|
Audio Asylum Thread Printer Get a view of an entire thread on one page |
For Sale Ads |
91.37.60.200
In Reply to: RE: P24 current measurements. posted by gene_ on November 22, 2009 at 07:47:59
Hi Gene,
many thanks for your post, and welcome to the Asylum! :-)
This is very interesting! So do I understand you correctly, you ARE able to power up the computer manually without ATX power supply? So you switch on P4 rail, power for Juli@, and 3.3V, 5V and 12V, then you push the computer's start button, and then you switch on PowerGood - and the computer boots up? Is that how you do it and that works?
I don't think though that you need -12V at all, I never had connected it in my setups.
Thank you,
Robert
Follow Ups:
Hi Robert,
As you can see from picture there is no any ATX PSU in a MP^2 ,
and I do power up my MP^2 one month with only one error
( battery -9v was dead , I put exstra swich for disconecting)
My linear external PSU has two AC switches, one for HDD supply and another for the rest three +12, +12, +5v.
Battery , Pawer Good and Charger switches all placed on front of MP^2.
Best, Gene.
- Can you power CPU (P4) using the "dirty" PS? You should get an improvement.
- Do you have a circuit diagram with powering sequence for P24?
Hi Cics,
many Thanks for Great Project. I never listen CD before, tryed a lot.
1.I use 4 linear PSU : +12v (3A) for CPU, (+4700mf cap, +47mf Tube cap)
+12v (3A) for MOBO,(+ 4700mf cap, +47mf Tube cap)
+5v (6A) for MOBO,(+9400mf cap, +47mf Tube cap )
+5V (3A) for HDD.( also as a charger for 3.3v)
Use 1 battery +3.3v for July@ ( + 47mf Tube Cap)
3 battery +3.3v for MOBO (+ 47mf Tube Cap)
1 battery -9v for MOBO
so as you see , all separate.
2. I do swich first -9v, HDD, then by one swich all three linear then 3.3v for MOBO and 3.3v for JUly@ - last one Power Good.
I can restart computer from my sofa.
Best Gene.
Hi Robert, thanks for welcome
I do need -12v, if I forgot swiching on -12v , HDD light not flasning
computer never boot.
It is not very complicated rewire computer, it is just look scary .
I use this set up about one month , for MOBO 3.3v- I use three battery
not two as I said in last post .
Will try send a picture PSU and Computer.
Best, Gene.
Hi Robert, thanks for welcome
I do need -12v, if I forgot swiching on -12v , HDD light not flasning
computer never boot.
It is not very complicated rewire computer, it is just look scary .
I use this set up about one month , for MOBO 3.3v- I use three battery
not two as I said in last post .
Will try send a picture PSU and Computer.
Best, Gene.
Hi Greg,
yes, you're right, I remember the -12v rail needs to be present at the time the computer startup process is started by pushing the start button. Once the power up process has started it can be switched off and isn't needed anymore.
I have tried switching all the "special" lines in different timings and sequences before but hadn't succeeded. I must have overlooked something, I'll try switching PowerGood separately. That will help a lot - thank you Greg for reporting this!
Best,
Robert
Post a Followup:
FAQ |
Post a Message! |
Forgot Password? |
|
||||||||||||||
|
This post is made possible by the generous support of people like you and our sponsors: