Jvc HR-XV28-SEF Service Manual

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Page 1

SERVICE MANUAL

DVD PLAYER & VIDEO CASSETTE RECORDER

YD06820055

HR-XV28SEF,HR-XV28SEK, HR-XV28SER,HR-XV28SEU, HR-XV28SEY,HR-XV28SEZ

(EK model)

(EU, EY, EZ models)

(EF, ER models)

(EF model)

HR-XV28SEF,HR-XV28SEK,HR-XV28SER,HR-XV28SEU,HR-XV28SEY,HR-XV28SEZ [D5PV0]

TABLE OF CONTENTS

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

2 SPECIFIC SERVICE INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6

3 DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-9

4 ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-10

5 TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-37

No.YD068

2005/5

Page 2

SPECIFICATION

HR-XV28SEF HR-XV28SEK HR-XV28SER/SEU/SEY/SEZ

General

Power requirement AC 200V - 240V, 50 Hz

Power consumption 17 W

Dimensions (approx.) 430 × 78.5 × 265 mm (w/h/d)

Mass (approx.) 4.2 kg

Operating temperature 5°C to 35°C (41°F to 95°F)

Operating humidity 5 % to 90 %

Timer 24 hours display type

RF Modulator - UHF 22-68 (Adjustable)

System

Laser Semiconductor laser, wavelength 650 nm

Video Head system Double azimuth 6 heads, helical scanning.

Signal system PAL

Frequency response DVD (PCM 96 kHz): 8 Hz to 44 kHz, DVD (PCM 48 kHz): 8 Hz to 22 kHz, CD: 8 Hz to 20 kHz

Signal-to-noise ratio More than 100 dB (ANALOG OUT connectors only)

Harmonic distortion Less than 0.008%

Dynamic range More than 100 dB (DVD), More than 95 dB (CD)

Inputs (VCR)

Audio -6.0 dBm, more than 10 kΩ (SCART), -6.0 dBm, more than 47 kΩ (RCA) Video 1.0 V (p-p), 75 Ω, unbalanced (SCART/RCA)

Outputs (DVD)

VIDEO OUT 1 Vp-p 75 Ω, sync negative

Audio output (digital audio) 0.5 V (p-p), 75 Ω, RCA jack × 1

Audio output (analog audio) 2.0 Vrms (1 kHz, 0 dB), 600 Ω, RCA jack (L, R) x 1/SCART (TO TV)

Outputs (VCR/DVD)

Audio -6.0 dBm, less than 1 kΩ (SCART) Video 1.0 V (p-p), 75 Ω, unbalanced (SCART)

• Designs and specifications are subject to change without notice.

• Manufactured under license from Dolby Laboratories. "Dolby", "Pro Logic" and the double-D symbol are trademarks of Dolby Laboratories.

• DTS and DTS Digital Out are trademarks of Digital Theater Systems, Inc.

• SHOWVIEW is a trademark of Gemstar Development Corporation. The SHOWVIEW system is manufactured under license from Gemstar Development Corporation.(EF/ER/EU/EY/EZ models)

• VIDEO Plus+ and PlusCode are registered trademarks of Gemstar Development Corporation. The VIDEO Plus+ system is manufactured under license from Gemstar Development Corporation.(EK model)

1-2 (No.YD068)

Page 3

SECTION 1

PRECAUTION

1.1 SAFTY 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.

1.1.1 Precautions during Servicing

(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 comply 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 comply 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:

• Wires covered with PVC tubing

• Double insulated wires

• High voltage leads

(5) Use specified insulating materials for hazardous live parts.

Note especially:

• Insulation Tape

• PVC tubing

•Spacers

• Insulation sheets for transistors

•Barrier

(6) When replacing AC primary side components (transformers,

power cords, noise blocking capacitors, etc.) wrap ends of wires securely about the terminals before soldering.

Consequently, when servicing these products, replace the cathode 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 connectorIn 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 connectors, if replacing the connectors is unavoidable, in order to prevent safety hazards, perform carefully and precisely according to the following steps.

• Connector part number :E03830-001

• Required tool : Connector crimping tool of the proper type which will not damage insulated parts.

• Replacement procedure

a) Remove the old connector by cutting the wires at a

point close to the connector.Important : Do not reuse a connector (discard it).

cut close to connector

Fig.1-1-3

b) 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.1-1-4

c) Align the lengths of the wires to be connected. In-

sert the wires fully into the connector.

Metal sleeve

Fig.1-1-1

(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.

Power cord

Fig.1-1-2 (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.

Connector

Fig.1-1-5

d) As shown in Fig.1-1-6, 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.

1.2 5

5.5

Crimping tool

Fig.1-1-6

e) Check the four points noted in Fig.1-1-7.

Not easily pulled free

Wire insulation recessed

more than 4 mm

Crimped at approx. cente

of metal sleeve

Conductors extended

Fig.1-1-7

(No.YD068)1-3

Page 4

1.1.2 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 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 Fig.1-1-11 below.

(3) Clearance distance

When replacing primary circuit components, confirm specified clearance distance (d), (d') between soldered terminals, and between terminals and surrounding metallic parts. See Fig.1-1-11 below.

Chassis

Power cord primary wire

Fig.1-1-8

(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 Fig.1-1-9 and following Fig.1-1-12.

Externally exposed accessible part

Fig.1-1-9

(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 Fig.1-1-10 and grounding specifications.

AC inlet

Earth pin

Exposed accessible part

MIlli ohm meter

Grounding Specifications

Region

USA & Canada

Europe & Australia

Grounding Impedance (Z

Z 0.1 ohm

Z 0.5 ohm

)

Fig.1-1-10

AC Line Voltage

100 V

100 to 240 V

110 to 130 V

200 to 240 V

Region

Japan

USA & Canada

Europe & Australia

Insulation Resistance (R

R 1 M /500 V DC

1 M R 12 M /500 V DC

R 10 M /500 V DC

)

Dielectric Strength

AC 1 kV 1 minute

AC 1.5 kV 1 minute

AC 1 kV 1 minute AC 3 kV 1 minute

AC 1.5 kV 1 minute

(

Class

(

Class

Clearance Distance (d), (d'

d, d' 3 mm

d, d' 4 mm

d, d' 3.2 mm

d 4 m m

)

d' 8 m m (Power cord d' 6 m m (Primary wire

)

Fig.1-1-11

AC Line Voltage

100 V

110 to 130 V

220 to 240 V

Region

Japan

USA & Canada

Europe & Australia

Load Z

0.15

1.5

Leakage Current (i)

i 1 mA rms

i 0.5 mA rms

i 0.7 mA peak i 2 mA dc

a, b, c

Exposed accessible parts

Antenna earth terminals

Other terminals

Fig.1-1-12

NOTE :

These tables are unofficial and for reference only. Be sure to confirm the precise values for your particular country and locality.

)

1-4 (No.YD068)

Page 5

1.2 Preventing static electricity

Electrostatic discharge (ESD), which occurs when static electricity stored in the body, fabric, etc. is discharged, can destroy the laser diode in the traverse unit (optical pickup). Take care to prevent this when performing repairs.

1.2.1 Grounding to prevent damage by static electricity

Static electricity in the work area can destroy the optical pickup (laser diode) in devices such as DVD players. Be careful to use proper grounding in the area where repairs are being performed.

(1) Ground the workbench

Ground the workbench by laying conductive material (such as a conductive sheet) or an iron plate over it before placing the traverse unit (optical pickup) on it.

(2) Ground yourself

Use an anti-static wrist strap to release any static electricity built up in your body.

(3) Handling the optical pickup

• In order to maintain quality during transport and before installation, both sides of the laser diode on the replacement optical pickup are shorted. After replacement, return the shorted parts to their original condition. (Refer to the text.)

• Do not use a tester to check the condition of the laser diode in the optical pickup. The tester's internal power source can easily destroy the laser diode.

(No.YD068)1-5

Page 6

SECTION 2

SPECIFIC SERVICE INSTRUCTIONS

2.1 DIFFERENT TABLE OF FEATURE

The following table indicates main different points between models HR-XV28SEF, HR-XV28SEK, HR-XV28SER, HR-XV28SEU and HR-XV28SEY/EZ.

MODEL NAME HR-XV28SEF HR-XV28SEK HR-XV28SER

SCART CABLE PROVIDED ← OPTIONAL BROADCASTING SYSTEM PAL B/G, SECAM L PAL I, I/I, B/G, SECAM D/K, K1 ←

RF OUT CH/RF OUT SYSTEM [INITIAL]

OSD LANGUAGES

REGIONAL CODE REGIONAL CODE : 2 ← REGIONAL CODE : 5

MODEL NAME HR-XV28SEU HR-XV28SEY/EZ

SCART CABLE OPTIONAL ← BROADCASTING SYSTEM PAL I, I/I, B/G, SECAM D/K, K1 ←

RF OUT CH/RF OUT SYSTEM [INITIAL]

OSD LANGUAGES

REGIONAL CODE REGIONAL CODE : 2 ←

Note:

Mark ← is same as left.

ENGLISH/GERMANY/FRENCH/

ITALIAN/SPANISH/DUTCH

ENGLISH/GERMANY/ITALIAN/

SPANISH/GREEK/PORTU-

NOT USED 22-68CH,[36CH]/I 22-68CH,[36CH]/K

ENGLISH/GERMANY/ITALIAN/

SPANISH/GREEK/PORTU-

GUESE

22-68CH,[36CH]/G ←

ENGLISH/POLISH/CZECH/

HUNGARIAN/SWEDISH/GER-

GUESE

MANY

ENGLISH/RUSSIAN

1-6 (No.YD068)

Page 7

2.2 SERVICE INFORMATION FOR EEPROM IC SETTING(VCR)

EEPROM option code No. setting EEPROM option code No. setting procedure

NAME HEX BINARY OPT0 00 00000000

OPT1 00 00000000 OPT2 00 00000000 OPT3 00 00000000 OPT4 00 00000000 OPT5 00 00000000

12/26 - 00 V00 -COM Ver. ID : LG VERSION : 05 ROM DATE : 02.17.05 Correction Ver.

MODEL NAME HEX BINARY HR-XV28SEU OPT0 00 00000000 OPT1 54 00000000 OPT2 60 00000000 OPT3 47 00000000 OPT4 03 00000000 OPT5 0B 00000000 HR-XV28SEK OPT0 00 00000000 OPT1 54 00000000 OPT2 21 00000000 OPT3 87 00000000 OPT4 0D 00000000 OPT5 0B 00000000 HR-XV28SEZ OPT0 00 00000000 OPT1 54 00000000 OPT2 63 00000000 OPT3 47 00000000 OPT4 0D 00000000 OPT5 0B 00000000 HR-XV28SEY OPT0 00 00000000 OPT1 54 00000000 OPT2 63 00000000 OPT3 47 00000000 OPT4 0B 00000000 OPT5 0B 00000000 HR-XV28SER OPT0 09 00000000 OPT1 54 00000000 OPT2 A3 00000000 OPT3 47 00000000 OPT4 0D 00000000 OPT5 0B 00000000 HR-XV28SEF OPT0 00 00000000 OPT1 5C 00000000 OPT2 E8 00000000 OPT3 47 00000000 OPT4 01 00000000 OPT5 0B 00000000 WR : OK I : EXIT MOVE : EDIT :

1. DETECT NEW EEPROM (OPTION EDIT SCREEN)

- Eeprom EDIT screen automatically appears if replacing Eeprom.

- Setup option data using the cursor Up/Down key of a remote control. (Setup upon BOM depending on OPT0~OPT5 model) Since an initial remote control is set to LG for LG model, appropriately set optiona data using the cursor Up/Down key.

2. EEPROM WRITED AND EEPROM INITIAL

- Writes data on EEPROM by using REMOCON "OK" + FRONT PLAY KEY FOR MORE THAN 5 SECONDS.

3. PG ADJUST

1) Payback the SP standard tape

2) Press the "OK" key on the Remote controller and the "PLAY" key on the Front Panel the same time, then it goes in to Tracking initial mode.

3) Repeat the above step(No.2), then it finishes the PG adjusting automatically.

4) Stop the playback, then it goes out to PG adjusting mode after mony the PG data.

4. BUYER SELECTION

- Font ejection key + open/close key for more than 5 seconds.

- Option code is displayed in TV

- First byte of OPTO is changed whenever front eject key + open/close key.

- JVC remote conroller No.0.

(No.YD068)1-7

Page 8

2.3 SERVICE INFORMATION FOR EEPROM (DVD)

POWER ON

DVD LOGO Status (NO Disk status)

DETECT NEW EEPROM (OPTION EDIT SCREEN)

Remote control Pause key 1 4 7 2 in order.

