Harman/Kardon TU910 green bulb?

[willkayakforfood]

Hello,

I've recently acquired an old Harman/Kardon TU910 tuner, and it's got only one small problem that I'd like to fix, but don't know the part name/number (a little green lightbulb). I know that I can purchase a complete service manual for around $15, but since I'm in need of just one tiny part, I hope someone can simply steer me in the right direction.

One interesting feature of this tuner is the change in color of the dial scale illumination when a station is tuned in within "servo locking range"; the illumination changes from orange to green. It seems that my green light is out. In between stations, the illumination is orange, as it should be, but once I get a station tuned in, the dial scale illumination is gone.

I'm assuming this would be an easy fix if I knew the part number of the little green light that seems to have burned out. Can anyone help me here?

Thanks!