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Connecting the Cameras

Optional

To install your camera:

1.  To separate the camera cover from the camera base, loosen the 

screws located on either side of the camera cover using the 

included Allen key.

2.  Use the included mounting template to mark holes for the mounting 

screws.

3.  Drill the holes and then feed the cable through the mounting 

surface or cable notch. 

 

NOTE:

 Insert the included drywall anchors if installing the camera 

in drywall.

Installing the Camera

Extend the cable run for your camera depending on the cable type used. 
Additional extension cables sold separately. See table below:

Connect the male power head 

and the BNC connector to the 

camera. 

Connect the BNC connector  

to a video input on your DVR.

Connecting the Camera

Cable Notch

LEV2750A_QSG_EN_R4

Problem

Solution

No picture / signal

• Ensure you have used the correct BNC 

connector for your DVR. Use the camera’s black 

BNC connector when connecting to Lorex HD 

DVRs, and the yellow connector for standard 

analog DVRs.

• Ensure connections are properly connected.

• Ensure the camera power supply is plugged in.

Picture is too bright

• Ensure your camera isn’t pointed directly at a 

source of light (e.g., sun or spot light).

• Move your camera to a different location.

Picture is too dark

• Check the brightness and contrast settings of 

the DVR or monitor.

Night vision is not working

• The night vision activates when light levels 

drop. The area may have too much light.

Picture is not clear

• Check the camera lens for dirt, dust, 

spiderwebs. Clean the lens with a soft, clean 

cloth.

• Make sure that the cable run is within the 

limitations specified in the section ‘Cable 

Extension Options’.

Bright spot in video when 

viewing camera at night

• Night vision reflects when pointing a camera 

at a window. Move the camera to a different 

location.

No audio

• Audio is only supported on Lorex HD DVRs. 

Ensure your camera is connected using the 

black BNC connector (see ‘Connecting the 

Camera’).

• Ensure DVR volume is turned on / turned up.

• Ensure audio function on camera is turned on 

(see ‘Disabling Camera Audio’).

• Ensure audio is turned up on viewing device.

Troubleshooting

ATTENTION: 

Test your camera prior to selecting a permanent mounting location by 

temporarily connecting the camera and cable to your DVR.

Before Installing the Camera

• Decide whether to run the cables through the  

wall / ceiling (drilling required) or along  

the wall / ceiling. 

• If you run the cables along the  

wall / ceiling, you must run the  

cable through the 

cable notch

 on  

the base. This will keep the camera  

base flush to the surface when mounted.  

Use pliers to break off the perforated metal  

tab on the camera cover, and then align the cable notch in the 

camera cover with the cable notch in the camera base.

Connect the female power 

head to the included power 

adapter.

Camera

DVR

Male Power

Female Power

Setup Diagram

BNC Video

12V DC Power

Camera

Extension Cable

Power Adapter

HD DVR

Cable Extension Options

Option

Cable Type

Max Cable Run 

Distance

1

Lorex model MCBL-60BNCU / MCBL-

60BNCU2 BNC Cable (included with camera)

60ft / 18m

2

‘RG59’ or ‘Coax’ or ‘Coaxial BNC’ Siamese 

(Video and Power)

300ft / 92m

3

‘RG59’ or ‘Coax’ or ‘Coaxial BNC’ (Video 

Only)

2

800ft / 242m

Notes:

1.  The extension cable must be a single stretch of cable between the 

DVR and camera. You cannot connect multiple extension cables to 

each other.

2.  For cable runs above 300ft / 92m (option 3), you must connect the 

power adapter directly to the camera, rather than at the end of the 

extension cable.

3.  Indicators that your cable run may be too long:

•  Video is permanently black & white (even during day time)

•  Video is unclear, soft, or distorted

4.  For more information on extension cables, visit 

lorex.com

Adjustment screw

A) Turn the lens  

holder up to 45° 

B) Tilt the lens  

module up to 90° 

C) Rotate the lens  

module 360°

4.  Connect cables as shown in the section “Connecting the Camera”.
5.  Mount the camera base to the surface using the  

provided mounting screws. Make sure  

all screws are fastened tightly.

6.  Use a Philips head screwdriver (not included)  

to loosen the lens module adjustment screw.  

Do not loosen all the way.

7.  Adjust the angle of the camera  

as needed:

01

01

01

Mounting Surface

Mounting Template

Drywall Anchors

Mounting Screws

Camera Cover

Camera Mount Screw

8.  Tighten the adjustment screw when finished.
9.  Cover the camera base with the camera cover. 
10.  Tighten the screws on either side of the camera cover.

Connecting the Cameras

Disabling Camera Audio

ATTENTION: 

Audio recording without consent is illegal in certain jurisdictions. Lorex 

Corporation assumes no liability for use of its products that does not 

conform with local laws.

Audio is enabled by default. To disable camera audio through a Lorex HD DVR:

1.  In Live View, double-click the camera channel to open in full-screen. 

2.  Right-click and then click 

PAN/TILT/ZOOM

. Enter the system user name and 

password if prompted. The PTZ menu opens. 

 

NOTE:

 If prompted, set the control mode and protocol for the channel that the 

camera is connected to in the 

PAN/TILT/ZOOM

 setting page. 

3.  Click the arrow in the PTZ control window to show advanced controls.
4.  Click 

. In Menu Operation, click 

Enter

. The OSD menu appears over the camera 

image.

5.  Select the 

Advanced

 menu using the on-screen controls.

6.  Select the 

Audio Mode

 option and choose 

OFF

.

7.  Click 

Enter

 

NOTE:

 These instructions are based on current Lorex HD DVR interface. If you are 

not able to access your DVR’s OSD menu by following these steps, please use the 

instructions in your DVR manual instead.

For optional connection to 

standard analog DVRs

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