Press number 0~9, Press charater A~F (1~6 for a while)

Use arrow key ( ) to move to approprite position and make changes

Press pause key once

Change will be applied when power

OFF ON.

MODEL NAME HEX HEX HEX HEX HEX HEX

OPT 1 44 47 50 53 52 42 OPT 2 45 42 4C 45 55 45 OPT 3 00 00 00 00 00 00 OPT 4 D3 D3 D3 D3 D3 D3 OPT 5 12 12 12 12 12 12 OPT 6 05 05 05 05 05 05 OPT 7 30 30 30 30 30 30 OPT 8 00 00 00 00 00 00 OPT 9 00 00 00 00 00 00 OPT A 00 00 00 00 00 00 OPT B 80 80 80 80 80 80 OPT C 00 00 00 00 0A 00 OPT D 00 00 00 00 00 00 OPT E 00 00 00 00 00 00 OPT F 00 00 00 00 00 00 OPT G 00 00 00 00 00 00

HR-XV28SEU HR-XV28SEK HR-XV28SEZ HR-XV28SEY HR-XV28SER HR-XV28SEF

* OPTION

NTSC model does not have VCR option and use DVD option B~F as VCR option. (only DVD exist) PAL model has another separate VCR option. (Both VCR and DVD exist)

1-8 (No.YD068)

Page 9

SECTION 3

DISASSEMBLY

This service manual does not describe DISASSEMBLY.

(No.YD068)1-9

Page 10

SECTION 4

ADJUSTMENT

4.1 POSITION DRAWING OF DECK MECHANISM PARTS (VCR)

Top View

17 19

Bottom View

NOTE : Assembly order is a reverse of disassembly order.

34 28

Order Of Dis-

assembled Parts firstly Disassembled

Drum Assembly

Plate Top 2 2,3 2,3,4 2,3,4,5

2,3 2,3 2,3,13,14

17 17

17,18

21,22

21 21,22,23, 24,25,26 21,22,23, 24,25,26,27 21,22,23, 24,25,26,27 21,22,23, 24,25,26,27 25

2,3,14, 25,31 25,31 2,3,14

Holder Assembly CST

Gear Assembly Rack F/L

Opener Door

Arm Assembly F/L

Lever Assembly S/W

Motor Assembly L/D

Gear Wheel

Arm Assembly Cleaner

Head F/E

Base Assembly A/C Head

Brake Assembly T

Arm Assembly Tension

Reel S / Reel T

Base Assembly P4

Opener Lid

Arm Assembly Pinch

Arm T/up

Supporter, capstan

Belt Capstan/Motor Capstan

Lever F/R

Clutch Assembly D37

Gear Drive/Gear Cam

Gear Sector

Brake Assembly Capstan

Plate Slider

Lever Tension

Lever Spring

Lever Brake

Gear Assembly P2/

Gear Assembly P3

Base Assembly P2

/Base Assembly P3

Base Loading

Base Tension

Arm Assembly Idler Jog

T:Top, B:Bottom

Part

Ref.

Fixing Type

Draw-

ings 3 screws 2 hooks 6 chasses 1 hook Chassis Hole Chassis Hole Chassis Hole, 1 hook 1 screw 2 hooks Chassis Embossing Chassis Embossing 1 screw 1 hook 1 hook Shaft Chassis Embossing Chassis Embossing Shaft 1 hook Chassis Hole 3 screws Ta b Washer Washer/Hook Hook Chassis Hole

Chassis Guide

1 Hook

Bass

6 Chasses

3 Hooks Chassis Embossing Locking Tab

A-1

A-2

A-3

A-4

A-5

A-6

A-7

A-8

A-9

Posi

tion

T T T T T T

T T T T T T T T T T T

T B B B B B B B

B B B

(1) For assembly, check the assembly mode is accurate. (2) Parts firstly disassembled indicate parts firstly disassembled in disassembly of related parts.

1-10 (No.YD068)

Page 11

4.2 DISASSEMBLY AND ASSEMBLY OF DECK MECHANISM (VCR)

Drum Assembly

Cable Flat

1. Disassembly of Drum Assembly (Figure A-1)

1) Separate cable flat from the Drum FPC and the Capstan Motor.

2) Release 3 screws (S1) on the bottom side of the chassis, and separate the drum assembly.

3) Release the hooks (H1, H2) and separate both the holder FPC and the Cap FPC (disassemble if necessary).

(S1)

Fig. A-1

Cautions in assembly of FPC

Holder FPC

(S1)

Cap, FPC

Holder FPC

Cap FPC

Drum FPC

Assembly shape seen in the reverse direction

(No.YD068)1-11

Page 12

Plate Top

(Fig. A-2-1)

(H4)

(B')

Arm Assembly F/L

(Fig. A-2-5)

Lever Assembly S/W

(Fig. A-2-6)

(B)

(C)

Holder Assembly CST

(Fig. A-2-2)

(E)

1-12 (No.YD068)

Fig. A-2

Gear Assembly Rack F/L

(Fig. A-2-3)

Opener Door

(Fig. A-2-4)

(A)

(H3)

(B)

Page 13

2. Disassembly of Plate Top (Fig. A-2-1)

1) Separate the right part while leaning back the (B) part of the plate top toward the arrow direction.

2) Separate the left part while leaning back the (B f) part of the plate top toward the arrow direction. (Tool used: Tool such as (-) driver, auger, etc with pointed or flat end)

CAUTIONS

Assemble while pressing the (C), (C') part after corresponding them as in drawing.

(C')

(C)

(B')

(B)

3. Holder Assembly CST (Fig. A-2-2)

1) Firstly separate the left part from the groove on the (D) part of chassis while moving the holder assembly CST toward the arrow direction.

Holder Assembly CST

(D)

Chassis

4. Disassembly of Gear Assembly Rack F/L (Fig. A-2-3)

1) Separate the hook (H3) while leaning ahead the hook (3) after moving the gear assembly rack F/L toward the arrow (A) direction.

2) Separate the gear assembly rack F/L toward the arrow (B) direction.

CAUTIONS

For the assembly, correspond the gear part of gear assembly rack F/L to the gear drive.

Gear Rack F/L

Gear Drive

5. Opener Door (Fig. A-2-4)

1) Separate the opener door ahead from the guide hole of chassis while turning it clockwise.

6. Arm Assembly F/L (Fig. A-2-5)

1) Firstly separate the left part of the arm assembly F/L from the groove of chassis while pushing the arm assembly F/L toward the arrow direction.

2) Separate the right part from the groove of chassis.).

2) Separate the right part from each groove of chassis

CAUTIONS

Assemble by inserting the left part after firstly inserting the (E) part of the holder assembly CST into the groove on the (E') part of chassis.

7. Lever Assembly S/W (Fig. A-2-6)

1) Separate the lever assembly S/W while pushing it toward the arrow direction after removing the hook (4) on the left side of chassis.

Chassis

(H4)

(No.YD068)1-13

Page 14

Base Assembly A/C Head

(Fig. A-3-5)

(A)

Arm Assembly Cleaner

(Fig. A-3-3)

(A)

(S5)

(H5)

Gear Wheel

(Fig. A-3-2)

Motor Assembly L/D

(Fig. A-3-1)

Head F/E

(Fig. A-3-4)

(C1)

(S4)

Fig. A-3

8. Motor Assembly L/D (Fig. A-3-1)

1) Take the connector (C1) connected to the Capstan motor PCB out.

2) Remove a screw (S4) of the chassis (S4) and step back ward, and disassemble it while holding it up.

9. Gear Wheel (Fig. A-3-2)

1) Release the hook (H5) of the gear wheel and disassemble it upward.

1-14 (No.YD068)

10. Arm Assembly Cleaner (Fig. A-3-3)

1) Separate the (A) part of Fig. A-3-1 from the embossing of chassis, and hold it up while turning it anti-clockwise.

11. Head F/E (Fig. A-3-4)

1) Separate the (A) part of the head F/E from the embossing of chassis, and hold it up while turning it anti-clockwise.

12. Base Assembly A/C Head (Fig. A-3-5)

1) Release a screw (S5) and disassemble while holding it up.

Page 15

Arm Assembly Tension

(Fig. A-4-2)

Spring Tension

(H7)

Reel T

(Fig. A-4-3)

Reel S

(Fig. A-4-3)

(H8)

Spring Tension

Fig. A-4

Brake Assembly T

(Fig. A-4-1)

(H6)

13. Brake Assembly T (Fig. A-4-1)

1) Release the spring tension from the lever spring hook (H6).

2) Disassemble the brake assembly T while holding it upward.

14. Arm Assembly Tension (Fig. A-4-2)

1) Release the spring tension the hook (H7) from the arm assembly tension.

2) After releasing the hook (H8) of the base tension, separate it while holding it up.

CAUTIONS

Spring used for both brake assembly T and arm assembly tension is used (2EA used).

15. Reel S/Reel T (Fig. A-4-3)

1) Disassemble the reel S/ reel T while holding it up (compa rison between Reel S and Reel T)

Reel S Reel T

(No.YD068)1-15

Page 16

(Fig. A-5-2)

(B)

Opener Lid

Arm Assembly Pinch

(Fig. A-5-3)

(C)

Base Assembly P4

(Fig. A-5-1)

(A)

(C)

(H9)

Arm T/up

(Fig. A-5-4)

Chassis

16. Base Assembly P4 (Fig. A-5-1)

1) Release the (A) part of the base assembly P4 from the embossing of chassis.

2) Hold the base assembly P4 up while turning it anti-clock wise.

17. Opener Lid (Fig. A-5-2)

1) Release the (B) part of the opener lid from the embossing of chassis.

2) Disassemble the opener lid upward while turning it anticlo ckwise.

1-16 (No.YD068)

Fig. A-5

18. Arm Assembly Pinch (Fig. A-5-3)

1) Hold the arm assembly pinch up.

19. Arm T/up (Fig. A-5-4)

1) Turn the arm T/up to release the anchor jaw (H9) part of chassis and then hold it upward.

CAUTIONS

For the assembly, check the (C) part of the arm assembly pinch is assembled as in drawing.

- REVERSE THE MECHANISM.

Page 17

Suppoter Capstan

(Fig. A-6-1)

Motor Capstan

(L1)

Lever F/R

(Fig. A-6-4)

Belt Capstan

(Fig. A-6-2)

(Fig. A-6-3)

Washer(W1)

Clutch Assembly D37

(Fig. A-6-5)

(L1)

(S6)

Fig. A-6

20. Supporter, Capstan (Fig. A-6-1)

1) Turn the supporter and Capstan by 90 deg. clockwise with a driver for disassembly.

21. Belt Capstan (Fig. A-6-2) / Motor Capstan (Fig. A-6-3)

1) Separate the belt Capstan.

2) Undo 3 screws (S6) on the bottom side of chassis and dis assemble it upward.

Chassis

22. Lever F/R (Fig. A-6-4)

1) Release the locking tab (L1) and then disassemble it upward.

23. Clutch Assembly D37 (Fig. A-6-5)

1) Remove the washer (W1) and then disassemble it upward.

(No.YD068)1-17

Page 18

(H10)

(Fig. A-7-2)

(W2)

Gear Cam

Washer (W2)

(H11)

Gear Sector

(Fig. A-7-3)

Gear Cam Hole(B)

Gear Cam Hole(C)

Gear Drive Hole(A)

Gear Drive

(Fig. A-7-1)

Lever Brack

(Fig. A-7-8)

(L2)

Chassis

Brake Assembly Capstan

(Fig. A-7-4)

(Fig. A-7-5)

(Fig. A-7-6)

(B)

(Fig. A-7-7)

3 6

Plate Slider

Lever Tension

Lever spring

Base Loading

Fig. A-7

24. Gear Drive (Fig. A-7-1)/Gear Cam (Fig. A-7-2)

1) Remove the washer (W2) and then disassemble the gear drive.

2) Release the hook (H10) of the gear cam and then disas semble it upward.

CAUTIONS

For the assembly, adjust both the gear driver hole (A) and the gear cam hole (B) straightly and then correspond the gear cam hole (C) to the chassis hole.

25. Gear Sector (Fig. A-7-3)

1) Release the hook (H11) of the gear sector and then hold the gear sector upward.

26. Brake Assembly Capstan (Fig. A-7-4)

1) Release the locking tab (L2) on the bottom side of the plate slider and then disassemble it upward.

27. Plate Slider (Fig. A-7-5)

1) Disassemble the plate slider while holding it up.

28. Lever Tension (Fig. A-7-6)

1) Release the lever tension from the guide (A) of chassis while turning it anti-clockwise.

2) Disassemble the lever tension while holding it up.

29. Lever Spring (Fig. A-7-7)

1) Release the (B) part of the lever spring from the guide (A) of chassis while turning it anti-clockwise.

