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16 TROUBLE SHOOTING
Normal phenomenon on ‘Diamondtron M
2
-CRT’ monitors
Misalignment of Aperture Grille
Due to the nature of the Diamondtron M
2
-CRT, in rare cases, a misalignment of the aperture grille may
happen by the shock or vibration caused during transportation. If a black vertical line appears on the
screen, apply a light shock to the side of the monitor with your hand. If the problem persists, follow
the procedure below.
Display a full white picture and inspect the problem area.
Display a high-white picture that covers the problem area to shoot a strong electron beam. Leave
it for a while, until the problem disappears.
Damper Wires
The two faint horizontal lines that may be visible on the screen are actually the shadows of steel
wires called
Damper Wires. All Diamondtron M
2
-CRT based monitors have these wires for structural
reasons.
A
B
HM703UT