Chieftec HPC-360-202 PSU

[JEWilson]

Hi

Have tested it with two types of PSU tester (FWIW).

The first PSU tester does not report any problems.
The second, however, beeps an flashes a problem with +5VSB, that is the
PSU tested has an LCD display and details voltage rail readouts.

What are the views of forum members - are these any good?

Thanks

[willawake]

Re: Chieftec HPC-360-202 PSU

a new one should be ok for 3 years or so then if its anything like the 3 i have here will bulge the cap shown in the first link and develop a significant buzzing sound which remains after replacement of that bad cap. The ones i have do not have LCD though.

https://www.badcaps.net/forum/showthread.php?t=2237
https://www.badcaps.net/forum/showthread.php?t=1153

They are made by http://www.highpowersupply.com/ and i guess similar to fortron.

[JEWilson]

Re: Chieftec HPC-360-202 PSU

Sorry bout the misunderstanding. My mistake.

I have two new PSU testers, the new(est) has an LCD readout

The PSU I rec'd and treated as being in an unknown condition.
No LCD readout on the psu - might be a good sales gimmick
all the same erm... or is that finely engineered diagonstic
PSU features!

Seems you have done most of the work on this PSU type already
per the thread in prior post - thanks.

I will do a phy. inspection and post a BOM here for the electrolytics
in the primary, inverter and filter - at least then anybody else can
use it for reference.

Of course, in production suffice it to say, from run to run the
BOM will very likely change and more likely still, go down in
quality terms in the pursuit of profit as well as due to supply
chain fluctuations.

May be of some help even so.

Seems I require to get myself an ESR meter as well.

I usually use panasonic FM for mobo regaultor recaps.
Are FCs for PSUs a good choice?

Any help, insight and advice greately appreaciated - thanks

[JEWilson]

Re: Chieftec HPC-360-202 PSU

Just another question

The fan. I did wonder as to why it was so quiet.

Whatch'er reckon? Replace it or leave it?

[willawake]

Re: Chieftec HPC-360-202 PSU

FCs are good for this but maybe you have probs with diameter if you are buying from RS etc.

fan is adequate, can replace if you prefer not so hot. cant remember if fan is getting 12v from this psu. if not then connect directly to 12v. much noise though with some types of fans running on 12v. I replaced fan on one of these units with stronger one and get same capacitor failure as other 2, go figure.

esr meter is very useful
capacitance meter could be useful also
multimeter and some good load on the psu better than your psu tester method

[JEWilson]

Re: Chieftec HPC-360-202 PSU

Have a Fluke 175 for cap testing - don't think this does ESR though.
I have seen a kit - design by a Bob Cater, kit supplied by Dick Smith
Electronics or EVB (as pic'd in your thread). Is this a good option?
These seem cheaper in the US than Canada or the UK taking
a quick peek at a eBay that is.

As to loads, I have thought about constructing a dummy load
but if this is too much hassle might just buy one instead and
save hassle over the long term.

Any of the forum members views on construcing a decent
dummy load?

I've opened up the unit and do not immediately see any cap
distress - paid particular attention to the cap as you have
detailed in your own diagnosis. The unit is very clean inside.

I do recall I had some FCs spare. The dia is fine. Certainly have 16v 1000uF

Also, my PSU has the primary sub pcb toasted a
good deal more than your pics and still does not have any
insulation. It is heated to the extent you can see the glass
fibre substrate on the board - me thinks bad!!

Is this a problem? I took a good look at the two main primary
electrolytics and though for a moment one was beginning to go bad
as it has a slight bulge but this may be just the plastic cover.

On the sub pcb there are 2 Teapo 2.2uF 400V with cans
as H 10mm dia 7/8 mm - these appear to be fine.

The heating is from the two power resistors on the sub
pcb being too close to the substrate, possibly a production
construction error and reflects the relatively poor cooling
I observered with the fan. See further (bad) pic attached.

Of course, if any of the caps have gone dry and exhibit
poor ESR - its : err... take your pick unless I just replace
the lot!

As the PSU testers indicated a possible +5VSB standby
issue, might the problem be aging and drift? I see from the
+5VSB section, there is a trimmer pot VR1, cap C37 and beside
it a power res and beside that, a coil L10 just behind the C36 you
replaced.

The fan is connected to CN2 and has, what I believe to be an
FCA connector for a mobo header.

The phase corrector on this PSU has insulation in the correct palce.

