WOPL 400 Build Problem!

[laatsch55]

How many ohms are you showing when you check the pico fuses?

 

[nadude98]

Yeah, I am. I read the whole thread this past weekend. It's honestly scaring the shit out of me. But st least I know there is help available.

Dan, scared is good....! Just take your time.

 

[Gepetto]

Yeah, I am. I read the whole thread this past weekend. It's honestly scaring the shit out of me. But st least I know there is help available.

Takes nerves of steel Dan

 

[laatsch55]

Call him Steely Dan...

 

[nadude98]

How many ohms are you showing when you check the pico fuses?

Blew the pico fuse on the B+ of the right channel. I tested all the outputs and they tested good. Whew......

 

[laatsch55]

We asked that quite awhile ago, and you said you had checked them....so, all is well now??

 

[nadude98]

Call him Steely Dan...

LMAO That's a good one!

 

[nadude98]

We asked that quite awhile ago, and you said you had checked them....so, all is well now??

Nope, I had to take a time out.. just now getting back to it.

Checked VR1 that seems to be good as well as D80, by the TO-220 do you mean Q1?

 

[nadude98]

I might ask stupid questions.. I just want to make doubly sure I am doing this right!

 

[nadude98]

How many ohms are you showing when you check the pico fuses?

Rest of pico fuses are showing about 1-1.5 ohms

 

[orange]

I might ask stupid questions.. I just want to make doubly sure I am doing this right!

There are no stupid questions, only dumb moves from not asking.

 

[nadude98]

Nope, I had to take a time out.. just now getting back to it.

Checked VR1 that seems to be good as well as D80, by the TO-220 do you mean Q1?

Checked Q1, it tested good...

 

[nadude98]

We asked that quite awhile ago, and you said you had checked them....so, all is well now??

Nope, it's messed up..! Ordered new fuses.

 

[Gepetto]

Nope, it's messed up..! Ordered new fuses.

here is a debug hint. You can tack solder a 10 ohm resistor across the Pico fuse to help you pinpoint your problem area. Locate and fix your problem and then once fixed, replace the fuse else you will just get frustrated blowing fuses. There is a reason the fuse blew

 

[nadude98]

here is a debug hint. You can tack solder a 10 ohm resistor across the Pico fuse to help you pinpoint your problem area. Locate and fix your problem and then once fixed, replace the fuse else you will just get frustrated blowing fuses. There is a reason the fuse blew

okay, i'll do that. Thanks!

 

[nadude98]

Okay, here goes. When I tested the outputs at first, after blowing the pico fuse, I tried testing them using the ohms function and when I did that all the MJ21196's tested bad... When I did the diode test they tested ok. Well, I did as Joe suggested and tacked a 10ohm resistor in place of the pico fuse and am bringing up the amp with backplanes installed just like when a new install. I installed the bottom row of transistors and did a resistance check from output cases to chassis ground. The cases of the MJ21196's on both channels are measuring 2.8M ohms to ground....?

 

[laatsch55]

That's good...

 

[Danimal1969]

Call him Steely Dan...

I can't in good consciousness call myself that. It's a bit presumptuous. Lol.

 

[laatsch55]

Amen!! But we can....

 

[nadude98]

That's good...

Ignore some of the last post... doh!

Okay, the back planes are reinstalled, with all outputs, and with a 10ohm resistor in place of the pico fuse. I'm am triple checking everything.... and from here I will not do anything but what you tell me to do.

Here is where I'm at.



What would you like me to do next... ?