Question about Uniden DCX200 Digital Phone

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On 2 of the 4 handsets on my Uniden DECT 2080, the large middle button has stopped functioning properly. It's the button with caller ID, phone book, and arrow buttons. One stopped working about 2 months ago the second one "broke" this week. It seems like only a matter of a couple of months before the others go!

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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.

On 2 of the 4 handsets on my Uniden DECT 2080, the - _889.jpg 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 craft supplies.
5) Cotton swabs.
6) Metallic or foil tape. Can be found at any home improvement or hardware store.

Step 1. Remove battery and two screws circled in red with your small Phillips head screw driver.
_891.jpg
Step 2. 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 anOn 2 of the 4 handsets on my Uniden DECT 2080, the - _892.jpgg around the sides was easiest.
_892.jpg
Step 3. Being mindful the the wires that attach to spOn 2 of the 4 handsets on my Uniden DECT 2080, the - _893.jpgke the dark grey back off of the phone. Next remove the screw circled in red below:
_893.jpg
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 rOn 2 of the 4 handsets on my Uniden DECT 2080, the - _894.jpgfixed 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.
_894.jpg 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:
_895.jpg
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 surOn 2 of the 4 handsets on my Uniden DECT 2080, the - _896.jpgd 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 keypOn 2 of the 4 handsets on my Uniden DECT 2080, the - _897.jpg> _896.jpg
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:
_897.jpg
Now the part that requires of bit of dexteOn 2 of the 4 handsets on my Uniden DECT 2080, the - _898.jpgsing 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 scissorsmulti-function key on the back side of the keypad:
_898.jpg
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:
_899On 2 of the 4 handsets on my Uniden DECT 2080, the - _900.jpgass=
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 theOn 2 of the 4 handsets on my Uniden DECT 2080, the - _901.jpgad as shown below. Do not affix these to the circuit board contacts:
_900.jpg
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:
_901.jpg
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 On 2 of the 4 handsets on my Uniden DECT 2080, the - _902.jpgngue
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-function button:
_902.jpg
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.

Posted on Mar 06, 2011

  • tjrtech Mar 12, 2011

    Thanks for posting this. Our DCX-200 had exactly the same problem, and the fix posted solved it. Took only a few minutes. You do need small screwdrivers, both the philips for screw removal, and the flat for prying the case. Also, for me and our hole punch, the foil tape discs were a bit big, so I had to trim by hand with scissors so that the foil fit over the black nubs, but also moved freely in the countersink of the soft plastic holding all the buttons in place.

    Now to figure out why the volume on the other handset is pretty much DOA. Have to have the phone on hands-free speaker to hear it.

  • virtua1 Mar 17, 2011

    Thanks so much csiguy. Excellent tutorial. You've saved me time, money, etc. This worked like a charm. Two things: my hole punch must be old, or the foil tape I bought was thicker tape - I had to cut the round circles entirely with scissors. Also, the adhesive on my tape was not sticky enough to hold onto the push button contacts by itself. To remedy this, I used some generic elmer's white school glue, letting a bead gather at the top of the bottle. With the tape backing off of the foil, I used tweezers to hold the foil circle and run the sticky side of the foil over and through the white glue. Still gripping the foil with the tweezers, I placed the foil onto the push button contacts. I was careful to make sure no glue got on the clean, contact side. It did not take long to dry, and now the volume on my handset works again!

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