300 TL7510 TL6005 C6103 0.01 TL2502 SAFETY S1531 K0C111A00006 TL6010 K6006 R6016 R6011 0.01 B25 B26 B11 B12 B18 B19 B21 B22 NV-MV20GC/GCS/GM/GL/EE/GCU/GCF/GH SYSTEM CONTROL & SERVO SECTION SCHEMATIC DIAGRAM...
  • Page 77 6V220 C2513 C2511 C2510 C2512 R2523 R2515 R2514 R2516 C2509 16V22 NV-MV20GC/GCS/GM/ GL/EE/GCU/GCF/GH SYSTEM CONTROL & SERVO NOTE:DO NOT USE ANY PART NUMBER SHOWN ON THIS SCHEMATIC DIAGRA ORDERING.WHEN YOU ORDER A PART,PLEASE REFER TO PARTS LIST. SECTION SCHEMATIC DIAGRAM...
  • Page 78 CURR LIMIT CAP ET 1479 IC2502 CAP R/F C0DBZJG00005 (12V SWITCHING REG.) R2562 POWER ON D2501 P2501 (TO CYLINDER UNIT) PG (-) PG (+) NV-MV20GC/GCS/GM/ GL/EE/GCU/GCF/GH SYSTEM CONTROL & SERVO S SCHEMATIC DIAGRAM FOR SECTION SCHEMATIC DIAGRAM EFER TO PARTS LIST.
  • Page 79 8.5. LUMINANCE & CHROMINANCE/ AUDIO SECTION IN MAIN SCHEMATIC DIAGRA VIDEO MAIN SIGNAL PATH IN REC MODE VIDEO MAIN SIGNAL PATH :TO POWER TRANSFORMER SECTION :TO POWER SUPPLY/RF SECTION :TO SYSTEM CONTROL & SERVO SECTION JK3201 K2HA408B0053 (REAR JACK) AUDIO VIDEO AUDIO L3304...
  • Page 80 C3062 C4011 R4016 16V10 16V10 5.9) Q4083 C4601 2SD601A 16V10 PB:ON) C3066 R4017 R4013 R4014 4700 R4601 NV-MV20GC/GCS/GM/GL/EE/GCU/GCF/GH OF THE DC VOLTAGE OUT OF THE BRACKETS ON THIS DIAGRAM IS PLAYBACK MODE SP MODE) LUMINANCE & CHROMINANCE/AUDIO SECTION SCHEMATIC DIAGRAM...
  • Page 81 -10dB -10dB -10dB (1.9) (1.8) (2.4) (2.5) (1.7) (2.7) R3001 C3002 C3003 C3007 C3005 C3006 C3010 C3008 C3064 R3041 C3015 6200 50V4.7 C3013 C3004 R3020 L3001 R3002 150P 1500 270u 8200 R3029 8200 NV-MV20GC/GCS/GM/GL/EE/GCU/GCF/GH LUMINANCE & CHROMINANCE/AUDIO SECTION SCHEMATIC DIAGRAM...
  • Page 82 S-VHS PB TUNER VIDEO L3301 ART V/H/N C3012 C3011 0.22 6V47 NV-MV20GC/GCS/GM/ GL/EE/GCU/GCF/GH LUMINANCE & CHROMINANCE /AUDIO SECTION NOTE:DO NOT USE ANY PART NUMBER SHOWN ON THIS SCHEMATIC DIAGRAM FOR SCHEMATIC DIAGRAM ORDERING.WHEN YOU ORDER A PART,PLEASE REFER TO PARTS LIST.

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