Panasonic PT-LB90U User Manual
Troubleshooting
Maintenance
E
NGLISH - 51
Troubleshooting
Confirm the following problem and cause.
Should any problem persist, contact an Authorized Service Center.
Problem
Cause
Page
Power does not turn on.
The power cord may not be connected securely.
z
No electric supply at the wall outlet.
z
The circuit breakers have tripped.
z
—
TEMP
z
or
LAMP indicator is lit or flashes.
The lamp unit cover has not been securely installed.
z
The control buttons are
z
LOCKED.
CONTROL PANEL
z
in the
PROJECTOR SETUP menu is invalidated.
No picture appears.
The audio signal source may not be connected properly.
z
The input selection setting may not be correct.
z
The
z
BRIGHTNESS adjustment setting may be at the minimum setting.
The signal input source may not be operating properly.
z
—
The
z
AV MUTE function may be in use.
The picture is fuzzy.
The lens focus may not have been set correctly.
z
The projector may not be at the correct distance from the screen.
z
The lens may be dirty.
z
The projector may be tilted too much.
z
Color is pale or grayish.
COLOR
z
or
TINT adjustment may be incorrect.
The input source which is connected to the projector may not be adjusted
z
correctly.
—
No sound can be
heard from the internal
speaker.
The audio signal source may not be connected properly.
z
The volume adjustment may be at the lowest possible setting.
z
A cable may be connected to the
z
VARIABLE AUDIO OUT terminal.
The remote control does
not operate.
The batteries may be weak.
z
—
The batteries may not have been inserted correctly.
z
The remote control signal receptor on the projector may be obstructed.
z
The remote control unit may be out of the operation range.
z
REMOTE CONTROLLER
z
in the
PROJECTOR SETUP menu is
invalidated.
The remote control is under a strong light such as fluorescent.
z
The control buttons
of the projector
do not operate.
CONTROL PANEL
z
in the
PROJECTOR SETUP menu is invalidated.
(If you have a loss of the remote control while the
CONTROL PANEL is
invalidated, press and hold the
MENU button for 2 seconds by pressing the
ENTER button.)
The picture does not
display correctly.
T
z
he signal format (
TV-SYSTEM, RGB/YP
B
P
R
) may not have been set
correctly.
There may be a problem with the VCR or other signal source.
z
—
A signal which is not compatible with the projector is being input.
z
Picture from a computer
does not appear.
The RGB signal cable is too long. (Limit to 10 m (32'10").)
z
—
The external video output from a laptop computer may not be correct.
z
(You may be able to change the external output settings by pressing the
[Fn] + [F3] or [Fn] + [F10] keys simultaneously. The actual method varies
depending on the type of computer; refer to the documentation provided
with your computer for further details.)
The projector cannot be
controlled through serial
terminal.
EMULATE
z
in the
PROJECTOR SETUP menu is not set correctly. (If you
fail to select your product series, ask your dealer for repair. )
Note
If the projector does not operate normally after the above remedies are taken, contact an Authorized Service Center.
z