Cheap n cheerful PSU fix ?
Posted: Sat Aug 26, 2017 8:40 am
I have a good few of the cream coloured wedge power supplies hanging around ..
..all of which are faulty .
BUT ..It is almost always the crappy 5v rail which fails ..
The transformer is usually just fine ..
So
I opened one up ...to reveal the pcb charred and the regulater which is epoxied in ..also failed ..
But having removed the damaged pcb ..a nice vacant pocket is available measuring approximately ..
6cm x 3cm x 3cm ..into which a small switch mode power supply might fit ?
leaving the transformer to supply the 9volt AC ..
Well lookee here ..
I found these on ebay..
http://www.ebay.co.uk/itm/AC-DC-Switchi ... 8cXqDZvyoQ
One in the list ..
this one ..
is about perfect to fit in this space
AC-DC 5V 2A Switching Power Supply Module DC Stabilivolt Power 100-240V
Product Introduction:
1.Input Voltage:100-240V 50-60Hz
2.Output Voltage:5V
3.Output Current:2A
4.Size:6.1*3.6*1.9cm
Function:
1.Overvoltage Protection
2.Overcurrent Protection
3.Short Circuit Protection
and at £2 each delivered ..
..got to be worth a punt..
I've ordered 4 ..
Just got to wait now..
I'll let you know if it does the trick..
rgds
VS
..all of which are faulty .
BUT ..It is almost always the crappy 5v rail which fails ..
The transformer is usually just fine ..
So
I opened one up ...to reveal the pcb charred and the regulater which is epoxied in ..also failed ..
But having removed the damaged pcb ..a nice vacant pocket is available measuring approximately ..
6cm x 3cm x 3cm ..into which a small switch mode power supply might fit ?
leaving the transformer to supply the 9volt AC ..
Well lookee here ..
I found these on ebay..
http://www.ebay.co.uk/itm/AC-DC-Switchi ... 8cXqDZvyoQ
One in the list ..
this one ..
is about perfect to fit in this space
AC-DC 5V 2A Switching Power Supply Module DC Stabilivolt Power 100-240V
Product Introduction:
1.Input Voltage:100-240V 50-60Hz
2.Output Voltage:5V
3.Output Current:2A
4.Size:6.1*3.6*1.9cm
Function:
1.Overvoltage Protection
2.Overcurrent Protection
3.Short Circuit Protection
and at £2 each delivered ..
..got to be worth a punt..
I've ordered 4 ..
Just got to wait now..
I'll let you know if it does the trick..
rgds
VS