Technics SU-7700 Service Manual

Printed Circuit Board ..
:
METER
RIGHT VU/POWER LEFT
SPEAKERS
aan |
MAIN
METER LAMP
(43V 025A)
LEFT CH. SPEAKER
RIGHT CH. SPEAKER
TR303,304
2SA564A
RELAY DRIVE
.... Model SU-7700
6 5
VU/POWER
VOLUME CONTROL
r—-T--1--
BALANCE CONTROL SUBSONIC FILTER
Jf 22.
R2 200K
A
TR220 TR204 ,218 TR201, 202 TR203 217 TR219
2SC1328 2SC828 2SA798A 25C828 2501328
EMITTER FOLLOWER CURRENT MIRROR DIFFERENTIAL CURRENT MIRROR EMITTER FOLLOWER
INPUT SELECTOR
me i |
SUE
AIRE
INGE
HI
aces
LOUDNESS
BASS
CONTROL
TREBLE
ONTROL
MODE
REC
MODE
TAPE
MONITOR
eit
Ap
1 S8 |
ISUP 1G39R A
C102
SVITA7136P B
EQUALIZER
C
D
TR301,302 TR206
2SA564 2SC1885
Sie swrtgue PONE C10
SVITA7136P
EQUALIZER
TR212
2SA794
DRIVE
E
GROUND GROUND
TR210 TR209 TR205 TR211
2SC1567 2SC1567 2SC1885 2SA794
DRIVE DRIVE PRE DRIVE DRIVE
SU-7700 [9] SU-7700

Technics SU-7700 Specifications

General

Damping factor	30
Input sensitivity	2.5mV (MM), 150mV (line)
Output	150mV (line)
Speaker load impedance	4Ω to 16Ω
Power output	50 W per channel into 8Ω (stereo)
Signal to noise ratio	95dB (line)
Channel separation	55dB (MM)