Steren CCTV-080, Instruction Manual

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7. TROUBLESHOOTING
1. No sound while a call.
• Check the cable connection between the monitor and camera.
• The volume is at the lowest level.
2. Unclear image.
• Check the monitor brightness, it may be at the lowest level; adjust to another level.
3. The door cannot open.
• The cable to open the door is not connected or has short circuit , or the cable con-
nection between indoor and outdoor units is far or too thin, replace the cable with one
of better quality.
• Check that the electric lock is compatible with this device.
4. The date and the time are incorrect.
• If there is a power failure or a power outage, when the power is restored the time and
date will be incorrect, reconfi gure.