• Updated 2023-07-12: Hello, Guest! Welcome back, and be sure to check out this follow-up post about our outage a week or so ago.

Search results

  1. J

    IIGS Power Supply Burned Trace

    Oh gotcha! Now that I re-read it that makes more sense that you're doing it. That's very helpful - I removed most of the diodes on that side to test and thanks to my manhandling I can tell which ones haven't been tested out of circuit - so I'll probably do that as well as look up every...
  2. J

    IIGS Power Supply Burned Trace

    OMG Thank you!!! I actually DID reverse 2 of them D'oh! Once I get the fuse holder and fuses tomorrow I can put those back and try again. Do you have a link to those schematics? All the links I've come across are dead and the one FTP server I found with a ton of them don't have the Dynacomp
  3. J

    IIGS Power Supply Burned Trace

    I tested every diode with the multimeter in circuit and anything that looked weird I removed and they tested fine (about 4-5 didn't test well in-circuit but tested fine out of circuit)...I know in-circuit isn't the best but it usually seems that anything wildly out of spec will show up. I...
  4. J

    IIGS Power Supply Burned Trace

    I cross-referenced with Mac84's recapping guide and they are installed correctly. I've never really dealt with transformers before since most of the time they just work :ROFLMAO:. What's the proper way to test resistance on it? My Dynacomp is LR62786 or Apple 699-0126 I was thinking about...
  5. J

    IIGS Power Supply Burned Trace

    It's on the way to the transformer actually. It looks like mains voltage going to the transformer. My finger in this pic shows where it comes in and then after that is where it burned before going into the resistor to the left (90ohm-ish, tested fine, burned trace stops before hitting...
  6. J

    IIGS Power Supply Burned Trace

    Hey all, I'm working on recapping a IIGS power supply - Dynacomp - that had pretty much no voltage output. I replaced all the caps on the low voltage side, but at this point though I did not replace the filter caps since they weren't Rifas and looked ok, and I did not have the 100uF main caps...
  7. J

    Mac IIfx - No Video - Need to identify C29

    It's possible that my LCD doesn't like the Tobey card, although I still couldn't get video on a known working High Resolution card so I think that still points to the IIfx for now.   I decided to take the power supply apart and it was so caked in dust that wouldn't wipe off and dead bugs that I...
  8. J

    Mac IIfx - No Video - Need to identify C29

    It's an LCD.  This model of Samsung is surprisingly compatible with a lot of things.  It seems to sync down to 15khz as I got an Atari 1040st to display on it I'm less likely to blame the LCD, granted not perfect but it did work...The adapter in 640x480 works on my IIcx (until I accidentally...
  9. J

    Mac IIfx - No Video - Need to identify C29

    I just got a Mac IIfx (a dream machine ever since I used one in a middle school journalism class...the fx was the teacher's computer, of course, but we could use it to do Pagemaker faster).  The photos showed a lot of rust on the RF shield so I was worried the battery exploded...but they...
Top