Advice/Suggestions for repairing Apple III power supply
tpeters at mixcom.com
Tue Jul 24 18:21:28 CDT 2007
At 08:59 PM 7/22/2007 -0700, you wrote:
>Hi all --
>Picked up an Apple III this weekend in non-working condition, and I
>suspect the power supply is at fault.
>Symptoms are: On power up, a rapid clicking noise is emitted from the
>power supply (maybe 4Hz or so), and the power LED on the system's
>motherboard pulses at the same rate. Obviously I haven't run it for more
>than a few seconds like this :).
>There are no obviously bad parts (burned parts, swelled/leaking
>capacitors, etc...) that I can see.
Don't run a switch-mode power supply with no load. Some types don't take
kindly to that. The others that suggested unplugging the loads its
connected to now are giving good advice, but it should probably have some
load in it for testing.
396. I've seen things you people wouldn't believe. Attack ships on fire off
shoulder of Orion. I watched C-beams glitter in the dark near the
Tannhauser gate. All those moments will be lost in time, like tears in
rain. Time to die. --Roy: Blade Runner
--... ...-- -.. . -. ----. --.- --.- -...
tpeters at nospam.mixcom.com (remove "nospam") N9QQB (amateur radio)
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