Panasonic SLCT-820-EB, SLCT-820-EE, SLCT-820-EG Service manual

Portable CD Player

SL-CT820EB SL-CT820EE SL-CT820EG

Colours

(K)...........Black Type

(S)...........Silver Type

AD0502010C2

SL-CT820EB / SL-CT820EE / SL-CT820EG

CONTENTS

Page Page

1 Accessories 3 2 Location of Controls 3 Precaution of Laser Diode 4 Handling Precautions for Traverse Deck

4.1. Handling of traverse deck (optical pick-up)

4.2. Caution when replacing traverse deck

4.3. Grounding for electrostatic breakdown prevention

5 Operation Checks and Component Replacement Procedures

5.1. Checking for the P.C.B.

5.2. Replacement for the CD lid unit, shaft plate, spring A and spring B

5.3. Replacement for the traverse motor and optical pick-up

5.4. Replacement for the rest switch

5.5. Replacement for the spindle motor

6 Display of Self-Diagnostic Function 7 Checking the Operation Problems on the Traverse Deck

(Optical Pick-up)

7.1. Check the operations described below on the traverse deck after replacing

8 Automatic Adjustment Results Display Function (Self-Check 3 4 5

5 5 5

8 9

10 10

Function)

8.1. How to display automatic adjustment results

8.2. Display of automatic adjustment results (Self-Check Function)

9 Type Illustration of ICs, Transistors and Diodes 10 Schematic Diagram Notes 11 Schematic Diagram 12 Printed Circuit Board and Wiring Connectio n Diagram 13 Block Diagram 14 Terminal Function of ICs

14.1. IC301(C2BBGF000650): System Control

14.2. IC501(MN6627961JA): Servo Amp, Servo Processor, Digital Signal Processor, Digital Filter & D/A Converter

15 Supply of Rechargeable Battery as Replaceme nt Parts 16 Caution in use of Rechargeable Battery 17 Replacement Parts List 18 Cabinet Parts Location 19 Traverse Unit Parts Location 20 Packaging

14 14 15 19 21 23

25 25 26 29 30 31

1 Accessories

SL-CT820EB / SL-CT820EE / SL-CT820EG

· AC adaptor for SL-CT820EB

(RFEA435B-S)................................................1 pc.

· AC adaptor for SL-CT820EE/EG

(RFEA431E-S)................................................1 pc.

· Stereo earphones

(L0BAB0000190)...........................................1 pc.

· Wired remote control

(N2QCBD000047).........................................1 pc.

2 Location of Controls

Rechargeable battery compartment

Charge lamp

Open

Hold

Play/Pause

Stop/Turn off

Skip/Search

Lens

Volume control

· External battery case

(RFA2666-H)..................................................1 pc.

· Soft case

(RFC0071A-C)...............................................1 pc.

· Rechargeable batteries (with case)

(RFKFHFAZ01E1).........................................2 pcs.

HighMAT on-off

Optical digital/line out jack

Headphone jack ( )

Battery case terminal

DC IN jack

Display panel

Equalizer

Earphones

Play/Stop/Turn off

Mode

Memory/Recall/Display

SL-CT820EB / SL-CT820EE / SL-CT820EG

3 Precaution of Laser Diode

4 Handling Precautions for Traverse Deck

SL-CT820EB / SL-CT820EE / SL-CT820EG

The laser diode in the traverse deck (optical pick-up) may break down due to potential difference caused by static electricity of clothes or human body.

So, be careful of electrostatic breakdown during repair of the traverse deck (optical pick-up).

4.1. Handling of traverse deck (optical pick-up)

1. Do not subject the optical pick-up to static electricity as it is

extremely sensitive to electrical shock.

2. To protect the laser diode against electrostatic breakdown,

be sure that the short land of the flexible board (FFC board) should be short-circuit by solder before pulling out the FFC. Then inserting a short pin or similar object into the tip of the flexible board. (Refer to Fig. 4-1.)

3. Take care not toapply excessive stress to the flexible board

(FFC board).

4. Do not turn the variable resistor (laser power adjustment). It

has already been adjusted. (Refer to Fig. 4-1.)

4.2. Caution when replacing traverse deck

The new traverse deck short-circuits by the short pin, the foil (B) and short lands to protect the laser diode against electrostatic breakdown. Be sure to replace to new one following procedures.

1. Remove the short pin from the FFC, and then connect it to

the connector.

2. Cut the foil (B). (Refer to Fig. 4-1.) (Take care not to make

contact with cutting point each other.)

3. Unsolder the short lands. (Refer to Fig. 4-1.)

4.3. Grounding for electrostatic breakdown prevention

4.3.1. Human body grounding

Use the anti-static wrist strap to discharge the static electricity from your body. (Refer to Fig. 4-2.)

Fig. 4-1.

Fig. 4-2.

4.3.2. Work table grounding

Put a conductive material (sheet) or steel sheet on the area where the traverse deck (optical pick-up) is placed, and ground the sheet. (Refer to Fig. 4-3.)

Fig. 4-3.

Caution:

The static electricity of your clothes will not be grounded through the wrist strap.

So take care not to let your clothes touch the traverse deck (optical pick-up).

SL-CT820EB / SL-CT820EE / SL-CT820EG

5 Operation Checks and Component Replacement

Procedures

· This section describes procedures for checking the

operation of the major printed circuit boards and replacing the main components.

· For reassembly after operation checks or replacement,

reverse the respective procedures. Special reassembly procedures are described only when required.

5.1. Checking for the P.C.B.

5.1.1. Checking for the P.C.B. (A side)

· Check the P.C.B. (A side) as shown below.

SL-CT820EB / SL-CT820EE / SL-CT820EG

5.1.2. Checking for the P.C.B. (B side)

· Follow the (Step 1) - (Step 5) of item 5.1.1.

· Check the P.C.B. (B side) as shown below.

SL-CT820EB / SL-CT820EE / SL-CT820EG

5.2. Replacement for the CD lid unit, shaft plate, spring A and spring B

5.3. Replacement for the traverse motor and optical pick-up

SL-CT820EB / SL-CT820EE / SL-CT820EG

· Follow the (Step 1) - (Step 4) of item 5.1.1.

SL-CT820EB / SL-CT820EE / SL-CT820EG

5.4. Replacement for the rest switch

· Follow the (Step 1) - (Step 4) of item 5.1.1.

· Follow the (Step 1) , (Step 2) of item 5.3.

5.5. Replacement for the spindle motor

· Follow the (Step 1) - (Step 4) of item 5.1.1.

· Follow the (Step 1) , (Step 2) of item 5.3.

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