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ironborn65

68kMLA Supporter
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About ironborn65

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  1. @bdurbrow, indeed, but the issues here is not the chip being swapped, but rather of being shifted in the socket, i.e. they are not aligned
  2. but at the end, despite they being not aligned, the ROM sockets are a pin longer, still weird, is it? I checked Bruce's resources, the chip sockets are really a pin longer https://recapamac.com.au/macintosh-colour-classic/ The previous owner was poking around with the ROMs
  3. Hi all, I was looking at the logic board of my Color Classic, still untested because the analog board is broken. I noticed there one more pin per raw in the socket then pins in the ROM chip. And, in addition, the two chips are not aligned, I can not test it and I do not have a spare LB for a comparison.. Is it really weird or is it normal?
  4. It worked @cheesestraws, the sparkfun has a link to the original download page of the chip manufacturer. ZTerm on the classic and CoolTerm on the other side can now connect at 19200 (the max for a classic 68k). CoolTerm can send binary files but it does not implement any file transfer protocol. I did not find any z/x/ymodem software for MacOS, at least not for free. So, I was hoping to use ZTerm from BasiliskII flawlessly but I was wrong. My device path on the MacOS is /dev/tty.wchusbserialfd120, I typed it in the Modem Port field on Serial/Network tab in Basili
  5. ah hahn ...thanks @cheesestraws, given CHIP ch341 I googled something http://www.wch-ic.com/downloads/CH341SER_MAC_ZIP.html or better https://learn.sparkfun.com/tutorials/how-to-install-ch340-drivers/all Shall I give it a try?
  6. https://www.banggood.com/Translucent-USB-To-RS232-Serial-9-Pin-Converter-Cable-Adapter-p-987980.html?rmmds=myorder&cur_warehouse=CN I found no name of the chip. And no manual of course...
  7. Hi everyone, I do not pretend this is a hack, but IMHO it's the most correct area. I want to connect my compacts (SE, Classic...) via serial to an almost legacy MacBook Air mid 2012. I wired the null cable modem min din 9 to DB9 (https://macgui.com/news/article.php?t=434) I got a USB to serial Now I need a driver for the High Sierra. The only one I can find is https://www.mac-usb-serial.com/ It's not for the $6.9, but I'd rather avoid paying if there is an alternative, as a matter of fact I wired/soldered the cable. Ru aware of any other o
  8. last update all the red boxes/circles identify the replaced parts
  9. nop, I did not I removed most of the H2O than I used an air dryer to remove the rest + 24 h on a warm place
  10. @bibilit done, I replaced the DP3 and DP4, but I got no improvements, at the beginning it was even worst ... @PowerMac_G4 I have other details: at the first boot I had about 5 large and faint vertical bars and no chime at all then they start wobbling I kept having this behavior for a couple of more boots then it played the chine and the screen was wobbling on right and left side (like a vertical moving sinusoidal), no bars, well you could say that the bar was just one as large as the screen this effect was less and less evident over time After about 3 minu
  11. tks @bibilit, I'll replace them, YIC ;). FYI I test my components with https://www.amazon.it/gp/product/B071Y5CHPK/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1 https://www.banggood.com/Geekcreit-LCR-T3-LCR-T4-Mega328-Transistor-Tester-Diode-Triode-Capacitance-ESR-Meter-Assembled-p-1399450.html which is the assembly of a German Open Source project
  12. @PowerMac_G4, I got the AB with severe leaking caps, I replaced them all from the low voltage section after cleaning in the washing machine, and with cotton swab with IPA, no soaking in IPA I must admit. Then the fuse got blowed up, so I replaced the IRFEC40, the TDA4605-3 and the CNYG17-3. I tested DP1 DP4 DP3, which were ok (no shorted). I tested randomly the other capacitors which were in the expected range for loss and ESR. At this point it stared rebooting as it does now. So I kept replacing other parts. the two filter capacitors (one was cracked) and blindly ALL the remai
  13. @bibilit, cool. What's jack for? Extracting the +5V?
  14. @bibilit ah! Thanks pal. this is interesting!! Now I need to know how to feed the MB with voltage: are the 5 pins on the top most connector (relative to my photo)? more about the AB+PS: I replaced all the capacitors recommended by Bruce. During bench testing the voltage are unstable, shifting from +3.5 to +5, and from +8.5 to +12 on the HD pins, apparently the +5V and +12V are available without soft power. The voltage are shifting also at the beginning of the low voltage section, just after the flyback transformer. I tested the optocoupler (I identified a diode
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