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Found 17 results

  1. Hi there, it's my first post! Some time ago, the PSU in my IIsi suddenly turned itself off while running. Recently I opened it up to try and fix it and found 4 leaked caps on the secondary stage. The electrolyte had corroded through the legs and affected the solder mask and some pins on the bottom side. No unrepairable damage though. Cleaned the mess off, resoldered the oxidized wires and replaced the bad caps. Then tested the bare PCB on my desk with a fog light as load on the +5. It worked absolutely fine again: briefly touching /PFW to PSTRICL turned it on, touching /PFW to GND turned it off. After ten minutes it still worked fine, so overjoyed I put the thing back in its enclosure. Then tested again: /PFW to PSTRICL still turned it on, but as soon as I let the connection go, it turned off. Puzzled by this sudden change in behavior, I touched /PFW to GND to see if that would reset something. Or so I thought, because it wasn't GND -- I took the wrong hole in the connector and instead touched /PFW to -12... No smoke but then it didn't start at all anymore. My heart sank when I realized my mistake -- all my meticulous work, ruined by a single lapse of attention! About a minute later the main fuse F101 suddenly blew, completing the misery. I was quite upset by my stupid mistake and I'm still mad at myself right now... I later reverse engineered most of the main PCB and the daughterboard PCB. All parts on the main PCB seem to test OK, so I'm not sure why the fuse blew. On the daughterboard (https://cdn.pbrd.co/images/5dxpafFDF.jpg) I found three SMD parts with one open PN junction each. Alas Q1 and especially Q2 have such unclear markings that I can't guess what they are, thus halting my resuscitation endeavour. Hence my questions: Can someone identify Q1 and Q2? Their markings may be clearer on your own unit than on mine. Q1 may be "18" or "183". Q2 is very unclear but might be "13" or "132". Q3 is definitely "14" (etched) although it's not visible in this pic. Does anyone have a spare PSU for sale, or the daughterboard from a broken one? Converting a regular new ATX power supply to IIsi may just involve some rewiring and a logic inverter between /PFW and PWR_ON. Indeed I found this post: https://68kmla.org/forums/index.php?/topic/28901-microquadra-630/page-3 Is this approach known to work for a IIsi?
  2. Hi all, been a while since I last posted here, about the same time I tried to use my IIsi(s)... so dug them out but neither of them would power on. I would get a brief click, fan and light then they would power off again. Tried replacing the fuses, which might have done more harm than good since the guy sold me slow fuses by mistake which I stupidly tested anyway. after getting the right fuses they blew straight away. so did some continuity testing and found at least a couple of the zener diodes are allowing current in both directions, but there’s no way I know of to know their values. Wondering if anyone would happen to know what diodes are used at D302 and D305? See attached photo. Thanks in advance!
  3. It is with great shame and embarrassment that I submit this post. I was working to get my 2nd soft power transistor build and when I went to test, I forgot that the power supply was still plugged into the IIsi motherboard. When I flipped the power strip on there was a pop and then that smell... Here is the board: And here is what literally blew up: My walk of shame explaining this begins now. The board was on the bench and plugged in to the SeaSonic power supply with all wires except for pins 9 and 10 (+5v_SB)...these were floating freely on the bench. I believe pin 9's wire connects the soft power transistor such that when the keyboard power on or the power button is pushed. I thought the power supply was only connected to a spinning drive so I could see if the soft power transistor work. What happened was the wire connected to pin 9 was lying across the open SeaSonic chassis and its metal end shorted on something when the PS was powered on. This appears to be the extent of the visible damage. Did I kill me IIsi or is this something that could possibly be fixed?
  4. ktkm

    IIsi saved!

