HP Laserjet Series II problems

Archived from groups: comp.sys.hp.hardware (More info?)

Hi,
I've been getting intermittent "50 SERVICE" errors on my HP Laserjet
Series II. The fact that they don't happen all the time, and they
tend to go away if I switch the printer off for a while, suggested to
me that it could be the ac power board.

I decided to test the resistance of the fuser lamp anyway - as
suggested by pages on the web - and I found the resistance across the
lamp to be 8.3 ohms. On the web pages I read it says it should read
around 2 ohms, or another says less than 5 ohms.

What I'd like to know is, is 8.7 ohms a big enough deviation from the
norm, to suspect that the lamp may be the culprit rather than the
board?

Any help would be appreciated.

Thanks,
Jordan

P.S. I'm on 240V power if that makes a difference