Panasonic SA-AK640E - Service Manual

ORDER NO. MD0601012C2
CD Stereo System
SA-AK640E / SA-AK640EB / SA-AK640EG
Colour
(S)... Silver Type
Notes: This model’s CD mechanism changer unit is CRS1. Please refer to
the original Service Manual (Order No. MD0509368C0) for this mechanism.
SPECIFICATIONS
Specifications
1

Summary

AMPLIFIER SECTION

FM;AM TUNER, TERMINALS SECTION

CASSETTE DECK SECTION

DISC SECTION

GENERAL

SYSTEM

1. Safety Precautions

1.1. General Guidelines

Basic safety procedures and recommendations for service personnel.

1.2. Caution for AC Mains Lead

Specific safety advice regarding the AC power cord and its handling.

1.3. Before repair and adjustment

1.4. Protection Circuitry

2. Prevention of Electro Static Discharge (ESD) to Electrostatically Sensitive (ES) Devices

3. Handling Precautions For Traverse Deck

4. Precaution of Laser Diode

5. Handling the Lead-free Solder

5.1. About lead free solder (PbF)

Details on identifying and handling lead-free solder.

6. New Features

6.1. CRS1 Mechanism Overview

An overview of the CRS1 CD changer mechanism's design and functionality.

6.1.2. Hardware composition

6.1.3. Mechanism Operation

6.2. Music Port

7. Accessories

8. Operating Instructions Procedures

9. Self diagnosis and special mode setting

9.1. Special Mode Table

A table detailing various special modes, their descriptions, and key operations.

9.2. Error code Table

10. Assembling and Disassembling Procedure.

10.1. Caution

General cautions and warnings to be observed during disassembly and servicing.

10.2. Disassembly flow chart

10.3. Main Parts Location

10.4. Disassembly of Top Cabinet

10.5. Disassembly of Rear Panel

10.6. Disassembly of CD Changer Unit (CRS1)

10.7. Disassembly of Main P.C.B.

10.8. Disassembly of Transformer P.C.B.

10.9. Disassembly of Power P.C.B.

- Replacement of the Power Amp IC or Voltage Regulator

Procedures for replacing specific components on the power PCB.

10.10. Disassembly of Front Panel Unit

10.11. Disassembly for Panel P.C.B.

10.12. Disassembly of Deck mechanism unit

10.13. Disassembly of Deck P.C.B.

10.14. Disassembly of Traverse Unit

- Assembly of Traverse Unit

10.15. Disassembly of optical pickup unit (CD mechanism)

10.16. Disassembly of Deck Mechanism

10.16.1. Disassembly of the pinch roller ass’y and head block

Steps for removing the pinch roller and head block assembly.

10.16.2. Disassembly of capstan motor ass’y, capstan belt A, capstan belt B and winding belt

10.17. Replacement for cassette lid

10.18. Rectification for tape jam problem

11. Service Fixture and Tools

12. Service Positions

12.1. Checking and Repairing of Main P.C.B.

Procedures for checking and repairing the main printed circuit board.

12.2. Checking and Repairing of Transformer P.C.B.

12.3. Checking and Repairing of Panel, Deck & Deck Mechanism P.C.B.

12.4. Checking and Repairing of Power P.C.B.

13. Adjustment Procedures

13.1. Cassette Deck Section

Procedures for adjusting the cassette deck section.

13.1.1. Tape Speed Adjustment (Deck 1;2)

13.1.2. Bias Voltage Check

13.1.3. Bias Frequency Adjustment (Deck 1;2)

13.2. Tuner Section

13.2.1. AM-IF Alignment

Steps for performing the AM Intermediate Frequency alignment.

13.2.2. AM RF Adjustment

13.2.3. Adjustment Point

14. Voltage and Waveform Chart

14.1. CD Servo P.C.B. & Main P.C.B.

Voltage and waveform data for CD servo and main PCBs.

14.2. Power P.C.B. & Transformer P.C.B.

Voltage and waveform data for power and transformer PCBs.

14.3. Waveform Chart

Specific waveform examples for reference during servicing.

15. Wiring Connection Diagram

16. Block Diagram

17. Schematic Diagram

17.1. Notes of Schematic Diagrams

Important notes and disclaimers regarding the schematic diagrams.

17.2. (A) CD Servo Circuit

17.3. (B) Main (Tuner) Circuit

17.4. (B) Main Circuit

17.5. (C) Panel Circuit

17.6. (D) Transformer Circuit

17.7. (H) Power Circuit

17.8. (F) Deck Circuit & (G) Deck Mechanism Circuit

18. Printed Circuit Board

10 Schematic Diagram

10.1. CD Loading Circuit

The schematic diagram for the CD loading circuit.

11 Printed Circuit Board

11.1. CD Loading P.C.B.

The layout diagram for the CD loading PCB.

12 Exploded Views

12.1. CD Loading Mechanism

Exploded views of the CD loading mechanism parts.

13 Replacement Parts List

13.1. CD Loading Mechanism Parts List

Specific list of replacement parts for the CD loading mechanism.

