LG 22LH250C (CHASSIS:LD91Z) Service Manual ▷ View online
Making
Revision
2009. 2 . 1
LCD TV
Symptom
RJP Problem
Check the “RJP” item
on SVC Menu
YES
Check the supply 12V power
of RJP.(JK409_Pin1)
YES
NO
Replace the “RJP” item
from No to Yes .
NO
Check the supply power.
Replace JK409
Check the JK409
NO
19~42LH250C
Making
Revision
2009. 2 . 1
LCD TV
Symptom
IR Out Problem
Check the RS-232C Pin4 / HDMI Pin14
Check the IR waveform
of R1300
YES
NO
Replace it
Check the IR waveform
of IC1100_3,6,11Pin
YES
NO
Replace the Preamp of IR ass’y.
NO
Re-soldering or replace
the defect part
19~42LH250C
Making
Revision
2009. 2 . 1
LCD TV
Symptom
Buzzer Problem
Check the IC 904 & BU900
Check the “Time” item
on user Menu
YES
NO
Replace it
Check the “Time” item
on user Menu
YES
NO
Check the current time establishment
on “Time” item of user menu
NO
Set to “Alarm Time”
19~42LH250C
Making
Revision
2009. 2 . 1
LCD TV
Symptom
External Speaker Problem
IC702 operate
normally?
Check the input
source
YES
NO
Re-solder or Replace
the IC702
IC100 operate
normally?
YES
NO
Change input source.
NO
Re-solder or replace
the IC100
Replace it
Replace the external speaker.
Check JK406
Check the external
speaker
NO
NO
YES
YES
19~42LH250C