HP 8560E Service Manual page 636

12.Press ,
DISPLAY MORE 1 OF 2
panel knob, verify the dc level of the signal at TP9 adjusts about
30 Vp-p.
13.Verify that the front panel intensity adjustment, when used with the
A17R21 Z FOCUS, changes the peak-to-peak voltage at TP9 by 25 V.
Access the intensity adjustment by pressing
and turning the front panel knob.
14.Set front panel intensity to minimum. Set A17R21 Z FOCUS and
A17R26 X FOCUS fully counterclockwise. Verify that the
peak-to-peak voltage at TP9 is about 40 Vp-p (due to X-dynamic
focus circuit).
15.If circuit operation seems correct, the A18V1 CRT is probably at
fault.
Chapter 12
Display/Power Supply Section
, and . While turning the front
FOCUS
DISPLAY
Focus Problems
, ,
INTENSITY
635