Sony DSR-20MD Service Manual page 81

HG-1 (OVER DISCHARGE PROTECT) PRINTED WIRING BOARD AND SCHEMATIC DIAGRAM
– Ref. No.: HG-1 board; 8,000 series –
• For Printed Wiring Board.
• There are few cases that the part isn't mounted in this model
is printed on this diagram.
HG-1
BOARD (SIDE A)
HG-1
BOARD (SIDE B)
A K
C
C
A
K
B E
C
A K
A
K
A
K
K
A
4-109
1 2 3
HG-1 BOARD
A
OVER DISCHARGE PROTECT
-REF.NO.:8,000 SERIES-
XX MARK:NO MOUNT
J901
CN2
NO MARK:EE MODE
DC IN
10P
12V 2.0A
AC BLOCK +12V 1
B
AC BLOCK +12V 2
DC +12V 3
DC +12V 4
GND 5
GND 6
DC IN 7
DC IN 8
DC OUT 9
2700
DC OUT 10 1/8W
C
D5
RD30M-T1B
D
D6
RD30M-T1B
R1
100k
E
R4
560k
F
R3
100k
D1
RD15M-T1B2
05
G
4 5
CN1
6P
RY1
R13 R15 R16
R12 Q4
2700 2700
2700 2SD2185S-TX
1/8W 1/8W
1/8W
12 9
9.6
IC2
R9
10k
D4
IC2 TL431CPS-E20 1SS123-T1
9.6
2.5
R14
C4 3600
4.7u
35V
R2
100k
4 3 2 1
IC1
R7 R8
MM1256XF-BE
100k 22k
0
IC1
0.6
2SC1623-T1-L5L6
Q2
5 6 7 8 0
2SC1623-T1-L5L6
5.6 11
D3
1SS123-T1
0.6
R5
100k
C1
1500p
C3 C5
Q1
10u 10u
2SC1623-T1-L5L6 R10 R11
16V 16V
C2 47k 47k
0.1u
4-110
OVER DISCHARGE PROTECT
DSR-20MD/20MDP
6 7
1 AC BLOCK +12V
2 AC BLOCK +12V
3 DC +12V
4 DC +12V
5 GND
6 GND
Q3
HG-1