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Old 28th March 2016, 08:12 AM   #1
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Default BGW 7000B

Hi all, I have one, and the power lights blinks on and off and there is no sound. It was never used much and looks like new, Any idea whats gone wrong? Thanks.
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Old 28th March 2016, 09:04 AM   #2
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Sure thats easy. It's broken.
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Old 28th March 2016, 11:49 AM   #3
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I would start at the power supply and then check there is no DC on the speaker outputs, amplifier end, not after the protection relay..
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Old 28th March 2016, 05:19 PM   #4
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Originally Posted by JonSnell Electronic View Post
I would start at the power supply and then check there is no DC on the speaker outputs, amplifier end, not after the protection relay..
Thanks for a intelligent reply.
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Old 28th March 2016, 05:44 PM   #5
anatech is offline anatech  Canada
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Hi tubes1988,
How familiar are you with solid state servicing? What equipment do you have available to you?

Look for open fuses first. If you find any, check to see if its a little puff, or if the glass is silvered or blackened. Also, give the chassis a sniff to see if there is a burned smell. Have a look around in the chassis after that with a bright light for obvious problems. Once you are done those things you can start checking for DC offset right on the amplifier PCBs, before the relays.

If you find a fuse that has been blown by high energy (more than a little patch of silver on the glass, do not replace the fuse! If you do see just a little "puff"of silver, go ahead and replace the fuse and spark it up. Keep your ears ready to listen for any unusual noises from the amplifier chassis. If you start to hear a hiss sound, ... DUCK!

-Chris
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Old 28th March 2016, 05:57 PM   #6
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Thanks to you all for your time, I will just send it to my repair guy.
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Old 28th March 2016, 11:01 PM   #7
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BGW 7000 / 7000B ProLine

I designed the BGW 7000's and many others during my 8 +year's @ BGW.
The BGW 7000 & 7000B are almost the same. The 7000 has no output limiting and the 7000B has vi limiter (Stops the power transformer from failing during customer abuse). The chassis was slightly changed and the tx shield was installed.

Yes, no output relay. The circuit is all descret an NO ON or OFF POPS. The ProLine was to be cost effective and no frills.

I don't have the manual as I have lost several in my moves. The amplifier has a thermal circuit breaker. If you have the manual it has the schematic. If you have it send me a copy and I will help you.
Duke duke.aguiar@ieee.org
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Old 29th March 2016, 01:47 AM   #8
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Quote:
Originally Posted by tubes1988 View Post
Hi all, I have one, and the power lights blinks on and off and there is no sound. It was never used much and looks like new, Any idea whats gone wrong? Thanks.
Such an informative question.

Quote:
Originally Posted by tubes1988 View Post
Thanks for a intelligent reply.
Thanks for asking an intelligent question to start with.

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Thanks to you all for your time, I will just send it to my repair guy.
What a suprise.
But a good idea.
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Old 29th March 2016, 06:32 AM   #9
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Originally Posted by Audio1Man View Post
BGW 7000 / 7000B ProLine

I designed the BGW 7000's and many others during my 8 +year's @ BGW.
The BGW 7000 & 7000B are almost the same. The 7000 has no output limiting and the 7000B has vi limiter (Stops the power transformer from failing during customer abuse). The chassis was slightly changed and the tx shield was installed.

Yes, no output relay. The circuit is all descret an NO ON or OFF POPS. The ProLine was to be cost effective and no frills.

I don't have the manual as I have lost several in my moves. The amplifier has a thermal circuit breaker. If you have the manual it has the schematic. If you have it send me a copy and I will help you.
Duke duke.aguiar@ieee.org
Thaanks!
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