Sony SLV-7700KME, SLV-7700KML Service Manual

SLV-7700KME/7700KML

RMT-V208

SERVICE MANUAL

Photo : SLV-7700KME

SPECIFICATIONS

ME Model

SLV-7700KME

E Model

SLV-7700KML

H MECHANISM

•Refer to the SERVICE MANUAL of VHS MECHANICAL ADJUSTMENT (H MECHA) for MECHANICAL ADJUSTMENTS. (9-973-623-11)

MICROFILM

VIDEO CD PLAYER/

VIDEO CASSETTE RECORDER

SAFETY-RELATED COMPONENT WARNING!!

COMPONENTS IDENTIFIED BY MARK ! OR DOTTED LINE WITH MARK ! ON THE SCHEMATIC DIAGRAMS AND IN THE PARTS LIST ARE CRITICAL TO SAFE OPERATION. REPLACE THESE COMPONENTS WITH SONY PARTS WHOSE PART NUMBERS APPEAR AS SHOWN IN THIS MANUAL OR IN SUPPLEMENTS PUBLISHED BY SONY.

SAFETY CHECK-OUT

After correcting the original service problem, perform the following safety checks before releasing the set to the customer.

1. Check the area of your repair for unsoldered or poorly-soldered connections. Check the entire board surface for solder splashes and bridges.

2. Check the interboard wiring to ensure that no wires are "pinched" or contact high-wattage resistors.

3. Look for unauthorized replacement parts, particularly transistors, that were installed during a previous repair . Point them out to the customer and recommend their replacement.

4. Look for parts which, through functioning, show obvious signs of deterioration. Point them out to the customer and recommend their replacement.

5. Check the B+ voltage to see it is at the values specified.

6. Flexible Circuit Board Repairing

• Keep the temperature of the soldering iron around 270˚C during repairing.

• Do not touch the soldering iron on the same conductor of the circuit board (within 3 times).

• Be careful not to apply force on the conductor when soldering or unsoldering.

— 2 —

T ABLE OF CONTENTS

SERVICE NOTE

VHS

1. Removal of Drum Assembly ·············································· 5

2. Upper Drum Replacement ·················································· 5 2-1. Removal of Upper Drum ···················································· 5 2-2. Mounting Upper Drum ······················································· 5

3. Periodic Check and Replacement······································· 6 3-1. Cleaning of Rotating Head Disk Assembly························ 6 3-2. Cleaning of the Tape Movement System····························6 3-3. Cleaning the Drive System ················································· 6 VIDEO-CD

1. Removing the Video-CD Mechanism Deck (When not Energized) ························································ 7

2. Removing the Disc (When not energized) ························· 7

1. GENERAL

Index to parts and controls ························································ 1-1 Getting Started

Step 1: Unpacking ·································································1-2 Step 2: Setting up the remote commander ·····························1-3 Step 3: Connecting the unit ···················································1-3 Step 4: Tuning your TV to this unit ·······································1-3 Step 5: Presetting channels ····················································1-4 Step 6: Setting the clock ························································1-7

Basic Operations – VHS part

Playing a tape·········································································1-8 Recording TV programmes ···················································1-9 Recording TV programmes using the timer ························1-10

Basic Operations – VCD part

The VCD part of this unit can play the various discs ·········· 1-10 Playing a VIDEO CD/Audio CD·········································1-10 Using the display window ··················································· 1-11

Basic Operations – Karaoke function

Before you start karaoke ······················································1-12 Karaoke sing-along ······························································1-12 Displaying the karaoke information ····································1-13

Enjoying Playback and Recording a Tape

Playing/searching at various speeds ····································1-13 Checking/changing/cancelling timer settings ······················ 1-13 Editing with another VCR ···················································1-14 Searching with the index function ·······································1-14 Adjusting the picture ···························································1-15 Changing menu options ·······················································1-15 Audio dubbing ·····································································1-15

Enjoying Playback of a VIDEO CD/Audio CD

Locating scenes directly using the scene numbers (Scene Search) ·····································································1-16 Resuming playback from the point you stopped a VIDEO CD (Resume Play)··················································1-16 Locating a particular point in a scene or track·····················1-17 Playing repeatedly ······························································· 1-17 Playing a random order (Shuffle Play) ································1-18 Creating your own programme (Programme Play) ·············1-18 Playing a VIDEO CD with PBC functions (PBC Playback)··1-19 Switching the sound·····························································1-19

