SERVICE MANUAL
DA
TA
BASIC VIDEO MECHANISM
: D35(N)DI-4HF/PAL(6721RF0750B) <7850/5900>
: D35(N)DI-4HD/PAL(6721RF0730B) <4600>
: D35(N)DI-2HD/PAL(6721RF0700B) <1200>
STEREO VIDEO CASSETTE RECORDER <7850/5900>
VIDEO CASSETTE RECORDER <4600/1200>
HV-FX7850
HV-FX5900
HV-FX4600
HV-GX1200
S/M Code No. 09-027-358-9N3
KH
KH
KH
KH
HV-FX7850
HV-FX5900, FX4600, GX1200
-2-
TABLE OF CONTENTS -1/1
SPECIFICATIONS .................................................................... 3
ACCESSORIES PARTS LIST.................................................... 4
DISASSEMBLY INSTRUCTIONS..............................................5
SERVICE POSITION ................................................................ 6
VCR TEST TAPE INTERCHANGEABILITY TABLE ................ 7
ELECTRICAL PARTS LIST............................................... 8 ~ 16
TRANSISTOR ILLUSTRATION............................................... 17
WIRE HARNESS DIAGRAM .................................................. 18
BLOCK DIAGRAM ......................................................... 19 ~ 26
SCHEMATIC DIAGRAM
1. POWER ............................................................................... 27
2. AUDIO/VIDEO <7850/5900> ............................................... 28
3. AUDIO/VIDEO <4600/1200> ............................................... 29
4. Hi-Fi AUDIO/SCART<7850/5900>....................................... 30
5. SCART <4600> ................................................................... 31
6. SCART <1200> ................................................................... 32
7. TUNER ................................................................................ 33
8. SYSTEM CONTROL/SERVO ............................................. 34
9. KEY 1, KEY 2 ...................................................................... 35
WIRING
1. MAIN C.B <7850> ............................................................... 36
2. MAIN C.B <5900> ............................................................... 37
3. MAIN C.B <4600> ............................................................... 38
4. MAIN C.B <1200> ............................................................... 39
5. KEY 1................................................................................... 40
5. KEY 2 ...................................................................................41
IC BLOCK DIAGRAM ........................................................ 42,43
VOLTAGE CHART ............................................................. 44,45
WAVEFORM
AUDIO/VIDEO SECTION ........................................................ 46
SYSTEM CONTROL/SERVO/OSD SECTION ........................47
LED DISPLAY ......................................................................... 48
IC DESCRIPTION ........................................................... 49 ~ 52
ADJUSTMENT.................................................................... 53,54
ELECTRICAL TROUBLESHOOTING .............................55 ~ 71
MECHANICAL EXPLODED VIEW ........................................ 72
MECHANISM EXPLODED VIEW .................................. 73 ~ 75
MECHANICAL,VIDEO MECHANISM PARTS LIST .......... 76,77
COLOR NAME TABLE .......................................................... 78
VIDEO MECHANISM PARTS LOCATIONS
Top View ................................................................................. 79
Bottom View ............................................................................ 79
VIDEO MECHANISM DISASSEMBLY
1. Drum Assembly ................................................................... 80
2. Plate Top ..............................................................................82
3. Holder Assembly CST ......................................................... 82
4. Opener Door ........................................................................82
5. Bracket Assembly L/D Motor .............................................. 82
6. Gear Assembly Rack F/L ..................................................... 82
7. Arm Assembly F/L ................................................................82
8. Lever Assembly S/W .......................................................... 82
9. Arm Assembly Cleaner ........................................................ 83
10. Head F/E ........................................................................... 83
11. Base Assembly A/C Head ..................................................83
12. Brake Assembly T ..............................................................84
13. Brake Assembly RS ...........................................................84
14. Arm Assembly Tension ...................................................... 84
15. Reel S/Reel T .................................................................... 84
16. Base Assembly P4 .............................................................85
17. Opener Lid .........................................................................85
18. Arm Assembly Pinch ..........................................................85
19. Lever T/up ......................................................................... 85
20. Belt Capstan/Motor Capstan ............................................. 86
21. Lever F/R ...........................................................................86
