Question about Sharp R-1871 Convection Microwave Oven

2 Answers

Sharp R-1441 Some how I have done something to "lock" all the keys on the keypad. How can I unlock them, so the microwave is usable again? Also do you know where I can obtain a user's manual?

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  • Vicki Glisson Oct 04, 2006

    Sorry - there is no type of "help" button on the key pad. Any other suggestions would be appreciated.

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2 Answers

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  • Sharp Master
  • 9,179 Answers

There should be a "CUSTOM HELP" or "HELP" pad on the keypad. When you press that, "CHILD LOCK" should be the first option. The display will guide you to press 1 or 2, etc., to turn it off. We don't have an online copy of that manual, but it's part number TINSEB114MRR0 (zero on the end). You can order it via Tritronics at http:/www.wehaveparts.com

Posted on Oct 04, 2006

  • William Miller
    William Miller Nov 11, 2006

    You could call Sharp at 1-800-BE-SHARP and ask them if that model has a lock.

    Otherwise, if none of the pads are working, there may be some foreign substance on the circuit board or inside the layers of the keypad.

    Most commonly this is due to spray cleaner being sprayed directly onto the keypad. Cleaner should be sprayed on the cloth first, then use the cloth to wipe the keypad clean.

    If this is what has happened, then it may not be repairable. A handy person can remove the control panel frame and see if there's any liquid inside on or behind the panel. If so, it is possible to dry it out with an aircompressor or heat, but often that does not work.

    Another thing is to unplug the power at the mains for several seconds. Plug it back in and see if it works. A reset may do it. At power-up, the display should flash or show a text message. If not, a key may be stuck due to a foreign substance or a defective keypad.

    If certain keys are not working, there may be some foreign substance at the point where the green or blue plastic strip from the keypad plugs into the circuit board. To check that:

    1. Be sure the oven is disconnected from the power line while you are taking it apart.

    2. The keypad connection is the green or blue translucent plastic strip that plugs into a connector near the edge of the board.

    3. There are two tiny tabs (one on each side) of the connector that you can gently pull up on to unlock the connector.

    4. Then the keypad strip will lift out. Clean both sides of the end of the strip with alcohol-based cleaner if you like, but do not use ammonia-based cleaner. Dry the end of the strip.

    5. Put the keypad strip back in, making sure both sides are down fully.

    6. While holding the strip down, push the connector back down to lock it.

    7. Try the keys again with the door closed.

    Also, you must have the door closed for the START button to work.

    Hope this helps.

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To: Misty From: Brenda 4/4/08
I don't know if you ever got a solution to your problem, but I have a Sharp R-1440 and called Sharp. The solution to unlock the microwave was. Press "Time Clock", then press "1", then press "Stop/Clear". Voila!

Posted on Apr 04, 2008

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1 Answer

Frigidaire microwave key shows a lock and no keys work


Here is a previous answer that might be of help.......

The first thing I would suggest is a hard reset. Unplug the unit for a minute or so. Then plug it back in, set the clock and try again.

If it is still locked or goes into lock mode by itself, the "clear" key on your keypad may be shorting.
Here's how the child lock works on model FMV145:

Child Lock-Out
You may lock the control panel to prevent
the microwave from being accidentally
started or used by children.
To lock or unlock the controls, press and
hold CLEAR/OFF for about three
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locked, an "L" will be displayed to the
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When I attempt to enter anything with the keypad the display says "locked". Is there some way to unlock it.


Many microwaves have children locks. Of course they are for safety reasons. they are for tricking the little kids from playing with the big people toys.

Process A
To Turn the Control Lockout Feature On or Off:
  1. Make sure the microwave oven and timer are off.
  2. Press and hold the CANCEL keypad for 3 seconds.
  3. 2 tones will sound and "LOC" or a padlock icon will be displayed (indicating the control is LOCKED).
  4. Repeat to unlock. Again, 2 tones will sound.
Process B
To Turn the Control Lockout Feature On or Off:
  1. Make sure the microwave oven and timer are off.
  2. Press and hold the START keypad for 5 seconds.
  3. 2 tones will sound and "L" will be displayed (indicating the control is LOCKED)
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The first thing I would suggest is a hard reset. Unplug the unit for a minute or so. Then plug it back in, set the clock and try again.

If it is still locked or goes into lock mode by itself, the "clear" key on your keypad may be shorting.

Here's how the child lock works on model FMV145:

Child Lock-Out
You may lock the control panel to prevent
the microwave from being accidentally
started or used by children.
To lock or unlock the controls, press and
hold CLEAR/OFF for about three
seconds. When the control panel is
locked, an "L" will be displayed to the
extreme right.

You can find your manual here.

If you think the controller or keypad may have failed, see us here or order parts here.

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

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F3 on a GE / Hotpoint microwave means you have a shorted membrane keypad.

Since it's a basic counter top microwave, this may not be worth repair when you consider the cost of a new comparable unit.

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.

The part number of your keypad is
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Good luck!

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

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Locked


The first thing to try is a "hard reset". Unplug it from the power line for a minute, plug it back in, set the clock, then try again.

It may be a failed keypad. If so, the unit cannot be repaired since the key unit is no longer available.

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

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