Panasonic LCD Projector PT-L785U Operating Instructions

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Preparation
Notes on use
In order to get the best picture quality
Draw curtains or blinds over any windows and turn off any lights near the
screen to prevent outside light or light from indoor lamps from shining onto
the screen.
Do not touch the surfaces of the lens with your bare hands.
If the surface of the lens becomes dirty from fingerprints or anything else, this
will be magnified and projected onto the screen. Moreover, when not using
the projector, retract the lens and then cover it with the lens cover.
Screen
Do not apply any volatile substances which may cause discoloration to the
screen, and do not let it become dirty or damaged.
Lamp
The lamp may need to be replaced earlier due to variables such as individual
lamp characteristics, usage conditions and the installation environment,
especially when the projector is subjected to continuous use for more than
10 hours or the power is frequently turned on and off, as the operations that
prevent blackening of the bulb (the action of the halogen cycle) do not work
enough during short periods of time.
Liquid crystal panel
The liquid crystal panel of the projector is built with very high precision
technology to provide fine picture details. Occasionally, a few non-active
pixels may appear on the screen as fixed points of blue, green or red.
Please note that this does not affect the performance of your LCD. 
						

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Location and function of each part
Projector 
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#Projector control panel(page 14)
$Speaker
%Connector panel (page 16)
&MAIN POWER switch (pages 24 and 26)
'Power input socket (AC IN) (page 24)
The accessory power cord is connected here.
Do not use any power cord other than the accessory power cord.
(Air inlet ports
Do not cover these ports.
)Air filter (page 56)
*Front adjustable legs(L /R) (page 25)
+Leg adjuster buttons(L /R) (page 25)
These buttons are used to unlock the front adjustable legs. Press to adjust
the angle of tilt of the projector.
,Remote control signal receptor (page 22)
-Focus ring (page 25)
.Lens cover
/Projection lens
0Lens release button (page 64)
This button is used when using a projection lens that is sold separately. 
						

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Preparation
#Remote control signal receptor (page 22)
$Lamp unit holder (page 57)
%Air outlet port
Do not cover this port.
&Carrying handle
'Security lock 
This can be used to connect a commercially-available theft-prevention
cable (manufactured by Kensington). This security lock is compatible with
the Microsaver Security System from Kensington.
WARNING
Do not place your hands or other objects close to the air outlet port.
BHeated air comes out of the air outlet port. Do not place your hands or
face, or objects which cannot withstand heat close to this port, otherwise
burns or damage could result.
Projector 
NOTE:
BDuring projection of an image, the cooling fan will operate, emitting a
small noise as it operates. Turning the lamp on or off will cause this
noise to increase a little.
BBy using the “OPTION” menu to set “LAMP POWER” to “LOW”, the
operating sound of the fan can be reduced. (Refer to page 48.)
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Remote control unit
RGB VIDEO AUTO SETUP
ON(G) STANDBY(R)
ENTER MENU POWERSHUTTER INPUT
TEMP
LAMP RGB INPUT
–  FOCUS  +
–
   ZOOM   +
VIDEORGB
ALL SET
A
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#Power indicator (pages 24, 26 and 27)
This indicator illuminates red when the MAIN POWER switch is turned on,
and illuminates green when the power is turned on and a picture starts to
be projected.
When the projector is in “WEB STANDBY” mode, this indicator flashes slowly
in red.
$RGB INPUT indicator (page 27)
This indicator illuminates when a signal is input into the connector that is
selected with the input select buttons.
%LAMP indicator (page 55)
This indicator illuminates when it is time to replace the lamp unit. It flashes
if a circuit abnormality is detected.
&INPUT (RGB, VIDEO) buttons (page 25)
These buttons are used to select the input signals. When “AUTO SEARCH” in the
“OPTION” menu is set to “ON”, the input signal will be detected and selected
automatically by pressing this button for a few seconds. (Refer to page 47.)
'TEMP indicator (page 54)
This indicator illuminates if an abnormally high temperature is detected inside
the projector or around it. If the temperature rises above a certain level, the
power supply will be turned off automatically and the indicator will flash.
(SHUTTER button (page 29)
This button is used to momentarily turn off the picture and sound. 
)ENTER button (page 38)
This button is used to accept and to activate items selected in the on-
screen menus.
Projector control panel 
						