2) Disassemble the lever tension while holding it up.

30. Lever Brake (Fig. A-7-8)

1) Disassemble the lever brake while holding it up.

1-18 (No.YD068)

Page 19

Gear assembly P2 Hole

Gear assembly P3 Hole

Lever Tension Boss

Gear sector (A)

Plate slider Hole(B)

(H12)

(H14)

Gear Assembly P3

(Fig. A-8-2)

Gear Assembly P2

(Fig. A-8-1)

(H13)

Base Loading

(Fig. A-8-5)

Chassis

Base Assembly P3

(Fig. A-8-4)

31. Gear Assembly P2 (Fig. A-8-1)/ Gear Assembly P3 (Fig. A-8-2)

1) Hold the gear assembly P2 upward.

2) Hold the gear assembly P3 upward.

CAUTIONS

For the assembly, check the holes of both the gear assembly P2 and the P3 are adjusted straightly, and then correspond the gear section groove (A) to the plate slider hole (B).

(B)

(A)

Base Assembly P2

(Fig. A-8-3)

Fig. A-8

32. Base Assembly P2 (Fig. A-8-3)/ Base Assembly P3 (Fig. A-8-4)

1) Disassemble the base assembly P2 downward while mov ing it toward the arrow (A) direction along with the guide hole of chassis.

2) Disassemble the base assembly P2 downward while mov ing it toward the arrow (B) direction along with the guide hole of chassis.

33. Base Loading (Fig. A-8-5)

1) Release 3 hooks (H12, 13, 14) of the base loading, and then disassemble them upward.

- REVERSE THE MECHANISM.

(No.YD068)1-19

Page 20

Base Tension

(Fig. A-9-1)

(A)

Arm Assembly Idler Jog

(Fig. A-9-2)

(B) (C)

(D)

34. Base Tension (Fig. A-9-1)

1) Release the (A) part of the base tension from the embossing of chassis.

2) Hold the base tension upward while turning it anti-clock wise.

Chassis

Fig. A-9

35. Arm assembly Idler Jog (Fig. A-9-2)

1) Push both (B), (C) parts in Fig. A-9-2 toward the arrow direction.

2) Disassemble the arm assembly idler upward.

CAUTIONS

Take care to ensure that the (D) part in the drawing is not hung to chassis in disassembly.

1-20 (No.YD068)

Page 21

4.3 DECK MECHANISM ADJUSTMENT (VCR)

4.3.1 Tools and Fixfures for Service

1. Cassette Torque Meter

1. PUJ42881

300

SRK

VIDEO

CASSETTE

TORQUE

METER

VHT-303

300

5. Post Height Adjusting Driver (Roller driver) PTU94002

2. Alignment Tape NTSC: MHP PAL: MHPE

3. Torque Gauge

3. PUJ48075-2

(No.YD068)1-21

Page 22

4.3.2 Mechanism Assembly Mode Check

Purpose of adjustment : To make tools normally operate by positioning tools accurately.

Fixtures and tools used VCR (VCP) status Checking Position

Blank Tape (empty tape)

Eject Mode (with cassette withdrawn)

1) Turn the VCR on and take the tape out by pressing the eject button.

2) Separate both top cover and plate top, and check both the hole (A) of gear cam and the hole (A') of chassis co rrespond (Fig. C-2).

3) If it is done as in the paragraph 2): Turn the gear cam as in No.2) after mantling the motor assembly L/D.

CHECK DIAGRAM

Mechanism and Mode Switch

4) Undo the screw fixing the deck and the main frame, and separate the deck assembly. Check both the hole (A) of gear cam and the hole (A') of chassis correspond (Fig. C-1).

5) Check the mode S/W on the main P.C. board locates at a proper position as in (B) of the Fig. (C-1).

6) Connect the deck to the main P.C. board and perform all types of test.

Gear Cam

(C)

Gear Drive

(B)

Mode S/W

BOTTOM VIEW

TOP VIEW

Fig. C-1

Fig. C-2

Correspondence of the gear cam hole (O)

and the gear drive hole (O)

Motor Assembly L/D

Gear Cam

(A')

(A)

Chassis Hole

Gear Cam Hole

1-22 (No.YD068)

Page 23

4.3.3 Previous Preparation for Deck Adjustment

(Preparation to load the VCR (VCP) with cassette tape not inserted) (1) Take the power cord from the consent. (2) Separate the top cover and the plate assembly top. (3) Insert the power cord into again. (4) Turn the VCR (VCP) on and load the cassette while push-

ing the lever stopper of the holder assembly CST back-

If doing so, proceeding to the stop mode is done. In this status, input signals of all modes can be received. However, operation of the Rewind and the Review is impossible since the take-up reel remains at stop status and so cannot detect the reel pulse

(however, possible for several seconds). ward. In this case, clog both holes on the housing rail part of chassis to prevent detection of the end sensor.

4.3.4 Torque Measuring

Purpose of Measuring : To measure and check the reel torque on the take-up part and the supply part that performs basic operation of the VCR (VCP) for smoothly forwarding the tape. Measure and check followings when the tape is not smoothly wound or the tape velocity is abnormally proceeded:

VCR (VCP) status Measuring methodFixtures and tools used

Torque Gauge (600 g.cm ATG) Torque Gauge Adaptor Cassette Torque Meter

Play (FF) or Review (REW) Mode

Try to operate the VCR (VCP) per mode with the tape not inserted (See 4.3.3 Prior Preparation for Deck Adjustment). Measure after adhering and fixing the torque gauge adaptor to the torque gauge (Fig. C-3-1) Read scale of the supply or take-up part of the cassette torque meter (Fig. C-3-2).

Item

Fast forward Torque

Rewind Torque

Play Take-Up Torque

Review Torque

Fast Forward

Rewind

Play

Review

Mode Instruments Reel Measured Measuring Value

Torque Gauge

Cassette Torque Meter

Take-Up Reel

Supply Reel

Take-Up Reel

Supply Reel

NOTE

Adhere the torque gauge adaptor to the torque gauge for measuring the value.

Cassette Torque MeterTorque Gauge (600g.cm ATG)

Torque Gauge

Torque Gauge Adaptor

More than 400g cm

40~100g cm

40~210g cm

300

250

200

150

SRK

VIDEO

CASSETTE

TORQUE

METER

VHT-303

150

200

250

300

Reel Table

Fig. C-3-2Fig. C-3-1

(No.YD068)1-23

Page 24

4.3.5 Guide Roller Height Adjustment

Purpose of adjustment : To ensure that the bottom surface of the tape can travel along with the tape lead line of the lower drum by constantly and adjusting and maintaining the height of the tape.

4.3.5.1 Prior Adjustment

Fixtures and tools used VCR (VCP) status Adjustment position

Post Height Adjusting Driver

Play or Review Mode

Adjustment Procedure

1) Travel the tape and check the bottom surface of the tape travels along with the guide line of the lower drum.

2) If the tape travels toward the lower part of guide line on the lower drum, turn the guide roller height adjusting screw to the left

3) If it travels to the upper part, turn it to the right.

4) Adjust the height of the guide roller to ensure that the tape is guided on the guide line of the lower drum at the inlet/outlet of the drum. (Fig. C-4-1)

4.3.5.2 Fine Adjustment

Fixtures and tools used

Oscilloscope Alignment tape Post height adjusting driver

Measuring tools and connection position

CH-1: PB RF Envelope CH-2: NTSC : SW 30Hz PAL : SW 25Hz Head switching output point RF Envelope output point

The guide roller height adjusting screw on the supply guide roller and the take-up guide roller

ADJUSTMENT DIAGRAM

Fig. C-4-1

GUIDE ROLLER HEIGHT ADJUSTMENT SCREW

VCR (VCP) status Adjustment position

Play the standard test tape.

Guide roller height adjusting screw

Waveform

P2 POST ADJUSTMENT

1) Play the Alignment tape after connecting the probe of oscilloscope to the RF envelope output point and the head switching output point.

2) Tracking control (playback) : Locate it at the center (Set the RF output to the maximum value via the tracking control when such adjustment is completed after the drum assembly is replaced.)

3) Height adjusting screw: Flatten the RF waveform. (Fig. C-4-2)

4) Move the tracking control (playback) to the right/left. (Fig. C-4-3)

5) Check the start and the end of the RF output reduction width are constant.

CAUTIONS

There must exist no crumpling and folding of the tape due to excess adjustment or insufficient adjustment.

P3 POST ADJUSTMENT

Fig. C-4-2

When the tracking control locates at the center.

Fig. C-4-2

Connection Diagram

RF ENVELOPE OUTPUT POINT

HEAD RF SWITCHING OUTPUT POINT

Flatten the waveform by lightly turning the guide roller height adjustment screw.

When turning the tracking control to both sides.

OSCILLOSCOPE

CH-1 CH-2

1-24 (No.YD068)

Page 25

4.3.6 Audio/Control (A/C) Head Adjustment

Purpose of adjustment : To ensure that audio and control signals can be recorded and played according to the contract tract by constantly maintaining distance between tape and head, and tape tension between the P3 post and the P4 post.

4.3.6.1 Prior Adjustment (performed only when no audio output appears in play of the standard test tape)

Fixtures and tools used VCR (VCP) status Adjustment position

Blank Tape Driver (+) Type 5mm

Play the blank tape

Adjustment Procedure/Adjustment Diagrams

1) Basically use the A/C head assembly adjusted as in SPEC.

2) Check there is crumpling and folding of the tape around the A/C head. If it is, Turn and adjust the tilt adjusting screw to ensure that the tape corresponds to the bottom guide of the P4, and recheck the tape path after proceed ing play for 4-5 seconds.

8.3

A/C Head Base

Tilt adjusting screw (C) Height adjusting screw (B) Azimuth adjusting screw (A)

3) Where the tape bottom is not equal to Fig. C-5-3, Adjust the height by using the height adjusting screw (B) and then readjust it by using the tilt adjusting screw (C).

CAUTIONS

Always check the height of the A/C head since most ideal height of A/C head can be obtained when the bottom part of the tape is away 0.2 ~ 0.25mm from the bottom part of the A/C head.

A/C Head

Tape

0.2~0.25mm

Tape

Azimuth Adjustment Screw(A)

Fig. C-5-1

X-Value Adjustment Hole

Fixed Screw

A/C Head Assembly

Fig. C-5-2

Fig. C-5-3

Tilt Adjustment

Screw(C)

Height Adjustment

Screw(B)

(No.YD068)1-25

Page 26

4.3.6.2 Tape Path Check between Pinch Roller and Take up Guide (Check in the Rev Mode)

1) Check the tape pass status between the pinch roller and the take-up guide.(Check there is crumpling of the tape pass and folding of the take-up guide.)

(1) When holding of the take-up guide bottom occurs

Turn the tilt adjusting screw (C) clockwise and travel it stably to ensure there is no crumbling or folding of the tape.

(2) When holding of the take-up guide top occurs

Turn the tilt adjusting screw (C) anti-clockwise and travel it stably to ensure there is no crumbling or folding of the tape.

4.3.6.3 Fine Adjustment (Azimuth Adjustment)

2) Check there is folding of the tape at the bottom or top of the take-up guide in cutting-off the REV mode

CAUTIONS

If the RF waveform is changed after adjusting the A/C head, perform fine adjustment to ensure the RF waveform is flatened.

Fixtures and tools used Connection position VCR (VCP) status Adjustment position

Oscilloscope Standard test tape (only for SP) Driver (+) Type 4mm

Adjustment Procedure

1) Connect the probe of Oscilloscope to the audio output jack.

2) Ensure that Audio 1KHz, 7KHz output is flattened at the maximization point by adjusting the Azimuth adjusting screw (A).

4.3.7 X-Value Adjustment

Audio Output Jack Play the Alignment tape

1KHz, 7KHz.

1KHz

A: Maximum

Fig. C-5-4

Azimuth Adjusting Screw (A) Height Adjusting Screw (B)

B: Minimum

Purpose of adjustment : To maintain compatibility with other VCR (VCP).

Fixtures and tools used Connection position VCR (VCP) status Adjustment position

Oscilloscope Standard test tape (only for SP) Driver (+) Type 4mm

CH-1: PB RF Envelope CH-2: NTSC ; SW 30Hz PAL:SW 25Hz Head switching output point RF Envelope output point

Play the Alignment tape

Left

Grove of Base A/C

Right

7KHz

Adjustment Procedure

1) After releasing the auto tracking, lightly turn the fixing screw. Turn the (+) type driver on the X-dis-tance adju sting hole to the right or left. Adjust the RF envelope level to the maximum point and then fix the fixing screws.

2) For the 31 m head, adjust it with the SP tape recorded in the width of 31 m since the head travels on the tape track only for SP with the width of 58 m.

