Hitachi CP-X4020 Operating Manual page 72

Phenomena that may be easy to be mistaken for machine defects (continued)
Phenomenon
Pictures appear
dark.
Pictures appear
blurry.
RS-232C does
not work.
NOTE • Although bright spots or dark spots may appear on the screen, this
is a unique characteristic of liquid crystal displays, and it does not constitute or
imply a machine defect.
Cases not involving a machine defect
The brightness and/or contrast are adjusted to an
extremely low level.
Adjust the BRIGHTNESS and/or the CONTRAST settings to
a higher level using the menu function.
The ECO MODE function is working.
Select the NORMAL for the ECO MODE item in the SETUP
menu.
The lamp is approaching the end of its product
lifetime.
Replace the lamp.
Either the focus and/or horizontal phase settings are
not properly adjusted.
Adjust the focus using the focus ring, and/or the H PHASE
using the menu function.
The lens is dirty or misty.
Clean the lens referring to the section "Caring for the lens".
The SAVING function is working.
Select NORMAL for STANDBY MODE item in the SETUP
menu.
Troubleshooting
Reference
page
26
34
53, 54
18, 30
56
35
63