LG MX8550 Service Manual page 109

MX8550
2
YES
Check audio signal at C 519, C520
YES
Check the audio signal at C
YES
Check the audio signal at C
YES
Check the soldering of CON
Pin4, 5 of CON 400
Replace Main B / D
LG Electronics Inc.
Checking Flow: Headset receiving path problem
Checking Flow: Headset receiving path problem
NO
537 , C538
NO
427, C428
NO
401 or
NO
Check the soldering at
C519, C520
YES
Check the soldering at
C537, C538
YES
Resolder C 537, C538
Check the voltage at
R526 whether it is 2.6V
YES
Resolder R 526
Resolder CON 4 01 or CON 400
Redownload S / W
NO
Resolder C 519. C520
Resolder U 516
with heat gun
NO
NO
Replace U516
Resolder U 518
with heat gun
NO
NO
Replace U518
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