No. 52054
AV-21BT8ENS AV-21BT8ENB
AV-21BT8EPS AV-21BT8EPB
AV-21BT8EES AV-21BT8EEB
AV-21BT80EP
17
Item
Measuring
instruments
Test point
Ad justment part
Description
VERTICAL
SIZ E OFFSET
adjustment
(60Hz)
Signal
generator
Remote
control unit
VSOF
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 ( / ) key until the
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.
VERTICAL
POSITION
OFFSET
Ad justment
(60Hz)
Signal
generator
Remote
control unit
VPOF
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.
Picture
size
100%
Screen
size
Very clos e
Very clos e
C
D