3Com 8755H, 8913H, 8916, 8912H user manual Troubleshooting, Related messages

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Troubleshooting

Troubleshooting

If an abnormal operation should occur, stop using the projector immediately.

WARNING ►Never use the projector if abnormal operations such as smoke, strange odor, excessive sound, damaged casing or elements or cables, penetration of liquids or foreign matter, etc. should occur. In such cases, immediately turn off the power switch and then disconnect the power plug from the power outlet. After making sure that the smoke or odor has stopped, contact to your dealer or service company.

Otherwise if a problem occurs with the projector, the following checks and measures are recommended before requesting repair.

If this does not resolve the problem, please contact your dealer or service company. They will tell you what warranty condition is applied.

Related messages

When some message appears, check and cope with it according to the following table. Although these messages will be automatically disappeared around several minutes, it will be reappeared every time the power is turned on.

Message

Description

 

 

 

There is no input signal.

 

Please confirm the signal input connection, and the status

 

of the signal source.

 

The horizontal or vertical frequency of the input signal

 

is not within the specified range.

 

Please confirm the specs for your projector or the signal

 

source specs.

 

An improper signal is input.

 

Please confirm the specs for your projector or the signal

 

source specs.

 

The internal temperature is rising.

 

Please turn the power off, and allow the projector to cool

 

down at least 20 minutes. After having confirmed the

 

following items, please turn the power ON again.

 

• Is there blockage of the air passage aperture?

 

• Is the air filter dirty?

 

• Does the peripheral temperature exceed 35°C?

 

If the same indication is displayed after the remedy, please set

 

FAN SPEED of the SERVICE item in the OPTION menu to HIGH.

 

A note of precaution when cleaning the air filter.

 

Please immediately turn the power off, and clean or change

 

the air filter referring to the “Cleaning and replacing the

 

air filter” section of this manual. After you have cleaned or

 

changed the air filter, please be sure to reset the filter timer

 

(56).

 

 

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Contents Trademark acknowledgment About this manualThank you for purchasing this projector Contents Fastening the lens cover Contents of packageHOT Part namesProjector Cb/Pb, Cr/Pr ports Video port Audio IN3 L,R ports 11 13 10 Control panelRear panel &9 Control port USB portRemote control On a horizontal surface Suspended from the ceiling Setting upArrangement Arrangement Player Connecting your devicesMonitor VCR/DVDAbout Plug-and-Play capability Connecting your devicesAnti-theft chain or wire Security slot Security bar Connecting power supplyUsing the security bar and slot AC inlet Power cordPutting batteries Remote controlAbout the remote control signal Mouse left button Press Enter button Changing the frequency of remote control signalUsing as a simple PC mouse & keyboard Mouse right button Press Reset buttonTurning off the power Power on/offTurning on the power Operating Adjusting the volumeSelecting an input signal Press Mute button on the remote control For no signal Searching an input signalSelecting an input signal  For a computer signalFocus ring Adjusting the projectors elevatorAdjusting the zoom and focus  For a component video signal Using the automatic adjustment featureAdjusting the position  For a video signal and s-video signalCorrecting the keystone distortions Using the magnify featureBlank button Freezing the screenTemporarily blanking the screen Freeze buttonMenu button Using the menu functionESC button Reset button Easy MenuAdvanced Menu Using the menu functionAdvanced Menu Keystone Picture ModeAspect AutoEasy Menu Gamma Picture menuColor Temp Picture menuSAVE-1, SAVE-2, SAVE-3, SAVE-4 LOAD-1, LOAD-2, LOAD-3, LOAD-4MY Memory Over Scan For a computer signalFor no signal Image menuSize PhaseAuto Adjust Image menuColor Space Input menuProgressive Video NRFrame Lock Input menuVideo Format For some pictures, this function may not work well ResolutionSetup menu Monitor OUT Setup menuStandby Mode Audio VolumeAudio menu SpeakerBlank Using the /// buttons adjusts the menu positionScreen menu MyScreen Screen menuStart UP Message Capturing error has occurred. Please try againMyScreen registration is finished MyScreen LockTemplate Source NameAuto on Option menuAuto Search Lamp Time Option menuAuto OFF MY Source ServiceMY Button Filter Message GhostInformation Factory ResetKEY Lock Remote FreqSecurity Using Security FeaturesInputting the Password Changing the PasswordSetting the Password Using the MyScreen Password FunctionIf you have forgotten your Password Turning on the MyScreen Password FunctionRegistering the PIN Code Using the PIN Lock FunctionTurning the Password off Description SecurityIf you have forgotten your PIN Code Turning Off the PIN Lock FunctionTurning On the Transition Detector Function Using the Transition Detector FunctionSetting the Transition Detector Password Setting the Transition Detector off Displaying the MY Text Using the MY Text Password functionWriting the MY Text Description Turning on the MY Text Password Channel Closed Caption menuDisplay ModeLamp cover MaintenanceReplacing the lamp Type number 456-8755H Replacing the lampReplacing the lamp Lamp warningType number MU05611 Cleaning and replacing the air filterCleaning and replacing the air filter Caring for the lens Caring for the cabinet and remote controlOther care Inside of the projectorRelated messages TroubleshootingRegarding the indicator lamps Shutting the projector down Resetting all settingsInput changeover settings are mismatched Electrical power cord is not pluggedSignal cables are not correctly connected Signal source does not correctly workLens cover is attached Volume is adjusted to an extremely low levelAUDIO/SPEAKER setting is not correct Mute function is workingWhisper function is working Color settings are not correctly adjustedColor Space setting is not suitable Not properly adjusted916 SpecificationsSpecifications 913H100 112 Unit mm Specifications270

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.