JVC AV-32Z25EUY Service Manual page 18

AV-32Z25EUY
AV-28Z25EUY
FOCUS & SCREEN ADJUSTMENT
Measuring
Item
instrument
FOCUS Signal
adjustment generator
[28" MODEL]
HVT
FOCUS Signal
adjustment generator
[32" MODEL]
FOCUS 2
HVT
SCREEN Signal
Adjustment generator
V/C
1. RGB BLK
- / +
: STORE
OK
0 0 0 0 0 1 0 0
SERVICE MODE SCREEN
18
Test point Adjustment part
FOCUS VR
[In HVT]
FOCUS VR
SCREEN VR
FOCUS 1
FOCUS 2
[In HVT]
FOCUS1(F1)
FOCUS2(F2)
SCREEN1(S1)
SCREEN VR
[In HVT]
PAL
00
i : EXIT
CLOW
status
[28"MODEL]
1. Receive a cross-hatch signal.
2. Press the "ZOOM" key and select the FULL mode.
3. While watching the screen, adjust the FOCUS VR to make the
vertical and horizontal lines as fine and sharp as possible.
4. Make sure that when the screen is darkened, the lines remain
in good focus.
[32"MODEL]
1. Receive a cross-hatch signal.
2. Push the "ZOOM" key and select the FULL mode.
3. By turning the FOCUS2 VR, and adjust the picture so that the
" " part vertical line may become thinnest.
4. By turning the FOCUS1 VR, and adjust the picture so that the
3rd horizontal line from the upper may become uniform at the
line center and its periphery.
5. Carry out adjustment by repeating the steps 3 and 4 above.
6. Make sure that when the screen is darkened, the lines remain
in good focus.
1 Receive a whole black signal
2 Press the "ZOOM" key and select the FULL mode.
3 Select 2. V/C from the SERVICE MENU.
4 Turn the SCREEN VR clockwise from the full counter
clockwise position and stop it at the point where "CLOW" status
(marked in Fig.) changes from 1 to 0 to 1 (which is
indicated at the 3rd column from the right.)
5 Then turn the SCREEN VR counterclockwise, and stop where
the "CLOW" status changes 1 to 0
＊ "CLOW" : control loopout of window.
No. 52067
Description