Sharp LC-30AA1M Service Manual page 20

LC-30AA1M
LC-30AA1H
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".
First page of monitor process mode
SERVICE
NOTHING
COMBIAS
NOTHING
→L ERR RESET
LCD
PATTERN
SOUND AND FAN
OTHER
Then perform operation checking and check that the lamp error detection feature is not activated.
30AD1
VER M1.~~ CEEP4
Values specific to each monitor
076
077
064
5
Resetting to "0"
20