JVC AV-32WL1EI, Service Manual

Page: 21 / 81

No.51733
AV-32WL1EU
AV-32WL1EU
AV-32WL1EI
21
ADJUSTMENT
CHECK ITEMS BEFORE ADJUSTMENT
Item
Measuring
instrument
Test point Adjustment part Description
Check of B1
Power supply Signal
generator
DC voltmeter
TP-91(B1)
TP-E(GND
# # # #
)
[X connector
on
POWER &
DEF PWB]
1. Receive any broadcast.
2. Select 2.V/C from the SERVICE MENU.
3. Select 1.RGB BLK with FUNCTION UP/DOWN key.
4. Press the FUNCTION LEFT/RIGHT key, the whole black screen
display.
5. Connect a DC voltmeter to TP-91(B1) and TP-E(GND
#
).
6. Make sure that the voltage is DC139.0V
±
2.0V.
Check of High
voltage Signal
generator
High-voltage
meter
CRT anode
1. Receive any broadcast.
2. Select 2.V/C from the SERVICE MENU.
3. Select 1.RGB BLK with FUNCTION UP/DOWN key.
4. Press the FUNCTION LEFT/RIGHT key, the whole black screen
display.
5. Connect a High-voltage meter to CRT ANODE
6. Make sure that the voltage is the 31.5kV .
FOCUS ADJUSTMENT
Item
Measuring
instrument
Test point Adjustment part Description
Adjustment of
FOCUS Signal
generator FOCUS 1
FOCUS 2
[In HVT]
1. Receive a cross-hatch signal. Change the ASPECT mode to
FULL.
2. By turning the FOCUS 1 VR, adjust the picture so that the 6th
vertical line from the left side of the cross-hatch picture becomes
thinnest.
3. By turning the FOCUS 2 VR, adjust the picture so that the 4th
horizontal line from the upper side of the cross-hatch picture
becomes thinnest.
4. Carry out adjustment by repeating the steps 2 and 3 above.
5. Make sure that when the screen is darkened, the lines remain in
good focus.
FOCUS 1
FOCUS 2
+1.0kV
-1.5kV
SCREEN1
FOCUS2
FOCUS1
Adjustment VRs in HVT