Recent content by embBambooLounge

Thank you for your thorough suggestion. The voltages are checking out all in spec so I don't think I have a analog board issue anymore. Checking the TSM I am seeing: PIN 1 - 15.6mhz PIN 2 - 15.6mhz PIN 3 - 7.94mhz PIN 4 - 22.2khz PIN16 - 1mhz PIN17 - 5.2mhz PIN18 - 2mhz PIN19 - 2mhz For the...

Unfortunately it doesn't seem to be RAM related as I put all four original sticks back in and get the same thing. I tried 1MB sticks from a classic and saw the same thing. Thank you for your suggestion though!

HI! Thank you for pointing that out! I had removed some RAM to troubleshoot and I was trying all different combinations just to see if I could get different behavior. I will try again later with the original RAM to confirm if there is still an issue. The resistor is clipped and I assume it...

Thank you to everyone that helped me get the analog board working after chasing down and replacing 5 parts (other than capacitors). On one of the tests I ran (https://68kmla.org/bb/index.php?threads/macintosh-plus-analog-board-120v-help-r2-and-r3-burning-up.44175/#post-485518) the board made...

After following a trail of failed components one of the failures reverberated through to Q2 and caused it to fail. After finally receiving the part and putting it in I have stable voltage throughout. I can hear the high voltage kick in and the board powers up but now I am having logic board...

Thank you to everyone that helped me out with this project. I got the capacitors and replaced on the logic board AND with the correct polarity and it booted up! I can't believe it! Even the old hard drive spun up and it loaded system 6! I am so excited! The RAM expansion board worked as...

Last night I went over the analog board looking for reversed capacitors and I found another one in the crowded area of the board where the + marking wasn't as straight forward so I fixed that and replaced the one that went bad. Now when I power up the analog board (without the logic board) I'm...

Wow, this is incredibly embarrassing .. I am beside myself. I have never swapped out for tantalum caps before and boy oh boy am I embarrassed. Would this reverberate back into the analog board and cause C2 on the analog board to go sideways as well? Thank you for your help - I actually have...

Absolutely! Thank you for looking!

My Dad pulled our original Macintosh Classic out of a closet and gave it to me last week. We thought it was sold at a yard sale but it turns out we still had it. After giving it a once over the logic board had some capacitor leakage but no real damage. The analog board was a mess with...

I just pulled them from the board to test again to see. It looks like Q1 is OK (first picture) but Q2 seems to be testing bad! I had previously tested these out of circuit but perhaps something happened to them after replacing CR21? Thank you for this suggestion, I am going to start with...

I am looking for a little help bringing a Macintosh Plus analog board back from the dead. When I first got the Macintosh Plus and plugged it in there was not much of anything happening. So, I decided to recap the board using the kit from Console5 as a first step. The sleeve on the side of the...

I would be interested in two adapters! Please add me to the list.