    Hello! I saved (from Swedish fleamarket) an IIsi, AppleColor High-Res Display and AEK II for 50 SEK (approximately 5.45825 USD) yesterday. No leaking caps and a MacCon ethernet adapter installed. This is my first IIsi so all tips, tricks or ideas are very welcome! Cheers from a sunny Stockholm! /KTKM
  5. Hi All, I had Ebay seller AllMacs recap both my IIsi board and one of my SE/30 boards. I have bee using the board in the WtM configuration for a few days without issue. Prior to the recap I got this scary image on screen and decided it was time to get on with the recap... Here is a shot of the board before the work: And here is after: And some shots of this work, "As you can see the trace on this pad was making no connection, due to corrosion . I fixed the damage with a new pad and reconnected it" I'll report in on the SE/30 after I get a chance to use it this weekend.
  6. Hi All, Over the holiday weekend I was able to pull out my IIsi motherboard and of my SE/30s to be recapped. Both need their power supplies addressed. The IIsi is pretty maxed out in terms of what I run it it so I am interested to see if an ATX has been hacked into the IIsi. I have seen ATX going in SE/30 PSUs however they are slightly larger. Anyone done ATX with a IIsi? THx!! ~Von
  7. Conquests seemed the best fit for this post so here goes... About 2007 when I started my vintage Mac collection with my first SE/30, I needed a way to get files fetched from the interwebs to the Mac form a PC-based home office . I found my way to using Netatalk on Mandrake then later on Mandriva Linux distros. Netatelk provided the ability for Mac running Systems 6-9 to connect to the PC running Linux. It is similar to Services for Macintosh available in Windows Servers all the way back to NT Server 3.51. The vintage Macs went into storage as family and house projects took priority. In 2018, time allowed me to get the old Macs out of storage... Now I had a slightly different networking problem as my home office is all current-era iMac and MBPs. I posted here about getting Netatalk going on a Lubuntu Virutal Machine running in VMware Fusion on my MacBook Pro. That article on Applefool is a fantastic guide. So all is good being able to network SE/30s and IIsi directly to the MBP. When running System 9.2.2, the G4 QuickSilver also connects via Netatalk. What also was sitting in the office were my 2 old PCs. One of them is my Museum box that boots to many OSs on 2 drives toggled with the ASUS P2BS BIOS: SCSI Drive (partitions toggled by PowerQuest BootMagic) Partition 1: (OSs toggled with the NT 4.0 boot loader) DOS 6.22 Windows for Workgroups 3.11 Windows NT Workstation 3.51 Windows NT Workstation 4.0 Partition 2: Windows 95 Partition 3: OS/2 Warp 4 Partition 4: Windows Millennium Edition IDE Drive (partitions toggled by the Win 2K boot loader) Partition 1: Windows NT Server 3.51 Windows NT Server 4.0 Partition 2: Windows 98 SE BEOS Personal Edition with loads from Win 98 SE Partition 3: Windows 2000 Partition 4: BEOS v 5.0 that boots from a 3.5 boot disk The drives in this machine were pretty old as this PC was acquired in 1998. I replaced both drives with E-Disk SSDs that I scored from eBay. So now the drives and OSs are all working and all of them (except for BEOS) could mount shares on my second PC running Win XP. The next thing I wanted to solve was being able to connect the PC OSs directly to the Lubuntu VM. I knew that Samba could likely do this and after some digging I finally got this working. Here is my post on the Ubuntu forum. Now from my MBP in can connect every old OS that I own directly to the laptop via the Lubuntu VM. When the G4 QuickSilver boots to 10.2.8, it connects to the Samba share as does the MBP. I gave my propellor beanie 3 spins after I got this sorted.
  8. Earlier today I won an auction for a Daystar Turbo 601 66mhz and I unfortunately don't have a IIci or supported model or the needed IIsi adapter to run it in my IIsi. Bolle mentioned in the Trading Post forum: I would definitely be interested in one of these if a batch were to be made. That drives a question...if one had the Turbo 601 and the needed IIsi adapter, could that not be run in a SE/30? I found several posts on the topic of getting the 601 running in SE/30 but it seems that this has not been achieved....
