Maintenance method of Jiuyang soybean milk machine
1, connect the power, but the soymilk machine can't give an alarm. The buzzer is aging, so it should be replaced. The computer board is affected with damp, and the method is the same as the fault. Improper use, water enters the fuselage, and the computer board is short-circuited. The method is the same as above. The secondary coil of the transformer has poor contact with the computer board. Check whether the plug of the secondary coil of the transformer is connected with the computer board for a long time, and the transformer is burnt out. Replace the transformer.
2. If the soymilk machine is electrified but cannot be heated, and the motor does not turn, the series motor in the fuselage will be affected with damp, and the coil will be short-circuited, so the series motor should be replaced, and the relay can't absorb the broken leg, so the relay should be replaced. The continuous use time is too long, which leads to the high temperature of the series motor. The motor should be turned off, suspended and allowed to cool slowly. Improper use leads to water in the fuselage and local short circuit of the computer board.
3, pay attention to listen to whether there is a relay pull-in sound when entering the heating process in sequence, analysis and maintenance: start the working procedure after electrifying. If yes, check the heating pipe after power failure; If the heating tube is normal, disconnect the heating tube H from the circuit and check whether the contact of relay K2 is normal. If there is no relay snap sound, check whether there is a voltage of about +5V at the U 1② pin, and check whether R 13Q2K2D6 and R 15C 15 are normal.
4. Power-on inspection, analysis and maintenance: the resistance between the L and N copper plates of the static power coupler is1.69 kQ. Disassemble the machine head. C 1 has no voltage at both ends; Measure the voltage between two welding points of AC low-voltage input line on the main board; During the power outage inspection, it was found that the plug seat CNl was seriously corroded. After replacing it with a qualified plug socket, it works normally. This fault is multiple faults, and the newly listed products have been improved to directly weld the transformer B 1 to the motherboard.
5. Start "Dry Bean" II [There is no relay pull-in sound when making the program. Disassemble the nose, analyze and repair: after investigation. Disconnect the motor M and the heating tube H from the circuit, power on to start the "dry" working sequence, and 15s tests that the voltage at the foot ④ of the single chip microcomputer is +5V, which is normal. When measuring Q 1 base voltage of 0V, it should be about +0.7v power failure. It is found that one pin of R 14 is broken. The machine returned to normal after replacing it with a qualified 5.6kll resistor.
When we use the soymilk machine, we need to deal with some minor problems of the soymilk machine. The above is the maintenance method of Jiuyang Soymilk Machine introduced by Xiaobian today and what are the reasons?