Hi guys,
I have this power supply from some microsoft iptv box, pulled it some time ago, cant remember exact model.
The details from the board:
401803 Rev: 04.1
MODEL: 8B-40501B0
Date 2007.06.25
AC in: 100V-240V~~
Output:
+5V 4.2A
+12V 1A
-30Vsb 0,04A
Made by ENG Electric Co Ltd.
As you can see in attached pictures have desoldered connectors as they were soldered-in type, not disconnectable. the cables were cut off original connectors so i added my own output cables directly to the board.
Output cables were +12 +5 GND, a few of each. There was a slot for -12V line but the components were not soldered in, neither was the cable. I think i can make the -12V line by adding missing components. Over that there was also one -30V SB output, and two strange ones: FL1, FL2. Not sure what they are for. I would also see a marking of "3.85V (FL1, FL2)" just under Y-CAP which has nothing to do with strange FL1 FL2 circuitry. I guess it is just a coincidence and a continuation of output details as text is just a little bit under other output details I have stated above.
Question 1: What the hell is FL1, FL2? They are directly connected to each terminal of the little transformer on the outside part of the board.
Question 2: why there is -30VSB output if it works in the same way as +5 and +12 do, i.e. when the mains cable is plugged and the switch is on? I mean, it is not more "standby-ish" than other outputs, is it?
Posted this just for sake of interest. Power supply looks neat and well built for me, and it is full of teapo caps, non of them are leaky though. It does the job of supplying my 3,5" hard drive with +12V input. I did not have anything to test the output ripple with.
I have this power supply from some microsoft iptv box, pulled it some time ago, cant remember exact model.
The details from the board:
401803 Rev: 04.1
MODEL: 8B-40501B0
Date 2007.06.25
AC in: 100V-240V~~
Output:
+5V 4.2A
+12V 1A
-30Vsb 0,04A
Made by ENG Electric Co Ltd.
As you can see in attached pictures have desoldered connectors as they were soldered-in type, not disconnectable. the cables were cut off original connectors so i added my own output cables directly to the board.
Output cables were +12 +5 GND, a few of each. There was a slot for -12V line but the components were not soldered in, neither was the cable. I think i can make the -12V line by adding missing components. Over that there was also one -30V SB output, and two strange ones: FL1, FL2. Not sure what they are for. I would also see a marking of "3.85V (FL1, FL2)" just under Y-CAP which has nothing to do with strange FL1 FL2 circuitry. I guess it is just a coincidence and a continuation of output details as text is just a little bit under other output details I have stated above.
Question 1: What the hell is FL1, FL2? They are directly connected to each terminal of the little transformer on the outside part of the board.
Question 2: why there is -30VSB output if it works in the same way as +5 and +12 do, i.e. when the mains cable is plugged and the switch is on? I mean, it is not more "standby-ish" than other outputs, is it?
Posted this just for sake of interest. Power supply looks neat and well built for me, and it is full of teapo caps, non of them are leaky though. It does the job of supplying my 3,5" hard drive with +12V input. I did not have anything to test the output ripple with.
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