JVC AV-48P777/H Service Manual page 33

4.7 ADJUSTMENT PROCEDURE
4.7.1 CHECK ITEMS
Measuring
Item
instrument
X-RAY Resistor
PROTECTOR [6.8kΩ±34Ω
check (1/4W) ]
S1 CONNECTOR
1 2 3 4 5
X-RAY2 NC
TP-E X-RAY1
( )
HIGH VOLTAGE Signal
generator
check
HV voltmeter
Test point Adjustment part
S1 connector
2 pin : X-Ray2
3 pin : X-Ray1
[DEF&CONVE
RGENCE OUT
PWB]
TP-91B
140.0V
TP-91
B1
CN008
2
X-RAY
R565
CRT anode
(1) Receive NTSC whole black signal.
(2) Connect resistor 6.8kΩ±34Ω (1/4W) between 2 pin
and 3 pin of the S1 connector.
(3) Make sure that the screen picture disappears.
(4) Unplug the power cord.
(5) Remove the resistor [6.8kΩ] from S1 connector.
(6) Again plug the power cord, make sure that the
normal picture is displayed on the screen.
RESISTOR
6.8K 34 1/4W
1 2 3 4 5
TP-E
R563
R561
D562 D561
R562 C311
(1) Receive NTSC whole black signal.
(2) Connect the HV voltmeter between CRT anode and
GND.
(3) Check the high voltage DC 31.6kV+1.0kV / -1.5kV.
Description
SERVICE CONNECTOR
S1
FR311 D311
3
1
(No.YA455)1-33
T502
FBT