Brand: JVC
Category: Action Camera
Document Type: Manual
Language: EN
Available Languages: EN , ES
Manual for TK-C920 / TK-C921
Uploaded: Nov. 21, 2025, 9:21 p.m.
Warranty Information
This product comes with a 12-month warranty against manufacturing defects.
Basic Operation
Powering On/Off: Connect the power adapter to the camera and AC outlet. The camera will power on automatically. Disconnect the power adapter to turn off.
Mounting the Camera: Securely attach the camera using the provided mounting bracket and screws. Ensure it is stable and oriented correctly.
Lens Adjustment: Use the lens adjustment ring to focus the image. Turn the ring clockwise for closer objects and counterclockwise for farther objects. ALC (Automatic Light Control) can be adjusted using the switch.
Connection: Connect the video output of the camera to the input of your monitor or recording device using a BNC cable. Power is supplied via the DC IN connector.
Back Focus Adjustment: For precise focus, especially in changing light conditions, use the back focus adjustment screw.
Troubleshooting and error codes
| Symptom | Possible Cause | Remedy |
|---|---|---|
| No Image | Power cord not connected | Connect power cord securely. |
| No Image | Improper video cable connection | Ensure BNC connector is securely attached. |
| Poor Image Quality | Lens dirty | Clean lens with a soft cloth. |
| Poor Image Quality | Incorrect focus | Adjust focus ring. |
| Flickering Image | Power supply issue | Check power adapter and outlet. |
| Flickering Image | Interference | Move camera away from potential sources of interference. |