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SERVICE MANUAL
No.82923
June 2002
VIDEO CASSETTE RECORDER
SPECIFICATIONS (The specifications shown pertain specifically to the model HR-S7950EU.)
This service manual is printed on 100% recycled paper.
COPYRIGHT © 2002 VICTOR COMPANY OF JAPAN, LTD
HR-S6950EU, HR-S6955MS,
HR-S7950EU, HR-S7955EK, HR-S7955MS
V15S1/S2/S15
GENERAL
Power requirement : AC 220 V ­ 240 Vd, 50 Hz/60 Hz
Power consumption
Power on
: 18 W
Power off
: 3.6 W
Temperature
Operating
: 5
°C to 40°C
Storage
: ­20
°C to 60°C
Operating position : Horizontal only
Dimensions (WxHxD)
: 400 mm x 94 mm x 270 mm
Weight
: 3.4 kg
Format
: S-VHS/VHS PAL standard
Maximum recording time
(SP)
: 240 min. with E-240 video cassette
(LP)
: 480 min. with E-240 video cassette
(EP)
: 720 min. with E-240 video cassette
VIDEO/AUDIO
Signal system
: PAL-type colour signal and CCIR
monochrome signal, 625 lines
50 fields
Recording system : DA4 (Double Azimuth) head helical
scan system
Signal-to-noise ratio: 45 dB
Horizontal resolution
(SP/LP)
: 250 lines (VHS)
400 lines (S-VHS)
(EP)
: 220 lines (VHS)
350 lines (S-VHS)
Frequency range
: 70 Hz to 10,000 Hz (Normal audio)
20 Hz to 20,000 Hz (Hi-Fi audio)
Input/Output
: 21-pin SCART connectors:
IN/OUT x 1, IN/DECODER x 1
RCA connectors:
VIDEO IN x 1, AUDIO IN x 1,
AUDIO OUT x 1
S-Video connector:
IN x 1, OUT x 1
TUNER/TIMER
TV channel storage capacity
: 99 positions (+AUX position)
Tuning system
: Frequency synthesized tuner
Channel coverage : VHF 47 MHz ­ 89 MHz/
104 MHz ­ 300 MHz/
302 MHz ­ 470 MHz
UHF 470 MHz ­ 862 MHz
Aerial output
: UHF channels 22 ­ 69 (Adjustable)
Memory backup time
: Approx. 10 min.
ACCESSORIES
Provided accessories
: RF cable,
Infrared remote control unit,
"R6" battery x 2
Specifications shown are for SP mode unless otherwise
specified.
E.& O.E. Design and specifications subject to change without
notice.


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5-1
SECTION 5
PARTS LIST
SAFETY PRECAUTION
Parts identified by the
symbol are critical for safety. Replace only with specified part numbers.
5.1
PACKING AND ACCESSORY ASSEMBLY <M1>
The instruction manual to be provided with this product will differ according to the destination.
******************************
PACKING AND ACCESSORY ASSEMBLY <M1>
301
LP30855-004A
PACKING CASE
302
LP30909-001C
CUSHION ASSY
303
PQM30021-93
POLY BAG
306
LP20878-016A
REMOTE CONTROLLER
306A
LP40610-003A
COVER(BATTERY)
307
­
BATTERY,X2("R6"TYPE)
308
QPC02202230P
POLY BAG
! 310
LPT0650-001B
INST.BOOK(EN),A
!
LPT0650-002B
INST.BOOK(GE),A
!
LPT0650-003A
INST.BOOK(FR),A
!
LPT0650-004A
INST.BOOK(DU),A
!
LPT0650-005A
INST.BOOK(SP),A
!
LPT0650-006A
INST.BOOK(IT),A
!
LPT0650-007A
INST.BOOK(DA),A
!
LPT0650-008A
INST.BOOK(FI),A
!
LPT0650-009A
INST.BOOK(SW),A
!
LPT0650-010A
INST.BOOK(NO),A
!
LPT0650-011A
INST.BOOK(PT),A
!
LPT0650-012A
INST.BOOK(GR),A
!
LPT0650-013A
INST.BOOK(CZ),A
!
LPT0650-014A
INST.BOOK(PO),A
---------------
-----------------------
---------------------------------------------------- -
------------- ---
-----------------------
----------------------------------------------------- -
#
REF No. PART No.
PART NAME, DESCRIPTION
#
REF No.
PART No.
PART NAME, DESCRIPTION
!
LPT0650-015A
INST.BOOK(HU),A
!
LPT0650-016A
INST.BOOK(RU),A
!
LPT0651-001A
INST.BOOK(EN),C
!
LPT0651-002A
INST.BOOK(GE),C
!
