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**Q: Some users' fingerprint access control often fails to pass the verification. How can this problem be solved?**
A: There are several possible reasons why some users may have trouble with their fingerprint access control. For instance, if the fingerprints on certain fingers are flattened or have too many creases, it might lead to failed recognition. Similarly, if the skin is peeling or the fingerprint is not clear, the system may not be able to match it correctly.
To resolve this, users who experience issues can try deleting the problematic fingerprint and re-enrolling it using a better-quality print—preferably one that has fewer wrinkles, no dry skin, and is clearly visible. It’s also recommended to place the finger over a larger area of the sensor during registration and perform a comparison test afterward. Additionally, registering multiple backup fingers can improve the chances of successful access.
For those who still face difficulties, the access control system often offers alternative options such as 1:1 verification mode and password entry. These can be enabled for specific users to ensure they can still gain access even if their fingerprint isn't recognized.
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**Q: When the access control machine cannot communicate, what are the reasons?**
A: Communication issues between the access control machine and the computer can occur due to several factors. First, the communication port settings may be incorrect—such as selecting the wrong COM port. Second, the baud rate on the computer might not match the one set on the access control device. Third, the access controller may not be properly powered or connected to the computer.
Other common causes include incorrect terminal numbers being entered, faulty data cables or converters, or even a damaged COM port on the computer. If the issue persists, checking the physical connections and ensuring all components are functioning properly is essential. In some cases, testing with a different cable or computer can help identify the root cause.
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**Q: After the access controller is powered on, the liquid crystal display is incomplete. Sometimes it only shows half, and sometimes the screen is displayed. How can I solve this problem?**
A: This issue could be caused by either a faulty motherboard or internal LCD characteristics. In some cases, the display may not function properly due to manufacturing defects or aging components. If the problem persists, it's best to contact the supplier or service provider for further assistance. They may recommend replacing the unit or sending it in for repair.
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**Q: How to clear the administrator of the access control?**
A: To remove an administrator from the access control system, you need to connect the access control machine to the management computer. Once communication is established, navigate to the "Access Control Management" tab. From there, look for the "Clear Administrator" option and click it. After the process is complete, disconnect the connection and restart the access control system. You should now be able to access the menu without any administrator restrictions.
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**Q: What is the reason why the chiming of the flute sounds when the access control communication is connected?**
A: If a chime or unusual sound is heard during communication, it could be related to the communication protocol being used. For RS-232 connections, this may happen if the baud rates on both the computer and the access control device do not match. For RS-485 systems, the issue could be due to reversed communication wires or shorted connections. Checking the wiring and ensuring the correct configuration can help resolve the problem.
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**Q: After the access control machine is turned on, it repeatedly shows 'Please press (leave) finger'. What is the problem? How to solve?**
A: This message usually appears when the system is unable to read the fingerprint properly. One common cause is a dirty or scratched fingerprint sensor. Over time, dust or debris can accumulate on the surface, causing false readings. To fix this, gently clean the sensor using a soft cloth or adhesive tape to remove any dirt.
Another possibility is that the fingerprint sensor is loose or disconnected. If this is the case, check the internal connections and secure them if necessary. In more severe cases, a faulty motherboard or damaged sensor chip may be the culprit, which would require professional repair or replacement.
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**Q: During the operation of the access control system, there is no problem in downloading the fingerprint and password data. However, when reading the access control record, it prompts a failure or an intermediate error. How can I solve this problem?**
A: This issue may be related to the communication link between the access control unit and the computer. Problems with the data cable, converter, or COM port could result in incomplete or failed data transfers. A simple solution is to reduce the baud rate of both the access control machine and the computer. Try setting it to 19200 or 9600 and attempt to read the records again. If the problem continues, consider replacing the cable or testing with a different computer.