Fortron FSP-ATX-400PNF

**willawake** · 01-12-2007, 04:45 AM

I am using these for replacements in the office.

dual rail 12v which is not exactly what i need though

Passive pfc

**willawake** · 01-12-2007, 04:48 AM

**willawake** · 01-12-2007, 04:50 AM

jamicon, teapo, capxon

last one. 20+4 atx

davmax · 01-12-2007, 08:14 PM

I see this PS has plenty of Teapo caps and Jamicon 3300u 10V. I would be rather sus of the latter caps. The old trick of using low grade caps uprated from 6.3V to 10V.

**willawake** · 01-13-2007, 05:46 AM

Quote:

The old trick of using low grade caps uprated from 6.3V to 10V.

well its a pretty common trick though, especially in PSUs.

bgavin · 02-13-2007, 08:35 AM

If one wanted to measure a PSU suspected of doing this, is it simply a matter of measuring the voltage across the cap in question while power is applied?

Or is there a surge voltage that isn't apparent with this method?

**willawake** · 02-13-2007, 09:09 AM

there is 3.3v, 5v and 12v rails, why would you need to measure?

bgavin · 02-13-2007, 01:49 PM

To see if a 6.3v good quality cap is sufficient where they are using a cheap 10v cap.

I see many mentions of where caps of higher voltage are used without an underlying requirement.

**willawake** · 02-13-2007, 02:18 PM

probably safer to do it on a molex. recommended to check on various levels of load and no load. it is probably ok though.

with higher voltage though, sometimes much better specs in same diameter just taller. even in the good caps.

bgavin · 02-13-2007, 06:22 PM

I was more concerned about cheap caps in 16v in 10mm diameter vs. premium cap in 10v and 10mm diameter. The oddball Teapo and Fuhkyyu 1650uF and 1800uF are in 10mm diameter. It is harder for me to find matching premium caps in the same diameter.

Daijoubu · 03-15-2007, 10:43 PM

Mine have OSTs for the big ones and the ball bearing version of the Yate Loon fan (D12BH-12)

Daijoubu · 03-19-2007, 09:33 PM

Has no PFC too (I'm in Canada)

Big Pope · 03-22-2007, 10:24 PM

willawake,

Would you tell me the value capacitance and diameter of large can input caps(Teapo)?

**willawake** · 03-25-2007, 04:01 AM

they are Teapo LXK 820uf 200v.
looking at the spec sheet they would be either 25x30 or 35x30. I will pull the psu to check, when i can.

Big Pope · 03-27-2007, 10:31 AM

Quote:

Originally Posted by willawake

they are Teapo LXK 820uf 200v.
looking at the spec sheet they would be either 25x30 or 35x30. I will pull the psu to check, when i can.

Thanks, because i want to replace it with Samxon EP series for testing, so i need to know the diameter first.

nsx29 · 03-27-2007, 02:13 PM

I have seen testing by others that indicate high ripple with this psu. The primary cap of 820uf 200V is kinda small for a 400w.

I open this HEC 350 watt which have a pair of 1000uf 200V by capxon. This PSU is from 2001. THe secondary caps are domed (fujuyyu caps). I don't know why in this psu use 470uf 35V on and 400uf 25V on the secondary side. I don't think psu need 25 and 35V on the secondary. I will update with picture in the build thread.

**kc8adu** · 03-27-2007, 06:12 PM

watch for those 25v caps to be on the -5 and -12.
they are filters before the regulator ic for the 2 lines.
since supply has to be well above the target for the common 78xx and 79xx a 16v cap wont do and give any headroom.

skafiskafnjak · 04-07-2007, 11:51 PM

I am using these power supplies in all my custom built PC's for a long time and never had any problem with them.

mzperx · 10-18-2010, 05:28 PM

I have 2 of these PSU laying around with bad caps. One of the 2 CAPs in the middle (Teapo 1000uF 10V) are dead on both.

I wonder if it originates from the capacitor quality or maybe the motherboard what it worked with killed it.. (I found these)

I would change them, but I have only 1 such capacitor in my inventory but that has greated diameter, or I have some (a lot) nichicon 1000uF 6.3V caps.. oh and a Jee 1000uF 16V.
Jee is low quality as I read, but maybe it is oversized enough not to die?

Also would it be enough to change 1 cap on both, or both caps since they are identical, and I guess the other can fail as well?

shovenose · 10-18-2010, 06:03 PM

fsp is a decent psu oem, but the love crap caps!

01-12-2007, 08:14 PM	#4
davmax Badcaps Veteran Join Date: Dec 2005 City & State: Perth Western Australia Posts: 886	Re: Fortron FSP-ATX-400PNF I see this PS has plenty of Teapo caps and Jamicon 3300u 10V. I would be rather sus of the latter caps. The old trick of using low grade caps uprated from 6.3V to 10V. __________________ Gigabyte EP45-DS3L Ultra Reliable (Power saver) Intel E8400 (3000Mhz) Bios temps. 4096Mb 800Mhz DDR2 Corsair XMS2 4-4-4-12 160Gb WD SATAII Server grade Nvidia 8500GT 256Mb 160Gb WD eSATAII Server grade for backup. Samsung 18x DVD writer Pioneer 16x DVD writer + 6x Dual layer 33 way card reader Windows XP Pro SP3 Thermaltake Matrix case with 430W Silent Power 17" Benq FP737s LCD monitor HP Officejet Pro K5300 with refillable tanks

02-13-2007, 08:35 AM	#6
bgavin Badcaps Veteran Join Date: Jan 2007 City & State: Orangevale, CA Posts: 1,350	Re: Fortron FSP-ATX-400PNF If one wanted to measure a PSU suspected of doing this, is it simply a matter of measuring the voltage across the cap in question while power is applied? Or is there a surge voltage that isn't apparent with this method?

