Traces comes on full bright and intensity control has little affect.
Manual indicates ther should be .4V on pin 3 of U1 but I get -.61V.
Pin 7 reads -.176V which baffles me as the schematic shows 3 and 7
shorted together. My thinking is that U1 is bad.

Any thoughts?

Thanks much.

Ron
Raleigh, NC

"ronspencer" wrote in message
...
Traces comes on full bright and intensity control has little affect.
Manual indicates ther should be .4V on pin 3 of U1 but I get -.61V.
Pin 7 reads -.176V which baffles me as the schematic shows 3 and 7
shorted together. My thinking is that U1 is bad.

Any thoughts?

Thanks much.

Ron
Raleigh, NC


According to my 1740A manual and U1
pin 7 is +15V and pin 3 is non-inv i/p

electronic hints and repair briefs , schematics/manuals list on
http://homepages.tcp.co.uk/~diverse