Toshiba Projector Tlp 791 User Manual

							61CONTENTS
Document
imaging camera
With the document camera operating, fully
cover the camera lens with a piece of black
paper or cloth.
1
Correcting illuminated defects
Note
Do not press ARM LIGHT and EXIT buttons simultaneously if the camera lens is not
covered. Doing so will not only erase the white spot correction data already set but also
result in parts ot the image that are properly displayed being corrected. Also be careful if
the camera input mode is not selected.
ARM LIGHT
EXIT
KEYSTONE
AUTOSET
EXIT
ON / STANDBY
VOL / ADJ
ENTER
MENU
INPUT
FANTEMPLAMPON
2
OVERLAY
CAMERA
ARM LIGHTLOCKW.BALANCE
CAMERAGAIN
FOCUS
Press ARM LIGHT on the camera control panel
and EXIT on the projector’s control panel
simultaneously.
You can not use the remote control buttons.
2
Camera control panelControl panel
(Main unit side)
Press both sides
Camera lens
For the CCD image sensor used in the camera unit, in rare cases some of the pixels may
be disturbed due to the influence of cosmic rays, etc. This disturbance may cause white
spots to appear on the picture.
If white spots appear on the document camera image, use the procedure described below
to correct the problem. 
						

							62
Maintenance
CONTENTS
If there is some problem inside the projector,
the indicators light up or blink.
Trouble indications
Indicators
Or(Lit in red) (Off)
ONLAMPTEMPFA N
(Lit in red)(Lit in red)
ONLAMPTEMPFA N
(Flashing 
  in orange)ONLAMPTEMPFA N
(Lit in red)
ONLAMPTEMPFA N
(Lit in red)
Or
(Lit or flashing 
     in red)
(Lit or flashing
      in orange)
Or
Or
Or
(Lit in red)(Lit in red)
(Lit in green)
(Lit in green) (Lit in orange)
ONLAMPTEMPFA N
(off)
The power does not come on.→Malfunction of the unit.
• Unplug the power cord and call the dealer.
The lamp turns off or does not light up. →The projector will return to the standby mode in about 2 minutes.
If the projector does not operate normally when the power is switched on again, 
the lamp is at the end of its life duration or the unit has a fault.
• Lamps life duration is over, replace the lamp with a new one.
• Unplug the power cord and call the dealer.
The power turns off or does not come on. → The inside is too hot, or the projector has been working in an area of high 
temperature.
• Place the projector correctly so the intake and exhaust fans holes are not covered.
• Turn the projector off, and leave it for a while, and turn it on again.
• Clean the air filter.
* The         icon appears before the power turned off.
* The projector returns to the standby mode after the fault display has been shown 
for about 2 minutes.
The power turns off or does not come on.→ Trouble with the cooling fan.
• Unplug the power cord and call the dealer.
* The         icon appears before the power turned off.
* The projector returns to the standby mode after the fault display has been shown 
for about 2 minutes.
The power turns off or does not come on. →The lamp cover is not properly attached.
• Unplug the power cord and reattach the lamp cover.
* The         icon appears before the power turned off.
* The projector returns to the standby mode after the fault display has been shown 
for about 2 minutes.
66
63
67
KEYSTONE
AUTOSET
EXIT
ON / STANDBY
VOL / ADJ
ENTER
MENU
INPUT
FANTEMPLAMPON
Control panel
(Main unit side)
Notes
• If abnormality occurs while operating, unplug the power cord.
• When reinserting the power cord before the lamp has cooled, please wait until the lamp has cooled sufficiently
before use. When the lamp is at a high temperature, it may not light and the life duration will be shortened. 
						

							63
Maintenance
CONTENTSAir filter cleaning
CAUTION
If you use the projector mounted on the ceiling,
ask the dealer to carry out the maintenance
such as cleaning.
The filter inside the air filter cover is the part
to shut out dusts or dregs.
Do not use the projector with the filter taken
off.
We recommend you clean the air filter
frequently. (The cleaning period is once per
50 hours approximately).2 1
Unplug the power cord.
Take off the air filter
cover.
The filter is on the right and
bottom side of the projector.
The illustration is viewed from
the bottom side.
3
Continued Air filter Air filter cover
Filter frame
Disassemble the air filter.
Air filter for the right side
Air filter for the bottom side 
						

							64
Maintenance
CONTENTSAir filter cleaning (continued)
Notes
•When the air filter is dusty, the ventilation is
impaired. This causes the temperature inside the
projector to rise, and may damage the unit.
•Attach the air filter cover firmly after the cleaning.
If it is not set correctly, the dusts will enter and
they will be projected and overlapped on the
picture.
•If you wash the air filter with water, be sure to let it
dry fully before reinstalling it.  Using it damp will
result in malfunction.
•If the air filter is damaged, contact your store of
purchase and replace it with a new one.  Using a
damaged air filter will cause dust or dirt to get
inside the projector and onto the images.
Cleaner’s nozzle
Clean the air filter.
Use a vacuum cleaner to carefully remove any
dust and dirt from the air filter cover, air filter and
filter frame.
Be careful that the air filter is not sucked into the
vacuum cleaner.4
Assemble the air filter.
Mount the air filter.
Surely mount the air filters on the
right and bottom side.
5
6
Air filter for the right side Air filter for the bottom side 
						

