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

 

[rjenkinsgb]

There is a manual here for the 200 series, if that helps?

SANYO MCD-ZX200F SERVICE MANUAL Pdf Download

View and Download Sanyo MCD-ZX200F service manual online. CD Portable Radio Cassette Recorder. MCD-ZX200F cassette player pdf manual download. Also for: Mcd-zx200xe.

www.manualslib.com

I was also going to suggest the same a Doug - it's a common problem with old audio gear, just tarnished switches.

 

[carolmaille]

Hello there's no audio record on.this device - there's a CD Radio and cassette deck - no display or control on.the CD player-
I can hear something à blip.when I switch from.CD/Cassette to radio but no radio sound
The casette mechanism.works but only hum output
So I guess I can at first clean the switches with isopropyl alcohol.- and buy some cleaning spray
Also buy some batteries as it's easier/safer to work on. Thank you

 

[Nigel Goodwin]

Hello there's no audio record on.this device - there's a CD Radio and cassette deck -

Of course there is, it's clearly called a 'cassette RECORDER', and the service manual (freely available to download) clearly shows the record/play switch, and the bias oscillator etc.

 

[carolmaille]

So there IS ! Id completely forgotten that with cassette recorders you 'usually' ? could record and this is no exception. Oh good I can try that - that would be a good fix, not having to desolder things. Thanks

 

[Nigel Goodwin]

So there IS ! Id completely forgotten that with cassette recorders you 'usually' ? could record and this is no exception. Oh good I can try that - that would be a good fix, not having to desolder things. Thanks

The record/play switches usually switch the heads from record to play, so you're talking a high level of signal (record) and a very small level of signal (playback). Even a slight resistance in the record play switch will make it oscillate - it was a common fault back when I was repairing such things.

A small squirt of WD40 or similar in the switch, and working it back and forwards a few times, usually cures it. We used WD40 for decades at work, as it worked better than any 'switch cleaner' products.

 

[ChrisP58]

On a side note, I would suggest copying the contents of the cassette tapes to another storage medium.