Actions To Corrections Abnormal Displays - Hitachi CMP4221 User Manual

TROUBLESHOOTING (continued)
Actions to Correct Abnormal Displays (RGB Input)
Corrections d'affichage anormales RVB 1 seulement
Depending on the kind of system equipment used, images may not be displayed normally. In this case, make the adjustments suggested below. (only
for RGB)
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).
Example Figure 1
Adjustment 1) Press the MENU button. The Main Menu will be displayed.
procedure 2) Press the OK key and
3) Press the
4) Press the button to auto configuration.
When adjustment is not possible with Auto Adjust:
5) Press the MENU button. The Main Menu will be displayed.
6) Press the OK key and
7) Press the
8) Press the or
9) Perform adjustment for symptom 2 below, when the characters are blurred on the entire screen.
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).
Example Figure 2
Adjustment 1) Press the MENU button. The Main Menu will be displayed.
procedure 2) Press the
3) Press the
4) Press the button to auto configuration.
When adjustment is not possible with Auto Adjust
5) Press the MENU button. The Main Menu will be displayed.
6) Press the OK key and
7) Press the
(Displays fine patterns as characters or a vertical striped pattern over the entire screen during Clock Phase adjustment.)
8) Press or buttons to make the text appear clean across the
screen.
34
Vertical Streaks
Before adjustment.
Some characters are blurred.
button then Select Image.
SELECT button and select Auto Adjustment.
button and select Image.
SELECT button and select Frequency Mode.
buttons and search for clear characters over the entire screen.
Before adjustment
After adjustment
button and Select Image.
SELECT button and select Auto Adjustment.
button and select Image.
SELECT button and select Clock PHASE.
After adjustment.
All characters appear
crisp now.
After adjustment.
All characters are
blurred.
Figure 3
9) Press or buttons to make the text appear without flickering.
Before adjustment
After adjustment