Hello,
I try to repair a Powerbook 100 AC adapter.
I have change each chemical capacitors even on the daughter board.
All the measurements was done without load.
The problem is that I got only ~ 6.3 V at output with the voltage pot in max position.
The output voltage is not stable and move slowly from down to up at the beginning and then after 20-30 s from up to down.
At one moment the voltage stabilize to more or less 6,3 V, but not exactly the same value at each try.
There is not evidence of overheating or damage on the board and on the components.
I have not found schematics or valuable information (except for recap) on this adapter so I anybody can suggest a way to find and correct the problem ?
I have a second on adapter and this one give 7.7 V at output without load. The powerbook 100 works well with this adapter.
May be can I made some measurements on both but where to start ?
Regards.
Philippe
ps :
I try to repair a Powerbook 100 AC adapter.
I have change each chemical capacitors even on the daughter board.
All the measurements was done without load.
The problem is that I got only ~ 6.3 V at output with the voltage pot in max position.
The output voltage is not stable and move slowly from down to up at the beginning and then after 20-30 s from up to down.
At one moment the voltage stabilize to more or less 6,3 V, but not exactly the same value at each try.
There is not evidence of overheating or damage on the board and on the components.
I have not found schematics or valuable information (except for recap) on this adapter so I anybody can suggest a way to find and correct the problem ?
I have a second on adapter and this one give 7.7 V at output without load. The powerbook 100 works well with this adapter.
May be can I made some measurements on both but where to start ?
Regards.
Philippe
ps :