Hello friends,
very interesting case.Marantz cd73 reads disk ant play .After 2-3min the disc starts to spin slower and stops for a while.If player cold ,play longer about 1-2 tracks.playing longer stays off the power.without switching off the power, after restarting, restarts, plays for about 20-30 sec.I have no any ideas.Power supplays voltages are ok.HF signal are ok.I tink problem is in decoder board (this player has sony chips),but I can't find the fault.the oscilloscope shows a distorted signal before stopping.Maybe you have any ideas?Thank you.
very interesting case.Marantz cd73 reads disk ant play .After 2-3min the disc starts to spin slower and stops for a while.If player cold ,play longer about 1-2 tracks.playing longer stays off the power.without switching off the power, after restarting, restarts, plays for about 20-30 sec.I have no any ideas.Power supplays voltages are ok.HF signal are ok.I tink problem is in decoder board (this player has sony chips),but I can't find the fault.the oscilloscope shows a distorted signal before stopping.Maybe you have any ideas?Thank you.
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I would be trying some freezer spray on this based on how you describe the fault as being affected by temperature. Use very sparingly and drip it onto suspect parts, do not blast large areas.
You need to check ALL rails which I take it you have done.
If the disc slows down and stops then the HF signal (which is what we commonly call the HF, RF or eye pattern) can not be OK because the HF signal is coming directly from the disc.
Cheap butane based air dusters will work as freezer if you invert the can.
You need to check ALL rails which I take it you have done.
If the disc slows down and stops then the HF signal (which is what we commonly call the HF, RF or eye pattern) can not be OK because the HF signal is coming directly from the disc.
Cheap butane based air dusters will work as freezer if you invert the can.
Thank you .cdx 7934 is warm.I have other sub board with it,but it not work.cdx7934 is warm too.I made full Laser preamp pcb resoldering.I have to check it🙂
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