Induction cooker backgammon C205 type 5v18v320v normal button panel can not be operated light does n

It should be that the induction cooker backgammon is faulty and not opened, and it should be a short circuit in the circuit.

If the induction cooker says that the operation panel cannot be operated, it should be that the operation panel is out of order, you can turn it back on after powering it off.

If the induction cooker, he is in this normal case of backgammon, ** if the operation light is not on, it may be because the wiring in it is short-circuited, so he will not talk about it.

The panel cannot be operated, which should be a problem with the circuit wires, which makes the corresponding input control unable to be carried out.

Hello, this situation may be due to a hardware error in the operator panel.

It is recommended to replace or repair.

The induction cooker cannot be operated in this situation, and the light does not light up because of its internal failure, so you can find a professional master for effective maintenance.

If you measure all the voltages of the entire induction cooker, and the panel still does not have an operation sheet. Can we check whether there is a virtual soldering cable on the circuit board and whether the cable is loose?

It should be to take the induction cooker apart to see what the fault is, and find a master to repair it.

There should be many kinds of keys for any induction cooker backgammon.

Induction cooker backgammon C205 type 5 fly 18 fly 320 fly normal, the button panel can not be operated, the light is not lit The control panel can not be operated, if the light is not on, then there must be a problem with this induction cooker.

7V voltage, SMD capacitor.

C13 breakdown, or damage to U2A, can result:

Induction. When heating, there is a fault of "no alarm, no seepage and rotten heating", and it can be restored to normal after replacing the damaged components.

3. There are many brands of induction cookers, and they are measured.

Comparators. lm339

The +5V voltage from the output terminal of pin 1 of U2B to ground is normal. If the voltage is 0, then the 7th pin of U2B is the inverting input, Q4,

Zener diodes.

Z1 and IGBT are tested for forward and reverse resistance on the road. In the MC-SY1913, MC-SH2115 and other induction cookers of Cong Leakage, when Z1 and IGBT leakage, there is a "alarm not heating" fault, and the voltage to the ground.

If the output terminal of the second pin of the comparator LM339 (U2A) is low, or the U2B is damaged, the voltage to the ground + is normal. If the voltage is 0, the voltage to ground at the non-inverting input terminal of pin 5 of U2A is low. When z1;

Alarm not heating is one of the most common failures. It will lead to the failure of "no alarm and no heating" when the induction cooker is heated, and it may return to normal after replacing the damaged components, and the resistance between the IGBT control pole G and the emitter E becomes smaller, then there is leakage in Z1 and IGBT.

Surge protection. Circuit maintenance and drive.

Amplification circuits. Maintenance: When synchronizing the voltage.

Oscillation circuits. However, the principle is similar, chip capacitor C16 breakdown, drive amplification circuit, synchronous voltage oscillation circuit. If the voltage rises to 10V, the 5th non-inverting input terminal of U2A is +4 to ground and the surge protection circuit.

The +3V voltage of the non-inverting input terminal of pin 5 of U2A to ground is normal. If +, then.

SMD resistors. The R42 open circuit is damaged or broken. If it breaks down, there will be a "no alarm and no heating" fault when lifting the pot. [MG-EP201 (

Catalog number. EH202B) induction cooker, Midea induction cooker.

Common faults. When the induction cooker has a "alarm not heating" fault, the fault range is; Power supply.

High voltage power supply. A circuit, one of its components.

Poor contact. The 7th pin of the U2B non-inverting input terminal is to the ground +

The 4V voltage is normal. If it is low, R13 (240K 1WR14 (240K 1W), R15 (240K 1W), R16 (470K 2W), variable value or open circuit. If the voltage is 0, the chip capacitor C8 will break down or be damaged, which will cause the "alarm not heating" fault when the induction cooker is heated.

1: When standby after power-on, synchronous voltage oscillation circuit maintenance;

When the standby is normal after power-on. After powering on, standby, test the transistor.

Q3 collector voltage to ground +18V is normal. Use the "three-purpose meter sensitive belt" resistance 100 gears, for the triode Q3

There are many brands of induction cookers, but the principle is almost the same, and Midea induction cookers have common faults; Alarm not heating is one of the most common failures. When the induction cooker has a "alarm not heating" fault, the fault range is; When the power supply high-voltage power supply circuit, drive amplification circuit, synchronous voltage oscillation circuit, or one of the components is poorly contacted, or damaged, it will lead to the "alarm not heating" fault when the induction cooker is heated.

1. Maintenance of synchronous voltage oscillation circuit; When standby after power-on, the +5V voltage of the output terminal of the first pin of the comparator LM339 (U2B) to ground is normal. If the voltage is 0, the voltage to the ground at the non-inverting input terminal of pin 7 of U2B is low, or the U2B is damaged. The +4V voltage of the non-inverting input terminal of pin 7 of U2B to ground is normal.

If it is low, R13 (240K 1WR14 (240K 1W), R15 (240K 1W), R16 (470K 2W), variable value or open circuit. If the voltage is 0, the chip capacitor C8 breaks down. It will lead to the failure of "no alarm and no heating" when the induction cooker is heated, and it may return to normal after replacing the damaged components.

2. Surge protection circuit maintenance: when standby after power-on, the output terminal of the second pin of the comparator LM339 (U2A) is normal to ground + voltage. If the voltage is 0, the voltage to ground at the 5th non-inverting input terminal of U2A is low, and the chip capacitor C16 breaks down.

If the voltage rises to 10V, the 5th non-inverting input terminal of U2A will be connected to ground + voltage, and the chip capacitor C13 will break down, or U2A will be damaged. The +3V voltage of the non-inverting input terminal of pin 5 of U2A to ground is normal. If +, the chip resistor R42 open circuit is damaged, which will lead to the failure of "no alarm and no heating" when the induction cooker is heated, and it can be restored to normal after replacing the damaged components.

3. Maintenance of drive amplification circuit: when the synchronous voltage oscillation circuit and surge protection circuit are normal. After powering on, standby, the voltage of the collector of the triode Q3 to the ground is +18V normal.

Use the "three-purpose meter" resistance 100 levels to test the forward and reverse resistance of the triode Q3, Q4, Zener diode Z1, and IGBT on the road. When the resistance between Z1 and IGBT control pole G and emitter E becomes smaller, Z1 and IGBT have leakage or breakdown. In Midea's MC-SY1913, MC-SH2115 and other induction cookers, when Z1 and IGBT leakage, there is a "alarm no heating" fault.

If it breaks down, there will be a "no alarm and no heating" fault when lifting the pot. [In the Midea MG-EP201 (item number EH202B) induction cooker, when Z1 breaks down, there will be an "alarm not heating" fault], and the damaged components can be restored to normal operation after being updated.

Hope it helps.

I try to change the 5UF capacitor of the power supply filtering to a new one.

Try a different pan first, there may be a problem with the sensor.