Panasonic sl pg 570 a service manual

Page 2

SL-PGS70A
I Contents

' Handling Precautions for Traverse Deck
0 Precaution of Laser Diode
0 Accessories.
O Connections
0 Caution for AC Mains Lead
0 Location of Controls .........
0 Basic Operating Procedure
0 Operation Check and

Main Component Replacement Procedures .....
0 Automatic Adjustment Results Display Function.

Page
15~20
21. 22

0 Schematic Diagram ..................................
0 Printed Circuit Board Diagram

0 Wiring Connection Diagram . 23
0 Block Diagram .................. 24. 25
'Troubleshooting Guide. . 26. 27
0 Function of IC Terminals. 28~30
G Replacement Parts List 31 ~37
I Cabinet Parts Location . 34. 35
0 Loadiong Unit Parts Location. . 36
0 Packaging ............................ . 37

I Handing Rrecautions 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).

0 Handling of traverse deck (optical pickup)

1. Do not subject the traverse deck (optical pickup) to static electricity
as it is extremely sensitive to electrical shock.

2. To prevent the breakdown of the laser diode. an anti-static shorting
pin is inserted into the flexible board (FFC board).
When removing or connecting the short pin. finish the job in as short
time as possible.

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 al-
ready been adjusted.

o Grounding for electrostatic breakdown prevention

1, Human body grounding
Use the anti-static wrist strap to discharge the static electricity from
your body.

2. Work table grounding
Put a conducive material (sheet) or steel sheet on the area where the
traverse deck (optical pickup) is placed. and ground the sheet.

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).

I Precaution of Laser Diode

CAUTION:
Wave length: 780 nm

FFC

Lens (Do not touch) .
(Handle It carefully)

Be sure to short this portion
(Use the shorting pin or clip)

Wrist strap
(Anti-static bracelet) '

1M0

n plate crsome metals to
conduct electricity

This product utilizes a laser diode with the unit turned on". invisible laser radiation is emitted from the pick up lens,

Maximum output radiation power from pick up: 100 uW/VDE

Laser radiation from the pick up unit is safety level. but be sure the followings:

1. Do not disassemble the pick up unit. since radiation from exposed laser diode is dangerous,
2. Do not adjust the variable resistor on the pick up unit. it was already adjusted.

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

4. Hecommend not to look at pick up lens for a long time.

ACHTUNG:
adgestrahit.
Wellenlange: 780 nm

Dieses produkt enthalt eine Iaserdiode. lm eingeschalteten zustand wird unsichtbare laserstrahlung von der Iasereinheit

Maximale strahlungsleistung der laserinhelt: 100 uWNDE

Die strahlung an der lasereinheit ist ungefahrllch. wenn folgende punkte beachtet werden:

1. Die lasereinheit nicht zerlegen. da die strahlung an der freigelegten laserdiode gefahriich ist.
2. Den werksseitig justierten einstellregler der Iasereinreit nicht verstellen.
3. Nicht mit optischen instrumenten in die fokussierlinse blicken.

4. Nicht iiber Iéngere zeit in die fokussierlinse blicken.