This is about FM stereo reception. When I adjust to a station it sounds great, and the stereo light is on. Then if I turn the power off, or switch functions, and go back to radio, or turn the power back on its no longer playing in stereo and the light is off. I have to turn the tuning knob, or toggle the Stereo/Mono switch to get back in stereo. These are strong radio stations here in my city. Even when the light is off I still have good reception only it sounds in mono, and not stereo. Anyone?
Thanks

the VCO oscillator pot probably needs a cleaning or recalibration to the proper frequency. Its right on the tuner board. You need the correct tools to do it right, but most can tweak it by a tiny bit either way to get it back in.

I'm pretty good with my hands, but don't know much about fixing stereos. If you can give me a little more details i can probably fix it. Details like, what kind of tools, where exactly is the VCO, and what it looks like, Etc.
Thanks.

you need to speak to stormin norman.....he`s a whizzard with stuff like this........

This happened to my M90 too.
There's a variable resistor on the tuner board which if adjusted slightly, will fix this problem, so if you're given good direction, it'll be do-able.
I'll now give-way to someone else who hopefully knows more specifics than me...

AHA!

found the old post:
http://stereo2go.com/eve/forum...491037225#6491037225

so, you're looking for VR1 on the tuner board.
Let me know if you need a service manual...

quote:

Originally posted by isolator42:
AHA!

found the old post:
http://stereo2go.com/eve/forum...491037225#6491037225

so, you're looking for VR1 on the tuner board.
Let me know if you need a service manual...

Nice catch Isolator.......

Here you go.



Frequency counter method is much better, especially for weak stations. But the simple method should get you close enough to make you happy.

Thanks, everyone! You guys sure know your stuff.
Hope I also can learn some more tricks in the future, so I can pass them on to future Boombox lovers everywhere.

YOU GUYS ROCK!!!

I love this thread! Its what brought us all together in the first place

Got yr PM about the service manual, Daniel.
I'm gonna need an email address to send it to you - sent it to me via PM, cheers.