Go Back   Home > Forums > >
Home Forums Rules Articles diyAudio Store Blogs Gallery Wiki Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

JL 600/1 v3 failure
JL 600/1 v3 failure
Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Reply
 
Thread Tools Search this Thread
Old 1st December 2016, 07:12 PM   #11
Perry Babin is offline Perry Babin  United States
diyAudio Member
 
Join Date: Nov 2003
Location: Louisiana
Try the ones you ordered. They may work. The 540s were reliable. I used the IRF3415 plenty of times as well as the IRF3710Z.
  Reply With Quote
Old 1st December 2016, 09:09 PM   #12
dhillman is offline dhillman
diyAudio Member
 
Join Date: Nov 2015
Thank you, 1 of the 47 ohms surface mount resistance changed in color. How do I test the U500? Or is it better to replace it? Thank you again!

Darrel
  Reply With Quote
Old 1st December 2016, 09:56 PM   #13
Perry Babin is offline Perry Babin  United States
diyAudio Member
 
Join Date: Nov 2003
Location: Louisiana
Do you have or have access to an oscilloscope?
  Reply With Quote
Old 1st December 2016, 11:33 PM   #14
dhillman is offline dhillman
diyAudio Member
 
Join Date: Nov 2015
Yes I do!
  Reply With Quote
Old 2nd December 2016, 06:29 AM   #15
Perry Babin is offline Perry Babin  United States
diyAudio Member
 
Join Date: Nov 2003
Location: Louisiana
With the output FETs out of the board, connect two jumpers as shown below. Apply remote and after a couple of seconds, remove remote voltage and check the signal on pad 1 for all 4 of the outputs. There should be a square wave for about 10 seconds after removing remote voltage.

The power supply FETs don't have to be in the circuit.

Set the scope to 5v/div, DC coupling and 5us/div. Align the trace to the reference line before checking the waveforms.
Attached Images
File Type: jpg IMG_6448bx.jpg (72.0 KB, 70 views)
  Reply With Quote
Old 2nd December 2016, 08:24 PM   #16
dhillman is offline dhillman
diyAudio Member
 
Join Date: Nov 2015
Thank you, when you say output, you are talking about the gate for each FET?

Thank you, I will try this tonight.

Darrel
  Reply With Quote
Old 2nd December 2016, 08:34 PM   #17
Perry Babin is offline Perry Babin  United States
diyAudio Member
 
Join Date: Nov 2003
Location: Louisiana
Yes
  Reply With Quote
Old 5th December 2016, 11:39 AM   #18
dhillman is offline dhillman
diyAudio Member
 
Join Date: Nov 2015
Well I read several times the section on the oscilloscope at your website. This is not exactly my terminology. I have a Hitachi V-252 with a slanted display. I think it fell off. Q504(pad 1)- 14v, Q505- 0v then at the end 4v, Q506- 28v, Q507- 0v. I never saw a square wave. I think that was either my set-up or the instrument.

If you notice any huge mistake in what I'm doing, please let me know. Where should I attach the alligator clip?

Thank you again.

Darrel
  Reply With Quote
Old 5th December 2016, 04:32 PM   #19
Perry Babin is offline Perry Babin  United States
diyAudio Member
 
Join Date: Nov 2003
Location: Louisiana
There is a trace rotate adjustment on the scope. Find it and set the trace straight. Magnets will also cause it to rotate/shift.
  Reply With Quote
Old 5th December 2016, 07:36 PM   #20
dhillman is offline dhillman
diyAudio Member
 
Join Date: Nov 2015
Thank you Perry. Would you say the Chip at the U500 is bad? Why do I have this different readings from each pad? Could it be the driver transistors? What is the driver voltage at the gate of each transistor? Do they run in parallel for each channel?

I will try to get readings with some attached images to check on this chip.

Thank you

Darrel
  Reply With Quote

Reply


JL 600/1 v3 failureHide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
HD 600/4 JL ian33 Car Audio 7 8th June 2016 07:12 AM
amp stopped working (jl 600/1v2) 4x4audio Car Audio 15 16th November 2015 12:34 AM
JL Audio HD 600/4 S Merlington Car Audio 12 9th April 2015 08:39 AM
jl audio hd 600/4 issue with rear left channel srsotor Car Audio 3 22nd January 2015 10:43 AM
A300HLX Amp 600 Watt JL Audio Sub Maxcloud Car Audio 2 30th April 2008 12:02 AM


New To Site? Need Help?

All times are GMT. The time now is 08:01 PM.


Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 15.00%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Copyright ©1999-2018 diyAudio
Wiki