5-8.Impurity On Crt Screen - NEC MultiSync FP1370 Service Manual

5-8. Impurity on CRT Screen
Does the picture sway when the degaussing
NG
/Digital control circuit failure
/Z connector disconnected
/CL connector disconnected
OK
Confirm degaussing effect
No effect
Effect, but not enough
Make sure that the monitor is removed away from any strong magnetic field
OK
Check the voltage at the feedback resister (R4J6: GLOBALSYNC,
R4N6: TOP LEFT, R4R6: BOTTOM LEFT, R4L6:TOP RIGHT,
R4M6: BOTTOM RIGHT).
Confirm that the variable range of the voltage at the feedback
resister should be between –5.6volt and +5.6volt , when the GLOBALSYNC
(5 Items) control is varied.
OK
OK
CONTINUE1
/SW REG. failure
/Degauss coil failure
No magnetic field interference
Adjust the GlobalSync, TOP LEFT, TOP RIGHT, BOTTOM LEFT
and BOTTOM RIGHT with OSD control.
Turn the monitor face to the North, South
West and the East.
Select the degauss item on OSD, and push 'PROCEED'
NG
7-17
NG
CONTINUE2