  9. WTM = wafer thin mint...if anything else is added, it may explode. OK, I had this setup running several years back but never documented it...so here it is: In this configuration I get 1024 x 768 at 256 colors. If I change to the Apple 13" monitor colors increase to "Millions" but resolution drops to 640 x 480. I prefer the former. Above is System 7.1 and it runs fine on 7.0.1. 7.5.5 shown below: Chooser is showing my 3 networked Lubuntu servers, one of which is a VMware Fusion VM running on the MacBook Pro I am authoring this post on. The Copy is one of these screen captures. Here is how this all made it inside the case. This is just before the lid goes on: Under the floppy sits the Asante daughter card with its rainbow ribbon. The ethernet cable was poached from one of those retractable travel units as it is thin and pliable: The 180 MB Adtron SSD sits in the stock drive tray and has its own LED that I zip tied just under the IIsi LED so both can be seen when there is activity. To have a working fan, I purchased a dead IIsi fan enclosure and made some mods: Modded fan is on the left where I added a thinner fan that has the standard 3 wires, one is a rheostat for fan speed (white wire) which is not presently used but may be in the future. Below is shows the fan grill snipped out. This is where the rear-facing edge of the Daystar SE/30 adapter pokes through and rests. Final assembly had me removing a bit more of the already-cut inner ring so that the area from about 8 to 9 o'clock are gone. Now the fun part... Above is the bottom of the video card with all the goods attached. To make this work I had to lose the video card's video capture daughter card. This freed up its PDS pass-through and gave me an opening to slide the ethernet cable through. In the PDS are first the Asante card with its math chip removed...same for the riser card which also had a math chip. To get things to fit, the Asante has a 90 degree PDS inserted and then 2 straight PDS inserted. Not shown is a rubber stick-on rubber bumper thing on the back side of the 2 straight PDS pieces. This allows the 040 to rest on when it is in position. Also not shown as the zip ties in the 2 corners of the Asante PDS where the 90 degree PDS is inserted. These ties fight gravity pulling the works out of the Asante. Next is the Daystar SE/30 adapter for Cache/030/040. I went with this card as it was unused, smaller than the IIsi adapter with pass through and that adapter would have the 040 doing a 270 degree backflip vs the 180 backflip with the SE/30 adapter. Here is the top of the 040... It gets 2 90 degree PDS units so it can attach to the SE/30 adapter... I have had this together for about 36 hours and all seems stable. The only crash I had was when I was trying to decompress a new word processor and I don't think that was related to the configuration. To do list: 1. I'd like to add a rheostat to the fan as it runs at 100 percent and I think it could be dialed down some 2. I need to get the motherboard recapped...It has never been and its chime is starting to fade
  10. Hi All, I am about to start in on several vintage Mac projects and one of those is my IIsi. I had it using a generic 15" LCD display with a VGA adapter. This setup worked fine on both native video as well as video card I could run out of the PDS slot (I think it is a Video Spigot). In my collection exists a 15" Apple Cinema Display that uses the proprietary ADC connection. On eBay are several Apple DVI to ADC adapters...I'd need one of those to start. That would get power to the monitor and the video signal to DVI. I then need to get that signal to the IIsi. There are DVI to VGA adapters and I have VGA adaptor on my IIsi which I think is VGA to DA-15 (see towards the bottom under "Connectors...Original DA-15 -- commonly but incorrectly known as a DB-15 -- used on all desktop Macs without a built in monitor up until the 1999..."). Questions: 1. Does a DVI to DA-15 adapter exist? There seem to be plenty of DVI to DB-15 however I'd like to avoid 3 adaptors in a row... 2. Has anyone been successful in getting an ADC monitor working on an IIsi or similar? THx! ~Von
  11. Recently got a IIsi and finally cracked it open to find this lovely and strange card, there is no marker of what model it is. I am thinking dual PDS adapter similar to the SuperMac one that shipped with Spigots. Anyone have more info?
  12. patatas

    New acquisitions..

