Panasonic SL-CT520EB User manual

AD0504046AE
PortableCD Player
SL-CT520GK / SL-CT520GT
Colours
(A)...........Blue Type
(P)...........Pink Type [SL-CT520GKonly]
(S)...........Silver Type
(Y)...........Yellow Type [SL-CT520GKonly]
Please use thismanual together with the service manual for Model
No. SL-CT520EB/EG/EE/SG, Order No. AD0502004C0.
2005 Matsushita ElectricIndustrial Co., Ltd. All rights reserved.
Unauthorized copying and distribution isaviolation of law.
1
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1. Note
-Thissimplified service manual isprovided to indicate the
differences between the original model No. SL-CT520SG-S and the
subsequent model No. SL-CT520GK-A/P/S-Y, SL-CT520GT-A/S.
2. Replacement Parts List
Note:
-Important safetynotice:
Components identified bymark have special characteristics
important for safety.
Furthermore, special parts which have purposes of fire-retardant
(resistors), high-qualitysound (capacitors), low-noise (resistors),
etc. are used.
When replacing anyof components, be sure to use only
manufacture’sspecified parts showninthe parts list.
-The parenthesized indications inRemarks columns specifythe
areas and colours.
(A): Blue Type
(P): Pink Type
(S): Silver Type
(Y): Yellow Type
2
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-All parts are supplied bySPC.
Ref.No. Change of Parts No. Part Name & Description Pcs
Remarks
SL-CT520SG-S SL-CT520GK
CABINETPARTS
13 RGN2805-H RGN2810-H1 NAME PLATE 1
ACCESSORIES
A2 L0BAB0000190 L0BAB0000183 STEREO EARPHONES 1
A3 N2QCBD000048 N2QCBD000049 WIRED REMOTE CONROL 1
A5 RFEA444Z-S RFEA473T-1S AC ADAPTOR 1
A6 RQT7819-Z ------ OPERATING INSTRUCTIONS 1
DELETE
A7 K2DA42E00001 ------ POWER PULG ADAPTOR 1
DELETE
PACKING MATERIALS
P2 RPK2325 RPK2236 GIFT BOX 1 (
S)
P2 RPK2325 RPK2287 GIFT BOX 1 (
A)
P2 RPK2325 RPK2288 GIFT BOX 1 (
P)
P2 RPK2325 RPK2289 GIFT BOX 1 (
Y)
P3 RPQ1849 RPQ1848 PAD 1
Ref.No. Change of Parts No. Part Name & Description Pcs
Remarks
SL-CT520SG-S SL-CT520GT
CABINETPARTS
13 RGN2805-H RGN2813-H NAME PLATE 1
ACCESSORIES
A2 L0BAB0000190 L0BAB0000183 STEREO EARPHONES 1
A3 N2QCBD000048 N2QCBD000049 WIRED REMOTE CONROL 1
A5 RFEA444Z-S RFEA439G-U AC ADAPTOR 1
A6 RQT7816-B RQT7820-K OPERATING INSTRUCTIONS 1
CHINESE
A6 RQT7817-K ------ OPERATING INSTRUCTIONS 1
DELETE
A6 RQT7819-Z ------ OPERATING INSTRUCTIONS 1
DELETE
A7 K2DA42E00001 ------ POWER PULG ADAPTOR 1
DELETE
PACKING MATERIALS
P2 RPK2325 RPK2233 GIFT BOX 1 (
S)
P2 RPK2325 RPK2266 GIFT BOX 1 (
A)
P3 RPQ1849 RPQ1850 PAD 1
F0504KH
3
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©2005 Matsushita Electric Industrial Co., Ltd. All
rights reserved. Unauthorized copying and
distribution is a violation of law.
SL-CT520EB
SL-CT520EG
SL-CT520EE
SL-CT520SG
Colours
(A)...........Blue Type
(P)...........Pink Type [SL-CT520SG only]
(S)...........Silver Type
(Y)...........Yellow Type [SL-CT520SG only]
Portable CD Player
AD0502004C0

