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| Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems. |
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#1
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Acer Travelmate 220 - internal PSU ticks
Hello,
my Acer Travelmate 220 has a small problem.. or a big one to be precise: The internal power supply unit ( y'know, 19V to 3.3, 5 and 9 V ) ticks and collapses after 5 seconds when trying to power up the notebook. Putting the Accu in in collapses immideatly. Aside from a badly soldered BC37 everything looks ok, and the SMD transistors are okay afais. Help and input welcome -- Sincerely Ruediger |
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#2
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Do an ESR test on all the capacitors in the supply. There is a good chance
you will find a number of them to be too high in their ESR rating. -- Jerry G. ===== "Ruediger" wrote in message ... Hello, my Acer Travelmate 220 has a small problem.. or a big one to be precise: The internal power supply unit ( y'know, 19V to 3.3, 5 and 9 V ) ticks and collapses after 5 seconds when trying to power up the notebook. Putting the Accu in in collapses immideatly. Aside from a badly soldered BC37 everything looks ok, and the SMD transistors are okay afais. Help and input welcome -- Sincerely Ruediger |
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