Well, after the electricity went out for an hour yesterday after a storm, my D-Link DI-614+ router would not come on (no power at all). I'm not exactly surprised though, since it had the same problems in the past too - if you unplug it and plug it in, it would take a while before any power came on and sometimes it would need to be plugged and unplugged at least a few times before it came on. The router itself has Stone caps and a lone Teapo SEK. I know the Stone caps aren't exactly good, but at least the router should power on and it doesn't.
Since this seemed more like a power adaptor issue to me, today I decided to check the power brick with my DMM. When I plugged it in, there was very little voltage coming out (around 0.5v). Plugging and unplugging it a couple of times would bring the voltage up, but nowhere near the specs on the label (see below). I even tried putting a 90mm 0.23amp fan for a minimum load while measuring the voltages. Still nothing but very low voltage.
Judging by the size, this is a switch-mode power brick. Here's the info that's on it:
Shang Ming Electronic Co., LTD.
Model: SMP-T1178
Input: 100-120v, 0.5A, 50-60Hz
Output: 5.0v, 2.5A, 20-30VA
UL E220699 <--- it doesn't lead to anywhere when I Googled it.
Because this is a SMPS brick, I decided to do one more test on it - I left it under the sun to cook a little. 30 minutes later when I plugged it in, suddenly there's power! I tried powering the fan above and the router and they both powered up fine. Voltage was 5.20v with the fan. After I left the power brick to cool down, it won't produce any power again...
So what do you all think, a faulty output capacitor maybe? According to my tests, that's what it should be since the power brick came on when it was warm, but not when it was cold.
More importantly, any idea on how to open it - without using a hammer or a saw, that is. There's no screws anywhere, not even under the label. I'm guessing it's probably latches on the inside, but the thing is shut very tight. Any chance to open it at all?
Since this seemed more like a power adaptor issue to me, today I decided to check the power brick with my DMM. When I plugged it in, there was very little voltage coming out (around 0.5v). Plugging and unplugging it a couple of times would bring the voltage up, but nowhere near the specs on the label (see below). I even tried putting a 90mm 0.23amp fan for a minimum load while measuring the voltages. Still nothing but very low voltage.
Judging by the size, this is a switch-mode power brick. Here's the info that's on it:
Shang Ming Electronic Co., LTD.
Model: SMP-T1178
Input: 100-120v, 0.5A, 50-60Hz
Output: 5.0v, 2.5A, 20-30VA
UL E220699 <--- it doesn't lead to anywhere when I Googled it.
Because this is a SMPS brick, I decided to do one more test on it - I left it under the sun to cook a little. 30 minutes later when I plugged it in, suddenly there's power! I tried powering the fan above and the router and they both powered up fine. Voltage was 5.20v with the fan. After I left the power brick to cool down, it won't produce any power again...
So what do you all think, a faulty output capacitor maybe? According to my tests, that's what it should be since the power brick came on when it was warm, but not when it was cold.
More importantly, any idea on how to open it - without using a hammer or a saw, that is. There's no screws anywhere, not even under the label. I'm guessing it's probably latches on the inside, but the thing is shut very tight. Any chance to open it at all?
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