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I am desperately in need of a schematic for a ZX450
Posted: Sun Sep 27, 2009 5:25 pm
by gfunk_nz
As per title, the 450 that I will be running my Havocs off has one channel distorting to buggery, I took it in for repair and they are battling to track down the problem. They have asked if I can find a schematic so they can troubleshoot it a lot faster.
Can anyone help me out?
Posted: Sun Sep 27, 2009 5:29 pm
by Eric D
Does the amp draw excessive current, or is it just distorting badly on the one channel?
Posted: Sun Sep 27, 2009 6:02 pm
by gfunk_nz
just purely distorting on one channel and it's only under load, without load it's normal
Posted: Mon Sep 28, 2009 6:27 am
by Eric D
What are you using for a load? Is it at high volume or low volume?
Posted: Mon Sep 28, 2009 10:54 am
by gfunk_nz
I was just using a speaker I'm not sure what the repairer is using. It was doing it at all levels.
Posted: Mon Sep 28, 2009 1:18 pm
by Eric D
There are some low value resistors which drive the main output transistors. I think they are 2.2ohm. They are designed to blow like a fuse if the output transistor is shorted. One of these may have blown which will result in a very distorted output.