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HV-FX8200 K

HV-FX7700 K

HV-FX710 K

HV-GX955 K

HV-GX935 K

HV-FX8200 HV-GX930 K

HV-FX7700, FX710 HV-GX955, GX935, GX930

SERVICE MANUAL
STEREO VIDEO CASSETTE RECORDER
<8200/7700/710>
BASIC VIDEO MECHANISM
:D33K-4HF/PAL-HREW(6721R-0251A)<8200>
VIDEO CASSETTE RECORDER :D33K-4HF/PAL(6721R-0250A)<7700/710>
<955/935/930> :D33K-2HD/NP-VCR(6721R-0205A)<955/935/930>

This Service Manual is the "Revision Publishing" and replaces "Simple Manual"
(S/M Code No. 09-007-347-2T4).
ON
V ISI
RE

TA
DA

S/M Code No. 09-007-347-2R4
TABLE OF CONTENTS
SPECIFICATIONS ............................................................ 3 9. Head F/E ................................................................... 70
ACCESSORIES LIST ....................................................... 3 10. Base Assembly A/C Head ........................................ 70
DISASSEMBLY INSTRUCTIONS ..................................... 4 11. Brake Assembly S .................................................... 71
SERVICE POSITION ........................................................ 5 12. Brake Assembly T .................................................... 71
VCR TEST TAPE INTERCHANGEABILITY TABLE ........ 6 13. Arm Assembly Tension ............................................. 71
ELECTRICAL MAIN PARTS LIST .............................. 7 ~ 9 14. Reel S & Reel T ....................................................... 71
TRANSISTOR ILLUSTRATION ........................................ 9 15. Support CST ............................................................ 72
WIRE HARNESS DIAGRAM .......................................... 10 16. Base Assembly P4 ................................................... 72
BLOCK DIAGRAM ................................................. 11 ~ 22 17. Opener Lid ............................................................... 72
SCHEMATIC DIAGRAM 18. Arm Assembly T/up .................................................. 72
1. POWER/TUNER/NICAM <8200/7700/710> ...... 23 ~ 24 19. Arm Assembly Pinch ................................................ 72
2. POWER/TUNER <955/935/930> ....................... 25 ~ 26 20. Belt Capstan/Motor Capstan .................................... 73
3. AUDIO/VIDEO SECTION ................................... 29 ~ 30 21.Clutch Assembly D33-K ............................................ 73
4. Hi-Fi AUDIO/SCART <8200/7700/710> ............. 31 ~ 32 22. Lever F/R ................................................................. 73
5. SCART <955/935/930> ...................................... 33 ~ 34 23. Gear Assembly H-Up/D-K or
6. SYSTEM CONTROL/SERVO Gear Assembly Up/D-K ............................................ 73
<8200/7700/710> ............................................... 35 ~ 36 24. Bracket Assembly Jog .............................................. 74
7. SYSTEM CONTROL/SERVO <955/935/930> ... 39 ~ 40 25. Guide Rack F/L, Gear Rack F/L ............................... 74
8. KEY1 <8200/7700/710> ............................................. 47 26. Brake Assembly Capstan ......................................... 74
9. KEY1 <955/935/930> ................................................. 47 27. Gear Drive/Gear Cam/Gear Connector ................... 75
10. KEY2 <8200/7700/710> ........................................... 48 28. Bracket Assembly L/D motor .................................... 75
11. KEY2 <955/935/930> ............................................... 48 29. Gear Sector .............................................................. 76
WAVEFORM 30. Base Tension/Plate Slider/Lever Tension ................. 76
AUDIO/VIDEO SECTION ............................................... 28 31. Gear Assembly P3/Gear Assembly P2 .................... 77
SYSTEM CONTROL/SERVO SECTION ....................... 38 32. Base Assembly P3/Base Assembly P2 .................... 77
VOLTAGE CHART 33. Arm Assembly Idler or Arm assembly Idler Jog ........ 77
1. POWER SECTION ..................................................... 25 DECK MECHANISM ADJUSTMENT
2. AUDIO/VIDEO SECTION ........................................... 27 Tools and Fixtures for service ......................................... 78
3. Hi-Fi AUDIO/SCART SECTION ................................. 33 1. Mechanism Alignment Position Check ....................... 79
4. SYSTEM CONTROL/SERVO SECTION ................... 37 2. Preparation for Adjustment ........................................ 80
FL DISPLAY ............................................................ 41 ~ 42 3. Checking Torque ........................................................ 80
WIRING 4. Guide Roller Height Adjustment ................................. 81
1. MAIN C.B <8200/7700/710> .............................. 43 ~ 44 4-1. Preliminary Adjustment .......................................... 81
2. MAIN C.B <955/935/930> .................................. 45 ~ 46 4-2. Precise Adjustment ................................................ 81
3. KEY1 C.B <8200> ...................................................... 49 5. Audio/Control (A/C) Head Adjustment ........................ 82
4. KEY2 C.B <8200> ...................................................... 49 5-1. Preliminary Adjustment .......................................... 82
5. KEY1 C.B <7700/710> ............................................... 49 5-2. Confirm that the Tape Path smoothly between
6. KEY2 C.B <7700/710> ............................................... 49 the Take-up Guide and Pinch Roller ..................... 83
7. KEY1 C.B <955/935/930> .......................................... 50 5-3. Precise Adjustment (Azimuth Adjustment) ............. 83
8. KEY2 C.B <955/935/930> .......................................... 50 6. X-Value Adjustment .................................................... 83
9. NICAM C.B ................................................................. 51 7. Adjustment after Replacing Drum Assembly
ADJUSTMENT ........................................................ 52 ~ 53 (Video Heads) ............................................................. 84
IC DESCRIPTION ................................................... 54 ~ 57 8. Check the Tape Travel after Reassembling
MECHANICAL EXPLODED VIEW 1/1 ........................... 58 Deck Assembly ............................................................ 84
MECHANICAL MAIN PARTS LIST 1/1 ......................... 59 8-1. Checking Audio and RF Locking Time
MECHANISM EXPLODED VIEW 1/3~3/3 .............. 60 ~ 64 during Playback and after CUE or REV ................ 84
MECHANISM MAIN PARTS LIST 1/3~3/3 ............. 61 ~ 65 8-2. Check for Tape Curling or Jamming ....................... 84
DECK MECHANISM PARTS LOCATIONS MAINTENANCE/INSPECTION PROCEDURE
Top View .......................................................................... 66 1. Check before starting Repairs ................................... 85
Bottom View .................................................................... 66 2. Required Maintenance ............................................... 86
DECK MECHANISM DISASSEMBLY 3. Scheduled Maintenance ............................................ 86
1. Drum Assembly ......................................................... 67 4. Supplies Required for Inspection and Maintenance .. 86
2. Plate Assembly Top ................................................... 69 5. Maintenance Procedure ............................................. 86
3. Holder Assembly CST ............................................... 69 5-1. Cleaning ................................................................. 86
4. Guide CST ................................................................ 69 5-2. Greasing ................................................................ 87
5. Bracket Side (L)/Bracket Assembly Door .................. 69 MECHANISM TROUBLESHOOTING GUIDE
6. Arm Assembly F/L ..................................................... 69 1. Deck Mechanism ............................................... 88 ~ 90
7. Lever Assembly S/W ................................................. 69 2. Front Loading Mechanism ................................. 91 ~ 92
8. Arm Assembly Cleaner .............................................. 70

