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AV21BT7ENS / AV21BT7ENB
AV21BT7EPS / AV21BT7EPB
AV21BT7EES / AV21BT7EEB
Measuring
Item
instruments
WHITE
Signal
BALANCE
generator
AGC
DC
Adjustment
voltmeter
IF-PLL
NEGATIVE
Adjustment
IF-PLL
POSITIVE
Adjustment
12
Test point
Adjustment part
ADJUST 00
(White point
- RED)
ADJUST 01
(White point
- GREEN)
ADJUST 02
(White point
- BLUE)
ADJUST 03
ADJUST 04
ADJUST 05
No. 51878
Description
[LOW LIGHT]
1. Receive a whole black signal.
2. Adjust the <Adjust 00>, <Adjust 01>, <Adjust 02>, in the
SERVICE MENU so that the entire screen do not shine black.
[HIGH LIGHT]
1. Receive a white and black signal (colour off).
2. Adjust the <Adjust 00>, <Adjust 01>, <Adjust 02>, in the
SERVICE MENU so that the whiteness in the screen become
sharp.
1.
Receive a any broadcast.
2.
Select <ADJUST 03> from SERVICE MENU
3.
Connect a DC voltmeter to pin 1 of the tuner. Change the
AGC parameter until you see 3.70VDC on voltmeter display.
1.
Select <ADJUST 04> from SERVICE MENU.
2.
Adjustment value is set to 80 as a default value.
1.
Select <ADJUST 05> from SERVICE MENU.
2.
Adjustment value is set to 80 as a default value.
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