fariss@ptolemy.arc.nasa.gov (Gary B. Fariss) (06/05/90)
My MacPlus just smoked resistor R1 on the analog board. Where can I
find a schematic so as to see what R1 does and what component caused
abnormal current to flow through R1?
Thanks Net!
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73, Gary B. Fariss fariss@pluto.arc.nasa.gov W6KYF @N6LDL
Recom Technologies, Inc. @ NASA Ames 415/694-3181
Mountain View, California 94035gordon@milton.acs.washington.edu (Gordon Davisson) (06/07/90)
In article <5882@maslow.ptolemy.arc.nasa.gov> fariss@ptolemy.arc.nasa.gov (Gary B. Fariss) writes: >My MacPlus just smoked resistor R1 on the analog board. Where can I >find a schematic so as to see what R1 does and what component caused >abnormal current to flow through R1? I don't know where you can get schematics, but I can tell you a little about R1: it's part of the shaping circuitry for the horizontal deflection, and it's hooked up in parallel with L3, that funny-looking inductor next to it. I've seen R1 get cooked because of a bad connection to L3. Oh, and if the color bands on R1 are no longer readable, it's supposed to be 220 Ohms (I think -- I'm looking at an n'th generation photocopy of a schematic made by a defunct company, and it isn't particularly readable). -- Gordon Davisson Westwind Computing (206) 632-8141 4518 University Way NE, Suite 313, Seattle WA 98105