Technics SLPS 670 A Service Manual

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ii

ORDER NO M59410050C2

Service Manual

Compact Disc Player

DIEIT/ IL

@figfi

DIGITAL Auoro MAS H *

mummag. nolso shaplng

RAE11OOZ MECHANISM SERIES

Specifications

I Audio

No. of channels
Frequency response

2 (left and right, stereo)
2 - 20,000 Hz, : 0.5 dB

Output voltage 2 V (at 0 dB)
Dynamic range 98 dB
SIN 107 dB

Harmonlc distortion
Total harmonic dlstortion

0.002% (1 kHz, 0 dB)
0,0027% (1 kHz, 0 dB)

Wow and llutter Below measurable limit
DA converter MASH (1 bit)
Output impedance 600 (2

More than 10 kg
15 mW max. 32 9. (adjustable)

Load Impedance
Headphone output level

I Pickup
Wavelength
Laser Power

780 nm
No hazardous radiation is emitted
(with safety protection)

Compact Disc Player

SL-P867OA

Colour
(K) : Black
Areas
Suffix for
Model No Area Colour
(E) Europe
(EB) Britain (K)
(EG) Germany and ltaly
I General
Power consumption 15 W
Power supply AC 50/60 Hz, 230 - 240 V
Dimenslons (Wx Hx D) 430x114x290 mm
Weight 4.0 kg
Note:

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

For United Kingdom only:
This apparatus was produced to BS 800.

>l<

MASH is a trademark of NTT.

AWARNING
This service intormation is designed for experienced repair technicians only and is 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.

Technicsi

© 1994 Matsushita Electric Industrial Co., Ltd.
All rights reserved Unauthorized copying
and distribution is a violation of law.

Page 2

SL-P867OA
I Contents

Page
O Handling Precautions for Traverse Deck .. 2
O Precaution of Laser Diode 3
OAcoessories . 3
OConnections . a
O Caution for AC Mains Lead 4
0 Location of Controls ........ 5
0 Basic Operating Procedure 6

0 Operation Check and
Main Component Replacement Procedures .
I Block Diagram .............................................

7~18
14.15

0 Schematic Diagram ............
0 Printed Circuit Board Diagram
0 wiring Connection Diagram
0 Troubleshooting Guide
0 Automatic Adjustment Results Display Function.
0 Function of 1C Terminals
0 Replacement Parts List
0 Cabinet Parts Location
0 Loadiong Unit Parts Loca ion

I Handing 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 prevent the breakdown of the laser diode. an anti-static shorting
pin is inserted into the flexible board (FPC 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 (FPC
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).

l Precaution of Laser Diode

Lens (Do not touch)

FPC / " \
(Handle it carefully)

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

Wrist strep
(Anti-static bracelet)

1M0

conduct electricity

CAUTION: This product utilizes a laser diode with 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

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.

a. Do not look at the focus lens using optical instruments.
4. Recommend not to look at pick up lens for a long time.

ACHTUNG: Dieses Produkt enthéit eine Laserdiode, lm eingeschalteten Zustand wird unsichtbare Laserstrahlung von der Lasereinheit

abgestrahlt,
Wellenlange: 780 nm

Maximale Strahlungsleistung der Lasereinheit: 1OO_LLW/VDE

Die Strahlung an der Lasereinheit ist ungetahrlich, wenn folgende Punkte beachtet werden:

1. Die Lasereinheit nicht zerlegen, da die Strahlung an der freigelegten Laserdiode gefahrlich ist.
2. Den werksseitig justierten Einstellregler der Lasereinheit nicht verstellen.
3. Nicht mit optischen lnstrumenten in die Fokussierlinse blicken.

4. Nicht fiber lingere Zeit in die Fokussierlinse blicken.