Zapco Z400c4-SL no power supply

[fongman]

I will try it later. Thank you Perry for your help.

 

[fongman]

I try calling zapco today and they don't sale parts. They charge $65 to look at it. I'm going to try to hook up the transformer tonight.

 

[fongman]

Ok the picture on the left is scott-leanne's zapco amp. Mine is the one on the right. I can't figure what wires goes where? Don't the transformer reduce power? Will this put to much power to the board?

 

[Perry Babin]

Did you read the text in post #13?

 

[fongman]

How do i know which are the:

outer primary windings
center secondary wires
center primary windings
outer secondary windings

on the Zapco amp. Can you point out wires on the pictures?

 

[fongman]

On the zapco amp P1,2,5,6,7,8 are ground. And P3,4 are 12V. Where should the winding of the transformer go? Sorry i'm just lost. I can hook them up but i don't want to burn anything up.

 

[fongman]

I'm not sure if this is were they so go?

 

[Perry Babin]

You have too many wires going to ground. Re-check with your ohm meter to see which ones are directly (~0 ohms) to the ground terminal of the amp.

 

[fongman]

P6 and P7 are about 10ohm. I should put P3 to P6, and P4 to P7. And P1 to P5, an P2 to P8. what do you think?

 

[Perry Babin]

Are the power supply FETs shorted?

 

[fongman]

They are ok

 

[fongman]

I've found out that p1 and p2 are ground. P3 and p4 are power. P5 and p8 are also ground. P6 and p7 are power. I will install the transformer and see what happened?

 

[Perry Babin]

There is a problem if all of the resistances to ground are accurate. I don't know any way that the wires that go to the FETs could read 10 ohms or less to ground and the FETs not be defective. Are you sure it was 10 ohms and not 10k or 10M ohms?

 

[Perry Babin]

What do you mean 'power'? Connected directly (0 ohms) to the B+ terminal of the amp?

 

[fongman]

I was going to put p1 to p5, p2 to p8, p3 to p6, p4 to p7. Using the transformer.

 

[Perry Babin]

With the information that you've provided, I can't help any more than I have.

 

[fongman]

I understand. I finally put the transformer in and got the amp to power up. The protection light is on and so is the cliping light. Zacpo don't really want to sell parts so if i want to fix it i will have to send it in. They are about 2 hours from me. I might evern put it up on ebay because i think some body can use it for parts? Thanks for your help.