JVC AV-21BT8ENS Service Manual page 19

■ ■ ■ ■ GEOMETRY MENU ADJUSTMENT
Measuring
Item
instruments
VERTICAL Signal
SIZ E gener ator
adjustment
Remote
(50Hz)
control unit
Very clos e
Screen
size
Very clos e
VERTICAL Signal
POSITION gener ator
adjustment
(50Hz) Remote
control unit
HORIZONTAL Signal
POSITION gener ator
adjustment
(50Hz) Remote
control unit
C
Test point Ad justment part
VSIZ
Picture
size
100%
VPOS
A
B
HPOS
D
No. 52054
Description
1. Receive a PAL B/G cross-hatch pattern of vertical frequenc y
50Hz.
2. Enter SERVICE MENU.
3. Press the GREEN then enter the GEOMETRY MENU.
4. Select VSIZ (Vertic al size) with the FUNCTION ( / ) key.
5. Adjust VSIZ with the FUNCTION (
horizontal black lines on both the upper and lower part of the
pattern bec ome very clos e to the upper and lower horizontal
sides of picture size and nearly about to disappear.
6. Check and readjus t VS2B item if the adjustment becomes
improper after some other geometric adjustments are done.
1. Receive a PAL B/G circ le pattern signal of vertic al frequenc y
50Hz.
2. Enter GEOMETRY MENU.
3. Select VPOS (Vertical position) with the FUNCTION ( / )
key.
4. Adjust VPOS with the FUNCTION ( / ) key until the circle
pattern is vertically centered.(A=B)
5. Check and readjust VPOS item if the adjustment bec omes
improper after some other geometric adjustments are done.
1. Receive a PAL B/G circ le pattern signal of vertical frequency
50Hz.
2. Enter GEOMETRY MENU.
3. Select HPOS (Horizontal position)with the FUNCTION ( / )
key.
4. Adjust HPOS with the FUNCTION ( / ) key until the circle
pattern is horizontally centered.(C=D)
5. Check and readjust HPOS 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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