NeXT Computer / NeXTCube Capacitor Lists

[Elemenoh]

I'm in the process of recapping a couple of NeXTCubes and was a little surprised it's kind of hard to find good cap info. So here's an attempt. The MLB/PSU info here is based on an early serial NeXT Computer. So your milage may vary if there are other revisions of these boards. The Magneto Optical drive cap info is based on a thread from NeXTComputers.org.

Note the MO drive cap sizes are very small through-hole caps. Be careful when ordering. I had to source from both DigiKey and Mouser to get the right sizes.

Main Logic Board​

Quantity	Type	Capacitance (uF)	Voltage Rating	Size	Lead Spacing (est.)
6	SMD	47	16	C	N/A
4	Through Hole	220	25	10x12	5

Power Supply​

Quantity	Location(s)	Type	Capacitance	Voltage Rating	Size (mm D x H)	Lead Spacing (est.)
2	C122, C123	Through Hole	780	400	40x52	10mm LI type 2 — 1.2x6 mm
2	C124, C125	Through Hole	10	250	22x40	11
1	C209	Through Hole	8,200	16	18x40	8
1	C210	Through Hole	2,200	16	16x20	8
1	C211	Through Hole	3,900	16	16x30	8
1	C212	Through Hole	1,500	16	12.5x24	5
2	C213, C214	Through Hole	15,000	6.3	18x40	8
1	C215	Through Hole	10,000	6.3	16x40	8
1	C216	Through Hole	220	25	8x13	5
2	C217, C223	Through Hole	100	25	6.5x13	5
2	C174, C218	Through Hole	1	100	6.5x13	5
1	C220	Through Hole	47	25	5x13	5
2	C173, C221	Through Hole	0.47	100	5x5x13	5
2	C178, C179	Through Hole	10	63	5.5x13	5

Magneto Optical (MO) Drive​

Quantity	Location(s)	Type	Capacitance	Voltage Rating	Size (mm D x H)	Lead Spacing (est.)
9	Analog C221/C266/C269 (3) Digital C421/C433/C447/C448/C477 (5) Motor C9 Rev B (1)	Through Hole	10	16	4x6	1.5
1	Hidden cap behind eject motor	Through Hole	10	25	4x6	1.5
5	Motor C4/C5/C6/C7/C8 — 50V covers both Rev A and Rev B	Through Hole	10	50	5x6	2
5	Analog C281/C244 (2) Motor C2 Rev B (1) OR Motor C1/C2/C30 Rev A (3)	Through Hole	1	50	4x6	1.5
1	Motor C3	Through Hole	2.2	50	4x6	1.5
2	Analog C306/C369 — must be polarized	Through Hole	3.3	50	5x6	2
2	Motor C31/C32 — Rev A only; skip if Rev B	Through Hole	22	10	5x6	2
2	Analog C364/C365	Through Hole	22	16	5x6	2
7	Analog C277/C279/C303/C352/C353/C354/C355	Through Hole	47	16	6.3x6	2.5
1	Motor C11 — blue body, not electrolytic	Through Hole	10	16	N/A

 

[AlexMac]

At least for the NeXT Stations I have seen almost no leaky caps. Only one Station Turbo showed some and I recapped them. Usually it is enough to replace the 47 / 16 Caps AFAIK. Having plenty of those handy is anyways advised

 

[JdM74]

Hey @Elemenoh! This is a great cap compilation [especially for the PSU]. One question, which of the Cube PSU's does this list refer to? There were a few of them used. The older of them was used in original 030 Cubes, while older '030's and '040' used another. The PSU's model number [thankfully] is on the tag. It'll either be 151 or 953. Thank you for posting this....and if it's for the 953, you've saved me a bunch of time!

 

[Elemenoh]

I'll check and add the model info. The PSU I built this list from is from an early serial 030 'NeXT Computer'.

 

[Paolo B]

The best source is definitely the book “Inside NeXT - A guide to the Black Hardware“, where you can find a list of capacitors for each item.
Concerning the MO Drive, I have refurbished a few units, with fair rate of success (5/6). I did the last two units a few years ago using surface mounted components instead of through hole. Tricky, but doable and the result is very neat. They still work flawlessly.

 

[Elemenoh]

@Paolo B Are those online somewhere too That's cool they're in the book, but nice to have something findable online.

 

[Paolo B]

I warmly recommend the book, it’s indeed a must have for any NeXT lover.

 

[AlexMac]

Just recapped a Turbo Board (at least the 47/16v parts)

 

[ScutBoy]

Too bad that book is sold out.