Question about Sansui RZ-8150AV Receiver

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Volume Knob (Sansui RZ9400)

I have a RZ9400, the problem is that i can't turn a volume up using the Volume knob, I can only turn it down. only a remote control is able to do this. The remote control can turn up or down the volume. can anyone tell me if this is normal? i've trying to track-down for people who have this type of receiver, but it seems like no one have it!

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2 Suggested Answers

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SOURCE: I have a sansui G9700 receiver/amp. The volume

The potentiometer doesn't need to be replace, it has collected dust inside causing the intermittent operation. Buy a contact cleaner/conditioner to spray inside it and move the potentiometer clockwise and counter clockwise a few times until the dust inside it is gone.
Check this link to find a contact/conditioner cleaner or you can try spraying rubbing alcohol but this could because alcohol doesn't not lubricants properties.
Let me know if you require further assistance.

Posted on Nov 27, 2010

  • 8546 Answers

SOURCE: I have a Sansui 717

Generally speaking, an amp protects itself from heat, shorts and overloads.

Overloads can be from excessive periods of high output and shorts would be wiring issues or a speaker blowing up.

You should be able to feel if it's hot. WHY is it overheating? Make sure it has sufficient ventilation on all sides and that vent holes are not blocked by dust balls. Ensure the fan (if equipped) is running as designed (some only operate on demand). Clean dust and debris from it.

If the amp comes back on after cooling, you're lucky. They only have so many self-protection cycles in their lives so continuously resetting or cycling their power without addressing the cause can do more harm than good.

If it protects immediately on a cool power up you should disconnect the speaker connections and try it 'naked'. If it comes up then diagnose which lead(s) are shorted. If it does not come up the problem is internal and should be left to an experienced hands-on tech.

Posted on Jan 23, 2011

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