JVC AV29A10EUS Service Manual page 22

AV29A10EUS
Measuring
Item
instrument
Adjustment of Signal
SCREEN VR generator
Remote
control unit
V/C
1. RGB BLK
- / +
: STORE
OK
0 0 0 0 0 1 0 0
Screen VR adjustment
IF CIRCUIT CHECKING
Measuring
Item
instrument
Checking of Remote
VCO control unit
IF MENU SCREEN
IF SERVICE MENU
1. VCO
2. ATT ON/OFF
1-2 : SELECT
IF MENU SCREEN
VCO(CW)
MAIN
TOO HIGH
ABOVE REF
JUST REF
BELOW REF
TOO LOW
22
Test point Adjustment part
SCREEN VR
(Within FBT)
PAL
00
i : EXIT
CLOW status
Test point Adjustment part
1.VCO
Do not select
this mode
i : EXIT
****MHz
i : EXIT
No. 51818
Description
1. Input the whole black signal.
2. Press the ZOOM key and select the REGULAR mode.
3. Select 2. V/C from the SERVICE MENU.
4. Turn the SCREEN VR clockwise from the full counterclockwise
position, and stop it at the point where "CLOW" status (marked
in figure) changes from "1" 5 "0" 5 "1" (which is indicated at
the 3rd column from the right).
5. Then turn the SCREEN VR to the counterclockwise, and stop
where "CLOW" status change "1" 5 "0".
Description
" Under normal conditions, no adjustment is required.
Confirmation adjustment.
1. Select 1.IF from the SERVICE MENU.
2. Then select 1.VCO from the IF SERVICE MENU.
3. Receive any broadcast.
4. In the VCO adjustment screen, the yellow allows point to the
characters. Check the allow position where pointed to the
character from "ABOVE REF" to "BELLOW REF".