Technics SHCH 650 Schematics

Page 1

ORDER NO.ADQZ11363CB

Service Manual

Sound Processor

SB-CH655

RS-CHSSO

Remote Control
Transmitter

SB-CHG55

SA-CH650

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

bring in the entire system.

I SPECIFICATIONS

(DIN 45 500)

I PRE AMP. SECTION

Sound Processor

SH-CH650

Colour
(K) .......... Black Type
Areas
Suffix for
Model No. Area Colour
(E) Europe and Oceania
Asia. Latin America. (K)
(GC) Middle Near East
and Africa

System: SC-CHGSO

I EQUALIZER, SOUND FIELD PROCESSOR SECTION

Input sensitivity and impedance Equalizer
For (E) area Center frequency 63, 160, 400, 1 k, 2.5 k. 6.3 k, 125 k(Hz)
PHONO 25 mV/47 k0 Fixed mode
DAT 250 mV/15 k0 SPACE (3 modes) HALL, LIVE. DISCO
MIC 06 mV/12 kQ GEO (3 modes) HEAVY, CLEAR, SOFT
For (GC) area CAR/HP (2 modes) CARST. HP ST
DAT, AUX 250 mV/15 kn Frequency response
MIC 0.6 mV/12 kQ For (E) area
Output level TUNER, CD, TAPE, DAT 15 Hz-20 kHz
DAT REC OUT (ANALOG) 150 mV/1.5 k0 PHONO (RIAA STANDARD CURVE)
30 H2~15 kHz/+1.5, -2.0 dB
For (GC) area
TUNER, CD, TAPE, DAT, AUX 15 H2~20 kHz
I GENERAL
Dimensions (WXHXD) 270x89.5x271 mm
Weight 1.7 kg
Notes:
1 . Specifications are subject to change without notice.
2. Weight and dimensions are approximate.
3. Total harmonic distortion is measmed by the digital spectrum analyzer.
System Sound processor Tuner amplifier Compact disc player Cassette deck Speakers
SC-CH650 SH-CHGSO SA-CHSSO SL-CHSSO RS-CHSSO SB~CH655

Technics

'(E) area...Made in PAES.

Page 2

SH-CH650

I CONTENTS

Page
0 LOCATION OF CONTROLS ............................. 2
DDISASSEMBLY INSTRUCTIONS . 3, 4
OSCHEMATIC DIAGRAM ............. 5~10
oPRINTED CIRCUIT BOARD DIAGRAM. 11~13
OWIRING CONNECTION DIAGRAM ..................... 13
NOTES:

Page
oDESCRIPTION OF FL PANEL .......................... 14
OBLOCK DIAGRAM ............. 15.18
OFUNCTION OF IC TERMINALS . ... 17
IREPLACEMENT PARTS LIST .18,19,21,22
OCABINET PARTS LOCATION IIIIIIIIIIIIIIIIIIIIIIIIIIII 20

Refer to the service manual for Model No. SA-CH650, Order No. AD921136202 for information on ACCESSORIES,

STACKING THE COMPONENTS, CONNECTIONS and PACKAGING.

I LOCATION OF CONTROLS

a 4

The functions indicated by the numbers with black background (for
example 0) can also be activated from the remote controll

0 V. Bass button and indicator (V. BASS)

Press to boost the dynamic low-frequency ranges.

® Demonstration button (DEMO)
Use for reference of the adjustments of equalization curves
and SPACE mode sounds. The pre-programmed equalization
curves and SPACE mode sounds will be heard sequentially for
adjustment example.

© Voice mute button (KARAOKE)
Press to perform KARAOKE" (microphone mixing with an
accompaniment).

ODisplay section

® Multi level display
Shows the equalization/spectrum analysis level,

@

6©

@®

9

Display mode select button
(DISPLAY, -SPECTRUM, -MODE)

Use to select one of 5 spectrum modes.
Press and hold to extinguish the equalization curve.

Sound effect adjustment control

(EFFECT)
Use to adjust the level of SPACE mode sounds (simulated
listening environments), and equalizer level.

Preset/User mode button (PRESET/USER)
Press to select eitherPRESET mode or USER mode.

Equalizer/SPACE mode ONlFLAT button
(ON/FLAT)
Press to switch the equalizer or SPACE mode on or flat.

SPACE mode button (SPACE MODE)
Press to select the SPACE mode.

Equalizer mode button (E0 MODE)
Press to select the equalizer mode.

CAR/HP mode button (CAR/H.P)
Press to select the equalizer mode especially programmed for
the car audio or headphones stereo use.

Microphone volume control (MIC VOLUME)

Use to adjust the microphone volume level.

Microphone jack (MIC) ((236, 12 k0)

Plug microphone cord into this jack.

SPACE mode indicator (SPACE)
Lights when you select the SPACE mode (DISCO, LIVE,
HALL).

Equalizer mode indicator (EG)
Lights when you select the equalizer mode (HEAVY, CLEAR,
SOFT).

Preset mode indicator (PRESET)
Lights when you select the preset mode.

USER mode indicator (USER)
Lights when you adjust the level of SPACE mode or equalizer
level.

Sound mode display
Shows the selected mode of equalization curve or SPACE
mode sound.