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Panasonic NV-HV61GN Service Manual
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Panasonic NV-HV61GN Service Manual

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ORDER NO. MAV0404002C8
Video Cassette Recorder
NV-HV61GN / NV-HV61EE / NV-HV61GCU / NV-HV61GH / NV-
HV61GHT / NV-HV61PX
R4-MECHANISM
SPECIFICATIONS
1

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Summary of Contents for Panasonic NV-HV61GN

  • Page 1 ORDER NO. MAV0404002C8 Video Cassette Recorder NV-HV61GN / NV-HV61EE / NV-HV61GCU / NV-HV61GH / NV- HV61GHT / NV-HV61PX R4-MECHANISM SPECIFICATIONS...
  • Page 2 1. INTRODUCTION 1.1. INTRODUCTION This service manual contains technical information which will allow service personnel to understand and service this model. If the circuit is changed or modified, this information will be followed by supplementary service manual to be filed with original service manual. Note: 1.
  • Page 3 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-HV61GN NV-HV61EE NV-HV61GCU NV-HV61GH/GHT NV-HV61PX 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 4 4. Option Setting Data When IC6001 are replaced, all above listed data become not available. These data is backed up by using the power source of: *AC Connected: AC Power source *AC Disconnected: Back-up Battery (B7751) & Back-up Capacitor (C7752) [NOTE1] As for your reference, without inserting a tape into a VCR, you can confirm that the NAVI data that is back up with IC6001 as shown in the following steps.
  • Page 5 1. Disconnect the AC plug before removing the C.B.A. with Mechanism unit by referring to the Disassembly procedure. STEP2.REPLACE THE IC6001 1. Replace the IC6001. (Do not make a short circuit between IC6001- pin37 and other pins/Components.) STEP3.RESET THE IC6001 AT ONCE 1.
  • Page 6 press POWER button for turning the power to on from off to carry out the "Plug in Auto Tuner Preset". 4. Since other than the channels that can be stored by "Auto Tuning" operation are not available yet, preset manually by consulting the note of its available TV channels of which you took before.
  • Page 7 B1). Fig. B1 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 2.4. SERVICE CAUTION-2 2.4.1. CAUTION FOR AUTO TUNING 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 NOTE: 1. If the VCR is turned on with the antenna not connected, all channels are skipped. Therefore, firmly connect the antenna and then turn the VCR off and on again to execute Auto tuning. 2. When Auto Tuning is canceled halfway, Auto Tuning is not execute even if the VCR is turned off and then turned on again, In this case, Auto Tuning has to be restarted by the following procedures.
  • Page 10 2.4.3. REMOVAL OF CASSETTE TAPE When the cassette tape could not be uninstalled from an electrical malfunction, There are 2 ways to remove a cassette tape. 1. Removal by compulsory unloading. A. Press FF and EJECT button simultaneously for more than 3 seconds and set the Service Mode to 7.
  • Page 11 C. Stop unloading just before unloading would be completed as shown in Fig. Fig. S3 D. Then the tape becomes slack as shown in Fig. Fig. S4 E. Rotate the S-Reel by a small minus screwdriver (Fig. S5) to remove the slack tape as shown in Fig.
  • Page 12 Fig. S5 Fig. S6 F. Then unload again to remove the cassette tape as shown in Fig. Fig. S7 3. Removal by manual operations after uninstalling the mechanism,refer to the DISASSEMBLY METHOD of item3.1. A. Disconnect the AC plug, and remove the Top Panel, Front Panel and the Mechanism by referring to the Disassembly Procedures.
  • Page 13 C. Rotate the Main Cam Gear counter-clockwise (Fig. S9) until just before the unloading would be completed as shown in Fig. D. Rotate the Capstan Motor clockwise (Fig. S9) to remove the slack tape as shown in Fig. Fig. S9 E.
  • Page 14 G. Install the Loading Motor and tighten screw (S1) as shown in Fig. 2.4.4. CYLINDER UNIT REPLACEMENT NOTE: Replacing only Upper Cylinder unit of R4 Mechanism cannot be performed, as securing of RT gap is impossible out of factory, please replace the cylinder by whole Cylinder Unit. The Compatibility Adjustment should be performed after replacement ofthe DD Cylinder Unit.
  • Page 15 NOTE: When reassembling, perform the steps in the reverse order, and perform the TAPE INTERCHANGEABILITY ADJUSTMENT certainly after CYLINDER UNIT REPLACEMENT. 2.4.5. ATTENTION FOR REPLACING THE CYLINDER UNIT CAUTION: Handle the Cylinder Flexble Card with care. When it damaged, you should replace it with a new Cylinder Unit.
  • Page 16 4. Hook the Flexible Card to the FPC HOLDER. Fig. S13 NOTE: 1. When removing the FPC HOLDER, push stopper portion of the FPC HOLDER with a small minus screw driver and so on. And then pay attention for not to scratch the Cylinder and not to break the Head Chip.
  • Page 17 (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 [ for end users] for all VHS/S-VHS VCP and VCR.
  • Page 18 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 19 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 20 3.1.2. DETAIL OF DISASSEMBLY METHOD 1. REMOVAL OF THE TOP PANEL Remove 2 Screws (A) Remove 2 Screws (B) Fig.D2...
  • Page 21 2. REMOVAL OF THE BACK PANEL Remove 2 Screws (C) Remove Screw (D) Unlock 4 Tabs (E) Fig. D3...
  • Page 22 3. REMOVAL OF THE FRONT PANEL UNIT Unlock 7 Tabs (F) Fig. D4 4. REMOVAL OF THE FRONT C.B.A. Remove 2 Screws (G) Fig. D5 5. REMOVAL OF THE MECHANISM UNIT...
  • Page 23 Remove Screw (H) Remove 2 Screws (I) Remove Screw (J) Disconnect Cylinder Connector Disconnect A/C Head Connector Disconnect P1531 Fig. D6 6. REMOVAL OF THE MAIN C.B.A. Remove 4 Screws (K) Fig. D7...
  • Page 24 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. Fig. D8 7. SERVICING POSITION Install the Mechanism Unit on to the MAIN C.B.A.. Then fix a screw (I), and connect two frexible card Connectors (Cylinder connector, AC Head connector) and P1531 as shown in Fig.
  • Page 25 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 26 PROCEDURE F.I.P. DISPLAY 6. When the sequence of the automatic adjustment has been terminated, the following action has been made. * SUCCEED: The cassette tape is ejected. * ERROR: The "F20", "F21", "F22" or "F23"is displayed. Refer to next PG Shifter Adjustment Self-Diagnosis Indication Table regarding the details of the indications.
  • Page 27 4. ABBREVIATIONS 5. INPUT / OUTPUT CHART FOR IC6001 6. WAVEFORM TABLE & VOLTAGE CHART 6.1. WAVEFORM TABLE 6.2. VOLTAGE CHART 7. BLOCK DIAGRAMS 7.1. POWER BLOCK DIAGRAM 7.2. SYSTEM CONTROL & SERVO BLOCK DIAGRAM 7.3. LUMINANCE & CHROMINANCE BLOCK DIAGRAM 7.4.
