LG 47LF11 (CHASSIS:LA92G) Service Manual ▷ View online
C
2009
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5. RGB Video
Check input signal format.
Is it supported?
OK
Check RGB Cable connectors for
damage.
OK
Check JK1201
NO
Replace Jack.
OK
Check EDID
NO
Re-download EDID data.
OK
Check signal R/G/B/H/V-Sync
R1234/1235/1236/1233/1232
NO
Check other set.
If no problem, check signal
line
OK
Check Mstar LVDS output
NO
Replace Mstar(IC100)
or Main board
6. AV Video
Check input signal format.
Is it supported?
OK
Check AV Cable for damage or
open connector.
OK
Check JK1206,JK1202
NO
Replace Jack.
OK
Check Mstar LVDS output
NO
Replace Mstar(IC100)
or Main board
C
2009
- 22 -
7. HDMI Video
Check input signal format.
Is it supported?
OK
Check HDMI Cable for damage or
open connector.
OK
Check JK500,501,502,503
NO
Replace Jack.
OK
Check EDID
NO
Re-download
EDID data.
OK
Check HDCP key NVRAM(IC105)
power & I2C Signal (pin 5, 6)
NO
Replace the defective IC.
OK
Check HDMI Signal
NO
Check other set.
If no problem, check signal
line.
NO
Replace Main board
OK
Check Mstar LVDS output
NO
Replace Mstar(IC100)
or Main board
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C
2009
8. All Source Audio
Make sure you
can t hear any audio.
OK
First check the TV SPEAKER Menu
(Menu > Sound > TV Speaker)
NO
Toggle the menu
OK
Check Mstar
AUDIO_MASTER_CLK
R603
NO
Replace Mstar(IC100)
or Main board
OK
Check Mstar I2S Output
R604, R605, R606
NO
Check signal line
Or replace IC100
Or replace IC100
OK
Check IC600 Power
*20V, 3.3V, 1.8V.
NO
Check Regulaor
IC601.IC704
OK
Check Output Signal
P600 1,2,3,4 PIN
NO
Replace NTP(Audio AMP)
IC600
OK
Check Connector & P600
NO
Replace connector
if found to be damaged.
OK
Check speaker resistance
and connector damage.
NO
Replace speaker.
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C
2009
9. Digital TV Audio
Check Tuner 5V Power
TU1001 4Pin
NO
Check IC1002
19/22inch model check
IC1005
OK
Check IF_P/N Signal
NO
Replace Tuner.
OK
Check Check Demodulator Input
Clock(X1005-25MHz)
NO
Replace X1005
OK
Check IC1004(LGDT3305) Output
- AR1070, AR1071
NO
Replace IC1004
OK
Check Output Signal
P600 1,2,3,4 PIN
NO
Replace NTP3100L
(Audio AMP) IC600
OK
Check Connector & P600
NO
Replace connector
if found to be damaged.
OK
Check speaker resistance
and connector damage.
NO
Replace speaker.
10. Analog TV Audio
Check Tuner 5V Power
TU1001 4Pin
NO
Check IC1002
Check IC1005(19",22")
NO
Bad Tuner. Replace
Tuner.
OK
Check SIF buffer signal.
NO
Check SIF Signal line.
OK
Follow procedure All source audio
trouble shooting guide.
NO
Replace Mstar(IC100)
or Main board
Check RF Cable
OK
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