Please ! Help with Technics SL-PS770A

[deuginthesky]

Hi there,


I can not find the mistake I did today while tweaking this reader.

I changed diodes for some BYV28-200 in order to connect some big (10 000µF 50V) power caps. I did not connect yet the big caps.
Also changed many resistors and took care to put the good values, and some other chemi caps (voltage and value respected).

I checked several times but can't find where I got wrong, the reader refuses to start and I even don't get the "standby" red light.

EDIT HERE: Also replaced LM833 by AD8599 (2), OPA2277U (1) and the 4560 by an AD8620.

Would somebody give me a hand with the schematics, or better some pics of the top of the PCB ?

I would really appreciate to get this reader working again, it sounds pretty well.


Thanks a lot.

 

[aparatusonitus]

Mail me, and you can have a service manual right now🙂

 

[deuginthesky]

email sent, thanks🙂

EDIT: thanks for this fast sending.

It's a bit too complicated for me, would you please help me if I send some pictures ? It would be very kind.

I will do it at the end of next week If you agree do give me a hand.


Thanks again,


Charles.

 

[aparatusonitus]

I'll take a look, but I can't promise anything...but you will get a extra helping hand(s) from diy community all right, dont sweet😎

 

[Unique]

Could you send me the service manual please?

 

[aparatusonitus]

Mail me, and I'll send it today/tomorow.

 

[Unique]

I am a new user here and i am not allowed to send mails yet. But i have no problem to tell you my e-mail, which is: uniquegr@hotmail.com

Thanks 🙂

 

[Unique]

Now that's what I call quick response!!! Thanks a lot my friend!! 🙂))