1-26 (No.YD068)

Connection Diagram

X-value Adjusting Hole

Fixing Screw

Azimuth

Adjustment

Screw(A)

Fig. C-6

RF ENVELOPE OUTPUT POINT

HEAD RF SWITCHING OUTPUT POINT

Tilt Adjusting Screw (C)

Height Adjusting Screw (B)

OSCILLOSCOPE

CH-2CH-1

Page 27

4.3.8 Adjustment after Drum Assembly (Video Heads)

Purpose of adjustment : To adjust and stabilize the height change, X-distance change, etc depending on the guide roller after assembling the drum.

Fixtures and tools used Connection position VCR (VCP) status Adjustment position

Oscilloscope Alignment tape (only for SP) Post Height Adjusting Driver Driver (+) Type 5mm

CH-1: PB RF Envelope CH-2: NTSC : SW 30Hz PAL:SW 25Hz Head switching output point RF Envelope output point

Checking/Adjustment Procedure

1) Play the blank tape and check whether the guide roller crumbles or wrinkles the tape and adjust it if necessary.

2) Check that the RF envelope output waveform is flat, and adjust the height of the guide roller while playing the alignment tape.

3) Adjust the switching point.

4) Check the RF envelope output is the maximum when the tracking control locates at the center. If not maximum, set up to ensure that RF envelope output becomes the maximum by turning the (+) type driver on the base A/C groove.

4.3.9 Check of Traveling Device after Deck Assembly

4.3.9.1 Audio, RF Normalization Time (Locking Time) Check in Play after CUE or REV

Play the blank tape. Play the Alignment tape.

Connection Diagram

RF ENVELOPE OUTPUT POINT

HEAD RF SWITCHING OUTPUT POINT

Waveform

V1/V MAX = 0.7 V1/V MAX = 0.8 RF ENVELOPE OUTPUT

Fine adjustment of guide roller Switching Point Tracking Preset X-value

OSCILLOSCOPE

CH-2CH-1

V2V1V1

Fixtures and tools used Measuring standard Connection position VCR (VCP) status

Oscilloscope Alignment tape (Colour bar) Stop Watch

RF Locking Time: Within 5 seconds Audio Locking Time : Within 10 seconds

CH-1: PB RF Envelope CH-2: Audio output RF Envelope output point

Play the Alignment tape (Colour bar)

Audio output jack

Checking Procedure

1) Check that locking time of the RF and Audio waveform is fallen within the measuring standard in conversion of the play mode from the CUE or the REV mode.

4.3.9.2 Check of Tape Curl and Jam Status

2) Readjust the paragraph 4.3.6 and 4.3.7 if it deviates from the standard.

Fixtures and tools used Fixtures and tools used Fixtures and tools used

E-240 Tape E-160 Tape

Checking Procedure

1) Check there is no abnormality of every traveling post status.

2) There must be no abnormal operation of the counter in

There must be no jam or curl at the first, middle and end position of tape.

occurrence of folding of the bottom tape. There must be not abnormality of audio signal in damage of the top tape.

3) If there is abnormality, readjust the adjustment paragraph

4.3.5 and 4.3.6.

Travel the tape at the position of its first and end.

(No.YD068)1-27

Page 28

4.4 PROTECTION, MAINTENANCE AND CHECK OF VIDEO FUNCTION (VCR)

4.4.1 Checking Points prior to Repair

Following abnormal phenomena may be repaired by removal of foreign materials and oil supply. Check oiling is required at the checking set or cleaning status is complete.

Determine that necessity of checking and repair the set exists after checking the using period of the set together with the user. In this case, followings must be checked:

Phenomena

Color beat Pollution of Full-Erase Head o

S/N, Color Faded Pollution of Video Head o

Horizontal, Vertical Jitte o

Poor Sound, Low Sound o

No tape wound or tape wound loosely. FF or REW impossible, or slow turning

Tape loosely wound in REV or Unloading

Checking Points and Cause

Pollution of Video Head or Tape Transport System

Pollution of Audio/Control Head

Pollution of Pinch Roller or Belt Capstan Belt

Deterioration of Clutch Assembly D37 Torque

Pollution of Drum and Traveling Device

Replace-

ment

Fig. C-9-3

CAUTIONS

If operation of the position with (O) mark is abnormal even after removing cause, replace it with substitute product since it shows damage or wearing.

F/E Head

Video Head

Fig. C-9-1 TOP VIEW

A/C Head

Pinch Roller

Belt Capston

Clutch

Assembly A37

Fig. C-9-2 BOTTOM VIEW

* No. (1) ~ (12) shows sequence that the tape moves from the supply reel to the take-up reel.)

(3) F/E Head

(5) Drum Assembly

(Video Head)

(4) Base Assembly P2

(2) Tension Post

(1) Supply Reel

Fig. C-9-3 Tape Transport System

1-28 (No.YD068)

(6) Base Assembly P3

(7) A/C Head

(8) P4 Post

(10) Pinch Roller

(11) Take-up Guide Post

(9) Capstan Shaft

(12) Take-up Reel

Page 29

4.4.2 Essential Check and Repair

Recording density of the video is far higher than the audio. Therefore video parts are very precise so as to allow only error of 1/1000mm or so in order to maintain compatibility with other videos. If one of these parts is polluted or old, same phenomena will appear as they are damaged. To maintain clear screen, regular check, replacement of old and damaged parts and oil supply, etc are essential.

4.4.3 Regular Check and Repair

Check and repair schedule is not constant since they vary depending on method that the consumer uses video and environment where the video is installed at. However, for the video used by common household, good screen will be maintained if regular check and repair per 1,000 hour is performed. The following chart shows relationship between using time and checking time:

Time

Requiring

Checking

Average hours used per day

One hour

Two hours

Three hours

About 1 year

About

18 months

About

3 years

4.4.4 Tools for Check and Repair

(1) Grease: Floil G-3114 (KANTO) or equivalent grease

(Green) (2) Grease: Kanto G-754, PL-433 (Yellow) (3) Alcohol (Isopropyl Alcohol) (4) Cleaning Patch (cloth)

4.4.5 Maintenance Process

4.4.5.1 Removal of Foreign Material

(1) Removal of foreign material from video head (Fig. C-9-4)

Firstly try to use a cleaning tape.

Use a cleaning patch if foreign materials are not removed

with the cleaning tape due to severe dirty of the head.

Soak the cleaning patch in alcohol and put it to the head tip.

Smoothly turn the drum (turning cylinder) to the right or left

(In this case, the cleaning patch must not be moved verti-

cally).

After completely drying the head, test the traveling status

of the tape.

If alcohol (Isopropyl Alcohol) remains at the video head, the

tape may be damaged when this solution touches with the

head surface.

Never use a cloth bar (commercial sale)

(2) Wipe the tape transport system and the drive system with

the cleaning patch soaked in alcohol (Isopropyl Alcohol)

when removing foreign materials from them.

1) The part touched with the traveling tape is called as tape transport system. The drive system consists of parts to travel the tape.

2) Care must be exercised so that unreasonable force to change the pattern will be applied to the tape transport system during removal of foreign materials.

Cleaning Patch

(Cloth)

Soak alcohol (Isopropyl Alcohol).

Drum (Turning Cylinder)

Head Tip

Smoothly turn the drum (turning cylinder) touching the soft surface to the head tip surface.

Fig. C-9-4

(No.YD068)1-29

Page 30

4.4.5.2 Grease Applications

(1) Grease Application Method

Apply grease by using a cloth swab or brush. Care must be exercised so that excess quantity should not be used. If the excessive quantity is applied, wipe it with the gauze soaked in alcohol (Isopropyl Alcohol).

(1) Inner Side Surface and Top Surface of Loading Path (2) Stable Adhesion Part of Base P2, P3 (3) Arm Pinch Shaft

(4) Gear Wheel Shaft (5) Reel S. T. Shaft (1) (2) (3) (4): KG-684G (Green) (5): PL-433 (Yellow)

(2) Regular Grease Application

Apply grease to the designated application position every 500 hour.

NOTE: POSITION OF GREASE APPLICATION

(1) Inner Side Surface and Top Surface of Loading Path (2) Stable Adhesion Part of Base P2, P3 Coil (3) Gear Cam Shaft (4) Gear Drive Shaft (5) Clutch Shaft Groove

Guide Part on the Plate Slider

(6) Side Wall (Left) (7)

Guide Part on the Plate Slider Side Wall (Right) (1) (2) (3) (4) (5) (6) (7): KG 684G (Green)

Gear Part

Chassis (TOP)

Cam Part (PL-433.Yellow)

Gear Part (PL-433.Yellow)

Gear Sector Gear Cam

Base Loading Gear Drive

Cam Part Side Application (KG-684G.Green)

Boss Part Side Wall (PL-433.Yellow)

Gear Part Side Application (PL-433.Yellow)

Chassis (Bottom)

Cam Part

(KG-684G , GREEN)

Cam Part (KG-684G , GREEN)

Gear Rack F/L

1-30 (No.YD068)

Inner Surface of

Guide Rail

(KG-684G.Green)

Chassis (L) Chassis (R)

Lever, Brake Driving Cam Part

Side Wall Guide Part

Lever F/R Driving Part

Plate Slider

Lever Tension Driving Cam Part

Gear Sector Driving Part

Lever, Spring Driving Part

Side Wall Guide Part

Page 31

Lever, F/R, Base, Tension GEAR AY, P2 & P3

LEVER, F/R

Clutch Contact Part (PL-433, Yellow)

Tension Arm Party Hinge Part (PL-433, Yellow)

BASE, TENSION

PL-433

(No.YD068)1-31

Page 32

4.5 ELECTRICAL ADJUSTMENT PROCEDURES (VCR)

4.5.1 Servo Adjustment

1) PG Adjustment Test Equipment

a) OSCILLOSCOPE

b) Alignment tape (SP, stairstep)

Adjustment And Specification

MODE MEASUREMENT POINT ADJUSTMENT POINT SPECIFICATION

PLAY

V.Ou t

H/SW(TP)

R/C TRK JIG KEY 6.5 0.5H

Adjustment Procedure

a) Insert the Alignment Tape and play. Note - Adjust the distance of X, pressing the Tracking(+) or Tracking(-) when the "ATR" is blink after the Alignment Tape is inserted. b) Connect the CH1 of the oscilloscope to the H/SW(TP) and CH2 to the Video Out for the VCR. c) Trigger the mixed Combo Video Signal of CH2 to the CH1 H/SW(TP) and then check the distance (time difference), which is from the selected A(B) Head point of the H/SW(TP) signal to the starting point of the vertical synchronized signal, to 6.5H 0.5H (412 s, 1H=63 s).

PG Adjustment Method

a-1) Playback the Alignment tape b-2) Press the "OK(ENTER)" key on the Remote controller and the "REC" key on the Front Panel the same time, then it goes in to Tracking initial mode. c-3) Repeat the above step(No.b-2), then it finishes the PG adjusting automatically. d-4) Stop the playback, then it goes out to PG adjusting mode after mony the PG data.

CONNECTION

WAVEFORM

H/SW

(TP)

V.Out

OSCILLOSCOPE

CH1 CH2

R/C KEY

V.outH/SW

(TP)

H/SW

6.5H(412 s)

Composite

VIDEO

1-32 (No.YD068)

Page 33

4.6 DECK MECHANISM PARTS LOCATION (DVD)

Top View (With Tray)

Top View (Withou

t Tray)

Procedure

Starting No.

Main Base

Clamp Assembly

1, 2

1, 2, 3

1, 2, 3, 4

1, 6

1, 2, 6

1, 2, 6, 8

1, 2, 6, 8, 9

1, 2, 7

1, 2

1, 2 ,13

1, 2, 13, 14

1, 2, 7, 12, 13, 14

1, 2, 13

1, 2, 7, 12, 13,

14, 15, 16, 17

Disc

Plate Clamp

Magnet Clamp

Clamp Upper

Tray Disc

Base Assembly Sled

Gear Feed

Gear

Middle

Gear Rack

Rubber Rear

Frame Assembly

Up/Down

Belt Loading

Gear Pulley

Gear Loading

Guide Up/Down

PWB Assembly

Base Main

Parts Fixing Type

4 Screws,

1 Connector

1 Locking Tabs

1 Screw

1 Locking Tab

1 Hook

2Screw

2 Locking Tabs

Disass embly

Bottom

Figure

5-1

5-2

5-3

5-4

Bottom View

Note

When reassembling, perform the procedure in reverse order.

The "Bottom" on Disassembly column of above Table indicates the part should be disassembled at the Bottom side.

