LC-15M4E (serv.man2). - Part 1 - Text (1-16) - Sharp TV Service Manual (repair manual). Page 12

Function
For added safety, this LCD color TV set has the lamp error detection function. The power is automatically turned off
if the lamp or its circuit gets in trouble.
If by any chance there is a problem with the lamp or its circuit, or if the lamp error detection function is activated for
any other reason, the set behaves itself as follows.

1

Even when you switch on the power, the set turns itself off in about 5 seconds. (The power LED indicator on
the front of the set turns from green to red.)

2

If the above action 

1

 occurs 5 times consecutively, the set cannot be switched on. (The power LED indicator

stays in red.)

Correction
Checking with the lamp error detection circuit off
If the lamp error detection function is activated to turn off the power, the power LED indicator turns red and the set
is now in the adjustment process mode. In this state, the error detection circuit gets disabled and the power is
turned on again. In so doing, the lamp and its circuit can be checked for anything unusual.
Check to see if “1” or higher value appears in the “ERROR NO RESET” box in the 7th line of the adjustment
process page 1. If so, a lamp error has been detected.

Resetting the lamp error counter
Finally make sure the lamp and its circuit are error-free, and reset the lamp error counter. To do so, select the
“ERROR NO RESET” box in the 9th line of the adjustment process page 1 and enter “0” with the VOL button.
Do the performance check and make sure the lamp error detection function is not activated.

»

When you have modified the MODEL and INCH SIZE settings on the process page 1, never turn off the power
in at least 5 seconds. It takes this time to write the EEPROM for all the adjustment process parameters of a
different model. (The cursor does not move for a few seconds when the writing is going on.) If you have wrongly
turned off the power, once change the MODEL setting to any other model number, wait for 5 seconds, and
change the setting back to the right model number. Then wait for another 5 seconds just to be sure.

»

To quit the adjustment process mode with adjustments complete, use the ADJUST PROCESS key on the
remote controller.

1
> + B - A D J

M O D E L
I N C H   S I Z E
T I M E R
S Y S T E M
N T S C

P WM   F R E Q

P A L   P WM   F R E Q
T V   G A I N
E R R O R   N O   R E S E T
P M U T E
P U B L I C   M O D E

1 5 M 4

V E R

1 . 0 1

0

1 6 0
M 4 E
1 5
1
A U T O
0 C 0
0 B 0
O F F
0
0 0
O N

Adjustment process page number

Adjustment process settings

Adjustment process items

Microprocessor version