19
DCD-510AE
FLOW CHART NO.7
No operation is possible from the remote control unit.
㸣
Is 5V voltage supplied to Pin(3) terminal of the infrared
remote control receiver (RC41)?
㸢
No Check +5VDD line and service it if defective.
㸣
Yes
Is the "L" pulse sent out Pin(1) terminal of receiver
(RC41) when the infrared remote control is activated?
㸢
No
Replace the infrared remote control receiver (RC41) or
replace the remote control unit.
㸣
Yes
Is the "L" pulse supplied to the Pin(35) of IC21?
㸢
No Check the li ne between Pin(1) terminal of receiver
㸣
Yes
(RC41) and Pin(35) of IC21, and service it if defective.
Replace IC21.
FLOW CHART NO.8
The disc tray cannot be opened and closed. (It can be done usin
g the remote control unit.)
㸣
Is the normal control voltage inputted to Pin(86) of IC21?
Refer to "FLOW CHART NO.6" <The key operation is not
functioning.>
㸢
No Replace the "OPEN" button (SW47).
㸣
Yes
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.
㸣
Check the line between CN52 and IC21, and service it if
defective.
FLOW CHART NO.10
Audio is not outputted normally.
㸣
Set the disc on the disc tray, and playback.
㸣
Are the analog audio signals outputted to each pin(7) of
IC72 or IC82
㸢
No
Check AUDIO+V(+12V) and AUDIO-V(-12V) line and
service it if defective.
㸣
Yes
IC72 7PIN : AUDIO (L)
IC73 7PIN : AUDIO (R)
Check the DAC(IC75) digital audio data signal of a DSP
(IC31). (SCK, BCK, LRCK, DATA)
㸣
Yes
㸣
Yes
Is the "H" level MUTE line to Pin(8) of CX61?
Check the DAC(IC75) control signal of a microcomputer
(IC21). (MS, MC, MDI))
㸣
Yes
㸣
Yes
Check POWER MUTE line and F_MUTE line service it if
defective.
Check D5V) line and service it if defective.
IC21 69PIN MUTE
H : mute / L : play
㸣
Yes
Replace IC75.
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