Fisher Futura 202 pops when turned on

[umblueice]

I picked up a Fisher Futura 202 Receiver at a GS and when I turn it on I get a pop from the speakers. I've cleaned all the pots and switches and will be doing a recap but is there anything else I should be looking at to eliminate the pop.

Thanks

 

[ferninando]

sounds like you got DC on the outputs. try checking dc offset spec. thats the dc across the spkr trmnls at zero vol no input on aux. should be <=20mv, idealy zero.
your rcvr may have diff. spec.

 

[ryuuoh]

You could switch off the speakers when you turn it on. If the unit doesn't have a protection relay, it's going to pop.

 

[Brian]

Another possibility is if there is a cap across the power switch. If bad, then you will hear a pop.

 

[umblueice]

sounds like you got DC on the outputs. try checking dc offset spec. thats the dc across the spkr trmnls at zero vol no input on aux. should be <=20mv, idealy zero.
your rcvr may have diff. spec.

When I powered it on both terminals had 13 volts on them and then gradually dropped down to .2 volts. Any suggestions? Also looking for the service manual.

Thanks