Hello NeXT Community:
I have an old friend that worked for years troubleshooting motherboards so I'm going to have him recap NeXT boards for me.
I know there are a few threads on Capacitor replacement but was hoping for a list of recommended caps for NeXT Specific Hardware so we can point the community at the list :
I'm posting links to good threads here...
I know Trex , Brian Archer and Charles at MacCaps probably have the list in there heads amazing and anyone that can contribute and I'm making links so I can point folks at this thread as a kind of master list in progress that I'll edit!
So the idea is :
Recommended Caps and part numbers for both Electrolytic and Ceramic:
Part Numbers and recommended suppliers Mouser, Digikey US and International
Perhaps pros and cons of each: Do rom chip revs or on board configurations matter to correlate with Rom Chips?
NeXT Cube 68030 25Mhz boards
NeXT Cube 68040 25Mhz boards
NeXT Turbo Cube 68040 33Mhz Boards
NeXT Cube Optical Drive
NeXT Dimension NTSC Boards
NeXT Dimension PAL Boards
NeXT Cube Mod
http://www.nextcomputers.org/forums/index.php?topic=3220&highlight=optical+driveNeXTSTATION Mono 68040 25Mhz Boards
NeXTSTATION Mono Turbo 68040 33Mhz Boards
NeXTSTATION Color 68040 25Mhz Boards
http://www.nextcomputers.org/forums/index.php?topic=3940&highlight=monitor******
NeXTSTATION Turbo Color 68040 33Mhz Boards
Surface mount capacitors (Qty. 8 for Turbo Color Slab): 47μF 16V Panasonic FP series (Panasonic EEE-FP1C470AP, DigiKey PCE4530CT-ND). The absolute best choice here would be polymer capacitors, but they are several times the price and probably completely unnecessary. They may also destabilize the power supply due to their extremely low impedance.
Through hole capacitors (Qty. 3 for Turbo Color Slab): 220μF 35V Panasonic FC series (Panasonic EEU-FC1V221, DigiKey P10297-ND). These are high temperature 3000 Hr low impedance capacitors (that's 3000 hour estimated life at 105°C. I selected 35V rated capacitors as they have the same can size as the originals, longer life and higher ripple current. The Panasonic FM series and Nichicon PW series are also an excellent alternative. Look for 5mm lead spacing to fit the motherboard holes.
For flux I recommend Kester 186 or equivalent, since it is mild enough to be left on after the solder process and it will not cause any damage or corrosion to the components or to the board.
Trexy Turbo Color Doc
https://www.dropbox.com/s/fiwxr8ejsx1loxw/NEXTSTATION%20Turbo%20Color%20Capacitor%20Replacement%20-%20NC.pdf*****
NeXT CDRom Drive
http://www.asterontech.com/Asterontech/next_cdrom_refurb.html Brian
Archer
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NeXT ADB Soundbox board
http://www.nextcomputers.org/forums/index.php?topic=3428&highlight=adb+non+adb Conversion with instructions Brian
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NeXT Non ADB Soundbox Board
NeXT Sony 4000 Monitor
http://www.asterontech.com/Asterontech/NeXT_MegaPixel_Restore.html****
NeXT Sony 4000A Monitor
http://www.asterontech.com/Asterontech/NeXT_MegaPixel_Restore.html****
NeXT Flatpanel mod 17"
http://www.nextcomputers.org/forums/index.php?topic=3533&highlight=flat+panel+mod****
NeXT Phillips 17" Monitor
http://www.nextcomputers.org/forums/index.php?topic=3936&highlight=monitor Brooklyn
NeXT Sony 17" Trinitron Monitor
NeXT Hitachi 21" Monitor
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NeXT ADB Keyboards
http://www.nextcomputers.org/forums/index.php?topic=3418&highlight=next+adb+keyboard*****
Any other I've missed?
Thank your for your time as I know it will help a lot of folks refurbishing the NeXT equipment!
I posted a nextstation mono guide here:
http://www.asterontech.com/Asterontech/nextstation_mono_retore.htmIf anyone has a PN-1703.AB or PN-1703.AA board please send me a high res photo and I will include it.
I'm not sure if this is the right thread to post this in or not, but I guess it is related. Rob has been very kind and recommended a good man to recap my boards, however, he is in the U.S. and I'm in Europe and I have 40+ boards that need recapping and the logistics of shipping all this to the U.S. and back has been frightening me. Does anyone know someone good — and I emphasize good — in Europe who will do this, and do a good job? Also, other than motherboards and MO drive boards, how about power supply boards, sound box boards, the PCBs in keyboards(?), they presumably all will need recapping one day, the PSUs definitively. Has anyone had interesting experiences to report on this. And monitors?
For the logic boards, maybe try a cell phone repair shop in your area?
Hello Tomaz: I've hired a longtime friend that will be doing this as a side job that was the quality control guy for Celestica Motherboards for 6 years. He has already done some excellent work for me on ADB to Non ADB conversions and I'm going to set him up with some NeXT Motherboards already have the new Capacitors in hand. I've been using Charles at Mac Caps for years and he does a good job as well, Charles currently has a batch of Cube motherboards and I'm just patiently waiting for him to recap them as I have back orders to fill. It will make it easier for me to test the boards having a local recap rather than sending them out and using both as well as Brian when he has time helps . I understand the advantage of you going local as well. If you wanted me to do them locally and are not in a hurry I know Matt will do a good job . Let me see how everything goes with his first few motherboards as I say I'm impressed with his work so far. Brian does a great job as well , it is amazing how much interest we have with new NeXT hardware owners , it is a lot of fun for me !