2
SPECIFICATIONS

Video recording system Rotary 2 head helical scanning system Video recording system Rotary 2 head helical scanning system
Video head Double azimuth 4 heads Video head 2 heads
Tuner system Frequency synthesized tuner Tuner system Frequency synthesized tuner
TV system I TV system I
Video signal system PAL color signal, 625 lines, 50 fields Video signal system PAL color signal, 625 lines, 50 fields
Usable cssettes VHS video cassettes Usable cssettes VHS video cassettes
Recording/playback time PAL Recording/playback time PAL
SP: 5 hours max. with E-300 tape. SP: 5 hours max. with E-300 tape.
LP: 10 hours max. with E-300 tape LP: 10 hours max. with E-300 tape
NTSC (Playback only) NTSC (Playback only)
SP: 3 hours 30 minutes max. SP: 3 hours 30 minutes max.
with T-210 tape with T-210 tape
LP: 7 hours max. with T-210 tape LP: 7 hours max. with T-210 tape
EP: 10 hours 30 minutes max. EP: 10 hours 30 minutes max.
with T-210 tape with T-210 tape
Tape speed PAL Tape speed PAL
SP: 23.39 mm/s SP: 23.39 mm/s
LP: 11.69 mm/s LP: 11.69 mm/s
NTSC (Playback only) NTSC (Playback only)
SP: 33.35 mm/s SP: 33.35 mm/s
LP: 16.67 mm/s LP: 16.67 mm/s
EP: 11.12 mm/s EP: 11.12 mm/s
Hight speed rewind time: Approx. 1 min. with E-180 tape Rewind time: Approx. 3 min. with E-180 tape
Channel coverage UHF: C21 to C69
Rewind time: Approx. 3 min. with E-180 tape RF output UHF channel between 22 and 68. 70 dB
Video input 0.5 - 2.0 Vp-p, 75 ohm, unbalanced
Channel coverage VHF: C02 to C12 Video output 1.0 Vp-p, 75 ohm, unbalanced
UHF: C21 to C69 Horizontal resolution 240 lines (SP)
RF output UHF channel between 22 and 68. 70 dB Video S/N 43 dB (SP)
Video input 0.5 - 2.0 Vp-p, 75 ohm, unbalanced Audio track 1 track (Normal sound)
Video output 1.0 Vp-p, 75 ohm, unbalanced Audio input SCART: -6 dBm, more than 10 k ohm
Horizontal resolution 240 lines (SP) Audio output SCART: -6 dBm, less than 1 k ohm
Video S/N 43 dB (SP) Operating temperature: 5