13.2. Electrical Parts List

SCHEMATIC DIAGRAM - 7

F DECK P.C.B

Schematic of the deck printed circuit board.

G DECK MECHANISM P.C.B

Schematic of the deck mechanism printed circuit board.

SCHEMATIC DIAGRAM - 6

E POWER P.C.B

Schematic of the power printed circuit board.

SCHEMATIC DIAGRAM - 5

D TRANSFORMER P.C.B

Schematic of the transformer printed circuit board.

SCHEMATIC DIAGRAM - 4

C PANEL P.C.B

Schematic of the panel printed circuit board.

SCHEMATIC DIAGRAM - 3

B MAIN CIRCUIT

Schematic of the main circuit board.

SCHEMATIC DIAGRAM - 2

B MAIN (TUNER) CIRCUIT

Schematic of the main tuner circuit.

SCHEMATIC DIAGRAM - 1

A CD SERVO CIRCUIT

Schematic of the CD servo control circuit.

D TRANSFORMER P.C.B (REPX0518 Q)

A CD SERVO P.C.B (REPX0494 A)

E POWER P.C.B (REPX0533 C)

C PANEL P.C.B (REPX0517 L)

B MAIN P.C.B (REPX0516 W)

F DECK P.C.B (REPX0331 G)

G DECK MECHANISM P.C.B. (REPX0321 A)

PCB layout diagram for the deck mechanism circuit board.

1 Mechanism Overview

2 Mechanism Drive Unit

2.1. Tray Open;Close and Multi-Discs Change operations

Details the functions and operations for tray opening and disc changing.

2.2. Disc Selection operation

2.3. Play;Stop operation

3 Mechanism Operation Description

3.1. General Feature

Basic features and characteristics of the five-disc changer mechanism.

3.2. Hardware composition

Lists and describes the hardware components of the mechanism.

3.3. Mechanism Operation

Explains the different states and operational sequences of the mechanism.

3.4. Switches Chattering Check

3.5. Motor Movement Control

3.6. Plunger Timing Chart

3.7. Initialization of Mechanism Unit.

3.8. Mechanism HOME position

3.9. Mechanism Play Driving position

3.10. Trays Operation

3.10.1. Tray ‘Open’ Operation

Explains the different modes and procedures for opening the disc trays.

3.10.2. Tray Closing Operation

3.11. Drive tray between STOCK and PLAY position

3.12. Selection of Tray by Moving UD base Up;down

3.13. Fail Safe

3.14. Manual Trigger Tray Close

3.15. Changer Error Code

4 Self diagnosis and special mode setting

4.1. Special Mode Table

A table detailing the special modes, their functions, and key operations.

4.1.1. CD changer unit ageing test mode

4.2. Error code Table

5 Troubleshooting Explorer

5.1. Preparation of service jig

Steps for preparing a service jig for unit checks.

5.2. Checking of Changer Unit

Procedures to verify the functionality of the changer unit.

5.3. Setting the trays in STOCK position

Instructions for setting the unit's trays to the STOCK position for service.

6 Flow Chart

6.1. Disassembly Flow Chart

A flowchart detailing the sequence of disassembly steps.

6.2. Assembly Flow Chart

6.3. Disassembly Flow

7 Assembling and Disassembling Procedure.

7.1. Disassembling Procedures

Detailed steps for taking the unit apart.

7.1.1. Disassembly of UD Base Assembly

7.1.2. Disassembly of Disc Trays

7.1.3. Disassembly of CD Loading Unit

7.1.4. Disassembly of CD Loading P.C.B.

7.1.5. Disassembly of Plunger Lever

7.1.6. Disassembly of Motor Unit

7.1.7. Disassembly of Traverse Unit

7.1.8. Disassembly of Limit Spring

7.1.9. Disassembly of Play Lever Spring

7.1.10. Disassembly of Pitch Plate Assembly

7.1.11. Disassembly of UD Rack R

7.1.12. Disassembly of UD Rack L

7.2. Assembling Procedure

7.2.1. Assembly of CD Loading Unit

Instructions for assembling the CD loading unit.

7.2.2. Assembly of Disc Trays

7.2.3. Assembly of UD Base Assembly

7.2.4. Assembly of CD Loading P.C.B.

7.2.5. Assembly of Traverse Unit

8 CRS1 (Changer Unit) Ageing; Reliability

8.1. Equipments

Lists the necessary equipment for performing the ageing and reliability tests.

9 Notes of Schematic Diagram

10 Schematic Diagram

10.1. CD Loading Circuit

The schematic diagram for the CD loading circuit.

11 Printed Circuit Board

11.1. CD Loading P.C.B.

The layout diagram for the CD loading PCB.

12 Exploded Views

12.1. CD Loading Mechanism

Exploded views of the CD loading mechanism parts.

13 Replacement Parts List

13.1. CD Loading Mechanism Parts List

Specific list of replacement parts for the CD loading mechanism.

13.2. Electrical Parts List

Panasonic SA-AK640E Specifications

General

Brand	Panasonic
Model	SA-AK640E
Category	Stereo System
Language	English