Panasonic SLSX-450-EB, SLSX-450-EG, SLSX-450-GC, SLSX-450-GN, SLSX-450-EE Service manual

ORDER No.AD050200 6C8

Portable CD Player

SL-SX450EB SL-SX450EE SL-SX450EG SL-SX450GC SL-SX450GN

Colours

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

(A)..................Blue Type (Only SL-SX450EE)

Specification

●●●●Audio(CD-DA)

Sampling frequency: 44.1 kHz

No. ofchannels: 2 (left and right, stereo) Frequencyresponse: 20 to 20,000 Hz

(+0.5dB to -7dB)

Headphone outputlevel: RMS max.6mW+6mW/16Ω

(adjustable)

●●●●Pickup Lightsource: Semiconductor laser Wavelength: 780 nm

●●●●MP3 Supported bit-rates: 32 kbps to 320 kbps

(128 kbps is recommended)

Supported sampling frequency: 48 kHz/44.1 kHz/32 kHz Maximum number ofitems

(total no. of albums and tracks): Maximum album levels: 100

999

●●●●General Power supply: DC input; DC 4.5V

C adaptor input;

(AC adaptor is not included in SLSX450EB. )

Power consumption: (AC adaptor is not included in SLSX450EB. )

UsingAC adaptor; 0.7W Recharging; 3.1W Playtime:

Using on a flat stable surface at 25°C, EQ is off, Hold is on,Anti-skip is on POS 1 (CD-DA), recommended bit rate (MP3: 128 kbps), and the Digital Re-master is off (MP3).Play time are inhoursand approximate.

Batteries used:

EB:AC 220 - 240V 50/60Hz EE: AC 220 - 230V 50/60Hz

EG: AC 220 - 230V 50/60Hz

GC: AC 110 - 127, 220 - 240V

50/60Hz

GN: AC 230 - 240V 50Hz

SL-SX450EB / SL-SX450EE / SL-SX450EG / SL-SX450GC / SL-SX450GN

2 optional alkaline batteries; MP3 disc....85h

CD-DA disc....50h

2 optional rechargeable batteries; MP3 disc....40h

CD-DA disc....23h

Recharging time: 4 to 5 hours

· The playtime maybe less depending on the operating conditions.

· Play time will be considerably reduced when playing CD-RW.

Operational temperature range: 0°C-40°C Rechargeable temperature range: 5°C-40°C Dimensions (WxHxD): 135x23.8x135mm Mass: 202g (with batteries)

158g (without batteries)

Note:

Specifications are subject to change without notice. Mss and dimensions are approximate.

Note on CD-R and CD-RW:

This unit can playCD-R and CD-RW recorded with CD-DA or MP3. Use an audio recording disc for CD-DA and finalize* it when you finish recording. The unit may not be able to play some discsduetothe condition of the recording. *A process performed after recording that enables CD-R/CD-RW players to play audio CD-R and CD-RW.

CONTENTS

Page Page

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

3.1. Handling the traverse deck (optical pickup)

3.2. Caution when replacing traverse deck

3.3. Grounding for electrostatic breakdown prevention

4 Operation Checks and Component Replacement Procedures

4.1. Checking for the P.C.B. ass 馳

4.2. Replacement for the CD lid unit

4.3. Replacement for the LCD, button L, button R and multi button SW unit

4.4. Replacement for the spring holder and open spring

4.5. Replacement for the traverse motor

4.6. Replacement for the optical pick-up

4.7. Replacement for the rest switch

5 Checking the Operation Problems on the Traverse Deck

(Optical Pickup)

6 Automatic Adjustment Results Display Function (Self-check

Function)

6.1. How to display automatic adjustment results

10 10 12

2 3 4

4 4 4

6 8

9 9

6.2. Display of automatic adjustment results (self-check function)

7 Display of Self-Diagnostic Function 8 Type Illustration of ICｴs, Transistors and Diodes 9 Schematic Diagram Notes 10 Schematic Diagram 11 Printed Circuit Board and Wiring Connection Diagram 12 Block Diagram 13 Terminal Function of ICs

13.1. IC101(AN22003A-NF): Servo Amplifier

13.2. IC301(C2BBGE000792): System Control / LCD Drive

13.3. IC501(MN6627935CM):Servo Processor/ Digital Signal Processor/ Digital Filter & D/A Converter

14 Replacement Parts List 15 Cabinet Parts Location 16 Traverse Parts Location 17 Packaging

17.1. SL-SX450EB

17.2. SL-SX450EE/EG/GN

17.3. SL-SX450GC

15 15 16 17 21 23 25

25 25

27 30 31 32

32 33 34

1 Precaution of Laser Diode

CAUTION:

This unit utilizes a class 1 laser. Invisible laser radiation is emitted from the pickup lens when the unit is turned on:

1. Do not look directly into the pickup lens.

2. Do not use optical instruments to look at the pickup lens.

3. Do not adjust the preset variable resistor on the optical pickup.

4. Do not disassemble the optical pickup unit.

5. If the optical pickup is replaced, use the manufactures specified replacement pickup only.

6. Use of control or adjustments or performance of procedures other than those specified herin may result in hazardous

SL-SX450EB / SL-SX450EE / SL-SX450EG / SL-SX450GC / SL-SX450GN

radiation exposure.

