Wednesday, January 20, 2016

SANYO LCD-32XH4 Service modes - White balance adjustment - power supply circuit – LCD television Repair and service - Manual Service

Category: LCD Television Repair and Service 

Contents of this article 

  • How to enter to service mode 
  • White balance adjustment 
  • Power supply circuit  


Service Menu System
Quick operation is needed to enter Service Mode.
How to enter the Service Menu
1. Press and hold the MENU button on Side Controls.
2. Keep pressing the MENU button and press the NUMERIC "1" button on the remote control, and the service mode 
menu will be displayed.
How to select the service item and adjust data:
To adjust data:
1) Select “DATA” line by pressing UP or DOWN button.
 2) Press + or - button to adjust data.
To exit service mode
1. Press MENU button on the Side Controls or remote control.
2. Turn the TV off by pressing the POWER ON/OFF button on the Side Controls or remote control.
Note: The all adjusted data in service mode will be memorized into EEPROM automatically.
Service Adjustments
Setting the Initial data
This adjustment is controlled by the CPU (IC7200) through the IIC Bus Data Line in the chassis, and those adjustment data are memorized the memory IC (IC8002). Therefore, Main board or the memory IC (IC8002) is replaced, these data will be disappeared. Readjust should be made. Initial data is provided in the CPU ROM, when the memory IC (IC8002) 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 Service Adjustment Data Table. If it is different, change to correct data
4. Exit the Service Mode.
White balance Adjustment
White Pattern 100% (in AV mode).
Picture Mode: STANDARD
Color Temperature: NORMAL
Pre-heating Time: More than 10 minutes
1. Enter the Service Mode.
2. Select "Source ALL" by pressing V +/V- or button, and select "Properties White" by pressing V+/V-or button.
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).
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.