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MX8550
2
Check the voltage at R128.
Is it +VPWR level?
YES
Check the signal at C134.
Is it High level?
YES
Check the signal at C145, 146,
147, 148. Is it High level?
Replace U101
Wheel light will work properly
LG Electronics Inc.
Checking Flow #2
Checking Flow #2
Check the voltage at pin 50,
51 of CON201 of key PCB. Is
NO
it +VPWR level?
3
NO
Check the voltage level at
pin50, 51 of CON102 of FPCB. Is
It +VPWR level?
4
NO
Check the voltage level at
pin 54, 55, 56 of CON101 of FPCB. Is
It +VPWR level?
Check the voltage level at
pin 54, 55, 56 of CON600 of Main B/D. Is
It +VPWR level?
Replace Main B/D
NO
YES
YES
NO
YES
NO
Resolder CON101 of FPCB
YES
NO
Resolder CON201 of key
PCB
Replace FPCB
- 121/148
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