Brand: CP
Category: Projector
Document Type: Manual
Language: EN
Available Languages: EN , ES
Manual for EX250N/CP-EX300N CP-EW250N/CP-EW300N
Uploaded: Nov. 21, 2025, 7:22 p.m.
Warranty Information
Refer to the User's Manual (concise) for warranty information.
Power On/Off
1. Connect the power cord firmly. 2. Ensure the POWER indicator is steady orange. 3. Press the STANDBY/ON button. The POWER indicator blinks green and then turns steady green when the projector is ready.
Selecting Input Signal
Press INPUT on the projector or specific input buttons (VIDEO, COMPUTER) on the remote control to cycle through or select the desired input source.
Adjusting Picture
Use the MENU button to access Picture settings (BRIGHTNESS, CONTRAST, COLOR, etc.) and the cursor buttons to adjust them. Features like ASPECT ratio, KEYSTONE correction, ZOOM, and FOCUS can also be adjusted via the remote control or menus.
Other Operations
Functions like FREEZE, BLANK, MAGNIFY, and using the remote as a PC mouse are available through dedicated buttons on the remote control.
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 | |
| Neither sounds nor pictures are outputted. | The signal cables are not correctly connected. Correctly connect the connection cables. | 12~14 |
| Neither sounds nor pictures are outputted. | Signal source does not correctly work. Correctly set up the signal source device by referring to the manual of the source device. | - |
| Neither sounds nor pictures are outputted. | The input changeover settings are mismatched. Select the input signal, and correct the settings. | 23, 24 |
| Neither sounds nor pictures are outputted. | 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 |
| Sound does not come out. | The MUTE function is working. Restore the sound pressing MUTE or VOLUME +/- button on the remote control. | 22 |
| Sound does not come out. | 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, 49 |
| No pictures are displayed. | The signal cables are not correctly connected. Correctly connect the connection cables. | 12~14 |
| No pictures are displayed. | The brightness is adjusted to an extremely low level. Adjust BRIGHTNESS to a higher level using the menu function. | 36 |
| No pictures are displayed. | 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 |
| No pictures are displayed. | The BLANK screen is displayed. Press BLANK button on the remote control. | 31 |
| 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 NORMAL, and set AUTO ECO MODE to OFF, in the SETUP menu. | 47 | |
| Pictures appear blurry. | The lamp is approaching the end of its product lifetime. Replace the lamp. | 76, 77 |
| 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 | |
| Pictures appear blurry. | The lens is dirty or misty. Clean the lens referring to the section Caring for the lens. | 80 |
| 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 NORMAL, and set AUTO ECO MODE to OFF, in the SETUP menu. | 47 |
| Some kind of image degradation such as flickering or stripes appear on screen. | The OVER SCAN ratio is too big. Adjust OVER SCAN in the IMAGE menu smaller. | 40 |
| Some kind of image degradation such as flickering or stripes appear on screen. | Excessive VIDEO NR. Change the setting of VIDEO NR in the INPUT menu. | 42 |
| Some kind of image degradation such as flickering or stripes appear on screen. | 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. | 48 |
| RS-232C 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. | 63 |
| NETWORK BRIDGE function does not work | The NETWORK BRIDGE function is turned off. Select NETWORK BRIDGE for COMMUNICATION TYPE item in the OPTION - SERVICE - COMMUNICATION menu. | 63 |
| Network does not work | The SAVING function is working. Select NORMAL for STANDBY MODE item in the SETUP menu. | 48 |
| Schedule function does not work | The SAVING function is working. Select NORMAL for STANDBY MODE item in the SETUP menu. | 48 |
| Schedule function does not work | 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. | 68 |
| 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. Check the network connection and remove the loop by disconnecting the LAN cables such that there is only one connecting cable between two hubs. | - |