475: Difference between revisions
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* [http://www.amplifier.cd/Test_Equipment/Tektronix/Tektronix_other/475.htm Tek 475] / [http://www.amplifier.cd/Test_Equipment/Tektronix/Tektronix_other/475A_DM44.htm Tek 475A] @ amplifier.cd | * [http://www.amplifier.cd/Test_Equipment/Tektronix/Tektronix_other/475.htm Tek 475] / [http://www.amplifier.cd/Test_Equipment/Tektronix/Tektronix_other/475A_DM44.htm Tek 475A] @ amplifier.cd | ||
* [https://www.youtube.com/watch?v=2SESaF7Ibbw Tek 475A in operation] @ YouTube | * [https://www.youtube.com/watch?v=2SESaF7Ibbw Tek 475A in operation] @ YouTube | ||
====Common Problems==== | |||
The 400 series scopes use tantalum capacitors. They are known to short out and bring the scope down. | |||
Typical symptoms will be no trace, or powering on and going off in few seconds due to built in foldback protection. | |||
The shorted capacitor in the power rails will down one (or more) of them and causing entire scope to be non functional. | |||
Quick way to troubleshoot is, after powering off and ensuring all capacitors are discharged, check resistance to ground on each power supply rail and identify the shorted power rail. Then trace the offending tantalum capacitor with the help of schematic. | |||
==Pictures== | ==Pictures== | ||
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Tek 475a trace dm44.jpg|475A with [[DM44]] | Tek 475a trace dm44.jpg|475A with [[DM44]] | ||
Tek 475 dual sine.jpg|475 | Tek 475 dual sine.jpg|475 | ||
Tek_475A_Time-Freq.jpg | | Tek_475A_Time-Freq.jpg | 475A Time/Frequency Measurement with [[DM44]], HP Frequency Counter used for Verifying [[DM44]] Output. | ||
Tek 475a rear.jpg|475A rear | Tek 475a rear.jpg|475A rear | ||
475A_A9-Interface_board.jpg | 475A A9 Interface Board | 475A_A9-Interface_board.jpg | 475A A9 Interface Board | ||