philipshadow
- Oct 29, 2020
- 36
- Joined
- Oct 29, 2020
- Messages
- 36
ohkayIt seems that the switch is closed when the door to the equipment is closed. It's odd that the positive output of the power supply is connected to the chassis?
not necessarily the voltage to neutral.
Read again what I said.if they're measuring mains, there really is no option on a single phase supply
if they're measuring mains, there really is no option on a single phase supply
Op, when you measure each side of a particular load with reference to neutral and you get 250v on both sides, it simply means there is a circuit through the part but no neutral to complete the circuit..
hmmmm. It a microwave from sony i am trying to repairAlso very strange the neutral is being switched rather than the Live.?
Read again what I said.
Yes, i have checked the switches and the door relays. i have a similar schematics but one of the board is missing from it but all others are the same. All are good according to my test using the schematics as baseline for my measurement.Are you sure you should be playing with 240 volts? It doesn't seem like you should from your questions.
Have you checked the door switches with the oven unplugged and door closed and open?
Martin
The issue is no display. The lamps in my house and other houses were flickering one night and i was awake by then. suddenly i saw a spark at the microwave. By then it was on standby. after the spark the standby display which was a timer that flashes was no more appearing. I opened the microwave and found the varistor in the control board dead had cracked and dark spot underneath the control board. i changed the varistor but still no display.i have checked all other components and they check out good. however there is a transformer on the power board that is not producing any secondary voltage but i dont know how many voltages that transformer has to produce. i have posted it in another thread titledI have not read what the actual fault is.
Martin
Not at all, it may have several. The schematic you provided for T1 has only one output.ohkay does it mean this transformer only produces one voltage
ohkay please check the transformer and comment on it https://www.electronicspoint.com/forums/threads/help-identifying-output-voltages.295417/Not at all, it may have several. The schematic you provided for T1 has only one output.
Here for example is a multi-tap:
Martin
Then you seem to have not understood what I said.I read it right first time and my answer still applies.