After having the same trouble with my DCX200 and not finding a solution online
for the problem, I set out to find a solution of my own. The fix I describe below is probably more of a band-aid than permanent fix but it appears to be working great. The problem, I believe, is caused by the metallic compound that the manufacturer used on the push button contacts in this model of phones and more specifically with the large multi
-function button. This compound appears to wear off quite easily with repeated use of the keypad. Along with this I think that the design of the multi
-function button did not take into consideration the environment in which it would be used. Not everyone washes their hands and face before using a phone (does anyone?) and between grease, make-up and natural oils of the skin building up and eventually making their way down into the components, this may be a contributor to why these buttons are so susceptible to failure.
What you will need:
1) Small Phillips head screw driver.
2) Small flat head screw driver (not shown).
3) Goo-Gone, Isopropyl
Alcohol or some other degreaser/cleaner.
4) Hole punch, preferably smaller than a "standard" hole punch. I found the one I used in my wife's
5) Cotton swabs.
or foil tape. Can be found at any home improvement or hardware store.
. Remove battery and two screws circled in red with your small Phillips head screw driver.
. Pry off the dark grey back of the phone case with your flat head screw driver. I found that starting at the base of the phone and working around the sides was easiest.
. Being mindful the the wires that attach to speaker take the dark grey back off of the phone. Next remove the screw circled in red below:
Removing this screw will allow you to remove the circuit board from the front face of the phone to expose the numeric keypad as shown below. There is a thin white plastic keypad component that will either remain affixed to the keypad or the circuit board when you remove the circuit board from the front face of the phone. Be sure not to damage that.
Take the white plastic sheet and affix it to the circuit board side (if not already on it), with the small black button contact points facing down onto the circuit board as shown below:
Now soak one side of your cotton swab in your Goo-Gone or Alcohol solution and clean both the four small black push button contacts of the large multi
-function button on the back side of the keypad and also the contact points on the circuit board. Then take the dry side of the cotton swab and remove any excess cleaner on the button contacts and the contact points. This step is critical.
This cleans the surfaces and makes the push button contacts on the back side of the keypad ready to receive the foil tape.
Pictured below is the cleaning of the push button contacts of the multi
-function button on the back side of the keypad:
Also clean the contact points on the circuit board using the white plastic sheet as a guide
to where to clean. Don't forget to use the dry side of the swab to remove any excess cleaner:
Now the part that requires of bit of dexterity. Using your hole punch punch out four pieces of the foil tape. If you do not have a hole punch or are using a "standard" sized hole punch, you will want to try and use a scissors
to cut out a small piece of foil tape that will fit over the black push button contacts of the multi
-function key on the back side of the keypad:
Harvest the small circles of foil tape that the hole punch punched out of the foil tape.
You can see a couple of them on my finger below:
Now using your finger nail, gently remove the foil tape backing on these small circles. Yes, this can be a bit tricky
, but I found it to be easier than I expected. With the backing off of the foil tape, affix your small foil circle onto the push button contacts of the multi
-function button on backside of the keypad
as shown below. Do not affix these to the circuit board contacts
Do this for all four contacts of the multi
-function button on the keypad. The picture below shows the finished repair to the push button contacts. I also placed the white plastic film component onto the keypad side to underscore the fact that you place the foil onto the keypad and NOT the circuit board:
Now place the circuit board back onto the front side of the phone (silver side) and fasten down with the screw you took out in step 3 above.
Affix the dark grey back of the phone onto the front side. There is a small plastic tongue
at the top of the dark grey back that fits into a groove on the top of the front silver side of the phone. Get that tongue into place first then the rest of the back will snap into place.
After the back has been snapped back onto the front of the phone, fasten it down with the two screws you took out in step 1 in the battery compartment.
Put the battery back in, wait for the phone to turn on and try the keypad out. Below, you can see that I am checking the caller ID side of the mult
This fix appears to work quite well. I don't know how long the repair will last but it would be easy enough to do again if needed.