I'm recapping three Mac 128k analog boards. I took the easy path and ordered the cap kits from Console 5. I am on the 2nd board and noticed that the old C6 (22uF 50V) cap has a resistor attached to it. The other two boards did not have the resistor attached and the old capacitor...
Thanks for all you help. I got both 128ks back up and running. Replaced all the chips (new are socketed) on the multiple failure board and a single one on the other.
Now I have another project with a 040038 sad Mac code.
I believe this to be a bad RAM chip at G7?
If this is incorrect, I...
dochilli, thanks for your help!
Yes, I was planning on changing them out as a start.
Always wanting to learn, can you direct me to where these nuggets of information are revealed for future reference?
I have two 128k boards that I’m working on.
The first will bong on startup with SadMac 04919A.
04 = Memory Test-Mod3 test and identifies a bad chip or chips.
A sub code of 000A sub code meaning is Line 1111 (I don’t understand what that means). Also, I don’t understand the...
I have a Mac IIfx that has been recapped with an Apple 630-4222/630-4230 high resolution display video card installed that has also been recapped. The computer runs fine. I am using an apple color plus 14” display (M1787) and getting vertical lines on the screen.
I know the...
Update one this. I actually found the tiny transistor in the bottom of the case. I soaked it in IPA, cleaned it up and soldered it back in place.
Mac IIci is up and running again.
Thank you community for all the information.
Recapping another IIci board and noticed that one of the small black diodes is missing from Q3. I assume it is the same diode that is on D3, D4, D5?
I need to purchase a replacement, but haven’t figured out what to purchase. Any help would be appreciated.
I have attached some pictures for...
I have had a project IIci for quite some time. I recapped it and ran it through the ultrasonic cleaner; the board looks very clean. When I go to start it, I simply get a click; either from the soft start on the keyboard or the power button. I figured it was a bad PSU, since they seem to go...
I've been following this thread along with others on the IIsi PSU. I have four IIsi PSUs that I've been working on over the last month. Three are Sony models and one is a MagneTek. I have recapped them all (along with the daughter boards) and have one Sony working and the MagneTek working...
I had a friend drop off a color classic board with some really bad cap leakage. I am trying to save the board so I took the caps off and everything looks okay except down at c9 and c10. I can put solder mask over the exposed traces at c9 and the pad that was gone at c10 is the negative side...