LG MX8550 Service Manual page 132

MX8550
Check the voltage at pin 11 of CON201 of key
PCB. Is it 2.6V when you press touch key ?
Check the voltage at pin 11 of CON102 of FPCB.
Check the voltage at pin 29 of CON101 of FPCB.
Check the voltage at pin 29 of CON600 of Main B/D.
LG Electronics Inc.
Checking Flow #2
Checking Flow #2
2
NO
Is it 2.6V when you press touch key ?
NO
Is it 2.6V when you press touch key ?
NO
Is it 2.6V when you press touch key ?
NO
Replace Main B/D
Replace key PCB
YES
Resolder CON201 of key
PCB
YES
Replace FPCB
YES
Resolder CON101 of FPCB
YES
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