Technics SU-A909 Service Manual page 60

UPC4570C
IC351
Pre
amp.
VR301
(VOLUME)
VR311
M
7 9
Drive
6
+B3
Pre amp
2,5,8
Logic
1 3
Q702
Switch-
ing
+B1
D816
(A.V.B.O.)
+B3
-B1
+B2
M5F78M05L
IC601
+B3 Regulator
UPC4570C
IC311
Pre
amp.
NJM4580EDTE1
IC401
Tone
amp.
treble
bass
VR402(BASS),
VR403(TREBLE)
BA6218
IC391
MOTOR DRIVE
+B3
Q710
D706 D710
Switch-
ing
(+15V)
TP5
Q601
Virtual
battery
Q602
D709 D601
Virtual
battery
Virtual
battery
Q603
D651,652,655,656
D653,654
UPC4570C
IC511
Output
amp.
RL501
Q501,502
Relay
+B2 +B2
drive
(GND)
TP4
D707
(AC10V)
TP2
(-15V)
TP3
(AC10V)
TP1
Notes
Signal line : PHONO signal
: TAPE REC signal
( ) indicates pin No. Right channel.
FRONT1
(L ch)
PRE OUT
FRONT2
(L ch)
RL521
Q521,522
Relay
drive
JK801
7 LOGIC GND
6
P ON/OFF
5 +B/VIRTUAL
To POWER AMPLIFIER
(SE-A909S)
4 PRE GND
3
-B/VIRTUAL
2 AC BACKUP
1 AC BACKUP