Re: PK5501 LCD Some Keys Don't Work

[tourman <robercampbell@xxxxxxxxx>]

On Wednesday, October 10, 2012 12:36:42 PM UTC-4, Bob La Londe wrote:
> On Oct 10, 9:33=A0am, Jim <alarmi...@xxxxxxx> wrote:
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> > On Tuesday, October 9, 2012 2:00:20 AM UTC-4, Frank Kurz wrote:
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> > > On 07/10/2012 8:25 PM, Jim wrote: > On Friday, October 5, 2012 8:44:2=
8 PM UTC-4, Bob La Londe wrote: >> "Jim" <alarmi...@xxxxxxx> wrote in messa=
genews:ef5b0e3a-9a06-42a5-b0bd-de8ac9c067fa@xxxxxxxxxxxxxxxxxxx > On Thursd=
ay, October 4, 2012 7:59:48 PM UTC-4, Bob La Londe wrote: >> PK5501 LCD Som=
e Keys Don't Work I had a service call to move a keypad >> today because th=
e customer is removing the wall where it was previously >> mounted. After t=
he move keys 369# (and the various special function keys) >> no longer work=
. Keys 124578*0 still work fine and user codes using those >> keys (fortuna=
tely they had some programmed) still arm and disarm. I >> didn't drop or ab=
use the keypad in anyway during the move. It seemed like >> an easy service=
 call. Any suggestions? I did already order a replacement >> keypad. > > Ha=
d they already begun construction? Maybe dust inside? Did you > disassemble=
 and look at the lands on the PC board? Is there a ribbon > connector that =
may have come loose? I don't know the configuration/layout > of the keypad =
but it looks possible that 3,6,9 and # are all in a v erticle > row. That w=
ould indicate (to me, anyway) either a loose/bad connection > either on the=
 PC board or wires in the keypad or something to do with the > processors m=
atrix. If you have an eye loup or good magnifier, look at the > solder conn=
ections on the PC board. In removing the Keypad, you may have > flexed the =
PC Board and broken a component or lead solder connection. It > depends on =
how crazy you want to get with it but, you could touch each of > the solder=
 connections with a (not too hot ) iron. > Nah! Only I'm that crazy. I did =
take it apart and give it the eyeball, but I didn't go get my reading glass=
es out of the truck. Never carried a loupe in the truck, but I do have a co=
uple in the shop. Maybe its time to start. > > At times I think I could use=
 a pair of glasses with two 20X eye loupes glued onto the lens of the glass=
es. > > I think it must be the air polution that prevents me from seeing as=
 good as I used to. >
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> >
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> > Naw. It's the sea air. Too much salt in your eyes. :-)
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> >
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> > I didn't think of that excuse.
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> >
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> > How kind of you.
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> Swapped the keypad, works perfectly including some codes that didn't
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> work before...  interesting.

RHC: Occasionally I find DSC panels and keypads can do VERY strange things.=
 Today I  was working with a 5501 keypad on a DSC panel and suddenly all th=
e zones didn't work any more, while they were working just fine before I me=
ssed with the keypad. Well to make a long story short, "somehow" messing wi=
th the panel turned "off" all the zones 1 through 8 in Section 202, disabli=
ng all zones. There is absolutely NO logical way this should have happened =
but it did since I up until that point hadn't entered installer programming=
 mode... WTF!=20

And of course there is the other rule to remember with DSC panels..if somet=
hing isn't happening the way it should, or there's a trouble that just wont=
 go away, power the panel down and back up. Chances are it may solve that i=
nexplicable problem...WTF