LG SPJ2B-W - Portable Function

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ELECTRICAL TROUBLESHOOTING GUIDE
4. PORTABLE FUNCTION
YES
YES
YES
YES
YES
Portable function
OK
Replace the related part.
Refer to
Power part troubleshooting.
Check IC301.
Check IC301 pin3: 5 V, pin4 3.3 V.
NO
NO
NO
Check JK300.
Check IC301 pin7, 8, 9 SDOUT.
Check IC301 pin13, 14
input waveform.