Panasonic LCD Projector PT-L785U Operating Instructions

							ENGLISH-51
Adjustments and settings
Setting up the security function
This projector is equipped with a security function. A password input screen
can be displayed, or a company URL can be set up and displayed at the
bottom of the projected image. A logo also can be displayed before projection.
Press the Ior Hbutton on the
projector or remote control unit to
select “SECURITY”, then press the
Gbutton.
(When you use the “SECURITY”
function for the first time)
Press the F, H, G, I, F, H, G
and Ibuttons in order, then press
the ENTER button.
(When a password change has
been made before)
Type in the changed password, then
press the ENTER button.
INVALID
OFF
OFFVALID
ON
ONSECURITY
PASSWORD SETTING
CHANGE PASSWORD
TEXT DISPLAY
CHANGE TEXT
LOGO DISPLAY
LOGO CLEAR
LOGO CAPTURE
PASSWORD SETTING
The password input screen can be
displayed when the power is turned
on. All of the controls other than the
POWER button are disabled unless
the password is entered correctly.
VALID
“PASSWORD SETTING” is
enabled.
INVALID
“PASSWORD SETTING” is
disabled. The password input
screen will not be displayed when
the power is turned on.
CHANGE PASSWORD
Passwords can be changed. Press
the ENTER button to display the
“CHANGE PASSWORD” screen.
#Set a password by pressing the
F,G,I, and Hbuttons. (A
maximum of 8 buttons can be
set.)
$Press the ENTER button.
%Enter the password again for
confirmation.
&Press the ENTER button.
Password change will be
completed.
PASSWORD
OK:[ENTER]   CANCEL:[MENU]
INVALID
OFF
OFFVALID
ON
ONSECURITY
PASSWORD SETTING
CHANGE PASSWORD
TEXT DISPLAY
CHANGE TEXT
LOGO DISPLAY
LOGO CLEAR
LOGO CAPTURE
SELECT:[^][@][{][}]
ADJUST:[{][}]ENTER:[ENTER]
  ESC:[MENU]
NEW
FINISH:[ENTER]   CANCEL:[MENU]
CONFIRM 
						

							52-ENGLISH
TEXT DISPLAY
You can set text to be displayed at
the bottom of the projected image at
all times.
ON
“TEXT DISPLAY” is enabled.
OFF
“TEXT DISPLAY” is disabled.
CHANGE TEXT
The text which is displayed when
“TEXT DISPLAY” is set to “ON” can
be changed.
Press the ENTER button to display
the “CHANGE TEXT” screen.
#Press the F, G, Iand H
buttons to select the letters, then
press the ENTER button. 
(You can enter 20 letters
continuously.)

←
Moves cursor to left.
→
Moves cursor to right.
DELETE
Deletes a letter on the cursor.
ALL DELETE
Deletes all the letters.
$Press the F, G, Iand H
buttons to select “OK”, then press
the ENTER button.
CSelect “CANCEL” to cancel the
change.
NOTE:
BThe entered password will
appear as   . It will not be
displayed on the screen.
BIf you enter the wrong
password, the letters
“PASSWORD” and “NEW” will
become red. Enter the correct
password again.
'
#+/¡ÍΦ¨
 $(,—ÌŸ´€y›
}Š!%)-ÏÈ¢|»§©
0123456789:;?@ABCDEFGHI¼Š
áyyyàyyyyyyyy%&-&5&yyyyyy--
%&-&5&

yyyyyyyyyyyyy0,yyyyyyyy
$/$&-%#($#



#($#
Cursor
Editing items Above: Setting before change
Below: Setting after change 
						

