InFocus Projector Lp840 User Manual

41 4
Loosen the three captive screws on the lamp module.
WARNINGS: 
 To avoid burns, allow the projector to cool for at least 60 minutes before 
you replace the lamp.
 Do not drop the lamp module. The glass may shatter and cause injury.
 Do not touch the glass lamp screen. Fingerprints can obscure projection 
sharpness.
 Be extremely careful when removing the lamp housing. In the unlikely 
event that the lamp ruptures, small glass fragments may be generated. 
The lamp module is designed to contain...

42
Cleaning the dust filter1
Turn off the projector and unplug the power cable. 
2
Wait 60 minutes to allow the projector to cool thoroughly.
WA R N I N G: To avoid burns, allow the projector to cool for at least 60 
minutes before you clean or replace the dust filter.
3
Remove the dust filter grill door on the side of the projector by pulling 
down on the two tabs at the grill’s top. 
4
Press the tab on the center of the dust filter and lift it off.
5
Clean the filter using a vacuum set on low power.
6...

43
AppendixProjected image sizeNOTE: Visit our website for an interactive image size calculator.
Table 1: Projection sizes: Standard lens (1.5 - 2.2:1 throw ratio)
The image offset range for the standard lens is 10:1 (100%) to 1:1 (50%). Table 2: Projection sizes: Short Fixed lens (0.8:1 throw ratio)
The optimal offset setting for the fixed focus short throw lens is 50% (on 
axis). Minimum Image Maximum Image
Distance 
(feet/m) Diagonal 
Image
(feet/m)Image 
Width 
(feet/m) Diagonal 
Image
(feet/m)Image...

44
Table 3: Projection sizes: Short Zoom lens (1.1 -1.51 throw ratio range)
The image offset range for the short throw lens is 10:1 (100%) to 1:1 (50%). Table 4: Projection sizes: Long Throw lens (2.2 - 4.2:1 throw ratio range)
The image offset range for the long throw lens is 10:1 (100%) to 1:1 (50%). Minimum Image Maximum Image
Distance 
(feet/m) Diagonal 
Image
(feet/m)Image 
Width 
(feet/m) Diagonal 
Image
(feet/m)Image 
Width 
(feet/m)
Min Distance
2/0.61.67/0.51 1.33/0.41 2.27/0.69 1.82/0.55
5/1.5...

45
Table 5:  Projection sizes: Super Long throw lens 3.9 - 7.3:1)
The image offset range for the super throw lens is 10:1 (100%) to 1:1 (50%).Minimum Image Maximum Image
Distance 
(feet/m) Diagonal 
Image
(feet/m)Image 
Width 
(feet/m) Diagonal 
Image
(feet/m)Image 
Width 
(feet/m)
Min Distance
7.5/2.31.28/0.39 1.03/0.31 2.4/0.73 1.92/0.59
25/7.6 4.28/1.3 3.42/1.04 8.01/2.44 6.41/1.95
50/15.2 8.56/2.61 6.85/2.09 16.03/4.88 12.82/3.91
75/22.9 12.84/3.91 10.27/3.13 24.04/7.33 19.23/5.86
100/30.5 17.12/5.22...

46
LED BehaviorLED color/behavior
Meaning
Power: blinking green
Te m p :  N / A
Lamp: N/AThe power switch has been toggled 
on and the software is initializing, or 
the projector is powering down and 
the fans are running to cool the lamp.
Power: blinking green (once)
Te m p :  N / A
Lamp: N/APower Save or Screen Save.
Power: solid green
Te m p :  N / A
Lamp: N/AThe power switch has been toggled 
on and the software has initialized or 
the projector has been powered off 
via the remote. 
Power: solid...

47
RS-232 commands Communication ConfigurationVisit our website for additional RS-232 settings and information.
To control this projector via RS-232, connect a null modem cable and set the 
control system serial port settings to match the following communication 
configuration: Command FormatAll commands consist of 3 alpha characters followed by a request, all 
enclosed in parentheses. The request can be a read request (indicated by a 
?) or a write request (indicated by 1 to 4 ASCII digits).
A read...

48 Error Conditions
Not all commands are supported for all projectors. If an unsupported com-
mand is issued, the command will be ignored. If a command is received that 
is not understood, a ‘?’ character will be returned indicating the command 
was not understood.LimitationsThe projector cannot respond to commands coming in at a high-rate. There-
fore, a delay must occur between commands to ensure that the command 
gets properly executed. To assure the projector can process a command, 
wait 3 seconds...

49
Function
Com-
mand
Min
Max
De-
fault
Step
Contrast CON at RW 96 160 128 1
Color Space 
0: RGB 
1: SMPTE240 
2: REC709 
3: REC601 
7: AutoCSM at RW 0 7 7
Green Gain GCG at RW 0 100 50 2
Vertical Keystone DKC at RW 78 178 128 1
Horizontal Keystone DKH at RW 78 178 128 1
Display Messages
0: disable
1: enableDMG at RW01 11
Power-up Source
0: computer 1
1: computer 2
2: video 1
3: video 2
4: video 3
5: computer 3DSC at RW 0 5 0
Startup Logo
0: blank screen 
1: default
2: capturedDSU at RW 0 2 1
Function...

50
Function
Com-
mand
Min
Max
De-
fault
Step
Time In Hours Last 
Bulb3 LastedLB3 at R 0 32766 0
Lamp Lit
0: not lit
1: litLML at R 0 1
Lamp Hours LMP at R 0 65534 0 1
Lamp Reset
0: not reset
1: resetLMR at RW 0 32766 0
Lamp Total On Time 
(All Bulbs)LMT at R 0 214748
3646
Low Power
0: disable
1: enableLPE at RW 0 1 0
Menu
0: disable
1: enableMNU at RW 0 1 0
Phase MSS at RW 0 31 18 1
Mute
0: disable
1: enableMTE at RW 0 1 0
Tracking MTS at RW def:
-128def:
+128auto 1
Function
Com-
mand
Min
Max
De-
fault...