Unitra Fonica Mr Hit Gramofon ze wzmacniaczem Typ WG-400

Hi, I hope I am not mistaken the place of issue, but if so, please excuse me .. I UNITRA FONICA Mr Hit GRAMOFON ZE WZMACNIACZEM TYP WG -400. Very little is heard, barely audible. Want to fix it and that I need the scheme. Please if someone can help me.
Thank you

Hi!
Here you have a diagramm: http://www.oldradio.pl/foto_schematy/sch00268.jpg .
Good luck!

Thank you very much!