Hi,
I have an Aiwa DX-666 which will not read CDs. The spindle spins up for about 10 secs then stops, and 99 appears on the display. Everytime I hit 'play' the same thing occurs. The RAFOC unit is a CDM-4/14. With no CD in the drive one can see that the radial arm moves to the innermost position and the lens moves up and down a few times. I have measured the laser current which is 50 - 55 mA, and the eye pattern is about 2 V pk to pk on a scope however this is not a clean pattern (more like a bird's nest) as the spindle stops turning after about 10 secs which is not enough time to adjust the scope trigger etc. I have re-capped all the electrolytics on the servo - preamplifier board except the bipolar one.
I have a Service manual but it is for a CDM-2 so I am not sure if the test procedures and given measurements would apply to the CDM-4. The manual mentions various 'service positions' and how to select these but not service position1; I have not attempted to set these yet. I would be very grateful if anyone could offer any advice. I am not familiar with repairing CD players and to be honest am feeling a bit lost so any help would be great.
Could I also ask if anyone knows where I can download a service manual for the CDM-4.
Many thanks.
I have an Aiwa DX-666 which will not read CDs. The spindle spins up for about 10 secs then stops, and 99 appears on the display. Everytime I hit 'play' the same thing occurs. The RAFOC unit is a CDM-4/14. With no CD in the drive one can see that the radial arm moves to the innermost position and the lens moves up and down a few times. I have measured the laser current which is 50 - 55 mA, and the eye pattern is about 2 V pk to pk on a scope however this is not a clean pattern (more like a bird's nest) as the spindle stops turning after about 10 secs which is not enough time to adjust the scope trigger etc. I have re-capped all the electrolytics on the servo - preamplifier board except the bipolar one.
I have a Service manual but it is for a CDM-2 so I am not sure if the test procedures and given measurements would apply to the CDM-4. The manual mentions various 'service positions' and how to select these but not service position1; I have not attempted to set these yet. I would be very grateful if anyone could offer any advice. I am not familiar with repairing CD players and to be honest am feeling a bit lost so any help would be great.
Could I also ask if anyone knows where I can download a service manual for the CDM-4.
Many thanks.
I see essentially a rebadged philips cd player and most likely a cdm2 and not a cdm4.
here are the SM of the aiwa and cdm4
here are the SM of the aiwa and cdm4
Thanks for taking the time to forward the cdm2 manual. It's the same as the one that I have but the diagrams and text are clearer. Perhaps you would have a link to where I might download the cdm4 SM or know which Philips CD player used the cdm4 so I can search online?
Thanks.
Thanks.