Question about Office Equipment & Supplies
What is needed are the numbers associated with the unit. You will need the brand, both model and serial (if it has one). Then the board needs to be described in detail, size, and so on (possible numbers on the board as well, may help).
Go to the Internet and search for your model you have, asking for the circuit board information. You may be able to find a repair or service manual for this unit on the NET.
Search for "service manual" or "repair manual". One of those will bring some results.
Posted on Jul 26, 2008
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Posted on Jan 02, 2017
Tips for a great answer:
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THE MICROWAVE !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
2. 1. Remove the top front cover by removing the (2)
screws that are along the top edge (phillips).
3. 2. Slide the cover to the left about a half inch
(there are tabs holding the cover in place) and remove.
4. 3. Remove (1) screw from the top of the Keypad
Housing (phillips). Lift the Keypad Housing upwards about half an inch (there
are tabs holding the Keypad Housing in place) and remove. Be careful of the
metal grille that is just above the Keypad Housing as this may fall out since
it is being held in place by the Housing.
5. 4. Be careful not to pull on the wiring harnesses
that are attached to the Housing. Carefully unplug the wiring harness
that has the RED connector on it from the circuit board. Carefully unplug the
small white connector that has the mylar ribbon cable on it (this cable is
see-through and you can see thin, flat wires in it).
6. 5. Remove (4) screws that are holding the circuit
board onto the Housing.
The Housing should now be free of the circuit board
and wiring harnesses. It's safe to let the wiring harness/circuit board hang
free, but caution should be used anyway.
8. 6. Remove the thin metal frame from the Housing.
There are (4) plastic tabs holding the frame in place. Using a small screw
driver pry one side of the frame away from the housing (try to do this to the
side that has smaller plastic tabs). When this side of the frame is free of the
Housing you have to lift the frame out at an angle to remove. It might put up a
fuss, but be patient and be gentle with it since the frame is thin and fragile.
9. 7. With the frame out of the way you will see the
mylar ribbon cable that is coming out from underneath the Keypad assembly. You
will notice that the mylar ribbon cable folds back onto itself as it re-enters
the Keypad assembly. This 'touching of the two ribbon cables' is where the
trouble lies. The ribbon cables may be stuck together. Carefully separate these
two and then insert a small piece of paper between them (paper can be 1/2 x 1/2
) and work the paper all the way down into the Keypad assembly as far as it
10. 8. Using electrical tape, apply a small piece
between the ribbon cables to hold the paper in place. Next, use more electrical
tape and put it between the mylar ribbon cables enough so as to keep the ribbon
11. 9. Re-attached the thin metal frame making sure to
press it into the Keypad assembly enough so that the (4) tabs click into place.
12. 10. Use electrical tape and apply it to the raw
metal edge of the thin metal frame to prevent the mylar ribbon cables from
rubbing on the metal edge.
13. 11. That's it. A final word of caution. Be careful
when inserting the ribbon cable connector back on to the circuit board. The
connector is loose and you need to gently place the ribbon cable into the
circuit board connector.
14. 12. Reverse the order of assembly from above.
15. 13. Plug in the microwave and then it should reset
and ask you to set the time.
16. Hope this works for you !!
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