Re: Tektronix 475


Roger Evans
 

The two neons should not light in normal operation. They are to protect the CRT from damage in fault conditions.

If you have no horizontal trace but can move the faint line horizontally then the X amplifier is basically working but the time base is not running. I assume the mode and trigger controls are set correctly.

If the time base is not running you will not generate the unblanking pulse necessary to brighten up the beam in normal operation.

Regards,

Roger

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