Sharp LC-LE831E Series Training Notes page 72

Service Mode
5. Lamp Error Detection
1. Function
This LCD colour 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.)
2. Measures
1) Set the lamp error detection to OFF
Enter the adjustment process mode, referring to "4. 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 [4pin of PD: P9602/19pin of IC2001] 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".
While holding down the "VOL (-)" and "CH ( UP)" keys on the set at once, touch the power supply key on the set.
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.
July 2011
Issued by:
CE After Sales Service