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COPYRIGHT © 2002 VICTOR COMPANY OF JAPAN, LTD
This service manual is printed on 100% recycled paper.
SERVICE MANUAL
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
: RCA connectors:
VIDEO IN x 2, VIDEO OUT x 1,
AUDIO IN x 2, AUDIO OUT x 1
S-Video connectors:
IN x 2, 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. 6 months
Estimated figure based on provided
fresh battery; actual performance
may differ.
ACCESSORIES
Provided accessories
: RF cable,
S-video cable,
Audio/video cable,
Infrared remote control unit,
"R6" battery x 2,
Lithium battery CR2025,
BNC/RCA adapter x 2
Specifications shown are for SP mode unless otherwise
specified.
E.& O.E. Design and specifications subject to change without
notice.
No.82945
October 2002
SR-V10E,
SR-V10EK
SR-V10E, SR-V10EK V15S2
VIDEO CASSETTE RECORDER
SPECIFICATIONS (The specifications shown pertain specifically to the model SR-V10E.)
Note:
Most of the schematic diagrams for this model are the same as for the HR-S7950EU model. The schematic
diagram and circuit boards that are different in the case of the HR-S7950EU model are described below.
. MAIN(SYSCON) SCHEMATIC DIAGRAM page 4-57
. MAIN(MAIN TERMINAL) SCHEMATIC DIAGRAM page 4-53
. MAIN CIRCUIT BOARD page 4-55


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TABLE OF CONTENTS
Section
Title
Page
Section
Title
Page
DIFFERENCE LIST
Important Safety Precautions
INSTRUCTIONS
1. DISASSEMBLY
1.1 Manually removing the cassette tape ........................................ 1-1
1.2 Removing the major parts .......................................................... 1-2
1.2.1 How to read the procedure table .......................................... 1-2
1.2.2 Disassembly procedure ....................................................... 1-2
1.3 Emergency display function ....................................................... 1-4
1.3.1 Displaying the EMG information .......................................... 1-4
1.3.2 Clearing the EMG history ..................................................... 1-4
1.3.3 Details of the OSD display in the EMG display mode .................. 1-5
1.3.4 EMG content description ...................................................... 1-6
1.3.5 EMG detail information<1> .................................................. 1-7
1.3.6 EMG detail information<2> .................................................. 1-8
1.3.7 EMG detail information<3> .................................................. 1-8
1.4 Service position .......................................................................... 1-9
1.4.1 How to set the "Service position" ......................................... 1-9
1.5 Jig RCU mode ............................................................................ 1-9
1.5.1 Setting the Jig RCU mode ................................................... 1-9
1.5.2 Setting the User RCU mode ................................................ 1-9
1.6 Mechanism service mode .......................................................... 1-9
1.6.1 How to set the "Mechanism service mode" .......................... 1-9
1.6.2 How to exit from the "Mechanism service mode" ................. 1-9
1.7 Maintenance and inspection .................................................... 1-10
1.7.1 Cleaning ............................................................................. 1-10
1.7.2 Lubrication ......................................................................... 1-10
1.7.3 Suggested servicing schedule for main components ................. 1-10
1.8 Sevicing items related to video navigation ............................... 1-10
2. MECHANISM
2.1. Before disassembling/assembling ............................................ 2-1
2.1.1 Notes .................................................................................... 2-1
2.1.2 Mechanism operation check ................................................ 2-1
2.1.3 Setting the mechanism assembling mode ........................... 2-1
