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Medao

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I need some help with identifying some resistors on this Sun Electronics PSU MP-22160B (400-5443-01)
I will do a recap on it based on the listing I found on this forum already (thanks for this information!)
I will have to replace some resistors too and I will explain why.

I planed a fan change and recap on this PSU and after opening it I found the fan to be completely rusted and probably didn't turn for long time. I didn't use it and received like that already and my plan was to restore it first before installing it.

20230209_132451.jpg
20230209_134147.jpg




Here how the rusted fan looks like
20230210_004608.jpg


This seems to have generated a lot of heat in portion of the PSU where the PCB have some traces of heat
20230210_002429.jpg


And some components have heavily suffered from heat
20230209_173357.jpg
20230210_002335.jpg
 
I have removed most of the components from that PSU area and most of resistors have faded colors so I can hardly read their values and not sure if I can trust their measures as they could be altered with heat...
20230212_145341.jpg


List of those resistors :
- R58
- R59
- R33
- R30
- R41
- R24
- R44
- R34

If someone with the same PSU can check those values or read them if the colors are still OK That would be of great help as I can't find any diagram of this PSU and this is the only one I have and can't compare it with a second one.

Some of those resitors
20230211_155318.jpg
20230211_155446.jpg
 
I bet the resistors are fine though. Try measuring them and then compare with the bands.
 
I bet the resistors are fine though. Try measuring them and then compare with the bands.
Yes that's one of the solutions I have for now. I started referencing all those resistors with measured values and my own guess with the colors. Sometimes it works well and for some I have a wide difference range that's why I have doubt on the state of some resistors.

I will just put my list here and my guess/measured values and their pictures and will ask for your validation help.
 
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Here is the reference I found using two different measure tools for the color it's only a guess as some are really badly faded or probably darkened

Guess Color
ListPositionMeasure1Measure2
1​
2​
3​
4​
Color ValueLengthRadial
9​
R2439.5Ω39.6Ωorangewhiteblackgold39 Ω ±5%12mm5mm
7​
R3067.8Ω67.8Ωbluewhiteblackgold69 Ω ±5%12mm5mm
6​
R33145Ω145.4Ωbrowngreenbrowngold150 Ω ±5%12mm5mm
11​
R3447Ω46.9Ωyellowvioletblackgold47 Ω ±5%12mm5mm
8​
R41150.5Ω151Ωbrowngreenbrowngold150 Ω ±5%12mm5mm
10​
R4446Ω46Ωyellowvioletblackgold47 Ω ±5%12mm5mm
1​
R580.16Ω0.1Ωbrowngreysilvergold0.18 Ω ±5%16mm5mm
2​
R590.19Ω0.1Ωbrowngreysilvergold0.18 Ω ±5%16mm5mm

And all images of resistors
20230212_201034~2.jpg

20230212_201746~2.jpg

20230212_211009~2.jpg

20230212_211525~2.jpg

20230212_211924~2.jpg

20230212_212220~2.jpg

20230212_212437~2.jpg

20230212_212646~2.jpg
 
Replaced all resistors with values I listed above and those 3 caps replaced too for now will do the rest of caps tomorrow. Replaced the fan with a Noctua and it seems to be working fine 😁
Didn't adjust voltage yet will do it tomorrow I need some sleep for now...
20230217_003328.jpg

20230217_003400.jpg
20230217_003417.jpg
 
Last edited:
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