Both in real live and according usual flow charts in the service manuals spindle motor starts just after 3-times up-down procedure of laser lens and follow sending FOK signal.
Now I have a device (model CDX 730E) on the desk with an issue mentioned in the head line (without TOC reading, of course - up-down procedure and laser light in this period of time is present).
This problem appeared suddenly.
This behavior is identical also without insert compact disc.
Such behavior I haven't observe until now. Changing of laser unit (KSS-150A/KSS-210A and even completely mechanism (SONY KSL-210AFM/KSL-2102AAM) don't provide any change - this means, both the disc motor (brushed version from Mabuchi) and the laser-unit are responsible for this behavior.
How should I start the trouble shooting procedure ?
Thanks for comments.
This threads don't provide the wanted information:
https://www.diyaudio.com/community/threads/yamaha-cdx-1100-spindle-motor-driver-problem.288084/
https://www.diyaudio.com/community/threads/problems-with-yamaha-cdx-1100.154872/
Now I have a device (model CDX 730E) on the desk with an issue mentioned in the head line (without TOC reading, of course - up-down procedure and laser light in this period of time is present).
This problem appeared suddenly.
This behavior is identical also without insert compact disc.
Such behavior I haven't observe until now. Changing of laser unit (KSS-150A/KSS-210A and even completely mechanism (SONY KSL-210AFM/KSL-2102AAM) don't provide any change - this means, both the disc motor (brushed version from Mabuchi) and the laser-unit are responsible for this behavior.
How should I start the trouble shooting procedure ?
Thanks for comments.
This threads don't provide the wanted information:
https://www.diyaudio.com/community/threads/yamaha-cdx-1100-spindle-motor-driver-problem.288084/
https://www.diyaudio.com/community/threads/problems-with-yamaha-cdx-1100.154872/
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I don't understand your reasoning.
if you changed motor and laser block and it still does not work, it is that the problem does not come from them right?
or i misunderstood
Yes, a wording error (thanks for this advice). The first sentence must read as follows:
Both in real live on an other device (same model) in correct working condition and according usual flow charts in the service manuals spindle motor starts just after 3-times up-down procedure of laser lens and follow sending FOK signal.
The faulty device behaves as mentioned in the header.
Bug fixed (but not exactly found) after resolder MCU's in QFP and dual inline outline so as around the servo drivers and cleaning PCB.
An exact investigation of the behavior revealed, that the lens down-up (for FOK), laser light sending and disc motor rotates starts at the same time.
Disc motor servo output provide 1V (first track) and 0,75V (last track).
In the event of an error, it was only 0.2V.
An exact investigation of the behavior revealed, that the lens down-up (for FOK), laser light sending and disc motor rotates starts at the same time.
Disc motor servo output provide 1V (first track) and 0,75V (last track).
In the event of an error, it was only 0.2V.
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