							ENGLISH-15
Preparation
*When in computer operating mode, this button on the remote control unit
functions differently. (page 33)
*Arrow (FGI
and H
) buttons (page 37)
These buttons are used to select and adjust items in the on-screen menus.
*When in computer operating mode, these buttons on the remote control
unit function differently. (page 33)
+MENU button (pages 34 and 37)
This button is used to display the menu screens. When a menu screen is
being displayed, this button can be used to return to a previous screen or
to clear the screen.
,ZOOM +/- buttons (page 25)
These buttons are used to adjust the size of the projected image.
-FOCUS +/- buttons (page 25)
These buttons are used to adjust the focus of the projected image.
.AUTO SETUP button (pages 25 and 28)
If this button is pressed while a picture is being projected, the projection settings
will be adjusted automatically in accordance with the signal being input.
/POWER button (pages 24 and 26)
These buttons are used to turn the power on and off when MAIN POWER
is turned on.
(For the remote control unit, the “  ” button is for turning on the power and
the “    ” button is for turning off the power.)
0Laser emitter (page 32)
1Infrared emitter (page 22)
2Click button (page 33)
This button can be used when the operating mode select switch is moved
to the left (Computer).
3STD (standard) button (page 38)
This button is used to reset the projector adjustment values to the factory
default settings.
4FUNC1 button (pages 43, 46 and 49)
This button can be used for 1) switching on and off the sound volume and
2) entering into the keystone distortion correction mode. Adjust “FUNC1”
in the “OPTION” menu to select which you wish to use.
5LENS button (page 31)
This button is used to display the zoom and focus adjustment screen.
6Operation indicator (page 32)
This indicator illuminates while a laser beam is being emitted (while the LASER
button is being pressed). It flashes when any other buttons are being pressed.
7LASER button (page 32)
A beam of laser light is emitted while this button is being pressed. This
laser beam can be used as a pointer to point to something on the screen.
8FREEZE button (page 29)
This button is used to momentarily freeze projection so that a still picture is displayed.
9D.ZOOM +/- buttons (page 30)
These buttons are used to enlarge the projected image.
(continued on next page) 
						

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Connector panel
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#Wired LAN connector
This connector is used to connect a personal computer to the projector in
order to externally control the projector. (10 Base-T/100 Base-TX)
Refer to the “Network Function Edition” operating instructions for details.
$SERIAL connector (pages 20, 21 and 72)
This connector is used to connect a personal computer to the projector in
order to externally control the projector. (RS-232C compatible)
%RGB1 IN connector (pages 20 and 21)
This connector is used to input RGB signals and YP
BPRsignals. :VOLUME +/- buttons (page 30)
These buttons are used to adjust the volume of the sound that is output
from the projector’s built-in speakers and AUDIO OUT connector. Refer to
page 46 for details on how to adjust the volume using the buttons on the
projector control panel.
;ID SET/ALL button (page 23)
These buttons are used to set the projector ID number into the remote
control unit when using multiple projectors with a single remote control
unit.

						

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Preparation
&RGB2 IN/RGB OUT connector (pages 20, 21 and 47)
This connector is used to input or output RGB signals and YP
BPRsignals.
Adjust “RGB2 SELECT” in the “OPTION” menu to select whether you want
input or output with this connector.
'DVI-D IN connector (page 21)
This connector is used to input DVI-D signals.
(AUDIO OUT connector (pages 20 and 21)
This connector is used to output the audio signals which are input to the
projector. If audio equipment is connected to this connector, no sound will
be output from the built-in speakers.
)S-VIDEO IN connector (pages 20 and 45)
This connector is used to input signals from a S-VIDEO-compatible
equipment such as a video deck. The connector is S1 signal compatible,
and it automatically switches between 16:9 and 4:3 aspect ratios in
accordance with the type of signal being input.
*AUDIO IN L-R connectors (for S-VIDEO/VIDEO) (page 20)
Only one system is provided, so connect the appropriate connectors when
using S-VIDEO or VIDEO.
+REMOTE connector (page 71)
This connector is used to control the projector from the remote control set
up in wired mode.
,RGB3 IN connector (pages 20 and 21)
This connector is used to input RGB signals and YP
BPRsignals.
-RGB AUDIO IN connector (pages 20 and 21)
Only one system is provided, so connect the appropriate connector when
using RGB1, RGB2 or RGB3.
.VIDEO IN connector (page 20)
This connector is used to input video signals from a video equipment such
as a video deck. 
						

