JVC AV-32WL1EU Service Manual page 21

ADJUSTMENT
CHECK ITEMS BEFORE ADJUSTMENT
Measuring
Item
instrument
Check of B1 Signal
Power supply generator
DC voltmeter
Check of High Signal
voltage generator
High-voltage
meter
FOCUS ADJUSTMENT
Measuring
Item
instrument
Adjustment of Signal
FOCUS generator
Adjustment VRs in HVT
Test point Adjustment part
TP-91(B1)
TP-E(GND # # # # )
[X connector
on
POWER &
DEF PWB]
CRT anode
Test point Adjustment part
FOCUS 1
FOCUS 2
[In HVT]
FOCUS2
FOCUS1
SCREEN1
No.51733
Description
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.
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
Description
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
AV-32WL1EU
AV-32WL1EU
AV-32WL1EI
+1.0kV
.
-1.5kV
21