Memphis 16-1000d - diyAudio
Go Back   Home > Forums > General Interest > Car Audio

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 10th March 2014, 01:31 AM   #1
diyAudio Member
 
Join Date: Nov 2012
Exclamation Memphis 16-1000d

Can anyone tell me the difference between the circuitry of the 16-1000d compared to the 16-st1000d im assuming the one isn't a studio version however im working on this amp for repair and it just has static snowy sound coming from the outputs so my first guess was to check the drivers on the riser board but im unsure which ones are the drivers cause the circuitry seems to be labeled on the board different instead of example Q13 it would be R13 can anyone help?
  Reply With Quote
Old 24th March 2014, 12:43 AM   #2
diyAudio Member
 
Join Date: Nov 2012
I ended up swapping out the bjt's all a1266 on the riser board but did not see any results it appears that the drivers are not being powered because when the amps idling there not getting warm when the amps powered up
  Reply With Quote
Old 25th March 2014, 04:04 AM   #3
diyAudio Member
 
Join Date: Jun 2002
Location: non
I find memphis, directed, orion, and kicker impulse all use the same exact circuitry. with a few small differences in the head-end. (preamp-processing side).

the newer kicker stuff uses the same modulator, just different output/driver stages.

Even more proof, I pulled the driver boards out of an orion that was trashed, and stuck them in a memphis mojo and inter-bred them. dropped right in, and worked fine. lololol.

I assume that they all hired the same engineer, or bought from one-another. Eh. I digress...

Last edited by mbates14; 25th March 2014 at 04:06 AM.
  Reply With Quote
Old 25th March 2014, 04:10 AM   #4
diyAudio Member
 
Join Date: Nov 2012
Thanks for the info I didn't know that do you have any ideas where to go on the no sound the drivers aren't getting hot I replaced them because they were cold when fired up then I tested them later and found out they were .727 v a1266 bjt's I replaced these on my other Memphis 1000d studio amp worked perfectly but all I get is a wind sound every once in awhile through the speakers
  Reply With Quote
Old 25th March 2014, 04:13 AM   #5
diyAudio Member
 
Join Date: Jun 2002
Location: non
You need to check the 2 large zener diodes on each driver board, along with thier associated resistors. they tend to short/open and fail to supply power to that board at that point.

Also, you need to make sure your +/-60v and +/-15v are present. the +/-15v regulators and inductors love to go bad. sometimes explosively! the voltage test points should be marked.

also dont forget those 1 ohm resistors that connect the transistors together, if one or more of the driver transistors fail, it takes the SMD 1 ohm resistors with them.

Last edited by mbates14; 25th March 2014 at 04:16 AM.
  Reply With Quote
Old 25th March 2014, 04:15 AM   #6
diyAudio Member
 
Join Date: Nov 2012
the driver boards inline with the heat sink fets not the driver board I replaced the a1266s off of?
  Reply With Quote
Old 25th March 2014, 04:16 AM   #7
diyAudio Member
 
Join Date: Nov 2012
do you have you a photo of the board that you could point them out for me?
  Reply With Quote
Old 25th March 2014, 04:27 AM   #8
diyAudio Member
 
Join Date: Jun 2002
Location: non
well the driver in the center with the F16 and B52 chip? Well that is the modulator board. not the driver board.

I dont have a picture handy youll need to ask perry for that if he has one. That board is even more critical to the +/-15V rail. If your missing either rail, itll pin the speaker output to full rail voltage.

Also the B52 chip which is an LM361, is sensitive to voltage fluctuations and is easily damaged.

You need a good scope, You can remove the drive wire coming from the modulator (gray cable daisy chained between the risers) and scope the pulse. if its a noisy mess, the problem is in your modulator. If its a nice clean square wave, the problem is in the driver boards.

if your A1266 transistors were in fact damaged on your modulator board, you will probably need to replace the associated TL431s AND the B52 chip. (LM361). Then check the stability of your +/-15V feeding that board so you dont cook it again.

Last edited by mbates14; 25th March 2014 at 04:30 AM.
  Reply With Quote
Old 25th March 2014, 04:29 AM   #9
diyAudio Member
 
Join Date: Nov 2012
ok I think I know what your talking about now the board next to the coils there only 1 the other 2 run along the heatsinks
  Reply With Quote
Old 25th March 2014, 04:32 AM   #10
diyAudio Member
 
Join Date: Jun 2002
Location: non
Quote:
Originally Posted by Exbass17 View Post
ok I think I know what your talking about now the board next to the coils there only 1 the other 2 run along the heatsinks
The boards that run along heatsinks, directly in front of your FETs, are the driver boards. They just drive the FETs based off the signal coming from that small gray coax cable.

The board in the middle, perpendicular to those two, have 2 big dip chips. Thats the modulator. You need to scope the drive signal on that 2 pin coax wire to isolate your problem.

But troubleshooting 101: When in doubt, check voltages!
  Reply With Quote

Reply


Hide 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
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Memphis 1000D Exbass17 Car Audio 91 22nd December 2013 03:55 AM
Help with Memphis 1000D's project pat Car Audio 63 19th September 2011 06:02 AM
memphis 1000d timwebb Car Audio 36 28th August 2011 11:30 PM
another memphis 1000d timwebb Car Audio 3 11th April 2011 03:14 AM
Memphis 1000D transformer. tgdrums1990 Car Audio 4 16th June 2010 03:32 PM


New To Site? Need Help?

All times are GMT. The time now is 06:08 PM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright 1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2