3Com 8755H Mute function is working, Volume is adjusted to an extremely low level, Play monitor

Page 63

Troubleshooting

Phenomena that may be easy to be mistaken for machine defects (continued)

Phenomenon

Cases not involving a machine defect

Reference

page

 

 

 

 

 

 

The signal cables are not correctly connected.

9

 

Correctly connect the audio cables.

 

 

 

The MUTE function is working.

15

 

Restore the sound pressing MUTE or VOLUME button on

Sound does not

the remote control.

 

come out.

The volume is adjusted to an extremely low level.

15

 

Adjust the volume to a higher level using the menu function

 

or the remote control.

 

 

The AUDIO/SPEAKER setting is not correct.

35

 

Correctly set the AUDIO/SPEAKER in AUDIO menu.

 

 

 

The lens cover is attached.

4, 14

 

Remove the lens cover.

 

 

 

The signal cables are not correctly connected.

9

 

Correctly connect the connection cables.

 

 

 

The brightness is adjusted to an extremely low level.

24, 25

No pictures are

Adjust BRIGHTNESS to a higher level using the menu

function.

 

displayed.

 

 

The computer cannot detect the projector as a plug

 

 

and play monitor.

10

 

Make sure that the computer can detect a plug and play

 

 

 

monitor using another plug and play monitor.

 

 

The BLANK screen is displayed.

20

 

Press BLANK button on the remote control.

 

 

(Continued on next page)

 

63

Image 63
Contents About this manual Thank you for purchasing this projectorTrademark acknowledgment Contents Fastening the lens cover Contents of packagePart names ProjectorHOT Cb/Pb, Cr/Pr ports Video port Audio IN3 L,R ports 11 13 10 Control panelRear panel &9 Control port USB portRemote control Setting up ArrangementOn a horizontal surface Suspended from the ceiling 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 cordRemote control About the remote control signalPutting batteries Mouse left button Press Enter button Changing the frequency of remote control signalUsing as a simple PC mouse & keyboard Mouse right button Press Reset buttonPower on/off Turning on the powerTurning off 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 signalAdjusting the projectors elevator Adjusting the zoom and focusFocus ring  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 MenuUsing the menu function Advanced MenuAdvanced Menu Keystone Picture ModeAspect AutoEasy Menu Gamma Picture menuColor Temp Picture menuLOAD-1, LOAD-2, LOAD-3, LOAD-4 MY MemorySAVE-1, SAVE-2, SAVE-3, SAVE-4 Over Scan For a computer signalFor no signal Image menuSize PhaseAuto Adjust Image menuColor Space Input menuProgressive Video NRInput menu Video FormatFrame Lock For some pictures, this function may not work well ResolutionSetup menu Setup menu Standby ModeMonitor OUT Audio VolumeAudio menu SpeakerUsing the /// buttons adjusts the menu position Screen menuBlank Screen menu Start UPMyScreen Message Capturing error has occurred. Please try againMyScreen registration is finished MyScreen LockTemplate Source NameOption menu Auto SearchAuto on Option menu Auto OFFLamp Time Service MY ButtonMY Source 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 FunctionUsing the Transition Detector Function Setting the Transition Detector PasswordTurning On the Transition Detector Function Setting the Transition Detector off Using the MY Text Password function Writing the MY TextDisplaying 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 913HSpecifications 270100 112 Unit mm

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.

The 3Com 8913H extends the capabilities of the 8912H with 24 ports, making it ideal for growing organizations that require scalable networking solutions. Built with high availability in mind, the 8913H includes redundancy features that minimize downtime. It also supports Power over Ethernet (PoE), enabling the delivery of power to connected devices like IP phones and wireless access points directly through the network cable. This feature not only simplifies the installation of these devices but also enhances network management.

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.

Lastly, the 8755H switch stands out due to its ability to deliver high bandwidth and performance for large data center environments. It features a modular design, enabling the deployment of various interface modules to support different network requirements. This flexibility, combined with extensive manageability options, allows the 8755H to adapt to evolving network needs. Its robust security features safeguard the network against unauthorized access and attacks, making it a core component in secure enterprise architectures.

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.