Technics SLCH 570 Service Manual

Page 1

ORDER NO. AD9603052C8

Service Manual

Compact Disc Player Compact DISC Player

@Ungfi DIEIT/IL MASH SL'CH57O

D'G'TN-UDID mum-stage noise 'simping
Colour
*2 *3 SB-CH570 *2. *3 SB-PCS70 *z *3 SB-CH57O
, i (K) : Black
SL-CH57O sun-r57
7 ~ v Areas
*2 SB-P557O . r *2 SB-PSS70
or . Suffix for v
)3 Area Colour
35343510 I Model No.
, Europe, Asia, Latin
M M g (E) America Middle East. (K)
RS«CH770 SE-CH570 Remote Control Africa and Oceania
Transmitter
Note: The design of SB-PSt O is differ from the above picture
Because of unique interconnecting cables, when a component _
[requires service, send or bring in the entire system. SVStem' SC CH570
v RAE01502 MECHANISM SERIES
Specifications
I Audio Notes:
. S ecifications are heat to ch w'th t notic .
DA converter 1 bit 2 DAC MASH"1 p. . S. J any? ' W 9
Weight and dimensmns are approx1mate.
I Pickup
Wavelength ' 780 nm
*1 MASH is a trademark of NTT.
I General -
Dimensions (WxHx D) 27Dx89x272 mm
Weight 15 kg
Tuner/sound Compact disc .
System processor player Amplifier Cassette deck Front speakers Center speaker Surround speakers
*ZSB~PT57O
sc-cn57o ST-CH570 SL-ci-i51o SE-CH57O RS-CH77O *2-*sse-CH570 *ZSB'PCWO I *ZSB'PSWO
*3 SB-PT570A
SB-P0570 I *asa-Psm
*2 For Europe area: ,,,,,,,,,,,,,,,,,, Made in PAES

*3 Except for Europe area : ..... Made in NABEL

AWARNiNc
This service information is designed for experienced repair technicians only and is not designed for use by the general public. It does not
contain warnings or cautions to advise non-technical individuals of potential dangers in attempting to service a product.
Products powered by electricity should be serviced or repaired only by experienced professional technicians Any attempt to service or
repair the product or products dealt with in this service information by anyone else could result in serious injury or death,

© 1996 Matsushita Electric Industrial Co, Ltd.

0 ®
All rights reserved. Unauthorized copying
r C I I 108 and distribution is a violation of law.

Page 2

SL-CH570

I Contents

Handling Precautions for Traverse Deck
Precaution of Laser Diode .
Location of Controls

Page
, 16~18

.. , Printed Circuit Board Diagram
2, 3 Wiring Connection Diagram
3 Function of lC Terminals

. 22, 23

Listening to Compact Iscs , 2 Block Diagram ...........

Operation Check and Troubleshooting Guide 24, 25
Main Component Replacement Procedures ,. 4~5 Replacement Parts List . 26~28

Automatic Adjustment Results Display Function. 9 Cabinet Parts Location . 29

To Supply Power Source 10 Loading Unit Parts Location 30

Schematic Diagram . 11I~15
NOTE: 1
Refer to the service manual for Model No. SE-CH570 (ORDER No. AD9603054C8) for information on Accessories",
Stacking the Components", Connections and Packaging". '

CAUTION:

THIS PRODUCT UTILIZES A LASER.

USE OF CONTROLS OR ADJUSTMENTS OR PERFORMANCE OF PROCEDURES OTHER THAN THOSE
SPECIFIED HEREIN MAY RESULT IN HAZARDOUS RADIATION EXPOSURE I

I 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).

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 protect the laser diode against electrostatic breakdown, short the
flexible board (FFC board) with a clip or similar object.

3. Take care not to apply excessive stress to the flexible board (FFC Shortpoint
board),

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

FFC board :Lens (Do not touch)

(Handle it carefully)

ready been adjusted.
O Grounding for electrostatic breakdown prevention 7-9531
1. Human body grounding ' f E 1
Use the anti-static wrist strap to discharge the static electricity from L____.'
your body. Variable resistor

2. Work table grounding (Do not turn)
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). . .
Caution when Replacing the Traverse Deck:
The traverse deck has a short point shorted with solder to protect the laser diode againstelectrostatic breakdown. Be sure to remove the solder from
the short point before making connections.

I Precaution of Laser Diode

CAUTION: This product utilizes a laser diodewith the unit turned "on", invisible laser radiation is emitted from the pick up lens.
Wave length: 780 nm
Maximum output radiation power from pick up: 100 uWNDE

Wrist strap
(Anti-static bracelet) /

Iron plate or some metals to
conduct electricity

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. ltwas already adjusted.

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

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

ACHTUNG: Dieses produkt enthalt eine laserdiode. Im eingeschalteten zustand wird unsichtbare laserstrahlung von der lasereinheit
adgeslrahit.
Wellenlange: 780 nm
Maximale slrahlungsleistung der laserinhelt: 100 [JWNDE

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

1. Die lasereinheit nicht zerlegen, da die strahlung an der freigelegten laserdiode gefahriichist.
2. Den werksseitig justierten einstellregler der lasereinreit nicht verstellen.

a. Nicht mit optischen instrumenten in die fokussierllnse blicken.

4, Nicht fiber langere zeit in die fokussierlinse blicken.

_2-