Bram Jacobse

Tinkering CD Players & Digital Audio

CD 16 Won’t read disc

by · Published · Updated

When it reads CD’s it play flawless and audio is present  on the digital output ,  Analog won’t work ;-(

 

 

 

Lets check if the SM5803 is working

Okay what is this…?! why..?!

 

DOL Data Left channel when in stop , look okay

BCKO , the bit clock, okay

Play a CD , data on DOL & DOR

I see some strandes orange dots on safety resistors  , the are burned

 

7 in total all in the + & – 5 volt

Replaced the resisitos and now  we have a working right Channel.., left is still dead…;-( , aha Left channel TDA1547 has vREF of -0.5 instead of 4.7volt…the 560 ohm ressitor is fine ..