Sony GDM-400PS - Manual (Page 21)

Additional Information
Symptom Check these items
Color is not uniform • Degauss the morütor (page 15).
If you place equipment which generates a magnetic field, such as a loudspeaker, near the
moivitOr, or you change the direction of thé monitor, color may lose uniformity.
The degauss function demagnetizes the metal frame of the CRT to obtain a neutral field for
uniform color reproduction. If a second degauss cycle is needed, allow a mirümum interval
of 20 minutes for the best result.
• Adjust the landing (pages 13 -14).
You cannot adjust the monitor
with the buttons on the front
panel
• If the control lock function is set to on, set it to off using the OPTION OSD (page 16).
White does not look white • Adjust the color temperature (pages 12 -13).
• Check that the 5 BNCs are connected in the correct order (from left to right: Red-Green-
Blue-HD-VD) (page 6).
Screen image is not centered or • Press the ASC button (page 7).
sized properly • Adjust the size or centering (page 10).
• Sòme video modes dò not fill the screen to the edges. This problem tends to occur with
certain video boards.
Edges of the image are curved • Adjust the geometry (page 11).
White lines show red or blue
shadows at edges • Adjust the convergence (pages 13 -14).
Picture is fuzzy • Adjust the contrast and brightness (page 9).
• Degauss the monitor (page 15).
If you place equipment which generates a magnetic field, such as a loudspeaker, near the
ihonitor, or you change the direction of the monitor, color may lose uniformity.
The degauss function demagnetizes the metal frame of the CRT to obtain a neutral field for
uniform color rejjroduction. if a second degauss cycle is needed, allow a minimum interval
of 20 minutes for the best resul l.
• If red or blue shadows appear along the edges of images, adjust the convergence
(pages 13 -14).
• If the moire is cancelled, the picture may become fuzzy. Decrease the moire cancellation
effect (pages 13 -14).
Picture bounces or has wavy ; Isolale and eliminate any potential sources of electric or magnetic fields. Common causes
oscillations for this symptom are electric fans, fluorescent lighting or laser printers.
• If you have another monitor close to this monitor, increase the distance between them to
reduce the interference.
• Try plugging the monitor into a different AC outlet, preferably on a different circuit.
• Try the monitor on a different computer in a different room.
Picture.is flickering • Set the refresh rate on the computer to obtain the best possible picture by referring to the
computer’s manual.
Picture appears to be ghosting • Eliminate the use of video cable extensions and/or video switch boxes if this symptom
occurs. Excessive cable length or a weak connection can produce this s}miptom.
Wavy or elliptical (moire) • Cancel the moire (pages 13 -14).
pattern is visible The moire may be modified depending on the corinectcd computer.
• Due to the relationship between resolution, monitor dot pitch and the pitch of some image
patterns, certain screen backgrounds sometimes show moire. Change your desktop pattern.
Two fine horizontal lines • These wires stabilize the vertically striped aperture grille'(page 19). This aperture grille
(wires) are visible allows more light to pass through to the screen givirrg the Trinitron CRT more color and
brightness.
Hum is heard right after the • When the power is turned on, the auto-degauss cycle is activated. While the auto-degauss
power is turned on cycle is activated (3 seconds), a hum may be heard. The same hum is heard when the
monitor is manually degaussed. Tliis is not a malfunction.
21