LCD 2009 09 02
Date of Issue: 25
LCD TELEVISION TECHNICAL BULLETIN
Page 1 of 3
Sharp Electronics (UK) Limited
Reference – JW 20090827
Revision - 1
White – Carry out as required
Yellow – Carry out as required and whenever the unit comes in for service
Red – Carry out on all units
SYMPTOM Shuts down due to lamp error (Power LED flashing).
Either lamp or connector problem.
The following steps can be used to disable and reset the lamp protection circuit
allowing fault finding and checking, the part numbers for the lamps and connectors are
Remove the inverter PWB and solder a short lenth of insulated wire link accross
C7558 to disable the lamp protection circuit, as shown in Figure 1.
Refit the inverter PWB.
Bring the set on in “service mode” by inserting the mains cord whilst holding down
both the Input and Volume down buttons on the LCD control panel, The letter “K” will
be displayed on the screen.
Release these buttons.
Press both the Volume down and Channel down buttons on the LCD TV to enter the
service mode see figure 2.
Using the Navigation up/down buttons on the remote select menu level 10/11.
Using Program buttons up/down on the remote control highlight “L ERR (lamp error)”
reset and press “OK” on remote control. see figure 3 any recorded errors should then
reset to 0.
DO NOT ACCESS THE “EEP CLEAR” FUNCTION OR ANY OTHER NOT MENTIONED HERE
AS IT COULD RESULT IN PERMANENT DAMAGE
Using the Navigation buttons on the remote select service menu level 11/11.
Using the Program up/down highlight “Test Pattern”see figure 4 then press the right
navigation button twice to select a grey raster to allow the identification of the faulty
lap /socket see figure 5 the volume up/down could also be used for steping through
all of the test patterns.
When any lamps or sockets has been replaced DON’T FORGET to remove the
service link and exit “K mode” by repeating step 3.