JVC AV-21BF11ENS Service Manual page 18

AV-21BF11ENS
AV-21BF11EES
AV-21BF11EPS
AV-21BF11EJS
■ ■ ■ ■ GEOMETRY MENU ADJUSTMENT
Measuring
Item
instruments
VERTICAL Signal
SIZ E gener ator
adjustment
(50Hz) Remote
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
18
Test point Ad justment part
VSIZ
Picture
size
100%
VPOS
A
B
HPOS
D
No. 52055
Description
1. Receive a PAL B/G cross-hatch pattern of vertical frequenc y
50Hz.
2. Enter SERVICE MENU.
3. Press GREEN key to enter the GEOMETRY MENU.
4. Select VSIZ (Vertic al size) with the FUNCTION ( / ) key.
5. Adjust VSIZ with the FUNCTION ( / ) key until the screen
the horizontal black lines on both the upper and lower pant of
the pattern become very close 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 bec omes
improper after some other geometric adjustments are done.