JVC AV-21BT8ENS Service Manual page 16

AV-21BT8ENS AV-21BT8ENB
AV-21BT8EPS AV-21BT8EPB
AV-21BT8EES AV-21BT8EEB
AV-21BT80EP
■ ■ ■ ■ AGC AUTOMATICALLY ADJUSTMENT
Measuring
Item
instrument
AGC Remote
AUTOMATIC- control unit
AL LY
adjustment
& check
SERVICE MENU SCREEN
■ ■ ■ ■ DEFLECTION CIRCUIT ADJUSTMENT
Measuring
Item
instrument
VERTICAL Signal
LINEARITY gener ator
adjustment
Remote
control unit
RGB MODE Signal
HORIZONTAL gener ator
SHIFT
OFFSET Remote
adjustment control unit
A
16
Test point Ad justment part
AGC
IF INDICATOR
Test point Ad justment part
VLIN
RGBH
B
No. 52054
1. Enter SERVICE MENU.
2. Receive a 60dBμV RF signal level.
3. Select AGC with the FUNCTION ( / ) key.
4. Press BLUE key on the remote control unit.
5. Then the adjustment will be done automatically by software.
6. See the AGC indicator on SERVICE MENU, it must be "1".
7. Check that picture is normal at 90dBμV signal level.
: 1
AGC INDICATOR
1. Receive a PAL B/G circle pattern.
2. Enter SERVICE MENU.
3. Select VLIN with the FUNCTION ( / ) key.
4. Adjust VLIN with the FUNCTION ( /
round as possible.
1. Input R/G/B circle pattern signal via video input terminal.
2. Press AV key on the remote control unit, force the TV to RGB
mode.
3. Enter SERVICE MENU.
4. Select RGBH with the FUNCTION ( / ) key.
5. Adjust RGBH with the FUNCTION ( / ) key until the circle
pattern is horizontally centered.(A=B)
6. Check and readjust RGBH item if the adjus tment becomes
improper after some other geometric adjustments are done.
Description
1
NONE
Description
) key until circle as