260-1971-00/Repairs

Repair of push switches

Tektronix push switches like 260-1971-00 can fail when the end of the green push bar breaks, releasing the contact springs of the last 2 poles.

In that case the repair can be done even when mounted to PCBs, see repair section of DM501A.

Disassembling The Push Button

Remove spring retaining ring and spring.
Push and hold the locking bar with a small screw driver or toothpick and push in the green contact bar slowly and carefully to be able to take away the contact springs. Otherwise the contacts might jump out of the holders.

Assembling The Push Button

Slide in the green contact bar with the rear holder pin in the right position until the the first two spring contact pockets reach the end of the push button housing.
Place spring contacts on both sides in the pocket with round edges facing away from the green contact bar.
Hold the spring contact and push in the green contact bar further util the next contact pockets are in place.
When the green contact bar gets stuck while pushing in, push and hold the locking bar with a toothpick.
When all contact springs are in place and the green contact bar is fully pushed inside the button housing, place spring and spring retaining ring on the green contact bar.

See Also

• Pushbutton switches

Pictures

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  Dissasembling - locking bar marked with red arrows

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  Removed left contact bar and visible locking bar

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  Contact bar with spring contacts in the contact pockets

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  Defect contact bar on top and original contact bar below

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  Example on how to replace the contact bar in a DM501A