[mdavis]

Hi everybody. I have a Dual 1Ghz DDR PowerMac MDD. To make a long story short, I lost a resister - from the PLL config resister marked "018" on the top side of the CPU daughter card. The bottom side PLL resisters are 1k Ohm and marked "102." I managed to find a "102" in an old PowerBook but couldn't find any "018s." Does anybody know what resistance the "018s" are and where I can buy some? With a 1k Ohm "102" resister in place of the "018" on the top side PLL my PowerMac powers up but doesn't chime - the display also doesn't turn on and no peripherals are powered. It just sits with the fans on. Anyways help would be so very appreciated... Thanks!

[mdavis]

Oh common... Someone amaze us with your knowledge!

[stuffedmonkey]

I could be way off - but the numbers like "102" are locations, I believe, not types of resistors.

[mdavis]

Yeah, I think you're incorrect. I may be wrong though... Thanks anyways

[newtech]

A "102" chip resistor means 1K ohm, the first two numbers are significant digits and the third is a multiplier ( 10^2) in the case of "102" that is 10 X 100 or 1K.

The "018" is another fish alltogether. Logically by that marking it is 100M ohms, a suspiciously high value. alternately the 8 could mean a multiplier of 0.001, for practical purposes making it a 0 ohm resistor or jumper. Best bet is to meter the value with an ohm meter.

[zac4mac]

or flip it over - 810 - 80 ohms? Never seen an 80 Ohm jumper, but I don't do a lot of electronics lately. The PLL resistors in my Gigabit E G4 were 0 Ohm jumpers that I replaced with solder bridges when I OC'd it to 550, from 500 MHz. It's been running 24/7 at 550 since Nov 2000, so I don't think I hurt anything. It ran SETI for a long time, now it's doing CimatePrediction for Team MacNN.

Z