LC-30AD1E (serv.man7). adjustment procedures - Sharp TV Service Manual (repair manual). Page 4

Lamp error detection

1. Feature description

This liquid-crystal color TV incorporates a lamp error detection feature (lamp error detection) that automatically
turns OFF the power for safety under abnormal lamp or lamp circuit conditions.
If anything is wrong with the lamp or lamp circuit or the lamp error detection feature is activated for some
reason, the following will result.

1

The power of TV main body is turned OFF about 13 seconds after it is turned ON.  (The power LED on
the front of the TV turns red from green and keeps blinking in red (ON for 250ms and OFF for 1sec).)

2

If 

1

 occurs five times consecutively, it becomes impossible to turn ON the power.  (The power LED

keeps blinking in red (ON for 250ms and OFF for 1sec).)

2. Measures

2-1.Checking with lamp error detection OFF

Disconnect the cable connected to the AVC System  Turn OFF the monitor main power.  Turning ON the
monitor main power while pressing the "INPUT" key and "VOL (–)" key together will establish the "Monitor
Process" mode ("<K>" is displayed).
Then, pressing any key will bring you to the first page of the "Monitor Process" mode.
This allow you to check the lamp and lamp circuit for abnormal conditions.
Check that "L ERR RESET" on the fourth line of the first page of the "Monitor Process" mode is 1 or more.
If it is 1 or more, a lamp error has been detected.

2-2.Reset of lamp error count

After checking the lamp and lamp circuit for abnormal conditions, reset the lamp error count.  Move the
arrow to "L ERR RESET" on the fourth line of the first page of the "Monitor Process" mode with the cursor
UP/DOWN key and select the numeric value of "L ERR RESET" with the cursor RIGHT/LEFT key.  In this
state, press the cursor UP/DOWN key to reset it to "0".

Then perform operation checking and check that the lamp error detection feature is not activated.

First page of monitor process mode

Values specific to each monitor

Resetting to "0"

SERVICE
   GRAYLEVEL
   COMBIAS
   VLSBIAS

→

L ERR RESET

   LCD
   PATTERN
   SOUND AND FAN
   OTHER
     VER M1.

~~  

CEEP4

30AD1E

076
077
064
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