(No.YD068)1-33

Page 34

PLATE CLAMP

MAGNET CLAMP

CLAMP UPPER

MAIN BASE

DISC CLAMP ASSEMBLY

TRAY DISC

HOLDER

(Fig. A)

BASE MAIN

1.Main Base (Fig. 5-1) 1-1. Clamp Assembly Disc

1) Place the Clamp Assembly Disc as Fig. (A)

2) Lift up the Clamp Assembly Disc in direction of arrow(A).

3) Separate the Clamp Assembly Disc from the Holder Clamp.

1-1-1. Plate Clamp

1) Turn the Plate Clamp to counterclockwise direction and then lift up the Plate Clamp.

1-1-2. Magnet Clamp 1-1-3.Clamp Upper

BASE MAIN

LEVER

BASE MAIN

BOTTOM SIDE VIEW

Fig. 5-2Fig. 5-1

2. Tray Disc (Fig. 5-2)

1) Insert and push a Driver in the emergency eject hole(A) at the right side, or put the Driver on the Lever(B) of the Gear Emergency and pull the Lever(B) in direction of arrow so that the Tray Disc is ejected about 15~20mm.

2) Pull the Tray Disc until it is separated from the Base Main completely.

1-34 (No.YD068)

Page 35

GEAR RACK

RUBBER DAMPER

(S3)

PINION GEAR

MIDDLE GEAR

SCREW INSERTION TORGUE CONTROL

(800gf DOWN)

RUBBER DAMPER

Distinguish upper and lower sides (Assemble with care)

RUBBER DAMPER

Distinguish upper and lower sides (Assemble with care)

BASE PU

GEAR RACK

SPINDLE MOTOR ASSEMBLY

3.Base Assembly Sled (Fig. 5-3)

1) Release 4 Screw(S2).

2) Disconnect the FFC Connector(C1)

3-1. Gear Feed 3-2. Gear Middle

RUBBER DAMPER

GENERAL PICK UP ASSEMBLY

Fig. 5-3

(S2)

3-3. Gear Rack

1) Release the Scerw(S3)

4. Rubber Rear (Fig. 5-3)

(S2)

(No.YD068)1-35

Page 36

GUIDE UP/DOWN

GEAR PULLEY

SCREW INSERTION TORGUE CONTROL

(800gf DOWN)

GUIDE UP/DOWN

GEAR LOADING

(L4)

BELT LOADING

BASE MAIN

(A)

(L5)

FIG. (A)

(B)

PWB ASSEMBLY LOADING

(A)

(B)

(C)

(C2)

(S5)

(A)

(B)

GUIDE UP/DOWN

(L3)

(L6)

BASE MAIN

(H1)

(S4)

UP/DOWN FRAME ASSEMBLY

FIG. (B)

GUIDE UP/DOWN

FIG. (C)

5. Frame Assembly Up/Down (Fig. 5-4) Note

Put the Base Main face down(Bottom Side)

1) Release the screw(S4)

2) Unlock the Locking Tab(L3) in direction of arrow and then lift up the Frame Assembly Up/Down to separate it from the Base Main.

Note

When reassembling move the Guide Up/Down in direction of arrow(C) until it is positioned as Fig.(C). When reassembling insert (A) portion of the Frame Assembly Up/Down in the (B) portion of the Guide Up/Down as Fig.(B)

6. Belt Loading(Fig. 5-4) Note

Put the Base Main on original position(Top Side)

7. Gear pulley (Fig. 5-4)

1) Unlock the Locking Tab(L4) in direction of arrow(B) and

then separate the Gear Pulley from the Base Main.

Fig. 5-4

8. Gear Loading (Fig. 5-4)

9. Guide Up/Down (Fig. 5-4)

1) Move the Guide Up/Down in direction of arrow(A) as Fig.(A)

2) Push the Locking Tab(L5) down and then lift up the Guide Up/Down to separate it from the Base Main.

Note

When reassembling place the Guide Up/Down as Fig.(C) and move it in direction arrow(B) until it is locked by the Locking Tab(L5). And confirm the Guide Up/Down as Fig.(A)

10. PWB Assembly Loading (Fig. 5-4) Note

Put the Base Main face down(Bottom Side)

1) Release 1 Screws(S5)

2) Unlock the Loading Motor (C2) from the Hook (H1) on the Base Main.

3) Unlock 2 Locking Tabs(L6) and separate the PWB Assembly Loading from the Base Main.

11. Base Main(Fig. 5-4)

1-36 (No.YD068)

Page 37

SECTION 5

TROUBLESHOOTING

5.1 ELECTRICAL TROUBLESHOOTING GUIDE (VCR PART)

5.1.1 Power(SMPS) CIRCUIT

(1) No 5.3VA

No 5.3VA

YES

Is the FR101 Normal?

YES

Is the BD101 Normal?

YES

Is the R101 Normal?

YES

Is Vcc (9V - 18V) supplied to IC101 Pin2?

YES

Are the D125 normal?

Is there about 2.5V at the IC103 Pin1?

YES

Replace the FR101 (Use the same ICW)

Replace the BD101

Replace the R101

Is the D102 normal?

Replace the R125

Replace the IC103

Check or Replace the D102

Is the D123 normal?

YES

Is the D124 Normal?

YES

Is the D121 Normal?

YES

Power Line of Main PCB is short

Replace the D123

Replace the D124

Replace the D121

(No.YD068)1-37

Page 38

(2) No 5.0V_D

(3) No 5.0V_T

No 5.0V_D

YES

Is the Vcc(5.3V) supplied to Q165 Emittor?

YES

Is the Q162 Base 'H'?

YES

Check or Replace the Q165

(4) No 3.3V

No 3.3V

YES

Check or Replace the D125

Check the PWR CTL "H" signal from -com

No 5.0V_T

YES

Is the Vcc(5.3V) supplied to Q163 Emittor?

YES

Is the Q162 Base 'H'?

YES

Check or Replace the Q163

(5) No 33V

No 33V

YES

Check or Replace the D125

Check the PWR CTL "H" signal from -com

Is there about 3.8V at the IC131 pin1?

YES

Is there about 3.3V~5V at the IC131 pin4?

YES

Check the IC131 and Replace

Check or Replace the D123

Check the PWR CTL "H" signal from -com

Is the Vcc(33V) supplied to Q161 Emittor?

YES

Is the Q162 Base 'H'?

YES

Check or Replace the Q161

Check or Replace the D121

Check the PWR CTL "H" signal from -com

1-38 (No.YD068)

Page 39

(6) No Motor_Vcc (To Cap, Drum Motor )

(7) No REG 12V

No Motor_Vcc

YES

Is the Vcc(14V) supplied to C134?

YES

Check or Replace the Cap / Drum

Check or Replace the D124

No REG 12V

YES

Is the Vcc(14V) supplied

to Q165 Collector?

YES

Is the Vcc(14V) sup-

plied to Q165 Base?

YES

Check or Replace the Q165

Check or Replace the D124

Check the PWR CTL "H" signal from -com

(No.YD068)1-39

Page 40

5.1.2 SYSTEM/KEY CIRCUIT

(1) AUTO STOP

Auto Stop

YES

Does the SW25 waveform appear at the IC501 Pin23?

Check the Drum Motor signal.

YES

Do the T-UP Reel Pulses

NO NO

appear at the IC501 Pin3?

YES

Replace the IC501. Check the Power Circuit.

Do T/UP Reel Pulses appear at the Q514 Base terminal?

YES YES

Replace the T/UP Reel Sensor (RS501).

Does 5.0V appear at the RS501?

(2) The unstable loading of a Cassette tape

The unstable loading of a Cassette tape

YES

Is 12V applied to the PMC01 Pin8?

Check the Power.

YES

Does the "H" signal appear at the IC501 Pin32 during

inserting the CST ?

YES YES

Does the "L" signal appear at the IC501 Pin19 during inserting the CST?

YES

Check the CST SW and the peripheral circuitry.

Check the Deck Mechanism.

Caution : Auto stop can occur because Grease or Oil is dried up

Is 5.0V applied to the R544 ?

Refer to SMPS 5.3VA troubleshooting.

Check the IC501 Pins 86, 87, 88, 89.

1-40 (No.YD068)

Page 41

5.1.3 SERVO CIRCUIT

(1) Unstable Video in PB MODE

Unstable Video in PB Mode.

YES

Does the Noise level of the screen change periodically?

YES

Does the CFG waveform appear at the IC501 Pin67?

YES

On tracking do the CTL pulses move?

YES

Does the Video Envelope waveform appear at the IC501 Pin82?

YES

Replace the IC501.

(2) When the Drum Motor doesn't run.

When the Drum Motor doesn't run,

YES

Does 12V appear at the PMC01 Pin8?

YES

Does 2.8V appear at the PMC01 Pin12?

YES

Check the connector (PMC01) and the Drum Motor Ass'y.

Replace the IC501.

Refer to "When the Y signal doesn't appear on the screen in PB Mode".

Refer to "(2) No 12VA of Power section"

Do the Drum PWM Pulses appear at the IC501 Pin34?

YES

Aren't the foil patterns and the Components between IC501 Pin34 and PMC01 Pin12 short?

YES

Do the DFG Pulses appear at the IC501 Pin104?

YES

Do the Drum PWM Pulses appear at the IC501 Pin34?

Do the DFG Pulses appear at the PMC01 Pin11?

YES

Replace the Cap M.

Aren't the foil patterns and the Components between IC501 Pin 104 and PMC01 Pin11 short?

Replace the IC501.

Aren't the connecting patterns and the Components between IC501 Pin34 and PMC01 Pin12 short?

(No.YD068)1-41

Page 42

(3) When the Capstan Motor doesn't run,

When the Capstan Motor doesn't run,

Does 12VA appear at the PMC01?

YES

Does 2.8V appear at the PMC01?

YES

Check the PMC01 and the Capstan Motor Ass'y.

Aren't the foil patterns and Components between IC501 Pin33 and PMC01 Pin9 short?

Does the CFG signal come into the IC501 Pin67?

YES

Refer to "SMPS(CAPSTAN/12Volt) Trouble Shooting".

Does the PWM signal appear at the IC501 Pin33?

Does the CFG signal appear at the PMC01 Pin1?

Check the Capstan Motor Ass'y.

YES

Does the Capstan PWM signal appear at the IC501 Pin33?

YES

Aren't the foil patterns and Components between IC501 Pin33 and PMC01 Pin9 short?

(4) KEY doesn't working

KEY doesn't working.

Is 5V applied to the IC501

Pin36?

YES

Does LED or FLD change when a function button is

pressed?

Aren't the foil patterns and component between IC501 Pin67 and PMC01 Pin1 short?

Replace the IC501.

Refer to "SMPS 5.3VA Trouble Shooting".

Replace the defective switches.

1-42 (No.YD068)

Page 43

5.1.4 Y/C CIRCUIT

(1) No Video in EE Mode,

No Video in EE Mode

Does the Video signal appear at the IC301 Pin48?

YES

Is 5V applied to the IC301 Pins18, 24, 42, 55, 72, 91?

YES

Does the Video signal appear at the IC301 Pin65?

YES

Does the Video signal appear at the IC501 Pin47?

YES

Does the Video signal appear at the Emitter terminal of the Q309?

Check the 19Pin of Tuner.

Check the 5.0VT, 5.3VA Line. (Power Circuit)

NO NO

Is I2C BUS signal applied to the IC301 Pins68, 69?

YES

Chck the path of the signal between the IC301 Pin65 and IC501 Pin49.

Does the 12VT, 5.3VA appear at the Emitter

terminal of the Q309.

YES

Check the System Circuit. (Refer to 'SYSTEM I

C BUS

CHECK Trouble Shooting')

Check C316. (AGC)

YES

Replace the IC301.

Replace the Q309.

Check the 12VT, 5.4VA Line. (Power Circuit)

(No.YD068)1-43

Page 44

(2) When the Y(Luminance) signal doesn't appear on the screen in PB Mode,

Is 5.0VT, 5.3VA applied to the IC301 Pins24, 42, 55, 72, 91?

YES

Is the I2C Bus siganl applied to the IC301 Pins68, 69 ?

YES

Is the I2C Bus siganl applied to the IC301 Pins68, 69 ?

YES

Check the line of the 5.0VT,

5.3VA Line. (Power Circuit)

Refer to 'SYSTEM I

C BUS

CHECK Trouble Shooting'.

NO NO

Is the V.H.S/W signal applied to the IC301 Pin70?

YES

Is V.H.S/W "H" about 3.4V

at the IC301 Pin70?

YES

Clean the Drum.

Check the System Circuit. (IC501 Pin23)

Check the V.H.S/W level. (Check R303, R304)

Replace the IC301.

Does the Y(Luminance) RF signal appear at the IC301 Pin79?

YES

Is the Y(Luminance) Video waveform showed up at theIC301 Pin43?

