Technics SU-A909 - Page 60

Tone
amp.
NJM4580EDTE1
IC401
treble
bass
Output
amp.
UPC4570C
IC511
RL501
Q521,522
Pre
amp.
UPC4570C
IC351
Pre
amp.
UPC4570C
IC311
VR311
Relay
drive
+B2
Q501,502
BA6218
IC391
MOTOR DRIVE
RL521
Relay
drive
+B2
FRNT OUT
VGA RLY
PRE OUT
VR402(BASS),
VR403(TREBLE)
FRONT1
(L ch)
FRONT2
(L ch)
M
+B3
79
6
Drive
Pre amp
Logic
2,5,8
31
VR DOWN
VR UP
VR301
(VOLUME)
LOGIC GND
7
JK801
6
5
4
3
2
1
PRE GND
AC BACKUP
P ON/OFF
+B/VIRTUAL
D651,652,655,656
M5F78M05L
IC601
Regulator
To POWER AMPLIFIER
(SE-A909S)
D707D706 D710
+B3
Switch-
ing
Q710
Q702
Switch-
ing
PWR RLY
Virtual
battery
Q601
+B1
Q602
Q603
-B1
D601D709
D816
(A.V.B.O.)
+B3
D653,654
+B2
+B3
Virtual
battery
Virtual
battery
(GND)
TP4
(+15V)
TP5
(-15V)
TP3
(AC10V)
TP2
(AC10V)
TP1
-B/VIRTUAL
AC BACKUP
Notes
Signal line : PHONO signal
: TAPE REC signal
( ) indicates pin No. Right channel.