Panasonic Projector Pt L780ntu Operating Instructions

51
Advanced Operation
Projection lens replacement
By replacing the projection lens with a lens that is sold separately, you can
change the projection distance.
#Turn the projection lens
anticlockwise until it is in
position.
$While pressing the lens
release button, turn the
projection lens anticlockwise
again.
%Remove the projection lens.
NOTE:
BWhen replacing a projection lens, make sure that the power is off (the
Power indicator illuminates green).
BDo not touch the signal connection. If any dust or...

52
Projection distance for each projection lens 
(sold separately)
Projector position
ET-LE10 (for short-distance projection)
Screen size (4:3) Projection distance (L)
Diagonal
lengthHeight (SH)Width 
(SW)Wide 
(LW)Telephoto
(LT)
1.01 m(40˝) 0.61 m(2´) 0.81 m(2´8˝) 1.1 m(3´7˝) 1.3 m(4´3˝)
1.27 m(50˝) 0.76 m(2´6˝) 1.02 m(3´4˝) 1.3 m(4´3˝) 1.7 m(5´6˝)
1.52 m(60˝) 0.91 m(3´) 1.22 m(4´) 1.6 m(5´2˝) 2.0 m(6´6˝)
1.77 m(70˝) 1.07 m(3´6˝) 1.42 m(4´8˝) 1.9 m(6´2˝) 2.4 m(7´10˝)
2.03 m(80˝) 1.22 m(4´) 1.63 m(5´4˝)...

53
Advanced Operation
ET-LE20 (for medium-distance projection)
Screen size (4:3) Projection distance (L)
Diagonal
lengthHeight (SH)Width 
(SW)Wide 
(LW)Telephoto
(LT)
1.01 m(40˝) 0.61 m(2´) 0.81 m(2´8˝) 2.1 m(6´10˝) 3.3 m(10´9˝)
1.27 m(50˝) 0.76 m(2´6˝) 1.02 m(3´4˝) 2.7 m(8´10˝) 4.2 m(13´9˝)
1.52 m(60˝) 0.91 m(3´) 1.22 m(4´) 3.2 m(10´5˝) 5.0 m(16´4˝)
1.77 m(70˝) 1.07 m(3´6˝) 1.42 m(4´8˝) 3.8 m(12´5˝) 5.9 m(19´4˝)
2.03 m(80˝) 1.22 m(4´) 1.63 m(5´4˝) 4.3 m(14´1˝) 6.8 m(22´3˝)
2.28 m(90˝) 1.37 m(4´6˝) 1.83...

54
Setting-up dimensions which are not given in the table can be calculated
using the formulas below.
If the screen size (diagonal) is SD (m), then the following formula is used to
calculate the projection distance for the wide lens position (LW) and the
projection distance for the telephoto lens position (LT).
Model No. of projection lens Aspect ratioMethods of calculation of Projection distance (L)  Unit: mm
Zoom lens
ET-LE10
(1.3-1.7:1)4:3LW=0.027xSD/0.0254-0.0523
LT=0.0355xSD/0.0254-0.0509
16:9...

55
Advanced Operation
Putting the power cord and 
remote control unit away
#Put the remote control unit
into the cable cover with the
buttons facing downward to
prevent them from being
pressed.
$Put the power cords and
other cords into the cable
cover.
%Put the Velcro through the
hole, and tape it to prevent
the cords from dropping out.
&Insert the hook 1 of the cable
cover into the mounting hole
in the projector.
'Push in the hook 2 until it
locks into place.
(Tighten the screw by turning it...

56
Using the cable cover 
When installing the projector to the ceiling, the accessory cable cover \
can be
used to cover the terminals or cords after removing the cut-away parts.
'Tighten the screw by turning it
clockwise. 
$Work the cut-away parts back and
forth several times to break the
fixing tabs. Smooth off any jagged
edges if necessary.
#Use pliers or similar to break the
perforated sections of the cut-
away parts. 
% Pass the power cord through cut-
away part S, and pass the other
cables...

57
Advanced Operation
Using the remote terminal
Using the remote terminal built into this projector, it is possible to operate the
projector from an external location from where infrared remote control signals
cannot be received, by using a remote control panel.
Pin assignment and control
Short pin 1 and pin 9 when controlling.
#Power ON/OFF
D-Sub 9-pin (female) 
external appearance
NOTE:
BThe POWER, RGB and VIDEO buttons on the remote control unit and
projector will not operate when pins 1 and 9 are...

58
Using the SERIAL connector
The serial connector which is on the side connector panel of the projector
conforms to the RS-232C interface specification, so that the projector can be
controlled by a personal computer which is connected to this connector.
Connection
NOTE:
BUse a proper communication
cable which is suitable for the
personal computer to connect the
serial connector and the personal
computer.
Pin layout and signal
names for SERIAL
connector
D-Sub9p (male)
Communication cable...

59
Advanced Operation
Control commands
The commands which the personal computer can use to control the projector
are shown in the following table.
CommandControl
ContentsRemarks
In standby mode, all commands other than
the PON command are ignored.
BThe PON command is ignored during
lamp ON control.
BIf a PON command is received while the
cooling fan is operating after the lamp
has switched off, the lamp is not turned
back on again straight away, in order to
protect the lamp. Power ON PON
Power OFF POF...

60
Indicators
There are two indicators on the control panel of the projector which giv\
e
information about the operating condition of the projector. These indica\
tors
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 t\
he power
and check the table below for the cause of the problem.
Problem Indicatordisplay
Flashing (red)
(Lamp unit on)
The surrounding
temperature or the
temperature inside
the projector...