RE: Measuring a resistor in-circuit...

"a
resistor should never measure out to have *higher* resistance in-circuit,"

This is correct but one thing to watch for is if the board has been powered
up recently you could have a capacitor discharging through the suspect part.
this can confuse your meter. Just yesterday I found a resistor on a board
that
looked as if it were totally "open" but after putting a jumper across it for
a few
seconds I measured again and got the expected reading.

                Craig Holm

-----Original Message-----
From: owner-rasterlist@synthcom.com [mailto:owner-rasterlist@synthcom.com]On
Behalf Of Andrew Wilson
Sent: Tuesday, July 30, 2002 11:34 PM
To: rasterlist@synthcom.com
Subject: RASTER: Measuring a resistor in-circuit...

Hi all,

I never did find any neogeo schematics, but I think I may have found my
problem anyway. There's a resistor in the part of the circuit that is
measuring far larger than it should be (making me think it's a partial-open
circuit).

Just to double-check, though - from what I recall from Ohms law, it's
possible for a resistor to measure *less* than it's actual value in-circuit
(if there's another resistor in parallel with it, for example), but a
resistor should never measure out to have *higher* resistance in-circuit,
right?

-atw

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Received on Wed Jul 31 05:14:45 2002