Hi all.
Will appreciate assistance from members of the forum.
I have a 9-channel DVR by AVtech. Recently its power supply failed to function. I searched around for a replacement unit but ....
So I decided to custom make a power supply for the DVR.
The power supply I am making consist of 2 separate units, one supplying 12v and the other 5v.
Sounded simple, eh? But the output plug is a 8-pin plug and I need to figure out which pins are 12v and which are 5v.
Fortunately, the output supply comes with a diagram of the pins' output, showing the +12v and +5v pins. However, the -12v and -5v pins are indicated as GND only.
I need to know which of the GND pins are the -12v and which are -5v as the GND is not the common GND of a single supply. The pins concerned are pins 1, 2, 3 and 5 from the attached photo.
Will it make any difference if the -12v and the -5v are swapped?
A photo of the old power supply is attached.
The DVR is a 9-channel (JPEG format) non-network unit from AVtech.
Thanks for the assistance.
