Denon DCD-F109 - Flow Chart No. 8: USB Play Issues; Trouble Shooting Flowcharts (Final); Flow Chart No. 9: CD Play Issues

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USB PLAY don't work normally.
Check Data Signal from USB UNIT.
JACK500 2,3pin +D,-D
Is VBUS(+5V) voltage supplied to Pin(1) of JACK500?
Check the voltage of +3.3V is supplied to Pin(3) of IC21.
Check the voltage of +3.3V is supplied to Pin(4) of IC21.
Check the voltage of +5V_D is supplied to Pin(6) of IC21.
Check the voltage of +5.0V is supplied to Pin(3) of IC605.
Check IC15 and the periphery circuit, and service it if
defective.
NO
NO
YES
FLOW CHART NO.8
FLOW CHART NO.9
Is +7V_DRV voltage supplied to Pin(21),(22) of IC14?
Is +3.3V_D voltage supplied to Pin(3) of IC20?
Is the "H" level CD Reset to Pin(69) of IC17?
CD PLAY don't work normally.
Is the "H" level CD Reset to Pin(1) of IC15?
Check CD Control wave and service it if defective.
RFEQO,RFO,FSMONIT,FOO,TEI,TRO,FMO,DMO of IC17.
Check if there is any leak or short-circuiting rectier
circuit of Power transformer, and service it if defective.
(Main Trans,IC610,D617,D618,D622,D623)
Check IC609,D615,D616 and the periphery circuit, and
service it if defective.
NO
NO
NO
Check IC11,IC15 and the periphery circuit, and service it
if defective.
Pin(57) RST1,Pin(26) USB_RST of IC11OK?
Pin(68) RST2 of IC15 OK?
NO
YES
YES
YES
YES