LG 42LE5350 - Page 72

Check RF Cable & Signal
Check Tuner 3.3V Power
L701
Replace L701
Check Tuner 1.2V Power
IC700 2 pin : 1.2V
Replace IC700.
ok
ok
No
No
Check Tuner 5V Power
L700
ok
Check IC8003
No
Replace IC8003
No
Replace L8007
ok
13. Trouble shooting - No audio (Analog TV audio)
Check TU_SIF path
Including Q701 TR buffer to LGE3549
ok
Check SIF Signal
TU700 9th Pin
ok
No
Bad Tuner. Replace Tuner.
Follow procedure
‘8. All source audio’
trouble shooting guide.
ok
No
Replace component
Copyright ⓒ 2010 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only