I have a dell 172fpt.Initaly there was no sign of life.D815 a transient voltage suppressor was in a real bad way, It has been replaced
.I have 165v across the big cap c823.I also am reading 23v on the 35v 470uf caps in the c831 area.
I am calling the 5v rail 0v although sometimes I will see about a voltage of 3.5 v to 4v that is very unsteady. Most of the time its 0v
.On the back of the power supply there is a 14 pin ic #i801 Three numbers are on it #1 Lta201p---#2 4e843343 #3—h603421.
I have been probing around checking voltages. And one thing I have noticed on pin #4 of L817 optocoupler I see 12v most of the time but sometimes the voltage goes down to 5v and at this time the voltage somewhat comes back to the 5v rail but it is low and unsteady.
Direction on this would be welcomed.
Thanks Al.
.I have 165v across the big cap c823.I also am reading 23v on the 35v 470uf caps in the c831 area.
I am calling the 5v rail 0v although sometimes I will see about a voltage of 3.5 v to 4v that is very unsteady. Most of the time its 0v
.On the back of the power supply there is a 14 pin ic #i801 Three numbers are on it #1 Lta201p---#2 4e843343 #3—h603421.
I have been probing around checking voltages. And one thing I have noticed on pin #4 of L817 optocoupler I see 12v most of the time but sometimes the voltage goes down to 5v and at this time the voltage somewhat comes back to the 5v rail but it is low and unsteady.
Direction on this would be welcomed.
Thanks Al.
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