JVC SRV10E - Service Manual Immediate Download

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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

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

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

STEREO DECODER

NICAM/A2

NICAM

LITHIUM BATTERY BACKUP

NOT USED

USED

VCR PLUS

SHOVIEW DELUXE

SHOWVIEW

VCRplus

INSTANT REC MAX TIME

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.

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.

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

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.

Chassis

Power cord,

primary wire

Region

USA & Canada

Europe & Australia

Grounding Impedance (Z)

0.1 ohm

0.5 ohm

AC inlet

Earth pin

Exposed accessible part

Milli ohm meter

Grounding Specifications

Fig. 10

Externally

exposed

accessible part

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

200 to 240 V

Japan

USA & Canada

Europe & Australia

10 M

/500 V DC

Region

Insulation Resistance (R)

1 M

/500 V DC

AC 3 kV 1 minute

(Class

AC 1.5 kV 1 minute

(Class

4 mm

8 mm (Power cord)

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

220 to 240 V

Japan

USA & Canada

1 mA rms

Exposed accessible parts

Antenna earth terminals

Other terminals

0.5 mA rms

0.7 mA peak

2 mA dc

0.7 mA peak

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.

S40888-01