							ENGLISH-53
Adjustments and settings
LOGO DISPLAY
A logo can be displayed before
projection.
ON
“LOGO DISPLAY” is enabled.
OFF
“LOGO DISPLAY” is disabled.
LOGO CLEAR
Captured logo data can be cleared.
Press the ENTER button to display
the confirmation screen, and then
select “OK”.
LOGO CAPTURE
A logo can be captured from the
picture being projected. Press the
ENTER button to display the
capture adjustment screen.
#Press the FGIand Hbuttons
to move the capturing frame to
the area you want to capture.
$Press the ENTER button.
CThe letters “CAPTURE ...” and
the progress status will be
displayed while logo capture is
being carried out.
POSITION:[{ } ^ @]
CAPTURE:[ENTER]
CANCEL:[MENU]
Capturing frame
NOTE:
BThe size of the capturing frame
varies depending on the
signals being input.
BFine images such as landscapes
may be unable to be captured.
BOnly RGB signals can be
captured. (Except 480i, 576i,
480p, 576p, 1 080/60i, 
1 080/50i and 720/60p. Refer
to page 70 for details.)
BImages with 512 x 384 pixels
can be captured.
BIt is recommended that you input
XGA signals, and set
“KEYSTONE” to “0” when
carrying out “LOGO CAPTURE”.
NOTE:
BThe letters which cannot be
input will be displayed in gray,
and cannot be selected in
“CHANGE TEXT”. 
						

							54-ENGLISH
When the TEMP indicator and the
LAMP indicator are illuminated
There are two indicators on the control panel of the projector which give
information about the operating condition of the projector. These indicators
illuminate or flash to warn you about problems that have occurred inside the
projector, so if you notice that one of the indicators is on, turn off the power
and check the table below for the cause of the problem.
Problem Indicator
display
The surrounding temperature or
the temperature inside the
projector has become unusually
high.Illuminated (red)
(Lamp unit on)
BThe ventilation holes may be covered.
BThe ambient temperature in the place of use may be too high.
BThe air filter may be blocked.
BUncover the ventilation holes.
BSet up the projector in a place where the temperature is
between 0 °C (32 °F) and 40 °C (104 °F) and the humidity is
between 20% and 80% (with no condensation). [If you set the
“FAN CONTROL” to “HIGH” (page 48), set up the projector in a
place where the temperature is between 0 °C (32 °F) and 35 °C
(95 °F) and the humidity is between 20% and 80% (with no
condensation).]
BTurn off the MAIN POWER switch by following the procedure
on page 26, and then clean the air filter (refer to page 56).
Possible
cause
RemedyThe surrounding temperature or
the temperature inside the
projector has become
dangerously high, causing the
lamp unit to automatically shut
off.Flashing (red)
(Lamp unit off) TEMP indicator
LAMP indicator
TEMP indicator
RGB VIDEO AUTO SETUP SHUTTERINPUT
TEMP
LAMP RGB INPUT 
						

							ENGLISH-55
Care and maintenance
Remedy
Problem Indicator
display
Flashing (red)
It is nearly time to
replace the lamp
unit.Illuminated (red)
An abnormality has been detected in the lamp
circuit.
BDoes “REPLACE
LAMP” appear on
the screen after
the projector is
turned on?
BThis occurs when
the operation time
for the lamp unit is
nearing 1 350
hours (when
“LAMP POWER”
has been set to
“HIGH”). Ask your
dealer or an
Authorized
Service Center to
replace the lamp
unit.
Possible
cause
BThe power may
have been turned
on straight away
after it was turned
off.
BWait for a while
until the lamp unit
cools down before
turning the power
back on again.BThere may be an
abnormality in the
lamp circuit.
BTurn off the MAIN
POWER switch by
following the
procedure given
on page 26, and
then contact an
Authorized
Service Center. LAMP indicator
NOTE:
BBe sure to turn off the MAIN POWER switch by following the procedure
given in “Turning off the power” on page 26 before carrying out any of
the procedures in the “Remedy” column.
BIf the power turns off after the TEMP indicator has illuminated, it means
an abnormality has occurred. Please contact an Authorized Service
Center so that the necessary repairs can be made. 
						

