LG MX8550 Service Manual page 124

MX8550
8, 9, 10 of CON201 of key PCB. Is there
8, 9, 10 of CON102 of FPCB. Is there any
~ 27 of CON600 of Main B/D. Is there any
LG Electronics Inc.
Checking Flow #4
Checking Flow #4
4
Check the voltage at pin 7,
any pulse or something?
NO
Check the voltage at pin 7,
pulse or something?
NO
Check the voltage at pin 24
~ 27 of CON101 of FPCB. Is there any
pulse or something?
NO
Check the voltage at pin 24
pulse or something?
NO
Replace Main B/D
Replace U101 of key PCB
YES
Resolder CON201 of key
PCB
YES
Replace FPCB
YES
Resolder CON101 of FPCB
YES
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