So... next steps? Suggestions please

[JEWilson]

Re: Chieftec HPC-360-202 PSU

Sorry

Forgot the pic - see attached

As it appears these have problems with +5V and +5VSB due to
bonding the O/P cap to the load resistor, start my search there
by replacing cap - C37

BTW, BOM as best as I can figure below

Electrolytics Only

In the primary;

2 of Black 680 uF 200 V Teapo 85 deg C - H 45 mm x Dia 20 mm
2 of Brown 2.2 uF 400 V Teapo 105 deg C - H 10 mm x Dia 8 mm

In the switcher;

1 of Black 1000 uF 16 V Jenpo 105 deg C - H 20 mm x Dia 10 mm is C36
1 of Black 22 uF 50 V Jenpo 105 deg C - H 8 mm x Dia 3 mm
1 of Black uF V deg C - H 8 mm x Dia 5 mm
2 of Brown uF V deg C - H 8 mm x Dia 3 mm

In the PFC phase correcter;

1 of Black 10 uF 50 V Jenpo 105 deg C - H 8 mm x Dia 3 mm

In the output filter;

1 of Black 0.47 uF 50 V Jenpo 105 deg C - H 8 mm x Dia 3 mm
2 of Black 1 uF 50 V Jenpo 105 deg C - H 8 mm x Dia 3 mm
2 of Black 3300 uF 6.3 V Jenpo 105 deg C - H 25.4 mm x Dia 10 mm
1 of Green 3300 uF 10 V 105 deg C - H 30 mm x Dia 10 mm
1 of Black 2200 uF 16 V Jenpo 105 deg C - H 25.4 mm x Dia 10 mm
3 of Black 10 uF 50 V Jenpo 105 deg C - H 8 mm x Dia 3 mm
2 of Black 470 uF 16 V Jenpo 105 deg C - H 15 mm x Dia 8 mm 1 is C37

The rest as far as can I determine, are bead type caps

[JEWilson]

Re: Chieftec HPC-360-202 PSU

Sorry...

I see Teapo are found in the bad caps list.
What's the story for Jenpo? Are these any good?

Thanks for any advice, insight and help

[jvschie]

Re: Chieftec HPC-360-202 PSU

For whom this might help:

I repaired one of this unit today. It didn't have 5VSB.
At first instance it appeared that only FET Q10 died, but after further analysis I saw that under C36 (1000uF/25V KMG brand) the PCB was black and that D14 (zener 6v3) was broken.
After I replaced Q10, C36 and C37 (470uF/16V TEAPO brand) (just in case), the 5VSB seemed to work again, but the tension was too high and there was noise on it. This was caused by a dried-out C34 (22uF/50V JENPO brand) on the primary side. After replacing it, the 5VSB became OK. After replacing D1 the job was done.

The end conclusion is that probably a bad C34 from JENPO was the cause of the problem.

[linuxguru]

Re: Chieftec HPC-360-202 PSU

In some of these topologies, the small primary side 22uF/50V cap on the auxiliary flyback can be upgraded safely to a higher quality 47 or 100uF cap with improved durability. I have found the 100uF/35V NCC LXA to be a good replacement, but there are numerous other choices.

[severach]

Re: Chieftec HPC-360-202 PSU

Most of the beep codes in the LCD tester are obvious. There is one that is not obvious and I think it's when Power Good shows less than 270ms.

[JEWilson]

Re: Chieftec HPC-360-202 PSU

Hi

I have recently recapped this PSU as with;

+5VSB Rail
1 of 470uF 16.0V 105 deg - done, replaced with Panasonic FC

+5V Rail
2 of 3300uF 10.0V 105 deg - done, replaced with Panasonic FC

+3.3 Rail
2 of 3300uF 6.3V 105 deg - done, replaced with Panasonic FC

+12V Rail
1 of 2200uF 12.0V 105 deg - done, replaced with Panasonic FC

Powered up
Tested with PSU Tester2 (the one with LCD readout) - go/no-go test.
Found +5VSB voltage sits at 5.8V, above upper regulation threshold of 5.25

Tester 2 readouts;
+12.0V1 : 12.1 V ATX 20 pin ok
+12.0V2 : 12.1 V ATX 4 pin ok
+ 5.0V : 5.2 V ok
+ 3.3V : 3.4 V ok
- 5.0V : Unknown
-12.0V : 11.7 V ok
+ 5.0V SB : 5.8 V - out of regulation
PG : 330 mS

Appears C34 in this PSU like jvschie found has gone, my ESR meter reads 62 ohms.
All the same the +5VSB has not gone entirely as can be seen but is
out of regulation.

As linuxguru states, I will replace this cap with something more reliable.
I have in mind a 100uF 35V Panasonic FC albiet the can is a bit
on the large size, that is, 8.0 mm dia, 11.5mm len, 3.5mm lead pitch.

Will check out the semiconductors also