TP-Link TL-SF1005 Switch Problem

[murat0606]

Hi guys, I have a two switches.(TL-SF1005) but we have a problem. the led lights up constantly sometimes flashing. I gave heat to the main chip but this is not working. what can I do? thanks.

[stj]

Re: TP-Link TL-SF1005 Switch Problem

replace the electrolytic caps with something good like panasonic FR series.
the smaller one looks domed and caps dont last in this type of gear.

[murat0606]

Re: TP-Link TL-SF1005 Switch Problem

replace the electrolytic caps with something good like panasonic FR series.
the smaller one looks domed and caps dont last in this type of gear.

Hi, which component? Capacitor?

[stj]

Re: TP-Link TL-SF1005 Switch Problem

yes, c2 and c6

[televizora]

Re: TP-Link TL-SF1005 Switch Problem

After a storm or overvoltage? I am not sure that replacing the caps will fix the problem.

[eccerr0r]

Re: TP-Link TL-SF1005 Switch Problem

Good luck... I've had to delegate most of my failed network switches to the round file, usually not capacitor failure but rather switch chip failure :-(

Have two flaky 8-port Gbit switches (Dell(managed), D-Link), a third 8-port Gbit switch that failed (SMC), a 5-port Gbit switch that has two bad ports (hawking), and a failed 8-port 10/100 (noname...). All I can do is just find cheap ones and keep swapping them out, still using the flaky ones as much as I can as they still work if not disturbed, and I have another D-link (managed) and netgear in the spare bin picked up from a second hand shop.

(I sure hope I don't have to fall back to a 24-port 10/100 switch...uugghh)

For me, it almost seems to me network switches die as quickly as GPUs for some reason or another, and it's always the switch chip/GPU versus PSU issues.

[stj]

Re: TP-Link TL-SF1005 Switch Problem

probably heat,
they used to be in fan cooled cases with heatsinks on the chips - now they are often just closed ovens

[televizora]

Re: TP-Link TL-SF1005 Switch Problem

Good luck... I've had to delegate most of my failed network switches to the round file, usually not capacitor failure but rather switch chip failure :-(

I found a solution for TPLink routers, where the led of the port is glowing, but dimmed and you don't have a ping to it or where the switch restarts. For the routers, ground the output to this port before the transformers. The IC will disable this port as shorted and the rest of the router will work. The ping will return to normal. For the bad ports, if they lead to restart of the switch or heating, disable these chips. If not - use until dies. If it's only one chip, you have to replace it, so better buy new one. It is a chip failure, but sometimes grounding/shorting the outputs of the chip connected to the port that is causing problems returns is to working condition, although with 1 port less.
I saved numerous WR740 by shorting the problematic port. And after this they continue to work. Behaviour is this.
1. Start the router.
2. One of the LAN leds glows constantly.
3. Ping disappears shortly after starting or no ping at all.
4. Ground the outputs of the IC to the damaged port. Just one big blob of solder connecting every pin of the RJ45 socket of the damaged port.
5. Ping returns, router works for months/years.
Stupid and simple fix. I really don't have spare transformers, IC-s and so on. And this costs almost nothing.
Usually the IC just turns off the shorted port.

[murat0606]

Re: TP-Link TL-SF1005 Switch Problem

I found a solution for TPLink routers, where the led of the port is glowing, but dimmed and you don't have a ping to it or where the switch restarts. For the routers, ground the output to this port before the transformers. The IC will disable this port as shorted and the rest of the router will work. The ping will return to normal. For the bad ports, if they lead to restart of the switch or heating, disable these chips. If not - use until dies. If it's only one chip, you have to replace it, so better buy new one. It is a chip failure, but sometimes grounding/shorting the outputs of the chip connected to the port that is causing problems returns is to working condition, although with 1 port less.
I saved numerous WR740 by shorting the problematic port. And after this they continue to work. Behaviour is this.
1. Start the router.
2. One of the LAN leds glows constantly.
3. Ping disappears shortly after starting or no ping at all.
4. Ground the outputs of the IC to the damaged port. Just one big blob of solder connecting every pin of the RJ45 socket of the damaged port.
5. Ping returns, router works for months/years.
Stupid and simple fix. I really don't have spare transformers, IC-s and so on. And this costs almost nothing.
Usually the IC just turns off the shorted port.

Can you show it practically? (images tutorial)

[murat0606]

Re: TP-Link TL-SF1005 Switch Problem

probably heat,
they used to be in fan cooled cases with heatsinks on the chips - now they are often just closed ovens

Yes I think this is low price product.

[murat0606]

Re: TP-Link TL-SF1005 Switch Problem

After a storm or overvoltage? I am not sure that replacing the caps will fix the problem.

I dont know.

yes, c2 and c6

Ok, I will try, thanks.

[televizora]

Re: TP-Link TL-SF1005 Switch Problem

Can you show it practically? (images tutorial)

I don't have photos of this fix, because I don't consider it true fix.
It's workaround to use already dying device with no guarantees.
I had some successes, but this is not a true fix. The problem is that these chips are custom, you cant replace them with general purpose chips. You either have to find and order exactly this chip or scrap the device. Replace the caps in your switch. Also, check the voltages after the buck-down converter. These switches usually have 5-9-12V PSU. The IC requires 3.3 or lower voltages. And this device is so cheap, that is not deserving this kind of attention.

[murat0606]

Re: TP-Link TL-SF1005 Switch Problem

I don't have photos of this fix, because I don't consider it true fix.
It's workaround to use already dying device with no guarantees.
I had some successes, but this is not a true fix. The problem is that these chips are custom, you cant replace them with general purpose chips. You either have to find and order exactly this chip or scrap the device. Replace the caps in your switch. Also, check the voltages after the buck-down converter. These switches usually have 5-9-12V PSU. The IC requires 3.3 or lower voltages. And this device is so cheap, that is not deserving this kind of attention.

Thanks for interesting. You're right. Agree with you is not worth it.