DIGITREX CTF3271 PSU bsfp3220004ad

[selldoor]

Re: DIGITREX CTF3271 PSU bsfp3220004ad

Lots of voltage regulators to test?
Here is the data sheet for the IC1 - Dont know how to test other than for voltage in.
Can find anything on an EZ949 - can you check the number E2949 BZ949 B2949 ?

[is_it_a_bird]

Re: DIGITREX CTF3271 PSU bsfp3220004ad

Ok thanks, those diodes all seem to check out ok on the reverse

I am getting 14v on vcc of ic1 but nothing from anywhere else, shouldnt I be getting something from pin GD, gate driver, or will that be just a start up voltage to wake up the fets

[martyparish]

Re: DIGITREX CTF3271 PSU bsfp3220004ad

Have you considered changing the caps? Those look like crapXcon...

[is_it_a_bird]

Re: DIGITREX CTF3271 PSU bsfp3220004ad

Grrrr IPOS150's come back all is forgiven,

Have you considered changing the caps? Those look like crapXcon...

Spoke to a friend earlier who checked a database with a different model with the same board and it recommended replacing the 5 caps mentioned in an earlier post, did this along with all the other secondary caps and there is no change still exactly the same

[martyparish]

Re: DIGITREX CTF3271 PSU bsfp3220004ad

ah my apologies, I missed that post I guess

[is_it_a_bird]

Re: DIGITREX CTF3271 PSU bsfp3220004ad

Anyone give me anymore pointers on this as I have been sat here for another 2hours and still cant get the 12 or 24v to kick in

Could I also ask why am I getting 4.5v on the 5v rails but the 5vsb is sat at 5.03 volts and is 4.5 little low?

Really want to get this one sorted as I always seem to see this board with the same fault and no cure on the tinternet for it.

Thanks again in advance

[selldoor]

Re: DIGITREX CTF3271 PSU bsfp3220004ad

Did you test the voltage regulators on the main board?

Did you try pulling the ps pin to ground to see if its a pin low switch
there have been a few posts recently with that oddity. I will try and look for one later. Having a disaster with my cookies here - cant get into ebay on
my laptop and I use it all the time.

[is_it_a_bird]

Re: DIGITREX CTF3271 PSU bsfp3220004ad

Did you test the voltage regulators on the main board?

VR-EH16A or equivalant sot23-1117-33 which states a 1.2 v drop and that is exactly what they are all doing

Did you try pulling the ps pin to ground to see if its a pin low switch
there have been a few posts recently with that oddity.

Can you just expand on this a little, do I just put ps to ground...sorry for sounding stupid

[is_it_a_bird]

Re: DIGITREX CTF3271 PSU bsfp3220004ad

Can anyone give me pointers on how to boot the PS as a stand alone to see if the 12 & 24v kick in or the main is at fault.

Thanks

[is_it_a_bird]

Re: DIGITREX CTF3271 PSU bsfp3220004ad

Managed to sort a supply by putting a 2.2k resistor between ps and 5v, still nothing, not a dicky bird

Where do I need to start looking now????