Enjoying Karaoke Sing-along

Programming the order of the songs····································1-20 Using the various functions ·················································1-20 Recording your karaoke singing ··········································1-21

Additional Information

Precautions···········································································1-21 Troubleshooting ···································································1-22

2. DISASSEMBLY

2-1. Upper Case ······································································2-1 2-2. Front Panel Assy······························································2-1 2-3. Jack Block, MJ-92 Board ················································2-1

2-4. HI-66 Board·····································································2-2 2-5. SW-323 Board, IO-65 Board ··········································· 2-2 2-6. VCD Mechanical Block ··················································2-2 2-7. CD-169 Board ·································································2-2 2-8. PS-418 Board ··································································2-3 2-9. RP-233 Board ·································································· 2-3 2-10. MA-303 Board ································································2-3 2-11. Mechanism Deck ·····························································2-4 2-12. TU-168 Board··································································2-4 2-13. MB-77 Board···································································2-4 2-14. Internal Vie ws··································································2-5 2-15. Circuit Boards Location ··················································2-6

3. SERVICE POSITION

3-1. HI-66, IO-65, SW-323 and MJ-92 Boards ······················3-1 3-2. MA-303, TU-168 and PS-418 Boards·····························3-1 3-3. CD-169 and BD-21 Boards ·············································3-2 3-4. MB-77 Board···································································3-2

4. BLOCK DIAGRAMS

4-1. Overall Block Diagram (1/2)···········································4-1 4-2. Overall Block Diagram (2/2)···········································4-3 4-3. Video Block Diagram ······················································4-5 4-4. Audio Block Diagram ·····················································4-7 4-5. Display Control Block Diagram······································4-9 4-6. Servo/System Control Block Diagram ·························· 4-11 4-7. Karaoke, Audio I/O Block Diagram······························4-13 4-8. Video CD Block Diagram (1/2)·····································4-15 4-9. Video CD Block Diagram (2/2)·····································4-19 4-10. Tuner Block Diagram ····················································4-21 4-11. Power Block Diagram ···················································4-23

5. PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS

5-1. Frame Schematic Diagram ················································5-1 5-2. Printed Wiring Boards and Schematic Diagrams··············5-3

• This Note is Common for Printed Wiring Boards and Schematic Diagrams····················································5-3

• CD-169 (Video-CD, Mecha Control)

Schematic Diagram (1/2) ································5-5

• CD-169 (Video Encoder)

Schematic Diagram (2/2) ································5-7

• CD-169 (VCD Mecha Control, MPEG)

Printed Wiring Board ······································5-9

• BD-21 (RF AMP), Loading (Loading Motor)

Schematic Diagrams ·····································5-11

• BD-21 (RF AMP), Loading (Loading Motor)

Printed Wiring Boards···································5-13

• RP-233 (Head AMP)

Schematic Diagram ······································· 5-15

• RP-233 (Head AMP)

Printed Wiring Board ····································5-17

• MA-303 (Video/Audio Process, Servo/System Control)

Printed Wiring Board ····································5-19

• MA-303 (Servo/System Control)

Schematic Diagram (1/5) ······························5-21

• MA-303 (CTL, REC/PB Control)

Schematic Diagram (2/5) ······························5-23

• MA-303 (Selector)

Schematic Diagram (3/5) ······························5-25

• MA-303 (Audio Processor)

Schematic Diagram (4/5) ······························5-27

• MA-303 (Y/C Video Process)

Schematic Diagram (5/5) ······························5-29

• MB-77 (Karaoke DSP, Audio I/O)

Printed Wiring Board (Side A)······················5-31

— 3 —

• MB-77 (Karaoke DSP, Audio I/O) Printed Wiring Board (Side B) ······················ 5-33

• MB-77 (Karaoke DSP) Schematic Diagram (1/4) ······························5-35

• MB-77 (Audio I/O) Schematic Diagram (2/4) ······························5-37

• MB-77 (Surround Processor) Schematic Diagram (3/4) ······························5-39

• MB-77 (Video Select) Schematic Diagram (4/4) ······························5-41

• HI-66 (Display/Function Control) Schematic Diagram ······································· 5-43

• HI-66 (Display/Function Control) Printed Wiring Board ····································5-45

• SW-323 (Function Switch) Printed Wiring Board ····································5-47

• SW-323 (Function Switch) Schematic Diagram ······································· 5-48

