HP 141T, 8552B, 8553B?

[Henry Kolesnik]

I just got this setup and the it seems to work OK except the that the
DISPLAY UNCAL lamp on the 8553B doesn't light when it should. Is this a
common failure that is an easy fix, any tips appreicated.
tnx
hank wd5jfr

 

[Henry Kolesnik]

The bulb shows no continuity and my sorrily xeroxed manual is missing page
6-13 where I assume DS1 is listed. Can someone please tell me the lamp
specs and whether it screws in, plugs or solder.
tnx
hank wd5jfr