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Recent content by timoog

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    PowerBook 3400/Kanga Battery

    Aha really, just ordered new cells :confused: you think the board gets bricked as part of reconstruction or after long term battery degradation?
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    3400c RAM weirdness

    Hi getting a 3400 up and running (240) lovely machine came with a 64MB ram expansion, recent few days it’s be raising an intermittent memory check error on start up and then only using 32MB. anyone have similar experience? wonder if it’s a broken solder connection or a mb connector issue? On...
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    IIsi Fuse blows in recapped power supply?

    Thanks I will, you too. So yeah the video is a tutorial on testing bridge rectifiers, my question was is it normal to get a reading on the two ac pins? I was getting .600ish in one configuration, see first two pics below. So as it happens the new rectifier turned up today and no, it’s not good...
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    IIsi Fuse blows in recapped power supply?

    Yeah appreciate that @techknight, not skilled at testing some of these more complicated components - hence the video, trying new parts is a way forward. Even with the schematic I'm not sure which components you're referring to, can you give me a reference at all? Hope it's not grenaded itself...
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    IIsi Fuse blows in recapped power supply?

    So following this guide on YouTube looks like the bridge rectifier D101is shorting - I understand from this that both middle ac pins shouldn’t give a reading but I’m getting .6 from pin 3(- lead) & 2(+ lead), can anyone confirm?
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    IIsi Fuse blows in recapped power supply?

    Replaced the diodes at 105 & 106 same issue, just starting to replace components now! Following this thread https://68kmla.org/bb/index.php?threads/macintosh-iisi-power-supply-diodes.32114/ I’ve ordered a STR80145, not sure how to test these so ordered replacement, probably D101 too. - any...
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    IIsi Fuse blows in recapped power supply?

    Hi Joshc, on pause for a few days, figured out how to test continuity on those traces, all seems good. Ordered some diodes and a couple of thermistors will re-flow those joints at the same time and see. Watching videos on repairing switching PSUs!
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    IIsi Fuse blows in recapped power supply?

    TH101 was blown apart! have replaced, diodes read ok and resistors check out - and still blowing fuse, some corrosion on the board from around D301 C302 see picture, maybe from leaky cap previously could this cause short?
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    IIsi Fuse blows in recapped power supply?

    Yes Sony, thanks Joshc something to get started with, much appreciated
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    IIsi Fuse blows in recapped power supply?

    Recapped the power supply and main board a couple of years ago and all working well, not used for 6months or so went to boot up last week and there was a pop from the psu, I’ve taken it apart and had a clean round no obvious faults, replaced fuse and pop again, any ideas or advice on where to...
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