YES

Replace the IC301.

Check the path of the Y(Luminance) RF signal. (Check the C312)

Check the path of the Y(Luminance) RF signal. (Check C327)

YES

1-44 (No.YD068)

Page 45

(3) When the C(Color) signal doesn't appear on the screen in PB Mode,

Is 5.0VT/5.3VA applied to the IC301 Pins24, 42, 55, 72, 91.

YES

Is the Color Rotary signal applied to the IC301 Pin70?

YES

Is Color Rotary "H" about 3.4V?

YES

Does the Color signal appear at the IC301 Pin25 ?

YES

Check the line of the 5.0VT/

5.3VA Line. (Power Circuit)

Check the Color Rotary Circuit. (IC501 Pin98 )

Check the Color Rotary level. (Check the R303)

NO NO

Does the X301(4.43MHZ) oscillate?

Does the Color signal

appear at the IC301 Pin21?

Replace the X301.

Check the Color Pass.

YES

Replace the IC301.Replace the IC301.

(No.YD068)1-45

Page 46

(4) When the Video signal doesn't appear on the screen in REC Mode,

Is the EE signal normal?

YES

Is 5.0VT/5.3VA applied to the IC301 Pins24,42,55,72,91?

YES

Does PB Mdoe operate normally?

YES

Does the RF signal appear at the IC301 Pin78?

YES

Check EE Mode.

Check the line of the 5.0VT/

5.3VA Line.(Power Circuit)

Check PB Mode.

Is the REC 'H' signal (about 4V) applied to the IC301 Pin80?

YES

Check REC Luminance Pass & Color Pass.

YES

Check the System of REC 'H'. (the IC501 Pin27 / the D301)

Replace the IC301.

Does the REC RF signal appear at the IC301 Pins88,89,94,95?

YES

Check the Drum & Drum Connector

Check the circuit of the IC301 Pins85, 86.

YES

1-46 (No.YD068)

Page 47

5.1.5 Hi-Fi CIRCUIT

(A) No Sound(EE Mode)

YES

No Sound.

Check the TU Audio of IC801 Pins2, 3.

Check the DVD Audio of IC801 Pins4, 5.

Check the AV1 Audio of IC801 Pins6, 7.

Check the AV2 Audio of IC801 Pins8, 9.

Check the AV3 Audio of IC801 Pins10, 11.

Check the Vcc of IC801 Pins34, 40, IC802 Pin13.

YES

Check the IC751 Pins30, 31.

Check the DVD Audio OUT. (JK902 DVD_A_L_L/R).

Check the Scart1 Jack. (SC901 Scart1 Audio in Pins2, 6).

Check the Scart2 Jack. (SC901 Scart2 Audio in Pins2, 6).

Check the front Jack.

Check the Power 5.0V, 12VT.

YES

Check the IIC Clock and DATA at IC801 Pins42, 43.

YES

Check the JK902, SC901.

Check the IC501 Pins17, 18.

Replace IC801.Check the Audio of IC801 Pins16, 17.

Replace IC802.Check the Audio of IC802 Pins1, 14.

(No.YD068)1-47

Page 48

(B) Hi-Fi Playback

PB mode

No Sound.

YES

Check the Vcc of IC801

(Pins34, 40)

YES

Check the Hi-Fi Selection switch.

(IC801 Pin41) and the Tape quality.

YES

Is the RF Envelope at

IC801 Pin44 over 2Vp-p?

YES

Check IC801 Pin42(Data),

Pin43(Clock)

YES

Do Audio Signals appear at

IC801 Pin16(L-CH), 17(R-CH)?

YES

Do Audio Signals appear at

IC802 Pin10(L-CH), 16(R-CH)?

YES

Check Power 5.0V, 12VT.

Check IC501 Pin26 (A.H/SW)

Check the parts of -COM (IC501 Pins17, 18)

Check the Connection at P3D01 Pins7, 9.

Check the A.IN line of IC802(C850, C852)

Do Audio Signals appear at IC802 Pins11, 16?

Do Audio Signals appear at JK902?

1-48 (No.YD068)

NO NO

Check the Vcc of IC802 Pin13.

YES YES

Replace IC802.

Check the Jack(JK902)

Check Power.

Page 49

(C)

Hi-Fi REC.

It can't be recorded Hi-Fi Audio signal.

YES

Check Vcc of IC801.(Pins34, 40)

YES

Check IC801 Pin42(Data), Pin43(CLOCK).

YES

Do Audio signals appear at IC801 Pins16, 17?

YES

Do FM Audio signals appear at IC801 Pin36?

YES

Check the Contact Point of Drum Connector if good then Replace the Drum.

Check Power 5V, 12V.

Check ports of -COM. (IC501 pins 17, 18)

Check Audio input signal of IC801 Pins2, 3(TU.A.), 4, 5(DVD.A.), 6, 7(AVI.A.), 8, 9(AV2.A.), 10, 11(AV3.A.).

Replace IC801.

(No.YD068)1-49

Page 50

5.1.6 Tuner/IF CIRCUIT

(A) No Picture on the TV screen

No picture on the TV screen

YES

Does the Video signal at the TU701 Pin19.

YES

Is 33VT applied to TU701 Pin17?

YES

Is 5VT applied to TU701 Pin4?

YES

Does the Clock signal appear at TU701 Pin12?

YES

Does the data signal appear at TU701 Pin13?

YES

Replace Tuner.

NONO

Hi-Fi REC.

Check 5V line.

Check the lIC Clock Signal of -COM Pin18.

Check the lIC Data Signal of -COM Pin17.

Does Sync appear at

IC501 Pin111.

YES

Does the Video signal at

the IC501 Pin47.

YES

Does the Video signal at

the IC301 Pin61.

YES

Does the Video signal at

the IC903 Pin6.

YES

Check the signal flow from IC903 Pins26, 27 to SC901 Pin19.

Check the signal flow from TU701 Pin19 to IC301 Pin48.

Check the signal from IC301 Pin65 to IC501 Pin49.

Check the signal from IC501 Pin47 to IC301 Pin56.

Check the signal from IC903 Pin6 to IC301 Pin61.

1-50 (No.YD068)

Page 51

(B) No Sound

No Sound.

YES

Check the Vcc of IC751 Pins1, 11, 19, 22, 33.

YES

Check the Tuner SiF signal at IC751 Pin2.

YES

Check the oscillator of IC751 Pins5, 6.

YES

Check the Audio of IC751 Pins30, 31.

YES

Check the Audio of IC801 Pins2, 3.

YES

Check 5.0V Line.

Check the Tuner SIF of TU701 Pin22.

Replace X751

Check the IIC Clock and Data at IC751 Pins12, 13.

Check the signal flow from IC751 Pins30, 31 to IC801 Pins2, 3.

Check the Audio of IC801 Pins16, 17.

YES

Check the Audio of IC802 Pins3, 5.

YES

Check the Signal flow from IC802 Pins3, 5, SC901 Pins1, 3.

Check the IIC Clock and Data at IC801 Pins42, 43.

Check the signal flow from IC801 Pins16, 17 to IC802 Pins11, 16.

(No.YD068)1-51

Page 52

5.2 MECHANISM TROUBLESHOOTING GUIDE (VCR PART)

5.2.1 Deck Mechanism

No Auto Rewind operates.

YES

Is output of the end sensor “H”? “H”: 3.5V or less “L”: 0.7V –1V or less

YES

Is voltage at both ends of the IR LED 0.8V-1.5?

YES

Is the Syscon checked?

No F/R operates.

YES

Is the current mode an F/R mode?

Is the end sensor Vcc applied at 5V?

YES

Replace the end sensor.

Replace the LED.

Check the assembly position of the Mode S/W.

Check the Syscon power supply.

YES

Does the Capstan motor rotate?

YES

Does the T/up and the supply reel Operate?

YES

Check the Syscon circuit.

1-52 (No.YD068)

Is normal voltage applied at the Vcc1 and the Vcc2 of the Capstan motor?

YES

Is the Vctl terminal voltage of the Capstan Motor applied at more than 4V?

YES

Replace the Capstan motor.

Check the Servo, Power circuit.

Page 53

Auto Stop operates.

(PLAY/CUE/REV)

Check the assembly mode. Check the spring pinch.

Does the pinch roller attached to the Capstan shaft turn in operation of the Play/Cue/Rev.

YES

Does the T/UP or the supply reel pulse occur?

YES

Check the Syscon, -com.

No cassette loading is done.

Insert the cassette.

Is output of the DFG, DPG normal?

YES

Check the Servo, Syscon.

Replace the reel sensor.

Replace the drum motor.

YES

Is operation of the lever assembly S/W normal?

YES

Does output of the CST IN S/W change? (In insertion of the REC tape: "L"_"H"_"L") (In insertion of the REC prevention tape: "L"_"H"_"L"_"H")

YES

Check the Syscon circuit.

Check the holder assembly CST.

Is the CST IN S/W normal?

YES

Check the Syscon circuit.

Replace the CST IN S/W.

(No.YD068)1-53

Page 54

No tape winding is done in play.

Is the pinch roller attached to the Capstan shaft in operation of play?

YES

Does the T/up reel operate?

YES

Does the Capstan motor turn?

YES

Does the drum motor turn?

YES

Is the DPG, DFG normal?

Check the assembly mode?

Is the Capstan belt hung?

YES

Check the clutch and the idler assembly.

Is normal voltage applied to the capstan motor Vcc1, Vcc2?

YES

Is the Vctl terminal voltage of the Capstan motor applied at more than 4V?

Hang the Capstan belt.

Check the Servo, power circuit.

YES

Are the T/up and the reel sensor normal?

YES

Check the Syscon circuit.

YES

Replace the Capstan motor.

Is the Vcc voltage of the drum motor normal?

YES

Is the Vctl terminal voltage of the drum motor at more than 2.3V?

YES

Replace the drum motor.

Check the Syscon circuit.

1-54 (No.YD068)

Page 55

5.2.2 Front Loading Mechanism

No cassette insert is done.

Does the lever assembly switch operate?

YES

Is the Vcc of the main P.C.B assembly?

YES

Is voltage between the cassette switch terminal and the GND on the main P.C.B assembly?

YES

Check the mode switch position and the Syscon circuit.

Is the lever assembly switch spring normal?

Add or replace the lever assembly switches spring.

YES

Does the CST IN switch operate normally?

Replace the F/L switch.

YES

Check the Syscon circuit.

Check the power circuit.

Is there short between the cassette switch terminal and the GND on the main P.C.B assembly?

YES

Replace the main P.C.B assembly or remove the short part.

Replace the CST IN switch.

No cassette eject is done.

Does the L/D motor turn in reverse?

YES

Does the lever assembly switch operate?

YES

Does the arm assembly F/G operate?

YES

Does the opener door operate?

Check the L/D motor and the drive IC.

Replace the lever assembly switch.

Replace the arm assembly F/L

Replace the opener door.

(No.YD068)1-55

Page 56

No safe adherence of tape is done.

Is cassette insert done?

YES

Does the opener lid operate?

YES

Does the gear rack F/L operate?

YES

Does the opener door operate?

YES

Does the arm assembly F/L operate?

YES

Does the L/D motor operate?

Replace the opener lid.

Replace the gear rack F/L.

Check the assembly status of the opener door.

Replace the arm assembly F/L.

YES

Does the holder assembly cassette move same as the arm assembly F/L?

YES

Replace the front loading mechanism assembly.

1-56 (No.YD068)

Check power supply of the L/D motor.

Check the assembly status of the holder assembly cassette.

Page 57

5.3 ELECTRICAL TROUBLESHOOTING GUIDE (DVD PART)

5.3.1 System operation flow

Power On

1. 8032 initializes SERVO, DSP & RISC registers

2. Write RISC code to SDRAM

3. Reset RISC

Show LOGO

Yes

Tray Close to Closed position

SLED Moves to Inner Position

1. Judge whether have disc and disc type

2. Jump to related disc reading procedure

Tray Closed?

SLED at Inner

Side?

Recieve

OPEN/ CLOSE

Key?

Yes

1. Execute Pressed Key & IR Key

2. Systemoperati on Routi ne Loop

1. Stop Playback & Open Tray

2. Display tray open message & LOGO

Receive

CLOSE Key?

Yes

(No.YD068)1-57

Page 58

5.3.2 SYSTEM Test flow

TEST

Check the AC Voltage

Power PCBA(110V or 220V)

YES

Switch on the Power PCBA

Is the DC Voltage

outputs OK?

(5V,1.8V,3.3V,8V,12V)

YES

Make sure the main PCBA don't

short on VCCs and switch it on.

Replace power PCBA or

AC transformer.

Repair or Replace Power PCBA

Is 3.3V and 1.8V DC

outputs normal on main

PCBA?

