Double Usb Function - LG CM5660 Service Manual

ELECTRICAL TROUBLESHOOTING GUIDE

9. DOUBLE USB FUNCTION

USB FUNCTION
YES
Plug-in USB device.
YES
Display "NO USB".
YES
Display "READ".
YES
Display "NO FILE".
YES
Check USB audio file in USB device
(MP3, WMA file is playable)
NO
Check USB_5V.
Check
USB_D+, D- (R565, R567,
D503, D504).
Check IC500
(pin U7, U8/ A7, A8).
3-32
NO
YES
NO
YES
NO
Check JK500, JK501 pin1.
Check USB jack
(JK500, JK501).
Replace IC500.