    Just got hold of the following in full working order: IIfx with Radius Thunder IV GX 1600 IIsi LC475 Laserwriter 320 HP Deskjet 550c with AppleTalk Stylewriter Apple CD300 2 x Mac Video adapters 8/32 RevB 2 x Macintosh II adapters 2 Apple Color Monitors 1 Apple LC monitor working on compiling configurations. Attached a couple of pics of the IIfx...more to follow
  13. Hey all, I know our friends over at BMOW have their rom module for sale at 2mb and there's one on ebay thats 1mb, but I have a design in progress for a 8MB (ish) simm that would allow for the installation for bigger ramdisks and the like. Throwing out a feeler here, anyone interested? OW ill probably just fab up some boards for my own use. (oh and buy BMOW's programmer because finding 72 simm slots is impossible )
  14. Are AAUI transceivers interchangeable between brands, both the cards and transceivers? The reason I am asking, I have a combination video and Ethernet card for the IIsi that has an AAUI port. I have an Apple branded transceiver that works great with my Quadra 700. But when I use it with that combo card on my IIsi, it doesn't light up at all. The combo card has an Asante branded Ethernet portion, so will I need an Asante AAUI transceiver? Or is something hosed with the Ethernet portion of the combo card? TattleTech does see both the video and the Ethernet portions of the combo card. Anyone else have one of these combo-cards?
  15. Hi everyone. I'm new to this forum. I have a collection of about 35 machines and with my brother we're planning an exibition in my kid's school for the sience week. I've been away from my loved machines for a while, since life with small kids demands a lot of my free time.... Ok. So I went back to the shelves I've started turning on some machines among then my "pet" a IIsi. Din't power on. So. Open the lid and found the battery leaked. I cleaned the acid with alcohol, but don't know what else can be wrong. The oscilator's metal cover have rusted since the last time I recall. Perhaps I can post a picture of the mainboard, so someone can tell me what you think? Excusme for my wrong english. Thanks in advance Seba
  16. It's Alive! Well, not exactly, but it was successful. Washed the board, dried it with my heated air pencil, and did each capacitor one at a time. GOD WHAT A HEADACHE! Took 2 hours! But in checking and rechecking, I found no rotted traces. NONE! What Luck! I did find that several caps were glued to the board, making the cap removal that much more harder. But there was a problem - the black caps I use were slightly larger than the space the old caps allowed! So there was some trouble soldering each cap, so after each cap, I checked each one with a multimeter to make sure it connected to the board, the joints and the traces. This particular IIsi has a dead PSU, this I know and it needs a recap as well (perhaps one day!). But the other IIsi I have has a questionable PSU. In swapping them for a test - the board turned on, audio works, issues with the VGA monitor resolution occurred but that was expected. Also - the original RAM in the machine is dead, giving the Chimes of Death. But swapping out with working RAM I know - the IIsi turns on and boots! Mouse works, keyboard works too! But again, this second PSU is iffy, and after it warmed up, problems came up. Sudden Shut Downs, sudden restarts, boot freezes. etc. Let it cool, and works fine until it gets warm. So congrats to me! Looks like I got the curse broken. The other IIsi will get a recap tomorrow or during the weekend. It depends on how I feel after I get my second radiation treatment early tomorrow. Just got to figure out how to open the PSU. It looks what a tin can of food would look like to a cave man armed with a rock.
  17. Just finished a recap on the other Mac IIsi I have. Almost there but not quite. Power supply turned on and clicked for a while. Eventually the PSU got it little's head straight and finally gave me a "Bong!" Followed by the chimes of death. I'm going to recheck the recapping job and see if anything is shorted out. But at the same time, this is an iffy PSU and the other PSU is dead as a door nail. Mind you, before these two Mac IIsi's did not even turn on before. The PSU would click several times and then become quiet and that's it. Nothing, nada, DOA. I have a lot of questions to get it going but first, I need to recover from a long day and radiation therapy I had this morning. It giving the Death Chimes says it wants to work and that it's almost there... Can the IIsi run without the onboard RAM? Can the IIsi be powered (temporarily) by the IIcx/ci PSU?
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