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No. 51787
C-20210
AV-20220
AV-20221
23
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. 1, 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.
Fig. 1
4
T522
CONNECTOR
RESISTOR
16.7k
Ω±
Ω±
Ω±
Ω±
1%1/4W
HEATER
R562
D561
R561
X
C561
R563
D562
3
2
1
Q561
D563
Q562
Q951
D958 R953
RY901
POWER
ON OFF
C562
R564
D565
BW
Summary of Contents for AV-20220/S
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