Technics SLCH 505 Service Manual

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ORDER NO. AD930722OCS

Service Manual

@COMPACT Compact Disc Player Compact Disc Player
MAS H *
DIGITAL AUDIO Mum :xago noise limping
Colour
ST-CHSDS (K) . . . . Black Type
. or
fi9m09_°°""°' SL-CHSOS ST-CH707
Transmmer - Area
33$; :5; Area Colour
Europe, Asia, Latin
America, Middle Near
(E) East, Africa and (K)
Oceania

SB-CH404 RS-CH404 SE-CH404 SB-CH404

System: SC-CH404

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

TRAVERSE DECK: RAE0111Z'MECHANISM SERIES

Specifications
I Audio Notes:
DA converter 1 bit 2 DAC MASH 1. Weights and dimensions shown are approximate.
2. Design and specifications are subject to change
I Pickup without notice.
Wavelength 780 nm *1
Laser power No hazardous radiation is emitted MASH isa trademark of Nl'l'.
(with safety protection).
I General
Dimensions (WXHXD) 270x89.0x262 mm
Weight 1.9 kg
System Tuner Compact disc player Amplifier Cassette deck Speakers
secmm «Egg? SL-CH505 SE~CH404 RS-CH404 "SB-CH404

Notes: For Europe and Oceania
For Asia. Latin America, Middle Near East and Africa
For Europe. .Made In PAES
For ASIa Latin America Middle Near East, Africa and Oceania .Made In NABEL

Technics

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SL-CH505

I Contents _

' ' Page
OHANDLING PRECAUTIONS FOR TRAVERSE DECK ...... 2 DPRINTED CIRCUIT BOARD DIAGRAM .. ,
IPRECAUTION OF LASER DIODE . OWIRING CONNECTION DIAGRAM .
CLOCATION OF CONTROLS ..... OTROUBLESHOOTING GUIDE
.LISTENING TO COMPACT DISCS ONEW DIGITAL SERVO CIRCUIT
IDISASSEMBLY INSTRUCTIONS . . . OFUNCTION OF 10 TERMINALS . .
IBLOCK DIAGRAM ..................... OREPLACEMENT PARTS LIST
oMEASUREMENTS AND ADJUSTMENTS ICABINET PARTS LOCATION IIIII
OSCHEMATIC DIAGRAM ................... OLOADING UNIT PARTS LOCATION .....

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). Variable FBSISOF

(Do not turn)
\

OHandllng of traverse deck (optlcal 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 ol the laser diode, an anti-static
shorting pin is inserted into the flexible board (FPO board).

When removing or connecting the short pin. finish the job in as FPO

short time as possible. (Handle it carefully)
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

already been adiusted. Be sure to short this portion
OGroundlng tor electrostatic breakdown (Use the shorting pin or clip)

prevention

1. Human body grounding
Use the anti-static wrist strap to discharge the static electricity
lrorn your body.
2. (Work table grounding
Put a conductive 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. 80. take care not to let your clothes touch the traverse
deck (optical pickup).

Wrist strap
(Anti- tic bracelet)

Iron plate or some metals
to conduct electricity

I Precaution of Laser Diode

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 optical pick up 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 pick up lens for a long time.

ACHTUNG: Dieses produkt enthalt eine laserdiode. Im eingeschalteten zustand wird unsichtbare laserstrahlung von dEr Iasereinheit abgestrahit.

Wellenlénge: 780 nm
Maximale strahlungsleistung der Iaserinhelt: 100 uW/VDE

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

Die lasereinheit nicht zerlegen, da die strahlung an der freigelegten Iaserdiode gefahriich ist.
Den werksseitig justierten einstellregler der lasereinreif nicht verstellen.

Nicht mit optischen instrumenten in die fokussierlinse blicken.

Nicht uber tangere zeit in die fokussierlinse blicken.

PQNT