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Old 8th June 2008, 05:51 PM   #1
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Join Date: Jul 2004
Location: Sweden
Question EAD Power Master 1000, Blown fuse ???

Hi
I have a EAD Power master 1000, 5-chanel power amplifier which blow the external fuse at startup.
I tryed to disconnect cable for cabel yo see which part of the ampifier where shorted.
But afer disconecting the power from the diodebridge output (+ and -) I manage to start the amplifier without blowing the fuse.
However after some futher on/off switching even this blowed the fuse
The EAD Power master 1000 has a start-up board sins it has a touch switch for start up.
Does this board also include a soft start circuit which could be fault ?
Does anyone have any sugestions how to progress ?
The fuse rating is 3,15 A/250V and I have not tested a higher rating. Should I ?
BR
Pix
Sweden
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Old 8th June 2008, 07:00 PM   #2
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Default Re: EAD Power Master 1000, Blown fuse ???

Quote:
Originally posted by pixworld
Hi
I have a EAD Power master 1000, 5-chanel power amplifier which blow the external fuse at startup.
I tryed to disconnect cable for cabel yo see which part of the ampifier where shorted.
But afer disconecting the power from the diodebridge output (+ and -) I manage to start the amplifier without blowing the fuse.
However after some futher on/off switching even this blowed the fuse
The EAD Power master 1000 has a start-up board sins it has a touch switch for start up.
Does this board also include a soft start circuit which could be fault ?
Does anyone have any sugestions how to progress ?
The fuse rating is 3,15 A/250V and I have not tested a higher rating. Should I ?
BR
Pix
Sweden
If the main fuse is blowing then something serious has blown.

1/ Output transistors.
2/ PSU capacitors gone short.
3/ Bridge gone short circuit.
4/ Transformer died.
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