Service manual

Troubleshooting 11
1.2.5 Geometric Distortion
START
DISPLAY THE CIRCLE−CROSSHATCH SCREEN
MEASURE THE DISTANCE BETWEEN THE
TOP AND BOTTOM OF THE IMAGE AT
SEVERAL POINTS ACROSS THE SCREEN
IS THE
DISTANCE FROM NO
TOP−TO−BOTTOM AT PERFORM THE D BOARD
ADJUSTMENTS (2.4)EACH POINT
YES
ARE THE
MEASURE THE DISTANCE FROM THE
LEFT SIDE OF THE IMAGE TO THE
RIGHT SIDE AT SEVERAL POINTS
ACROSS THE SCREEN
TOP−TO−BOTTOM
AND SIDE−TO−SIDE YES
STOP
NO
SIDE−TO−SIDE AT
REPLACE THE D BOARD (3.6)
PERFORM THE D BOARD
ADJUSTMENTS (2.4)
SECTION NUMBERS ARE IN PARENTHESES.
280mm
236 mm
DISTANCE FROM NO
DISTANCES EQUAL AT
EACH POINT
YES
ARE THE
RESPECTIVELY
236 mm AND 280 mm,
YES
STOP
NO
REPLACE THE WHOLE MONITOR
STOP
IS THE
DISTANCES EQUAL AT
TOP−TO−BOTTOM
AND SIDE−TO−SIDE
RESPECTIVELY
236 mm AND 280 mm,