YES

Connect to PC CN601 Cable and update the FLASH memory code.

Update FLASH

successfully?

YES

Check the regulators or related diodes.

1. Check 27MHz system clock.

2. Check system reset circuit.

3. Check FLASH R/W enable signal PRD,RWR.

4. Check CN601 SIGNALS.

5. Check FLASH Memory related circuit.

1-58 (No.YD068)

Page 59

RESET or Power On.

Show LOGO?

YES

Flash Memory operates

properly?

YES

SDRAM works properly?

YES

ZR36868 VIDEO outputs

properly?

YES

Have TV signal output?

YES

Check AV cable connection

to TV set.

Check connection lines between FLASH & ZR36868 and the FLASH access time whether is suitable or not.

Check connection lines between SDRAM & ZR36868 and the SDRAM is damaged.

Check the related circuit of ZR36868

Check the filtering and amp circuit of

TV signal.

Does Tray move

inside when it is not

at closed position?

YES

NO NO

Normal TROUT &TRIN

signals?

YES

Normal TRCLOSE &

TROPEN signal?

YES

Normal LOAD+ & LOAD-

signal?

YES

Check the cable connection between

main PCBA and loader.

Check the load OPEN & CLOSE switch

Check the Tray control IO pins on MT1389 & BA5954

Check the Tray control amplifying circuit on Motor driver.

(No.YD068)1-59

Page 60

Does

the SLED move

to inner side when it is at

outter position?

NO NO

Motor Driver STBY

Pin is High?

Check the connection line of

STBY signal.

YES

Do not put in disc and tray close.

YES

Is SLED_S

DC Level higher

than 1.4V?

YES

SLED+ and

outpup

SEDL-

properly?

YES

Check the cable connection with

MECHA.

Check the related circuit of

SLED_S.

Check the amp circuit on motor

driver.

Optical Lens has

movements for searching

Focus?

YES

NO NO

Check cable connect on with

pick-up head.

Proper

FOCUS_S outputs

to motor driver?

YES

Proper FACT- & FACT+

outputs?

YES

Check FFOCUS_S connection on

ZR36868 and motor dirver.

Check the amp circuit on motor

dirver.

1-60 (No.YD068)

Page 61

Laser turns on when

reading disc?

YES

Put disc in? Laser off

YES

Disc ID is correct?

YES

NO NO

DVD_LD or CD_LD output

Collector voltage of

power transistor is OK?

Check cable connection between transistor ouput and pick-up head.

Check DVD_LD & CD_LD signal

properly?

YES

Check the laser power circuit on ZR36868 and connecting to

power transistor.

Check the related circuit on

laser power transistor

Does spindle rotate?

YES

NO NO

Check the cable connection

between spindle and main PCBA.

Proper

SPINDLE_S signal on

ZR36868

YES

MOT_SPDL-

& MOT_SPDL+ output

properly?

YES

Check SPINDLE_S related circuit on ZR36868

Check the spindle control

amp circuit of motor driver.

(No.YD068)1-61

Page 62

YES

Focus ON OK?

YES

Track On OK?

YES

Proper signals on

A,B,C,D of ZR36868

YES

Check FOCUS_S signal on ZR36868

Properly

TRACK_S signal

on ZR36868?

YES

TACT+ & TACToutput properly?

YES

Check cable connection on

pick-up head.

Check connections between

ZR36868 and Pick-up head.

Check the TRACK_S

connection on ZR36868

and motor dirver.

Check the tracking control amp circuit on motor

driver.

Disc is play ?

YES

Check RF & VC signal waveform.

1-62 (No.YD068)

Page 63

Normal Audio output when disc playba

Normal IR.VFD & Front pannel key functions

TEST EN

ck?

YES

Audio DAC received

correct data stream?

YES

Normal Audio DAC

out?

YES

Check Audio filter,amplify,mute

circuit

Communications between

IR.VFD Front pannel key & ZR36868

is normally

YES

Check the cable connection on Front pannel

Check connection between

ZR36868 & Audio

Check the related circuit of Audio

Check communication lines on ZR36868.

DAC.

(No.YD068)1-63

Page 64

5.4 DETAILS AND WAVEFORMS ON SYSTEM TEST AND DEBUGGING

5.4.1 SYSTEM 27MHz CLOCK, RESET, FLASH R/W SIGNAL

1) ZR36868 main clock is at 27MHz(X501)

1.0V, 27MHz

2) ZR36868 reset is low active

FIG 1-1

5.3VA

PWR_CTL_H

M_RESET(FRONT)

1-64 (No.YD068)

FIG 1-2

Page 65

3) CN601 waveform during procedure(Downloading)

FIG 1-3

DUPTDO

DUPRDO

4) Flash R/W enable signal during download(Downloading)

FIG 1-4

FRD

FWR

(No.YD068)1-65

Page 66

5.4.2 SDRAM CLOCK

5.4.3 TRAY OPEN/CLOSE SIGNAL

DCLK = 135MHz, Vp-p=2.2, Vmax=2.7V

FIG 2-1

1) Tray open/close waveform

OPEN

FIG 3-1

1-66 (No.YD068)

Page 67

5.4.4 SLED CONTROL RELATED SIGNAL (NO DISC CONDITION)

FIG 4-1

5.4.5 LENS CONTROL RELATED SIGNAL(NO DISC CONDITION)

SLED_S(2.0V/1.4V/1.0V)

SLED+(4.7V/4.0V/2.6V)

SLED-(5.3V/4.0V/3.0V)

FIG 5-1

FOCUS_S(1.5V/1.4V/1.3V)

FACT+(4.0V/3.6V/3.2V)

FACT-(4.0V/3.6V/3.2V)

(No.YD068)1-67

Page 68

5.4.6 LASER POWER CONTROL RELATED SIGNAL(NO DISC CONDITION)

FIG 6-1

MD_CD(0V/180mV)

MD_LD(5.0V//3.5V)

DVD_LD(5.0V/3.6V)

5.4.7 DISC TYPE JUDGEMENT WAVEFORM

F+

RFL

FIG 7-1 (DVD)

1-68 (No.YD068)

Page 69

FIG 7-2 (DVD)

F+

RFL

F+

FIG 7-3 (CD)

RFL

(No.YD068)1-69

Page 70

5.4.8 FOCUS ON WAVEFORM

F+

RFL

FIG 7-4 (CD)

FIG 8-1 (DVD)

FOCUS_S

FACT+

FACT-

1-70 (No.YD068)

Page 71

FIG 8-2 (CD)

5.4.9 SPINDLE CONTROL WAVEFORM (NO DISC CONDITION)

FOCUS_S

FACT+

FACT-

SPINDLE_S

FIG 9-1

MOT_SPDL-(3.6V/2.4V)

MOT_SPDL+(3.6V/4.8V)

(No.YD068)1-71

Page 72

5.4.10 TRACKING CONTROL RELATED SIGNAL(System checking)

FIG 10-1(DVD)

TRACK_S

TACT-

TACT+

FIG 10-2(CD)

TRACK_S

TACT-

TACT+

1-72 (No.YD068)

Page 73

5.4.11 ZR36868 AUDIO OPTICAL AND COAXIAL OUTPUT(SPDIF)

FIG 11-1

5.4.12 ZR36868 VIDEO OUTPUT WAVEFORM

1) 100%

FIG 12-1

(No.YD068)1-73

Page 74

2) COMPOSITE VIDEO SIGNAL

FIG 12-2

5.4.13 ZR36868 AUDIO OUTPUT TO AUDIO DAC

FIG 13-1

1-74 (No.YD068)

Page 75

5.4.14 AUDIO OUTPUT FROM AUDIO DAC

FIG 14-1

(No.YD068)1-75

Page 76

Victor Company of Japan, Limited AV & MULTIMEDIA COMPANY DIGITAL VIDEO STORAGE CATEGORY 12, 3-chome, Moriya-cho, kanagawa-ku, Yokohama, kanagawa-prefecture, 221-8528, Japan

(No.YD068)

Printed in Japan

VPT

Page 77

SCHEMATIC DIAGRAMS

DVD PLAYER & VIDEO CASSETTE RECORDER

200

HR-XV28SEF,HR-XV28SEK, HR-XV28SER,HR-XV28SEU, HR-XV28SEY,HR-XV28SEZ

CD-ROM No.SML200505

(EK model)

(EU, EY, EZ models)

(EF, ER models)

HR-XV28SEF,HR-XV28SEK,HR-XV28SER,HR-XV28SEU,HR-XV28SEY,HR-XV28SEZ [D5PV0]

(EF model)

No.YD068SCH

2005/5

Page 78

Page 79

CHARTS AND DIAGRAMS

NOTES OF SCHEMATIC DIAGRAM

Safety precautions The Components indentified by the symbol are

critical for safety. For continued safety, replace safety critical components only with manufacturer's recommended parts.

1. Units of components on the schematic diagram

Unless otherwise specified.

1) All resistance values are in ohm. 1/6 W, 1/8 W (refer to parts list). Chip resistors are 1/16 W.

K: KΩ(1000Ω), M: MΩ (1000KΩ)

2) All capacitance values are in µF, (P: PF).

3) All inductance values are in µH, (m: mH).

4) All diodes are 1SS133, MA165 or 1N4148M (refer to parts list).

Note: The Parts Number, value and rated voltage etc. in the Schematic Diagram are for references only. When replacing the parts, refer to the Parts List.

2. Indications of control voltage

AUX : Active at high.

AUX or AUX(L) : Active at low.

4. Voltage measurement

1) Regulator (DC/DC CONV) circuits REC : Colour bar signal. PB : Alignment tape (Colour bar). — : Unmeasurable or unnecessary to measure.

2) Indication on schematic diagram Voltage indications for REC and PB mode on the schematic diagram are as shown below.

REC mode

12 3

2.5

(5.0)

PB mode

1.8

PB and REC modes (Voltage of PB and REC modes are the same)

Note: If the voltages are not indicated on the schematic

diagram, refer to the voltage charts.

5. Signal path Symbols

The arrows indicate the signal path as follows.

NOTE : The arrow is DVC unique object.

Playback signal path

Playback and recording signal path

CIRCUIT BOARD NOTES

1. Foil and Component sides

1) Foil side (B side) : Parts on the foil side seen from foil face (pattern face) are indicated.

2) Component side (A side) : Parts on the component side seen from component face (parts face) indicated.

rts location are indicated by guide scale on the circuit board.

2. Parts location guides

Parts location are indicated by guide scale on the circuit board.

REF No.

IC101 B C 6 A

(A : Component side)

D : Discrete component)

B : Foil side

C : Chip component

Note: For general information in service manual, please

refer to the Service Manual of GENERAL INFORMATION Edition 4 No. 82054D (January 1994).

LOCATION

Category : IC

Horizontal “A” zone

Vertical “6” zone

3. Interpreting Connector indications

Removable connector

Wire soldered directly on board

Non-removable Board connector

Board to Board

Connected pattern on board The arrows indicate signal path

Note: For the destination of each signal and further line connections that are cut off from the diagram, refer to "BOARD INTERCONNECTIONS"

Recording signal path (including E-E signal path)

Capstan servo path

Drum servo path

(Example)

R-Y

Playback R-Y signal path

Recording Y signal path

6. Indication of the parts for adjustments

The parts for the adjustments are surrounded with the circle as shown below.

7. Indication of the parts not mounted on the circuit board

“OPEN” is indicated by the parts not mounted on the circuit board.

