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ADJUSTMENT OF FOCUS & SCREEN
Measuring
Item
instrument
Adjustment of
Signal
FOCUS
generator
HVT
FOCUS 2 VR
1
2
3
Adjustment of
Signal
SCREEN VR
generator
V/C
1. RGB _ BLK
- / +
: STORE DISP : EXIT
OK
1
0 0 0 0 0 1 0 0
SERVICE MODE SCREEN
Test point
Adjustment part
FOCUS 1 VR(In HVT)
FOCUS 2 VR
(IN CRT SOCKET PWB)
FOCUS 1 VR
SCREEN VR
FOCUS 1 VR
1
2
4
5
3
SCREEN VR
(In HVT)
PAL
00
CLOW
status
1. Receive a cross-hatch signal.
2. Press the ZOOM key and select the regular mode.
3. By turning the FOCUS 1 VR, adjust the to make the vertical
lines as fine and sharp as possible.
4. By turning the FOCUS 1 VR, adjust the picture so that the 5th
vertical line from left side of the cross-hatch picture becomes
thinnest.
5. By turning the FOCUS 2 VR(In CRT SOCKET PWB), adjust
the 3rd horizontal line from the upper side may become
uniform at the line center and its periphery.
6. Carry out adjustment by repeating the steps 3, 4 and 5 about.
7. Make sure that the screen is darkened, the lines remain in
good focus.
1.
Receive a whole black signal .
2.
Press the ZOOM key and select the regular mode.
3.
Select 2. V/C from the SERVICE MENU.
Rotate the SCREEN VR (In HVT) clockwise(from 1 → 0 → 1)
4.
from the full counterclockwise slowly and stop it at the point
where "CLOW" status (marked
0 (which is indicated at the 3rd column from the right.).
*
"CLOW" : control loopout of window.
No. 51809
HV-L34PRO
Description
in Fig.) changes from 1 to
21
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