  • Page 28 8.7. DECODER SECTION IN MAIN SCHEMATIC DIAGRAM (NV- HV61GN / GH / GHT / PX) 8.8. FRONT SCHEMATIC DIAGRAM 9. CIRCUIT BOARD ASSEMBLIES 9.1. MAIN C.B.A. 9.2. FRONT C.B.A. 10. EXPLODED VIEWS 10.1. CHASSIS PARTS SECTION...
  • Page 29 10.2. CASING PARTS SECTION...
  • Page 30 10.3. PACKING PARTS SECTION...
  • Page 31 11. REPLACEMENT PARTS LIST...
  • Page 32 11.1. CHASSIS PARTS SECTION / PARTS LIST Note: *All parts except parts mentioned [PAVC-SPC] in the Remarks column are supplied from PAVCSG. Parts mentioned [PAVC-SPC] are supplied from PAVC-SPC . Ref. No. Part No. Part Name & Description Remarks VEG1642-DKIT CYLINDER UNIT NV-HV61GH-S/ GHT-S/GN-S/PX-...
  • Page 33 Ref. No. Part No. Part Name & Description Remarks VMD4983 FLAT CABLE HOLDER VMA0L25 TOP PLATE VMD4255 SIDE PLATE (L) VMD4254 SIDE PLATE (R) UNIT VML3706 OPENER LEVER VXA7110 CASSETTE HOLDER UNIT VXL3160 MAIN SHAFT UNIT VHD1044 SCREW XYN3+C4FJ SCREW XTN26+7JFJ SCREW XTN26+7JFJ...
  • Page 34 Ref. No. Part No. Part Name & Description Remarks VGM1991 TOP PANEL HV61GCU-S/EE-S /GH-S/GHT-S/GN -S/PX-S VGM1992 TOP PANEL NV-HV61EE- VMP7569-1 CHASSIS FRAME VMP7574-1 BACK PANEL RYPV0030 FRONT PANEL (1) U NV-HV61GCU-S/ EE-S/GH-S/GHT- S/GN-S/PX-S RYPV0022 FRONT PANEL (1) U NV-HV61EE-K RKFV0009 DOOR NV-HV61GCU-S/ EE-S/GH-S/GHT-...
  • Page 35 B111 XTW3+6TR SCREW MAIN Ref. No. Part No. Part Name & Description Remarks B112 XTW3+6TR SCREW MAIN B113 XTW3+6TR SCREW MAIN B117 VHD1452-1 SCREW(L) B114 VHD1453-1 SCREW(S) B116 VHD1453-1 SCREW(S) B118 XTV26+5FR SCREW 11.3. PACKING PARTS SECTION / PARTS LIST Note: *All parts except parts mentioned [PAVC-SPC] in the Remarks column are supplied from PAVCSG.
  • Page 36 Remarks RQTV0006 O/I BOOK (ENGLISH/CANTONESE) NV-HV61GH- S/GHT-S RQTV0005 O/I BOOK (ENGLISH) NV-HV61PX- RQTV0016 O/I BOOK (ENGLISH/RUSSIAN) NV-HV61EE- S/EE-K/GCU-S RQTV0007 O/I BOOK (ENGLISH) NV-HV61GN- N2QAJB000086 REMOTE CONTROL ETR0051-5200 BATTERY COVER VJA1124 RF CABLE NV-HV61GH-S/ GHT-S/GN-S/PX- VJA1123 RF CABLE NV-HV61EE-S/EE -K/GCU-S RJA0053-3X...
  • Page 37 “*1”, “*2”, “*3”, “*4”, “*5”, “*6” in the Remarks column shows the models as follows. “*1” : NV-HV61EE-S/EE-K “*2” : NV-HV61GCU-S “*3” : NV-HV61GH-S “*4” : NV-HV61GHT-S “*5” : NV-HV61GN-S “*6” : NV-HV61PX-S Ref. No. Part No. Part Name & Description...
  • Page 38 Ref. No. Part No. Part Name & Description Remarks VEP06F53F MAIN C.B.A. (RTL) *1 VEP06F53G MAIN C.B.A. (RTL) *2 VEP06F53H MAIN C.B.A. (RTL) *3,*4 VEP06F53E MAIN C.B.A. (RTL) *5 VEP06F53J MAIN C.B.A. (RTL) *6 B7751 VSB0205 BATTERY C1121 ECQU2A683MVA POLYESTER CAPACITOR C1122 F1BAF331A013 CERAMIC CAP...
  • Page 39 Ref. No. Part No. Part Name & Description Remarks C2513 ECJ1VF1A105Z CHIP CAPACITOR C2515 ECJ1VF1H103Z CHIP CAPACITOR C2518 ECJ1VB1H102K CHIP CAPACITOR C2519 ECJ1VF1H104Z CHIP CAPACITOR C2520 F1H1C104A065 CHIP CAPACITOR C2551 ECJ1VB1C563K CHIP CAPACITOR C2552 ECJ1VB1C563K CHIP CAPACITOR C2561 ECJ1VB1C563K CHIP CAPACITOR C2562 ECJ1VB1C563K CHIP CAPACITOR...
  • Page 40 Ref. No. Part No. Part Name & Description Remarks C3065 F1H1C104A065 CHIP CAPACITOR C3066 F1H1C104A065 CHIP CAPACITOR C4010 ECEA1CKA100B ELECTROLYTIC CAPACITOR C4016 ECJ1VC1H150J CHIP CAPACITOR *1,*2 C4018 ECEA0JKA220B ELECTROLYTIC CAPACITOR C4041 ECEA1EKA4R7B ELECTROLYTIC CAPACITOR C4042 ECEA1EKA4R7B ELECTROLYTIC CAPACITOR C4051 ECEA0JKA221B ELECTROLYTIC CAPACITOR *1,*2 C4052...
  • Page 41 C4537 ECJ2VC1H560G CHIP CAPACITOR...
  • Page 42 Ref. No. Part No. Part Name & Description Remarks C4538 ECJ1VF1H103Z CHIP CAPACITOR C4581 ECQB1H473JF3 AXIAL CAPACITOR C4582 ECQB1H473JF3 AXIAL CAPACITOR C4583 ECJ1VF1H103Z CHIP CAPACITOR C4591 ECJ1VB1H102K CHIP CAPACITOR *1,*2 C4601 ECEA1CKA100B ELECTROLYTIC CAPACITOR C4603 F1H1H152A219 CHIP CAPACITOR C5001 ECJ1VB1H103K CHIP CAPACITOR C5002 ECJ1VB1H103K...
  • Page 43 Ref. No. Part No. Part Name & Description Remarks C7313 ECEA1CKA100B ELECTROLYTIC CAPACITOR *3,*4,*5,*6 C7314 ECJ1VF1C104Z CHIP CAPACITOR *3,*4,*5,*6 C7317 ECEA1CKA470B ELECTROLYTIC CAPACITOR *3,*4,*5,*6 C7318 ECEA1CKA100B ELECTROLYTIC CAPACITOR *3,*4,*5,*6 C7323 ECJ1VF1C104Z CHIP CAPACITOR *3,*4,*5,*6 C7324 ECJ1VF1C104Z CHIP CAPACITOR *3,*4,*5,*6 C7325 ECJ2VC1H680J CHIP CAPACITOR *3,*4,*5,*6...
