Wednesday, January 06, 2016

SHARP lcd Television LC-52D65E How to enter to Service mode white balance adjustment and firmware update

Category: LCD Television Repairing   

Contents of this article 

  • Service mode
  • White balance adjustment 
  • Updating the firmware 


Service mode 
How to enter to service mode (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.)
Lamp error detection
This LCD color TV set incorporates a lamp error detection feature that automatically turns off the power for safety under abnormal lamp or lamp circuit conditions. If by any chance anything is wrong with the lamp or lamp circuit or if the lamp error detection feature is activated for some reason, the following will result.
1) The power is interrupted in about 6 seconds after it is turned on.
(The power LED on the front of the TV set turns red from green and keeps blinking in red: ON for 300ms and OFF for 1500ms.).
2) If the above phenomenon 1) occurs 5 times consecutively, it becomes impossible to turn on the power. (The power LED remained red).
1) Checking with lamp error detection OFF
Enter the adjustment process mode, referring to 2. Entering and exiting the adjustment process mode. If there is a problem with the lamp or lamp circuit, the lamp will go out. (The power LED is green.) Then, you can check the operation to see if the lamp and lamp circuit are in trouble.
2) Resetting the lamp error count
After the lamp and lamp circuit are found out of trouble, reset the lamp error count. If a lamp error is detected five consecutive times, the power cannot be turned on. Using the cursor (UP /DOWN ) key, move to the cursor to [LAMP ERROR RESET], Line 8 on adjustment process mode service page 2/16. With the cursor (</>) keys, select the [LAMP ERROR RESET] value. Finally press the cursor (OK) eys to reset the value to “0”.
White Balance Adjustment
For white balance adjustment, adjust the offset values on pages 12/16.
[Condition of the unit for inspection] : PC mode, Modulated light (+16), Color temperature (High)
[Input signal condition] : HDMI 1080i 15IRE (LO), 78IRE (HI)
[Adjustment reference device] : Minolta CA-210
[Adjustment procedure]
1) Display the current adjustment status at R/G/B_GAIN (HI). (Page 12/16 of process adjustment) The signal of 78IRE is input.
2) Read the value of the luminance meter. x=0.272, y =0.277
3) Change R_GAIN (HI)/B_GAIN (HI) (Adjustment offset value) on page 12/16 of process adjustment so that the values of the luminance meter approach x=0.272 and y =0.277.
(Basically, G is not changed. If adjustment fails with R and B, change G. When G is lowered, the weaker of R or B must be fixed.)
4) Display the adjustment status of the current R/G/B_GAIN (LO). The signal of 15IRE is input.
Change R_GAIN (LO)/B_GAIN (LO) (adjustment offset value) on page 12/16 of process adjustment so that the values of the luminance meter approach x =0.272 and y = 0.277.
5) Both HI and LO are repeating the step from 1 to 4 until becoming an aim value.
[Adjustment reference standard value]
Adjustment spec ± 0.002 Inspection spec ± 0.004 (point LO)
Adjustment spec ± 0.001 Inspection spec ± 0.002 (point HI)
6) After completing adjustments, set EEP SAVE (16/16) to ON in the process menu to save the white balance adjustment value.
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 is displayed.
5. If any of the procedures fails, the 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 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.
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.