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

Rockford Fosgate M400-4D
Rockford Fosgate M400-4D
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 October 2017, 04:21 PM   #11
josesony68 is offline josesony68  Spain
diyAudio Member
 
josesony68's Avatar
 
Join Date: Feb 2011
Location: Caceres
Rail tension is present (48.8v) in the two metallic strips that are observed in the photo, I suspect that B- is the longest strip, from there taking the negative tip of the multimeter in B-, and the positive in the drain of the FETS of the out stage are observed 25v and 48.8v respectively in each pair of FETS.

Pin 10 of each IRS2092 is -24.7V with the negative probe of the multimeter to the negative of the amplifier.
On pins 1 and 6 there are 4.58v and -5.38v respectively.

The power LED on the amplifier is shown in the two colors red / blue
  Reply With Quote
Old 10th October 2017, 04:22 PM   #12
josesony68 is offline josesony68  Spain
diyAudio Member
 
josesony68's Avatar
 
Join Date: Feb 2011
Location: Caceres
picture
Attached Images
File Type: jpg DSCN4136.JPG (701.5 KB, 50 views)
  Reply With Quote
Old 10th October 2017, 04:56 PM   #13
josesony68 is offline josesony68  Spain
diyAudio Member
 
josesony68's Avatar
 
Join Date: Feb 2011
Location: Caceres
I can not find the way to see square waveform out of the power supply ...
  Reply With Quote
Old 10th October 2017, 06:57 PM   #14
MarioRestucci is offline MarioRestucci  Italy
diyAudio Member
 
MarioRestucci's Avatar
 
Join Date: Aug 2012
Location: NAPOLI
Vcc on pins 10 must be measured with black probe on -b....
You must see 12v.
4.58v on Pin 1 maybe is wrong.
-b, +b, +/- preamp voltages, -/+5.6v must be measured with black probe on gnd (Central tap of secondary winding of transformer).
  Reply With Quote
Old 10th October 2017, 07:13 PM   #15
josesony68 is offline josesony68  Spain
diyAudio Member
 
josesony68's Avatar
 
Join Date: Feb 2011
Location: Caceres
on pin 10 measured with B- with probe black is 0v.

pin 1 preamp voltajes is 5.48v
  Reply With Quote
Old 10th October 2017, 07:35 PM   #16
MarioRestucci is offline MarioRestucci  Italy
diyAudio Member
 
MarioRestucci's Avatar
 
Join Date: Aug 2012
Location: NAPOLI
Quote:
Originally Posted by josesony68 View Post
on pin 10 measured with B- with probe black is 0v.

pin 1 preamp voltajes is 5.48v
Maybe I explained myself wrong!
When I talked about pin 1, 6 and 10, I was referring to 4 irs2092S.
For this reason, on the pins 1 and 6 of all the IRS2092S there should be 5.6volt (with black probe on PIN 2 of all IRS2092S) instead, on all pins 10 (of all IRS2092S) there must be 12volt (with black probe on -B).
When I talked about "preamplifier voltages" i meant the DUAL voltage present on the preamplifier board that isn't SINGLE 12volt, but usually +/-12v (if are installed TL072) and you must see this on pin 4 and 8 of all op-amp (with black probe on pin 2 of all IRS2092S)
If u have big different voltages on pin 1 and 6 of all IRS2092S probably u have problems with this part of circuit or a defective IRS2092S.
If u have 0 volt on pin 10 of all IRS2092S (with black probe on -b) you have surely a bad regulator (and probably, this is the main cause of your issue).
Unfortunely, RF do not share schematics of this new amp model, so we have to arrange it.