  • Page 44 D2002 B0AAED000003 DIODE...
  • Page 45 Ref. No. Part No. Part Name & Description Remarks D2503 MAZ4160NMF DIODE D4501 MA2C165001VT DIODE D6302 B0JACE000001 DIODE D6303 MAZ4130NLF DIODE D6305 MAZ4062NLF DIODE D6306 MAZ4056NHF DIODE D6307 MAZ4056NHF DIODE D7501 MAZ4240NMF DIODE D7602 MAZ4300NMF DIODE D7751 B0JACE000001 DIODE D7752 MA2C700A0F DIODE D7753...
  • Page 46 Ref. No. Part No. Part Name & Description Remarks L1260 G0A220G00018 COIL L3001 G0C271JA0019 CHOKE COIL L3004 G1C120J00001 CHIP COIL L3301 G0C150JA0019 COIL L3302 G0C680JA0019 COIL L3303 G0C330JA0019 COIL L3304 G0C680JA0019 COIL L4081 G0C471KA0004 COIL L4501 G0C1R2J00004 COIL L4502 G0C391JA0019 COIL L5001 G0C560JA0019...
  • Page 47 Q1152 2SC3311ASA TRANSISTOR...
  • Page 48 Ref. No. Part No. Part Name & Description Remarks Q1153 B1DEEQ000001 TRANSISTOR Q1200 B3PBA0000078 PHOTO COUPLER Q1341 B1AAGD000006 TRANSISTOR Q1342 2SD0601A0L CHIP TRANSISTOR Q1351 B1AAGD000006 TRANSISTOR Q1352 B1AAGD000006 TRANSISTOR Q1354 B1AAGD000006 TRANSISTOR Q1501 PNA2604M01VT PHOTO TRANSISTOR Q1502 PNA2604M01VT PHOTO TRANSISTOR Q3001 2SD0601A0L CHIP TRANSISTOR...
  • Page 49 R1502 ERJ3GEYJ273V CHIP RESISTOR...
  • Page 50 Ref. No. Part No. Part Name & Description Remarks R1503 ERDS2TJ151T CARBON RESISTOR R1511 ERJ3GEYJ273V CHIP RESISTOR R1512 ERJ3GEYJ273V CHIP RESISTOR R1513 ERJ6GEYJ121V CHIP RESISTOR R2001 ERJ3GEYJ392V CHIP RESISTOR R2002 ERJ3GEYJ105V CHIP RESISTOR R2099 ERJ3GEYJ682V CHIP RESISTOR R2501 ERJ6GEYJ1R2V CHIP RESISTOR R2503 ERJ6GEYJ1R5V CHIP RESISTOR...
  • Page 51 Ref. No. Part No. Part Name & Description Remarks R4063 ERJ3GEYJ331V CHIP RESISTOR R4071 ERJ3GEYJ153V CHIP RESISTOR R4073 ERJ3GEY0R00V CHIP JUMPER *3,*4,*5,*6 R4073 ERJ3GEYJ471V CHIP RESISTOR *1,*2 R4074 ERJ3GEY0R00V CHIP JUMPER *3,*4,*5,*6 R4074 ERJ3GEYJ471V CHIP RESISTOR *1,*2 R4075 ERJ3GEYJ471V CHIP RESISTOR R4076 ERJ3GEYJ471V CHIP RESISTOR...
  • Page 52 Ref. No. Part No. Part Name & Description Remarks R6017 ERJ3GEYJ222V CHIP RESISTOR R6018 ERJ3GEYJ103V CHIP RESISTOR R6020 ERJ3GEYJ103V CHIP RESISTOR *2,*5,*6 R6020 ERJ3GEYJ123V CHIP RESISTOR *3,*4 R6021 ERJ3GEYJ103V CHIP RESISTOR *1,*3,*4 R6021 ERJ3GEYJ123V CHIP RESISTOR R6022 ERJ3GEYJ102V CHIP RESISTOR R6023 ERJ3GEYJ332V CHIP RESISTOR...
  • Page 53 Ref. No. Part No. Part Name & Description Remarks R7523 ERJ3GEYJ512V CHIP RESISTOR R7525 ERDS2TJ391T CARBON RESISTOR R7526 ERDS2TJ101T CARBON RESISTOR R7527 ERJ3GEYJ203V CHIP RESISTOR R7528 ERDS2TJ101T CARBON RESISTOR R7529 ERDS2TJ103T CARBON RESISTOR R7601 ERDS2TJ331T CARBON RESISTOR R7606 J0JCC0000124 CHIP COIL R7607 J0JCC0000124 CHIP COIL...
  • Page 54 W519 ERJ3GEY0R00V CHIP JUMPER...
  • Page 55 Ref. No. Part No. Part Name & Description Remarks W520 ERJ3GEY0R00V CHIP JUMPER W521 ERJ3GEY0R00V CHIP JUMPER W522 ERJ3GEY0R00V CHIP JUMPER W523 ERJ6GEY0R00V CHIP JUMPER W524 ERJ3GEY0R00V CHIP JUMPER W526 ERJ3GEY0R00V CHIP JUMPER W527 ERJ6GEY0R00V CHIP JUMPER W528 ERJ3GEY0R00V CHIP JUMPER W529 ERJ6GEY0R00V CHIP JUMPER...
  • Page 56 Ref. No. Part No. Part Name & Description Remarks ZA1101 EYF52BC FUSE HOLDER ZA1102 EYF52BC FUSE HOLDER MISCELLANEOUS VMD4258 PHOTO TRANSISTOR HOLDER VMD4258 PHOTO TRANSISTOR HOLDER RJFV0002 FIP HOLDER VEP04857A FRONT C.B.A. (RTL) *1,*2 VEP04857B FRONT C.B.A. (RTL) *3,*4,*5,*6 C4901 ECJ1VC1H471J CHIP CAPACITOR *1,*2...
  • Page 57 D.FM REC NOTE:DO NOT USE ANY PART NUMBER SHOWN ON THIS NV-HV61GN/EE/GCU/GH/GHT/PX 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 SCHEMATIC DIAGRAM FOR ORDERING.WHEN YOU...
  • Page 58 FRONT AUDIO (R) P3301-4 P3301-3 FRONT AUDIO (L) P3301-2 P3301-1 FRONT VIDEO C4902 C4901 470P 470P (B/C) NOTE:DO NOT USE ANY PART NUMBER SHOWN ON THIS NV-HV61GN/EE/GCU/GH/GHT/PX SCHEMATIC DIAGRAM FOR ORDERING.WHEN YOU FRONT SCHEMATIC DIAGRAM ORDER A PART,PLEASE REFER TO PARTS LIST.
  • Page 59 SECONDARY SIDE... NOTE2:THE DC VOLTAGE INDICATED IN PRIMARY SIDE IS SHOWN THE VOLTAGE WHEN INPUT AC IS 240V. NV-HV61GN/EE/GCU/GH/GHT/PX 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 60 N.SW 5V REG 5V VIDEO 5V TUNER 5V AUDIO 5V NV-HV61GN/EE/GCU/GH/GHT/PX NOTE:DO NOT USE ANY PART NUMBER SHOWN ON THIS SCHEMATIC DIAGRAM FOR ORDERING.WHEN YOU POWER SUPPLY/RF NOTE:THE MEASUREMENT MODE OF THE DC VOLTAGE ON THIS DIAGRAM IS STOP MODE.
  • Page 61 FM MUTE R6021 TL2502 (A/C/D/E) Q1501 Q1502 10K:B/D SAFETY PNA2604M01 PNA2604M01 12K:E (T-PHOTO) (S-PHOTO) S1531 K0C111A00006 R6007 (B/D/E) TL6010 SENSOR D1501 C6111 B3EA00000072 R6006 C6005 ART V/H/N 50V3.3 K6006 0.01 BACK UP 5V NV-HV61GN/EE/GCU/GH/GHT/PX SYSTEM CONTROL & SERVO SECTION SCHEMATIC DIAGRAM...
  • Page 62 R2523 R2515 R2514 R2516 C2509 16V22 NV-HV61GN/EE/GCU/GH/GHT/PX SYSTEM CONTROL & SERVO NV-HV61GN/EE/GCU/GH/GHT/PX NOTE:DO NOT USE ANY PART NUMBER SHOWN ON THIS SCHEMATIC DIAGRAM FOR SECTION SCHEMATIC DIAGRAM SYSTEM CONTROL & SERVO SECTION SCHEMATIC DIAGRAM ORDERING.WHEN YOU ORDER A PART,PLEASE REFER TO PARTS LIST.
  • Page 63 3900 3600 5100 9100 NV-HV61GN/EE/GCU/GH/GHT/PX 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 64 C4011 TUNER 5V VIDEO 5V NV-HV61GN/EE/GCU/GH/GHT/PX 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 65 270µ 8200 C3012 C3011 0.22 6V47 NV-HV61GN/EE/GCU/GH/GHT/PX LUMINANCE & CHROMINANCE/AUDIO NV-HV61GN/EE/GCU/GH/GHT/PX NOTE:DO NOT USE ANY PART NUMBER SHOWN ON THIS SCHEMATIC DIAGRAM FOR SECTION SCHEMATIC DIAGRAM LUMINANCE & CHROMINANCE/AUDIO SECTION SCHEMATIC DIAGRAM ORDERING.WHEN YOU ORDER A PART,PLEASE REFER TO PARTS LIST.
  • Page 66 FRONT C.B.A. Connector (VEP04857A:NV-HV61GN/GH/GHT/PX) P4951 ADDRESS INFORMATION (VEP04857B:NV-HV61EE/GCU) P4951 JK4951 (B/C) NV-HV61GN/EE/GCU/GH/GHT/PX FRONT C.B.A.
  • Page 67 (VEP06F53F:NV-HV61GN)(VEP06F53G:NV-HV61EE)(VEP06F53H:NV-HV61GCU)(VEP06F53J:NV-HV61GH/GHT)(VEP06F53K:NV-HV61PX) TL4506 (B/C) TL4504 TL4505 P1531 TU7601 P2501 TL4503 TL3003 Q4082 QR4061 (B/C) Q3202 QR4081 (B/C) P1101 (B/C) P5001 TL3002 P4002 Q4083 (B/C) TL4511 IC2502 Q4081 IC4501 TL4507 (B/C/D/E) TW4002 QR4651 IC3001 QR4505 TW2001 P2571 (B/C) QR4506 QR4504 P4001 Q3001...
  • Page 68 Integrated Circuit TL7509 IC1200 TL7510 IC1511 TLGND1 IC1512 TW1004 IC2501 TW1343 IC2502 TW2001 IC3001 TW2002 IC4501 TW3001 IC6001 TW3002 IC6201 TW4002 IC6301 TW4501 IC7301 TW4502 Connector IC7501 P1101 P1531 P2501 P2571 P3301 P4001 P4002 P5001 TU7601 ADDRESS INFORMATION NV-HV61GN/EE/GCU/GH/GHT/PX MAIN C.B.A.
  • Page 69 Reset/ No Terminal Name I/O Description P.OFF P.Failure Release Port for scanning line control: PROGRESSIVE TV scanning line 628: H scanning line 624: L 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"...
  • Page 70 Reset/ No Terminal Name I/O Description P.OFF P.Failure Release 22 NC O Low fix. Enforced Normal selection signal and Audio Automatic Adjustment Trigger Input Terminal 23 ABS_NORMAL *To turn audio into normal: Low (During ADUBPS, HiFi Audio envelope deterioration) *Others: High Recording on/off control signal terminal for Linear audio.
  • Page 71 2. Other than OSD REC: High-Z. (For NV-HV61GN) High fix. 61 SW2 (For other than NV-HV61GN) AUDIO SYSTEM = BG, DK: High is output. AUDIO SYSTEM = I, M: Low is output. AGC gain selection signal for tuner CH selection.
  • Page 72 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 73 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 74 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 75 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 76 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 77 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 78 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 79 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 80 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 81 D1152 PC123ZY2 MA185 16.3 R1205 R1156 R1206 C1200 R1204 2200 C1152 R1203 R1202 0.01 2200 NV-HV61GN/EE/GCU/GH/GHT/PX WN ON THIS SCHEMATIC DIAGRAM FOR T,PLEASE REFER TO PARTS LIST. POWER TRANSFORMER SECTION SCHEMATIC DIAGRAM C VOLTAGE ON THIS DIAGRAM IS STOP MODE.
  • Page 82 8.2. POWER SUPPLY/ RF SECTION IN MAIN SCHEMATIC DIAGRAM VIDEO MAIN SIGNAL PATH IN REC MODE :TO POWER TRANSFORMER SECTION :TO SYSTEM CONTROL & SERVO SECTION VIDEO MAIN SIGNAL PATH IN PLAYBACK MODE :TO TIMER SECTION :TO LUMINANCE & CHROMINANCE/AUDIO SECTION :TO Hi-Fi AUDIO SECTION :TO DECODER SECTION QR1342...
  • Page 83 A COMPO SIF/QPSK K7616 AFC S-CURVE TUNER VIDEO L7603 TUNER 5V C7603 0.01 NV-HV61GN/EE/GCU/GH/GHT/PX NOTE:DO NOT USE ANY PART NUMBER SHOWN ON THIS SCHEMATIC DIAGRAM FOR ORDERING.WHEN YOU POWER SUPPLY/RF ORDER A PART,PLEASE REFER TO PARTS LIST. SECTION SCHEMATIC DIAGRAM...
  • Page 84 8.3. TIMER SECTION IN MAIN SCHEMATIC DIAGRAM DP7501 A2BA00000215 :TO POWER TRANSFORMER SECTION :TO POWER SUPPLY/RF SECTION :TO SYSTEM CONTROL & SERVO SECTION S-VHS R7528 R7526 HEATER(+) C7504 0.01 HEATER(-) D7501 C7501 R7525 MA4240N 35V10 UNREG -29V C7506 IC7501 M35502AFP S.DATA S.CLOCK C7502...
