NAD C660 Service Manual page 25

Writing Part Check.
Refer "Laser is abnormal".
Load tray with CD-R/RW Disc.
Does the unit
goes to stand-by mode when
recording?
YES
Does Writing finish
without any error?
YES
Is the written file
read nomally?
YES
YES
Check the connection of IC301
pin 187 and replace IC301.
OK
• Check the communication Iines
between IC320 and IC301.
• Check and replace the IC302 or
IC301.
NO
NO
Go to "ALPC Logic Circuit Check".
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Start Recording or dubbing.
NO
Eject Tray.
Is the re-written file
read nomally?
NO
Is
ROPCSH input signal
Pulse when CD-R writing
(IC108 pin 43)
YES
Go to "BETA Measurement
Circuit Check".