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6. Turntable-related
Defective rotation
Defective motor
controller IC
There is rotation, but no
sound.
Can sound be
heard in CD
mode?
Defective turntable
sensor part
7. Related to the audio output
AD signal output is not
possible.
Defective DAC IC
Analysis points:
1. There are three microcomputers.
The panel operates when UI is running.
When the LED of the PAD button flashes when "REALTIME REC" is pressed while the power is on, SC also is OK.
2. MD also is OK when updating from SD is possible.
3. SC/MD operation judgment and sensor judgment can be made by turntable/CD mode switching.
4. Confirm the power supply if the system is unstable.
5. Use test mode.
6. As the panels are connected in the order of CP1 --> CP5 --> CP3, confirm the preceding one.
7. For analog trouble, confirmation with a test CD (sine wave) is faster as the circuit is simple.
8. CD and SD have different connections to the MD microcomputer, but the signal flow after the input is in common.
Defective motor driver
No
Yes
Defective audio circuit
Defective operation
amplifier power supply
IC
No
Is the LCD TIME
display moving?
Yes
Defective MUTE circuit
Confirmation of the
MAIN control signal
Defect related to the
SC/MD microcomputer
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