							56-ENGLISH
Cleaning and replacing the air filter
If the air filter becomes clogged with dust, the internal temperature of the
projector will rise, the TEMP indicator will illuminate and the projector’s
power will turn off (the TEMP indicator will flash after the power is turned off).
The air filter should be cleaned every 100 hours of use.
NOTE:
BPlace the projector on top of a
soft cloth so that it will not
become scratched.
NOTE:
BBe sure to install the air filter
before using the projector. If
the projector is used without
the air filter installed, dust and
other foreign particles will be
drawn into the projector, and
malfunctions will result.
BIf the dust cannot be removed
by cleaning, it is time to
replace the air filter. Please
consult your dealer.
Furthermore, if the lamp unit is
being replaced, replace the air
filter at this time also. #Turn off the MAIN POWER
switch and disconnect the
power cord plug from the wall
outlet.
Turn off the MAIN POWER switch
according to the procedure given
in “Turning off the power” on page
26 before disconnecting the power
cord plug from the wall outlet.
$Gently turn the projector
upside down.
%Remove the air filter.
Put your fingernails under the air
filter and pull the air filter out of
the projector.&Clean the air filter.
Soak the air filter in water and
wash out dirt by hand.
'Dry the air filter and install it to
the projecter.
Air filter
NOTE:
BDo not use detergent.
BBe careful not to separate the
air filter cover from the frame
when washing the air filter. 
						

							ENGLISH-57
Care and maintenance
Replacing the lamp unit
Warning
The lamp unit should only be
replaced by a qualified
technician.
When replacing the lamp, allow it
to cool for at least one hour
before handling it.
BThe lamp cover gets very hot,
and contact with it can cause
burns.
Notes on replacing the lamp
unit
BThe light generating lamp is
made of glass, so dropping it or
allowing it to hit hard objects may
cause it to burst. Be careful when
handling the lamp.
BDispose of the removed old lamp
with the same care that would be
taken with a fluorescent light.
BA Phillips screwdriver is
necessary for removing the lamp
unit.
Lamp unit replacement
period
The lamp is a consumable product.
Even when the full life of the bulb
has not been exhausted, the
brightness of the light will gradually
decline. Therefore periodic
replacement of the lamp is
necessary.
The intended lamp replacement
interval is 1 500 hours, but it is
possible that the lamp may need to
be replaced earlier due to variables
such as a particular lamp’s
characteristics, usage conditions
and the installation environment.
Early preparation for lamp
replacement is encouraged.
The lamp will automatically shut off
after approximately 10 minutes
when 1 500 hours of use have been
reached because of a much greater
chance of it exploding after this
time.
NOTE:
BThe projector is not supplied
with a replacement lamp unit.
Please ask your dealer for
details. Lamp unit product 
no.: ET-LA785
CAUTION:
BDo not use any lamp unit other
than the one with the product
number indicated above.NOTE:
BThe usage hours explained
above are for when “LAMP
POWER” in the “OPTION”
menu has been set to “HIGH”.
If “LAMP POWER” is set to
“LOW”, the brightness of the
lamp will be less and life of the
lamp can be extended.
BWhile 1 500 hours is the
intended replacement interval,
it is not a period of time
covered by warranty. 
						

							58-ENGLISH
Lamp unit replacement procedure
LAMP indicator On-screen display
Illuminates red during
image projection and
standby mode. Displayed for 30
seconds. Pressing any
button will clear the
display. More than 1 350 hours
Remains displayed until
any button is pressed. More than 1 500 hours
NOTE:
BIf the lamp usage time has passed 1 500 hours (when “LAMP POWER”
has been set to “HIGH”), the projector will switch to standby mode after
approximately 10 minutes of operation. The steps )to 
.on the next
page should thus be completed within 10 minutes.
#Turn off the MAIN POWER
switch according to the
procedure given in “Turning off
the power” on page 26, and
then disconnect the power
cord plug from the wall outlet
and check that the area around
the lamp unit has cooled down.
$Use a Phillips screwdriver to
turn the air outlet port fixing
screws at the back of the
projector, and then open the air
outlet port.%Use a Phillips screwdriver to
loosen the two lamp unit fixing
screws until the screws turn
freely. Then hold the handle of
the lamp unit and gently pull it
out from the projector.
&Insert the new lamp unit while
making sure that the direction
of insertion is correct, and then
use a Phillips screwdriver to
securely tighten the lamp unit
fixing screws. Air outlet port
Handle
Air outlet port fixing screwsLamp unit fixing screws 
						

