TheMightyMadman
Active member
Hi all,
The power supply has unfortunately died in my Macintosh Performa 6400 - it won't start up at all.
It is a 150W unit, Apple part #614-0060, Delta model number DPS-150GB B.
The PWM controller (TOP200YAI) had failed dead-short across all pins. I'm not sure whether this was the cause of the fault, or just a symptom. I did some basic checks on all of the other actives, and they seem OK in-circuit, and the two output rectifiers (STPS3045CP) seem OK out-of-circuit.
I swapped the PWM controller for an uprated part, but the unit is still dead.
Does anyone have schematics for this or a similar unit, please?
Failing that, does anyone have any advice on how best to go about diagnosing it?
Many thanks,
Adam
The power supply has unfortunately died in my Macintosh Performa 6400 - it won't start up at all.
It is a 150W unit, Apple part #614-0060, Delta model number DPS-150GB B.
The PWM controller (TOP200YAI) had failed dead-short across all pins. I'm not sure whether this was the cause of the fault, or just a symptom. I did some basic checks on all of the other actives, and they seem OK in-circuit, and the two output rectifiers (STPS3045CP) seem OK out-of-circuit.
I swapped the PWM controller for an uprated part, but the unit is still dead.
Does anyone have schematics for this or a similar unit, please?
Failing that, does anyone have any advice on how best to go about diagnosing it?
Many thanks,
Adam