AUD 2012 07 24
Date of Issue: 24
LCD TELEVISION TECHNICAL BULLETIN
Page 1 of 1
Sharp Electronics (UK) Limited
Reference – TSI-1260003
White – Carry out as required
Yellow – Carry out as required and whenever the unit comes in for service
Red – Carry out on all units
REASON Service guide update, additional information to help identify the fault condition when a
unit turns off with the POWER LED indicator blinking.
Error detection indication, Flashing POWER LED (Red colour)
The unit will power off if abnormal operation is detected by the microprocessor i.e.
incorrect power supply rails, over temperature or amplifier overload. The
microprocessor will flash the power LED to indicate the detected fault.
POWER LED Flashing Sequence identification
The power led flashing sequence starts immediately after the error detection forced shutdown
sequence is initiated and is repeated after a 4 second pause (power LED not lit).
The individual errors are identified by using a combination of long (2 second on 1 second off) and
short (4 flashes 0.5 second on 0.5 second off) flashes, the position of the 4 quick flashes from the
beginning of the sequence indicates the detected fault.
The number of long flashes after the quick flashes is not important but you must always ensure you
have counted from the beginning of the sequence i.e. immediately at shut down or after the long
Error 1 Sequence begins 4 quick flashes
Error 2 Sequence begins 1 long flash 4 quick flashes
Error 3 Sequence begins 2 Long flashes 4 quick flashes
Abnormal supply detected
AMP Over Temperature Warning (OTW)
High operating temperature