2.1.4 Layout of the main mechanism parts ................................... 2-2
2.1.5 Disassembling procedure table ............................................ 2-3
2.2. Replacement of the main mechanism parts .............................. 2-4
2.2.1 Cassette holder .................................................................... 2-4
2.2.2 A/C head .............................................................................. 2-5
2.2.3 Guide arm, pinch roller arm ................................................. 2-6
2.2.4 Idler arm, idler gear 1/2 ........................................................ 2-6
2.2.5 Main brake(T), brake lever, tension arm,reel disk(S/T), Rec safety lever .............. 2-6
2.2.6 Press lever, control cam, capstan brake assembly,loading motor assembly .............. 2-7
2.2.7 Capstan motor, load gear, control plate ............................... 2-8
2.2.8 Clutch unit assembly, direct gear ......................................... 2-9
2.3. Mechanism timing chart .......................................................... 2-10
3. ADJUSTMENT
3.1 Before adjustment ...................................................................... 3-1
3.1.1 Precaution ............................................................................. 3-1
3.1.2 Required test equipments .................................................... 3-1
3.1.3 Required adjustment tools ................................................... 3-1
3.1.4 Color(colour) bar signal, color(colour) bar pattern ............... 3-1
3.1.5 Switch settings ..................................................................... 3-1
3.1.6 Manual tracking mode (Auto tracking ON/OFF) setting ................. 3-1
3.1.7 EVR sdjustment ............................................................................. 3-2
3.2 Mechanism compatibility adjustment ......................................... 3-2
3.2.1 Tension pole position ............................................................ 3-3
3.2.2 FM waveform linearity .......................................................... 3-3
3.2.3 Height and tilt of the A/C head ............................................. 3-3
3.2.4 A/C head phase(X-value) ..................................................... 3-4
3.3 Electrical Adjustment .................................................................. 3-4
3.3.1 Servo circuit ......................................................................... 3-4
3.3.1.1 Switching point ................................................................ 3-4
3.3.1.2 Slow tracking preset ........................................................ 3-5
3.3.2 Video circuit .......................................................................... 3-5
3.3.2.1 EE Y/PB Y(S-VHS/VHS)level .......................................... 3-5
3.3.3 Audio circuit .......................................................................... 3-5
3.3.3.1 Audio REC FM ................................................................ 3-5
3.3.4 Syscon circuit(EU/EK MODEL) ............................................ 3-6
3.3.4.1 Timer clock ...................................................................... 3-6
3.3.5 PAL/SECAM converter circuit(MS MODEL) ......................... 3-6
3.3.5.1 Colour difference level .................................................... 3-6
3.3.5.2 SECAM burst position ..................................................... 3-6
4. CHARTS AND DIAGRAMS
4.1 BOARD INTERCONNECTIONS ................................................ 4-3
4.2 MAIN(VIDEO/N.AUDIO) SCHEMATIC DIAGRAM ..................... 4-5
4.3 MAIN(ON SCREEN) SCHEMATIC DIAGRAM ........................... 4-7
4.4 MAIN(SECAM) SCHEMATIC DIAGRAM [HR-S6950MS/S7955MS] ........... 4-8
4.5 MAIN(FMA) SCHEMATIC DIAGRAM ........................................ 4-9
4.6 MAIN(SYSCON) SCHEMATIC DIAGRAM ................................ 4-11
4.7 MAIN(SW.REG) SCHEMATIC DIAGRAM ................................ 4-13
4.8 MAIN(TUNER) SCHEMATIC DIAGRAM .................................. 4-15