CAUTION:

This product utilizes a liser diode with the unit turned “on”, invisible laser radiation is emitted from the pickup lens. Wave length: 780nm Maximum output wadiation power from pickup: 100 µW/VDE Laserradiationfromthepickup lens is safety level, but be sure the followings:

1. Do not disassemble the optical pickup unit, since radiation from exposed laser diode is dangerous.

2. Do not adjust the variable resistor on the pickup unit. It was already adjusted.

3. Do not look at the focus lens using optical instruments.

4. Recommend not to look at pickup lens for a long time.

ACHTUNG:

Dieses Produkt enthalt eine Laserdiode. Im eingeschalteten Zustand Wird unsichtbare Leserstrahlung von der Lasereinheit abgestrahlt. Wellenlage: 780nm Maximale Strahlungsleistung der Lasereinheit: 100 µW/VDE Die StrahlungasderLasereinheitist ungefahrlich, wenn folgende Punkte beachtet werden:

1. Die Lasereinheit nicht zeriegen, de die Strahlung an der freigelegten Laserdiode gefahrlich ist.

2. Denwerkseitig Justierten Einstellregler der Lasereinhit nicht verstellen.

3. Nicht mit optischen Instrumenten in die Fokussierlines blicken.

4. Nicht uber langere Zeit in die Fokussierlines blicken.

2 Accessories

For all areas:

· Stereo earphones..................................................1 pc.

(L0BAB0000182)

For (EE, EG) area:

· AC adaptor...............................................................1 pc.

(RFEA431E-S)

For (GC) area:

· AC adaptor...............................................................1 pc.

(RFEA444Z-S)

· Power Plug Adaptor...............................................1 pc.

(RJP1SG05-Z)

For (GN) area:

· AC adaptor...............................................................1 pc.

(RFEA436A-S)

SL-SX450EB / SL-SX450EE / SL-SX450EG / SL-SX450GC / SL-SX450GN

3 Handling Precautions for Traverse Deck

The laser diode in the traverse deck (optical pickup) 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 pickup).

3.1. Handling the traverse deck (optical pickup)

1. The traverse deck (optical pickup) is an extremely highprecision construction and must not be subjected to impact, excessive vibration, or other types of rough handling.

2. To protect the laser diode against electrostatic breakdown, be sure that the short land A and B 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 intothetip of the flexible board. (Refer to Fig. 1 )

3. Handle the flexible circuit boards with care; excessive force could cause them to be broken.

4. Do not turn the pre-set variable resistor (for adjustment of the laser power); it has been adjusted at the factory.

(as shown in Fig. 1 )

3.2. Caution when replacing traverse deck

The new traverse deck short-circuits by the short pin, the foil (C) 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 (C). (Refer to Fig. 1 ) (Take care not to make contact with cutting point each other.)

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

3.3. Grounding for electrostatic breakdown prevention

1. Human body grounding Use the anti-static wrist strap to discharge the static

electricity from your body. (as shown in Fig. 2 )

2. Work table grounding Put a conductive material (sheet) or steel sheet on the area

where the optical pickup is placed, and fround the sheet. (as shown in Fig. 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 pickup).

Fig. 1

Fig. 2

Fig. 3

SL-SX450EB / SL-SX450EE / SL-SX450EG / SL-SX450GC / SL-SX450GN

4 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.

4.1. Checking for the P.C.B. ass’y

4.1.1. Checking for the P.C.B. ass’y

(A side)

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

SL-SX450EB / SL-SX450EE / SL-SX450EG / SL-SX450GC / SL-SX450GN

4.1.2. Checking for the P.C.B. ass’y (B side)

· Follow the (Step1)-(Step5) of item 4.1.1.

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

SL-SX450EB / SL-SX450EE / SL-SX450EG / SL-SX450GC / SL-SX450GN

4.2. Replacement for the CD lid unit

· Follow the (Step1)-(Step3) of item 4.1.1.

4.3. Replacement for the LCD, button L, button R and multi button SW unit

· Follow the (Step1)-(Step3) of item 4.1.1.

· Follow the (Step1)-(Step5) of item 4.2.

SL-SX450EB / SL-SX450EE / SL-SX450EG / SL-SX450GC / SL-SX450GN

4.4. Replacement for the spring holder and open spring

· Follow the (Step1)-(Step3) of item 4.1.1.

· Follow the (Step1)-(Step5) of item 4.2.

SL-SX450EB / SL-SX450EE / SL-SX450EG / SL-SX450GC / SL-SX450GN

4.5. Replacement for the traverse motor

· Follow the (Step1)-(Step3) of item 4.1.1.

NOTE:

Be sure to confirm the item 3 “Handling Precautions for Traverse Deck” before removing the traverse deck unit.

4.6. Replacement for the optical pick-up

· Follow the (Step1)-(Step3) of item 4.1.1.

· Follow the (Step1)-(Step3) of item 4.5.

SL-SX450EB / SL-SX450EE / SL-SX450EG / SL-SX450GC / SL-SX450GN

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