ViewSonic VPW4255 manual Troubleshooting Actions to Correct Abnormal Images

TROUBLESHOOTING (continued)

Actions to Correct Abnormal Images

Depending on the kind of system equipment used, images may not be displayed normally. In this case, make the adjustments suggested below. (only for RGB2)

Symptom 1	Text displayed across the screen appears vertically streaked, with some characters blurred (figure 1).
	The display image appears flowing (figure 2) (RGB input).
	Figure 1		Vertical	Before adjustment
			streaks	Some characters
				are blurred.		After adjustment
		ABCDEFGHIJ			ABC
		abcdefgABCDEFGabcd		ABC		All characters appear
						crisp now.
Example		ABCDEFGHIJ
		abcdefgABCDEFGabcd
					ABC	After adjustment
						All characters are
						blurred.

1) Press the AUTO button on the remote control.

When adjustment is not possible with Auto Adjust

2)Press the MENU button. The Main Menu will be displayed.

Adjustment 3) Press the SELECT button and select Setup.

procedure 4)	Press the OK button. The Setup Menu will be displayed.
5)	Press the SELECT button and select Horizontal Clock.

(Display fine patterns as characters or a vertical striped pattern over the entire screen during Horizontal Clock adjustment.)

6)Press the or ADJUST buttons and search for clear characters over the entire screen.

7)When the characters are blurred on the entire screen, make the adjustment for Symptom 2 below.

•The display image may be momentarily disturbed during clock adjustment but this is not a failure.

Symptom 2

Text displayed across the screen appears blurred in its entirety (figure 2). A fine pattern flickers when displayed on the screen (figure 3).

Figure 2		Before adjustment	Figure 3	Before adjustment
	ABCDEFGHIJ	ABC
	abcdefgABCDEFGabcd
	ABCDEFGHIJ
	abcdefgABCDEFGabcd
Example		After adjustment		After adjustment

ABC

1) Press the AUTO button on the remote control.

	When adjustment is not possible with Auto Adjust
	2)	Press the MENU button. The Main Menu will be displayed.
Adjustment	3)	Press the	SELECT button and select Setup.
procedure 4) Press the OK button. The Setup Menu will be displayed.
	5)	Press the	SELECT button and select Clock Phase.
	(Display fine patterns as characters or a vertical striped pattern over the entire screen during Clock Phase adjustment.)
	6)	Press	or ADJUST buttons to make the text appear	6) Press or ADJUST buttons to make the text not
		clean across the screen.		flicker.

ViewSonic VPW4255 29