I was troubleshooting a balance, and found that the power supply, a wall-wart block converting 230v AC to 9v DC, was dead.
I managed to crack the casing cleanly open, and found that the choke had one of it's 2 legs broken from it's soldering point. The choke doesn't have a base, it's just the donut-ring with the copper wire wound around it, and two wires emerging from the bottom, which go through the circuit board, and soldered directly to it. The wires are quite thin, and the wall-wart looks like it took a knock, hence probably why the wire broke. The choke does have a covering of heat-shrink, and I can just see "25oC VW" on the heat shrink, no other markings. There was no glue holding the choke to the board either.
I haven't tried to solder the choke back on again, the broken wire isn't long enough to go through the board anymore, so I'll need to solder a short bit of wire to extend it, but before I attempt that, thought I'd ask a couple of questions first.
While I have the choke off, is there anyway of taking a measurement off it to determine its "value" or specification? I'm conscious that if I start messing with it, trying to solder a bit of wire to the leg, I might damage it, so if I need a replacement, I'll know what I need.
Also, there are a couple of Fullcon 85oC GR caps on the board; should I replace them while it's open?
I managed to crack the casing cleanly open, and found that the choke had one of it's 2 legs broken from it's soldering point. The choke doesn't have a base, it's just the donut-ring with the copper wire wound around it, and two wires emerging from the bottom, which go through the circuit board, and soldered directly to it. The wires are quite thin, and the wall-wart looks like it took a knock, hence probably why the wire broke. The choke does have a covering of heat-shrink, and I can just see "25oC VW" on the heat shrink, no other markings. There was no glue holding the choke to the board either.
I haven't tried to solder the choke back on again, the broken wire isn't long enough to go through the board anymore, so I'll need to solder a short bit of wire to extend it, but before I attempt that, thought I'd ask a couple of questions first.
While I have the choke off, is there anyway of taking a measurement off it to determine its "value" or specification? I'm conscious that if I start messing with it, trying to solder a bit of wire to the leg, I might damage it, so if I need a replacement, I'll know what I need.
Also, there are a couple of Fullcon 85oC GR caps on the board; should I replace them while it's open?
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