Technics SU-C800U Service Manual

Control Amplifier
System: SU-A900D
SU-C800U
SE-A900S
System: SU-A800D
SU-C800U
SE-A800S
Remote Control
Transmitter
ORDER NO. AD9506166C8
ervice Manual
Amplifier
SU-C800U
Colour
Areas
Suffix for Area Colour
Model No.
Europe, Asia, Latin
America, Middle East,
Africa and Oceania
Remote Control
Transmitter
System: SU-A900D
Control amplifier SU-C800U
Power amplifier SE-A900S
System: SU-A800D
Control amplifier SU-C800U
Power amplifier SE-A800S
Because of unique interconnecting cables, when a component
requires service, send or bring in the entire system.
Specifications (DIN 45 500)
Total harmonic distortion Vol. Max 20 Hz — 20 kHz 0.01 %
Input sensitibity/impedance
PHONO 2.5 mV/47 kQ
TUNER, CD, AUX, TAPE 1, TAPE 2/DCC 200 mV/27 kQ
Phono maximun input voltage (1 kHz, RMS) 150 mV
S/N
PHONO 76 dB (77 dB, IHF ’66)
TUNER, CD, AUX, TAPE 1, TAPE 2/DCC 90 dB (97 dB, IHF ‘66)
Frequency response
PHONO RIAA standard curve +1 dB (30 Hz — 15 kHz)
TUNER, CD, AUX, TAPE 1, TAPE 2/DCC
3 Hz — 80 kHz (+0, — 3 dB)
+0 dB, — 0.3 dB (20 Hz — 20 kHz)
Tone controls
BASS 50 Hz, + 10 dB, -10 dB
TREBLE 20 kHz, +10 dB, —10 dB
Output voitage
TAPE 1, TAPE 2/DCC REC OUT 200 mV
PRE OUT 1V
Channel balance (AUX, 250 Hz — 6.3 kHz) +1 dB
Channel separatoion (AUX, 1 kHz) 50 dB
@ GENERAL
Dimensions (W x Hx D) 430 x 69.3 x 307 mm
Weight 2.7 kg
Notes:
1. Design and specifications are subject to change without notice.
Weight and dimensions are approximate.
2. Total harmonic distortion is measured by the digital spectrum
analyzer.
/A\WARNING
This
service
information
is
designed
for
experienced
repair
technicians
only
and
is
not
designed
for
use
by
the
general
public.
It
does
not
contain
warnings
or
cautions
to
advise
non-technical
individuals
of
potential
dangers
in
attempting
to
service
a
product.
Products
powered
by
electricity
should
be
serviced
or
repaired
only
by
experienced
professional
technicians.
Any
attempt
to
service
or
repair
the
product
or
products
dealt
with
in
this
service
information
by
anyone
else
could
result
in
serious
injury
or
death.
‘Technics
© 1995 Matsushita Electric Industrial Co., Ltd.
All rights reserved. Unauthorized copying
and distribution is a violation of law.

Technics SU-C800U Specifications

General

Type	Stereo Amplifier
Input Sensitivity	150mV (Line)
Damping Factor	60 (8 Ohm, 1 kHz)
Speaker Load Impedance	4 - 16 Ohm
Channel Separation	65dB (1kHz)

Summary

Front Panel Controls

Operation Check and Main Component Replacement Procedures

To Supply Power Source

Function of IC Terminals

Schematic Diagram

Printed Circuit Board Diagram

Operation P.C.B. Diagram

Layout diagram for the operation printed circuit board.

Tone Switch P.C.B. Diagram

Layout diagram for the tone switch printed circuit board.

Volume P.C.B. Diagram

Layout diagram for the volume control printed circuit board.

Balance VR. P.C.B. Diagram

Layout diagram for the balance volume control printed circuit board.

Power Switch P.C.B. Diagram

Layout diagram for the power switch printed circuit board.

Wiring Connection Diagram

Block Diagram

Replacement Parts List

Cabinet Parts Location