Last edited by MarioRestucci; 10th October 2017 at 07:37 PM. Reason: add
  Reply With Quote
Old 10th October 2017, 08:42 PM   #17
josesony68 is offline josesony68  Spain
diyAudio Member
 
josesony68's Avatar
 
Join Date: Feb 2011
Location: Caceres
No, you have not explained wrong, maybe there is some point that I did not understand well ...
I've always been measuring pins 1, 6 and 10 on all four IRS2092s.
On pins 1 and 6 of all IRS2092 there is +/- 4.99v measured with the black probe on pin 2 (there is no difference in any IRS2092)
Pin 10 continues without voltage

What I do not understand is when you say:
When I talked about the "preamplifier voltages" I was referring to the DUAL voltage present on the preamplifier board that is not SINGLE 12volt, but usually +/- 12v (if TL072 is installed) and you should see this on pin 4 and 8 of all op -amp (with black probe on pin 2 of all IRS2092S)

Do you mean the preamplifier board that contains the operational circuits 4580?
  Reply With Quote
Old 10th October 2017, 09:44 PM   #18
MarioRestucci is offline MarioRestucci  Italy
diyAudio Member
 
MarioRestucci's Avatar
 
Join Date: Aug 2012
Location: NAPOLI
Quote:
Originally Posted by josesony68 View Post

Do you mean the preamplifier board that contains the operational circuits 4580?
Yes of course! But at this point i think that the preamp board work correctly.
-B and +B (with black probe on Pin 2 of irs2092s ) are identical and symmetric?
I dont understand but I've read this:
Quote:
I suspect that B- is the longest strip, from there taking the negative tip of the multimeter in B-, and the positive in the drain of the FETS of the out stage are observed 25v and 48.8v respectively in each pair of FETS.
can you explain me better?
  Reply With Quote
Old 11th October 2017, 09:01 AM   #19
josesony68 is offline josesony68  Spain
diyAudio Member
 
josesony68's Avatar
 
Join Date: Feb 2011
Location: Caceres
-B and +B (with black probe on Pin 2 of irs2092s ) are identical and symmetric, have a very small variation.

I was saying:
Taking the black probe of the multimeter in B-, and red probe of the multimeter in the central pin of a FET (for example, the first one to the left of the board) of audio output, I observe 25V and taking reading to the FET that is next to him I observe 48,8V.
These measurements are observed by each pair of FETS, ie looking at the board and watching the eight output FETS, if one has 25V the next has 48.8V the next 25V, the next 48.8V and so all
  Reply With Quote
Old 11th October 2017, 10:41 AM   #20
MarioRestucci is offline MarioRestucci  Italy
diyAudio Member
 
MarioRestucci's Avatar
 
Join Date: Aug 2012
Location: NAPOLI
Quote:
Originally Posted by josesony68 View Post
-B and +B (with black probe on Pin 2 of irs2092s ) are identical and symmetric, have a very small variation.

I was saying:
Taking the black probe of the multimeter in B-, and red probe of the multimeter in the central pin of a FET (for example, the first one to the left of the board) of audio output, I observe 25V and taking reading to the FET that is next to him I observe 48,8V.
These measurements are observed by each pair of FETS, ie looking at the board and watching the eight output FETS, if one has 25V the next has 48.8V the next 25V, the next 48.8V and so all
Measuring the voltage between drain of fets and -b is wrong.
If you want, can measure +b and -b like this:
- black probe on pin2 of IRS2092S
- red probe on leg 2 of hi-side fet (now you must see +b= 48v)
- red probe on leg 3 of low-side fet (now you must see -b=-48v)
any little differences (decimal volts) it's not important/relevant.
So, if you have tested and no problems found, your primary problem is the absence of VCC.
Go backwards in the circuit and found the regulator or the part of circuit that provide to create VCC. If u can, share photos here!
  Reply With Quote

Reply


Rockford Fosgate M400-4DHide 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
rockford fosgate megael9 Car Audio 1 1st May 2017 06:28 PM
Rockford Fosgate BD15001 S Merlington Car Audio 4 14th December 2012 08:51 AM
Rockford fosgate 4.6 X mike49504 Car Audio 14 28th May 2011 03:35 PM
Rockford Fosgate dtisme Car Audio 1 5th October 2010 11:39 PM
Rockford Fosgate 1500bd mike49504 Car Audio 52 26th March 2010 02:46 AM


New To Site? Need Help?

All times are GMT. The time now is 05:06 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