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OffTopic-Dell Optiplex SFF H235P PSU Cap Kit List

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ColinD View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote ColinD Quote  Post ReplyReply Direct Link To This Post Topic: OffTopic-Dell Optiplex SFF H235P PSU Cap Kit List
    Posted: 24 May 2018 at 5:59pm
Cap Kit List below....This is a common failure, but could not find the Cap Kit list online so this is based on a tear down.

PC plays up or won't boot up sometimes with a orange power light or continuously looping attempting to power up.

Fitted in Dell Optiplex SFF (Small Form Factor Case) Models - 760 , 780, 960 and 980. (Possibly others too)

Psu is marked H235P-00 and is 235W (watts), apparently it's also known under a number of different names but clearly I can't guarantee that these will use the same values or are actually correct. 

Supposed alternative Models are PW116 , R224M , RM117 , 0RM117 , CN-0RM117 , R224M , FR610 , H255T , H235P , RM112 , WU136 , PW116 , G185T.

Replace with Good Quality Long Life 105'C Rated Low ESR Capacitors such as Panasonic FR and FK.

Some caps seemed ok, but I replaced all of them to be sure, the bulged ones clearly tested faulty while some such as the 4700uF and the 150uF seemed to be in reasonable condition with their age taken into consideration.  These PSU's are small and quite tightly packed so may run quite hot.

Capacitor Kit List. (12 Capacitors) ALL 105'C

4700 uF, 6.3v, D13mm,  x 1  
2200 uF, 16V, D10mm, x 1 (or x3 if upgrading the 10V ones below)
2200 uf, 10V, D10mm, x 2 (see above) - Bulged
1500 uF, 10V, D10 , x 2 - Bulged
680 uF, 16V , D8mm, x 1 - Bulged
150uF,  420V, D18.5mm, x 1 - Most Probably OK
100uF, 50V, D8mm, x1 
47uF, 25V, 5mm, x1
22uF, 50V, 5mm, x1
10uf, 50V, 5mm, x1

Voltage can be upgraded if required (and probably capacitance a little if you can't find the exact value) but make sure the diameter stays close or they might not fit (height should not be a major issue).

Warning - Ensure the Primary PSU Cap (the 150uF  420V one) is discharged before working on the thing.

Hope this helps save someones PC from the scrapheap and get another few years out of it.

Cheers, Col



Edited by ColinD - 24 May 2018 at 6:48pm
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Post Options Post Options   Thanks (0) Thanks(0)   Quote tronads Quote  Post ReplyReply Direct Link To This Post Posted: 26 May 2018 at 8:51am
Thanks Colin, this may help me on one of my Groovymame setups I am having odd booting issues with at the moment.
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