Technics SLCH 80 Service Manual

Page 1

ORDER NO MD940403508

Service Manual

[flag-[Ear M ASH .. Tuner/Compact Disc Changer
DIGITAL muse-cum SB cn7s S L' C I I8 0
SB-CHBO SB-CH80
J, J, - Colour
(K) . . . Black Type
Area
S If f
M15251 ii; Area C°'°'
(E) 5:33: and Great
(EG) Germany and Italy (K)
(GN) Oceania

Remote Control SU-CHSO SL-CHSO
Transmitter

(The configuration of the speakers differs according to the area.)

1 ' *
[Because of unique interconnecting cables, when a component] , MASH Isarademalk ofNTT

requires service , send or bring in the entire system.

TRAVERSE DECK : RAE0113Z MECHANISM SERIES

ISPECIFICATIONS _.
I FM TUNER SECTION I CD SECTION
Frequency range 87.50 - 108.00 MHz Sampling frequency 441 kHz
Sensltlvlty 23.3 dBf (4.0 V, [HF '58) Decoding 16 bit linear
Total harmonic distortion Beam source/wavelength Semioonductorlaser/780nm
MONO 0.3 % Numberofchannels 2 ch, stereo
STEREO ' _ 0.5 % Frequency response 20 Hz ~ 20 kHz (+1, -2 dB)
SIN , SIN 90 dB filter (JIS.A)
MONO 60 dB (65 dB, IHF) Wow and flutter Below measureablelimil
Image rejection at 98.1 MHz 35 dB Digital filter ' 4 times oversampling
Stereo separation ' DIA oonverter MASH (1 bit DAC)
1 kHz 35 dB
Antenna terminal(s) 759 (unbalanced) I GENERAL
I AM TUNER SECTION Power consumption 180 W
. Powersupply AC 50Hz, 230 - 240 V
Frequency range Dimensions (W x H xD) 270 x 184.4 x 3439 mm
MW 522- 1 611 kHz Weight 4.2 kg
LW . 144-288 kHz Note'
59'5va (forSOOmW) 1 . Specifications are subject to change without notice.
MW (at 999 kHz) 250 uV/m 2 Weight and dimensions are approximate.
LW (at 252 kHz) 50';qu 3. Total harmonic distortion is measured by the digital spectrum analyzer.
System Tuner/Compact Disc Changer I Cassette Deck/Am plifier Speakers
SD-CHaO E
SC'CHBO E SL-CH 80 E | SU-CH80 E
SD-CHBO EB SB-CHBO E
sc-cHso EB SL-CHBO E | su-cnao EB
SD-CH80 EG

SC-CHSO E G

- SL-CHBO EG SU-CHBO EG
anasonlc sc-cnao an SL-CHSO an SU-CHBO GN se-cms P

* Made in PAES

Page 2

SL-CHSO

I CONTENTS

- PRECAUTIONOF LASER DIODE .............................
- HANDLING PRECAUTIONS FOR TRAVERSE DECK.
- LOCATIONOFCONTROLS .......

0 DISASSEMBLYINSTRUCTIONS.

0 HOW TO CHECKTHE SERVO AND MAIN P.C.B.
0 INSTALLATION OFTHE LOADING COMPONENTS .. ..
- INSTALLATION OF THE TRAY BASE AND TRAY ASS'Y ........ 17
I SCREMATICDIAGRAM ...................................................... 18 ~ 29
- DIGITAL SERVO SYSTEM
- PRINTED CIRCUIT BOARD
- BLOCKDIAGRAM .........
- GENERALINSPECTION

. PAGE

0 MEASUREMENTS AND ADJUSTMENTS ......................... 41) ~ 43
- DISPLAY FUNCTIONS OF AUTOMATICALLY-ADJUSTED

RESULTS ........................................................................... 44 & 45
- TERMINAL GUIDE OF ICs. TRANSISTORS 8t DIODES .. 45
0 TERMINALFUNCTIQN OF IC'S.. 46 ~ 49
- PACKAGING ...........................
- CD LOADING UNIT PARTS LOCATION
0 CD LOADING UNIT PARTS LIST ...........
- WIRE CONNECTION DIAGRAM.
0 TROUBLESHOOTING GUIDE...
- CABINET PARTS LOCATION.
- REPLACEMENT PARTS LIST.

NOTE :

- RESISTORS & CAPACITORS ............................................ 61 ~ 64

Refer to the service manual for Model No. SUI-CH8!) (Order No. MD940403608) for information on
"ACCESSORIES" , CONNECTIONS" and "PACKAGING".

I PRECAUTION OF LASER DIODE

CAUTION :

ACHTUNG:

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

Laser radiation from the pick up lens is safety level, but be sure the followings:

Do not disassemble the optical pick up unit, since radiation from exposed laser diode is dangerous.
Do not adjust the variable resistor on the pickup unit. It was already adjusted.

Do not look at the focus lens using optical instruments.

Recommend not to look at pick up lens for a longtime.

PSI-U?

Dieses Produkt enthéllt eine Laserdiode. lm eingeschalteten Zustand wird unsichtbare Laserstrahlung von der
Lasereinheit abgestrahlt. ,

Wellenlange : 780nm
Maximale Strahlungsleistung der Lasereinheit :100pW/VDE

Die Strahlung an der Lasereinheit ist ungefahriich, wenn tolgende Punkte beachtet werden:

1. Die Lasereinheit nicht zerlegen, da die Strahlung an derfreigelegten Laserdiode gefahrlich ist.
2. Den werkseitig justierten Einstellregler der Lasereinhit nicht verstellen.

3. Nicht mit optischen Instrumenten in die Fokussierlinse blicken.

4. Nicht fiber langere Zeit in die Fokussierlinse blicken.

ADVARSEL: I dette a apparat anvendes laser.

THIS MUSIC SYSTEM IS CAPABLE OF RECEIVING THE NEW AM STEREO BROADCASTS FROM THE AM
BAND RADIO STATIONS. HOWEVER LIKE MANY MUSIC SYSTEM CURRENTLY AVAILABLE ON THE MAR-
KET IT WILL REPRODUCE THIS AM STEREO SIGNAL ONLY IN AM MONO, WHICH, IN EFFECT, IS OF NO
LESSER QUALITY THAN YOUR AM MONO MUSIC SYSTEM.