7A26/Repairs

Whiskers

A mechanical part (337-1418-01 ?) near the cam switch is known to develop whiskers.

This part is used one time on each channel. The whiskers can break off and short any circuit in the device.

Tektronix changed that part through time, so not all serial numbers are affected.

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  position

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  microscopic picture

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  microscopic picture

Attenuator modules

The pins of the attenuator modules are connected to conductive traces on the ceramic substrate inside by low-temperature soldering, which can go bad. Re-seating the module can temporarily restore the internal contact but will usually not fix the problem permanently. Repair is possible by opening the click-locked lid and carefully re-soldering (see 307-1012-00).