POS common fault analysis and processing methods!


1. When the POS settlement, the previous day transaction will be brought out or the reconciliation will be unfair.

Cause and treatment: This is caused by imperfect POS terminal software. Software failure is not a hardware failure. According to the POS terminal software requirements, after the POS terminal receives the host day-cut flag, the POS terminal must retrieve the new work key from the host. This is what we call the POS check-in every day. At this time, the POS machine must settle and clear the water yesterday. Then you can make new flow operations. If the POS settlement brings out yesterday's running water or multiple days of running water, it means that the POS terminal only performs the key exchange action after receiving the daily cut flag and does not clear the running water action. In this case, the POS is prone to overflow and the POS flow number is incorrect and the reconciliation is inconsistent. The settlement does not match. If the water is not cleared yesterday or the current water is cleared in advance and the water is lost, the settlement will not be met. Inconsistent settlement does not affect POS transactions and merchant funds.

Second, POS multiple card transactions display "invalid card number"

Cause: The reason for the invalid card number is that the POS machine head has not read the three track information on the magnetic stripe card. After the host returns, the invalid card number will appear on the POS machine screen.
Solution: First, if the POS machine cannot read the magnetic stripe three tracks or two tracks for all the magnetic stripe cards, you can use the cleaning head special card to clean the head and read the card normally. If it still cannot be read, It is necessary to replace the magnetic head; second, if the magnetic stripe three tracks are lost, the magnetic card must be replaced; the third is to draw the card at a constant speed.

Third, the telephone line makes the call normal, but the current interference of the "shasha" in the call is very loud, and the POS transaction prompts "connection failed" or "accept failure"

Reason and treatment: Try to replace a new machine and judge whether it is a machine problem or a line problem. If it is a line problem, it is necessary to check whether the line is damaged. If it is a line problem, it is necessary to check whether the line is damaged or not. The wiring with the outside line is not standardized (whether there is rust at the wiring, resulting in poor contact). If it is a machine problem, the lightning protection tube on the main board of the machine is generally broken, and only the machine can be replaced.

Fourth, POS prompts "communication failure", "Please check the telephone line" without dial tone", etc.

Symptom: During the use of the merchant, the POS prompts "communication failure", "please check the telephone line", etc., the transaction is normal. After the fault prompts, the merchant checks that the telephone line can be dialed normally, and the POS telephone line The interface is correct. Do reboot and start signing in again. If the sign-in is successful, the transaction still prompts "communication failure", "Please check the telephone line" and so on.

Reasons and solutions: Prompt "Please check the telephone line", different manufacturers POS machine tips are not the same, but the same is similar, the meaning is similar. Please check that the telephone line is caused by POS and telephone line. First, the telephone line is not connected to the POS port. When communication is required, please check the telephone line and plug in the telephone line. Second, the telephone line is connected to the POS. However, the connection between the telephone line and the POS machine is incorrect. Please promptly check the telephone line when communicating. The connection is correct. Third, the attached telephone is not placed. The telephone has no long tone or busy tone. Please prompt to check the telephone line when communicating. Put the phone attached or re-install the phone correctly. Fourth, the modem tone dialing fails, the modem hardware is faulty, the voltage on the phone line cannot be detected, and the communication line prompts to check the phone line fault, in order not to affect On-site cardholder transaction, the POS tone dialing can be changed to pulse dialing to solve temporarily (not 100% effective, but can solve part of it, can also test whether the modem is completely faulty); Fourth, when the time is good, please check the telephone line And often this, indicating that the modem has components with solder joints or circuit instability or device criticality State, completely solve the need for repair.

Five, POS prompt card reading error or invalid card, etc.

the reason:
1) Magnetic card weak magnetic, magnetic card itself
2) Check if there is strong magnetic field interference around the machine when swiping, if necessary, please remove the relevant strong interference objects.
3) For some machines, it is good or bad when swiping. This kind of machine is generally used for a long time, the magnetic head is too dirty, and the magnetic head can be cleaned by a special magnetic head cleaning card, and the problem can be solved. Proper card swiping: Make sure that the card slides smoothly and evenly along the card slot when swiping, not too fast and too slow. The card speed range is between 20mm/sec and 60mm/sec. In general, the weak magnetic card is in the fast brush state. The card reading effect is better. Magnetic card weak magnetic, magnetic card itself

6. The cardholder displays “Personal Password Error” after entering the password.

the reason:
1. The password does not match the card number.
2. The card information is not correctly read and processed:
1. Please re-enter the correct password
2. It may be that the magnetic stripe information of the customer card is not very good. If there are conditions, try changing the card.
The transaction was successful but the order was not successfully resolved:
1. The split printer checks if the printer power and connection are normal;
2. Reload the paper correctly and use the “Reprint” function to replay the purchase order.

Seven, POS transaction or sign-in prompt "A0 key verification error"

Solution:
1. Please sign in again.
2. Also return A0 when signing in, please record, the key has been lost.
The pos machine displays "printer jam"
cause of issue:
1) The paper is not loaded
2) Printer core failure
3) There are stolen goods in the printer
4) The printer core is dirty
5) There is a problem with the pos board
6) The needle of the print head shrinks back and forth. Suggested treatment method:
1) Reload the paper (small hole to the left, large hole to the right, insert on the reverse side)
2) Replace the printer core
3) Clean up the booty
4) Add some lubricant to the printer mandrel
5) The motherboard needs to be repaired
6) Add lubricant to the position of the print head

8. The cardholder can use it normally on the ATM and display the "invalid card number" on the pos machine.

The cause of the fault: the cardholder's card is in contact with the magnetic object. The magnetic stripe is weakened and is used on the ATM machine. It is a static reading card information, but it is a dynamic reading method on the POS machine. Therefore, ATM card reading. The ability is better than the POS machine to recommend the processing method: contact the card issuer

Nine, POS printed outsourcing order misplacement

Cause: The printer core is dirty or the printer core is bad. Suggested troubleshooting method:
1) Clean and repair. Check if there is any foreign matter in the movement. If there is abnormal noise when shaking, remove foreign matter.
2) Return the machine to the branch for repair

Ten, 56X0 exists every time dialing a few times to succeed or always shows timeout, and P80 does not exist a phenomenon

cause of issue:
1) pos machine telephone line access port is incorrect
2) The pos communication parameter setting is incorrect.
3) Telephone line problem
4) too many lines are connected to the pos machine
5) pos machine fault suggestion method:
1) Connect the telephone line to the POS machine, corresponding to the interface
2) Make the correct settings
3) Check the telephone line. Please pay attention when checking: It is not that you can call. The Pos fleet telephone line requires more stringent calls than usual. Among the current network providers, telecommunications is the best. You can use the replacement method when processing, that is, change the machine to a line that can be traded normally to eliminate the problem of pos or the problem of unstable circuit.
4) If there are too many branches, it will cause the line to be occupied.
5) Return to the company for processing

11. When the MISS keyboard is checked in or traded, “Y5 and password keyboard communication fails, Y8 communication link is abnormal, etc.”

Solution:
1. If “Y5 and password keyboard communication fails” during the transaction, please check if the password keyboard power is normal, then check if the cable behind the cash register is connected according to the correct method. Check whether the serial port number of the password keyboard of the configuration file is set. Correct, check the hardware configuration of the computer serial port, whether the IRQ conflicts.
2. If there is a communication prompt such as “Y8 communication link abnormality” “Z1” during the transaction, please check whether the mall LAN, server, router, UnionPay host address can communicate normally, use PING command.

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