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Back-lit switches: Difference between revisions
add images of switch repair
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The contacts can break off from the support, giving no or intermittent conduction. It is possible to solder the contact to the support if care is taken to apply solder only to the center, or to transplant an unused contact (see example photo). | The contacts can break off from the support, giving no or intermittent conduction. It is possible to solder the contact to the support if care is taken to apply solder only to the center, or to transplant an unused contact (see example photo). | ||
==Repairing sticky ganged switches== | |||
While Tek documentation states that Series 71 switches are not repairable, this is not strictly true. If the problem is a gang of interlocked switches where it is difficult to change which switch is depressed, this can be resolved without disassembly. | |||
On switches using a metal light guide, a raised rectangle exists on the housing. Cutting through this with an x-acto knife will expose the mechanical interlock. Dispense electrical contact lube into this hole and work the switches. I had best luck alternating lube and alcohol; I believe the latter helped to transport the lube through the switch. See photos in gallery below. | |||
It should be possible to lubricate switches with acrylic light pipe similarly, though they lack the handy raised mark. | |||
==See also== | |||
* [[Media:Repairing tek-made board-mounted push-button switches.pdf|Repairing Tek-Made Board-Mounted Push-Button Switches]] | |||
* [[Pushbutton switches]] | |||
==History== | ==History== | ||
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Tek 7k DPDT PCB switch 1.jpg | Dual DPDT switch interior (mV / mρ mode switch from a [[7S12]]) | Tek 7k DPDT PCB switch 1.jpg | Dual DPDT switch interior (mV / mρ mode switch from a [[7S12]]) | ||
Tek 7k DPDT PCB switch 2.jpg | Tek 7k DPDT PCB switch 2.jpg | ||
7A12 switch.jpg | Sticky switch, before repair | |||
Switch xacto.jpg | Cutting a hole for lubrication | |||
Switch lube.jpg | Injecting lubricant | |||
</gallery> | </gallery> | ||
[[Category:Repair issues]] | [[Category:Repair issues]] | ||
[[Category:Electromechanical components]] | [[Category:Electromechanical components]] | ||