Table of Contents
Advertisement
• When turntable fails to move.
Is there following voltage input on the IC701 pin 41 in the
specific state?
When the CD mechanism is moved up: 0V
In other states: 4.3V
Yes
Is L output from the IC2 pin 27 during SEC when the disc skip
switch is pressed?
Yes
Is 4V output from the Q51 emitter during operation stated
above?
Yes
Check turntable motor and turntable mechanism.
• When the CD tray fails to open or close.
Is there following voltage input in specific state of IC701 pin 39?
Open state: 0V
Close state: 0V
Intermediate state between open state and close state: 4.3V
Yes
Is H output to IC2 pin 24 or 25 for 7 seconds when the OPEN/
CLOSE button is pressed? IC3 is defective. Replace it.
Yes
Is 4V output between IC3 pins 38 and 39 during operation
stated above?
Yes
Check the loading motor (M3) and the loading mechanism.
• The CD function will not work.
The CD operating buttons don't work.
Yes
Check the CD, DSP, power supply, and 16.93 MHz clock, and
reset terminal.
Yes
Check the waveform of SCK, SO (DATA) and SI (COMM).
Yes
See if the pick-up is in the PICKUP IN switch position.
Yes
If the items mentioned above are OK, check the main
microcomputer IC701.
All manuals and user guides at all-guides.com
No
No
No
No
No
No
– 33 –
Check the MECHA UP switch and the wiring from the IC701
pin 41 to the MECHA UP switch.
Check the wiring of IC2 pin 27 and Q51 pin 2.
IC2 defective.
Check Q51 and the periphery.
Check the OPEN/CLOSE switch and the wiring from the
IC701 pin 39 to the OPEN/CLOSE switch.
Check the wiring of the IC2 pins 24 and 25, IC3 pins 38 and 39.
OK
IC2 defective.
Check the periphery of IC3.
OK
IC3 defective.
CD-C605H
OK
Advertisement
Table of Contents
