Pioneer Tuner F-Z93L troubleshooting

Jul 09, 2005 2 Replies
G

Hi everybody



I have a pretty old Pioneer Tuner F-Z93L part of an entire stereo device S111. The problem with the tuner is that it keeps searching on the entire FM-band in order to find a station. It never stops. I think it has something to do with the treshold level to distinguish noise / signal.



In it, I descovered a PCB with number ANPI356-B. There's another PCB near the front, carrying the LCD and some other stuff.



Has anyone advice upon this, similar problems in another tuner, a schematic diagram would be perfect :-)



Thanks for help



Eng. GDB



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M

If you can manually tune a station, and it's just that the scan-stop doesn't work, the discriminator needs adjustment. This is actually quite common on digital tuners. This normally requires a service manual to locate the test point and the adjustment coil(transformer, actually), and a voltmeter (or the 'scope on a small DC range) to adjust for minimum DC at the test point, when tuned to a station near 98mHz. Also, the VCO may need adjustment if the stereo beacon lamp or LED does not come on reliably.

Mark Z.

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C

Hello

I've got a F-Z92L tuner, which may be compatible with your system (connected via a short ribbon cable and connector). Yours for the price of UK postage or collect from Devon. Being quite light I would expect it to cost £7.20 to post.

Contact me directly on snipped-for-privacy@bigfoot.com if this is of use to you.

Regards,

Colin

snipped-for-privacy@user1.be wrote:

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