Technics SLCH 550 Service Manual

Page 1

0H0 ER NO A09208264C8

Service Manual

DIGITAL AUDIO

MASH

mummy]: no, shaping

Remote control

Compact Disc Player

SB-C H 550

SL-CHSSO

|
FIS-CHSSO

transminev

SH-CHSSO

SAeCHESO

Compact Disc Player

SL-CH550

SEl-CH550

Colour
Kl. . BIackType
Area
Suflix lot . , l,
Model No Area COIOLA
I ( Europe. Asia. Latln
America Middle Near
, .
IE) 1 EastlAlnca and (KI
Oceania

System: SC-CHSSO

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

NEW TRAVERSE DECK (RAE0111Z)lRelerto page24)

SPECIFICATIONS

(um 45 500)

I AUDIO
Frequency response
Wow 5 Flutter

I PIC K U P
Wavelength

I GENERAL
Dimensions (WXH X D)
Weight

2720000141. :1 (18
Below measurable Ilmil

780 nm

27OXBSA5>< 257 mm
2 1 kg

Notes:

1. Specifications are sublecl to change wllhoul notice.

2 Weight and dtmenstons are approximate,

3. Total harmonic distortion is measured by the digital spectrum
analyzer

OTechnics (or Panasonic) developed the world's first MASH
type DAC and A00 MASH technology was invented by
NTT (LSI Labs)

«MASH is a trademark at NTT,

System

Sound processor lunar ampliller

c 7 _,__Tiv___ a, i
J Cassette deck Speakers
7 a

I Compacldlsc player

SC-CHSSO

SH-CH550 SAVCHSSO

Technics

SL-CHbSO

RS~CH550

SB-CHSSO-I

"Europe area...Made In PAES

Page 2

v SL-CHSSO

I CONTENTS

Page Pa e
oHANDLING PRECAUTIONS FOR TRAVERSE DECK .. t 2 INEW DIGITAL SERVO CIRCUIT H .\_ , .. . .._. 294
aPRECAUTION 0F LASER DIODE . . .. . .. . 2 3 OMEASUREMENTS AND ADJUSTMENTS , . t . 24, 25
ILOCATION OF CONTROLS . . . . V . V ,. _, . 3, 4 OFUNCTION OF IC TERMINALS , . , , i i . . 26-28
oDISASSEMBLV INSTRUCTIONS . . _ . ., . _ 5~ 12 OTROUBLESHOOTING GUIDE , . i . ,,,,,,, _ . , _ A, 29, 30
IDESCRIPTION OF FL PANEL . . . . . . . .. 13 'BLOCK DIAGRAM . r r ,. ,. _ t. . 31~34
ISCHEMATIC DIAGRAM .. . .. H ..t A I4~19 OREPLACEMENT PARTS LIST 7 t H t . 3538. 40\4t
IPRINTED CIRCUIT BOARD DIAGRAM . , . _ , 2022 'CASINET PARTS LOCATION __________ t , ..... 39

IWIRING CONNECTION DtAGRAM r t...r r . ...... 23 OLOADING UNIT PARTS LOCATION . . . t. ,.. , 42

I HANDLING PRECAUTIONS FOR TRAVERSE DECK

The laser diode in the traverse deck (optical pickup) may break down due to potential dillerance caused by static electricity ol clothes or
human body
So. be careIul OI electrostatic breakdown during repair at the traverse deck (optical pickup) Variable TGSSIQ'
(Do not turn)

OHandllng oi traverse deck (optlcal pickup) K
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 ot the laser diode, an antistatic

shoning pin is inserted into the flexible board (FPO board)
When removing or connecting the short pin iinish the Job in as FPO Y
short time as possible. (Handle it Catetullyt
3. Take care not to apply excessive stress to the flexible board (FPO \
board). {"3}-
4. Do not turn the variable resistor (laser power adiuslrnentl It has /.\ )7
already been adjusted. Be sure to short this portion
0 Grounding for electrostatic breakdown lUse the shorting pm 0! clip)
prevention

1. Human body grounding snorting pin

Use the anti-static wrist strap to discharge the static electricity
train your body
2. Work table grounding
Put a COnrtuclive material (sheet) or slael sheet on the area where
the traverse deck (optical pickup) is placed. and ground the sheet,
Cautlan:
The static electricity at yourclcthes will not be grounded through the
wrist strap 80 take care not to let your clothes touch the traverse

deck topticat pickup) \ /
1

Wristslmc
(AI'lhI-Jtt hm]: tIlTI

Iron nlats :ir some metals
in canduu crummy

I PRECAUTION OF LASER DIODE

CAUTION: This product utilizes a laser diode with the unit turned "oni invisible laser radiation l5 emitted (rent the pick up lens.
Wavelength 780 rim
Maximum output radiation power from pick up' too uwNDE

Laser radiation train the pick up lens rs safety level. but be sure the tollowings-

1 Do not disassemble the optical pick up unit. since radiation lrom exposed laser diode is dangerous.
2. Do not adjust the variable resrstor on the pickup unit It was already adiusted.

3, Do not lock at the locus lens using optical instruments

4. Recommend not to lock at pick up lens tor a long lime.

ACHTUNG: Dieses produkt enlhiitl sine lasermode, lrn singeschatteten zustand erd unsichtbare laserstrahlung von cler tasereinhait abgestrahrt.

Wetlentanga 780 nm
Maximate strahlungsleistung der Iaserornheit too uWNDE

Die strahlung an der Iasereinhett isl ungetahrlich, wenn lolgende punkta beachlet werden:

Die lasereinhert nicht lerlegan, da die slrahtung an der lreigelegten laserdicde getahrlrch ist
Den werksserttg tuslicrten einstellregler dar taserernreit ntcht verstellen,

Niel-it mrt optischen instrumenten in die lokussierlinse blicken
Nicht uber tangere zeil in die tokussieninse bticken

AQNA

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