Before calling service personal

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

CONTENTS

68

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

Page 68
Image 68
Toshiba TLP380, TLP381 owner manual Before calling service personal, Symptom Cause Correction

TLP381, TLP380 specifications

The Toshiba TLP380 and TLP381 are advanced optoisolators designed for various applications requiring reliable isolation and switching control. These devices are particularly valuable in communication, industrial, and consumer electronics, where signal integrity and noise immunity are crucial.

The TLP380 is a phototransistor optoisolator, featuring a gallium arsenide infrared LED and a phototransistor. With a minimum isolation voltage of 5,000 VRMS, it provides high voltage isolation between input and output, making it an excellent choice for protecting sensitive components from high voltages and surges. The TLP380 offers a high-speed switching capability, with a rise time of around 4 μs, enabling it to transmit signals efficiently in digital circuits.

On the other hand, the TLP381 is also a phototransistor optoisolator but specifically optimized for lower input current, making it more power-efficient. It offers similar isolation voltage ratings and switching characteristics to the TLP380, but with a lower input current threshold, which can be particularly advantageous in battery-powered applications. The lower current requirement helps extend battery life and minimizes power consumption in portable devices.

Both TLP380 and TLP381 devices feature a wide temperature range, making them suitable for various environmental conditions. Their operating temperature ranges from -40°C to +100°C, ensuring reliable performance under extreme conditions. Additionally, with their compact DIP packages, they are easy to integrate into crowded PCB layouts, making them a preferred choice for designers targeting space-constrained applications.

In terms of characteristics, both models provide low output voltage saturation and high-speed operation, which are critical in achieving fast response times in control circuits. The combination of robust isolation, efficient power consumption, and temperature stability makes the TLP380 and TLP381 versatile solutions for isolating signals in a myriad of electronic systems.

In summary, the Toshiba TLP380 and TLP381 optoisolators are engineered for high-performance signal isolation, offering superior technologies and characteristics that cater to a range of applications. Their reliability, efficiency, and compact design make them a compelling choice for engineers and designers looking to enhance their electronic systems.