22. Clutch Assembly D35 ........................................................ 86
23. Brake Assembly Capstan .................................................. 86
24. Gear Drive/Gear Cam ........................................................87
25. Gear Sector ....................................................................... 87
26. Plate Slider ........................................................................ 87
27. Lever Tension .................................................................... 87
28. Lever Spring ...................................................................... 87
29. Gear Assembly P2/Gear Assembly P3 .............................. 88
30. Base Assembly P2/Base Assembly P3 ............................. 88
31. Base Loading .................................................................... 89
32. Base Tension ..................................................................... 89
33. Arm Assembly Idler Jog ..................................................... 89
VIDEO MECHANISM ADJUSTMENT
Tools and Fixtures for Service ................................................. 90
1. Mechanism Alignment Position Check ................................ 91
2. Preparation for Adjustment .................................................. 92
3. Checking Torque ..................................................................92
4. Guide Roller Height Adjustment .......................................... 93
4-1. Preliminary Adjustment ...................................................93
4-2. Precise Adjustment .........................................................93
5. Audio/Control (A/C) Head Adjustment ................................. 94
5-1. Preliminary Adjustment ...................................................94
5-2. Confirm that the Tape Passes smoothly between
the Take-up Guide and Pinch Roller ............................... 95
5-3. Precise Adjustment (Azimuth Adjustment) ..................... 95
6. X-Value Adjustment ............................................................. 95
7. Adjustment after Replacing Drum Assembly
(Video Heads) ..................................................................... 96
8. Check the Tape Travel after Reassembling
Deck Assembly..................................................................... 96
8-1. Checking Audio and RF Locking Time
during Playback and after CUE or REV ......................... 96
8-2. Check for Tape Curling or Jamming ............................... 96
MAINTENANCE/INSPECTION PROCEDURE
1. Check before starting Repairs ............................................. 97
2. Required Maintenance ........................................................ 98
3. Scheduled Maintenance ...................................................... 98
4. Supplies Required for Inspection and Maintenance ............ 98
5. Maintenance Procedure ...................................................... 98
5-1. Cleaning ......................................................................... 98
5-2. Greasing ......................................................................... 99
VIDEO MECHANISM TROUBLESHOOTING GUIDE
1. Deck Mechanism .....................................................101 ~ 103
2. Front Loading Mechanism .......................................... 104,105
OTHER PARTS LIST............................................................. 106
-3-
SPECIFICATIONS -1/1
· Design and specifications are subject to change without notice.
<HV-FX7800, FX5900>
Video recording system
Rotary 2 head helical scanning system
Video head
Double azimuth 4 heads
Tuner system
Frequency synthesized tuner
TV system
B/G, D/K, I/I PAL, B/G, D/K SECAM
Video signal system
PAL/MESECAM color signal,
625 lines, 50 fields
Usable cssettes
VHS video cassettes
Recording/playback time
PAL/MESECAM
SP: 5 hours max. with E-300 tape.
LP: 10 hours max. with E-300 tape
NTSC (Playback only)
SP: 3 hours 30 minutes max.
with T-210 tape
LP: 7 hours max.
with T-210 tape
EP: 10 hours 30 minutes max.
with T-210 tape
Tape speed
PAL/MESECAM
SP: 23.39 mm/s
LP: 11.69 mm/s
NTSC (Playback only)
SP: 33.35 mm/s
LP: 16.67 mm/s
EP: 11.12 mm/s
Rewind time:
Approx. 3 min. with E-180 tspe
Channel coverage
VHF: E02 to E12
UHF: E21 to E69
CATV: S01 to S41
Video input
0.5 - 2.0 Vp-p, 75 ohm, unbalanced
Video output
1.0 Vp-p, 75 ohm, unbalanced
Horizontal resolution
240 lines (SP)
Video S/N
43 dB (SP)
Audio track
3 tracks (Hi-Fi sound 2 tracks, Normal
sound 1 track)
Audio input
SCART: -6 dBm, more than 10 k ohm
RCA :-6 dBm, more than 47 k ohm
<FX7850>
Audio output
SCART: -6 dBm, less than 1 k ohm
RCA: -6 dBm, less than 1 k ohm
Hi-Fi frequency response
20 Hz - 20 kHz
Hi-Fi dynamic range
More than 87 dB (SP)
Hi-Fi Wow & Flutter
Less than 0.01%(nominal)
Operating temperature:
5 °C to 35 °C
Power requirements
200 - 240 V AC, 50 Hz
Power consumption
12 watts
TYP 2.5 watts (power save mode.)
Dimensions
360 (W) x 270 (D) x 94.5 (H) mm
(141/
4 x 10
3/
4 x 3
3/
4 in.)
Weight
Approx. 3.2 kg (7.04 lbs.)
<HV-FX4600, GX1200>
Video recording system
Rotary 2 head helical scanning system
Video head
Double azimuth 4 heads <FX4600>
2 heads <GX1200>
Tuner system
Frequency synthesized tuner
TV system
B/G, D/K, I/I PAL, B/G, D/K SECAM
Video signal system
PAL/MESECAM color signal,
625 lines, 50 fields
Usable cssettes
VHS video cassettes
Recording/playback time
PAL/MESECAM
SP: 5 hours max. with E-300 tape.
