Service Adjustments - Sanyo LCD-32XA2 Service Manual

Service Adjustments

Important Notice:
Do not attempt to adjust service adjustments not listed below otherwise it may cause loss of performance and for
correct operation.
AGC Adjustment
1. Receive PAL colour bar pattern.
(ANT Input Level: 58dBµV 75 ohms terminated)
2. Connect a Digital Volt Meter to Tuner-AGC terminal
(TP-A) and the ground.
3. Enter the Service Mode, and select item TDA9885
with or key.
4. Select sub menu Write 1 of TDA9885 with
5. Adjust voltage of Tuner-AGC to become 3.2V±0.3V DC
with or key.
White Balance Adjustment
[ Setting ]
1. Connect a colour-bar generator to the external
(composite) video input terminal (AV1, AV2, AV3 or
AV4 terminal), and input a White Pattern (100%).
2. Set the television to following conditions:
Picture Mode: Dynamic
Pre-heating Time: More than 10 minutes
[ White Balance Adjustment ]
1. Enter the Service Mode, and select item Other
with or key.
Adjustment Item:
No. 55 White balance R
No. 56 White balance G
No. 57 White balance B
2. Set No. 55 White balance R value to "32" with
key.
Set 56 White balance G value to "32" with
Set 57 White balance B value to "32" with
3. Decide one item in three items to a fixed value
(Example, let No. 55 White balance R be fixed value),
select item of other 2 colours (Example, No. 56 White
balance G or No. 57 White balance B) with
key, and adjust to produce a normal black and white
picture in highlight areas with
After adjustment, confirm white balance again by
normal picture.
or key.
or
or key.
or key.
or
or key.
-11-
Black Balance Adjustment
[ Setting ]
1. Connect a colour -bar generator to the external
(composite) video input terminal (AV1, AV2, AV3 or AV4
terminal), and input a dark gray pattern (10% white).
2. Set the television to following conditions:
Picture Mode: Dynamic
Pre-heating Time: More than 10 minutes
[ Black Balance Adjustment ]
1. Enter the Service Mode.
Adjustment Item:
No. 58 Black Balance R
No. 59 Black Balance G
No. 60 Black Balance B
2. Set No. 58 Black Balance R value to "251" with
key.
Set No. 59 Black Balance G value to "0" with
key.
Set No. 60 Black Balance B value to "253" with
key.
3. Decide one item in three items to a fixed value
(Example, let No. 58 Black Balance R be fixed value),
select item of other 2 colours (Example, No. 59 Black
Balance G or No. 60 Black Balance B) with
key, and adjust to produce a normal black and white
picture in dark gray areas with
After adjustment, confirm white balance again by
normal picture.
or
or
or
or
or key.