06 October 2018, 02:19 | #21 |
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just cause i hate buying button cells batts and i take care of stuff so im not worried if they leak i have to watch regular caps anyways
so in the long run super caps i had already were my choice and im sure they wont be leaking anytime soon those varta batts came in both Ni-Cad and NIMH so im sure the Ni-Cads leaked way before i dont remember 100% but i think 1 is red and 1 is blue though i will say using the coincell and carrier does help hide a lot of the PCB damaged lol Last edited by nexus; 06 October 2018 at 02:27. |
06 October 2018, 02:28 | #22 |
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sadly SuperCars are leaking too. Good example is the cap in the original XBox.
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06 October 2018, 02:30 | #23 |
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or Dreamcast
many things used super caps as batts if i ever do anything different i would just do the AA batt deal and have it away from the boards i have massive rechargeble stash of batteries lol kids real purpose i even put anything there is to hide the PCB discoloring Last edited by nexus; 06 October 2018 at 02:36. |
06 October 2018, 03:21 | #24 |
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pulled the last few ICs before final distilled water rinse. oh the things we find. never touched this chip ever. i dont even know what it's for but apparently the amiga never needed that pin.
https://www.amazon.com/clouddrive/sh...tries*=0&mgh=1 https://www.amazon.com/clouddrive/sh...T5MBI7UfjnHbBA Last edited by nolunchman; 06 October 2018 at 03:34. |
06 October 2018, 04:44 | #25 | |
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if you ever have to bend those type of pins back do it slowly or they can crack and snap off on you Last edited by nexus; 06 October 2018 at 04:52. |
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06 October 2018, 08:59 | #26 |
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06 October 2018, 19:39 | #27 | |
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you know how many people have said that to me and end up getting busy in life and putting their amiga in a closet or garage,only to have it leak lol. A for the varta's yea nicad,nimh they all leak eventually. so why not just not use anything with leak potential,then u never have to worry about it ever again. |
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06 October 2018, 19:42 | #28 |
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06 October 2018, 19:43 | #29 | |
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the things people do to these poor machines.. lol |
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06 October 2018, 20:11 | #30 |
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yeah im always replacing caps so it just something im use to
nothing i have goes into the closet/ snake hole lol everything is out and ready to be used but you will never get around the capacitor plaque still going on today so watching or waiting for caps to fail is a daily thing in this house Last edited by nexus; 06 October 2018 at 20:20. |
06 October 2018, 20:36 | #31 |
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the small yellow capacitors on the motherboard...i dont have a cap meter, but some are reading open circuit and some have continuity. how do i know if it's bad/good
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06 October 2018, 21:54 | #32 |
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that isnt how you measure capacitors
and you dont measure them on the board i would fix everything else before worrying about the caps you have more serious issues also those are ceramic caps i doubt they are bad Last edited by nexus; 11 October 2018 at 19:54. |
11 October 2018, 17:59 | #33 |
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did some continuity checks on the FPU and discovered an open circuit on a corner pin close to the battery. go figure.
the aftermath: https://www.amazon.com/clouddrive/sh...RM0ZoobU4mVc1f Last edited by nolunchman; 12 October 2018 at 07:32. |
12 October 2018, 21:09 | #34 |
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12 October 2018, 21:25 | #35 |
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you might wanna buy a Andonstar microscope
they have decent cheap models thats $50 and under |
13 October 2018, 02:08 | #36 | |
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good work! |
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17 October 2018, 20:14 | #37 |
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thanks franchute
1 step forward and 2 steps back... i wan't feeling confident about jumpering the traces so i'm starting over. it may be better just to wire from the test points. won't look pretty but hopefully will have greater chance of success. i also desoldered the 40 pin socket closest to the battery for access (plus I burned it with the soldering iron when i was bridging the traces). |
17 October 2018, 20:46 | #38 |
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You can always leave the FPU alone for now. Jumper the mainboard not to use it and/or put in a 3630 and fix the essential stuff first.
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17 October 2018, 21:18 | #39 |
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just fyi the microscope will help you many ways besides seeing what you are doing
while soldering it allows you too inspect every inch of the board which you may need to do checking on solder joints traces etc etc this type of work you really should have 1 could save you hours in finding out what is wrong those i listed do many things like vid/snapshots/hdmi output/filters etc etc even measurements |
17 October 2018, 22:43 | #40 | |
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thanks nexus |
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