4.9 MAIN(FRONT) ,MINI FRONT, S-JACK AND ADV.JOG SCHEMATIC DIAGRAM ... 4-17
4.10 MAIN(MAIN TERMINAL) SCHEMATIC DIAGRAM ................... 4-19
4.11 2D DIGITAL SCHEMATIC DIAGRAM [HR-S6950EU/S6955MS/S7955MS] ............ 4-21
4.12 3D/TBC (2M) SCHEMATIC DIAGRAM [HR-S7950EU/S7955EK] .................... 4-23
4.13 TERMINAL(S-SUB) SCHEMATIC DIAGRAM ........................... 4-25
4.14 TERMINAL(I/O) SCHEMATIC DIAGRAM .................................... 4-27
4.15 DEMODULATOR SCHEMATIC DIAGRAM ................................ 4-29
4.16 S-P CONVERTER SCHEMATIC DIAGRAM [HR-S6955MS/S7955MS] ......... 4-31
4.17 MAIN CIRCUIT BOARD ......................................................... 4-33
4.18 2D DIGITAL AND 3D DIGITAL/2M CIRCUIT BOARDS ......... 4-36
4.19 DEMODULATOR CIRCUIT BOARD ...................................... 4-37
4.20 S-P CONVERTER CIRCUIT BOARD[HR-S6955MS/S7955MS] ...... 4-37
4.21 TERMINAL CIRCUIT BOARD ........................................................... 4-38
4.22 WAVEFORMS ................................................................................... 4-39
4.23 VOLTAGE CHARTS .......................................................................... 4-41
4.24 REMOTE CONTROLLER SCHEMATIC DIAGRAM .................. 4-43
4.25 FDP GRID ASSIGNMENT AND ANODE CONNECTION ............... 4-43
4.26 CPU PIN FUNCTION ................................................................ 4-44
4.27 SYSTEM CONTROL BLOCK DIAGRAM ..................................... 4-45
4.28 VIDEO BLOCK DIAGRAM ......................................................... 4-47
4.29 AUDIO BLOCK DIAGRAM ......................................................... 4-51
4.30 MAIN(MAIN TERMINAL) SCHEMATIC DIAGRAM [SR-V10E, SR-V10EK] . 4-53
4.31 MAIN CIRCUIT BOARD [SR-V10E, SR-V10EK] ................... 4-55
4.32 MAIN(SYSCON) SCHEMATIC DIAGRAM [SR-V10E, SR-V10EK].. 4-57
5. PARTS LIST
5.1 PACKING AND ACCESSORY ASSEMBLY<M1> ...................... 5-1
5.2 FINAL ASSEMBLY<M2> ............................................................ 5-2
5.3 MECHANISM ASSEMBLY<M4> ................................................ 5-4
5.4 ELECTRICAL PARTS LIST ........................................................ 5-6
MAIN BOARD ASSEMBLY<03> .................................................... 5-6
3D D/2M BOARD ASSEMBLY<05> ............................................. 5-12
TERMINAL BOARD ASSEMBLY<06> ......................................... 5-13
A/C HEAD BOARD ASSEMBLY<12> .......................................... 5-15
DEMOD BOARD ASSEMBLY<14> .............................................. 5-15
S.JACK BOARD ASSEMBLY<36> ............................................... 5-15
ADV.JOG BOARD ASSEMBLY<38> ............................................ 5-15
LOADING MOTOR BOARD ASSEMBLY<55> ............................. 5-15


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1
The following table indicates main different points between models HR-S7950EU, SR-V10E and SR-V10EK.
MODEL
HR-S7950EU
ITEM
POWER PLUG
CEE
3 PIN
BODY COLOR
PURE SILVER
DARK GRAY
REPEAT TIMES
100
NO LIMIT
MESECAM
USED
NOT USED
16:9
USED
NOT USED
REAR L-1 INPUT
USED(SCART)
USED(S,V,LR)
REAR L-2 INPUT
USED
NOT USED
AV OUT
S,LR
S,V,LR
SATELLITE CONTROLLER TERMINAL
USED
NOT USED
REMOTE PAUSE TERMINAL
USED
NOT USED
REMOTE TERMINAL
NOT USED
USED
BROADCASTING STANDARD
B/G,D/K
I
STEREO DECODER
NICAM/A2
NICAM
LITHIUM BATTERY BACKUP
NOT USED
USED
VCR PLUS
SHOVIEW DELUXE
SHOWVIEW
VCRplus
INSTANT REC MAX TIME
6H
NO
REC LINK
USED(L-2)
USED(L-1)
VPS
USED
NOT USED
OSD LANGUAGE
13 LANGUAGES
ENGLISH
PRESET DOWNLOAD
USED
NOT USED
DIRECT REC
USED
NOT USED
TV AUTO POWER ON
USED
NOT USED
NEXTVIEW LINK
USED
NOT USED
REPEAT REC, PLAY
NOT USED
USED
SELECT RETURN POINT (PLAYBACK)
NOT USED
USED
SERIES REC, PLAY
NOT USED
USED
MODE LOCK
NOT USED
USED
DAY, TIME INSERT
NOT USED
USED
REC SAFETY ON/OFF
NOT USED
USED
LAST FUNCTION MEMORY
NOT USED
USED
OSD OFF(REC, PLAY)
NOT USED
USED
WIRED RCU
NOT USED
USED
DAILY TIMER RECORD
NOT USED
USED
SR-V10E
SR-V10EK
Note: Mark
is same as left.
