Read Sony HMD-A420 Service Manual online
5-15
1
A
B
C
D
E
F
G
H
I
2
12
13
11
10
9
8
7
6
5
4
3
14
5-16
•
Divided circuit diagram
One sheet of D board circuit diagram is divided into six
sheets, each having the code D-
a
to D-
f
. For example, the
destination ab1 on the D-
a
sheet is connected to ab1 on the
D-
b
sheet.
b
1
a
Ref. No.
Circuit diagram division code
HV
9
10
3
6
1
11
14
VF1
VF2
4
15
16
13
T501
FBT
+81V
D
-c
(HV)
B-SS3545<AEP>-D..-P3-EPS05
+12V
7
8
12
bc4
bc5
bc3
bc6
R594
120K
120K
1.2kV
CN504
1P
1
TO A BOARD
CN309
D528
RGP02-18
VR501
100k
R515
78.7k
R5100
100k
HV ADJ
C567
0.01
0.01
2kV
TO
PICTURE TUBE
0.1
100V
C530
C532
0.047
100V
C537
2200p
2kV
FB502
5.2µH
5.2µH
R519
100
2W
R5142
100
2W
C539
10
100V
D521
BYV27
D509
PS104R
D515
BYV26C
D516
1S119
D533
1SS119
C536
1500p
1kV
S
Q522
2SK2843
R520
220
R579
2.2k
2.2k
R5003
10k
R521
4.75k
R555
120
R5132
JW
R5144
10k
R584
5.6k
5.6k
R554
15
1
2
3
4
5
6
7
8
IC502
UC3843
PWM CONT
COMP
FB
ISENSE
OSC
VREF
VCC
OUT
GND
C553
470p
470p
C540
0.1
R5133
2.7k
C535
100
bc1
bc2
ac1
R551
7.32k
R558
15k
R556
10k
D537
RGP-02-18E
R552
100k
100k
R598
34.8k
R553
100k
100k
ZD502
MTZJ18C
C545
10
Q534
2SC945
Q539
2SC945
SYNC BUFF
SYNC BUFF
Q538
2SC945
Q525
2SA733
OVP
OVP
D528
RGP-02-18E
C554
680p
680p
C546
56p
C558
0.033
100V
C561
680p
680p
100V
C559
2200p
R581
NC
R561
47k
C562
0.1
R569
680
R593
JW
R570
2.2k
2.2k
R559
1k
C564
47
25V
(11DQ03)
D536
SB140
1%
R599
4.87k
50V
C599
220
D
Schematic diagram
-
c
board
l
l
l
l
l
D
Schematic diagram
Ò
Ò
Ò
Ò
Ò
-
b
board
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