Before calling service personal

CONTENTS

68

Check the following points before asking for support service. Refer also to “Trouble indications”. 62

 

 

Symptom

Cause

Correction

Page

 

 

 

 

 

The power does not come on.

• The power cord is disconnected.

Firmly plug in the power cord.

 

19

 

• The lamp cover is not attached correctly.

Attach the cover correctly.

 

67

The power turns off while

• The ambient temperature of the projection room is too high.

Lower the ambient temperature of the projection room,

 

62

using the projector.

 

and turn the power on.

 

 

No image appears.

• The lens cover is on.

Take off the lens cover.

 

19

 

• The wrong input is selected.

Select the input source correctly.

 

30

 

 

 

 

 

 

• The muting mode is on.

Press MUTE to restore the picture.

 

37

 

• The “Brightness” adjustment is at its darkest.

Make the “Brightness” adjustment.

 

45

 

• The source is not correctly connected to the projector.

Connect the source correctly to the projector.

22

- 25

 

 

 

 

 

No sound is heard.

• The wrong input is selected.

Select the input source correctly.

 

30

 

• The muting mode is on.

Press MUTE to restore the sound.

 

37

 

• The sound volume is at it’s minimum.

Adjust the sound volume.

 

32

 

 

 

 

 

 

• The source is not correctly connected to the projector.

Connect the source correctly to the projector.

22

- 25

Desired input source cannot

• Input is not set so that it can be selected with the INPUT button. By

Set from the menu screen so that the source can be

 

45

be selected by the INPUT

default, only the Analog RGB(1) and Video input modes can be

selected with the INPUT button.

 

30

button.

selected.

 

 

 

Analog RGB(1) input or Y/PB/

• The COMPUTER IN 1 connector's input setting is wrong.

On the menu screen, set for the proper input signal type.

 

45

PR input colors are not right.

 

 

 

 

 

 

 

 

 

Analog RGB(2) input image

• The COMPUTER IN 2 connector’s input setting is wrong.

On the menu screen, set for the proper input signal type.

 

45

does not appear.

• The signal cable type is wrong.

Use a proper signal cable.

 

23

Digital RGB input image does

• The COMPUTER IN 2 connector’s input setting is wrong.

At the menu screen, set for the proper input signal type.

 

45

 

 

 

 

 

not appear.

• The signal cable type is wrong.

Use a proper signal cable.

 

23

The image is blurred.

• The lens is dirty.

Clean the lens with a blower or lens cleaner, etc.

 

65

Focusing is uneven.

• The picture is out of focus.

Focus the picture.

 

31

 

 

 

 

 

 

• The projection distance is not appropriate.

Adjust the distance properly.

 

18

 

• The projecting light is not hitting the screen squarely.

Adjust the projecting direction so that the light hits the

 

18

 

 

screen squarely.

 

 

 

 

 

 

 

 

• The “Brightness”, “Contrast”, “Sharpness” or “Phase” adjustments

Make the “Picture” adjustments.

 

45

 

are not correct.

 

 

 

The picture is dim.

• The “Brightness” or “Contrast” adjustments are not correct.

Make the “Picture” adjustments.

 

45

 

 

 

 

 

 

• The lamp life is ending.

Replace the lamp.

 

66

Others

Continued

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Page 68
Image 68
Toshiba 790, 791 manual Before calling service personal, Symptom Cause Correction
Page 67 Page 69

791, 790 specifications

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