Service Adjustments - Sanyo LCD-42XF7 Service Manual

CAUTION !
Do not attempt to adjust service adjustments not listed below otherwise it may cause loss of performance and for
correct operation.
This adjustment is controlled by the CPU (IC8001) through the IIC Bus Data Line in the chassis, and those adjustment
data are memorized the memory IC (IC8000). Therefore, Main board or the memory IC (IC8000) is replaced, these
data will be disappeared. Readjust should be made. Initial data is provided in the CPU ROM, when the memory IC
(IC8000) is replaced with new one. CPU ROM data is loaded into the memory. Initial data is provided to operating the
monitor basically. For operating the monitor quality performance, further adjustment is required following chassis elec-
trical adjustment.
1. Receive good quality signal.
2. Enter the Service Mode.
3. Confirm data value to be the same as the
4. Exit the Service Mode.
Pattern
Condition
Picture Mode: STANDARD
Color Temperature: NORMAL
Pre-heating Time: More than 10 minutes
1. Enter the Service Mode.
2. Select WHITE BALANCE / BLACK BALANCE by pressing
3. Set R,G,B value to "FF" by pressing NUMERIC buttons.
To adjust Red : Press 1 (data value up) and 4 (data value down).
To adjust Green : Press 2 (data value up) and 5 (data value down).
To adjust Blue : Press 3 (data value up) and 6 (data value down).
WHITE BALANCE ADJUST
RED GREEN
75 70
4. Decide one item in three items to a fixed value (For example, let R be fixed value), select item of other 2 colors
(Example, G or B), and adjust to produce a normal black and white picture in highlight areas.
(Note: At this time, Adjust the other 2 colors data less than fixed data.)
5. Exit the Service Mode.
After adjustment, confirm white balance again by normal picture.
BLUE
71
-20-
. If it is different, change to correct data
button, and press
BLACK BALANCE ADJUST
RED GREEN
80 80
button to enter.
BLUE
80