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	Capcitance (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

MegaPixel Display Analog Board N4000 (Revision: 1-623-855-12)​

Note: adapted from asterontech.com and not yet verified on my display.

Quantity	Location(s)	Type	Capacitance	Voltage Rating	Size (mm D xH)	Lead Spacing (est.)
1	C33	Through Hole	1,200	35	12.5x31	5
2	C43, C80	Through Hole	1	100	5x11	2
1	C56	Through Hole	1	160	6.3x11	2.5
1	C68	Through Hole	100	35	8x11	3.5
1	C5	Through Hole	100	100	10x20	5
1	C48	Through Hole	100	50	8x11	3.5
3	C7, C8, C34	Through Hole	1,000	35	12.5x25	5
1	C24	Through Hole	330	6.3	6.3x11	2.5
5	C3, C6, C14, C15, C36	Through Hole	330	35	12.5x15	5
5	C2, C11, C17, C37, C62	Through Hole	22	100	6.3x11	2.5
6	C1, C31, C35, C44, C70, C202	Through Hole	22	50	5x11	2
1	C99	Through Hole	47	50	6.3x11	2.5
1	C69	Through Hole (Bi-Polar)	22	25	6.3x11	2.5

​

MegaPixel Display Analog Board N4000A (Rev: 1-623-855-16 A)​

Note: adapted from asterontech.com and not yet verified on my display.

Quantity	Location(s)	Type	Capacitance	Voltage Rating	Size (mm D x H)	Lead Spacing (est.)
1	C33	Through Hole	1,200	35	12.5x31.5	5
2	C43, C80	Through Hole	1	100	5x11	2
1	C56	Through Hole	1	160	6.3x11	2.5
1	C68	Through Hole	100	35	8x11	3.5
1	C5	Through Hole	100	100	10x20	5
1	C48	Through Hole	100	50	8x11	3.5
3	C7, C8, C34	Through Hole	1,000	35	12.5x25	5
1	C24	Through Hole	330	6.3	6.3x11	2.5
5	C3, C6, C14, C15, C36	Through Hole	330	35	12.5x15	5
5	C2, C11, C17, C37, C62	Through Hole	22	100	6.3x11	2.5
6	C1, C31, C35, C44, C70, C202	Through Hole	22	50	5x11	2
1	C99	Through Hole	47	50	6.3x11	2.5
1	C69	Through Hole (Bi-Polar)	22	25	6.3x11	2.5

MegaPixel Display Sound Board N4000 (Rev.: 1-623-854-12)​

Note: adapted from asterontech.com and not yet verified on my display.

Quantity	Location(s)	Type	Capacitance	Voltage Rating	Size (mm D x H)	Lead Spacing (est.)
2	C140, C141	Through Hole	470	16	11x15	TBD
2	C144, C145	Through Hole	1,000	16	10x20	5
2	C212, C262	Through Hole	220	25	8x11.5	3.5
2	C220, C270	Through Hole	22	50	5x11	2
9	C143, C146, C203, C219, C221, C253, C256, C269, C271	Through Hole	10	50	5x11	2
1	C136	Through Hole	47	16	5x11	2
1	C135	Through Hole	100	16	7x11	TBD
10	C125, C126, C130, C131, C149, C150, C151, C152, C209, C259	Through Hole	22	16	5x11	2

MegaPixel Display Sound Board N4000A (Rev.: All)​

Note: adapted from asterontech.com and not yet verified on my display.

Quantity	Location(s)	Type	Capacitance	Voltage Rating	Size (mm D x H)	Lead Spacing (est.)
12	Unmarked	SMD	47	16	B (for tant) or 1206 (ceramic)	N/A
1	Unmarked	Through Hole	1,500	16	10x20	5

 

[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.

 

[Paolo B]

Too bad that book is sold out.

https://ebay.us/m/lPeqeo

 

[ScutBoy]

https://ebay.us/m/lPeqeo

Thanks for the pointer!

 

[Elemenoh]

I looked through my copy of the book (which I adore). It doesn't have a cap list for the Cube at all. The NeXTStation lists do not include power supplies. But most importantly the first page of the repair section says

The author of this book, who has simply collected this documentation from the web, is in no way responsible for any damage caused to the machine when attempting to repair it, or for any personal injury caused by inexperience or negligence in the execution of the procedures described below.

So while it's a very nicely laid out resource, it's just a collection of info found online, is not itself searchable, and the book is out of print. It's not an ideal or complete source for someone looking to recap their NeXT stuff IMO.

Update: the book references this as the source for most of its cap lists: http://www.asterontech.com/Asterontech/Welcome.html and the MO caps are credited to https://www.nextcomputers.org/NeXTfiles/Docs/Hardware/NeXT_Magnetptical_Service_Manual.pdf but that link is 404

 

[Elemenoh]

I've added lists for the Mega Pixel display (Analog board + Sound board) based on the lists at asterontech.com. I'll update if I find any discrepancies when I open my displays up.