  • Page 85 S7512 S7513 EVQ11G09K EVQ11L09B EVQ11G09K EVQ11G09K R7517 R7519 R7518 R7502 R7522 3900 3600 5100 9100 NV-HV61GN/EE/GCU/GH/GHT/PX NOT USE ANY PART NUMBER SHOWN ON THIS SCHEMATIC DIAGRAM FOR DERING.WHEN YOU ORDER A PART,PLEASE REFER TO PARTS LIST. TIMER SECTION SCHEMATIC DIAGRAM...
  • Page 86 8.4. SYSTEM CONTROL & SERVO SECTION IN MAIN SCHEMATIC DIAGRAM P :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 A :TO Hi-Fi AUDIO SECTION D :TO DECODER SECTION IC1511 C2003...
  • Page 87 A VDD POSI.SW1 AD VDD POSI.SW2 POSI.SW3 TL7509 C6021 C6101 R6201 TW2001 0.01 3300 TL7510 TL4552 TL6005 C6103 0.01 TL2502 R6021 10K:B/D SAFETY 12K:E S1531 K0C111A00006 (B/D/E) TL6010 R6006 C6005 50V3.3 K6006 0.01 NV-HV61GN/EE/GCU/GH/GHT/PX SYSTEM CONTROL & SERVO SECTION SCHEMATIC DIAGRAM...
  • Page 88 PG/FG COMPOSER PG OUT R2520 R2551 R2552 R2501 R2503 C2518 C2508 1000P 1800P C2551 C2552 0.056 0.056 R2522 R2521 C2501 C2502 6V220 C2513 C2511 C2510 C2512 R2523 R2515 R2514 R2516 C2509 16V22 NV-HV61GN/EE/GCU/GH/GHT/PX SYSTEM CONTROL & SERVO SECTION SCHEMATIC DIAGRAM...
  • Page 89 R2562 POWER ON P2501 (TO CYLINDER UNIT) PG (-) PG (+) NV-HV61GN/EE/GCU/GH/GHT/PX SYSTEM CONTROL & SERVO NOTE:DO NOT USE ANY PART NUMBER SHOWN ON THIS SCHEMATIC DIAGRAM FOR SECTION SCHEMATIC DIAGRAM ORDERING.WHEN YOU ORDER A PART,PLEASE REFER TO PARTS LIST.
  • Page 90 8.5. LUMINANCE & CHROMINANCE/ AUDIO SECTION IN MAIN SCHEMATIC DIAGRA VIDEO MAIN SIGNAL PATH IN REC MODE VIDEO MAIN SIGNAL PATH IN P :TO POWER TRANSFORMER SECTION R :TO POWER SUPPLY/RF SECTION S :TO SYSTEM CONTROL & SERVO SECTION :TO Hi-Fi AUDIO SECTION JK3201 D :TO DECODER SECTION K2HA612B0045...
  • Page 91 BAND IC3001 Q4082 HA118425AF 2SD1149 (PB:ON) C4010 C3062 16V10 16V10 15.9) Q4083 R4017 R4016 R4011 R4012 2SD601A 4700 (PB:ON) C3066 C4011 NV-HV61GN/EE/GCU/GH/GHT/PX C VOLTAGE OUT OF THE BRACKETS ON THIS DIAGRAM IS PLAYBACK MODE LUMINANCE & CHROMINANCE/AUDIO SECTION SCHEMATIC DIAGRAM...
  • Page 92 -6dB -10dB -10dB -10dB (1.9) (1.8) (2.4) (2.5) (1.7) (2.7) R3001 C3002 C3003 C3007 C3005 C3006 C3010 C3008 C3009 R3041 C3015 6200 50V4.7 C3013 C3004 R3020 L3001 R3002 R3037 150P 1500 270µ 8200 NV-HV61GN/EE/GCU/GH/GHT/PX LUMINANCE & CHROMINANCE/AUDIO SECTION SCHEMATIC DIAGRAM...
  • Page 93 6800 4700 S-VHS PB L3301 15µ ART V/H/N C3012 C3011 0.22 6V47 NV-HV61GN/EE/GCU/GH/GHT/PX LUMINANCE & CHROMINANCE/AUDIO NOTE:DO NOT USE ANY PART NUMBER SHOWN ON THIS SCHEMATIC DIAGRAM FOR SECTION SCHEMATIC DIAGRAM ORDERING.WHEN YOU ORDER A PART,PLEASE REFER TO PARTS LIST.
  • Page 94 8.6. Hi-Fi AUDIO SECTION IN MAIN SCHEMATIC DIAGRAM AUDIO MAIN SIGNAL PATH IN REC MODE AUDIO MAIN SIGNAL PATH IN PLAYB :TO POWER SUPPLY/RF SECTION :TO SYSTEM CONTROL & SERVO SECTION :TO LUMINANCE & CHROMINANCE/AUDIO SECTION D :TO DECODER SECTION C4536 C4517 0.01...
  • Page 95 R4586 R4532 4700 C4582 0.047 C4505 6V33 NOTE:DO NOT USE ANY PART NUMBER SHOWN ON THIS NV-HV61GN/EE/GCU/GH/GHT/PX ON THIS DIAGRAM IS PLAYBACK MODE SCHEMATIC DIAGRAM FOR ORDERING.WHEN YOU Hi-Fi AUDIO SECTION SCHEMATIC DIAGRAM ORDER A PART,PLEASE REFER TO PARTS LIST.
  • Page 96 8.7. DECODER SECTION IN MAIN SCHEMATIC DIAGRAM (NV-HV61GN/GH/GHT/ :TO POWER SUPPLY/RF SECTION :TO SYSTEM CONTROL & SERVO SECTION :TO LUMINANCE & CHROMINANCE/AUDIO SECTION :TO Hi-Fi AUDIO SECTION C7332 SIF2 R7307 C7333 INPUT SWITCH VREF1 AGC, L7301 C7301 R7301 2.2µ 0.01...
  • Page 97 SWITCH OUTPUT BUFFERS IC7301 TDA9874AH R7309 LB7302 C7317 J0JCC0000124 16V47 TL7302 TL7303 C7314 TL7301 NV-HV61GN/GH/GHT/PX OT USE ANY PART NUMBER SHOWN ON THIS SCHEMATIC DIAGRAM FOR ERING. WHEN YOU ORDER A PART,PLEASE REFER TO PARTS LIST. DECODER SECTION SCHEMATIC DIAGRAM...
  • Page 98 FRONT AUDIO (R) P3301-4 P3301-3 FRONT AUDIO (L) P3301-2 P3301-1 FRONT VIDEO C4902 C4901 470P 470P (B/C) NOTE:DO NOT USE ANY PART NUMBER SHOWN ON THIS NV-HV61GN/EE/GCU/GH/GHT/PX SCHEMATIC DIAGRAM FOR ORDERING.WHEN YOU FRONT SCHEMATIC DIAGRAM ORDER A PART,PLEASE REFER TO PARTS LIST.
  • Page 100 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 101 Hi-Fi (B/C) P5001 IC3001 AUDIO HEAD P5001 MUTE FROM TUNER/ TUNER AUDIO (N) DECODER FM MODULATOR/ DEMODULATOR NORMAL P4002 MUTE SELECT SWITCH NORMAL AUDIO HEAD & P4002 MUTE MUTE SWITCH TRAP FROM SYSTEM FM MUTE NV-HV61GN/EE/GCU/GH/GHT/PX CONTROL AUDIO BLOCK DIAGRAM...