R216

OPEN

2-1 2-2

Page 80

OVERALL WIRING DIAGRAM

DECK

(SMPS)

BOARD

POWER(SMPS) Page2-5 SHEET 1

POWER

123456789

P3D01

SP PB A

123456789

SP REC

SP PB B

EP PB B

EP REC

EP PBA

Hi-Fi REC

Hi-Fi PB A

123456789

CFG

PMC01

Hi-Fi PB B

12VA(CAP)

123456789

5.2VA

I-limit

CAP REV'H'

GND

MOTOR GND

101112

LD IN

CAP CTL

12VA(DRUM)

101112

DFG/FG

DRUM CTL

12345

CTL(-)

P3D02

CTL(+)

12345

A/E(-)

A/E(+)

A.PB

A.REC

GND

P3D03

FULL ERASE

123456789

GND8VGND

PPM01

REG_9V

REG_12V

MOTOR_Vcc

123456789

33V

3.3V

PWR_CTL'H'

101112

GND

5.3VA

101112

M5V/5VT

123456789

DVD_LD

DVD_PD

VOL(DVD)

GND

Vcc(HF)

PMD01 PMD02

123456789

10111213141516171819202122

Vcc(HF)

VC_INPUT

10111213141516171819202122

F(+)

T(-)

T(+)

F(-)

Vcc

GND

CD_LD

CD_PD

VOL(CD)

123456789

LM -

FM -

LM +

FM +

SPM -

SPM +

PMD03

123456789

GND

SW(OPEN)

SW(CLOSE)

SW(LEAD IN)

GND

A/V Page2-7 SHEET 2 SYSTEM Page2-9 SHEET 3 TUNER/IF Page2-11 SHEET 4 HiFi AUDIO Page2-13 SHEET 5 SCART(JACK) Page2-15 SHEET 6 DVD SERVO Page2-17 SHEET 7 DVD AV/JACK Page2-19 SHEET 8 DVD SYSTEM Page2-21 SHEET 9

KEY

BOARD

K-RTN2

1 2

GND

1 2

VCR MAIN

BOARD

BCDEFG

2-3 2-4

Page 81

POWER(SMPS) CIRCUIT DIAGRAM

IMPORTANT SAFETY NOTICE

WHEN SERVICING THIS CHASSIS, UNDER NO CIRCUMSTANCES SHOULD THE ORIGINAL DESIGN BE MODIFIED OR ALTERED WITHOUT PERMISSION FROM THE JVC ELECTRONICS CORPORATION. ALL COMPONENTS SHOULD BE REPLACED ONLY WITH TYPES IDENTICAL TO THOSE IN THE ORIGINAL CIR-

CUIT. SPECIAL COMPONENTS ARE SHADED ON THE SCHEMATIC FOR EASY IDENTIFICATION.

THIS CIRCUIT DIAGRAM MAY OCCASIONALLY DIFFER FROM THE ACTUAL CIRCUIT USED. THIS WAY, IMPLEMENTATION OF THE LATEST SAFETY AND PERFORMANCE IMPROVEMENT CHANGES INTO THE SET IS NOT DELAYED UNTIL THE NEW SERVICE LITERATURE IS PRINTED.

NOTE :

1. Shaded( ) parts are critical for safety. Replace only with specified part number.

2. Voltages are DC-measured with a digital voltmeter during Play mode.

NOTES) Symbol denotes AC ground.

NOTES) Symbol denotes DC chassis ground.

NOTE) Warning

NOTE) Parts that are shaded are critical NOTE) With respect to risk of fire or NOTE) electricial shock.

BCD EFG

2-5 2-6

SHEET 1

Page 82

A/V CIRCUIT DIAGRAM

IC301 Pin70 is defective.

PB COLOR Signal disappear.

D301or IC301 Pin 80

REC is defective.

Q305 is defective.

EE, PB Screen doesn t appear.

IC301 Pin 69, 68 are defective.

PB and Recording is failed.

(IC301 doesn t operate.)

IC301 Pin 84 is defective.

Audio Tracking is failed.

Q302, Q303, Q314

are defective.

No mono Audio Signal

PB Y+C

PB Y

PB C

PB SECAM COLOR

in PB MODE.

REC Y+C

REC Y

REC C

REC SECAM COLOR

BCDEFG

Q301, Q306 are defective.

Normal Audio signal is not recorded.

REC AUDIO

PB AUDIO(MONO)

WAVEFORM

2-7 2-8

X301 is defective.

PB COLOR Signal disappear.

SHEET 2

Page 83

SYSTEM CIRCUIT DIAGRAM

Deck will not operate.

R575, R576, R577,

R578 are defective.

VCR will not operate.

Q501, Q503 are defective.

IC505 is defective.

µ-COM is unstable.

Auto stop occures.

RS501,RS502 are defective.

WAVEFORM

Auto Rew will not working.

ES501, ES502, LD501 are defective.

BCD EFG

CLOCK SETTING will not operate.

X501 is defective.

2-9 2-10

µ-COM will not operate.

X502 is defective.

SHEET 3

Page 84

TUNER/IF CIRCUIT DIAGRAM

EE MODE(VIDEO)

TU MODE (AUDIO)

SHEET 4

BCDEFG

2-11 2-12

Page 85

Hi-Fi AUDIO CIRCUIT DIAGRAM

IC801 Pins42, 43 aredefective.

All Audio is not appear.

44 Pin is defective. Hi-Fi Audio is not appear.

REC

SHEET 5

BCD EFG

2-13 2-14

Page 86

SCART(JACK) CIRCUIT DIAGRAM

SHEET 6

BCDEFG

2-15 2-16

Page 87

ع DVD SERVO CIRCUIT DIAGRAM

SHEET 7

BCD EFG

2-17 2-18

Page 88

ع DVD AV/JACK CIRCUIT DIAGRAM

SHEET 8

BCDEFG

2-19 2-20

Page 89

ع DVD SYSTEM CIRCUIT DIAGRAM

SHEET 9

BCD EFG

2-21 2-22

Page 90

PRINTED CIRCUIT DIAGRAMS

VCR MAIN BOARD

-TOP SIDE-

2-23 2-24

Page 91

VCR MAIN BOARD

-BOTTOM SIDE-

2-25 2-26

Page 92

COMPONENT PARTS LOCATION GUIDE <VCR MAIN>

2-27 2-28

Page 93

POWER BOARD

LOCATION GUIDE

KEY BOARD

LOCATION GUIDE

2-29 2-30

Page 94

OVERALL BLOCK DIAGRAM

DECK MECHANISM

SPINDLE

MOTOR

LOAD+,LO AD-

M5V

DISC

SLED

(FEEDING)

MOTOR

SLED+,SL ED--

IC201

BA5888FP

MOTOR

DRIVER

DV33

IC604

MX26LV800T

FLASH ROM

PICK

FACT+/-,TACTT +/-

MOT_SPDL +/-

TRACK_ S,FOCUS_S,SLED_S SPINDLE_S

CN601

DOWNLOAD

DVD:RF,A,B, C,D CD:RF,A,B ,C,D,E,F

MD_CD

AL PC

DRVSB, OPEN, CLOSE

DVD_LD,CD_LD, V C

PICKSEL

HOMESW

OUTSW , INSW

HYPER_TERMINAL

CN602

MEMAD[00:18 ] FLASHCSMEMRDMEMWR-

MEMDA[0:14]

DV33

IC602

M12L16161A

SDRAM

RAMADD[00:10] RAMBA PCLK RSMCS0 RAMRAS# RAMCASRAMWE-

RAMDAT[00:15]

RAMDQM

IC601

ZR36868

DSP/MPEG/RF

AIN

RFV33/DV33/1.8V

KARAOKE OPTION

MIIC_DET

IC607

CS5331A

AM CL K AB CLK ALRCLK

AL PCL K AB CLK AM CL K AOUTO

AUDIO_MUTE

ASPDIF COAX

IC402

NJM4580

OP-AMP

IC605

KS24C021CS

EEPROM

IC401

PCM1753(2DAC)

+12V

MIC_IN

KARAOKE

OPTICAL

AC 90V~240V

50HZ/60Hz

POWER

BOARD

MOTOR_VCC

REG_12V

REG_9V

3.3V

PWR_CTL_H

33V

5.3VA

5.0V

M5V/5VT

VCR_DATA DVD_RESET

IC501

M37760

VCR MICOM

2-31 2-32

DVD_ENA* DVD_CLK DVD_DATA*

27MHz X-TAL

5V/REG12V

IC801

LA72670BM

HIFI

Y / C

Pr(R)

Pb(B )

Y(G)

Page 95

POWER(SMPS) BLOCK DIAGRAM

BD101

T101

TRANS

NOISE FILTER

BLOCK

(C101,L102,

C102)

FUSE

RESISTOR

(FR101)

C103

SNUBBER

BLOCK (D101,C105 C106,R104)

657 8

DRIVE & S/W BLOCK

(IC101, D102, R105,

C104, C108 , C109,

C107,ZD102)

RECTIFIER &

SMOOTING BLOCK

(D124,C124,C134,

R121,L124,C121)

RECTIFIER &

SMOOTING BLOCK

(D123,C127,C137,

L127)

RECTIFIER &

SMOOTING BLOCK

(D121,C126,R136)

12V REG BLOCK

(Q166,ZD151,C160,

R166,C159)

3.3V REG BLOCK

(IC131,C158,R165)

33V S/W BLOCK

(Q161,R154,R155)

MOTOR VCC

14VA

REG12V

3.3V

33V

BR BL

(BK)(WH)

Y-CAP

C110

Y-CAP

C111

PHOTO COUPLER

(IC102)

ERROR

(IC103)

2-33 2-34

RECTIFIER &

SMOOTING BLOCK

(D122, C128,

L128, C138)

FEED-BACK

BLOCK

(R141,R142,

C143,R143.

R144.R145

AMP

R146)

5V S/W BLOCK

(Q165,C164,R172,

R174)

5VT S/W BLOCK

(Q163,C162,D127,

R156,R157)

PWR CTL BLOCK

(Q162,C161,R164,

R163)

5.3VA

5.0V

M5V/5VT

PWR CTL'H'

Page 96

Y/C BLOCK DIAGRAM (PB Mode) (REC Mode)

ACC

DET

ACCC LPF

CONV

MAIN

BPF

84V.EN V

LA71750M

IC301

YNR

PB FM EQ FM OEM

Y-LPF

PB FM

AGC

SUB LPF

DE EMP

MAIN

79 78

69 68 67

V.H.SW

C.ROTARY DATA

CLOCK

C.SYNC

Killer C-LPF ACC

Conv

Main

Conv

Main

(To Drum)

SP REC

LA71750M

IC301

BPF

(To Drum)

LP REC

YNR

FM EQ

REC

ENH

Y-LPF FBC

CLIP

W/D

DETAIL

AGC

CLIP

W/D

EMPHA

79 78 76 75 70 69 68 67 65 59 58 54 52

REC'H'

V.H.SW

C.ROTARY

DATA

CLOCK

C SYNC

V.OUT MICOM

2521

18 14

CNC

LA70100M

IC201

SYNC IN

LPF

CCD

C-Delay

(1H/2H)

Y-Delay

Y/C MIX

60dB AMP

65 63 61

V.OUT (MICOM)

S2 V.OUT

S1 V.OUT

2-35 2-36

4.43MHz

CLK-IN

2721

2928

VX02 VX02

KILL DEC

REC APC

COMP

AMP

DELAY

1H/2H

Y-DEL AY

50 V.IN2 S1

V.IN1 TUNER

IC201 LA70100M

2 12

29 16

V.IN4 FRONT

V.IN3 DEC

Page 97

SYSTEM BLOCK DIAGRAM

LD(+) LD(-)

R522, C568

L/M CONTROL R525, R526

MN101D10X

Q504, 505 R506, 507, 508, 509, 511 C504, 511

L503, C507, C509

L504, C505, C506

2fsc L505, Q506,

R537, 539, 584, 585, C553, 554

2-37 2-38

Page 98

TUNER/IF, NICAM & A2 BLOCK DIAGRAM VPS BLOCK DIAGRAM

TU_VIDEO

AFT

TU_A_R

TU_A_L

IIC CLK

IIC DATA

MSP3417

MSP3407

VPS_VIDEO

IIC DATA

IIC CLK

TU_SE_VL_H

TU_SECAM_H

33V

MOD_VIDEO

MOD_AUDIO

5.4VA

SW1

SW2

A.OUT

AFT

SIF

2-39 2-40

Page 99

Hi-Fi AUDIO BLOCK DIAGRAM

VIDEO INPUT

BLOCK

AUDIO INPUT

BLOCK

Tu A.IN 'L'

Tu A.IN 'R'

DVD A.IN 'L'

DVD A.IN 'R'

EU1 A.IN 'L'

EU1 A.IN 'R'

EU2 A.IN 'L'

EU2 A.IN 'R'

AV2 A.IN 'L'

AV2 A.IN 'R'

Hi-Fi/

REC

36 35

Hi-Fi REC

Hi-Fi PB 'B'

Hi-Fi PB 'A'

IC801

A.OUT 'L'

A.OUT 'R'

EU2.A.OUT.L

EU2.A.OUT.R

OSD V. IN

16 3

IC802

DVD/R V. IN

142 12

RF_H

DVD_FR_VIDEO

A.OUT

To JACK

NORMAL AUDIO

OUT(To AVCP)

NORMAL AUDIO

IN(From AVCP)

21 22

SCART 2

2-41 2-42

DVD_H

DVD A.IN 'L'

AUDIO INPUT BLOCK

MODULATOR

A.OUT (To Tu)

DVD A.IN 'R'

Page 100

IC BLOCK

IC503_24WC16P

IC101_ICE3B0565

IC131_78R33

IC102_LTV-817B

IC501_MN101D10X

IC504_KIA7031P

IC141_78R08

IC3S1_LA70100M

IC505_KIA7042

IC301_LA71750EM

IC751_MSP3417/3407IC5F1_PT6955

2-43 2-44