6. Turntable-related
7. Related to the audio output
Analysis points:
1. There are three microcomputers.
The panel operates when UI is running.
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.
When the LED of the PAD button flashes when "REALTIME REC" is pressed while the power is on, SC also is OK.
8. CD and SD have different connections to the MD microcomputer, but the signal flow after the input is in common.
Defective rotation
Defective motor
controller IC
Defective motor driver
IC
Confirmation of the
MAIN control signal
There is rotation, but no
sound.
Defective turntable
sensor part
AD signal output is not
possible.
Defective DAC IC
Defective operation
amplifier power supply
Defective MUTE circuit
Can sound be
heard in CD
mode?
No
Yes
Defective audio circuit
Is the LCD TIME
display moving?
No
Yes
Defect related to the
SC/MD microcomputer
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