02-13-2007, 09:09 AM	#7
willawake Super Modulator Join Date: Nov 2003 City & State: Αθήνα Posts: 7,973	Re: Fortron FSP-ATX-400PNF there is 3.3v, 5v and 12v rails, why would you need to measure?

02-13-2007, 01:49 PM	#8
bgavin Badcaps Veteran Join Date: Jan 2007 City & State: Orangevale, CA Posts: 1,350	Re: Fortron FSP-ATX-400PNF To see if a 6.3v good quality cap is sufficient where they are using a cheap 10v cap. I see many mentions of where caps of higher voltage are used without an underlying requirement.

02-13-2007, 02:18 PM	#9
willawake Super Modulator Join Date: Nov 2003 City & State: Αθήνα Posts: 7,973	Re: Fortron FSP-ATX-400PNF probably safer to do it on a molex. recommended to check on various levels of load and no load. it is probably ok though. with higher voltage though, sometimes much better specs in same diameter just taller. even in the good caps.

02-13-2007, 06:22 PM	#10
bgavin Badcaps Veteran Join Date: Jan 2007 City & State: Orangevale, CA Posts: 1,350	Re: Fortron FSP-ATX-400PNF I was more concerned about cheap caps in 16v in 10mm diameter vs. premium cap in 10v and 10mm diameter. The oddball Teapo and Fuhkyyu 1650uF and 1800uF are in 10mm diameter. It is harder for me to find matching premium caps in the same diameter.

03-15-2007, 10:43 PM	#11
Daijoubu New Member Join Date: Mar 2007 Posts: 5	Re: Fortron FSP-ATX-400PNF Mine have OSTs for the big ones and the ball bearing version of the Yate Loon fan (D12BH-12)

03-22-2007, 10:24 PM	#13
Big Pope Approved Vendor Join Date: Dec 2005 City & State: Hong Kong Posts: 380	Re: Fortron FSP-ATX-400PNF willawake, Would you tell me the value capacitance and diameter of large can input caps(Teapo)? __________________ My SAMXON Capacitors Database HERE!! X-CON is a new brand for SAMXON's Polymer Capacitors.

03-25-2007, 04:01 AM	#14
willawake Super Modulator Join Date: Nov 2003 City & State: Αθήνα Posts: 7,973	Re: Fortron FSP-ATX-400PNF they are Teapo LXK 820uf 200v. looking at the spec sheet they would be either 25x30 or 35x30. I will pull the psu to check, when i can.

03-27-2007, 02:13 PM	#16
nsx29 Member Join Date: Jan 2006 City & State: CANADA Posts: 26	Re: Fortron FSP-ATX-400PNF I have seen testing by others that indicate high ripple with this psu. The primary cap of 820uf 200V is kinda small for a 400w. I open this HEC 350 watt which have a pair of 1000uf 200V by capxon. This PSU is from 2001. THe secondary caps are domed (fujuyyu caps). I don't know why in this psu use 470uf 35V on and 400uf 25V on the secondary side. I don't think psu need 25 and 35V on the secondary. I will update with picture in the build thread.

03-27-2007, 06:12 PM	#17
kc8adu Super Moderator Join Date: Nov 2003 City & State: dayton ohio Posts: 6,436	Re: Fortron FSP-ATX-400PNF watch for those 25v caps to be on the -5 and -12. they are filters before the regulator ic for the 2 lines. since supply has to be well above the target for the common 78xx and 79xx a 16v cap wont do and give any headroom.

04-07-2007, 11:51 PM	#18
skafiskafnjak New Member Join Date: Aug 2006 City & State: Canada Posts: 14	Re: Fortron FSP-ATX-400PNF I am using these power supplies in all my custom built PC's for a long time and never had any problem with them.

10-18-2010, 05:28 PM	#19
mzperx New Member Join Date: Oct 2010 Posts: 4	Re: Fortron FSP-ATX-400PNF I have 2 of these PSU laying around with bad caps. One of the 2 CAPs in the middle (Teapo 1000uF 10V) are dead on both. I wonder if it originates from the capacitor quality or maybe the motherboard what it worked with killed it.. (I found these) I would change them, but I have only 1 such capacitor in my inventory but that has greated diameter, or I have some (a lot) nichicon 1000uF 6.3V caps.. oh and a Jee 1000uF 16V. Jee is low quality as I read, but maybe it is oversized enough not to die? Also would it be enough to change 1 cap on both, or both caps since they are identical, and I guess the other can fail as well?

10-18-2010, 06:03 PM	#20
shovenose 404 Not Found Join Date: Aug 2010 City & State: Fairfax, California My Country: USA Line Voltage: 120VAC 60Hz I'm a: Forum Junkie Posts: 3,548	Re: Fortron FSP-ATX-400PNF fsp is a decent psu oem, but the love crap caps! __________________ Firefox is named after a fox - WRONG! That orange thing is a Red Panda, not a fox!! http://www.youtube.com/watch?v=y6GaPkkGZGw PSU Pr0n http://www.psudatabase.com/

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