Sunday, January 10, 2016

SHARP LC-90LE757E - LC-80LE657 - LC-70LE747 Full HD 3D TV Service mode – white balance adjustment – Factory reset – Updating the software – LCD television repair and service

Category: LCD Television Repair and service 

Contents of this article 

  • Access to service mode 
  • Lamp error detection 
  • White balance adjustment 
  • Software Update 

SHARP LC-90LE757E - LC-80LE657 - LC-70LE747

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. This state is in Inspection mode.
3) Next, hold down the "VOL (-)" and "CH ( 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 for 20 seconds or so after unplugging.)
HDMI ROM Writing
After replacing IC2601, execute “HDMI EDID WRITE” on the page 5/21.
Please execute it after checking MODEL NAME & INCH SIZE. are correct.
If MODEL NAME & INCH SIZE. are not correct, set them previously.
The ROM data based on information of MODEL NAME & INCH SIZE.
1) Enter the process adjustment mode in TV.
2) Use the cursor keys (UP/DOWN ) and CH keys (UP/DOWN) of R/C to select the item [HDMI EDID WRITE] on the page 5/21.
3) It is completed with OK displayed.
After replacing the LCD panel or LCD control/MAIN UNIT, check MODEL NAME in the following procedure.
1) Enter the process adjustment mode in TV.
2) Use the cursor keys (UP/DOWN ) and CH keys (UP/DOWN ) of R/C to select the item [MODEL NAME] on the page 21/21.
3) Verify that the Model name is displayed.
4) If the Model name doesn’t match, select the values of the Model name with the VOL keys (+/-).
5) After selection in Step 4), press the OK key, and it is completed with OK displayed.
6) Use the cursor keys (UP/DOWN ) and CH keys (UP/DOWN ) of R/C to select the item [PANEL_SIZE] on the page 21/21.
7) Verify that the panel size is displayed.
8) If the size doesn’t match, select the values of the panel size with the VOL keys (+/-).
9) After selection in Step 8), press the OK key, and it is completed with OK displayed.
10)After setting [MODEL NAME] [PANEL_SIZE], unplug the AC power cord and plug it back in.
3. After replacing the LCD panel or LCD control PWB, adjust the VCOM in the following procedure.
1) Enter the process adjustment mode.
2) Use the cursor keys (UP/DOWN ) and CH keys (UP/DOWN ) of R/C to select the item [VCOM ADJ] on the page 10/21.
3) Press the OK key to verify that the adjustment pattern is displayed.
4) Use VOL keys (+/-) of R/C to adjust the flicker in the center of the screen to minimum.
5) When the optimal state is achieved in Step 4), press the OK key to turn the pattern to OFF.
Lamp Error detection
Function
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 500ms after it is turned on.
(A central icon on the front of the TV flash on and off.: ON for 400ms and OFF for 1600ms.)
2) If the above phenomenon 1) occurs 5 times, it becomes impossible to turn on the power.
(A central icon keep flashing on/off.)
Measures
1) Set the lamp error detection to OFF
Enter the adjustment process mode, referring to “2. Entering and exiting the adjustment process mode”.
The adjustment process mode can ignore “5 times count”, so If the above phenomenon 1) occurs 1~4 times, the lamp will go out.
If Lamp Error detection pin [22pin of PD: P3801/19pin of IC2004] is “High” by a trouble with the lamp and lamp circuit, it can boot-up by the adjustment process mode.
Please execute “Lamp Error detection off-mode”.
Unplug the AC power cord of running TV set to force off the power.
While holding down the “VOL (+)” and “CH ( DOWN )” keys on the set at once, plug in the AC power cord to turn on the power.
After a central icon flash off, separate the fingers from key on the set.
Then, you can check the operation to see if the lamp and lamp circuit are in trouble.
If you fail boot-up, retry the procedure.
2) Resetting the lamp error count
After the lamp and lamp circuit are improved from a trouble, reset the lamp error count.
(Because the power cannot be turned on, if a lamp error is detected 5 consecutive times.)
a) Enter the adjustment process mode, referring to “2. Entering and exiting the adjustment process mode”.
b) Using the cursor (UP /DOWN ) key, move to the cursor to [LAMP ERROR RESET], Line 8 on adjustment process mode service page 2/21.
c) With the cursor ( LEFT/RIGHT ) keys, select the [LAMP ERROR RESET] value.
Finally press the cursor (OK)., the count is reset.
Check LAMP ERROR Count on adjustment process mode Page 2/21.
White balance adjustment
For white balance adjustment, adjust the offset values on pages 11/21.
[Condition of the unit for inspection] : Modulated light (+16)
AV MODE: DYNAMIC
Active Backlight: OFF
OPC: OFF
Asing Time: Min, 60 minute
[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 11/21 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 11/21 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 11/21 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 (Page 21/21) to ON in the process menu to save the white balance adjustment value.
Confirmation item
1. HDMI-CEC Inspection
After repairing the CEC function, check the operation about HDMI-CEC circuit.
2. CI card Inspection
After repairing the CI function, check that the DTV signal is received by inserting CAM.
And check the KEY certification by inserting CAM which is prepare for CI+.
3. LAN Inspection (NET)/test connectivity of SD card.
After repairing the LAN function, check the communication by connecting PC and LAN terminal.
And test connectivity of SD card.
4. 3D Check
5. Bluetooth communication Check / Bluetooth Emitter(Infrared light Output) Inspection.
Factory settings
Factory setting with adjustment process mode
# Enter the adjustment process mode.
# Move the cursor to [INDUSTRY INIT] on page 2/21.
# Use the R/C key to select a region from [EUROPE/RUSSIA/SWEDEN] and press the [OK] key.
# “EXECUTING” display appears.
# After a while, “SUCCESS” display appears, the setting is completed
.
Software update
1. Turn on the AC power.
2. Insert the upgrading USB flash memory for upgrade into the service slot.
(After a while, an external input changes into USB automatically.)
3. Use the Menu button and cursor keys ( LEFT/RIGHT/UP/DOWN ), Ch keys ( UP/DOWN ) of R/C or on the set to select HOME - TV Menu - Setup - Information - Software update - USB update on OSD menu.
4. The message (Insert the USB memory device contains the software update file) shows up. Push OK when if there is no problem.
5. After a while, if software update file is detected in the USB memory device, the following screen shows up.
Select OK when if there is no problem.
NOTE: If USB memory device isn’t correctly inserted in TV, caution shows up.
Please insert USB memory device and retry software update.
NOTE: If there are more than two software update files in the USB memory device, caution shows up.
Please insert one file and retry software update.
NOTE: If there is no software update file in the USB memory device, caution shows up.
Please insert the correct file and retry software update.
NOTE: If software update file in the USB memory device doesn’t mutch this model, caution shows up.
(Because Model name is unmatched or check sum error occurs.)
Please insert the correct file and retry software update.
NOTE: If software update file in the USB memory device is already installed, caution shows up.
Please reconfirm the software version and reinstall. (if necessary)
6. The caution for update showes up.
# The picture will temporary go dark until the software update display apeeares.
# Wait several minutes and don’t unplug the AC cord.
Select OK when if there is no problem.
7. Software update starts.
Please wait for a while until the bar shows 100%.
NOTE: Do not take out the USB memory device during updating.
8. When all the procedures are complete, the following upgrade success screen shows up.
The new software version can be confirmed on screen.
After a while, Turn off power and boot-up automaticaly.
NOTE: TV is restarted automaticaly, the AC code need not be pulled out.
9. After boot-up, the following caution shows up.
Select OK when if there is no problem.
Software update is completed, please remove the USB memory device.