Panasonic NN-S541 Microwave Oven - Answered Questions & Fixed issues

I found sufficient information elsewhere.

Yes

Panasonic FAQ:The microwave oven model NNSA651S was manufactured in a way that the oven light turns on only while cooking. - FTStupid design!!

please follow this steps and fix it. God bless youLine FuseEvery microwave oven has a line fuse. This fuse is designed to blow if too much current is drawn through the microwave circuitry. The fuse can be replaced, but the underlying issue should still be investigated and resolved. Otherwise the new fuse will blow also.Main Control BoardIf the microwave is not working the main control board may be defective. This is not common. When a microwave stops working the problem is usually the line fuse or within the high voltage circuit; either the high voltage capacitor, diode, transformer or magnetron.Thermal FuseIf the microwave is not working the thermal fuse may have blown. It can be tested for continuity. Watch our fuse testing video for more information.ThermoprotectorIf the microwave is not working the thermoprotector may have tripped. This is a safety device to prevent the microwave from overheating. It can be tested for continuity to see if it's blown.

Panasonic NN SD696S (SS) popout knob style (Costco): Clicked off; first occasionally, then frequently, then always after couple seconds (click from relay on circuit board behind keyboard). Checked fuse solution--too sad--not the problem. Checked Fan and various areas with VOM; then noticed browning of the two connectors on micro-switch by door-interlock?. Switch (marked Omron V-15G-3C25, 15amp, 125-250VAC). Inside points showed bad arcing, hence the heat to char the connector insulation. Bypassing the switch, the microwave works fine--Eureka!--which will do until replacement. Found Grainger has (w/o min quantity of 100), for $2.21 (2KRF8)--hope to pick up one Monday. Switch is kept in place by two plastic "toothed" fingers--should pop right back in if dimensions prove to be identical.

clean it and check the wiring in the mains plug

Hi,
Here is a tip that will help you to figure out what is wrong with yourMicrowave Oven....

Microwave Oven Basic Troubleshooting Tips

heatman101 [
][
'
'

Hi,

Do you mean you want to replace light bulb for your microwave? If yes follow the instructions below;

1. PLEASE UNPLUG YOUR MICROWAVE!
2. Picture of your microwave with a phone or camera so that you don't forget how to assemble it back.
3. Remove the two screws that holds grill. They are located at the edge of the unit. Once the screws are out, rotate the grill forward from the top. It will pop right out.
4. Once the screws are out, rotate the grill forward from the top. The grill should pop right out.
5. Locate a small access cavity on the left.
6. Remove the screw that is located near the front of the microwave door.
7. Lift up the sheet metal floor to access the bulb. The bulb is located under the sheet metal "floor" on the left.
8. Place a flash light on the microwave floor and shine the light in the light area. This will help you see better when you replace your bulb.
9. Look for a small shiny reflector that hides the bulb. Use your two fingers to squeeze it a bit. Making sure not to bend it.
10. The bulb connection should come right out.
11. After you replaced the bulb, re secure the reflector and the sheet metal floor with the single screw. Test the bulb by plugging in your microwave.
12. Once you see that the bulb works. Unplug your microwave again and re attach the front grill. You are now done.

I hope this helps to solve your problem.

Good luck.

It really depends why it is smoking.
I, due to the model number, suspect the invertor board, but it could be all sorts.
Call an aproved engineer and get it checked.

Hi,

Here is a tip that will help you to figure out what is wrong with your Microwave Oven....

Basic Microwave Oven Troubleshooting Tips

heatman101

Hi,

Here is a tip that will help you to figure out what is wrong with your Microwave Oven....

Microwave Oven Basic Troubleshooting Tips

heatman101

Hi,

Here is a tip that will help you to figure out what is wrong with your Microwave Oven....

Basic Microwave Oven Troubleshooting Tips

heatman101

1. It is Panasonics way of selling parts and making money off of parts when it is never more than one thing. More than likely it is just one part. Like the control board. But it is hard to say without doing some testing. 2. It would cost way more than a new microwave to replace all of the parts. With parts and labor, it would cost around $1100 for parts and labor to replace all of the parts. But replacing just the part that is bad could be as little as $300. Depending on what failed to blow the fuse.

Either te magnetron has failed or the invertor has failed.
How long is a piece of string.
Ask a Panasonic Authorised Repair Centre for an estimate.

Due to the type and design of your microwave oven, consult an Panasonic authorised service centre.

www.panasonic.com for a list of dealers in your area.

H97, H98 and H99 appears in display window a short time alter start key is pressed and no microwave oscillation.

NOTE:

DO NOT try to REPAIR this Inverter Power Supply (U) and also DO NOT RE-ADJUST PRESET VOLUME on the board. It is very dangerous to repair or adjust without sufficient test equipment because this circuit handles very high voltage and very large current. Off alignment or inverter board operation is dangerous. Operating a misaligned inverter circuit is dangerous due to the very high voltage and current that is produced by this board. Defective boards must be replaced with a new one.

Hi,

H97 means that there's a problem with your inverter, magnetron, or digital programming circuit. It is suggested to contact a repair person to deal with this kind of problem to your unit as the repair involves high voltage to deal with.

Please accept the solution if it's helpful. Do get back to us for any further query.

Thanks for contacting fixya.com

Hi,
Here is a tip that will help you to figure out what is wrong with yourMicrowave Oven....

Microwave Oven Basic Troubleshooting Tips

heatman101

hjkhfk

H95, H97, H98 or H99 mean that there's a problem with your inverter, magnetron, or digital programming circuit.

Due to the lethal voltages used and produced, I do not recommend that an inexperienced person work on these.

You can find an authorized Panasonic servicer here. If you're not in the US, see Panasonic.net.

We're happy to help you with free advice and we'd appreciate your thoughtful rating of our answer.

No that is a very dangerous situation. What is sounds like is you had a short that blew apart but not completely damaging the wires. You should unplug, and open it if its out of warranty and inspect the wires. If the wires are partially burned it can heat up and cause an electrical fire.