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QUICK TIP: Testing and adjusting the voltage on a compact Macintosh 

Branchus Creations
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Brought to you by Kaiweets
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The Macintosh 128K, Macintosh 512K, Macintosh Plus, Macintosh Classic and Macintosh Classic II all have an adjustable power supply. This video explains how to test the voltage output of these Macs, as well as how to make minor adjustments.
Purchase the Kaiweets KM601 Digital Multimeter:
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#RetroComputing #MacPlus #Macintosh #VintageMacintosh
Capacitor replacement guides:
recapamac.com.au/
If you enjoy the content and would like to make a small donation, you can do so here:
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Tools/Products used (paid links):
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31 дек 2021

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Комментарии : 13   
@GarthBeagle
@GarthBeagle 2 года назад
8:03 "... lots of nasty zappy dangers in there" ⚡️
@jimboblivesforever
@jimboblivesforever 2 года назад
While this is basically a multimeter commercial, It's still very informative, and I do enjoy your edited short-form videos a lot. Thumbs up!
@threethousandyen
@threethousandyen 2 года назад
Great info for beginners to check a common failure point! You do a good job of underscoring how dangerous this can be, especially with the Classic. I think since this is aimed at people who might not know what they’re doing it’d be best to say to ONLY use insulated or nylon tools for these adjustments. Especially with the Classic, it’s easy enough to slip if you’re nervous. I see you 3D printed a plastic handle, but most viewers won’t have that. There are reasonably priced insulated drivers on Amazon. I wish there were longer nylon TV adjustment tools but haven’t come across them. Cheers!
@RudysRetroIntel
@RudysRetroIntel 2 года назад
Excellent video and explanation!
@JeremyBolanos
@JeremyBolanos 2 года назад
Very informative!
@DavidStahlOLDHAPPyMACs
@DavidStahlOLDHAPPyMACs 2 года назад
Great Tip Bruce good info
@TheHouseOfMoth
@TheHouseOfMoth 2 года назад
Good stuff!
@aa-au
@aa-au 2 года назад
Great video Bruce. I want more!
@dido1803
@dido1803 2 года назад
Hi there. I really enjoyed seeing this video and learned a lot. A question regarding to adjusting V, is there a symbol that I should look for to know what component that is for adjusting V?
@Scarlet_1971_cuda
@Scarlet_1971_cuda 2 года назад
You cover the +12v acceptable voltage levels but not how to adjust the +12v rail. I assume that only the +5v rail is adjustable. Is this accurate?
@BranchusCreations
@BranchusCreations 2 года назад
Check out the caveats I mention at 02:35. The adjustment will affect *both* the +5 and +12V rails. If you get the +5V correct but +12V is outside of acceptable range, you have issues that are beyond an adjustment.
@kmichielsen
@kmichielsen Год назад
@@BranchusCreations I have a Mac Plus that is giving me the Jail Bars and no chime, I tried troubleshooting the RAM/ROM but I don't have any known good units to test with. I did check the voltage and I was almost getting 5V but im only get 3V on pin 8. What would be my next best course of action? Is this an analog board issue? Thanks in advance for any advice
@kenvanmersbergen4860
@kenvanmersbergen4860 2 года назад
Where can we get that 3d printed extender?
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