LG RN7 - Page 51

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ELECTRICAL TROUBLESHOOTING GUIDE
7. DOUBLE USB FUNCTION
USB FUNCTION
Check USB jack
(CNT801, CNT802).
Replace IC501.
Check CN502.
Check IC501
(pin U7, U8/ A7, A8).
Display “NO FILE”.
Check USB_5V.
Display “READ”.
Plug-in USB device.
Display “NO USB”.
Check USB_D+, D-
(R5B69,R5B70,C5B11,C5B14,
ZD505,ZD506).
NO
NO
NO
NO
YES
YES
YES
YES
YES
YES
YES
Check USB audio file in USB device
(MP3, WMA file is playable)