AV-48WP74
AV-56WP74
(No.52105)1-63
3.9 HOW TO CHECK THE HIGH VOLTAGE HOLD DOWN CIRCUIT
3.9.1 HIGH VOLTAGE HOLD DOWN CIRCUIT
After repairing the high voltage hold down circuit.
This circuit shall be checked to operate correctly.
3.9.2 CHECKING OF THE HIGH VOLTAGE HOLD DOWN CIRCUIT
(1) Turn the power switch ON.
(2) As shown in figure bellow, set the resistor (between S1 connector 2 & 3).
(3) Make sure that the screen picture disappears (no raster).
(4) Temporarily unplug the power cord.
(5) Remove the resistor (between S1 connector 2 & 3).
(6) Again plug the power cord, make sure that normal pictures is displayed on the screen.
T502
FBT
CN003
X-RAY
RESISTOR
6.8K 0.5% 1/4W
1 2 3 4 5
SERVICE CONNENTOR
TP-E
R561
D561
D562
C811
R562
FR811
D812
B1
TP-91
C562
R565
X-RAY2
1 2 3 4 5
X-RAY1
NC
TP-91
140V
TP-E
( )
12
4
1
6
2
8
2
3
1
7
10
9
5
S1
CONNENTOR
S1