Question about Panasonic NN-C994S Convection/Microwave Oven

1 Answer

My PCB transformer primary is always blowing off what could be problem

I tried to replace PCB transformer the one which is behind display board. but always primary blows off. I suspect some sensor to be faulty viz. humidity/temp sensors. Can someone help to locate it and anyone has link to service layoout drawing please

Posted by on

  • rajendra panchal Apr 10, 2007

    Primary voltage is correct and even rating of transformer is correct.
    When i replace this transformer with new one , it worked for few days and I even measured all voltages at each point in secondry side , rely out any components failure.
    Now, only suspection remains is any component connected before primary side. Hence i need to know how this temp. sensor is connected , can u provide me general wiring diagram on microver close to model NNN -C 2000P panasonic

×

Ad

1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Superstar:

    An expert that got 20 achievements.

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

  • Panasonic Master
  • 9,098 Answers

Is your line voltage correct? That needs to be measured, perhaps even monitored. Is it possible you have installed 120 volt replacements into a 220 volt model? Otherwise, there is a component shorted on the control board, such as a rectifier diode, zener diode, filter capacitor, or transistor. This would call for old-style troublehsooting. It's possible you have a bad sensor, but I doubt it. They could be disconnected or bypassed for test purposes.

Posted on Apr 10, 2007

Ad

1 Suggested Answer

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi there,
Save hours of searching online or wasting money on unnecessary repairs by talking to a 6YA Expert who can help you resolve this issue over the phone in a minute or two.

Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.

Here's a link to this great service

Good luck!

Posted on Jan 02, 2017

Ad

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

Frigidaire microwave FFmv164lsa keeps blowing fuse


Disconnect connections at primary of the power transformer and try with a good fuse. If the fuse blows again, check crowbar microswitch in the latch assembly.

Dec 23, 2017 | Frigidaire Microwave Ovens

1 Answer

My microwave has no power,I have checked all fuses, switches and thermostats, i've replace the main control pcb. still no lights or display


pwr comes in, goes thru fuse to transformer which powers pcb and mag. pcb is not getting pwr. chk ur installation and the output from the transformer

Jan 25, 2016 | Microwave Ovens

1 Answer

GE Profile Microwave Fuse Keeps Blowing


First of all, be sure your AC line voltage is correct at the outlet, at between 105 and 125VAC. If not, call an electrician.

There should be a technical sheet hidden behind the controller or behind the grille or the oven. It's helpful when troubleshooting. If you don't find yours, e-mail me for a copy.

Next take a look at the fuse holder connections and wire terminal connections on the filter board where the fuse is.

Loose or charred connections can increase heat and resistance, leading to a melted fuse.

Also look at the terminals on the upper door switch, magnetron thermostat, and oven thermostat for the same reasons as above. (You'll probably have to remove the oven from the wall to get to the oven thermostat. Your installation instructions are here.)

It's not likely the trouble, but you can eliminate monitor interlock trouble by disconnecting one wire (probably the black one) from the middle door switch and trying your test again. (Ignore the bottom door switch altogether.)

For more free DIY and other help & advice, feel free to contact me.

William E. Miller, AS-EET
pupista@gmail.com
http://www.microwavecontrol.com
Microwave Oven Control Panel Repair Nationwide
"Recycling by repairing since 1982"

Mar 14, 2017 | GE Microwave Ovens

1 Answer

Hi, I have a JVM1490 that is dead. I have chased


There should be a "mini-manual" (tech sheet) hidden inside the unit
behind the control panel or hidden on the left side behind the grille, which is
very helpful when troubleshooting, testing, and locating components.


91758ea.jpg

It *may* have the part number of the low voltage transformer, possibly on a loose sheet inside the mini manual.

Otherwise, you can find links to helpful exploded view diagrams and part ordering help here.

I recommend that you bookmark that link to your favorites.

There should be a part number on the label of low voltage transformer.

The GE part number will be something like WB##x##### and the Samsung number will be something like DE_#######.

The Samsung part number is almost always cheaper.

Feel free to contact me directly if you need more help.
We're happy to help you with free advice and we'd appreciate your thoughtful rating of our answer.

May 13, 2010 | Microwave Ovens

1 Answer

Wont heat up


DISCLAIMER as in all Microwaves, there is a possibility of DEATH if you are familiar with troubleshooting of a Microwave and it is NOT ADVISABLE to trying to diagnose and repair this product by yourself. Now, that being said. Majority of the time on Maytag (which is built for Maytag by Samsung) the Magnetron will pre-maturely fail. There is always the possibility of a open fuse going to the primary side neutral of the High Voltage Transformer. Also the relay on the control PCB has to close as well for the High Voltage Transformer to operate. Unless you are extremely familiar with Electricity and Electronic troubleshooting, you can get in over your head extremely fast and small mistakes can lead to injury or death.

Mar 26, 2010 | Maytag Appliances Over-the-Range Microwave...

1 Answer

All power stopped working. no lights, etc.


This sounds like a blown fuse, unfortunately it is usually something else broken inside so just replacing the fuse probably wont fix it.You can try it though.The fuse is inside the cover, close to where the cord enters the microwave.It could be a lot of things creating a short circuit in there(loose, or damaged connection wire.bad transformer,or faulty control board would top my list) It's usually on the primary side of the transformer though.If stuff goes wrong with the high voltage side it usually doesn't blow the fuse.

Oct 11, 2009 | Microwave Ovens

1 Answer

Emerson Microwave stopped working


Have 1 of 2 choices, the main fuse or the control board for the front switches and clock. primary of the small power transformer has opened. Unplug the unit and take case off and measure the fuse with an ohm meter. if u read 1 ohm or less then fuse is good. then measure across the main power plug tips. If read open then the power transformer is bad. Need to replace the board as not sure if transformer is available.

Jul 26, 2009 | Emerson MW8102SS 1100 Watts Microwave Oven

1 Answer

Kenmore Micro/Oven fuse keeps blowing


Disconnect the connector to the primary winding of the high voltage transformer. Put a new fuse . If the fuse is not blowing the problem may be in the secondary side of the high voltage transformer. Chek the highvoltage diode, capacitor, magnetron respectively. you can also check the primary winding of the low voltage transformer.

May 23, 2009 | Microwave Ovens

2 Answers

NATIONAL NNN -C 2000P LOW VOLTAGE PRIMARY GETS FREQUENTLY OPENED


There is something on the secondary side which is drawing too much current. I would check all electrolytic capacitors, zener diodes, transistors, and voltage regulators.

Mar 27, 2007 | Panasonic NN-C994S Convection/Microwave...

1 Answer

High voltage surge


We regularly repair these GE / Samsung boards from customers nationwide with just such problems for $32.50. If it's too bad off, we can get this board (# WB27X10466 remanufactured) for $145. A new board runs about $180. We would need the full model number with suffix.

Sep 04, 2006 | GE JVM1490 Convection/Microwave Oven

Not finding what you are looking for?
Panasonic NN-C994S Convection/Microwave Oven Logo

Related Topics:

107 people viewed this question

Ask a Question

Usually answered in minutes!

Top Panasonic Microwave Ovens Experts

William Miller
William Miller

Level 3 Expert

9098 Answers

Donald DCruz
Donald DCruz

Level 3 Expert

17130 Answers

Jerry Greenberg
Jerry Greenberg

Level 3 Expert

1689 Answers

Are you a Panasonic Microwave Oven Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...