Mark -- is not used.


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Important Safety Precautions
Prior to shipment from the factory, JVC products are strictly inspected to conform with the recognized product safety and electrical codes
of the countries in which they are to be sold. However, in order to maintain such compliance, it is equally important to implement the
following precautions when a set is being serviced.
Fig.1
1. Locations requiring special caution are denoted by labels and
inscriptions on the cabinet, chassis and certain parts of the
product. When performing service, be sure to read and com-
ply with these and other cautionary notices appearing in the
operation and service manuals.
2. Parts identified by the
symbol and shaded (
) parts are
critical for safety.
Replace only with specified part numbers.
Note: Parts in this category also include those specified to com-
ply with X-ray emission standards for products using
cathode ray tubes and those specified for compliance
with various regulations regarding spurious radiation
emission.
3. Fuse replacement caution notice.
Caution for continued protection against fire hazard.
Replace only with same type and rated fuse(s) as specified.
4. Use specified internal wiring. Note especially:
1) Wires covered with PVC tubing
2) Double insulated wires
3) High voltage leads
5. Use specified insulating materials for hazardous live parts.
Note especially:
1) Insulation Tape
3) Spacers
5) Barrier
2) PVC tubing
4) Insulation sheets for transistors
6. When replacing AC primary side components (transformers,
power cords, noise blocking capacitors, etc.) wrap ends of
wires securely about the terminals before soldering.
Power cord
Fig.2
10. Also check areas surrounding repaired locations.
11. Products using cathode ray tubes (CRTs)
In regard to such products, the cathode ray tubes themselves,
the high voltage circuits, and related circuits are specified for
compliance with recognized codes pertaining to X-ray emission.
Consequently, when servicing these products, replace the cath-
ode ray tubes and other parts with only the specified parts.
Under no circumstances attempt to modify these circuits.
Unauthorized modification can increase the high voltage value
and cause X-ray emission from the cathode ray tube.
12. Crimp type wire connector
In such cases as when replacing the power transformer in sets
where the connections between the power cord and power
transformer primary lead wires are performed using crimp type
connectors, if replacing the connectors is unavoidable, in or-
der to prevent safety hazards, perform carefully and precisely
according to the following steps.
1) Connector part number : E03830-001
2) Required tool : Connector crimping tool of the proper type
which will not damage insulated parts.
3) Replacement procedure
(1) Remove the old connector by cutting the wires at a point
close to the connector.
Important : Do not reuse a connector (discard it).
Fig.7
cut close to connector
Fig.3
(2) Strip about 15 mm of the insulation from the ends of
the wires. If the wires are stranded, twist the strands to
avoid frayed conductors.
15 mm
Fig.4
(3) Align the lengths of the wires to be connected. Insert
the wires fully into the connector.
Connector
Metal sleeve
Fig.5
(4) As shown in Fig.6, use the crimping tool to crimp the
metal sleeve at the center position. Be sure to crimp fully
to the complete closure of the tool.
1
Precautions during Servicing
7. Observe that wires do not contact heat producing parts
(heatsinks, oxide metal film resistors, fusible resistors, etc.)
8. Check that replaced wires do not contact sharp edged or
pointed parts.
