Kit problems-LOPT/FBT

<x-flowed>Any of you building the flyback meter kit might find this interesting:

Had a student build one on the bench, and after assembly the thing didn't
work quite right. The two red LEDs were on, and when the test coils was
used, the display only went to the second yellow LED. Parked it in the
"Look at later" box for a month and today pulled it out and took another
look at. All parts looked and tested good, Diode check showed all diodes
happy, no shorts, ICs exchanged with a working unit-OK. Took out scope and
turned on the unit. The output of the test signal was WAY too high. The
clamping diode wasn't working, YET the @$#%#@$% thing passed the Diode
test! The !@$# Diode tests good out of circuit! Sheesh, what sort of parts
is DS using these days? Magic? I'm sure we left the smoke in the diode...

Oh, well just thought you'd be amused...

John :-#)#

  John's Jukes Ltd. 2343 Main St., Vancouver, BC, Canada V5T 3C9
  Call (604)872-5757 or Fax 872-2010 (Pinballs, Jukes, Video Games)
  http://www.flippers.com
         "Old pinballers never die, they just flip out."

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Received on Fri Jan 21 08:26:08 2000