JVC HR-S9700EK/EU - Service Manual Immediate Download

SERVICE MANUAL

No. 82822

August 2000

HR-S9700EK/EU

SPECIFICATIONS (The specifications shown pertain specifically to the model HR-S9700EU)

VIDEO CASSETTE RECORDER

Printed in Japan

VICTOR COMPANY OF JAPAN, LIMITED

VIDEO DIVISION

S40894

This service manual is printed on 100% recycled paper.

HR-S9700EK/EU

No.

82822

GENERAL

Power requirement

: AC 220 V 240 V` , 50 Hz/60 Hz

Power consumption

Power on

: 25 W

Power off

: 5.2 W

Temperature

Operating

: 5°C to 40°C

Storage

: 20°C to 60°C

Operating position

: Horizontal only

Dimensions (WxHxD)

: 437 mm x 106 mm x 352 mm

Weight

: 5.1 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 connectors:

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. 60 min.

ACCESSORIES

Provided accessories

: RF cable,

S-Video cable,

Satellite Controller RM-SD1,

Infrared remote control unit,

"R6" battery x 2,

S-VHS ET labels

Specifications shown are for SP mode unless otherwise specified.

E.& O.E. Design and specifications subject to change without notice.

Important Safety Precautions

INSTRUCTIONS

1. DISASSEMBLY

1.1 DISASSEMBLY FLOW CHART ............................................................ 1-1

1.2 HOW TO READ THE DISASSEMBLY AND ASSEMBLY ...................... 1-1

1.3 DISASSEMBLY/ASSEMBLY METHOD ................................................ 1-1

1.4 SERVICE POSITION ............................................................................ 1-4

1.4.1 How to take out the Mechanism and Main board assemblies ......... 1-4

1.4.2 Precautions for cassette loading in the "SERVICE POSITION" ...... 1-5

1.4.3 Cassette loading and ejection methods

in the "SERVICE POSITION"(See Fig. 1-4-3). ................................ 1-5

1.5 MECHANISM SERVICE MODE ........................................................... 1-5

1.5.1 How to set the "MECHANISM SERVICE MODE" ............................ 1-5

1.6 EMERGENCY DISPLAY FUNCTION ................................................... 1-6

1.6.1 Displaying the emergency information ............................................ 1-6

1.6.2 Clearing the emergency history ....................................................... 1-6

1.6.3 Emergency content description ....................................................... 1-7

1.6.4 Emergency detail information 1 ...................................................... 1-8

1.6.5 Emergency detail information 2 ..................................................... 1-9

1.7 SERVICING THE VIDEO NAVIGATION FUNCTION ......................... 1-10

1.7.1 Copying the video navigation data ................................................ 1-10

1.7.2 Erasing the video navigation data (Initialization) ........................... 1-11

1.7.3 Factory setting level during shipment ........................................... 1-11

2. MECHANISM ADJUSTMENT

2.1 BEFORE STARTING REPAIR AND ADJUSTMENT ............................. 2-1

2.1.1 Precautions ...................................................................................... 2-1

2.1.2 Checking for Proper Mechanical Operations ................................... 2-1

2.1.3 Manually Removing the Cassette Tape ........................................... 2-1

2.1.4 Jigs and Tools Required for Adjustment .......................................... 2-2

2.1.5 Maintenance and Inspection ............................................................ 2-3

2.2 REPLACEMENT OF MAJOR PARTS .................................................. 2-6

2.2.1 Before Starting Disassembling (Phase matching between

mechanical parts) ............................................................................ 2-6

2.2.2 How to Set the Mechanism Assembling Mode ................................ 2-6

2.2.3 Cassette Holder Assembly .............................................................. 2-6

2.2.4 Pinch Roller Arm Assembly ............................................................. 2-8

2.2.5 Guide Arm Assembly and Press Lever Assembly ............................ 2-8

2.2.6 Audio Control Head ......................................................................... 2-8

2.2.7 Loading Motor .................................................................................. 2-8

2.2.8 Capstan Motor ................................................................................. 2-9

2.2.9 Pole Base Assembly (supply or take-up side) ................................. 2-9

2.2.10 Rotary Encoder ........................................................................... 2-10

2.2.11 Clutch Unit .................................................................................. 2-10

2.2.12 Change Lever Assembly, Direct Gear, Clutch Gear and Coupling Gear ...... 2-10

2.2.13 Link Lever ................................................................................... 2-11

2.2.14 Cassette Gear, Control Cam and Worm Gear ............................ 2-11

2.2.15 Control Plate ............................................................................... 2-11

2.2.16 Loading Arm Gear (supply or take-up side) and Loading Arm Gear Shaft ... 2-12

2.2.17 Take-up Lever, Take-up Head and Control Plate Guide ............. 2-13

2.2.18

Capstan Brake Assembly .......................................................... 2-13