  • Page 102 TO SYSTEM BACK UP 5V CONTROL TW1004 IC6301 QR1342 TO SERVO 5V SW TO SERVO IC1200 38V SW CYLINDER VG REG 5V Q1200 (IC2501) REG. (IC2501) PHOTO SHUNT COUPLER REG. Q1342 FROM SYSTEM POWER ON CONTROL(IC6001) PRIMARY NV-HV61GN/EE/GCU/GH/GHT/PX POWER BLOCK DIAGRAM...
  • Page 103 8 T.PHOTO 7 S.PHOTO 27 SAFETY TAB IC1512 IC1511 (S-REEL SENSOR) (T-REEL SENSOR) TL6012 80 T-REEL TL6013 Q1501 D1501 Q1502 S1531 SENSOR SAFETY TAKE-UP SUPPLY TAB SW PHOTO PHOTO 79 S-REEL SENSOR SENSOR NV-HV61GN/EE/GCU/GH/GHT/PX SYSTEM CONTROL & SERVO BLOCK DIAGRAM...
  • Page 104 P5001 2FSC LP/EP COM DD CYLINDER SQPB VIDEO HEAD P5001 LP/EP 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-HV61GN/EE/GCU/GH/GHT/PX LUMINANCE & CHROMINANCE BLOCK DIAGRAM...
  • Page 105 TL7303 C7314 TL7301 DO NOT USE ANY PART NUMBER SHOWN ON THIS SCHEMATIC DIAGRAM FOR NV-HV61GN/GH/GHT/PX NOTE: 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.
  • Page 106 Order No.VRD0202010C8 Video Cassette Recorder R4-MECHANISM-CHASSIS SPECIFICATIONS INRTODUCTION The R4-Mechanism chassis are built in several Panasonic VHS Video Cassette Recorders from year 2002. 2002 Matsushita Electric Industrial Co., Ltd. All rights reserved. Unauthorized copying and distribution is a violation of law.
  • Page 107 CONTENTS 1.OUT LINE OF R4 MECHANISM..……………………………………………………………………….….…3 1-1.DIFFERENCE BETWEEN Z-MECHANISM AND R4-MECHANISM..…………………….……..… 3 1-2.THE TAPE TRANSPORT PATH...…………………………………………………………………..…..3 1-3.PARTS NAME OF R4 MECHANISM……………………………………………………………….…..4 1-4.NEW DD CYLINDER UNIT.……………………………………………………………………….…… 6 1-5.PG SHIFTER AUTOMATIC ADJUSTMENT.…………………………………………………….…… 7 2.REMOVAL OF CASSETTE TAPE…………………………………………………………………..….……..9 3.REMOVAL OF CASSETTE HOLDER UNIT & MECHANISM CHASSIS………….………………….…11 3-1.REMOVAL OF MECHANNISM CHASSIS UNIT…………………………………………………….11 3-2.REMOVAL OF CASSETTE HOLDER UNIT..…………………………………………………….….11 4.DISASSEMBLY/ASSEMBLY METHOD FOR MECHANISM ……………………….…………………….12...
  • Page 108 1. OUTLINE OF R4 MECHANISM 1-1.DIFFERENCE BETWEEN Z-MECHANISM AND R4-MECHANISM Item Z-Mechanism R4-Mechanism Frame The sheet metal frame The sheet metal frame. The mechanism Spacer (R) & (L) for mechanism mounting are added. Rear Panel ABS plastic Sheet metal Front Panel Unit Standard Removal of the front panel becomes easy because of decreasing the hooking...
  • Page 109 1-3.PARTS NAME OF R4-MECHANISM Fig.M2...
  • Page 110 Ref. No. Part Name Ref. No. Part Name CYLINDER UNIT SCREW CAPSTAN UNIT SCREW FE HEAD SCREW INTERMEDIATE GEAR SCREW MAIN CAM GEAR SCREW IDLER GEAR SCREW IDLER GEAR SCREW CHANGE GEAR SCREW REEL TABLE SCREW REEL TABLE SCREW CAPSTAN BELT SCREW CHANGE GEAR SPRING SCREW...
  • Page 111 1-4. NEW DD CYLINDER UNIT Three phases sensor-less RDD system instead of Matsushita original GLDD/UDD system is adopted for standardization. NOTE: Replacing only Upper Cylinder unit of RDD cannot be performed, as securing of RT gap is impossible in a place other than factory, replace the cylinder as a whole RDD Cylinder Unit.
  • Page 112 1-5. PG SHIFTER AUTOMATIC ADJUSTMENT The PG Shifter Adjustment is performed automatically on this VCR. The PG Shifter Adjustment should be performed after replacement of the DD Cylinder, System Control Microprocessor and Main C.B.A. 1-5-(1). ADJUSTMENT PROCEDURE PROCEDURE F.I.P. DISPLAY Turn on the Service Mode 1.Press the FF key and the EJECT key simultaneously for more than 3 0 00 00...
  • Page 113 1-5-2. X-VALUE and LINEARITY (P2 and P3 Posts) ADJUSTMENT 1. Set the Auto Tracking to off. (1) Press the FF key and the EJECT key simultaneously for more than 3 seconds. (2) While keep pressing FF key, press the EJECT key in twice. 2.
  • Page 114 2. REMOVAL OF CASSETTE TAPE d. Then the tape becomes slack as shown in Fig.S4. When the cassette tape could not be ejected from an electrical malfunction, There are 2 ways to remove a cassette tape. 1. Removal by compulsory unloading. a.
  • Page 115 f. Then unload again to remove the cassette tape as shown in Sig.S7. Capstan Motor Main Cam Gear Fig.S7 Fig.S9 3. Removal by manual operations after removing the Rotate the Main Cam Gear counter-clockwise again Mechanism Unit. (Fig.S7) to remove the cassette-tape as shown in Disconnect the AC plug, and remove the Top Panel, Fig.S8.
  • Page 116 3. REMOVAL CASSETE HOLDER UNIT & MECHANISM CHASSIS 3-2. REMOVAL OF CASSETTE HOLDER 3-1. REMOVAL OF MECHANISM CHASSIS UNIT UNIT 1. Remove the Top Panel and the Front Panel. 1. Remove 2 Red Screws and unlock 3 Locking tabs to remove the Cassette Holder.
  • Page 117 4. DISASSEMBLY /ASSEMBLY Idler Arm Unit METHOD FOR MECHANISM 4-1. DISASSEMBLY OF MECHANISM Remove Take-up Brake Spring, Take-up Brake Arm and Take-up Reel Table. Take-up Reel Table LED Prism Idler Gear Fig.D4 Remove Tension Spring Take-up Brake Spring Take-up Brake Arm Fig.D1 Take-up Brake Arm Unit Take-up Reel Table...
  • Page 118 Remove Cut Washer of the Main Cam Gear, and remove Main Cam Gear and Sector Gear Unit. Main Cam Gear Tension Arm Unit Supply Reel Table Supply Brake Arm unit Sector Gear Unit Fig.D7 Cut Washer Remove Opener Piece, Pinch Arm Unit and P5 Arm Unit Fig.D10 in order.
