Service Adjustments - Sanyo LCD-32XL2 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-N colour bar pattern.
(ANT Input Level: 62dBµV 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 item Write 1 of TDA9885 with
5. Adjust voltage of Tuner-AGC to become 3.2V±0.3V DC
with VOLUME + or - key.
TDA9885
Write 1
Black Balance Adjustment
[ Setting ]
1. Connect a color-bar generator to the external
(composite) video input terminal (AV1 or AV3 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, and select item "Other"
with or key, then press the VOLUME + or - key to
enter the Sub menu.
Adjustment Item:
No. 58 Black Balance R
No. 59 Black Balance G
No. 60 Black Balance B
2. Set 58 Black BalR, 59 Black BalG and 60 Black
BalB value to "255" with VOLUME + or - key.
58 Black BalR
Item No.
Item
or key.
FE
10
Data Value
Item No.
255
Data Value
3. Decide one item in three items to a fixed value
(Example, let 58 Black BalR be fixed value), select
item of other 2 colors (Example, 59 Black BalG or
60 Black BalB) with
produce a normal black and white picture in dark gray
areas with VOLUME + or - key.
(Note: At this time, Adjust the other 2 colors data less
than fixed data.)
After adjustment, confirm white balance again by
normal picture.
White Balance Adjustment
[ Setting ]
1. Connect a color-bar generator to the external
(composite) video input terminal (AV1 or AV3), and
input a White Pattern (90%).
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, then press the VOLUME + or - key
to enter the Sub menu.
Adjustment Item:
No. 55 White Balance R
No. 56 White Balance G
No. 57 White Balance B
2. Set 55 White BalR, 56 White BalG and 57 White BalB
value to "32" with VOLUME + or - key.
55 White BalR
Item No.
Item
3. Decide one item in three items to a fixed value
(Example, let 55 White BalR be fixed value), select
item of other 2 colors (Example, 56 White BalG or 57
White BalB) with
normal black and white picture in highlight areas with
VOLUME + or - key.
(Note: At this time, Adjust the other 2 colors data less
than fixed data.)
After adjustment, confirm white balance again by
normal picture.
-13-
or key, and adjust to
32
Data Value
or key, and adjust to produce a