1 Accessories 3
2 Location of Controls 3
3 Precaution of Laser Diode 4
4 Handling Precautions for Traverse Deck 5
4.1. Handling of traverse deck (optical pick-up) 5
4.2. Caution when replacing traverse deck 5
4.3. Grounding for electrostatic breakdown prevention 5
5 Operation Checks and Component Replacement Procedures
6
5.1. Checking for the P.C.B. 6
5.2. Replacement for the CD lid unit, open spring 1, open
spring 2 and retainer plate 7
5.3. Replacement for the traverse motor 8
5.4. Replacement for the optical pick-up 9
5.5. Replacement for the rest switch 10
6 Display of Self-Diagnostic Function 11
7 Checking the Operation Problems on the Traverse Deck
(Optical Pick-up) 12
7.1. Check the operations described below on the traverse
deck after replacing 12
8 Automatic Adjustment Results Display Function (Self-Check
Function) 13
8.1. How to display automatic adjustment results 13
8.2. Display of automatic adjustment results (Self-Check
Function) 13
9 Type Illustration of ICs, Transistors and Diodes 14
10 Schematic Diagram Notes 14
11 Schematic Diagram 15
12 Printed Circuit Board and Wiring Connection Diagram 19
13 Block Diagram 21
14 Terminal Function of ICs 23
14.1. IC301(C2BBGF000595): System Control 23
14.2. IC501(MN6627962JB): Servo Amp, Servo Processor,
Digital Signal Processor, Digital Filter & D/A Converter 23
15 Supply of Rechargeable Battery as Replacement Parts 25
16 Caution in use of Rechargeable Battery 25
17 Replacement Parts List 26
18 Cabinet Parts Location 29
19 Traverse Unit Parts Location 30
20 Packaging 31
CONTENTS
Page Page
2
SL-CT520EB / SL-CT520EG / SL-CT520EE / SL-CT520SG

· AC adaptor for SL-CT520EB
(RFEA435B-S)................................................1 pc.
· AC adaptor for SL-CT520EE/EG
(RFEA431E-S)................................................1 pc.
· AC adaptor for SL-CT520SG
(RFEA444Z-S)................................................1 pc.
· Stereo earphones except for SL-CT520SG
(L0BAB0000183)...........................................1 pc.
· Stereo earphones for SL-CT520SG
(L0BAB0000190)...........................................1 pc.
· Wired remote control except for SL-CT520SG
(N2QCBD000049).........................................1 pc.
· Wired remote control for SL-CT520SG
(N2QCBD000048).........................................1 pc.
· External battery case
(RFA2666-H)..................................................1 pc.
· Rechargeable batteries (with case) for SL-CT520EE only
(RFKHHR4AGE)............................................2 pcs.
· Rechargeable batteries (with case) for SL-CT520SG only
(RFKHHR4AGTB)..........................................2 pcs.
· Power plug adaptor for SL-CT520SG only
(K2DA42E00001)...........................................1 pc.
1 Accessories
2 Location of Controls
Battery
compartment
Lens
Headphone jack (A)
Open
Play/Pause
Stop/Turn off
Battery case terminal
DC IN jack
Charge lamp
C
AB
Play/Stop/Turn off
Earphones
Display panel
Equalizer
Mode
Memory/Recall
Volume control
B
Skip/Search
A
Hold
C
3
SL-CT520EB / SL-CT520EG / SL-CT520EE / SL-CT520SG

3 Precaution of Laser Diode
4
SL-CT520EB / SL-CT520EG / SL-CT520EE / SL-CT520SG

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 to apply 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.)
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. 4-2.
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).
4 Handling Precautions for Traverse Deck
5
SL-CT520EB / SL-CT520EG / SL-CT520EE / SL-CT520SG

· 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.
5 Operation Checks and Component Replacement
Procedures
6
SL-CT520EB / SL-CT520EG / SL-CT520EE / SL-CT520SG

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.
5.2. Replacement for the CD lid
unit, open spring 1, open
spring 2 and retainer plate
· Follow the (Step 1) -(Step 4) of item 5.1.1.
7
SL-CT520EB / SL-CT520EG / SL-CT520EE / SL-CT520SG