Technics SLEH 500 Service Manual

Page 1

ORDER NO. ADQBOZOZOCB

Service Manual

Compact Disc Player

flaw... MASH... may SL-EHEOO

I] multistage noise shaping
DIGITAL Aunio COIOU"
(H) ........ Gray Type
" *2 SB-EH600 *2 SB-EHSOO
Area
(E) ........ Europe, Russia, Asia,
l Latin America, Middle
SL-EHSOO SH-EH5DO East and Africa.
System sc-EI-Isoo
Sound Processor SH-EH500
Tuner / Amplifier SA-EHSOO
fl , CD Player SL-EHSOO
ns-Ei-isoo SA-EHsoo RemoteFOMwl Cassette Deck HeEHeoo
Tr ansmltter From Speakers2 SB-EHGOO

*1 : MASH is a trademark of NTT
*2 : Made in PAES

Because of unique interconnecting cables, when a component
requires service, send or bring in the entire system.

RAE01522 MECHANISM SERIES

Specifications
Audio Section General
No. of channels : 2 (left and right, stereo) Dimensions : 287(W) x 89(H) >< 273(0) mm
0 Wow and flutter : Below measurable limit Weight : 1.6 kg
Digital filter : 8 is
DA converter : 1 bit DAC MASH Notes :Specifications are subject to change without notice.

Weight and dimensions are approximate.
Pickup Section
\ Wavelength : 780 nm

AWARNING

This service information is designed tor 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.

© 1998 Matsushita Electric industrial Co, Ltd.

. ® All rights reserved. Unauthorized copying
ec nlcs and distribution is a violation of law.

Page 2

SL-EHsoo I
' l Contents

Handling Precautions for Traverse Deck .
Precaution of Laser Diod
Location of Controls
Operation Checks an

Main Component Replacement Procedures
To Supply Power Source .
To Check Signals ......
Error Code Display and Servo Adjustment Function .
Schematic Diagram

.. Printed Circuit Board Diagram .................
2, 3 Type Illustration of lCs, Transistors and Diodes
3 Wiring Connection Diagram ...........................
Block Diagram ........
Terminal Function of [C s .
Troubleshooting Guide ..
Replacement Parts List.
Cabinet Parts Location ..
Loading Unit Parts Location

NOTE:
Refer to the service manual for Model No. SA-EH500 for information on Accessories", Connections", Installation , and
Packaging".

CAUTION:

THIS PRODUCT UTlLlZES A LASER

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

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 FFC b°afd
extremely sensitive to electrical shock. (Handle " careiully)
2. To protect the laser diode against electrostatic breakdown, short the flexible
board (FFC board) with a clip or similar object.
5. Take care not to apply excessive stress to me flexible board (FFC board).
4. Do not turn the Variable resistor (laser power adjustment). It has already been Short oint
adjusted.

Lens (Do not touch)

O Grounding for electrostatic breakdown prevention _
1. Human body grounding "PHIL.

Use the anti-static wrist strap to discharge the static electricity from your body. I g l
2. Work table grounding LUJ

/ .
Variable resistor
(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. N°'@(GND) pl _N°'@(Lm p'"
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).

Wrist strap
(Anti-static bracelet) /

on plate or some metals to
conduct electricity

Caution when Replacing the Traverse Deck: 1 M9

The traverse deck has a short point shorted with solder to protect the laser
diode against electrostatic breakdown. Be sure to remove the solder from the
short point before making connections.

I Precaution of Laser Diode

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

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

ACHTUNG:- Dieses produkt enth'alt eine laserdiode. lm eingeschalteten zustand wlrd unsichtbare laserstrahlung von der lasereinheit
adgestrahit.
, Wellenlange: 780 nm
3 Maximale strahlungsleistung der Iaserinhelt 100 ILWNDE

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

1 Die lasereinheit nicht zerlegen, da die strahlung an der freigelegten laserdiode gefahrilch ist.
- 2. Den werksseitig justierten einstellregler der lasereinrelt nicht verstellen.
- 3. Nicht rnit optischen instrumenten in die fokussierlinse blicken
I' 4'. Nicht uber Iangere zeit in die fokussierlinse blicken.

-2-

Page 7

SL-EH50077

Release the 2 claws.

Pull out the disc trayi ( }

Remove the
connector.

connector

Unsolder
Caution:

insert a short pin into the traverse
unit FFC board.

(Refer to Hnading Precautions for
Traverse Deck on page 2.)

FFC board
FFC board
Short pin
(9 l
1 Widen the boss using 2. Pull out the pin in
a regular screwdriver. the direction of the
arm-w Rises? f'
Screwdriver Pullout [ 1
Boss the pin. ~
Spring(Silver) if Spring(Silver)
4,, :

Spring(Red)

Release the claw.
NOTE

Be careful not to lose the 3 springs

because those will also be removed

on removal of the traverse unit assy.