• MJ-92 (MIC AMP) Printed Wiring Board ····································5-49

• MJ-92 (MIC AMP) Schematic Diagram ······································· 5-50

• IO-65 (Front Jack) Schematic Diagram ······································· 5-51

• IO-65 (Front Jack) Printed Wiring Board ····································5-53

• TU-168 (Tuner) Schematic Diagram ······································· 5-55

• TU-168 (Tuner) Printed Wiring Board ····································5-57

• PS-418 (Power Supply) Schematic Diagram ······································· 5-59

• PS-418 (Power Supply) Printed Wiring Board ····································5-61

• Waveforms ·································································5-63

6. INTERFACE AND IC PIN FUNCTION

6-1. System Control -Video Block Interface ··························6-1 6-2. System Control -Servo Peripheral Circuit Interface········6-2 6-3. System Control -Mechanism Interface····························6-3 6-4. System Control -System Control

Peripheral Circuit Interface ·············································6-4 6-5. System Control -Hi-Fi Audio Block Interface ················ 6-4 6-6. System Control -Normal Audio Block Interface ·············6-4 6-7. AV Control -Input Selection Block Interface ··················6-5 6-8. Servo/System Control Microprocessor

Port Function Description ··············································· 6-6 6-9. Display/Function Control Microprocessor

Port Function Description ··············································· 6-7 6-10. Video-CD Mechanism Control Microprocessor

Port Function Description ··············································· 6-8 6-11. MPEG Decoder Port Function Description···················6-10 6-12. Video Encoder Port Function Description·····················6-12 6-13. Karaoke/Digital Sound Processor

Port Function Description ············································· 6-14

2-3. Power Supply Check ·······················································7-3 2-3-1.Output V oltage Check······················································7-3 2-4. Video-CD System Adjustments·······································7-3 2-4-1.S-Curve Check ································································7-3 2-4-2.RF Level Check ·······························································7-4 2-4-3.E-F Balance (Traverse) Check ········································7-4 2-4-4.RF PLL Free-run Frequency Check ································7-5 2-4-5.Clock Adjustment ····························································7-5 2-5. Servo System Adjustment ···············································7-5 2-5-1.RF Switching Position Adjustment ·································7-5 2-6. Video System Adjustments··············································7-6 2-6-1.X'tal OSC Check ·····························································7-6 2-6-2.SYNC AGC Check ··························································7-6 2-6-3.White Clip/Dark Clip Check ···········································7-6 2-6-4.REC Y Level Check ························································7-7 2-6-5.REC Chrome Level Check ··············································7-7 2-6-6.Playback Level Check ·····················································7-7 2-6-7.VCO Frequency Adjustment ···········································7-7 2-7. Audio System Adjustments ·············································7-8 2-7-1.AF Switching Position Adjustment ································· 7-8 2-7-2.VCO f 2-7-3.Deviation Check ······························································7-9 2-7-4.Band Pass Filter f0 Adjustment ········································7-9 2-7-5.ACE Head Adjustment ·················································· 7-10 2-7-6.Recording Bias Check ···················································7-10 2-7-7.E-E Output Level Check ··············································· 7-10 2-7-8.Overall Output Level and Distortion Factor Check·······7-10 2-7-9.Overall Noise Level Check············································7-10 2-8. Adjustment Parts Location Diagrams····························7-11

Adjustment·························································· 7-9

8. REPAIR PARTS LIST

8-1. EXPLODED VIEWS ······················································8-1 8-1-1.Case Assembly ································································8-1 8-1-2.Front Panel Assembly······················································8-2 8-1-3.Chassis Assembly ····························································8-3 8-1-4.VCD Mechanical Deck Assembly (CDM14-5BD21) ·····8-4 8-1-5.Optical Pick-up Assembly (BU-5BD21)·························8-5 8-1-6.VHS Mechanical Deck Assembly (1) ·····························8-6 8-1-7.VHS Mechanical Deck Assembly (2) ·····························8-7 8-1-8.VHS Mechanical Deck Assembly (3) ·····························8-8 8-1-9.VHS Mechanical Deck Assembly (4) ·····························8-9 8-2. ELECTRICAL PARTS LIST ········································8-10

7. ADJUSTMENTS

7-1. MECHANICAL ADJUSTMENTS································· 7-1 7-2. ELECTRICAL ADJUSTMENTS ···································7-1 2-1. Preparation Before Adjustment ·······································7-1 2-1-1.Equipment Required ························································7-1 2-1-2.Equipment Connection ····················································7-1 2-1-3.Check of Input Signal ······················································7-1 2-1-4.Alignment Tape ·······························································7-2 2-1-5.Specified Input -Output Level and the Impedance··········7-2 2-1-6.Adjustment Procedures···················································· 7-2 2-2. Video-CD Color-Bars Mode············································7-2

— 4 —

SERVICE NOTE

VHS

1. REMOVAL OF DRUM ASSEMBLY (Fig.1.)

1) Remove the screw 1 (P3×8)

2) Remove the shaft ground assembly 2.

