Sanyo MCDZX220m cassette desk no sound

[carolmaille]

Hello
Please can anyone help and give me some ideas?
Sanyo MCDZX220m cassette desk no sound except a buzz/drone but the mechanism works. I tried to trace the route of the sound and see some kind of wave seems to be on the chip TC4052B - a multiplexer - when cassette is selected - this is on the board with the output to the speaker. The speaker has a low resistance so I don't suppose it is faulty.
There is a TA8227 I dont know what this does and cant see a data sheet about it. Thank you
The LCD ? display for the CD player is blank and the CD controls dont work and no radio output either
It is for an elderly lady who wants to listen to her cassettes.

 

[Doug]

I dont know the unit.
If it has a record playback switch I would put it in record mode with a record able tape and push the record button back and forth..the contacts usually need clean.
After just putting it in record about 10 times Recheck the unit