31,932
edits
576/Repairs: Difference between revisions
→Symptom: Complete Unit shut down
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==Symptom: Complete Unit shut down== | ==Symptom: Complete Unit shut down== | ||
Power Indicator on, otherwise no indication that the unit is powered on at all. | Power Indicator on, otherwise no indication that the unit is powered on at all. | ||
No 225V, Low 4.5V, Low 5V, Low +12.5V, -75V Normal, 15V Normal, 100V Normal and -12.5 Normal | No 225V, Low 4.5V, Low 5V, Low +12.5V, -75V Normal, 15V Normal, 100V Normal and -12.5 Normal. | ||
Replaced Q800 in +12.5V Power Supply – 2N3904 | Replaced Q800 in +12.5V Power Supply – [[2N3904]] failed and shut down entire machine. | ||
Lost +12.5 and therefore 225 as well as 5V and 4.5V were low or lost as well. | Lost +12.5 and therefore +225 as well as 5V and 4.5V were low or lost as well. | ||
==Defects found without any noted symptoms== | ==Defects found without any noted symptoms== | ||