2.2.19 Sub Brake Assembly (take-up side) ........................................... 2-13

2.2.20 Main Brake Assembly (take-up side), Reel Disk

(take-up side) and Main Brake Assembly (supply side) .............. 2-13

2.2.21 Tension Brake Assembly, Reel Disk (supply side) and

Tension Arm Assembly ............................................................... 2-14

2.2.22 Idler Lever, Idler Arm Assembly .................................................. 2-14

2.2.23 Stator Assembly .......................................................................... 2-14

2.2.24 Rotor Assembly .......................................................................... 2-14

2.2.25 Upper Drum Assembly ................................................................ 2-15

2.3 COMPATIBILITY ADJUSTMENT ........................................................ 2-16

2.3.1 Checking/Adjustment of FM Waveform Linearity ........................... 2-16

2.3.2 Checking/Adjustment of the Height and Tilt of the Audio Control Head .... 2-17

2.3.3 Checking/Adjustment of the Audio Control Head Phase (X-Value) ..... 2-17

2.3.4 Checking/Adjustment of the Standard Tracking Preset ................. 2-18

2.3.5 Checking/Adjustment of the Tension Pole Position ....................... 2-18

3. ELECTRICAL ADJUSTMENT

3.1 PRECAUTION ..................................................................................... 3-1

3.1.1 Required test equipments .............................................................. 3-1

3.1.2 Required adjustment tools ............................................................... 3-1

TABLE OF CONTENTS

Section

Title

Page

Section

Title

Page

3.1.3 Color (colour) bar signal,Color (colour) bar pattern ........................ 3-1

3.1.4 Switch settings and standard precautions ....................................... 3-1

3.1.5 EVR Adjustment .............................................................................. 3-1

3.2 SERVO CIRCUIT .................................................................................. 3-2

3.2.1 Switching point ................................................................................ 3-2

3.2.2 Slow tracking preset ........................................................................ 3-2

3.2.3 Dynamic Drum preset ...................................................................... 3-2

3.3 VIDEO CIRCUIT ................................................................................... 3-3

3.3.1 D/A level .......................................................................................... 3-3

3.3.2 EE Y level ........................................................................................ 3-3

3.3.3 PB Y level (S-VHS / VHS) ............................................................... 3-3

3.3.4 REC color (colour) level ................................................................... 3-4

3.3.5 Video EQ (Frequency response) ..................................................... 3-4

3.3.6 AUTO PICTURE initial setting ......................................................... 3-5

3.4 AUDIO CIRCUIT ................................................................................... 3-5

3.4.1 Audio REC FM ................................................................................. 3-5

3.5 SYSCON CIRCUIT ............................................................................... 3-5

3.5.1 Timer clock ...................................................................................... 3-5

4. CHARTS AND DIAGRAMS

NOTES OF SCHEMATIC DIAGRAM .......................................................... 4-1

CIRCUIT BOARD NOTES ........................................................................... 4-2

4.1 BOARD INTERCONNECTIONS .......................................................... 4-3

4.2 VIDEO/AUDIO AND AUDIO ERASE SCHEMATIC DIAGRAMS ............ 4-5

4.3 VSC SCHEMATIC DIAGRAM ................................................................. 4-7

4.4 SYSTEM CONTROL SCHEMATIC DIAGRAM ....................................... 4-9

4.5 SWITCHING REGULATOR SCHEMATIC DIAGRAM .......................... 4-11

4.6 TUNER SCHEMATIC DIAGRAM .......................................................... 4-13

4.7 CONNECTION SCHEMATIC DIAGRAM .............................................. 4-15

