Name: Manual for CP-EX251N/CP-EX301N/CP-EW301N
Brand: Projector
Availability: InStock

Troubleshooting and error codes

Phenomenon	Cases not involving a machine defect	Reference page
Power does not come on.	The electrical power cord is not plugged in. Correctly connect the power cord.	15
	The main power source has been interrupted during operation such as by a power outage (blackout), etc. Please disconnect the power plug from the power outlet, and allow the projector to cool down at least 10 minutes, then turn the power on again.	15
	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 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.	74
Neither sounds nor pictures are outputted.	The signal cables are not correctly connected. Correctly connect the connection cables.	12~14
	Signal source does not correctly work. Correctly set up the signal source device by referring to the manual of the source device.	–
	The input changeover settings are mismatched. Select the input signal, and correct the settings.	23, 24
	The BLANK function for pictures and the MUTE function for sounds are working. 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.	22, 31
Sound does not come out.	The signal cables are not correctly connected. Correctly connect the audio cables.	12~14
	The MUTE function is working. Restore the sound pressing MUTE or VOLUME +/- button on the remote control.	22
	The volume is adjusted to an extremely low level. Adjust the volume to a higher level using the menu function or the remote control.	22, 50
	The AUDIO SOURCE/SPEAKER setting is not correct. Correctly set the AUDIO SOURCE/SPEAKER in AUDIO menu.	50
No pictures are displayed.	The signal cables are not correctly connected. Correctly connect the connection cables.	12~14
	The brightness is adjusted to an extremely low level. Adjust BRIGHTNESS to a higher level using the menu function.	36
	The computer cannot detect the projector as a Plug-and-Play monitor. Make sure that the computer can detect a Plug-and-Play monitor using another Plug-and-Play monitor.	11
	The BLANK screen is displayed. Press BLANK button on the remote control.	31
	COMPUTER IN2 is set to MONITOR OUT. Set COMPUTER IN2 to AUTO or Sync ON G OFF.	44
Video screen display freezes.	The FREEZE function is working. Press FREEZE button to restore the screen to normal.	31
Colors have a faded- out appearance, or Color tone is poor.	Color settings are not correctly adjusted. Perform picture adjustments by changing the COLOR TEMP, COLOR, TINT and/or COLOR SPACE settings, using the menu functions.	37, 42
	COLOR SPACE setting is not suitable. Change the COLOR SPACE setting to AUTO, RGB, SMPTE240, REC709 or REC601.	42
Pictures appear dark.	The brightness and/or contrast are adjusted to an extremely low level. Adjust BRIGHTNESS and/or CONTRAST settings to a higher level using the menu function.	36
	The projector is operating in Eco mode. Set ECO MODE to OFF, and set AUTO ECO MODE to OFF, in the SETUP menu.	47
	The lamp is approaching the end of its product lifetime. Replace the lamp.	74, 75
Pictures appear blurry.	Either the focus and/or horizontal phase settings are not properly adjusted. Adjust the focus using the focus ring, and/or H PHASE using the menu function.	26, 41
	The lens is dirty or misty. Clean the lens referring to the section Caring for the lens.	78
Some kind of image degradation such as flickering or stripes appear on screen.	When the projector is operating in Eco mode, flickering may appear on screen. Set ECO MODE to OFF, and set AUTO ECO MODE to OFF, in the SETUP menu.	47
	The OVER SCAN ratio is too big. Adjust OVER SCAN in the IMAGE menu smaller.	40
	Excessive VIDEO NR. Change the setting of VIDEO NR in the INPUT menu.	42
	The FRAME LOCK function cannot work on the current input signal. Set FRAME LOCK in the INPUT menu to OFF.	44
RS-232C does not work.	The SAVING function is working. Select NORMAL for STANDBY MODE item in the SETUP menu.	49
NETWORK BRIDGE function does not work	The COMMUNICATION TYPE for the CONTROL port is set to NETWORK BRIDGE. Select OFF for COMMUNICATION TYPE item in the OPTION - SERVICE - COMMUNICATION menu.	65
	The NETWORK BRIDGE function is turned off. Select NETWORK BRIDGE for COMMUNICATION TYPE item in the OPTION - SERVICE - COMMUNICATION menu.	65
Network does not work	The SAVING function is working. Select NORMAL for STANDBY MODE item in the SETUP menu.	49
Schedule function does not work	The SAVING function is working. Select NORMAL for STANDBY MODE item in the SETUP menu.	49
	The internal clock has been reset. Once you turn off the projector in the SAVING mode or the AC power, the current date and time setting is reset. Check the DATE AND TIME setting for SETUP in the NETWORK menu.	–
When the projector is connected to wired LAN, it powers off and on as described below.	Disconnect the LAN cable and check that the projector is working properly. If this phenomenon occurs after connecting to the network, there may be a loop between two Ethernet switching hubs within the network, as explained below. There are two or more Ethernet switching hubs in a network. Two of the hubs are doubly connected by LAN cables. This double connection forms a loop between the two hubs. Such a loop may have an adverse effect on the projector as well as the other network devices. Check the network connection and remove the loop by disconnecting the LAN cables such that there is only one connecting cable between two hubs.	–

Manual for CP-EX251N/CP-EX301N/CP-EW301N

Turning on the power

Turning off the power

Adjusting the volume

Temporarily muting the sound

Troubleshooting and error codes