Sony icf pro 80 - UK Vintage Radio Repair and Restoration Discussion Forum

eugen_b · 20th Dec 2021, 7:55 pm

Hi,
I repaired a Sony PRO 80, exchanged all electrolytic capacitors, except for the DC / DC converter.
The radio worked great on all tapes.
After a month I turned the radio back on and to my surprise
FM was OK but SW without volume, no reception, SQL everything dead!
The SQL Poti is repaired so it can't be.
After switching it on and off several times, everything is OK again .... Reception and SQL work !?
Do you have an idea what can that be !?
Thank you and best regards from Augsburg, Eugen

Goldieoldie · 20th Dec 2021, 9:53 pm

Hi
Check the traces and coils ( t11,t10) around ic2 .The leakage from the capacitors nearby can destroy them.If no fm then check l15.
Cheers
Pete

20th Dec 2021, 7:55 pm	#1
eugen_b Diode Join Date: Jun 2020 Location: Augsburg, Bavaria, Germany Posts: 9	Sony icf pro 80 Hi, I repaired a Sony PRO 80, exchanged all electrolytic capacitors, except for the DC / DC converter. The radio worked great on all tapes. After a month I turned the radio back on and to my surprise FM was OK but SW without volume, no reception, SQL everything dead! The SQL Poti is repaired so it can't be. After switching it on and off several times, everything is OK again .... Reception and SQL work !? Do you have an idea what can that be !? Thank you and best regards from Augsburg, Eugen

20th Dec 2021, 9:53 pm	#2
Goldieoldie Octode Join Date: Jul 2014 Location: Petersfield, Hampshire, UK. Posts: 1,043	Re: Sony icf pro 80 Hi Check the traces and coils ( t11,t10) around ic2 .The leakage from the capacitors nearby can destroy them.If no fm then check l15. Cheers Pete