LG 55LD650H (CHASSIS:LA05A) Service Manual ▷ View online
Check JK1702.
Can you see the normal waveform?
Can you see the normal waveform?
JK1702 may have problem. Replace this Jack.
Check the input (Pin AE17,AD17,AC17) of BCM3563(IC101).
Measure waveform at C1114, C1115
,
C1116
because it’s more easy to check.
Can you see the normal waveform?
Can you see the normal waveform?
This board has big problem because Main chip(BCM3549)
have some troubles.
After checking thoroughly all path once again, You should
decide to replace BCM3549 or not.
have some troubles.
After checking thoroughly all path once again, You should
decide to replace BCM3549 or not.
Component Video Trouble shooting guide
YES
YES
NO
RGB-PC Video Trouble shooting guide
Check P1700.
Can you see the normal waveform?
Can you see the normal waveform?
YES
P1700 may have problem. Replace this Jack.
This board has big problem because Main chip(BCM3549) have some troubles
After checking thoroughly all path once again, You should decide to replace BCM3549 or not.
After checking thoroughly all path once again, You should decide to replace BCM3549 or not.
YES
NO
Check the input (Pin AB12,AC11,AF11)
of BCM3563(IC101).
Measure waveform at C1111, C1112,C1113
because it’s more easy to check.
Can you see the normal waveform?
of BCM3563(IC101).
Measure waveform at C1111, C1112,C1113
because it’s more easy to check.
Can you see the normal waveform?
HDMI Video Trouble shooting guide
Check input connect JK201,JK202
Can you see the normal waveform?
Can you see the normal waveform?
JK201,JK202 may have problem. Replace this Jack.
Check HDCP communication lines(IC100)
After checking the Power of this chip, you should decide to replace this
or not.
or not.
YES
NO
NO
Analog RF Audio Trouble shooting guide
Check TU100 Pin13(SIF)
Can you see the normal signal?
Can you see the normal signal?
Check the input (Pin AD19) of BCM3549((IC100).
Measure waveform at C636 because it’s more easy to check.
Can you see the normal waveform?
Measure waveform at C636 because it’s more easy to check.
Can you see the normal waveform?
YES
NO
Could you measure voltage of TU100& IIC lines?
Are they all normal?
Are they all normal?
NO
You should check power line
& IIC lines.
& IIC lines.
YES
You should replace
TUNER.
TUNER.
NO
After checking audio signal line, you should decide to replace item or
not.
not.
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