In search of list of capcaitors for Delta SMP-220DB PSU (Apple P/N 614-0012)

[aperezbios]

I'm looking for a list of capacitors/sizes/values for the Delta SMP-220DB PSU,as used in the PowerMac 8100/80 and Quadra 800/840AV. If anyone has created one, if you'd be so kind as to share it, that would be greatly appreciated. My 26-year-old PowerMac 8100/80 thanks you in advance

 

[croissantking]

I'm looking for a list of capacitors/sizes/values for the Delta SMP-220DB PSU,as used in the PowerMac 8100/80 and Quadra 800/840AV. If anyone has created one, if you'd be so kind as to share it, that would be greatly appreciated. My 26-year-old PowerMac 8100/80 thanks you in advance

Did you ever attempt a recap?

 

[croissantking]

I'm currently refurbishing one of these PSUs. I've dismantled it into its 5 boards, 4 of which have electrolytic caps. All are rated at 105ºC apart from the largest C1 + C2 which are 85ºC.

Here's a list, @aperezbios I'm guessing that you've moved on from this long ago, but it will help others.

SMP-220DP-1 (largest board that the other boards fit into)

Capacitor	Value	Size in mm (length x dia)
C104, C105	3300μF 10V	36x13
C106	2200μF 10V	28x13
C107	1000μF 10V	20x10
C154, C156	1000μF 16V	28x10
C252, C807	470μF 35V	20x10
C253	22μF 16V	15x18
C513	10μF 50V	11x5

SMP-220DP (has the two largest caps)

Capacitor	Value	Size in mm (length x dia)
C1, C2	820μF 200V	40x30
C301	470μF 35V	20x10
C302	0.47μF 50V	11x5
C304	4.7μF 50V	11x5
C952	1μF 50V	11x5

DC-267

Capacitor	Value	Size in mm (length x dia)
C507	2.2μF 50V	11x5
C511	22μF 50V	11x5
C532, C601	10μF 50V	11x5
C655, C674	4.7μF 50V	11x5
C783	1μF 50V	11x5
C784	100μF 25V	11x7

DC-230 (smallest board)

Capacitor	Value	Size in mm (length x dia)
C804	2.2μF 50V	11x5

 

[3lectr1cPPC]

I'll add this list to macdat to make it more accessible to others in the future

 

[croissantking]

Sounds good!

 

[croissantking]

Here is a link to a Mouser cart for these caps:

https://www.mouser.com/ProjectManager/ProjectDetail.aspx?AccessID=99d45f475f

The only ones missing are the big caps C1+C2. That's because there are no modern equivalents available, that I can see. I hope it will be OK to leave them in – on a couple of guides I've read/watched regarding PSU recapping, I am told that the very largest caps don't go bad or really need replacing.

I am going to place an order for these and hopefully resuscitate my dead supply.

 

[KGLlewellyn]

I've got a dead one of these too, I'm interested to see if the recap works out for yours! Best of luck with it and thank you for providing a parts list!

 

[croissantking]

I did the recap today and was unsuccessful in reviving my PSU. It's still failing in the same way as before, it clicks on and then off again. I'm glad I tried but I will go the ATX route, retaining the casing and fan and just changing the internals.

I made one error in the parts list above. C253 should be 220uF 16V, not 22uF. I have corrected the Mouser BOM as well.

 

[croissantking]

Hmm, I am considering having another look at the old PSU. I was thinking of checking components for shorts. I need a sense check here, is it worth trying?

 

[croissantking]

I found 820uF caps for C1 and C2 on Mouser and updated the BOM (not sure what was going through my head when I looked last and couldn't see any, there are loads).

I am currently feeling motivated to check every single last component across the five boards that make up the PSU

 

[croissantking]

I come back to poke at this PSU from time to time. This week, I replaced the large bulk capacitors which I’d omitted last time round.



This didn’t make any difference. I get a solid +5VSB, but as far as I can tell, the undervoltage protection circuit is being triggered when powered on.

 

[Franklinstein]

I had a 9600 power supply (also a Delta unit) that blew an IC after an inrush current killed it. I'm pretty sure it was in a TO-220 package so it looked like a MOSFET or Schottky diode but it was some sort of VRM or other power control IC. It had failed but it wasn't obvious (the fuse was OK after replacing it, nothing was visibly damaged; it just wouldn't turn on) and without datasheets or schematics it took me a while of probing before I figured it out. Apparently I made a thread about it but never updated it with the resolution. I can't remember the specs of the device offhand or I would.

Anyway, check the silicon bits including looking up part numbers on them to figure out what they are so you can test them effectively. One of them may be an IC that has failed.