Denon DCD-510AE Service Manual page 19

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FLOW CHART NO.7
No operation is possible from the remote control unit.
Is 5V voltage supplied to Pin(3) terminal of the infrared
remote control receiver (RC41)?
Is the "L" pulse sent out Pin(1) terminal of receiver
(RC41) when the infrared remote control is activated?
Is the "L" pulse supplied to the Pin(35) of IC21?
Replace IC21.
FLOW CHART NO.8
The disc tray cannot be opened and closed. (It can be done usin
Is the normal control voltage inputted to Pin(86) of IC21?
Refer to "FLOW CHART NO.6" <The key operation is not
functioning.>
Refer to "FLOW CHART NO.9" <The disc tray cannot be
opened and closed.>
FLOW CHART NO.9
The disc tray cannot be opened and closed.
Check the line between CN52 and IC21, and service it if
defective.
FLOW CHART NO.10
Audio is not outputted normally.
Set the disc on the disc tray, and playback.
Are the analog audio signals outputted to each pin(7) of
IC72 or IC82
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IC72 7PIN : AUDIO (L)
IC73 7PIN : AUDIO (R)
Is the "H" level MUTE line to Pin(8) of CX61?
Check POWER MUTE line and F_MUTE line service it if
defective.
IC21 69PIN MUTE H : mute / L : play
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No Check +5VDD line and service it if defective.
Replace the infrared remote control receiver (RC41) or
No
replace the remote control unit.
No Check the li ne between Pin(1) terminal of receiver
(RC41) and Pin(35) of IC21, and service it if defective.
g the remote control unit.)
No Replace the "OPEN" button (SW47).
Check AUDIO+V(+12V) and AUDIO-V(-12V) line and
No
service it if defective.
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Check the DAC(IC75) digital audio data signal of a DSP
(IC31). (SCK, BCK, LRCK, DATA)
Check the DAC(IC75) control signal of a microcomputer
(IC21). (MS, MC, MDI))
Check DAC_Vcc(+5V) line and service it if defective.
Replace IC75.
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