Technics STCH 707 Service Manual

Page 1

ORDER NO AD9309282C3

Service Manual

Tuner/Sound Processor

SL-CH707 ST-CH707

Remote Control
Transmitter

SB-CH505 RS-CH505 SE-CH505

Tuner

ST-CH707

Colour
(K) . . . . Black Type

Because of unique interconnecting cables,
when a component requires service, send or

bring in the entire system.

Area
Suffix for
sa-cnsos Model No Area C°'°
Asia, Latin America,
(GC) Middle Near East and (K)
Africa

Specification
I Pre-amplitier section
Input sensitivity/impedance

AUX 250 mV/15 k0
DCC 250 mV/15 k0
Output level
DCC HECOUT 150 mV/1.5 kn
Frequency response
AUX 30 Hz-20 kHz
Dec 30 Hz-20 kHz
I E0, SFP section
Center frequency
80, 250, 1 k, 4 R, 12.5 k(Hz)
Fixed mode
SPACE 3 modes (DISCO, LIVE, HALL)
GEO 5 modes
(HEAVY, CLEAR, SOFT. CAR, HP ST)
Mic echo 1.0-1.6 sec

System: SC-CH404

SC-CH505
Stereo separation 1 kHz 35 dB
Antenna terminai(s) 750 (unbalance)
I AM tuner section
Frequency range
Mw 522-1 611 kHz (9 kHz step)
530-1620 kHz (10 kHz step)
LW 144-288 kHz (9 kHz step)
Sensitivity (S/N 20 dB)
MW 500 uV/m
LW 50 W
I Timer section
Clock Quartz-lock type
Function 24-hour programmable;

Play timer (1 time), Fiec timer (1 time),

Sleep (120 min, 1 min intervals)

Setting 1 minute-23 hours 59 minutes
(1 min, intervals)

I FM tuner section I General
Frequency range Dimensions (Wx HX D)

. 8750-10800 MHz (0.05 MHz steps) 270 x 89 X 274 mm
Sensitivity 1.8 uV (IHF usable) Weight 1_75 kg
SM 26 dB 1-5 IJV (750) .

SIN MONO 70 dB [75 dB, IHF) Notes:
1. Weights and dimensions shown are approximate.
2. Design and specifications are subject to change
without notice.
System Tuner Compact disc player Amplifier Cassette deck Speakers
sc-CH404 ST-CH7o7 SL-CH505 SE-CH404 RS-CH404 SB-CH404
SC-CHSOS ST-CH707 SL-CH7D7 SE-CH505 Rs-CHsos SB-CH505

Technics

Made in NABEL

Page 2

ST-CH707

I Contents

Page
oLOCATION OF CONTROLS ............................ 2
OSETTING THE TIME ............. I. 3
oDISASSEMBLYINSTRUCTIONS ........ t . 4, 5
IPOWER SUPPLY WITH TUNER ST-CH707 t . .. . 6
nSCHEMATIC DIAGRAM ................. .. .7~14
IPRINTED CIRCUIT BOARD DIAGRAM ............... 15~18

NOTE:

Page
IWIRING CONNECTION DIAGRAM ..................... 18
IBLOCK DIAGRAM ................................ 19~21
IFUNCTION OF IC TERMINALS ..................... 13~17
IREPLACEMENT PARTS LIST , ,, . .23~27
CCABINET PARTS LOCATION .......................... 28

Reter to the service manual for Model No. SE-CH404 (Order No. AD930721808) or SE-CH505 (Order No. A09309283CB) for
information on ACCESSORIES", STACKING THE COMPONENTS, CONNECTIONS and PACKAGING".

l Location of Controls

The functions Indicated by the numbers with black background (for example 6) can also be activated from the remote control,

Record timer button

External source input select but-
ton

Internal source input select but-
ton

Play timer button

EO/SPACE mode ONIFLAT but-
ton

Tuner source/band select but-
ton

Multi-control buttons

Flemote control signal sensor
V. bass button

Voice mute button

Echo button

EQ/SPACE mode select button
CIock/timer button

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® SENSOR @ V.BASS

CED
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o

' I]

@[EREC

® EXT

{3) INT
@I PLAY

(7) MULTI CONTROL

6 TU NEH/BAND

6 ONIFLAT

O

\J-CDGDCD rvfi

® ECHO @ CLOCK/TIMER

KARAOKE -MODE
m -PHESET/USER