The Tektronix 465 analogue oscilliscope was built in the 1970s and was used to test electrical equipment. The 465 was considered one of the top oscilliscopes of the time. The 465 has common problems that can easily be repaired.
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Faulty tantalum caps are one of the most common reasons a Tektronics 465 display will not trace. The lights may turn on in the machine. To check the tantalum caps, the base must be removed and test each tantalum cap with an ohm meter.
Traces Only Half the Screen
When the oscilliscope traces only half the screen, the most common issue is that the deflection plate wire has become disconnected from the neck of the cathode ray tubes (CRT). Reconnecting the deflection plate wire will cure this issue most of the time.
Sweep faults can be one of the most difficult issues to identify. Start by checking all power supplies on the oscilliscope. Next check the axial electrolytic cap to see if it has shorted out the 22R feed resistor. Change the mode to XY and see if you can move the spot across the CRT. If not the Horz output circuit needs replaced. Check the timebase switch contacts to see if they are dirty or need replaced.
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