							ENGLISH-59
Care and maintenance
+Press the Gbutton and select
the “LAMP RUN TIME” by
pressing theForGbutton.
,Press and hold the ENTER
button for approximately 3
seconds.
The “LAMP TIME RESET” will be
displayed.
-Select “OK” by pressing the 
I
or H
button and press the
ENTER button.
This will reset the cumulative
usage time for the lamp unit to
zero. The lamp unit will
automatically shut off, and the
projector will go in the standby
mode. 'Close the air outlet port, and
then use a Phillips screwdriver
to securely tighten the air
outlet port fixing screws.
(Insert the power cord plug into
the wall outlet and then press
the MAIN POWER switch.
)Press the POWER button so
that a picture is projected onto
the screen.
*Press the MENU button to
display the menu screen, and
select “OPTION” by pressing
the I
or H
button.
OPTIONOSD
AUTO SEARCH
AUTO SIGNAL
RGB2 SELECT
RGB/YP
BPRVGA60/480p
BACK COLOR
CINEMA REALITY
NEXT PAGE @OFF
OFF
OFF
INPUT
RGB
VGA60
BLUE
OFFON
ON
ON
OUTPUT
YPBPR480p
BLACK
ON
SELECT:[^][@]
ADJUST:[{][}] ESC:[MENU]
10 H
OPTIONPREVIOUS PAGE ^
FRONT/REAR
DESK/CEILING
FAN CONTROL
LAMP POWER
LAMP RUN TIME
FUNC1
CONTROL KEY
SET ID
AUTO POWER OFF   FRONT
DESK
STANDARD
LOW
MUTE
OFFREAR
CEILING
HIGH
HIGH
KEYSTONE
ON
SELECT:[^][@]
ADJUST:[{][}]ENTER:[ENTER]
ESC:[MENU]DISABLEALL
Power OFF
OKCANCEL
LAMP TIME RESET
NOTE:
BBe sure to install the lamp unit
and the air outlet port securely.
If they are not securely
installed, it may cause the
protection circuit to operate so
that the power cannot be
turned on.
NOTE:
BIf “CANCEL” is selected in step
-, the operation for resetting
the lamp time will be cancelled.
NOTE:
BIf the power indicator on the
projector does not illuminate red
when the MAIN POWER switch
is turned on, turn the MAIN
POWER switch off again and
check that the lamp unit and the
air outlet port are securely
installed. Then turn the MAIN
POWER switch back on. 
						

							60-ENGLISH
Before calling for service
Before calling for service, check the following points.
Problem Possible cause
Page
Power does not
turn on.
No picture
appears.
The picture is
fuzzy.
The color is
pale or grayish.
No sound can
be heard.
The remote
control unit
does not
operate.BThe power cord may not be connected.
BThe MAIN POWER switch is turned off.
BThe main power supply is not being supplied to the
wall outlet.
BTEMP indicator is illuminated or flashing. 
BLAMP indicator is illuminated or flashing. 
BThe air outlet port has not been securely installed.
BThe video signal input source may not be
connected properly.
BThe input selection setting may not be correct. 
BThe “BRIGHT” adjustment setting may be at the
minimum possible setting.
BThe “SHUTTER” function may be in use.
BThe lens cover may still be attached to the lens.
BThe lens focus may not have been set correctly. 
BThe projector may not be at the correct distance
from the screen.
BThe lens may be dirty.
BThe projector may be tilted too much. 
B“COLOR” or “TINT” adjustment may be incorrect. 
BThe input source which is connected to the
projector may not be adjusted correctly.
BThe audio signal source may not be connected
properly.
BThe volume adjustment may be at the lowest
possible setting. 
B
A cable may be connected to the AUDIO OUT
connector.
BThe MUTE function may be active.
BThe batteries may be weak.
BThe batteries may not be inserted correctly.
BThe remote control signal receptor on the projector
may be obstructed.
BThe remote control unit may be out of the
operation range.–
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29
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