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Setting-up
Projection methods
In way of installing projector, any one of the following four projection methods
are used. Select whichever projection method matches the setting-up
method. (The projection method can be set from the “OPTION” menu. Refer
to page 48 for details.)
BFront-desk projectionBFront-ceiling projection
BRear-desk projection
(Using a translucent screen)BRear-ceiling projection
(Using a translucent screen)
Menu items Setting
FRONT
DESK FRONT/REAR
DESK/CEILINGMenu items Setting
FRONT
CEILING FRONT/REAR
DESK/CEILING
Menu items Setting
REAR
DESK FRONT/REAR
DESK/CEILINGMenu items Setting
REAR
CEILING FRONT/REAR
DESK/CEILING
NOTE:
BYou will need to purchase the separate ceiling bracket (ET-PK780)
when using the ceiling installation method.
BIf you set up the projector vertically, it may cause
damage to the projector.
B
It is recommended that you set up the projector
in a place that is tilted at less than 
±30°. Setting
up the projector in places that are tilted at more
than 
±30°may cause malfunctions. 
						

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Getting started
L
L
SH
SW
25 mm
(-31/32˝)
L: Projection distance
SH: Image height
SW: Image width Top edge of screen
Screen
Bottom edge of screen
Screen
NOTE:
BThe dimensions in the table above are approximate.
BIf you use the projection distance for the 16:9 screen,
the 4:3 projection image overflows the screen at the top
and bottom.
B
For details about projected image distances, refer to page 75.
Projector position
1.01 m(40˝) 0.61 m(2´) 0.81 m(2´8˝) 1.6 m(5´2˝) 2.0 m(6´6˝)
1.27 m(50˝) 0.76 m(2´6˝) 1.02 m(3´4˝) 2.0 m(6´6˝) 2.6 m(8´6˝)
1.52 m(60˝) 0.91 m(3´) 1.22 m(4´) 2.4 m(7´10˝)3.1 m(10´2˝)
1.77 m(70˝) 1.07 m(3´6˝) 1.42 m(4´8˝) 2.8 m(9´2˝)3.6 m(11´9˝)
2.03 m(80˝) 1.22 m(4´) 1.63 m(5´4˝) 3.2 m(10´5˝)4.2 m(13´9˝)
2.28 m(90˝) 1.37 m(4´6˝) 1.83 m(6´) 3.6 m(11´9˝)4.7 m(15´5˝)
2.54 m(100˝) 1.52 m(5´) 2.03 m(6´8˝) 4.0 m(13´1˝)5.3 m(17´4˝)
3.81 m(150˝) 2.29 m(7´6˝) 3.05 m(10´) 6.1 m(20´)7.9 m(25´11˝)
5.08 m(200˝) 3.05 m(10´) 4.06 m(13´4˝) 8.1 m(26´6˝)10.6 m(34´9˝)
6.35 m(250˝) 3.81 m(12´6˝) 5.08 m(16´8˝) 10.1 m(33´1˝)13.3 m(43´7˝)
7.62 m(300˝) 4.57 m(15´) 6.10 m(20´)16.0 m(52´5˝)
Projection distances*
Screen size (4:3)
Diagonal
lengthHeight 
(SH)Width 
(SW)Projection distance (L)
Wide 
(LW)Telephoto 
(LT)
12.2 m(40´)
*For standard lens which is supplied with the projector. Refer to pages 65 –
67 for details on the projection distances for the optional lenses. 
						

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Connections
Notes on connections
BRead the instruction manual for each peripheral device carefully before connecting it.
BTurn off the power supply for all peripheral devices before making any connections.
BIf the cables necessary for connection are not included with the peripheral device or
available as an option, you may need to prepare a proper cable for the device concerned.
BIf there is a lot of jitter in the video signal, the projected image may flicker. In such
cases, it will be necessary to connect a TBC (time base corrector).
BRefer to the list on page 70 for details on compatible signals which can be input to
the projector.
BOnly one audio system circuit is available for each of the AUDIO IN L-R connectors for
S-VIDEO/VIDEO signals and the RGB AUDIO IN connector, so if you wish to change
the audio input source, you will need to remove and insert the appropriate plugs.
Connecting to video equipment
D-sub 15-pin (male) - BNCx5 (male) adapter cable 
Red (connect to P
Rsignal connector)
Blue (connect to P
Bsignal connector)
Green (connect to Y signal connector)
D-sub 9-pin
(male)
DVD player Audio systemVideo deck Computer for
control use
DVD player
Red (connect to P
Rsignal connector)
Blue (connect to P
Bsignal connector)
Green (connect to Y signal connector)DVD player
(with component
video connectors)
BNC/RCA adapter
NOTE:
BIf the signal cables are disconnected or if the power supply for the
computer or video deck is turned off while “D.ZOOM”(digital zoom) is
being used, this function will be cancelled.