Before calling service personal | Toshiba TLP780U TLP781U guide

Before calling service personal (continued)

CONTENTS

Symptom		Cause	Correction	Page
The color is faint.	•	The “Color”, “Tint”, “R-Level”, “G-Level” or “B-Level” adjustments	Make the “Picture” adjustments.	48
The tint is not good.		are not correct.
	•	The lamp life is ending.	Replace the lamp.	66
The remote control does not	•	The remote control is not facing the remote sensor.	Face the remote control transmitter toward the remote	16
work.			sensor on the projector.
	•	The remote control is too far away.	Operate within about 5 meters.	16
	• There is an obstruction between the remote control and the		Remove the obstacle.	–
		remote sensor.
	•	The batteries are exhausted.	Replace the batteries.	15
Mouse function cannot be used	•	The USB cable is not properly connected.	Connect the USB cable properly.	42
from the remote control unit.	• The computer or OS is not compatible.		The remote control mouse function is not available.	–
	•	The batteries are exhauste.	Replace the batteries.	15
Document camera image is	•	The lens is dirty.	Clean the lens with a blower or lens cleaner, etc.	65
blurry.	•	The picture is out of focus.	Focus the picture by turning the focus ring.	57
	•	The light is not on.	Turn on the light.	56
Document camera image	•	Image is being affected by fluorescent light in the room.	Set the shutter speed on the menu screen.	45
flickers.
Document camera image	•	The image’s number of frames is low. This is not a malfunction.
movement is awkward.
Horizontal stripes appear	•	The image’s number of frames is low. This is not a malfunction.
when document projected with
the document camera is
moved.

Others

TLP780U TLP781U specifications

The Toshiba TLP780U and TLP781U are opto-isolators designed to provide excellent performance in various applications, ensuring high levels of electrical isolation between input and output circuits. These devices are part of Toshiba's extensive portfolio of opto-couplers, which leverage advanced technologies to meet the demands of modern electronic systems.

One of the most notable features of the TLP780U and TLP781U is their high isolation voltage, which is rated up to 5000Vrms. This is particularly important in applications where safety and protection of sensitive components from high voltages are crucial. By providing robust electrical isolation, these opto-isolators help in preventing damage from voltage spikes and interference.

Both the TLP780U and TLP781U utilize a high-speed GaAlAs infrared LED as the light source, coupled with a phototransistor on the output side. This configuration enables rapid data transmission, making these devices suitable for high-speed applications. The TLP780U boasts a high-speed variant, while the TLP781U is designed for lower-speed requirements, offering flexibility depending on the application's needs.

In terms of package design, the TLP780U and TLP781U come in a compact and reliable DIP (Dual In-line Package) configuration. This allows for easy integration into printed circuit boards (PCBs), while also ensuring stable performance in various operational environments. Their compact size is particularly beneficial in space-constrained applications.

Another important characteristic of these devices is their wide operating temperature range, from -40°C to 100°C. This wide range ensures reliable operation in diverse environments, making them suitable for industrial, automotive, and consumer applications. This reliability is further enhanced by the devices' long operational lifespan, reducing the need for frequent replacements.

In summary, the Toshiba TLP780U and TLP781U opto-isolators deliver essential electrical isolation, high-speed performance, and versatile operational capabilities. Their combination of advanced technologies and robust features positions them as ideal solutions for interfacing circuits, signal isolation, and data transmission in various industries. Whether for safety-critical systems or general signal processing, these opto-isolators provide the performance and reliability needed in today's electronic designs.

Before calling service personal (continued)

Symptom

TLP780U TLP781U specifications