Rockford Fosgate T500-1bd

cajones65 · 2018-08-16 1:59 am

Yes sir, it was on pin 5 of u205. I have been getting high amplitudes on everything that I have been testing for some odd reason.

Perry Babin · 2018-08-16 2:15 am

Is you scope probe switchable 1x/10x?

cajones65 · 2018-08-16 2:19 am

Yes sir, I have it on 10x on probe and scope

Perry Babin · 2018-08-16 2:23 am

Does switching to 1x make a difference?

cajones65 · 2018-08-16 2:53 am

Perry, I just remembered that I changed probes and never checked the setting. Your are right, I will send another picture. WOW!!!

cajones65 · 2018-08-16 3:01 am

Here is the correct waveform. Sorry about that. Going to check the outputs again now.

cajones65 · 2018-08-16 3:45 pm

Perry still getting strange looking waveforms. Square wave with a spike in the top of it. This is the gate of 2015

Perry Babin · 2018-08-16 3:46 pm

Do you have the jumper in the resistor and capacitor?

cajones65 · 2018-08-16 3:47 pm

No sir, I do not. I removed them last night.

Perry Babin · 2018-08-16 3:57 pm

The jumper is used to move the drive closer to a 50% duty cycle.

cajones65 · 2018-08-16 4:07 pm

Do I need to reinstall it?

Perry Babin · 2018-08-16 10:07 pm

cajones65 · 2018-08-16 10:55 pm

Ok Perry, the jumper is back on. What measurement do we need now?

cajones65 · 2018-08-16 11:02 pm

Perry do I need to remove the rectifiers from the circuit, along with the jumper?

Perry Babin · 2018-08-16 11:06 pm

Yes. remove the rectifiers (lift center terminal)

cajones65 · 2018-08-16 11:24 pm

alright got that done

Perry Babin · 2018-08-16 11:26 pm

Waveform?

cajones65 · 2018-08-16 11:34 pm

No sir I don't have a wave on any gates

Perry Babin · 2018-08-16 11:37 pm

Do you have supply voltage on pins 4 and 8 of U205?

cajones65 · 2018-08-16 11:38 pm

I do however have a good wave on D2003 and D2004 anode