Technics SU 6 Service Manual

Page 1

ORDER NO. HAD8312267BCS

Service Manual

Stereo Integrated Amplifier

[EX].lEKl,[EW].[EF].[EB]
[EH],[Ei],[XA],[XL],[EGA]

S U - 6 (K)
[EXMEWLIEKI
lEHl.lXAl.lEGAl

Areas

* [EX] is available in Scandinavia.
[EK] is available in United Kingdom.
" [EW] is available in Switzerland.
, " [EF] is available in France.
* [E8] is available in Belgium.
55; * iEH] is available in Holland.
). , . . , .
i/fi 0) _ ® [El] :5 available in Italy.

* [XA] is avialable in Southeast Asia, Oceania, Africa,

* The colors of this model include silver and black.

iThe NECK WDE mom is prwided with (K) in the Service Middle Near East and Central South America.
Manual. [XL] is available in Australia.
- A * EGA] is available in F.R. Germany.
I L [
it; ' I I WI 725
w v ma IJf

Specifications lSpecitications are subject to change without notice for further improvement.)

Frequency response
"3'" 45 500) PHONO RlAA standard curve
:08 dB (30 Hz~15 kHz)
I AMPLIFIER SECTION TUNER, AUX/CDIVIDEO, TAPE 10 HZ~80 kHz (A3 dB)
40 Hz~20 kHz contlnuous power output Tone controls
both channels driven 2 X 35W (80) BASS 50 HZ, +10 dB~ -10 dB
1 kHz continuous power output TREBLE 20 kHz. +10 dB~ -10dB
both channels driven 2 X 40W (80) Output voltage and impedance
Total harmonlc distortlon REC OUT 150 mV
rated power at 40 Hz~20 kHz 0.05% (80) Channel balance, AUX/CD/VIDEO 250 Hz~6,300 Hz :1 (13
rated power at 1 kHz 0.8% (80) Channel separation, AUX/CDNIDEO 1 kHz 55 dB
hall power at 20 Hz~20 kHz 003% (80) Headphones output level and impedance 420 mV/3300
halt power at 1 kHz 0.005% (80) Load Impedance 80~160
lntemlodlltatlon' dlstortion
rated power at 60 Hz: 1 kHz=4:1, SMPTE, 80 003% I GENERAL
Power bandwidth Power consum tion 200W
both channels driven, -3 dB 10 Hz~25 kHz (80) Power supply 9
ges'dua' "m d '3 08 "V For Unlted Kingdom and Australla AC 50Hz/60 Hz, 240v
amplng lactor 40 (80)
Input sensitivity and impedance For contlnental Europe AC 50 Hz/GO Hz, 220V
For other areas AC 50 HZ/GO HZ, 110V/120V/220V/240V
PHONO 2'5 "VWKQ Dtmensions (WXHXD) 315 x 99 X 245 mm
TUNER, AUX/CD/VIDEO 150 mV/27kfl (12-13/32>< 329/32,, >< 921/32")
TAPE 150 mV/27kf2 W . M 4 7 k
PHONO maxlmum Input voltage (1 kHz, RMS) 150 mV 99 ' 9
S/N (10.4 lb.)
rated power (80)
PHONO 73 dB (IHF, A: 72 (:13) Note:
TUNER. AUX/CD/VIDEO, TAPE 89 dB (IHF,>A: 98 dB) Total harmonic distortion is measured by the digital spectrum

analyzer (HP. 3045 system).

O
I GChIllCS Matsushita Electric Trading Co., Ltd.
PO. Box 288. Central Osaka Japan .

Page 2

l CONTENTS

FEATURE ................................. 2
STANDARD CONNECTION METHOD WITH

DIRECT CONNECTOR . .
LOCATION OF CONTROLS .......
DIRECT OPERATION . . . .
TAPE RECORDING AND TAPE- TCI TAPE RECORDING
SYNCHRO- RECORDING . . . . . . .
PROTECTION CIRCUITRY .......
BEFORE REPAIR AND ADJUSTMENT
DISA$EMBLY INSTRUCTIONS .....
TERMINAL GUIDE OF TRANSISTORS, DIODES AND IC'S.

I FEATURE

0 Super bass circuit capable of reproducing grave low
sound with compact speakers.

I Direct operation allowing you to select the desired
source by one touch.

0 Direct connection system that makes the connection
when set up,

Page
PRINTED CIRCUIT BOARDS ................... 9 ~ 11
CIRCUIT BOARDS AND WIRING CONNEC 0N
DIAGRAM (Top View) . . . .
POWER AMPLIFIER PROTECTION . . . .
OPERATION CONTROL CHART . .
TERMINAL FUNCTION OF DIRECT CONNECTOR
FUNCTION OF TERMINAL (FUNCTION SELECTOR ICZO1) .

BLOCK DIAGRAM ............... 19, 20
SCHEMATIC DIAGRAM ..... 21 ~ 24
RESISTORSBi CAPACITORS . . . . . 25
REPLACEMENT PARTS LIST . . . . . . . . 25, 26
EXPLODED VIEW ....................... 27, 28

0 Signal processing display that indicates the condition
of program source.

0 Electronic protection circuit that protects the speakers
and amplifier from breakdown.

I STANDARD CONNECTION. METHOD WITH DIRECT CONNECTOR

® Lift the direct connector on the
tape deck. Push it straight
down to lock it into place.

(9 Remove the stabilizing pin
from the back panel. (Turn
counterclockwise 90° and
pull.)

© insert thapin into the top
panel. (Push in and turn
clockwise 90°.)

properly.

After mung

cords.

o "AUX/CD/VIDEO" terminals

Use these terminals to connect a tape deck (playback
only), compact disc (digital audio disc) player, or audio
output of a video unit.

It the video unit has only one audio output terminal, use a
Y-type cord (monaural to stereo) to make the connection.

Video cassette
deck etc. (option)

*A'uxlco/ .
VIDEO Audio output terminal

® Lower the amplifier onto the
tape deck. Line up the direct
connector and stabilizing pin

® Connect the tuner to the
amplifier the same way as in ®

1. When using the direct
connectors. do not use pin

2. When using the graphic
equalizer, place it between
the amplifier and the tape
deck.

(sue) Tuner (op ion)

Tape deck

Graphic Equalizer (option)

[I ll

Tape deck (option)

~ 9.
nn tthe turntable and "". . . "I.
© Co ec . . . 3. Posmon the units in a straight
speakers With their respective . . .
column to aVOId twusting and
cords. . .
breaking the direct connectors.
Moles:

4. II this unit is installed in a rack.
first make the direct connector
connections.

0 Synchro-recording terminal

in addition to the turntable, the Technics compact disc

player (model SL-P7) can be connected by using the

synchro-recording connection cord (option)t
Synchro~recording

. Compactdisc
terminal

fimfimm player (option)

\

T

\ Synchroqecording cord

Note:
lithe model SLa3 or SL~6 turntable is used. an extension cord
(option) is needed.