JVC AV-T2122 Service Manual page 20

AV-T2122
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
(3) Make sure that the screen picture disappears.
(4) Temporarily unplug the power cord.
(5) Remove the resistor (between
(6) Again plug the power cord, make sure that the normal picture is displayed on the screen.
Q941
Q942
IC701
27 28
Q511
26
X connector 1 & 3 ).
X connector 1 & 3 ).
IC201
H-Vcc
3
H-OUT
4
D510
D562
R563
RESISTOR RESISTOR RESISTOR RESISTOR
17.2kΩ Ω Ω Ω ± ± ± ± 1% 1/4W
3 2
R562
D562
R563
No.51866
B1
Q522
T521
Q521
Fig. 2
X
3 2 1
FR561
R562
D561
C561
Fig. 1
1 X
CONNECTOR
FR561 D561
C561
Fig. 2
T522
HVT
10
4
HEATER