  • Page 119 Remove the Cut Washer, and push the Main Lever rightward to the limit and remove the Main Lever, and Supply Loading Arm Unit turn over the Mechanism Chassis and remove the Pinch Charge Arm shown in Fig.D8. Cut Washer Loading Loading Take-up Loading Arm Unit Fig.D16...
  • Page 120 Torque Clutch (14) Remove a Screw for A/C Head Unit, and remove the A/C Head Unit. A/C Head Unit Intermediate Gear Change Gear Fig.D19 (13) Remove 2 Screws for the Stator and 3 Screws for the Capstan Unit, and remove the Capstan Unit. 2 Screws for Stator A Screw for A/C Head Unit Fig.D22...
  • Page 121 4-2. ASSEMBLY PHASE (1) Install the Loading Motor Unit not to scratch the Worm ADJUSTMENT OF MECHANISM Gear, and tighten the Screw for the Loading Motor Unit. Loading Motor Unit Worm Gear NOTE: When install the replacement parts to Chassis ; apply the Floil Grease (VFK1298A).
  • Page 122 Pinch Arm Unit Opener Piece 3 Screws for Capstan Unit Fig.A5 2 Screws for Stator P5 Arm Pinch Charge Arm Fig.A9 Note: Install the Spring of Pinch Arm Unit into the Hole of Pinch Charge Arm as shown in Fig.A10. Spring of the Pinch Arm Unit Stator Capstan Unit...
  • Page 123 (8) Install the Take-up Loading Arm Unit. Take-up Shaft Holder Unit NOTE: When install the replacement parts; apply the Floil Grease (VFK1298A). Take-up Loading Arm Unit Supply Shaft Holder Unit Fig.A12 (6) Install the Intermediate Gear, Torque Clutch and Cut Fig.A15 Washer in order.
  • Page 124 Phase Adjustment NOTE: When install the replacement parts; apply the Floil Grease (VFK1298A). Main Lever Take-up Loading Arm Gear Supply Loading Arm Gear a) Inside Fig.A18 (10) Set the Concave portion of Take-up Loading Arm Gear to the position shown in Fig.A19. b) Outside Fig.A20 Concave portion of Take-up Loading Arm Gear...
  • Page 125 (12) Push the Main Lever leftward to adjust the phase so that (14) Install the Change Gear Spring through the shaft for the hole of Main Lever is met with the hole of Chassis as Change Gear. shown in Fig.A16. Change Gear Spring Phase Adjustment Fig.A26...
  • Page 126 (17) Install the Main Cam Gear so that the Phase Adjustment (19) Install the Supply Brake Arm Unit. Hole of Main Cam Gear is met with the hole of Chassis, and install the Cut Washer. Supply Brake Arm Unit NOTE: When install the replacement parts;...
  • Page 127 (23) Confirm that the Idler Gears are installed onto the Idler Tension Arm Arm, and install the Idler Arm to Chassis. (Bottom View) Idler Gears Tension Arm Boss (Bottom View) Idler Arm Fig.A37 (24) Install the LED Prism and turn it counter-clockwise. LED Prism Fig.A35 (22) Install the Tension Spring to the Supply Brake Arm Unit.
  • Page 128 (26) Install the Take-up Brake Arm Unit, and then hook the INSTALLATION OF THE SLOT-IN UNIT Take-up Brake Spring to Chassis. (28) Confirm the phase of Sector Gear. Take-up Brake Arm Unit Take-up Brake Spring Fig.A40 Confirm that the Adjustment Holes Sector Gear...
  • Page 129 (34) Place the Mode Switch to EJECT position. Sharp edge of Wiper Arm R Fig.A49 (35) Install the Mechanism Chassis onto the Main C.B.A., and Sector Gear Hole tighten three Black Screws and three Red Screws with Fig.A46 earth lead, and connect two Flexible Card Connectors (Cylinder and A/C Head) and P1531.
  • Page 130 5-2. TAPE INTERCHANGEABILITY 5. MECHANICAL ADJUSTMENT ADJUSTMENT PROCEDURE Carry out the following procedures for Tape Interchangeability 5-1. P2 AND P3 POST ADJUSTMENT Adjustment to do it correctly and smoothly. (PREADJUSTMENT) (1) P2 AND P3 POST ADJUSTMENT Equipment required: (2) ADJUSTMENT OF P4 POST Post Adjustment Screwdriver (VFK0329) (3) HEIGHT ADJUSTMENT OF A/C HEAD (1) Remove the Top Plate.
  • Page 131 (5) If the envelope appears like “D” or “E” in Fig.M5, then adjustment of the tape guide post (P3: Exit) is necessary. (6) Adjust the tape guidepost (P3) in the same manner as the P2 post so that the exit portion becomes flat as shown in Fig.M8”F”.
  • Page 132 Aim for P2, P3 Posts Adjustment Post Name Adjustment Method Envelope Turn P2 Post counter-clockwise P2 Post (Approx. 1/2 revolutions) P2 Post Turn P2 Post clockwise (Approx. 1/4 revolitions) P3 Post Turn P3 Post clockwise (Approx. 1/2 revolutions) P3 Post Turn P3 Post counter-clockwise (Approx.
  • Page 133 5-2-(3). HEIGHT ADJUSTMENT OF A/C Turn screw (A) clockwise until the wrinkle disappears on HEAD the lower edge of tape at P4 Post. < When moving the A/C Head up > (4) Turn the screw (C) until the audio signal is maximized. Rotate the screw (A) counterclockwise until the wrinkle NOTE: appears on the lower edge of tape at P4 Post.
  • Page 134 5-2-(6). FINE-ADJUSTMENT OF X-VALUE Equipment Required: Fine Adjustment Gear Driver (VFK0330) (1) Connect the oscilloscope to the audio output and the video output. Both output signals should be fixed by the External trigger. (2) Playback the Alignment Tape and set the tracking control into center fix position.
  • Page 135 Servicing Fixture & Tools VFJ8125H3F VFK0132 VFK0335 PAL VHS Alignment Tape Back Tension Meter Retaining Ring Remover (Tentelometer, Made in U.S.A.) (3mm/4mm) VFM8080HQFP NTSC VHS Alignment Tape VFK0326 VFK0329 VFK0330 Hex. Wrench Set Post Adjustment Screwdriver Fine Adjustment Gear Driver (0.7,0.9,1.2,1.5,1.6,2.0,2.4,3.0mm) VFK27 VFK1024...
  • Page 136 6. SERVICE INFORMATION DISPLAY <FIP> Service Mode Number Indicates the circuit to be checked. Service Information Number Indicates which circuit senses a malfunction. Service Data Number Indicates the condition of the circuit and/or the position of the mechanism. Fig.D1 Service Information Display 6-1.
  • Page 137 Service Contents Contents of Indication Contents of Indication Remarks Number on minute on second Indication Mechanism position Ordering for the Motors There are next conditions in the inner data (Real time) (Real time) this mode for enable the of IC6001 mechanism operations without a cassette tape.
