Troubleshooting

Phenomena that may be easy to be mistaken for machine defects

About the phenomenon confused with a machine defect, check and cope with it according to the following table.

Phenomenon

Cases not involving a machine defect

Reference

page

 

 

 

 

 

 

The electrical power cord is not plugged in.

11

 

Correctly connect the power cord.

 

 

 

The main power source has been interrupted during

 

 

operation such as by a power outage (blackout), etc.

11, 14

 

Please disconnect the power plug from the power outlet,

Power does not

and allow the projector to cool down at least 10 minutes,

 

then turn the power on again.

 

come on.

 

 

Either there is no lamp and/or lamp cover, or either

 

 

 

 

of these has not been properly fixed.

 

 

Please turn the power off and disconnect the power plug from

54, 55

 

the power outlet, and allow the projector to cool down at least

 

45 minutes. After the projector has sufficiently cooled down,

 

 

please make confirmation of the attachment state of the lamp

 

 

and lamp cover, and then turn the power on again.

 

 

The signal cables are not correctly connected.

9

 

Correctly connect the connection cables.

 

 

 

Signal source does not correctly work.

 

Correctly set up the signal source device by referring to the

Neither sounds

manual of the source device.

 

The input changeover settings are mismatched.

 

nor pictures are

15, 16

outputted.

Select the input signal, and correct the settings.

 

 

The BLANK function for pictures and the MUTE

 

 

function for sounds are working.

15, 20

 

AV Mute may be active. Refer to the item “Sound does not

 

come out” and “No pictures are displayed” on the next page

 

 

to turn off the MUTE and BLANK functions.

 

(Continued on next page)

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Image 62
3Com 8912H Electrical power cord is not plugged, These has not been properly fixed, Signal source does not correctly work

8755H, 8916, 8913H, 8912H specifications

3Com has long been known for its innovative networking solutions, and the 3Com 8912H, 8913H, 8916, and 8755H are prime examples of the company's commitment to high performance and versatility in networking technology. Each of these switches is engineered to meet the demanding requirements of modern network environments, providing robust functionalities designed for enterprise use.

The 3Com 8912H is a high-performance switch that offers 12 ports, allowing for efficient connectivity in medium-sized networks. One of its standout features is its support for Quality of Service (QoS), which prioritizes data traffic to enhance voice and video applications, ensuring minimal latency and jitter. Additionally, it includes advanced Layer 2 switching capabilities, enabling the management of bandwidth and improving network efficiency. Its ability to handle packet filtering and VLAN support allows for the segmentation of network traffic, enhancing both security and performance.

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The 3Com 8916 is a more robust model, providing 16 ports and advanced Layer 2 and Layer 3 features. Its intelligent networking capabilities, such as static routing and dynamic management features, make it a suitable choice for larger networks. The switch supports stacking capabilities, allowing multiple units to operate as a single logical unit. This capability enhances management simplicity and scalability while providing redundancy and load balancing for even greater reliability.

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In summary, the 3Com 8912H, 8913H, 8916, and 8755H switches embody a comprehensive suite of networking features designed for efficiency, scalability, and security. They showcase 3Com's commitment to providing high-quality, reliable networking solutions that meet the diverse needs of businesses in an ever-evolving digital landscape.