LPT0651-003A
INST.BOOK(FR),C
!
LPT0651-004A
INST.BOOK(DU),C
!
LPT0651-005A
INST.BOOK(SP),C
!
LPT0651-006A
INST.BOOK(IT),C
!
LPT0651-007A
INST.BOOK(DA),C
!
LPT0651-008A
INST.BOOK(FI),C
!
LPT0651-009A
INST.BOOK(SW),C
!
LPT0651-010A
INST.BOOK(NO),C
!
LPT0651-011A
INST.BOOK(PT),C
!
LPT0651-012A
INST.BOOK(GR),C
!
LPT0651-013A
INST.BOOK(CZ),C
!
LPT0651-014A
INST.BOOK(PO),C
!
LPT0651-015A
INST.BOOK(HU),C
!
LPT0655-001A
INST.BOOK(EN),D
!
LPT0658-001A
INST.BOOK(FR),B
!
LPT0659-001B
INST.BOOK(FR),E
311
QPC02503530P
POLY BAG
312
PEAC0300-02
RF CABLE
313
QAL0095-005
LED CABLE ASSY,D
315
QAM0238-003
PERI CABLE,B,E
316
BT-54013-2
WARRANTY CARD,A,C
317
BT-54008-2
GUARANTY CARD,B,D,E
319
LYT0194-001B
Q.CARD(JUK),D
301
302
302
SPEC OF BARCODE
FINAL ASSY <M2>
ADHESIVE TAPE
307
312
308
306
306A
303
310
311
315 (HR-S6955MS/S7955MS)
SPEC OF BARCODE
316
(HR-S6950EU/S7950EU)
(HR-S7955EK)
(HR-S6955MS/S7955MS)
319
311
317
SPEC OF BARCODE
310
311
317
SPEC OF BARCODE
310
313
(HR-S7955EK)
MODEL
MARK
HR-S6950EU
A
HR-S6955MS
B
HR-S7950EU
C
HR-S7955EK
D
HR-S7955MS
E


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5-2
5.2
FINAL ASSEMBLY <M2>
BEWARE OF BOGUS PARTS
Parts that do not meet specifications may cause trouble in regard to safety
and performance. We recommend that genuine JVC parts be used.
A
CN1601
The excessive length portion
of wire should be reat as figure.
DRUM
A/C HEAD
CN916
CN2001
Make a crease
CN511
Make a crease
FRONT PANEL
CN7001
B
Make a crease
P/S CONV PWB
Make a crease
DETAIL "A"
About 5cm
CN7001
Push the FFC wire from the FRONT PANEL to rear side.
CN7002
CN7005
DETAIL "B"
CN5001
To Front S Jack board assembly
To Adv. Jog board assembly
d
a
Q3
00
3
b
Q3
00
2
JS
30
01
c'
D3
00
1
b
CN5001
d'
b
c'
"Z"
h
f
k
e
a
f
c
c
b
f
f
c'
c'
d'
h
b
b
e
MINI FORNT BOARD
ASSY<28>[HR-S7955MS]
544
544
S/P CONVERTER
BOARD ASSY<87>
h
k
2D DIGITAL BOARD ASSY<05>[HR-S6950EU/S6955MS/S7955MS]
3D D/2M BOARD ASSY<05>[HR-S7950EU/S7955EK]
TERMINAL BOARD ASSY<06>
DEMOD BOARD
ASSY<14>
h
right side
right side
back side
back side
JS3001
Accord the position of V gap on R. Encoder and PWB silk " ".
<Phase alignment>
Accord the position of Boss on R. Encoder and PWB silk " ".
For the prevention of the DRUM FPC damage.
When you attach the Mechanism assembly on Bottom chassis.
Attach the Mechanism assembly after the positioning boss "z" of the
Bottom chassis is matched to the positioning hole of the Mehcanism assembly.
532
MAIN BOARD
ASSY<03>
533
533
533
517
Insert the bushing of POWER CORD
so as not to twist the cord.
a
d
d
g
e
520
522
521
MECHANISM ASSY<M4>
505
510
510
510
515
516
516
525
519A
519
g
NOTE) AFTER ATTACHED ROLLER ARM ASS'Y,
TIGHTEN SCREW WITH SLIT WASHER.
501A
501
529
534
501B
[HR-S7955MS]
543
NOTE)INSERT FFC WIRE TO THE CONNECTOR
BEFORE ATTACHING JOG/SW PWB TO F.PANEL.
NOTE) INSERT FFC WIRE TO THE CONNECTOR BEFORE
CN7003
ATTACHING JOG/SW PWB TO F.PANEL.
CN7108
Front panel assembly back side
Back side
NOTE) WHEN YOU FIX FRONT S Jack PWB WITH THE SCREW.
