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Westinghouse

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  1. Macintosh PowerBook 145/160/170 battery replacement

    Hi jinnai; Thanks for the kind comments! The tabs are only there as standoffs to hold the battery secure within the recess against the back of the original sliding case cover. I didn't feel that I'd be able to get the original sliding cover to match up well with a printed tray's sliding cover tracks without doing several rounds of prototyping - and since I don't have a printer of my own, this solution was good enough for my purposes... so the sliding cover from my original battery is a separate part from my printed tray. They also double as fingerholds so that I can pull the printed tray out when the sliding cover is removed.
  2. Newton Keyboard X0044 -- no shift?

    Any chance it could be the ic in the keyboard?
  3. Yet another Macintosh Portable repair thread.

    Done for now: Best I can figure: there's something off in the charging circuit which causes my portable to act up after charging a battery in the bay. If I charge a battery in the portable with the original portable AC adapter, it sometimes gets unstable, and will not boot afterwards for a while. Fortunately, I have the external battery charging tray; charging the battery exclusively on the tray, and not in the portable itself, has been a consistently workable solution for me.
  4. Newton Keyboard X0044 -- no shift?

    I've had a Newton Keyboard to go along with my MessagePad 2100 for years, and they have always played well together. Today, though, I find that neither shift key on the keyboard is doing anything. Typing input with a shift key depressed yields a lower-case letter (or the 'lower-case' typographical symbol on a key-- ';' instead of ':'). Caps Lock still provides capital letters. Every other key works, including Ctrl, Option and open-Apple. Same behavior when used with an eMate 300. Any ideas as to what might be causing this behavior? Is it likely within the keyboard, or in the serial adapter?
  5. Yet another Macintosh Portable repair thread.

    I hate to leave a thread like this open ended, in case someone else is pursuing the same issue in the future. I pulled out the portable this weekend, as I finally had some free time to address this issue. I set it up and powered it on to refresh my memory regarding its unusual behaviour. It booted right up -- no problem. It ran solidly all weekend, both off of battery, and off of power adapter. It worked through an HDD init and OS install; it worked though software intstall from floppies; it worked through software install from FloppyEMU; it worked through AppleShare serial file transfers. I shut it down, restarted it, sent it to sleep and awoke it I don't know how many times, and it always worked perfectly. I moved it from place to place, still worked. Even the HDD inactivity spindown and corresponding spinup worked perfectly. Here's the thing, though -- I didn't do anything since my last post. The problem seemingly resolved itself. The only two variables I can think of are: 1. It is now summer - ambient humidity is higher. 2. It was stored in the Macintosh Portable bag in a vertical orientation for the past few months. I'm thinking that the latter is more likely to have had something to do with it - perhaps there was some stress on the board that was causing a cracked solder joint or an iffy trace to open up. Maybe the 'rest' time in the bag allowed the stress to ease.
  6. How did you get into this?

    Got my MP2100 in '05; case, keyboard, modem, flash card, power adapter - just over $100 with shipping. It was an experiment at a laptop replacement since one of my laptops had died... real work was done on my desktop, so something for quick notes and sketches was the aim. It was ok in that regard; would have been better in the '90s - connectivity was a problem at the time, but manageable. Email still worked back then (no https), and some WiFi; both are not as workable in a modern context. Got an eMate recently; a seller on eBay local to me has a large stash from a school board. They range from 'pretty good' to 'terrible', (scuffs, bad hinges) but their being local allowed a visit and a pick of the litter. $20, local pickup, stylus, no power adapter.
  7. Westinghouse's finds

    *Double post*
  8. Westinghouse's finds

    Got an LC II + Macintosh Color Display today; it's been a while since anything vintage has come up locally for a reasonable price, and it seems like beige Apple monitors are getting hard to find around here, either alone or with a system.
  9. Yet another Macintosh Portable repair thread.

    Thanks -- before put in too much time following traces, is there any info anywhere of which pins are connected between these ICs?
  10. Yet another Macintosh Portable repair thread.

    Voltage appears to be stable (on both wires), and the switch in the battery compartment seems to be working correctly. I'm still getting this error.
  11. Yet another Macintosh Portable repair thread.

    I'm back: same portable, different issue. I mentioned before that I have been having problems with the hard drive. I've tried a few things; bear with me as I list them out. I had a few successful boots from the drive (with a 6v battery clipped to the battery bay connectors, and the adapter plugged in) before I did anything to the hybrid, though it progressively got less reliable, sometimes crapping out after the initial spin up, only to "catch" on the second spin up. Sometimes it would never get going. I cracked the drive open and cleaned out the goo. It all appeared localized to the groove. This had no appreciable effect. Around this time I did the hybrid board work. Battery only from this point on. Post hybrid board work, behaviour remained the same... Very rare for the drive to 'catch' and read on a spin-up, but it would on occasion. I decided to try swapping in the Conner HD from my IIsi, by swapping controller boards. The IIsi drive didn't work in the portable with the low-power board, and the portable drive didn't work in the IIsi with the regular molex/scsi board. The IIsi drive worked fine in the IIsi when reunited with its original board. Assuming that the low-power board and drive were dead, I built an adapter cable as described here: http://antinode.info/mac/port_scsi.html I connected the IIsi drive up in the portable with this adapter cable, and on boot, the portable showed me the 'Welcome to Macintosh' screen... And then the drive spun down, and got stuck in a spin up / spin down loop. I tried again a few times, with similar results. It seemed like it was having the same problem that it had with the low power drive. AND THEN IT WENT BOINK. One boot game me the chimes of death. I disconnected the hd, but it didn't have any effect. I figured I had well and truly wrecked it, as it came up exactly the same on several reboots. ...Then, 10 minutes later, it chimed up as fine, and gave me the disk missing icon. It booted fine off of a floppy, and off of FloppyEmu after that. Curious to know if anyone has any ideas, given this scenario. The portable still boots fine off of a FloppyEmu​, so it's not just a pretty prop, but I'd love to get an internal HD back into the mix. I'm a little leery of trying anything to that end at the moment, given this misadventure.
  12. 3D-Printed Objects

    If I had one, I might. My SE/30 came without one.
  13. Yet another Macintosh Portable repair thread.

    Well, the resistor across pins 16 and 18 send to have done the trick! It now properly indicates charging, and charging cuts off when the battery is full. I even got a rare boot off of the failing hard drive (degraded seal is removed, heads only seek every once in a while). Thanks for the assistance!
  14. Yet another Macintosh Portable repair thread.

    It really is not bad. I appreciate that the backlight makes the screen usable in a low-light environment, but having spent time playing GameBoy in my youth, this is -in my opinion - better in terms of viewing angle, and of course, resolution. Not bad for 1989.
  15. Yet another Macintosh Portable repair thread.

    What's the value of the resistor near pin 1 of that IC supposed to be? Looking at that picture again, having posted it, it looks a little cooked. I'd like to be able to meter it out.
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