CAB 2000.1 Protection Flashing

[Perry Babin]

Having all 4 with jumpers is OK. I was referring to the jumpers on the transformer that's been causing the problems.

 

[40HRZZ]

I have all 4 connections circled desoldered and jumpered to the board individually to their respective pads.

 

[Perry Babin]

OK, so you only have jumpers on one transformer.

I thought you had desoldered the outer secondary windings on both transformers to see if the problem would be duplicated with the windings of the other transformer desoldered.

For the problem transformer, were the jumpers (when you had 2) on the outer terminals?

Do you have the lamp?

 

[40HRZZ]

Yes I am only.working with the problem transformer.

Jumpers we're on outer secondary windings. Desoldered amp has good square wave but when attached I get the flashing protect.

I can use a simple incandescent bulb for brake light tomorrow.

 

[Perry Babin]

a 12v lamp won't be able to take the voltage if there is a problem. It needs to be a 120v bulb.

 

[40HRZZ]

I'll get something lined out where will I solder that in at.

 

[40HRZZ]

Perry I have this with a 25W 120V incandescent bulb. How do I solder it in and what am I checking? I really appreciate the help learning more everyday.

 

[40HRZZ]

Picture

 

[Perry Babin]

Don't cut the plug off of it. Either run wire through the holes in each prong or use push-on connectors to connect to the plug.

Make sure it's in the on position (measure across the prongs to make sure it's not an open circuit. Solder one wire to one of the outer secondary wires. The other wire will go to that secondary terminal was soldered to the board. You are replacing your jumper wire with the lamp. Disconnect the jumper for the other secondary winding. What happens when you try to power up the amp?

 

[40HRZZ]

I have the light in circuit of one of the outer secondary windings and the other one disconnected and it still flashes in and of protect.

 

[Perry Babin]

Is the bulb trying to light up?

Try it in the other secondary winding to see if it does the same thing.

 

[40HRZZ]

I have the center two windings still jumpered to the board and the outer two disconnected with light out of circuit and it is flashing in and out. It only builds the square was e completely when all four windings are desoldered that I pictured earlier.

 

[40HRZZ]

Let me see if it is trying to light up

 

[Perry Babin]

What is the resistance from the B+ terminal to each of the secondary windings. Disconnect them from the jumpers and bulb if it's easy to do.

 

[40HRZZ]

I have tried both sides and it is the same result either side.

The light is not trying to illuminate.

 

[Perry Babin]

Did you see #54?

 

[40HRZZ]

The red windings are O.L. past Mohms and the copper windings are 11.5 Mohms.

 

[Perry Babin]

Of the single-strand windings, how many read near 0 ohms to any of the solder pads where the secondary winding were soldered? Remove all jumpers.

 

[40HRZZ]

None of them read near 0 ohms. 1 copper color winding charges a capacitor on the middle two pads.

 

[Perry Babin]

It must be different from the AQ2200. The AQ has one winding that should connect to the center tap.