  • Page 138 7. SELF- DIAGNOSIS INDICATION DISPLAY This VTR has a self-diagnosis and display function. If the VTR detects trouble during installation or during use, one of the following Error Codes will automatically appear in the VTR display. Error Codes are displayed in the form of a single English letter followed by two numbers, as for example ”H01”.
  • Page 140 7-1. TABLE OF DETECTING CONDITION AND MOVEMENT OF MECHANISM IN DETECTING OF THE SELF-DIAGNOSIS FUNCTION Indica Condition of the Detection Movement of the Mechanism Remedy Automatic tion /Check Indication Dew formation “U10” is indicated on the FIP when the dew is detected. If the voltage at the dew detection input terminal is over 1.36VDC, it “10”...
  • Page 141 Indica Condition of the Detection Movement of the Mechanism Remedy Automatic tion /Check Indication The position signal can not be detected within the regulated time In the first detection after the mode shift is started, the detection result is Please check the for the shift to the aiming position except EJECT position during not judged an Error, and the Mechanism Initial Operation is performed.
  • Page 142 Indica Condition of the Detection Movement of the Mechanism Remedy Automatic tion /Check Indication The capstan FG is not output when Cassette is inserted. (There is “15” is memorized on the self- diagnosis history, when the Error is Please check the a possibility of the capstan system Error.) detected.
  • Page 143 Indica Condition of the Detection Movement of the Mechanism Remedy Automatic tion /Check Indication T-reel lock detection in constant running of the T-reel. “18” is memorized on the self- diagnosis history. Please check If the T-reel pulses could not be detected over the regulated time while The mechanism is shifted to LOAD position and tape rewinding is mechanism T-reel...
  • Page 144 7-2. MEMORY OF THE SELF-DIAGNOSIS HISTORY AND THE SUPPLEMENTARY DATA This is effective only in Service Mode 3, 4, 5. (1) Error Number and Supplementary Data (Sample) The Supplementary Data for each Error number are memorized. Memory No. Reason Supplementary Data (Error No.) Data 1 Data 2...
  • Page 145 * Explanation of “Tape position” of the Supplementary Data The Tape position Data is the area data of S-reel that is used for judgement of reducing speed in the Main microprocessor IC6001, and as the tape position is moved from the starting edge to the finishing edge, the value becomes smaller. The Tape Data does not become “0”...
  • Page 146 7-3. CHANGE OF MEMORY TIMING FOR ERROR NO. F03 & F04 The F03 means that the mechanism lock has been detected other than during unloading and/or cassette-up condition. The F04 means that the mechanism lock has been detected during unloading condition. There are many cases that initial operation is performed once after mechanism lock F03 or F04 has been detected and then the VCR returns to the normal condition.
  • Page 147 Self-Diagnosis history and Memory of the supplementary data Supplementary Data Memory Reason (Error No.) Data 1 Data 2 Data 3 Data 4 20/21/22/23 An error during PG Shifter VCR mode No Data Process No. No data Automatic Adjustment exceptional ejection VCR mode Reason Process No.
  • Page 148 A. Service number: 3 B. Memory number: 04(Mechanism lock during Unloading) C. Supplementary data 1(VCR Mode): 0(STOP) D. Supplementary data 2(Stand by position): 4(LOAD position) (Sample) E. Supplementary data 3(Process number): 12 F. Supplementary data 4(LM data): 02(Mechanism position has been changed) * Details of “VCR mode”...
  • Page 149 * Description of “OPM” (VCR mode) OPM (VCR mode) OPM (VCR mode) STOP 0x00 RSTILL 0x19 EJECT 0x01 SYPLAY 0x28 0x02 AIREC 0x2a 0x03 SYRECPS 0x2b 0x04 SYINSERTPS 0x2f 0x05 SHREW 0x42 SLOW 0x06 SHFF 0x43 POWEROFF 0x07 SHPLAY 0x48 PLAY 0x08 REMSTOP...
  • Page 150 10. SYSTEM CONTROL CIRCUIT MECH. CONTROL MATRIX SYSTEM TIMER IC CONTROL SAFETY DEVICE DISPLAY OTHERS 10-1. MODE TRANSITION The relation between the present mode and operation key is shown in the following table. 10-1-1. Basic mode action (without EDIT function) Present Operation Key mode...
  • Page 151 10-2. BASIC ACTION IN MECHANISM 10-2-1. Position SW and main action at each position There are 7 kinds of absolute position and undefined sections between each position in R4 mechanism. They are regulated as follows, according to the input from position switch. Cassette Out >>>>>...
  • Page 152 10.3. SUPPLY AND TAKE-UP SENSORS Supply and Take-up phototransistors are used to sense the beginning and end of tape. The tapes has transparent leaders enter the tape transport path, they allow infrared light from the sensor LED to reach either one of the tape end sensors (phototransistor).
  • Page 153 10-5. DEW SENSOR If excessive moisture or condensation is present inside the machine (an internal humidity of more than 98%) the unit will stop if running. Until the moisture level decreases only the Eject mode will operate. To sense the humidity, a dew sensor is used. The sensor is a special variable resistor, which change resistance ambient humidity.
  • Page 154 10-6-3. Detecting reel lock During tape running such as PLAY, CUE/REV or FF/REW, if reducing tape speed or reel mount stop is detected, these are recognized as reel lock. In this case, in order to protect tape and capstan driver, switch the VCR mode to STOP, or switch the tape running drive to capstan drive from reel drive.
  • Page 155 10-6-4. Detecting cylinder lock When cylinder Error in starting or lock in modes that cylinder rotates, such as PLAY, CUE/REV or FF/REW is detected, following actions are performed to protect tape. Cylinder condition Lock detection Starting When the rotation has not reached the fixed rotation speed within 5 sec. after stop condition, starting error is detected and the unload starts up to DOWN position keeping VCR mode.
  • Page 156 11. MOTOR DRIVE SECTION The motor drive (Capstan, Cylinder & Loading motor) IC becomes all new. Both of the cylinder motor drive circuit and the loading motor drive circuit are included in IC2501. 11-1.CAPSTAN DRIVE CIRCUIT There are two major different points between Z-Mechanism and R4-Mechanism described as follows: Z-Mechanism R4-Mechanism 1.
  • Page 157 2.R4 Mechanism employs PWM (Pulse Width Motor) as Capatan Motor Drive Signal in REC or PLAYBACK mode To improve power consumption value, R4-Mechanism uses PWM signal as Capstan Motor drive signal instead of Linear driving signal which is used in Z-Mechanism. CAPSTAN MOTOR DRIVING SIGNAL Z-Mechanism (Linear drive signal) R4-Mechanism (PWM drive signal)
  • Page 158 PWM Input [ In the positive period] PWM Input Wave form at Q2-b (Motor Power) The motor current in positive period of PWM drive is flows as follows. L × 2 VM1→ Q2→ L→ Q3→ R PWM Input [In the negative period] PWM Input Wave form at Q2-b...
  • Page 159 11-2.CYLINDER DRIVE AND LOADING MOTOR DRIVE CIRCUIT The Cylinder and Loading Motor IC is combined one piece of IC named IC2501. The simplified block diagram and I/O chart for IC2501 are shown below. IC2501 (BD6656FP-E2) I/O CHART PIN NO. TERMINAL NAME DESCRIPTION Power of the loading section.

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