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How do i remove the membrane touchpad? - Thermador MBES Microwave Oven

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Every microwave oven I've seen has the touchpad permanently glued to the controller housing/front trim piece. To get this off, remove the top/side cover piece, then look for screws that hold the controller housing to the front of the oven. On some models, there is one screw at the top. After you remove that you can slide the controller up to unhook it from the oven frame. If there is a push-in door release latch in the housing, there is probably a screw or two at the bottom as well.

Now here is where it gets interesting. There is a flexible printed cable from the touchpad to the controller circuit board. To detach it from the board, you must first unlock the connector. There is a flanged collar on the connector. If you pull the collar up as if you were going to slide it along the cable (it only comes out a millimeter or so and hits an internal stop; it's part of the connector and is not supposed to be removed), that unlocks the connector and the cable slides right out. If the cable doesn't slide out, make sure you have both ends of the collar up to the internal stop. Now you can remove the screws that hold the controller onto the keypad and the removal process is essentially complete.

To reinstall the ribbon, slide it all the way into the connector and push the locking collar back down. Make sure the cable is in square and straight or the keypad may not work properly.

Caution: handle the controller board only by the edges. The controller chip(s) is very vulnerable to static electricity damage and can be ruined by a spark to the circuit that is too weak for you to feel the discharge. Avoid touching the contact area of the touchpad ribbon while inserting or removing it. (If you need to clean the ribbon contacts that go into the connector, it is OK to work on those while the ribbon is disconnected.) In some ovens, the controller chip is mounted directly on the board and covered with a soft rubber compound. These are especially delicate; it's too easy to break the fine wires inside that connect the chip to the board (but they're cheap to make!).

Posted on Mar 12, 2011

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You have a failing membrane keypad.

On some models you can order just the membrane keypad. It's more work, but it's cheaper.

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On other models, you have to order the control panel frame which comes with a new keypad already on it. This costs more, but it's an easy DIY job.

A YouTube video showing how to remove a typical over the range control panel assembly in under 5 minutes, is here.

40716d4.jpg

Some connectors have a lock.

positivelock.jpg
You can order GE parts from the Pros here.

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

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But in any case, you have a failed membrane keypad.

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It's actually a pretty easy do it yourself job.

At our Web site, we have a video available showing how to remove a typical over the range control panel assembly in under 5 minutes.

Next, disconnect the strip as shown in the photo below, then remove the screws that hold your circuit board in the old frame.

d00b1d2.jpg

Then carefully (since the display is made of glass) move your circuit board to the new frame, and reassembly is the reverse of disassembly.

You can find helpful exploded view diagrams and order parts by entering your full model number here.

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You have a failed membrane keypad.

If you (or someone you know) might want to replace it yourself, I have uploaded a handy guide with pictures showing you what's typically involved.
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 "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.

If you would like to have us do this repair for you, we do that for $39.95 plus part costs nationwide.

But please note that for some GE models, the membrane keypad is not available as a separate part, so you would have to order the control panel frame assembly which comes with a new keypad.

In this case, you simply move your circuit board into the new frame.
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Either way, we can let you know what your options and costs would be and send you other helpful info.

At our Web site, we have a video available showing how to remove a typical over the range control panel assembly in under 5 minutes.

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directly (and please remind me of your full model number from the tag on the unit) for more information & help.

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

William E. Miller, AS-EET
prototech@usa.net
http://www.microwavedisplay.com
Microwave Oven Control Panel Repair Nationwide

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