68kMLA Classic Interface

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IIGS Logic Board Capacitors (And list)

Posted by: Johnnya101 on 2017-03-10 15:18:17 Hi all, Noticed there were no lists for the caps for an IIGS... Since mine is all apart, might as well replace the caps!  Heres what Ive got: 16x (Might be 15, gotta check) 22uf 16v 2x 1uf 50v 2x 1000uf 16v Heres a cart from digikey that I put all these in. Can anyone tell me if these are good? http://www.digikey.com/short/32b2vf Comes to only $5.00!

Posted by: Themk on 2017-03-10 15:44:29 Were your IIgs caps leaking? It seems like the IIgs doesn't normally need new caps.

Posted by: Johnnya101 on 2017-03-10 16:06:34 No, no signs of leaking. Not on the LB. The Ab on the other hand was covered in a thick layer of dust and webs, and being how hot it gets near the CRT Im replacing them. But I mean I've got it apart. I plan on putting this on display next month and its going to be on for a few hours so I am thinking I should replace them all so nothing happens.

Posted by: Johnnya101 on 2017-03-10 17:18:19 Its got cracked flyback solder joints. Ive been having the monitor flicker randomly once in a while. Could these be the cause? How do I resolder them? Heat up the joint with my hot hair station and suck it up with a solder sucker, or heat it up with my soldering iron? And do you think replacing the logic board caps is needed? They appear to be fine...

Posted by: Themk on 2017-03-10 17:45:28 It seems like most IIgs don't have logic board capacitor problems. As the caps on the IIgs are through-hole, I would suggest using an iron with a sucker to desolder the caps. Cracked solder joints in the monitor could definitely lead to flicker. Also, just for curiosity, do you have a ROM1 or a ROM3 IIgs?

Posted by: Johnnya101 on 2017-03-10 18:10:56 ROM 1!!!  4MB ram and hopefully will be getting an scsi card soon so I can connect my 20SC... But yeah, Ill leave the caps then for now. I do have to solder in a battery holder... Will need help with that later. Same with the flyback right, just heat up solder with iron and suck with solder sucker? Sorry, never soldered before 😛

Posted by: Themk on 2017-03-10 18:31:33 Yes, heat up with iron, and suck it up with a sucker! I have the ROM3, not sure why I picked the ROM3 over the ROM1 but whatever! I'm too cheap to buy a SCSI card or any sort of mass storage device for my IIgs. My cheapo solution was to use an ImagerWriter cable to hook my SE running Appleshare 3 up to my GS, which actually works pretty good!

Posted by: Johnnya101 on 2017-03-10 18:35:55 Oh thats cool! Ill post a photo of the flyback joints. Its a wonder how it lasted so long...

Posted by: Johnnya101 on 2017-03-10 18:50:04 Here ya go! Sorry for lousy photos. All joints except one or two are like the ones with the crack ring.

Posted by: Themk on 2017-03-10 18:55:08 If you are comfortable, I would say re-do all of the flyback's joints. The joints don't look too bad though (from the photos at least).

Posted by: Johnnya101 on 2017-03-19 10:54:46 Done. Forgot to update. I've got a question for you. When using a small font size, does the text get hard to make out? I don't know if it's how it's supposed to be or not... how would I increase focus? The focus dial in the HV with a wooden stick?

Posted by: Themk on 2017-03-19 12:08:12 I've never had problems with legibility, but then again I use a flat panel display (with composite input) with my IIgs. If you feel like the monitor is out of focus, then adjust the focus pot. The IIgs' 640x200 video mode is a strange one though.

Posted by: Johnnya101 on 2017-03-19 12:37:27 Yeah that's what I've been thinking... because it's like a compact mac resolution stretched out sort of. Everything else is clear so I think that's jut how it is. Maybe the caps will help!

Posted by: Themk on 2017-03-19 15:05:34 The way GS/OS handles font stretching and shrinking I feel like could have been a little bit better. Make sure you have all the different font sizes installed, that can help a lot too.

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