No.52021
AV-14F13
AV-14F33
29
HOW TO CHECK THE HIGH VOLTAGE HOLD DOWN CIRCUIT
1. HIGH VOLTAGE HOLD DOWN CIRCUIT
After repairing the high voltage hold down circuit shown in Fig. 1.
This circuit shall be checked to operate correctly.
2. CHECKING OF THE HIGH VOLTAGE HOLD DOWN CIRCUIT
(1) Turn the POWER SW ON.
(2) As shown in Fig.2, set the resistor (between X connector 1 & 3 ).
(3) Make sure that the screen picture disappears.
(4) Temporarily unplug the power cord.
(5) Remove the resistor (between X connector 1 & 3 ).
(6) Again plug the power cord, make sure that the normal picture is displayed on the screen.
B1
T522
Q94
2
HVT
HEATER
R562
D561
FR561
X
C561
R563
IC701
27
28
Q511
D510
D562
3
2
1
4
Q941
Q52
2
10
4
3
IC201
H-OUT
T521
Q521
H-Vcc
Fig.2
Fig. 1
RESISTOR
RESISTOR
RESISTOR
RESISTOR
1
5.0k
Ω±1
%
1
/4W
1
5.0k
Ω±1
%
1
/4W
1
5.0k
Ω±1
%
1
/4W
1
5.0k
Ω±1
%
1
/4W
C561
R563
3
2
1
X CONNECTOR
R562
FR561
D561
D562
Fig. 2
Summary of Contents for AV-14F13
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