LG SH2 - Advanced Troubleshooting; Low Sound Output Solutions; Wireless and Bluetooth Troubleshooting

3-10
ELECTRICAL TROUBLESHOOTING GUIDE
2. SYSTEM PART
Power On
Check LED Board(LED)
LED on Function OK?
Check IC604 and SMPS.
Check IC601.
Check IC604 and SMPS.
Check IC501, IC101.
Replace X101.
Check IC501.
IC603 1.2 VA OK?
LED 3.3 V OK?
IC601 M3.3 VA OK?
IC501 function key in
& touch data OK?
X101 24 MHz OK?
IC501 LED CTL OK?
MAIN Board
TOUCH Board
TOUCH/MAIN Board
NO
NO
NO
NO
NO
NO
NO
YES
YES
YES
YES
YES
YES