Panic Buttons - High Res Faults

[Deltaseven]

Hi Folks,

We seem to be having a large number of problems with high res faults on our PAs, across multiple sites, and for quite a while. Our standard fit is the Knight Plastics KP10 or KP10s (Grade 3 with jumper selectable resistance). They PCBs seem to be poorly soldered with large blobs of solder, and large amounts of flux around the solder points. If you meter the tamper terminals, with the spring pressed, resistance fluctuates between 30 and 550 ohms, so clearly that is where the problem lies.

Anyone else having similar problems? If not, what PAs are you using (grade 3).

Thanks,

D7

[james.wilson]

elmdene or cqr pa's here

[antinode]

Our standard fit is the Knight Plastics

There is your problem.

We use CQR, 0 problems.

[ranger]

CQR here and no probs

[Russ99]

CQR all the way. We have fitted about 150 plus recently on some large retail roll-outs and they have all been fine.

[Deltaseven]

Thanks all for your comments - will try to push for a change.

[9651]

Elmdene here

[spider]

"poorly soldered with large blobs of solder, and large amounts of flux around the solder points" it might be that they have gone over to lead free solder and not increased the iron temperature )

[lawandorder]

"poorly soldered with large blobs of solder, and large amounts of flux around the solder points" it might be that they have gone over to lead free solder and not increased the iron temperature )

I was wondering the same thing, I hate lead free, it just doesn't run the same.

Give me full fat any day.

[diverbloke]

High resistance is probably thru links for resistor select.

Have found using normal resistors or soldering links stops problem