Question about Yamaha DSP-A1000 5-Channel Amplifier

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Auto Shut Off After 3 Seconds...?

Recently, I purchased a Yamaha DSP A1000 (older model, probably early 90s but one of the pioneers in surround sound) and it played fine when the person I bought it from played it for me. I got it home, hooked it up to my ipod and some Klipsch KG4 speakers, and it worked for about 10 min. before shutting off. Now, every time I try to turn on the amp/receiver it shuts off within about 3 seconds. Every attempt to change this has resulted in failure. I am sure this has something to do with the 6 ohm min amp being hooked up to the 4 ohm speakers, but find it strange as the guy I bought them from has owned them for about 15 years and never had a problem. Is there a way to disable this protection system or is it good that it is enabled? I'm hoping to avoid a repair shop as it can get costly quickly, and I already spent $300 on the amp, 2 KG4 speakers, and a Carver CT-7 Tuner.

It clicks and turns off after 3 seconds, even when no speakers are hooked up to it...

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  • dalip143 Jun 20, 2008

    My Yamaha is dead nothing when turned on there is no display only the relay clics input selection control turns litle and shuts off any sugestons please.

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Either your DSP output stage already damaged or maybe your speakers. have it both chekced for short. or worst both of them. DSP A1000 can drive as low a 4ohms on main channels but how is the power handling of your speakers? are you sure it has not exceeded the capacity of the speakers? or maybe you have over driven the speakers and they are still ok but your amp gut busted due to over drive. If the DSP amp is busted then it is due for replacement of power transistors and drivers. you can not disable the protection circuit. at least the design. it can be disabled by a tech person with a lot of modifications but i wont go for that or it can cause more damage to your equipments. i am from yamaha before and i have made conversions of protection circuits but it is too risky.

Posted on Aug 04, 2008

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