Correcting illuminated defects

CONTENTS

59

Control panel (Main unit side)

 

 

 

 

 

 

 

ON / STANDBY

 

 

 

 

 

 

 

 

 

P

T

EMP

 

 

 

 

 

 

ON

LAM

 

FAN

 

 

 

 

 

 

 

 

 

 

 

 

 

TE

 

 

 

EXI

 

 

 

 

 

EN

R

 

 

 

T

 

 

 

 

 

U

 

 

 

 

A

 

 

 

 

 

 

 

 

 

UT

 

 

 

 

 

N

 

 

 

 

O

S

 

 

 

 

E

 

 

 

 

 

 

 

 

 

M

 

 

 

 

 

ET

 

 

 

 

 

 

 

 

 

 

K

 

 

 

 

T

 

 

 

 

 

E

 

 

 

 

 

 

 

 

 

S

 

 

 

U

 

 

 

 

 

 

Y

 

N

P

 

 

 

 

 

 

T

I

 

 

 

 

 

 

 

O

 

 

 

 

 

 

 

 

N

 

 

 

 

 

 

 

 

 

E

 

 

 

 

 

 

 

VOL / ADJ

 

 

 

2

Press both sides

Camera control panel

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.

1

With the document camera operating, fully

cover the camera lens with a piece of black

paper or cloth.

Camera lens

imaging

LOCK

W.BALANCE

ARM LIGHT

 

CAMERA

CAMERA

 

GAIN

 

2 ARM LIGHT

EXIT

Note

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.

cameraDocument

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.

Page 59
Image 59
Toshiba TLP550, 251, 250 Correcting illuminated defects, With the document camera operating, fully, Paper or cloth, Imaging

251, TLP550, TLP551, 250 specifications

Toshiba has long been recognized for its innovation in the field of semiconductor technology, particularly in the area of optoelectronic devices. Among its extensive portfolio, the Toshiba TLP series stands out, especially models such as the TLP250, TLP551, TLP550, and TLP251. These optoisolators are designed to provide exceptional performance in various applications, including industrial controls, communication equipment, and power supplies.

The TLP250 is a high-speed transistor optoisolator that boasts a maximum data transmission rate of up to 10 Mbps. It is designed for applications where precise isolation between input and output is critical. The device employs a GaAlAs light-emitting diode, ensuring a fast response time and efficient operation. Its package includes a phototransistor, which enables it to switch high voltages and currents, making it ideal for driving loads in various circuits.

In contrast, the TLP551 offers a higher level of phototransistor isolation with a breakdown voltage of up to 5 kV. This model is well-suited for environments where electrical noise is a concern, as it provides reliable and stable isolation. With a maximum forward current of 50 mA, the TLP551 ensures that even in complex industrial settings, signal integrity can be maintained effectively.

The TLP550 is another noteworthy optoisolator, characterized by its compact size and robust performance. It also integrates a phototransistor output, which allows for a high degree of flexibility in design. This model is engineered to deliver a maximum isolation voltage of 3.75 kV, making it suitable for various high-voltage applications.

Finally, the TLP251 offers a unique combination of features tailored for demanding applications. With its high-speed response and excellent voltage gain, it is particularly advantageous in communication systems. Its ability to provide isolation while transferring data makes it an essential component for many digital interfaces.

In summary, the Toshiba TLP series, including models like the TLP250, TLP551, TLP550, and TLP251, exemplify the brand's commitment to quality and innovation in optoelectronic devices. These models are engineered to meet the rigorous demands of modern applications, offering features such as high-speed operation, significant isolation voltage ratings, and versatile output options. For engineers and designers, choosing the right Toshiba optoisolator can significantly enhance the reliability and efficiency of their electronic systems.