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Marantz SR870 tuner not working

I have a Marantz SR870 unit that everything works on except the radio tuner - FM hisses like the aerial is disconnected and AM is completely silent. No obvious signs of broken wires or bad soldering in the aerial connections. Any ideas? If all else fails, is it easy to connect a separate tuner?

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Hello,
Make sure your FM antena connection is good. A receiver will not pick up an FM signal without an antena. Even a small piece of wire will work to test. If the Tuner section is bad, an external tuner can always be connected to an Aux input. Due to cost, it may not be cost effective to repair this unit.
Hope this helps.

Posted on Oct 09, 2009

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Posted on Jan 02, 2017

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If you are interested in having your Marantz repaired, please visit my website at audioserviceclinic.com. You may contact me there. Thank you.

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It is always worth checking the aerial in any case of poor reception.

In the case of a standard mast-type aerial it is necessary for the mast to have very good continuity to the centre of the aerial plug, that the outer part of the aerial plug has good continuity to the aerial ground and thus to the vehicle bodywork and the two parts are electrically isolated from each other. A good independent radio ground connection also helps.

In the case of miniature aerials or those within a windscreen, a rear screen or rear quarter glass, the amount of signal available will be small and so an aerial preamplifier will be provided to boost the signal. The preamp might be part of the aerial or a separate unit fitted anywhere convenient. I once found one fixed to the front firewall behind the dashboard.
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Turn the volume up to the highest level.

Can you hear a hiss or static?

NO...usually means speakers are disconnected..often loose socket at rear of radio or broken wiring


YES...Hiss means either blown speaker, faulty radio or faulty aerial.

If you have tape or CD as well , this will prove whether it is the aerial or not.

HISS with CD or tape playing means faulty radio or speakers

WORKING OK with CD or tape means faulty aerial

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Is this what you need? http://cgi.ebay.com/4pc-Gold-Plated-Aerial-Female-Aerial-Female-Adapter-/180435080974?pt=LH_DefaultDomain_0&hash=item2a02c4d70e
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