40 3 TROUBLESHOOTING
Explanation of the Characteristics of CRTs
When the monitor is not fully warmed up, the screen may look slightly colored, e.g.
reddish or bluish. This phenomenon is due to the unstableness of the electron gun
during its warm-up period. Please wait for about 30 minutes until the monitor
stabilizes in order to gain its proper color.
Problems
3)Misconvergence of colors.
(red, green, blue)
n Others
Problems
1)The monitor beeps or hums.
2)Control Pad “ENTER key”
does not operate.
3)AUTO-SIZING button does
not operate.
4)AUTO-SIZING button does
not work properly.
Points to check with possible solutions
• Allow 30 minutes for the monitor to warm up.
• Adjust the convergence using the Convergence
feature in the ScreenManager’s Screen menu. See
page 21.
• This problem can occur when using a BNC
connection and the termination switch is set
incorrectly. The termination switch should be set to
75 Ω for connection to a single monitor.
Points to check with possible solutions
• The monitor emits a humming noise when
executing automatic degaussing at power-ON.
This is not a problem.
• The monitor beeps at any time. This is not a
problem. See page 34 for full details.
• The Adjustment Lock is probably on. To unlock:
switch off the monitor power, then hold down the
AUTO-SIZING button and switch the monitor back
on. See page 43.
• The Adjustment Lock is probably on. To unlock:
switch off the monitor power, then hold down the
AUTO-SIZING button and switch the monitor back
on. See page 43.
• The Auto-sizing function is intended for use on the
Macintosh and on IBM compatibles running
Windows. It may not work properly if either of the
following applies.
- You are running an A T -compatible PC on
MS-DOS (not Windows).
- The background color for the “wallpaper” or
“desktop” pattern is set to black.
• Some signals from graphics boards may not function
properly.