CD 304 Trouble Reading CD

This CD 304 has difficulty reading and playing Disc’s

The Eye-Pattern looks nasty

 

maintenance on CDM-1

Eringa High-end output modification

I can’t find the problem in the  CDM-1 , i think its a laser or  photodetector or optical problem. So i replaced the CDM-1 and now the player is working fine. removed the Eringa Modification

 

 

Oeps “Stocko” trouble

New Display glass

 

 

“Serious deterioration of the eye pattern is observed when aberrations are present that elongate the scanning spot in the track direction and thus increases the isI. In figure 2.39(b) the information track is read with an astigmatic light spot whose focal line parallel to the track is in focus on the disc (the astigmatic coefficient Wz2 is 0.35). The eye pattern is rather disturbed now and the experiment shows that an unacceptable bit error rate is detected.”

Link : CDM-1 CDA preamp Equaliser – Mart Bierhoff

Added some chassis cinch and reconnected the line level control