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wow what are those for??

some updates here the board was cleaned with the magic sponge LF2 despite the look, is not shorted and it tests 25mH not like the 15mH @daanvdl measured (thanks), but I'll keep it. LF1 looks terrible but there is no short and it tests 0,4mH and 0,5mH respectively L10 L6 test 0.2mH, I added a...

Thank you, @daanvdl, and thanks for the PCB recreation. Could you provide the specifications for the line filter? Would any line filter work? I have some non-functional switching power supplies, and I was thinking of measuring the inductance to ensure a proper fit. Is that the correct approach...

I'm browsing for this info, I got the Apple one, but I'm looking for the BOM because the inductors L9 L10 are probably gone and also the transformer, LF1 LF2 It's unclear if the circuit of the reloaded and its BOM correspond to the original Apple board. I'd like to avoid the reloaded,

@cheesestraws Ah ahn ... thanks mate. I was underestimating this aspect. I found this project for the reloaded board https://github.com/daanvdl/Macintosh-Analogboard any other source to recommend? BTW: the fire started from the RIFA capacitor!

I don't know, I was given the Plus for free in this condition.

this is the beginning of the repaying of the Mac Plus that went partially on fire https://68kmla.org/bb/index.php?threads/classic-lciii-plus-si-for-for-free.48801/ before how splendid! :D it's better not to be frugal and replace all the darkened resistors, diodes and capacitors. What...

@LaPorta ... I feel like I’m nearing the end of this journey unless I have an epiphany or receive some helpful advice here. As described in this thread: Mac SE/30 Silent, No Startup Bong, the short appears to be in the middle layer of the PCB. I’ve already cut the traces before they reached...

I can’t say for sure—it could be, but all the chips are gently warm. In any case, I must locate the short; otherwise, this will be a dead end. Since I’ll need to desolder the CPU for the reloaded board anyway, I might as well give it a try. If the original PCB design were available, I could...

I discovered that A9 and A8 are shorted. I initially noticed this issue, but it seemed to disappear, so I assumed it had been resolved after isolating some of the traces. I couldn't find the source of the short at the time, and since it was no longer present, I decided to proceed. However, the...

I did some more tests bank0 bank1 ROM sound screen - - BMOW happy pattern 4MB - BMOW happy or happy + death pattern/cursor - 4MB BMOW happy pattern/cursor 16MB - BMOW happy + death pattern/cursor - 16MB BMOW 2 death sounds pattern the cases with the stock ROM is always the death...

the pattern is not affected by the RAM size AFAIK the video RAM is not in the RAM SIMM modules but is in the 41264 chips the mouse pointer does not always appear, but if it does it's only with 4MBx1 RAM modules The rominator II plays two sounds, the happy chime and then the sad Mac ... I...

I have some good news—finally, it’s starting to show signs of life! However, there’s a behaviour that varies depending on the ROM image installed It plays the chime of death, but the response differs based on the ROM: With the stock ROM, it displays a pattern on the screen. With the 32-bit...

@djc6 Thanks for your reply and the ideas you shared. Yesterday, I finally got a sign of life from the speaker, so the headphones are no longer necessary. As for the serial connection, it’s on my to-do list, but only after I’m certain the traces have been repaired. From there, I’ll focus on...

please help, I'm now clueless Current Observations: Power Supply: +12V reaches the Sony chips. @slaanesh +5V is present where expected. The grounds are fine and show no shorts. The chips warm up as expected. Clock Signals: Inspected the UG7 clock generator using an oscilloscope: Signals on...

yeah, right, I noticed it.. it's a good start ;)

cool, but how? Repairing the analogue board? Replacing it?

I was handed these Macs for free The Plus went on fire ... what would you do with it??

"It seems that the clock signal from pin 1 of the UG7 PAL16R8B should be a square wave. What could be causing this issue? A grounding issue maybe? Could the testing from outside the case lacks a proper grounding? Should I also connect the ground of the board to the case? Even if don't see this...

I’m currently working on a heavily damaged Macintosh SE/30. The original post on the repair process can be found here: Salvaging bombed SE/30. I've restored continuity in the address lines between the RAM multiplexer (MUX), ROM SIMM, VROM, and CPU, and verified the data lines from the ROM SIMM...