Category: LED Television Repair and Service
Contents of this article
- How to enter to service mode
- Software update
- Factory reset
Sharp LC-40L500M
Entering and exiting the adjustment process mode
Please execute the following procedures to enter the adjustment process mode when the power supply shuts down.
1) While holding down the “VOL (-)” and “INPUT” keys on the set at once, touch the power supply key on the set.
Please separate the fingers from key on the set when boot-up is confirmed with lighting of a central icon etc.
After a while, The letter “K” appears on the screen. This state is in Inspection mode.
2) 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.
3) 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 controler, once unplug the AC power cord and plug it in again. In this case, wait for 10 seconds or so after unplugging.)
Initialization to factory settings
Factory setting with adjustment process modePlease execute the following procedures to enter the adjustment process mode when the power supply shuts down.
1) While holding down the “VOL (-)” and “INPUT” keys on the set at once, touch the power supply key on the set.
Please separate the fingers from key on the set when boot-up is confirmed with lighting of a central icon etc.
After a while, The letter “K” appears on the screen. This state is in Inspection mode.
2) 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.
3) 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 controler, once unplug the AC power cord and plug it in again. In this case, wait for 10 seconds or so after unplugging.)
Initialization to factory settings
# 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] and press the [OK] key.
# “EXECUTING” display appears.
# When succeeding: Background colour (green)
When failing: Background colour (red)
The following items are initialized in the factory setting.
1) User settings
2) Channel data (e.g. broadcast frequencies)
3) Maker option setting
4) Password data
White Balance Adjustment# Move the cursor to [INDUSTRY INIT] on page 2/21.
# Use the R/C key to select a region from [EUROPE/RUSSIA] and press the [OK] key.
# “EXECUTING” display appears.
# When succeeding: Background colour (green)
When failing: Background colour (red)
The following items are initialized in the factory setting.
1) User settings
2) Channel data (e.g. broadcast frequencies)
3) Maker option setting
4) Password data
For white balance adjustment, adjust the offset values on pages 11/21.
[Condition of the unit for inspection] : Modulated light (+16), Colour temperature (High)
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
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 (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 in the UK setting by inserting CAM
And check the KEY certification by inserting CAM which is prepare for CI+
3. LAN Inspection
After repairing the LAN function, check the communication by connecting PC and LAN terminal.
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 (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 in the UK setting by inserting CAM
And check the KEY certification by inserting CAM which is prepare for CI+
3. LAN Inspection
After repairing the LAN function, check the communication by connecting PC and LAN terminal.
Upgrading the software
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 Menu - Setup - Information - Software 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 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.
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).
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 Menu - Setup - Information - Software 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 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.
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.
# 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 upgrade success screen shows up.
The new software version can be confirmed on screen.
After a while, Turn off power and boot-up automatically.
NOTE: TV is restarted automatically, the AC code need not be pulled out.
The new software version can be confirmed on screen.
After a while, Turn off power and boot-up automatically.
NOTE: TV is restarted automatically, 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.
Select OK when if there is no problem.
Software update is completed, please remove the USB memory device.