3) Remove three screws 3 (P3×6).

4) Remove the drum assembly 4.

Note: When attaching the drum assembly, be careful not to blur the

contacting surface with fingerprint or like. When attaching the shaft ground assembly, be careful not apply force to the spring section of it.

shaft ground assembl

screw

(P3

drum assembly

SLV-7700KME/7700KML

screw (P3 × 8)

shaft ground assembl

solders

three screws

(P3

Fig. 1.

2. UPPER DRUM REPLACEMENT

2-1. Removal of Upper Drum (Fig. 2.)

1) Remove the screw 1 (P3×8).

2) Remove the shaft ground assembly 2.

3) Completely remove the rotary upper drum board and desolder the soldering indicated by the arrows. (16 points)

4) Remove the screws 3 (PSW 3 ×8) and tape out the rotary upper drum assembly in the direction of arrow. (See Fig. 3.) If it is difficult, remove by shaking the rotary upper drum gradually.

Note: If the drum can not be removed, check whether the solders ha ve

been removed or mot again.

solders

Fig. 2.

Note: When inserting the rotary upper drum assembly into the lower

drum, be careful not to blur the contacting surface with fingerprint or like.

2) If it is difficult, mount the upper drum by shaking it gradually.

Note: Be careful not to damage the head. Make sure that the upper

drum is tightly inserted.

3) Tighten two screws 3 (PSW 3×8). (See Fig. 3.)

Note: Temporary tighten two screws, After making sure that upper

drum is tightly inserted, tighten the screws.

two screws

(PSW3 × 8)

rotary upper drum assembly DZR-68-R

2-2. Mounting Upper Drum

1) Mount the rotary upper drum assembly by aligning marked b with marked of rotary transformer board (lower drum) so that the screw holes of both upper and lower drums match.

rotary transformer board

Fig. 3.

— 5 —

4) Solder 16 points on the rotary upper drum board. (See Fig. 2.)

5) Fix the shaft ground assembly 2 using the screw 1 (P3×8) so that the protrusion of the shaft ground assembly end contacts the center of the drum shaft, (See Fig. 2.)

Note: When attaching the shaft ground assembly, be careful not to

apply force to the spring section of it.

6) Tighten the screw 1 (P3×8). (See Fig. 2.)

3. PERIODIC CHECK AND REPLACEMENT

(Refer to the VHS MECHANICAL ADJUSTMENT (H MECHA) MANUAL.)

In order to obtain the best performance from this unit and make full use of its capabilities, and to extend the life of the unit and tapes, it is recommended that the following periodic checks and maintenance be performed.

• The following must be done after every repair reg ardless of how

many hours the user has operated the machine.

3-1. CLEANING OF ROTATING HEAD DISK ASSEMBLY

1) Press a chamois cloth which has been dipped in cleaning fluid lightly against the rotating drum assembly, then do the cleaning by slowly rotating the rotating head disk by hand. (Nev er try to clean by using the motor to turn it.)

2) Never try to clean by moving the chamois cloth at a vertical angle to the head tip. There is a very great danger of damaging the head tip if this is done.

3-2. CLEANING OF THE TAPE MOVEMENT SYSTEM

1) Clean the surfaces which the tape contacts during its movement (tapeguide, drum assembly surface, capstan, pinch roller, etc.) with a chamois cloth that has been dipped in cleaning fluid.

3-3. CLEANING THE DRIVE SYSTEM

1) Clean the driving parts with a cloth that been dipped in cleaning fluid.

No.4 guide (TG4)

No.3 guide (TG3)

FE head

No.2 guide (TG2)

No.1 guide (TG1)

No.0 guide (TG0)

No.5 guide (TG5)

No.6 guide (TG6)

ACE head

No.7 guide (TG7)