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576/Repairs: Difference between revisions
→Some Defects without symptoms. NOTE: Just because I did not see "symptoms" does not mean that they were not there, just that I was not experienced enough to find any such symptoms.
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Lost +12.5 and therefore +225 as well. Also affected were 5V and 4.5V which were both about half the required voltage. | Lost +12.5 and therefore +225 as well. Also affected were 5V and 4.5V which were both about half the required voltage. | ||
==Some Defects without symptoms. NOTE: Just because I did not see "symptoms" does not mean that they were not there, | ==Some Defects without symptoms. NOTE: Just because I did not see "symptoms" does not mean that they were not there, simply that I was not experienced enough to find any such symptoms.== | ||
Found D507-D708 9V Zener VR TC shorted (continuity both directions) on both Step Gen and Display Board. | Found D507-D708 9V Zener VR TC shorted (continuity both directions) on both Step Gen and Display Board. | ||
Tek's recommended replacement is a [[1N936]], available at [https://www.mouser.com Mouser Electronics]. | Tek's recommended replacement is a [[1N936]], available at [https://www.mouser.com Mouser Electronics]. | ||