4.8 3D DIGITAL/2M SCHEMATIC DIAGRAM ............................................. 4-17

4.9 TERMINAL SCHEMATIC DIAGRAM .................................................... 4-19

4.10 DEMODULATOR SCHEMATIC DIAGRAM ..................................... 4-21

4.11 S-SUB SCHEMATIC DIAGRAM ...................................................... 4-23

4.12 NAVIGATION SCHEMATIC DIAGRAM [LPB10108-001*] ............... 4-25

4.13 NAVIGATION SCHEMATIC DIAGRAM [LPB10108-002*] ............... 4-27

4.14 SW/DISPLAY AND REC SAFETY SCHEMATIC DIAGRAMS ........ 4-29

4.15 3D DIGITAL/2M AND S-SUB CIRCUIT BOARDS ........................... 4-31

4.16 TERMINAL CIRCUIT BOARD .......................................................... 4-32

4.17 MAIN, A/C HEAD, AUDIO ERASE AND LOADING MOTOR

CIRCUIT BOARDS ........................................................................... 4-33

4.18 NAVIGATION CIRCUIT BOARD ...................................................... 4-36

4.19 DEMODULATOR, SW/DISPLAY AND REC SAFETY CIRCUIT BOARDS . 4-37

4.20 FDP GRID ASSIGNMENT AND ANODE CONNECTION ............... 4-39

4.21 REMOTE CONTROL AND MEMBRANE DOOR

SCHEMATIC DIAGRAMS ................................................................ 4-40

4.22 WAVEFORMS .................................................................................. 4-41

4.23 VOLTAGE CHARTS ......................................................................... 4-43

4.24 CPU PIN FUNCTION ....................................................................... 4-45

4.25 SYSTEM CONTROL BLOCK DIAGRAM ......................................... 4-47

4.26 VIDEO BLOCK DIAGRAM ............................................................... 4-49

4.27 AUDIO BLOCK DIAGRAM ............................................................... 4-53

5. PARTS LIST

5.1 PACKING AND ACCESSORY ASSEMBLY <M1> ............................... 5-1

5.2 CABINET AND CHASSIS 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 DIGITAL/2M BOARD ASSEMBLY <05> ........................................ 5-13

TERMINAL BOARD ASSEMBLY <06> ............................................... 5-14

AUDIO CONTROL HEAD BOARD ASSEMBLY <12> ........................ 5-16

DEMOD BOARD ASSEMBLY <14> ................................................... 5-16

S-SUB BOARD ASSEMBLY <15> ...................................................... 5-17

NAVIGATION BOARD ASSEMBLY <19> [LPB10108-001*] ............... 5-17

NAVIGATION BOARD ASSEMBLY <19> [LPB10108-002*] ............... 5-18

DISPLAY BOARD ASSEMBLY <28> .................................................. 5-19

REC SAFETY BOARD ASSEMBLY <32> .......................................... 5-20

AUDIO ERASE BOARD ASSEMBLY <46> ........................................ 5-20

LOADING MOTOR BOARD ASSEMBLY <55> .................................. 5-20

HR-S9700EK

HR-S9700EU

VIDEO SYSTEM

PAL/NTSC PB ON PAL TV

PAL/MESECAM (MANUAL)/NTSC PB ON PAL TV

TUNER (BROADCASTING STANDARD)

B/G, D/K

TUNER (STEREO DECODER)

NICAM

NICAM/A2

TUNER (RF OUT SYSTEM)

G, K

DISPLAY (LANG.)

ENGLISH

14LANGUAGE

TIMER (VCR PLUS+)

VIDEO PLUS+ DELUXE

SHOW VIEW DELUXE

TIMER (VPS)

NOT USED

USED

The following table lists the differing points between Models (HR-S9700EK AND HR-S9700EU) in this series.

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 in-

scriptions on the cabinet, chassis and certain parts of the product.

When performing service, be sure to read and comply with these

and other cautionary notices appearing in the operation and serv-

ice 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 compli-

ance 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 trans-

former primary lead wires are performed using crimp type connec-

tors, if replacing the connectors is unavoidable, in order 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.

1.2

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 compliance with safety

standards.

1. Insulation resistance test

Confirm the specified insulation resistance or greater between power cord plug prongs and exter-

nally 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 acces-

sible 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 accessible

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.

