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MA 5002VZ fault


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#1 StephenHoy

StephenHoy
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Posted 20 May 2005 - 06:59 AM

huh.gif

The amp seems to work well at 8 ohms but at 4 or 2 ohms the IOC flashes at output voltage 45V at 4 or 2 ohm.The IOC only flashes and as you increase the output past the 45v piont , after that it only flashes agian at max output. The channel also seems a bit down on power at 2 ohm.

Checks made so far:
No output dry joints
Amp works fine in lock high mode. huh.gif
Checked VZ switch circuit seems OK but distortion in square wave output on Mosfets in swtch 555 timer OK all cables OK.
Tried another cap switch assembly no change
Tried another output assemble no change
Tried another Main assemble no change

Bit of a strange one please help

Stephen
South Africa