							65
Maintenance
CONTENTS
Cleaning the lens
Use a blower or a lens cleaner to clean the lens.
Never rub or tap the lens with a hard object as
the lens surface is fragile.
Lens and main unit cleaning
Cleaning the main unit
•Pull out the power cord before cleaning.
•Use a soft cloth to wipe off stains from the
surface.
•To remove difficult stains, use a soft cloth
slightly moistened with a weak solution of
synthetic detergent and water, and finish with
a soft, dry cloth.
Replacing the intake, exhaust fans and air filter
To maintain the efficiency of the projector, replace the intake and exhaust
fans about every two to three years.
Ask the dealer for the replacement.
CAUTION
If you use the projector mounted on the ceiling,
ask the dealer to carry out the maintenance
such as cleaning. 
						

							66
Maintenance
CONTENTSLamp replacement
A lamp is consumable supplies. If used for
extended periods, images will appear dark,
and the lamp could burn out. This is
characteristic of a lamp, and is not
malfunction. (The lifetime of the lamp
depends on conditions of use.) If this
happens, replace it with a new one.
CAUTION
• If you use the projector mounted on the ceiling,
ask the dealer to carry out the maintenance
such as cleaning or replacement of the lamp.
• When replacing, always use lamp “TLPL79”
(sold separately). For details, refer to the lamp
instruction.
• If you have been using the projector, the lamp
will be very hot, and may cause burn injuries.
Wait for the lamp to cool (for longer than 1
hour) before replacing it.
• If the lamp should break, please handle with
care to avoid injury due to broken pieces and
contact your dealer for repair service.
Unplug the power cord.
1
Wait until the lamp gets cool enough.
2
3
Take off the lamp cover on the
bottom panel.
Loosen the two screws, and pull off the lamp
cover.
Pull out the lamp.
Loosen the two fixing screws, and lift up the
handle to pull out the lamp.4
2
1
Continued Lamp cover
2 1 
						

							67
Maintenance
CONTENTS
Notes
•When the CALL button is pressed, the “Lamp
time” (the approximate amount of time the lamp
has been used) will be displayed. 
41
•The lamp should be replaced if the total working
time exceeds about 1,500 hours.
When the “Lamp time” is displayed as 1,500
hours, the icon 
 appear. They will disappear
when you do some operation.
•Attach the lamp cover firmly after replacing the
lamp. If it is not set correctly, the power will not
turn on.
•Use a new lamp when replacing it.
•The lamp is made of glass and is very fragile. Do
not touch the lamp with your bare hands and do
not jolt or damage it. Do not try to use an
exhausted lamp.
•Dispose of the exhausted lamp as toxic waste.
Lamp replacement (continued)
5
Load a new lamp.
Slide until it hits the bottom and tighten the two fixing screws.
6
Attach the lamp cover.
Slide the cover into place and tighten the two
screws.
Reset the lamp timer.
Refer to the lamp instructions for resetting.7
3
21 
						

							68
Others
CONTENTSBefore calling service personal
Symptom
The power does not come on.
The power turns off while
using the projector.
No image appears.
No sound is heard.
Desired input source cannot
be selected by the INPUT
button.
Analog RGB(1) input or Y/P
B/
PR input colors are not right.
Analog RGB(2) input image
does not appear.
Digital RGB input image does
not appear.
The image is blurred.
Focusing is uneven.
The picture is dim.
Cause
• The power cord is disconnected.
• The lamp cover is not attached correctly.
• The ambient temperature of the projection room is too high.
• The lens cover is on.
• The wrong input is selected.
• The muting mode is on.
• The “Brightness” adjustment is at its darkest.
• The source is not correctly connected to the projector.
• The wrong input is selected.
• The muting mode is on.
• The sound volume is at it’s minimum.
• The source is not correctly connected to the projector.
•
Input is not set so that it can be selected with the INPUT button. By
default, only the Analog RGB(1) and Video input modes can be
selected.
•The COMPUTER IN 1 connectors input setting is wrong.
• The COMPUTER IN 2 connector ’s input setting is wrong.
• The signal cable type is wrong.
• The COMPUTER IN 2 connector ’s input setting is wrong.
• The signal cable type is wrong.
• The lens is dirty.
• The picture is out of focus.
• The projection distance is not appropriate.
• The projecting light is not hitting the screen squarely.
• The “Brightness”, “Contrast”, “Sharpness” or “Phase” adjustments
are not correct.
• The “Brightness” or “Contrast” adjustments are not correct.
• The lamp life is ending.
Correction
Firmly plug in the power cord.
Attach the cover correctly.
Lower the ambient temperature of the projection room,
and turn the power on.
Take off the lens cover.
Select the input source correctly.
Press MUTE to restore the picture.
Make the “Brightness” adjustment.
Connect the source correctly to the projector.
Select the input source correctly.
Press MUTE to restore the sound.
Adjust the sound volume.
Connect the source correctly to the projector.
Set from the menu screen so that the source can be
selected with the INPUT button.
On the menu screen, set for the proper input signal type.
On the menu screen, set for the proper input signal type.
Use a proper signal cable.
At the menu screen, set for the proper input signal type.
Use a proper signal cable.
Clean the lens with a blower or lens cleaner, etc.
Focus the picture.
Adjust the distance properly.
Adjust the projecting direction so that the light hits the
screen squarely.
Make the “Picture” adjustments.
Make the “Picture” adjustments.
Replace the lamp.
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19
30
37
45
22 
- 25
30
37
32
22 
- 25
45
30
45
45
23
45
23
65
31
18
18
45
45
66
Check the following points before asking for support service. Refer also to “Trouble indications”. 62
Continued 
						