PUT JIG UNDER FRONT PANEL ASS'Y.
Right side
Back side
OK
NG
CN
electrode side
supporting side
Except U/U(C)/JPN
NOTE
CN
CN
1. Insert direction of FFC WIRE as follows.
2. FFC WIRE and DRUM FPC WIRE should
be insert as follows.
3. Insert direction of POWER CORD.
NEUTRAL
WHITE LINE
CN5001
BLUE
NEUTRAL
CN5001
U/U(C)/JPN
90
°
REAR SIDE
504
502
511
503
503
S JACK BOARD ASSY<36>
530
WR4
WR5
531
ADV. JOG BOARD
ASSY<38>
WR4
WR9
[HR-S6955MS/S7955MS]
[HR-S6955MS/S7955MS]
WR10
[HR-S7955MS]
WR5
f
f
f
f
512


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5-3
---------------
-----------------------
---------------------------------------------------- -
------------- ---
-----------------------
----------------------------------------------------- -
#
REF No. PART No.
PART NAME, DESCRIPTION
#
REF No. PART No.
PART NAME, DESCRIPTION
******************************
FINAL ASSEMBLY <M2>
! 501
LP10427-014F
FRONT PANEL ASSY,A
!
LP10427-016F
FRONT PANEL ASSY,B
!
LP10427-017F
FRONT PANEL ASSY,C
!
LP10427-018F
FRONT PANEL ASSY,D
!
LP10427-019F
FRONT PANEL ASSY,E
501A
LP20961-007C
CASSETTE DOOR,A,B,E
LP20961-010C
CASSETTE DOOR,C,D
501B
PQ46448
TORSION SPRING
! 502
LP10013-051B
TOP COVER
503
QYTDSF3010R
SCREW,X4,TOP COVER(SIDE)
504
QYTDSF3010M
SCREW,TOP COVER(REAR)
505
PDV2544A
DRUM ASSY,A,B,C,D
PDV2547A
DRUM ASSY,E
510
QYSPSPD3008Z
SCREW,X3,DRUM
! 511
LP10108-016E
BOTTOM CHASSIS
! 512
LP10014-002C
BOTTOM COVER
515
QYTDSF4012Z
SCREW,MECHA
516
QYSPSFG3010Z
SCREW,X2,MECHA
! 517
QMP4A10-170
POWER CORD,A,B,C,E
!
QMP51K0-170-K
POWER CORD,D
519
LP40370-001F
ROLLER ARM ASSY
519A
PDM4311A-1
ROLLER ASSY
520
PQ45160
INERTIA PLATE
521
PQM30017-51
SLIT WASHER
522
QYSLSF2060D
SCREW
525
LP40700-001A
SPECIAL SCREW,MECHA
529
LP31019-005C
KNOB ASSY,B,C,D,E
LP31019-005D
KNOB ASSY,A
530
QYTPSFG2608Z
SCREW,X2,ADJ.JOG
531
QYTDSF2608Z
SCREW,X2,S JACK
532
QYTDSF3010Z
SCREW,MAIN
533
DPSF3010Z
SCREW,X3,MAIN
534
LP30871-003B
CAP(JACK)
543
LP40628-001B
PC SUPPORT,E
544
QYTDSF3008Z
SCREW,X2,S/P CONV.,B,E
WR4
QUQ212-0414CG
FFC WIRE,ADV.JOG CN7003
WR5
QUQ212-0456CG
FFC WIRE,S JACK CN7103
WR9
QUQ112-1140CG
FFC WIRE,S/P CONV. CN1601,B,E
WR10
QUQ112-0614CG
FFC WIRE,MINI FRONT CN7002,E


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5-4
5.3
MECHANISM ASSEMBLY <M4>
Classifi-
Part No.
Symbol in
cation
drawing
Grease
KYODO-SH-JB
AA
Oil
COSMO-HV56
BB
NOTE:The section marked in AA and BB
indicate lubrication and greasing areas.
WR3
WR1
87
39
1
15
91
86
40
127
128
137
138
138
130
90
89
88
131
75
74
38
105
105
107
31
30
107
112
123
151
113
115
124
125
79
82
21
4
117
44
26
3
58
52
57
58
55
90
37
77
72
116
50
112
122
110
126
126
89
36
73
69
102
70
134
78
76
71
120
42
85
46
47
81
83
80
49
119
53
111
114
118
121
96
93
94
95
64
51
65
18A
19
22
20
16
23A
63
66
59
62
68
24
18
84
61
60
67
23
23B
18B
WR2
A/C HEAD
BOARD ASSY <12>
LOADING MOTOR
BOARD ASSY <55>
48
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
BB
BB
BB
BB
BB
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA