JVC AV-27320 Service Manual page 28

AV-27320
AV-27330
AV-27S33
HOW TO CHECK THE HIGH VOLTAGE HOLD DOWN CIRCUIT
1. HIGH VOLTAGE HOLD DOWN CIRCUIT
After repairing the high voltage hold down c ircuit 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 switch to on.
(2) As shown in Fig. 1, set the resistor between
(3) Make sure that the screen pic ture disappears.
(4) Temporarily unplug the power plug.
(5) Remove the resistor replac ed
(6) Again plug the power plug, make sure that the normal picture is displayed on the screen.
R922
POW ER
ON OFF
D931
28
X connec tor
X connector 1 and
Q921
Q923
Q922
D526
R935
C935
1 and 3 .
3 .
RESISTOR
18.00 k Ω± Ω± 1%
Ω± Ω±
3 2 1 X CONNECTOR
R531
R533
C529
Fig. 1
No. 51937
HEATER
T521
4
R529
D523