Electromagnetic furnaces have problems, such as non-opening, alarms but no heat, error codes on screens, heat breaks, control panels, etc。
The circuits in the electromagnetic furnace are complex, with electrical power lines, major hotlines, pot detection lines, igbt-driven lines, synchronized lines, current monitoring lines, over-pressure protection lines, electrical grid monitoring lines, etc., causing a real headache. How do we do this? Is there a way
First, the button was pressed and the fuse was burned。
Large power parts are often burned, and most of the problem is caused by the disruption of cockroaches, which results in a short-circuit leak between the legs of the parts。
One, open the shell and clean up the groceries on the circuit board
Two thousand meters to the diode measuring slot to check if igbt power tubes were burned。
The 3 power pipe is broken and usually the whole bridge is broken。
If the circuit board is clean, we'll have to keep looking down:
It is also necessary to check whether there is any problem with the 1gbt power piping, and if conditions permit, it is best to replace it。
See if that +300v filter is out of capacity or out of power。
Did the vibrator fail or leak
Did the seven-plus-eighty-five-voltage tube burn down
At the eighth point, we have to see if the circuit boards have been burned, which is often overlooked。
9 to see if the power supply is burned。
To check if the power chip is broken, it can be moved to the diode slot using a one-size-fits-all watch to check whether it has been hit between the foot and the ground。
After looking at these places, replace the broken parts, then add a incandescent light bulb to the fuse, and look at it. If it's normal, you can put the fuse back into the machine。
Second, if there's no response after the launch and the fuselage hasn't broken, it's up to you。
It is clear that the power is either not working or not working properly。
See if the power lines and plugs are broken
2 check the limit-to-flow resistance on the power supply to see if it has changed or is broken。
3. Turn on the power supply and check if the +300v, +18v and +5v voltage is normal so that it can be expected to know where the problem is and then see exactly which part is wrong。
In the absence of +5v voltage, check the components responsible for filtration and the components 7805。
If there is no +18v voltage, check the flow filter component of this circuit and the +18v steady pressure diode。
Without a 300v voltage, it is necessary to check the current and filtering components。
If no +18v and +5v voltage were observed, then the power management chip and its power supply would have to be checked。
Three, call the police as soon as it's on, but it's not hot
First, we need to see if all three important voltages are normal。
Is the +300v voltage normal
The +18 and +5 volts are normal。
If there's no problem with the voltage, let's see what the failure code says。
Check the surface temperature sensors of a, e1, e2, e3 to see if their resistance values have changed and should normally be around 100 k。
Check the input port on the main chip that receives the temperature sensor data on the surface to see if there has been any change in the electrical resistance and capacitation elements there。
Check e4, e5 and e6 to see if there is anything wrong with the surface temperature sensors of igbt。
See if the temperature sensors on the master chip lgbt enter small resistance and capacitation in that part, and whether the values have changed or the electricity is leaking。
See if there's anything wrong with the wind machine, and see if the vent is blocked, which causes the machine to get too hot。
Both c and e0 are the most common failures and have many impacts。
E0 represents a failure to detect potware, which indicates a failure of electrical circuits。
The pan function is widely applied。
Heating the main road
The main thing is to check the resonance, the igbt power tube and the +300v filter。
B. Concurrent circuits
It's the most vulnerable thing。
C. Circuits used to drive igbt
Main check drives the tube and its bias resistance。
D. Primary control chips
It's durable
E the three main levels of voltage。
If there are three cases of abnormal voltage, it's definitely a problem with the pot, and if it's not detected, it's an e0 error。
Mainly check and add components such as 300 volts filter capacitors。
Iv. Intermittent heating
Let's see if there's any place for concronx without a welding
Let's see if there's a problem with the dialer
3300 v is unstable. Find out where the problem is
The 4 machines are too hot to trigger high temperature protection to see if there are problems with fans and vents。
V. The screen is dead
You can't use the button if it's broken. It's not working. It's leaking。
Panel 2 failed because of power failures in signal lamps or digital tubes。
Panel 3 leaked electricity because it was dirty and dusty, which made it impossible to operate properly。
It's not easy to fix an electromagnetic furnace, though it's a domestic appliances, is it
