Canon projector LV7255 User Manual

52
6. Maintenance
6. Connect the supplied power cord, turn on the Main Power switch and turn on the projector.7. Finally, select the menu 
→ [Factory default] → [Lamp counter] to reset the lamp usage hours.
NOTE: When the lamp exceeds 2100 hours (up to 3100 hours in Quiet mode)\
 of service, the projector cannot turn on and themenu is not displayed.If this happens, press the INFO. button on the remote control for ten se\
conds to reset the lamp clock back to zero.
When the lamp time clock is reset to...

53
7. Appendix

 Troubleshooting
This section helps you resolve problems you may encounter while setting up or using the projector.
Indicator Condition
Projector Condition Note
Off
Blinking light
Steady light Green
Orange
Green
Orange 0.5 sec On,
0.5 sec Off
2.5 sec On,
0.5 sec Off
0.5 sec On,
0.5 sec Off
The main power is off
The projector is getting ready to turn on.
Off Timer is enabled.
The projector is cooling down.
The projector is turned on.
The projector is in Standby. –
W
ait for a moment.
–
W...

54
7. Appendix
Common Problems & Solutions (See also POWER/WARNING/LAMP Indicator on page  53 .)
Does not turn on
Will turn off
No picture
Picture suddenly
becomes dark
Color tone or Color
balance is unusual
Image isn’t square to
the screen
Picture is blurred
Image is scrolling
vertically, horizontally
or both
Remote control does
not work
Indicator is lit or
blinking
Cross color in RGB
mode
Whenever the projector
is turned on, a message
prompting you to clean
the filter will be dis-
played •
Check that...

55
7. Appendix
If there is no picture, or the picture is not displayed correctly.
• Power on process for the projector and the PC.
Be sure to connect the RGB cable between the projector and the computer before turning on the computer.
There are some notebook PCs, which do not output signal unless there is a projector or monitor conn\
ected first.
NOTE: You can check the horizontal frequency of the current signal in the projector’s menu under Information.  If it reads
“0kHz”, this means there is no signal...

56
7. Appendix
 Specifications
This section provides technical information about the projectors performance.
Model Number LV-7255
Optical
LCD Panel 0.7 p-Si TFT active-matrix with Micro Lens Array (Aspect 4:3)
Resolution 1024  
 768 pixels* native, up to UXGA with scaling technology
Lens Manual zoom and manual focus
F1.6 - 2.5   f=17.7 - 28.3 mm
Lamp 200W DC lamp (150W Quiet mode)
Brightness 2500 lm
Uniformity 85%
Image Size (Diagonal) 25 to 300
Projection Distance 0.9 m to 7.6 m / 3.1 to 25.0...

57
7. Appendix
Mechanical
Installation Orientation Front / Rear / Ceiling mounted / Rear, Ceiling mounted
Dimensions 11.7 (W) 
4.3 (H) 
10.8 (D) / 296mm (W) 
110mm (H) 
273mm (D)
(not including protrusions)
W eight 7.3 lbs / 3.3 kg
F an Noise 35 dB (Normal mode), 30dB (Quiet mode)
Environmental Considerations Operational Temperatures : 41 ° to 95 °F (5 ° to 35 °C),
20% to 80% humidity (non-condensing)
Storage Temperatures : 14 ° to 122 °F (-10 ° to 50 °C),
20% to 80% humidity (non-condensing)...

58
7. Appendix
 Cabinet Dimensions
L  AUDIO IN  R
AUDIO OUTL  AUDIO IN  RSERVICE PORT AUDIO INMONO
MONO
ANALOG IN -
1 ANALOG IN-
2VIDEO
 IN
S -
VIDEO
IN
PUSH
MENU
BACKW ARNINGPOWERAUTO PCINPUT
VOL-VOL+LAMP
296 (11.7)
273 (10.8)
73 (2.9)
110 (4.3)
64 (2.5)
Lens center Lens center
Unit: mm (inch) 

59
Mini D-Sub 15 Pin Connector
 Pin Assignments of D-Sub ANALOG Input Connector
Signal Level
Video signal : 0.7Vp-p (Analog)
Sync signal : TTL level
11
15 12 14 13 6
54321
10 7 98
7. Appendix
* Only ANALOG-1 input connector supported.
Pin No. RGB Signal (Analog) YCbCr Signal
1 Red Cr
2Green or Sync on Green Y
3Blue Cb
4Ground
5Ground
6Red Ground Cr Ground
7Green Ground Y Ground
8Blue Ground Cb Ground
9No Connection
10 Sync Signal Ground
11 Scart Sync*
12 Bi-directional DATA (SDA)*
13Horizontal Sync or...

60
7. Appendix
 Compatible Input Signal List
Signal Resolution Frequency H. Refresh Rate
( Dots ) ( kHz ) ( Hz )
NTSC – 15.73 60
PAL– 15.63 50
PAL60 – 15.73 60
SECAM – 15.63 50
VESA 640 
480 31.47 59.94
IBM 640 
480 31.47 60
MAC 640 
480 34.97 66.67
MAC 640 
480 35 66.67
VESA 640 
480 37.86 72.81
VESA 640 
480 37.5 75
IBM 640 
480 39.38 75
VESA 640 
480 43.27 85.01
IBM 720 
350 31.47 70.09
IBM 720 
350 39.44 87.85
IBM 720 
400 39.44 87.85
VESA 800 
600 35.16 56.25
VESA 800 
600 37.88 60.32
VESA 800 
600...

61
7. Appendix
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457 -
-
1.0m
(3.2) 1.2m
(4.1) 1.5m
(4.9) 1.7m
(5.8) 2.0m
(6.6) 2.3m
(7.4) 2.5m
(8.3) 2.8m
(9.1)...