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Old 23rd Dec 2015, 5:32 pm   #6
high_vacuum_house
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Join Date: May 2003
Location: Belper Derbyshire
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Default Re: Tektronix 545 Oscilloscope fault

Which Tektronix 545 model is it (545A or 545B) as they are quite different internally. The power supply is the first area to go through first. Unlike more basic oscilloscopes the 545 series oscilloscopes have quite a complex power supply using lots of valves and neon voltage stabilisers. Once you have the circuit diagram for the power supply, fault finding is not as daunting as it would first seem as it is easily broken down into several sections. Once the power supply is correct most of the CRT adjustment controls (focus, Astig, brightness ECT.) should work as intended.
The time bases can then be worked on with confidence that the CRT display is correct. You are lucky as it sounds like much of the oscilloscope is working in a fashion (EHT unit, CRT circuitry, power supplies for the CRT ECT.)
Christopher Capener
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Last edited by high_vacuum_house; 23rd Dec 2015 at 5:41 pm.
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