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ELECTRICAL TROUBLESHOOTING GUIDE
9. DOUBLE USB FUNCTION
USB FUNCTION
Check USB jack
(CN801, CN802).
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-
(R573, R574, C573, C574
D501, D502).
NO
NO
NO
NO
YES
YES
YES
YES
YES
YES
YES
Check USB audio file in USB device
(MP3, WMA file is playable)
Summary of Contents for OM7560
Page 13: ...1 12 ...
Page 19: ...2 8 ...
Page 53: ...3 34 2 SDRAM IC502 Fig 2 SDRAM 7 6 8 5 8 6 7 5 ...
Page 66: ...3 77 3 78 2 MAIN P C BOARD TOP VIEW ...
Page 67: ...3 79 3 80 MAIN P C BOARD BOTTOM VIEW ...
Page 68: ...3 81 3 82 3 TOP FRONT P C BOARD TOP VIEW ...