JVC AV-21BT8ENS Service Manual page 17

Measuring
Item
instruments
VERTICAL Signal
SIZ E OFFSET gener ator
adjustment
(60Hz) Remote
control unit
Very clos e
Screen
size
Very clos e
VERTICAL Signal
POSITION gener ator
OFFSET
Ad justment Remote
(60Hz) control unit
Test point Ad justment part
VSOF
Picture
size
100%
VPOF
C
D
No. 52054
Description
1. Receive a NTSC-M cross-hatch pattern of vertic al frequency
60Hz.
2. Enter SERVICE MENU.
3. Select VSOF with the FUNCTION ( / ) key.
4. Adjust VSOF with the FUNCTION (
horizontal blac k lines on both the upper and lower part of the
pattern become very clos e to the upper and lower horizontal
sides of picture size and nearly about to disappear.
5. Check and readjust VSOF item if the adjustment becomes
improper after some other geometric adjustments are done.
1. Receive a NTSC-M circ le pattern of vertical frequency 60Hz.
2. Enter SERVICE MENU.
3. Select VPOF with the FUNCTION ( / ) key.
4. Adjust VPOF with the FUNCTION ( / ) key until the picture
is vertically centered.(C=D)
5. Check and readjust v ertical position item if the adjustment
becomes improper after some other geometric adjustments
are done.
AV-21BT8ENS AV-21BT8ENB
AV-21BT8EPS AV-21BT8EPB
AV-21BT8EES AV-21BT8EEB
AV-21BT80EP
/ ) key until the
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