Hitachi 32PD7800 Owners Guide - Page 52

TROUBLESHOOTING continued, Actions to Correct Abnormal Displays

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TROUBLESHOOTING (continued) Actions to Correct Abnormal Displays 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 Example Text displayed across the screen appears vertically streaked, with some characters blurred (Figure 1). (RGB input). Figure 1 Vertical streaks Before adjustment, some characters are blurred. ABCDEFGHIJ abcdefgABCDEFGabcd ABCDEFGHIJ abcdefgABCDEFGabcd ABC After adjustment, ABC all characters appear crisp now. After adjustment, AABBCC all characters are blurred. 1) Press the MENU button. The Main Menu will be displayed. 2) Press the SELECT button and select Setup. 3) Press the OK button. The Setup Menu will be displayed. 4) Press the SELECT button and select Auto Adjust. Adjustment procedure When adjustment is not possible with Auto Adjust 5) Press the MENU button. The Main Menu will be displayed. 6) Press the SELECT button and select Setup. 7) Press the OK button. The Setup Menu will be displayed. 8) 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.) 9) Press the or ADJUST buttons and search for clear characters over the entire screen. 10) 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). Figure 2 Example Before adjustment ABCDEFGHIJ abcdefgABCDEFGabcd ABCDEFGHIJ abcdefgABCDEFGabcd AABBCC After adjustment ABC Figure 3 Before adjustment After adjustment 1) Press the MENU button. The Main Menu will be displayed. 2) Press the SELECT button and select Setup. 3) Press the OK button. The Setup Menu will be displayed. 4) Press the SELECT button and select Auto Adjust. Adjustment procedure When adjustment is not possible with Auto Adjust 5) Press the MENU button. The Main Menu will be displayed. 6) Press the SELECT button and select Setup. 7) Press the OK button. The Setup Menu will be displayed. 8) 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.) 9) Press or ADJUST buttons to make the text appear clean across the screen. 9) Press or ADJUST buttons to make the text appear without flickering. 52

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52
TROUBLESHOOTING (continued)
Actions to Correct Abnormal Displays
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
Figure 1
Text displayed across the screen appears vertically streaked, with some characters blurred (Figure 1).
(RGB input).
1) Press the MENU button. The Main Menu will be displayed.
2) Press the
SELECT button and select Setup.
3) Press the OK button. The Setup Menu will be displayed.
4) Press the
SELECT button and select Auto Adjust.
When adjustment is not possible with Auto Adjust
5) Press the MENU button. The Main Menu will be displayed.
6) Press the
SELECT button and select Setup.
7) Press the OK button. The Setup Menu will be displayed.
8) 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.)
9) Press the
or
ADJUST buttons and search for clear characters over the entire screen.
10) Perform adjustment for symptom 2 below, when the characters are blurred on the entire screen.
Adjustment
procedure
Example
Symptom 2
Figure 2
Figure 3
Text displayed across the screen appears blurred in its entirety (Figure 2).
A fine pattern flickers when displayed on the screen (Figure 3).
1) Press the MENU button. The Main Menu will be displayed.
2) Press the
SELECT button and select Setup.
3) Press the OK button. The Setup Menu will be displayed.
4) Press the
SELECT button and select Auto Adjust.
9) Press
or
ADJUST buttons to make the text appear
clean across the screen.
9) Press
or
ADJUST buttons to make the text appear
without flickering.
When adjustment is not possible with Auto Adjust
5) Press the MENU button. The Main Menu will be displayed.
6) Press the
SELECT button and select Setup.
7) Press the OK button. The Setup Menu will be displayed.
8) 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.)
Adjustment
procedure
Example
ABC
B
ABCDEFGHIJ
abcdefgABCDEFGabcd
ABCDEFGHIJ
abcdefgABCDEFGabcd
Vertical
streaks
Before adjustment,
some characters
are blurred.
After adjustment,
all characters appear
crisp now.
After adjustment,
all characters are
blurred.
ABC
ABC
ABC
ABCDEFGHIJ
abcdefgABCDEFGabcd
ABCDEFGHIJ
abcdefgABCDEFGabcd
Before adjustment
After adjustment
ABC
ABC
ABC
Before adjustment
After adjustment
•
The display image may be momentarily disturbed during clock adjustment but this is not a failure.