Re: PK5501 LCD Some Keys Don't Work

[Frank Kurz <tech@xxxxxxxxxxxxx>]

On 04/10/2012 4:59 PM, Bob La Londe wrote:
> PK5501 LCD Some Keys Don't Work
>
> I had a service call to move a keypad today because the customer is
> removing the wall where it was previously mounted.  After the move keys
> 369# (and the various special function keys) no longer work.  Keys
> 124578*0 still work fine and user codes using those keys (fortunately
> they had some programmed) still arm and disarm.  I didn't drop or abuse
> the keypad in anyway during the move. It seemed like an easy service call.
>
> Any suggestions?
>
> I did already order a replacement keypad.

Chances are some drywall dust (or other non-conductive material got
behind that row of keys.  Take the keypad apart and clean all the
surfaces (back of the buttons and the PCB with some alcohol swabs).


Frank