LG CJ44 - Double Usb Function

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ELECTRICAL TROUBLESHOOTING GUIDE
10. DOUBLE USB FUNCTION
USB FUNCTION
Check USB jack
(JK301/ JK302).
Replace IC500.
Check CON301.
Check IC500
(Pin U7, U8/ A7, A8).
Display “NO FILE”.
Check USB_5 V.
Display “READ”.
Plug-in USB device.
Display “NO USB”.
Check USB_D-/D+
(R383, 384).
NO
NO
NO
NO
YES
YES
YES
YES
YES
YES
YES
Check USB audio file in USB device
(MP3, WMA file is playable)