Sony TRINITRON HMD-A420 Service Manual page 30

1 2 3
A
D
-c
(HV)
bc2
B
bc1
C558
0.033
100V
C
R584
5.6k
ac1
D528
RGP-02-18E
D
E
F
G
• Divided circuit diagram
One sheet of D board circuit diagram is divided into six
H
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.
a b 1
Ref. No.
Circuit diagram division code
I
Schematic diagram
Ò Ò Ò Ò Ò
D
-b board
4 5 6
+12V
R593
JW
+81V
C564
D533 47
1SS119 25V
IC502
UC3843
PWM CONT R581
NC
COMP VREF
C554
R569
680p
680
FB VCC
R554
1S119
15
ISENSE OUT
C562
R555
0.1
120
R561
OSC GND
47k
R570 C546 R559
Q539
2.2k 56p 1k
2SC945
C559
2200p SYNC BUFF
100V
R579
R558
2.2k
15k
Q538
2SC945
SYNC BUFF
R5133 C553
R556 D537
2.7k 470p
10k RGP-02-18E
C561
680p
R553
Q525
100k
2SA733
Q534
2SC945
OVP
R5144 R5132
10k JW
Schematic diagram
5-19
D
-c board
7 8 9
FB502
5.2µH
R519 T501
100 2W C537 FBT
C539
2200p
10
2kV
100V
1
R5142
D521
100 2W
BYV27
9
D516
D515
10
C536
BYV26C
1500p
Q522
1kV
2SK2843
8
7
S
6
D536
R5003
SB140
R520 D509
10k
(11DQ03)
220
PS104R
3
C535
R521
100
4.75k
R551
ZD502
OVP 7.32k
MTZJ18C
C540 R552
C545
0.1 100k
10
R598
34.8k
R599 C599
4.87k 220
1% 50V
l l l l l
10
11 12
TO
HV
PICTURE TUBE
12
11
14
C530
0.1Ł
100V
VF1
VF2
13 bc5
R5100
VR501
16 100k
100k
HV ADJ
15
4 bc4
R594
120K
C532
R515
0.047
78.7k
100V
bc3
bc6
CN504
D528
1P
RGP02-18
1 1.2kV
C567 TO A BOARD
0.01
2kV CN309
B-SS3545<AEP>-D..-P3-EPS05
5-20
13 14