Franc Zabkar wrote in message
...
On Fri, 28 Sep 2007 15:30:13 +0100, "N Cook" put
finger to keyboard and composed:

A 2W resistor in a pc ps, o/c with no sign of heating at all,so clearly
marked bands of red,yellow,yellow,gold, silver.
Before I remove it and make an axial scrape along the coating would
anyone
know what that value should be ? 3 band accuracy in a pc or is there some
other convention not ordinary 5 band coding ?

The only places I can think of that would require a precision resistor
(but not fusible) would be the voltage sensing inputs of the PWM
controller IC on the secondary side, or maybe the +5VSB supply. In
these cases precision resistors are usually preferred to trimpots.

If you could describe the circuitry in the immediate vicinity, or
provide a photo, perhaps someone may be able to make sense of it.

- Franc Zabkar
--
Please remove one 'i' from my address when replying by email.

Now taken apart and no longer viewing this R skew on.
It is 5 bands as stated but is only 1W.
Doing an axial scrape it was obviously 240K and goes between the rectified
mains + to pin 3 of a 4 pin , TO220 device marked
1HO165B and italic f logo so maybe Fairchild power switch KA1H0165R so
plenty of datasheets,
pin 1 of that device goes to mains rectified -ve

So still a mystery of the gold and silver bands 4 and 5

--
Diverse Devices, Southampton, England
electronic hints and repair briefs , schematics/manuals list on
http://home.graffiti.net/diverse:graffiti.net/