9. When a power cord has been replaced, check that 10-15 kg of
force in any direction will not loosen it.
1.25
2.0
5.5
Crimping tool
Fig.6
(5) Check the four points noted in Fig.7.
Not easily pulled free
Crimped at approx. center
of metal sleeve
Conductors extended
Wire insulation recessed
more than 4 mm
S40888-01


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Safety Check after Servicing
Examine the area surrounding the repaired location for damage or deterioration. Observe that screws, parts and wires have been
returned to original positions, Afterwards, perform the following tests and confirm the specified values in order to verify compli-
ance with safety standards.
1. Insulation resistance test
Confirm the specified insulation resistance or greater between power cord plug prongs and
externally exposed parts of the set (RF terminals, antenna terminals, video and audio input
and output terminals, microphone jacks, earphone jacks, etc.). See table 1 below.
2. Dielectric strength test
Confirm specified dielectric strength or greater between power cord plug prongs and exposed
accessible parts of the set (RF terminals, antenna terminals, video and audio input and output
terminals, microphone jacks, earphone jacks, etc.). See table 1 below.
3. Clearance distance
When replacing primary circuit components, confirm specified clearance distance (d), (d') be-
tween soldered terminals, and between terminals and surrounding metallic parts. See table 1
below.
4. Leakage current test
Confirm specified or lower leakage current between earth ground/power cord plug prongs
and externally exposed accessible parts (RF terminals, antenna terminals, video and audio
input and output terminals, microphone jacks, earphone jacks, etc.).
Measuring Method : (Power ON)
Insert load Z between earth ground/power cord plug prongs and externally exposed accessi-
ble parts. Use an AC voltmeter to measure across both terminals of load Z. See figure 9 and
following table 2.
5. Grounding (Class 1 model only)
Confirm specified or lower grounding impedance between earth pin in AC inlet and externally exposed accessible parts (Video in,
Video out, Audio in, Audio out or Fixing screw etc.).
Measuring Method:
Connect milli ohm meter between earth pin in AC inlet and exposed accessible parts. See figure 10 and grounding specifications.
d'
d
Chassis
Power cord,
primary wire
Region
USA & Canada
Europe & Australia
Grounding Impedance (Z)
Z
0.1 ohm
Z
0.5 ohm
AC inlet
Earth pin
Exposed accessible part
Milli ohm meter
Grounding Specifications
Fig. 10
ab
c
V
Externally
exposed
accessible part
Z
Fig. 9
Fig. 8
Clearance Distance (d), (d')
d, d'
3 mm
d, d'
4 mm
d, d'
3.2 mm
1 M
R 12 M/500 V DC
Dielectric Strength
AC 1 kV 1 minute
AC 1.5 kV 1 miute
AC 1 kV 1 minute
AC Line Voltage
100 V
100 to 240 V
110 to 130 V
110 to 130 V
200 to 240 V
Japan
USA & Canada
Europe & Australia
R
10 M
/500 V DC
Region
Insulation Resistance (R)
R
1 M
/500 V DC
AC 3 kV 1 minute
(Class
2)
AC 1.5 kV 1 minute
(Class
1)
d
4 mm
d'
8 mm (Power cord)
d'
6 mm (Primary wire)
Table 1 Specifications for each region
a, b, c
Leakage Current (i)
AC Line Voltage
100 V
110 to 130 V
110 to 130 V
220 to 240 V
Japan
USA & Canada
i
1 mA rms
Exposed accessible parts
Exposed accessible parts
Antenna earth terminals
Other terminals
i
0.5 mA rms
i
0.7 mA peak
i
2 mA dc
i
0.7 mA peak
i
2 mA dc
Europe & Australia
Region
Load Z
1 k
2 k
1.5 k
0.15
µF
50 k
Table 2 Leakage current specifications for each region
Note: These tables are unofficial and for reference only. Be sure to confirm the precise values for your particular country and locality.
2
S40888-01