The output stage op-amp is failing and needs replacement.

Just bookmarking this thread with searchable subject, so I can find it more easily in the future!

(doing 2 of these repairs here today).

Cheers

Both tuners now working fine.

Cheers

My original tuner module failed recently. I was hoping for a loose wire in the harness, but after swapping players, sleds and it with a PCAT tuner, I've come to the realization that it is the tuner module.

It typically works for a minute or two before dropping to a extremely low (unlistenable) volume. Antenna signal strength remains fine even after the sound cuts out. Are these the symptoms of a bad RF module, or could it be the op-amp, or something else? In either case are parts still available for a repair?

It's probably that op-amp inside the RF module. The failure mode matches exactly what you describe.

I've never tried isolating it down to the specific component and replacing the component -- which would be the ideal repair. I have replaced RF modules with PCATS versions and some hackery, with a 75% success rate. But I don't do that any more.

Cheers

Oh, so the op-amp is a sub-component of the RF module. I was hoping it might be a separate and more common part. I'll contact Eutronix to see about the possibility of a repair. Thanks for your help Mark.

Hi Mark (Morrow). I got your message and would be happy to help, but your emails are bouncing and you don't accept private messages here. If you could turn on PMs or provide me an alternate we can take this offline.

Hadn't realized my PM receipt was set to off, but it is now on. I'll send you my work email too in case there is some issue with my personal one. I look forward to hearing from you.

My tuner module is having the same symptoms, somehow I missed this thread on the first go around. As a data point, the FM always works, and the AM drops out, usually after an hour of being on.

I've got a spare tuner, and a uncompleted (murdered by me personally) pcats kit. As soon as I open up my dashboard the parts of a working tuner will be up for grabs for the cost of postage.

It's usually a bad output stage op-amp, the tuner modules are bullet proof.