CD-C471
the CD tray fails to open
Is there following voltage input in specific state of
pin
Open state: OV
Close state: OV
Check the OPEN CLOSE SW and the wiring from the
No
pin 53 to the OPEN CLOSE SW.
Intermediate state between open state and close state:
I
Yes
Is output to
pin 24
CLOSE key is
is defective. Replace it.
Check the wiring of the
pins 24 and 25,
pins 1 and 3.
I
Is output between
pins 3 and 7 during operation
stated above?
No
Check the periphery of
OK
Yes
Check the loading motor (M3) and the loading mechanism.
The CD
kevs don’t work.
Yes
Check the CD,
power supply, and 16.93 MHz clock, and
reset terminal.
See if the pick-up is in the PICKUP IN SW position.
Yes
If the items mentioned above are OK, check the main
microcomputer
Check the Focus HF system.
Playback can be performed without a disc.
0.50
FD
0.50
Figure 41
Does the pick-up move
No
Focus search OK
Does the output waveform
Fig.
Check the area around
I
Check the microcomputer data on pins
Summary of Contents for CD-C471 W
Page 16: ... I I Ill I i c r __ __ I Figure 16 BLOCK DIAGRAM 2 3 16 ...
Page 17: ...CD C471 W w UTER lC56115621563 N5M4558L lC562 1 2 Figure 17 BLOCK DIAGRAM 3 3 17 ...
Page 36: ... POWER PWB B 1 MAII IUPWB P33 7 A 1 2 3 4 5 6 Figure 36 WIRING SIDE OF P W BOARD 6 8 36 ...
Page 54: ...CD C471 W MEMO 54 ...
Page 70: ......
Page 71: ...CD C471 W MEMO ...
