Technics SU-V4 Service Manual

D407, 408 D403-~ 406
Positive
voltage
line
©
SVOMZ316C
SVDS3V20
Volume control
L
ing
¢ “BLU |
Pai BRN |
. | [AC 120]
® |.
7 | 3 orn | [Ac_10]
Treble
control
re
vet,
[0]
(Lch)
RED LIAC 120
@
BLK | AC 10
i O
[ine
eee
‘cc
6o———
||Sael
1
Negative
voltage line
4 + SOVIOO] SOV 100
R327 68K VO
C404 56Vv8200
R329 47K
R355 22K
250836
REGULATOR
C3it 0.0]
C3I7 3P
c207 0.056
Ars 33
100KC
2SB750
REGULATOR
(TREBLE) —
VR203-1
Clamp voltage adj.
Q301, 302 Q303~ 306 Q307~ 310
2SK 109 2SC 263! 2SAIOIS
BUFFER DIFFERENTIAL CURRENT MIRROR
C2ii
R213 3.3K} 0.0039
SVITA73I7P
SPEAKERS PROTECTION
Eo.7] Lo JLo} Ce | Eos} (1) Co £23) B20]
IC 601
Q3Il, 312 Q313, 314 © Q315, 316
2SA92I 2SAII24 2SC2632
EMITTER FOLLOWER ~ PRE ORIVE CONSTANT CURRENT
S7(SUBSONIC FILTER)
on = off
C309 220P
D301, 302 - D0303~ 310 D3, 312
MAI62A OA 90 SVDMA26— |
R608 100K
S4 sa-1!'d 4
(LOUDNESS)
on—— off egal
L
R204
Loudness |
R6I9
0605 2.7K
D606 R620
Clamp voltage adj.
Q60!, 602 Q603 Q604 D601, 602, 605, 606
Bass
control
(Rch)
2SC1980
2SAI0I5
2SCI685
MAI50
.
--
CURRENT
RELAY
HOLD
RELAY
HOLD
DETECTOR
‘Treble control (Rch)
REC/PLAY
|
|
ae
Straight DC «Via tone

Technics SU-V4 Specifications

General

Brand	Technics
Model	SU-V4
Category	Amplifier
Language	English