Rockford 401s repair question, and update.

[blakktalon]

now that i have the transformer removed from the amp, can i test it with a 1.5 volt battery for shorts, it all looks good now that i got the baked glue stuff off it.

I was to much of a sissy to try to power it up even with a current limiter. I wanna postpone the noob smoke, pop, and sizzle as long as possible, not to mention replacing the parts I just replaced.

I replaced the irfz44's Q6,10,11,7. The 100 ohm(R36,19,20,45) resistors on the way to the (q5,2,1,4)driver transistors are all fine. I havent checked the control ic, yet because not powering this up just yet.

Is there anything I am missing, or doing wrong so far?

[Perry Babin]

If this applies to an amp in another thread, copy and paste the text above into the old thread. There's no way to keep up with what's been done without having it part of one continuous thread.

[blakktalon]

no I did another thread asking which mosfet to get. but I did it in parts, and nobody replied. I since answered my own question. Since then I have just been reading, lots here, and your tutorial, and on the interweb.

[Perry Babin]

I don't know how you would test with a 1.5v battery.

It's best to test the transformer in the board because simply moving the terminal windings slightly can break the short and make it appear that the transformer is OK.

With a proper current limiter and the transistors tightly clamped to the sink, there's virtually no way to damage the new parts.

Power it up with the remote and ground only (no B+). Measure the DC voltage on the gate legs of each of the power supply transistors. They should all read ~5v.

Why do you think the transformer is defective?

[blakktalon]

The adhesive/glue was all brown and nasty burnt looking. All the other ones I have seen looked clean and and nice. Now that i cleaned it off it looks fine, no bare copper spots in the coating. I will put it back in, and give it a test tomorrow.