Lamp Error Detection - Sharp LC-60LE822E Service Manual

LC-60LE822E/LC-60LE822ERU

9. 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 rea-
son, 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 (6pin of LB: P9602) 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 (
After a central icon flash off, separate the fingers from key on the set.
Touch the power supply key on the set again, so the power will boot-up.
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 "4. Entering and exiting the adjustment process mode."
b) Using the cursor ( / ) key, move to the cursor to [LAMP ERROR RESET], Line 8 on adjustment process mode service page 2/21.
c) With the cursor ( / ) 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.
Table of contents of adjustment process mode Page 2/21
INDUSTRY INIT
INDUSTRY INIT (-Publicl)
Public MODE
Center Acutime
RESET
Backlight Acutime
RESET
LAMP ERROR RESET
ADJ PARAM SET
VIC XPOS
VIC YPOS
VIC SIGNAL TYPE
VIC READ
)" keys on the set at once, touch the power supply key on the set.
Enter
OFF
OFF
OFF
OFF
OFF Resetting to "0"
Enter
0
0
MAIN
OFF
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