576/Repairs: Difference between revisions
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==Symptom: No Step Generator Steps== | ==Symptom: No Step Generator Steps== | ||
Step generator not producing 10 steps. | Step generator not producing 10 steps. | ||
This occurred after a considerable period of seemingly "Proper" operation. In other words, the unit functioned one day and then the next time it was turned on, the step generator ceased to function correctly. | |||
Various strange behaviors from step generator. | Various strange behaviors from step generator. | ||
Followed schematics and scope patterns and voltages did not correspond. | Followed schematics and scope patterns and voltages did not correspond. | ||
+1 Amp not functional, found Q226 was bad. | +1 Amp not functional, found Q226 was bad. | ||
Found defective Q229 on Step Gen Board. | Found defective Q229 on Step Gen Board. | ||
Replaced and step generator began producing the required steps. | Replaced and step generator began producing the required steps. | ||
==Symptom: No Single Family sweep== | ==Symptom: No Single Family sweep== | ||