							69
Others
CONTENTS
Symptom
The color is faint.
The tint is not good.
The remote control does not
work.
Mouse function cannot be used
from the remote control unit.
Document camera image is
blurry.
Document camera image
flickers.
Document camera image
movement is awkward.
Horizontal stripes appear
when document projected with
the document camera is
moved.
Cause
•The “Color”, “Tint”, “R-Level”, “G-Level” or “B-Level” adjustments
are not correct.
•The lamp life is ending.
•The remote control is not facing the remote sensor.
•The remote control is too far away.
•There is an obstruction between the remote control and the
remote sensor.
•The batteries are exhausted.
•The USB cable is not properly connected.
•The computer or OS is not compatible.
•The batteries are exhauste.
•The lens is dirty.
•The picture is out of focus.
•The light is not on.
•Image is being affected by fluorescent light in the room.
•The image’s number of frames is low.  This is not a malfunction.
•The image’s number of frames is low.  This is not a malfunction.
Correction
Make the “Picture” adjustments.
Replace the lamp.
Face the remote control transmitter toward the remote
sensor on the projector.
Operate within about 5 meters.
Remove the obstacle.
Replace the batteries.
Connect the USB cable properly.
The remote control mouse function is not available.
Replace the batteries.
Clean the lens with a blower or lens cleaner, etc.
Focus the picture by turning the focus ring.
Turn on the light.
Set the shutter speed on the menu screen.
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16
16
–
15
42
–
15
65
57
56
45
Before calling service personal (continued) 
						

							70
Others
CONTENTS
Mini D-sub 15pin
connector
Pin No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
Description
T.M.D.S. data 2 -
T.M.D.S. data 2 +
T.M.D.S. data 2/4 shield
T.M.D.S. data 4 -
T.M.D.S. data 4 +
DDC clock
DDC data
Analog vertical sync signal
T.M.D.S. data 1 -
T.M.D.S. data 1 +
T.M.D.S. data 1/3 shield
T.M.D.S. data 3 -
T.M.D.S. data 3 +
+5V power
GND (+5V, H Sync & V Sync)
Pin assignment of COMPUTER IN connector
COMPUTER IN 1
COMPUTER IN 2
DVI ANALOG & DIGITAL
connector
Input signal
Analog R, G, B signal: 0.7V(p-p) 75Ω
Horizontal sync signal:
TTL level (positive/negative polarity)
Vertical sync signal:
TTL level  (positive/negative polarity)
Y signal: 1.0V(p-p) 75Ω
P
B, PR signal: 0.7V(p-p) 75ΩAnalog input signal
Analog R, G, B signal: 0.7V(p-p) 75Ω
Horizontal sync signal:
TTL level (positive/negative polarity)
Vertical sync signal:
TTL level  (positive/negative polarity)
Pin No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
RGB input
Video signal (Red)
Video signal (Green)
Video signal (Blue)
GND
GND
GND (Red)
GND (Green)
GND (Blue)
N.C
GND
GND
DDC data
Horizontal sync signal
Vertical sync signal
DDC clock
Y/PB/PR input
Color difference signal (PR)
Luminance signal (Y)
Color difference signal (PB)
*
*
GND (PR)
GND (Y)
GND (PB)
*
*
*
*
*
*
*
DescriptionPin No.
16
17
18
19
20
21
22
23
24
C1
C2
C3
C4
C5
Description
Hot plug detection
T.M.D.S. data 0 -
T.M.D.S. data 0 +
T.M.D.S. data 0/5 shield
T.M.D.S. data 5 -
T.M.D.S. data 5 +
T.M.D.S. clock shield
T.M.D.S. clock +
T.M.D.S. clock -
Analog Video signal (Red)
Analog Video signal (Green)
Analog Video signal (Blue)
Analog horizontal sync signal
Analog GND (R,G & B)
* : Do not connect anything.
5 11015 11
6
C5C3 24 C4
C1 C2
81
16179