Sharp Aquos LC-20S4E, Service Manual

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LC-20S4E
ADJUSTING PROCEDURE OF EACH SECTION
The best adjustment is made before shipping. If any position deviation is found or after part replacement is
performed, adjust as follows.
Preparation for adjustments
Use a stable AC power source.
LC-20S4E
AC Power : 230V
1. Adjusting procedure
Complete Set
→
Power ON
→
Enter Adjustment Process Mode (By Remote Control)
→
RF AGC adjustment
→
DCXO adjustment
→
Common Bias adjustment
→
White Balance adjustment
2. Entering the adjustment process mode
• After power on, press the adjustment process mode key on the service remote control.
• Switching on the TV set, holding pushed the "Input" and "Volume (–)" key at once, the TV set enters in the "K"
mode.
In this condition, pushing "Volume (–)" and "P (
Ù
)" key, the adjust mode appears.
3. Key operation in the adjustment process mode
• Use the "UP" or "DOWN" cursor key to select the adjustment mode item.
• Use the "LEFT" or "RIGHT" cursor key to change the data.
4. Initialization
When the EEPROM (IC101) has been replaced or when the EEPROM has been initialized, readjust the each
adjust the each adjustments.
4-1. When the EEPROM has been replaced:
1) Plug in the AC cord to an AC power outlet and turn on the power.
2) When the setting is finished, the LED turns from red to green. In about 15 seconds, the initialization is
completed.
4-2. When initializing the EEPROM data and making readjustments:
1) Enter the Adjustment Process mode.
2) Select the INIT TV item and press the "RIGHT" cursor key to enable the item.
3) Unplug the AC cord and plug it again in the AC power outlet. Turn on the power.
4) When the setting is finished, the LED turns from red to green. In about 5 seconds, the initialization is
completed.
<Note>
When the INIT TV item has been enabled in the adjustment process, be sure to unplug the AC cord and plug it in
again. Then start adjustments. Otherwise the readjusted data cannot be put in memory.
4-3. Setting the screen size (inches)
1) Enter the Adjustment Process mode.
2) Check the model number.
3) Hold down the "LEFT" or "RIGHT" cursor key longer than 2 seconds, and select a screen size (20).
S4E Main Ver
*.**
Scaler Ver *.**.**
INCH SIZE 20