I know people who can recap in Europe. Where are you located? Mac caps service is very expansive.
Quote from: "slomacuser"I know people who can recap in Europe. Where are you located? Mac caps service is very expansive.
There won't be anyone near where I am, so I will have to ship them, so any recommendation in Europe of someone who can do a good job would be welcome.
Should anyone be interested, I've just replaced all the capacitors in a MO drive (Motor Board, Analog Board, Digital Board) with solid state, surface mounted ceramic ones. Not the easiest job ever, but surely doable with some basic soldering skills.
In case, I can share the BOM for buying the whole set at Digikey.
Quote from: "paolo.bertolo"Should anyone be interested, I've just replaced all the capacitors in a MO drive (Motor Board, Analog Board, Digital Board) with solid state, surface mounted ceramic ones. Not the easiest job ever, but surely doable with some basic soldering skills.
In case, I can share the BOM for buying the whole set at Digikey.
Please share the BOM. I need to take this job on one way or another.
Here please find the complete list of capacitors (file is in Apple's "Numbers" format)
https://dl.dropboxusercontent.com/u/47587908/Canon%20Optical%20Drive%20-%20Motor%20Board%20Rev.%20B%20%20shared.numbersThe references highlighted in green are ceramic surface mounted, those in blue are regular pass through mounted electrolytic capacitors.
Soldering surface mounted in place of pass through requires that you prepare some kind of "bed" for both ends of each capacitor. Again, not easy, but doable.
Using solid state, high temp resistance ceramic capacitors should ensure a more robust and time proof solution (actually, the first recapped drive I've worked on has stopped working after just one year, with some of the electrolytic capacitors already showing strong degradation, I assume due to very high heat load).
Quote from: "paolo.bertolo"Here please find the complete list of capacitors (file is in Apple's "Numbers" format)
Thanks!
Can you tell us, please which tools do you use ?
Are you able to please share the file in a different format? My Numbers version is too old to be able to open that file.
Quote from: "oneNeXT"Can you tell us, please which tools do you use ?
Hello,
nothing special indeed, just a cheap soldering station bought on Amazon. Surely, you need to practice a bit and to be willing to spend some time on perfecting your skills. There are indeed many tutorials on youtube, they are a good starting point.
Desoldering and preparing the board for the new capacitors is probably the most difficult part, since there's some risk of damaging leading traces, but it's normally possible to recover the situation by using some hard wiring.
For example, in the attached picture of a motor board, you can see some inelegant hard wiring replacing a damaged trace. Not something that made me happy, but it just works.
https://dl.dropboxusercontent.com/u/47587908/IMG_2195.JPG
Quote from: paolo.bertolo on December 11, 2016, 02:37:33 PMShould anyone be interested, I've just replaced all the capacitors in a MO drive (Motor Board, Analog Board, Digital Board) with solid state, surface mounted ceramic ones. Not the easiest job ever, but surely doable with some basic soldering skills.
In case, I can share the BOM for buying the whole set at Digikey.
Sorry for resurrecting a very old thread, but all of the box links to the MO drive BOM are no longer functional. Can someone please post a current link?
Quote from: jshardin on October 23, 2023, 01:54:47 PMSorry for resurrecting a very old thread, but all of the box links to the MO drive BOM are no longer functional. Can someone please post a current link?
This is he document you seek :)
https://www.nextcomputers.org/NeXTfiles/Docs/Hardware/NeXT%20Magneto%20Optical%20Service%20Manual.pdf
Hello, i've an N4004 part 1974, who needed some caps replacement for audio noise, is the face plate is glued or is there some screw under the feet pads.
I'm looking some information before try to disassemble it.
Quote from: sappas on January 09, 2024, 05:52:52 PMHello, i've an N4004 part 1974, who needed some caps replacement for audio noise, is the face plate is glued or is there some screw under the feet pads.
I'm looking some information before try to disassemble it.
Yes under the 2 rubber feet closest to the face plate are 2 Phillip's head screws. They usually peel up easily from one corner, take your time as they have enough adhesive to reapply them when done. You will need to disconnect the speaker and microphone, take a picture before unplugging of the wiring so you can match it when reassembling :)
Hi There,
Does anyone have a capacitor list for the NeXT Cube 68040 25Mhz board?
Or a link to a pre-made cap kit on mouser/digikey or similar please?
@cooltr6 that's brilliant! Thank you :)
@ravepants You're most welcome!
One last thing....take the advice I was given when recapping logic boards....
"Take it slow and use plenty of flux."
The SMD caps might give a spot of bother, especially if there's been any leakage. A 350°C soldering iron with a smaller, precision tip will be your friend as well.
If you haven't purchased any flux as yet, be sure to add MG Chemicals 'No Clean' flux to your cart. Some of the best stuff out there.
Keeping good thoughts that your recap job goes smoothly. =)
@cooltr6 Many thanks again, and I will report back once I have completed the recap 👍
