Panasonic LCD Projector PT-L785U Operating Instructions

ENGLISH-61
Care and maintenance
The buttons on
the projector do
not function.
The picture does
not display
correctly.
Picture from
computer does
not appear.Problem Possible cause
BThe “CONTROL KEY” may be set to “OFF”. 
In order to set the “CONTROL KEY” to “ON”
without using the remote control unit, keep holding
down the ENTER button on the projector and press
the MENU button for more than 2 seconds.
BThe signal format (“TV-SYSTEM”) may not be set
correctly.
BThere may be a problem with the video tape...

#Loosen the screw by turning it
anticlockwise.
$Release the two hooks at the
top of the cable cover.
%Pull the cable cover to the
rear to remove it from the
projector.
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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 cord and other
cables into the cable cover.
%Put the Velcro through the
hole, and tape it to prevent
the cables from dropping out.
&Insert the...

ENGLISH-63
Others
Covering the connector panel 
When installing the projector to the ceiling, the accessory cable cover can be
used to cover the connectors 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 mains lead through cut-
away part S, pass the other...

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Replacing the projection lens
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 stops.
$While pressing the lens
release button, turn the
projection lens anticlockwise
again.
%Remove the projection lens.
#Insert the other projection
lens (sold separately) as far
as it will go, while matching
the projection to the groove.
$Turn the projection lens
clockwise until a click is
heard. Signal...

ENGLISH-65
Others
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...

66-ENGLISH
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 m(6´) 4.9...

ENGLISH-67
Others
Setting-up dimensions which are not given in the table can be calculated
using the formulas below.
SD (m):  Screen size (diagonal)
LW:  Projection distance for the wide lens position
LT:  Projection distance for the telephoto lens position
Model No. of projection lens Aspect ratioMethods of calculation of Projection distance (L)  Unit: mm
Zoom lens
ET-LE10
(1.3 -1.7:1)4:3
LW = 0.027xSD/0.0254-0.0523
LT = 0.0355xSD/0.0254-0.0509
16:9LW = 0.0294xSD/0.254-0.0523
LT =...

68-ENGLISH
Specifications
Power supply: 100 V - 240 V ~, 50 Hz/60 Hz
Power consumption: 380 W [During standby (when fan is
stopped): approx. 11 W, during “WEB
STANDBY” mode: approx. 40W]
Amps: 4.5 A - 2.0 A
LCD panel:
Panel size (diagonal): 1.0 type (25.4 mm)
Aspect ratio: 4:3
Micro lens array: Available
Display method: 3 transparent LCD panels (RGB)
Drive method: Active matrix method
Pixels: 786 432 (1 024 x 768) x 3 panels
Lens: Electronic zoom (1 - 1.2) / focus
F 1.7 - 2.1  f 40.7 mm - 52.8 mm
Lamp:...

ENGLISH-69
Others
HD/SYNC: TTL, automatic positive/negative polarity
compatible
VD: TTL, automatic positive/negative polarity
compatible
RGB AUDIO IN:
Single-line, 0.5 V [rms] M3 jack (Stereo MINI)
VIDEO IN: Single-line, RCA pin jack
1.0 V [p-p], 75 Ω
S-VIDEO IN: Single-line, Mini DIN 4-pin
Y 1.0 V [p-p], C 0.286 V [p-p], 75 Ω
AUDIO IN (for S-VIDEO/VIDEO):
Single-line, 0.5 V [rms] RCA pin jack x 2 (L-R)
AUDIO OUT:Single-line, 0.5 V [rms] M3 jack (Stereo MINI)
(Monitor output /stereo compatible) 
0 V...

70-ENGLISH
Appendix
*1 The “i” appearing after the resolution indicates an interlaced signal.
*2 The following symbols are used to indicate picture quality.
AA Maximum picture quality can be obtained.
A Signals are converted by the image processing circuit before picture 
is projected.
B Some loss of data occurs to make projection easier.
*3 Signals with “OK” in the “Resizing” column can be set using the
“RESIZING” command in the “POSITION” menu. (page 45)
*4 Signals that are compatible with the “FRAME...