Fig. 10

Fig. 9

Fig. 8

Table 1 Specifications for each region

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

Externally

exposed

accessible part

1-1

----------------------

Top cover

D1 4(S1a),(S1b)

Bracket

2(S1c)

Bottom cover

D2 4(L2a), Foot (rear), <Note 2>

4(L2b), Foot assy,

(S2a),2(S2b),4(L2c),

3(L2d)

Front panel assembly D3-1 9(L3),

CN7002(WR3a)

(Membrane door assy) D3-2 (S3a),Holder,

2(S3b),Damper assy,

(S3c),(WR3b),

(WR3c)

Drum assembly

D4 3(S4),

CON1(WR4a),

CN1(WR4b)

(Inertia plate)

4(L4a)

(Roller arm assy)

(P4), (L4b)

Mechanism assembly D5 CN1(WR5),2(S5a),

(S5b),(S5c),2(L5)

SW/Display board

D6 CN7001(WR6a),

assembly

CN7191(WR6b),

CN7192(WR6c),

(L6a),

REC safety board assy,

2(L6b), 4(L6c)

Main board assembly

D7 2(S7a), (S7b)

------------------

SECTION 1

DISASSEMBLY

1.3 DISASSEMBLY/ASSEMBLY METHOD

1.1 DISASSEMBLY FLOW CHART

This flowchart lists the disassembling steps for the cabinet

parts and P.C. boards in order to gain access to item(s)

to be serviced. When reassembling, perform the step(s) in

reverse order. Bend, route and dress the flat cables as they

were originally laid.

1.2 HOW TO READ THE DISASSEMBLY AND ASSEMBLY

· When attaching the Bottom cover, make sure that the Earth

plate of the Bottom cover is passed through the hole of the

Bottom chassis and then touches the GND (Ground) on the

Main board assembly.

· Be careful not to damage the connector and wire etc. during

connection and disconnection.

When connecting the wire to the connector, be careful with the

wire direction.

· When reattaching the Front panel assembly, make sure that

the door opener a of the Cassette holder assembly is lowered

in position prior to the reinstallation.

· When fixing the screw (S3c), jointly secure the lug wires (WR3b

and WR3c).

· When it is required to remove the screws (S5a) retaining the

Mechanism assembly, please refer to the "Procedures for Low-

ering the Cassette holder assembly"(See on page 1-2).

· When removing the Mechanism assembly only, unhook the two

spacers connecting it with the Main board assembly with pliers

from the back side of the Main board assembly first, and then

remove the Mechanism assembly.

· When reattaching the Mechanism assembly to the Main board

assembly, take care not to damage the sensors on the Main

board assembly (D3001: LED, Q3002: Start sensor, Q3003:

End sensor, S3002: S cassette switch).

· The wire (WR5) has excess length that may be loose, as it is

quite long. After inserting the wire and connectors, the loose

portion of the wire should be taken up and accommodated be-

tween the A/C head base and the main deck.

· The REC safety board assembly is attached to the SW/Display

board assembly. It is therefore necessary to remove the REC safety

board assembly before removing the SW/Display board assembly.

Top cover, Bracket

Bottom cover

Front panel assembly

Drum assembly

Mechanism assembly

SW/Display board assembly

Main board assembly

Step/

LocNo.

Part Name

Fig.

No.

Point

Note

Note:

· The bracketed ( ) WR of the connector symbol are as-

signed nos. in priority order and do not correspond to

those on the spare parts list.

(5) Adjustment information for installation

(1)

(2)

(3)

(4)

(5)

Step/

LocNo.

Part Name

Fig.

No.

Point

Note

Top cover,

D1 4(S1a),(S1b),3(L1a),

2(SD1a),(P1a),

CN1(WR1a),

Bracket

2(S1c)

(1) Order of steps in Procedure

When reassembling, perform the step(s) in the reverse order.

These numbers are also used as the identification (location) No.

of parts Figures.

(2) Part name to be removed or installed.

(3) Fig. No. showing procedure or part location.

(4) Identification of part to be removed, unhooked, unlocked,

released, unplugged, unclamped or unsoldered.

P= Spring, W= Washer, S= Screw, L= Locking tab, SD= Solder,

CN**(WR**)= Remove the wire (WR**) from the connector

(CN**).