LC-46LE820E (serv.man10). Adjustment - Sharp TV Service Manual (repair manual). Page 8

LC-40/46/52LE820E, LC-40/46LU820E

6 – 8

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 (

)” 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.

    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.

INDUSTRY INIT

Enter

INDUSTRY INIT (-Publicl)

OFF

Public MODE

OFF

Center Acutime
RESET

OFF

Backlight Acutime
RESET

OFF

LAMP ERROR RESET

OFF

Resetting to "0"

ADJ PARAM SET

Enter

VIC XPOS

0

VIC YPOS

0

VIC SIGNAL TYPE

MAIN

VIC READ

OFF