Friday, January 15, 2016

SHARP LC-42D43U - LC-52D43U Service mode - Firmware update - White balance adjustment – LCD Television repair and service

Category: LCD Television Repair and service 

Contents of this article 

  • How to enter to Service mode 
  • How to update the firmware 
  • White balance adjustment 



SHARP LC-46D55

Firmware Upgrade Procedure
1. Turn off the AC power (Unplug the AC power cord).
2. Insert the upgrading USB flash memory for upgrade into the service slot.
3. While holding down the power button, plug in the AC power cord of the main unit to turn on the power.
4. Upgrade begins automatically.
After the set starts, the upgrade screen will displayed.
5. If any of the procedures fails, the following upgrade failure screen shows up. For the failing procedure, the “NG” marking turns red.
NOTE: In such case, try to upgrade the software again. If it still fails, the hardware may be in trouble.
6. When all the procedures are complete, the following upgrade success screen shows up. The new software version can be confirmed on screen. The version number appears when each item has been successfully upgraded. Finally the main version number appears on screen.
7. Turn off the AC power (Unplug the AC power cord). Take out the upgrading USB flash memory. It waits for about 20 seconds until the AC power supply is turned off.
8. Now the software has been upgraded.
NOTE: Then get the set started and call the process adjustment screen 1/16 to check the main software version.
CAUTION:
1) Do not take out and put in the USB flash memory during formatting.
2) It takes about one minute to the rewriting completion. Please confirm the upgrade status on the screen becomes 100%.
3) The AC power supply of the set is waited for about 20 seconds until off (The AC outlet is pulled out) after the upgrade is completed.
Entering and exiting the adjustment process mode
1. Unplug the AC power cord of running TV set to force off the power.
2. While holding down the “VOL (-)” and “INPUT” keys on the set at once, plug in the AC power cord to turn on the power.
The letter “K” appears on the screen.

3. Next, hold down the “VOL (-)” and “P (DOWN)” keys on the set at once.
Multiple lines of blue characters appearing on the screen indicate that the set is now in the adjustment Process mode.
If you fail to enter the adjustment process mode (the display is the same as normal startup), retry the procedure.
4. To exit the adjustment process mode after the adjustment is done, unplug the AC power cord to force off the power. (When the power is turned off with the remote controller, once unplug the AC power cord and plug it in again. In this case, wait 10 seconds or so before plugging.)
White balance adjustment
Alignment method:
Initial Set-up:
1. Select source as “YPbPr”.
2. Set Contrast = 58 and Brightness=48, Color=58, backlight=100, at normal menu mode.
3. Apply “80% white pattern or Flat 80 pattern by Component video generator.
4. Enter factory mode menu: press MENU + Numeric keys “1999” + press PRE PR.
Alignment:
1. Apply Flat80 pattern (80% white pattern).
2. Set color temperature to “NORMAL”.
3. At factory mode menu, adjust the Scaler R Gain, Scaler G Gain, Scaler B Gain values to meet “NORMAL” color coordinates specification below. Then store those values to NVM
4. Set color temperature to “COOL”.
5. At factory mode menu, adjust the Scaler R Gain, Scaler G Gain, Scaler B Gain values to meet “COOL” color coordinates specification below. Then store those values to NVM
6. Set color temperature to “WARM”.
7. At factory mode menu, adjust the Scaler R Gain, Scaler G Gain, Scaler B Gain values to meet “WARM” color coordinates specification below. Then store those values to NVM
Color temperature Normal/Warm/Cool (x, y) co-ordinates specification: 
Picture Mode x y
Normal (9000K) - 0.289±0.003 0.291±0.003
Cool (12000K) - 0.272±0.003 0.277±0.003
Warm (6500K) - 0.314±0.003 0.319±0.003
Note:
1. Use Knoica Minolta CS-200 for color coordinates and luminance check.
2. For suitable mass production at factory, colour analyzers CA-210 can be applied. But, befor measureing ,all CA-210 should be coordinates and proofread with a Charoma Meter (CS-200) or equivalent instrument and a reference TV set.
3. Check the luminance at the center of the screen with 100% White. And to set Brightness control at 100; Contrast control at 100; backlight control at 100.
4. The defult values of Scaler R Gain, Scaler G Gain, Scaler B Gain are all 128. When panel WD is made adjustment, the three values could not be over 128. That is preventing color saturation after adjusting Contrast and Brightness setting at main menu.