ATM is a complex mechatronics equipment, composed of many parts.

The task of the diagnosis center is to quickly determine the cause and components of the fault, and quickly eliminate the fault so that the machine can resume normal work as soon as possible.

Before starting to troubleshoot, ask the operator about the situation of the ATM some time before the failure or the moment the failure occurs, and then ask the on-site maintenance engineer what methods and measures have been taken to repair. After understanding the on-site situation, for some simple faults, experienced engineers may have analyzed the cause of the fault and can provide remote technical support and guidance to the on-site engineer, and may be able to eliminate the fault. Even if the fault cannot be eliminated remotely, you can have a preliminary analysis of the machine fault before going to the site and make corresponding preparations (such as accessories, tools, etc.).
If you manually adjust the switch or disassemble the components without careful observation, the fault may become more serious. Therefore, carefully observe the indicator lights, transmission components, control boards, power cords and data cables and plugs related to the fault before you start to see if there is an obvious fault indicating the point of failure. This will help to find the cause of the failure as soon as possible.

The current financial self-service equipment is highly intelligent, and its self-diagnosis ability is strong. Some fault conditions and diagnosis results will be recorded in the ATM's electronic flow or printed on the transaction log. Carefully check the ATM's electronic log and print out the ATM. From the transaction log, it is possible to obtain useful information for troubleshooting.

If you cannot determine the point of failure by using the above methods to eliminate the fault, you must use the instrument to detect each part, whether the voltage is normal, whether the control board is normal, whether the components meet the standard value, and whether the data line is well connected, and use the instrument to determine The specific location of the fault.

Some methods can also be used in maintenance to speed up the search for fault points and improve maintenance efficiency.

1. Touch method: For some situations where the fault location cannot be determined by observation, you can feel it by touching it with your hands. For example, touching the surface of a chip or component can sense whether the chip or component is heating (in the power-on state), so as to know which chip or component is damaged or in a critical state. Touch the vacuum nozzle of the ATM cash-out module to know whether the vacuum pump relays the electromagnetic switch or not, so as to determine whether it is normal when the cash is sucked.
2. Comparison method: If there are normal parts that are the same as the abnormal parts, the difference between the two can be compared to determine the cause of the failure.
3. Substitution method: replace the suspected fault with a known normal component, and you can quickly determine whether the suspected component is indeed faulty.
4. The disconnect method cuts off the connection between the suspected faulty component and other components in the system, and then observes whether the other parts are working normally, which is also a way to quickly find the faulty part.
5. The listening method is also an important diagnostic method. By listening to the sound of the motor running, the sound of the fan rotating, the sound of the relay running, and whether it makes a normal sound under the corresponding conditions, you can judge whether some parts are working normally.

The operation after finding the faulty part is to replace the faulty part or disassemble the faulty part for repair. If the parts need to be disassembled and repaired, please pay attention to make all the ATM parts return to their original positions as much as possible during installation. If there is any deviation in the installation, it may cause other failures after maintenance or failure after a period of use.
If the card reader is disassembled and repaired and then reinstalled, the card sending channel must be carefully checked. Any deviation will affect the card transmission in the channel, and seriously affect the use of the card reader.