Technics SU-V300M2 Manual page 31

SCHEMATIC DIAGRAM-2
C
TONE AMP CIRCUIT
CP905
1 A
2
3 B
4 A
5 B
6
7
8
Q815
2SA1309ARTA
MUTING CONT.
0V -14.3V
0V
R495
22K
C483
50V1
S807
(POWER)
STANDBY ON
6.2V
D824
MA165TA
0V
6.1V
Q813,814
UN4111TA
LED DRIVE
CN906
1
D823
2 MA165TA
5.2V
3
R822 R823
4
820 1K
5
6
7
E
To MAIN CIRCUIT (CN904)
on SCHEMATIC DIAGRAM-3
E501
CP904
1 2 3 4 5 6 7 8
B A
Q505-508
2SC3327ABTP
MUTING
Q505 Q506
0V 0V
D820
MA165TA
-14.6V -14.6V
S401
(TONE)
defeol
on
IC471
UPC4570C
TONE AMP
0V 15.4V
1 8
0V 0V
2 7
0V 0V
3 6
0V
4 -15.4V 5
C495 C496
0.01 0.01
C475 100P C476 100P
R477 100K R478 100K
VR502
100K(G)
(BALANCE)
A
Q813
Q810
UN4211TA
LED DRIVE
0.1V
Q814
Q817
6.2V
Q818
DTA124ESTP
2SC2785FETA
SWITCHING
(STANDBY)
SWITCHING
6.2V
1.3V (STANDBY)
0V 0V
6.2V
D826
R834
MA165TA
10K
E
To MAIN CIRCUIT (CN903)
on SCHEMATIC DIAGRAM-3
CP903
1 2 3 4 5 6 7 8
A B C D
15.4V
Q507 Q508
0V 0V
-14.6V -14.6V
A B
R496
22K
C484
50V1
B
A B C D A B
6.2V
Q812
UN4211TA
LED DRIVE
0.1V
5.1V 3.3V
R832
1M
4.8V
:POSITIVE VOLTAGE LINE
:NEGATIVE VOLTAGE LINE
:PHONO SIGNAL LINE
E401
HEADPHONES
D
JACK CIRCUIT
CN601 CP601
1 1
2 2
3 3
4 4
5 5 R
6 6
7 7 L
G
JK601A
HEADPHONES