LP: 10 hours max. with E-300 tape
NTSC (Playback only)
SP: 3 hours 30 minutes max.
with T-210 tape
LP: 7 hours max.
with T-210 tape
EP: 10 hours 30 minutes max.
with T-210 tape
Tape speed
PAL/MESECAM
SP: 23.39 mm/s
LP: 11.69 mm/s
NTSC (Playback only)
SP: 33.35 mm/s
LP: 16.67 mm/s
EP: 11.12 mm/s
Rewind time:
Approx. 3 min. with E-180 tspe
Channel coverage
VHF: E02 to E12
UHF: E21 to E69
CATV: S01 to S41
Video input
0.5 - 2.0 Vp-p, 75 ohm, unbalanced
Video output
1.0 Vp-p, 75 ohm, unbalanced
Horizontal resolution
240 lines (SP)
Video S/N
43 dB (SP)
Audio track
1 track (Normal sound)
Audio input
-6 dBm, more than 10 k ohm
Audio output
-6 dBm, less than 1 k ohm
Operating temperature:
5 °C to 35 °C
Power requirements
200 - 240 V AC, 50 Hz
Power consumption
12 watts
TYP 2.5 watts (power save mode.)
Dimensions
360 (W) x 270 (D) x 94.5 (H) mm
(141/
4 x 10
3/
4 x 3
3/
4 in.)
Weight
Approx. 3.2 kg (7.04 lbs.)
!
= ! SAFTY PARTS
C
= Components marked
All components used on this model at the production line are shown in this service manual.
However, please note that not all components will be available as spare parts for after-sales service.
Components marked S and O are designated as spare parts for service and will be stocked at the spare parts centers.
Components marked X and R are not designated as spare parts for after sales service, and will not be stocked at the spare parts centers.
UNIT-NAME
! C REF-NO PARTS-NO
PARTS-NAME
SUFFIX&MODEL
-4-
ACCESSORIES PARTS LIST -1/1
HV-FX7850
HV-FX5900
HV-FX4600
HV-GX1200
KHF
KHF
KHF
KHF
O AS1001
S8-35R-P00-72E INSTRUCTION ASSEMBLY EC291P/E
a
.
.
.
O AS1001
S8-35R-P00-77R INSTRUCTION ASSEMBLY ECA901NY
.
b
.
.
O AS1001
S8-35R-P00-77Q INSTRUCTION ASSEMBLY ECA409Y
.
.
c
.
O AS1001
S8-35R-P00-77D INSTRUCTION ASSEMBLY ECA200Y
.
.
.
d
O AS1002
S7-11R-1P0-33D REMOTE CONTROLLER ASSEMBLY(CF
a
.
c
.
O AS1002
S7-11R-1P0-33J REMOTE CONTROLLER ASSEMBLY(CF
.
b
.
.
O AS1002
S7-11R-1P0-33S REMOTE CONTROLLER ASSEMBLY N5
.
.
.
d
O AS1003
S8-50R-CAA-260 CABLE,COAXIAL 1200M/M
a
b
c
d
O AS1005
S8-51R-P00-03F CABLE ASSY,RF/SCART/RCA USI
a
b
.
.
O AS1005
S8-51R-P00-03A CABLE ASSY,RF/SCART/RCA USI
.
.
c
d
O AS1006
S6-11R-2G0-01A PLUG ASSY 2WAY RED/WHITE
a
b
.
.
-5-
DISASSEMBLY INSTRUCTIONS -1/1
1. Top Case Removal
1) Remove 4 screws holding the top case.
2. Panel Front Removal (see Fig. 1)
1) Release 7 tabs, and then remove the panel front.
Fig. 1
3. Key1 C.B. and Key2 C.B. Removal (see Fig. 2)
1) Release 2 tabs, and then remove Key1 C.B. from the connec-
tor (PKM01) in the direction of arrow 1 .
2) Release the tab, and then remove Key2 C.B. from the connec-
tor (PKM02) in the direction of arrow 2 .
Fig. 2
4. Mechanism Removal (see Fig. 3)
1) Disconnect the ACE head FF cable from the connector (P3D02)
on the Main C.B.
2) Remove 6 screws A .
Fig. 3
5. Main C.B. Removal (see Fig. 4)
1) Remove 2 screws B holding the panel assy, distri-butor.
2) Release 5 tabs, and then simultaneously lift the panel assem-
bly, distributor and Main C.B. to remove them.
Fig. 4
PANEL
FRONT
TAB
TAB
TAB
TAB
KEY2 C.B
KEY1 C.B
MAIN C.B
PKM01
PKM02
1
2
FF CABLE
P3D02
A
A
A
PANEL
DISTRIBUTOR
MAIN C.B
TAB
TAB
TAB
TAB
TAB
B