Sphinx Project 9 cd motor not running after laser change

[muizel]

Guido,


You are right, found SAA7310GP below the mainboard and will replace this chip.

And hopes this is the dault.

Rene.

 

[muizel]

This afternoon I have replaced the SAA7310 and have perfect pulses on the mcs pin. But the cd motor is still not running, the signal goes through an opamp and then to a TCA0372DP2 chip from that point through a connector to the circuitboard below the cdm1 mk2 drive and the to the hall motor pcb. Somewhere in tis circuit the pulses ar lost.

I also managed to get in some sort of serviceposition and saw an error ER02 wich means no TL puls during startup. In this service position I can let the focus lens go up and down and shut down the pulses from the SAA7310 but I can not let the laserarm move only the above works in this service menu. ?

Any help suggestions Please

Regards Rene.

 

[stephensank]

I recognise the pcb that sits under the CDM as exactly the same as one of the two versions of the Bang & Olufsen Beocenter 9000 from the mid-late '80's. Perhaps you can find a schematic/service manual online somewhere or from B&O.

 

[kevinkr]

Could this be a unit from Daisy Laser? (They provided mechanisms to a lot of the smaller OEMs.) Unfortunately even if that is the case Daisy is less than helpful with these older units, just like Philips itself.

 

[guido]

Nope, standard philips. As used in CD80 etc.

 

[muizel]

Thanks everyone for helping the Sphinx is working I overlooked a defect smd resistor in the circuitboard of the hallmotor.


Thanks René.🙂

 

[kevinkr]

Delighted to hear this story has a happy ending! 😀 😀