OK, I blame it on a combination of bad eyesight and using my photos as a guide. In the photos, the brown bands looked red and the gold looked kind of brown. I had a trick of a time seeing the markings clearly enough to find R3, much less the tiny ratings markings. I’m old. Sorry.
Even so, I would hesitate to trust the logic board mask over the markings on the actual part. I've seen mask errors before that creped into production boards, although this would be unlikely here...
In any event, I opened it up again, put it under a very bright lamp and under magnification and I can confirm that the bands are: brown/green/brown/gold. This makes it 150Ω with ±5% tolerance. (My original value would be correct if I could distinguish the red spectrum easily; being somewhat colourblind doesn't help.)
I had to compare the brown on R3 to the red on R9 just to be sure I was seeing it rightly. When I work on this stuff at my office, I have a stereoscopic microscope that makes it a great deal easier to see what I'm doing. Looking at the board through the lens of a camera in so-so lighting at home simply wasn't enough for me to differentiate between the colours.
Taking this all into consideration, I should probably re-shoot the photos with better ambient lighting, lest others with similar problems run into a wall because of them.
The final verdict: R3 is 150Ω ±5%. Br/Gr/Br/Gd - says it all.
It is still the exact same resistor as R10 though, so at the worst, those with better vision could use that to guide them.
-Xious
John Walcott wrote:
My video schematic of the NES2 reads that R1 is 510 Ome, R2 is 430 Ome, & R3 is 150 Ome. Check nexst to the resistor on those hi-res photos agine, it reads 150 nexst to R3. that's 150 Ome at 5%. Thay don't use 10 or 20% enymore. Brown, or no band at all was 20%, back wen resistors were brown.