D-Link DIR615

[budm]

Re: D-Link DIR615

I see one component (flat rectangular, Yellow/Brounish color) labeled as F1 (It looks like Resetable fuse) close to the DC inlet, try removing that and see if the shorts go away.

[Amraks]

Re: D-Link DIR615

That never worked besides that fuse has a crystal in it and when it gets hot it will open the circuit but when cooled down it will close the circuit again. Am I right?

[budm]

Re: D-Link DIR615

That why it is called resetable fuse (or Poly switch), I use in the products I designed at work here, but the shorts may be on the INPUT side of the fuse, since there are other components on the input side of fuse. We need to isolate the shorts unless you want to start cutting traces!

[Amraks]

Re: D-Link DIR615

What is the black thing on the right of the poly switch?

[budm]

Re: D-Link DIR615

Small black rectangular with designator as D25, taht can be the reverse polarity protection Diode incase some did not oBserve the polarity of the AC adapter. You can verify tah by looking to see if the end with the white band is connected to the fuse, and another end is connected to the ground plain of the board. I cannot really tell formthe picture.

[Amraks]

Re: D-Link DIR615

It says E2 on the top of it.

there is no white band but a bevel at the end. seems to be going to the fuse.

Why do I here a faint clicking noise when I plug it in, seems like there is a click noise coming from the switch regulator.

[Amraks]

Re: D-Link DIR615

is that LED10 is meant to be showing resistance? its not showing anything.

shows it on one side but the other its just stays 0.

[Amraks]

Re: D-Link DIR615

woops sorry was wrong it was 5.

[budm]

Re: D-Link DIR615

You are hearing faint clicking noise because the power supply senses over current draw then it goes into shutdown, then it will restart again, it is just stuck in the loop, it will go away when the shorted circuit is removed.

[ben7]

Re: D-Link DIR615

Start out by temporarily removing the poly-fuse, and see if the short circuit goes away. If it did, then the short is farther downline from the fuse, and if it didn't make the short go away, then something between the power jack and the fuse is shorted out.

-Ben

[budm]

Re: D-Link DIR615

That is what I asked him to do on post #21. see the reply on #22.
"That never worked besides that fuse has a crystal in it and when it gets hot it will open the circuit but when cooled down it will close the circuit again. Am I right?"
Took him a long time just to take the reading on the DC input jack resistance to see if it shows shorted circuits for me on post #3, and sure enough, it is dead short!
I gave up giving any more advice on this thread. Bye.

[rogfanther]

Re: D-Link DIR615

From the pictures I cannot see the code, but yes, it should be 105 and 112 as circled in post #16. Many times, when used with wrong power supplies, the DIR-615 burns these two ICs. Normally, it put holes in them ( for example, when connecting 12V instead of the 5V ) . But they could fail and not show marks. If you have access to the necessary tools, you can try removing them and see if the short stops.

[Amraks]

Re: D-Link DIR615

What I'm trying to figure out is am I meant to replace the poly fuse with wire or just leave it out?
I took out the poly fuse also and tested the circuit with out the poly fuse was not sure what you meant.
I have a hot air gun to take that chip off would that work with a flux pen?

If they are the course where can you get these IC's

also realize there is a time difference here it was late in the morning so I went to bed.

Also I work on this stuff in my spare time, I'm sorry I took so long to find the readings.

[Amraks]

Re: D-Link DIR615

Also that diode we was talking about can they go bad?

I read if they read different values both way they are bad.

thats the smd rectifier next to the poly-fuse I am talking about.

Would I be able to do a resistance test on it?

[rogfanther]

Re: D-Link DIR615

I think they wanted you to test without the fuse to see if the short was after or before the fuse. From experience with a bunch of 615´s that we got to fix, using wrong adapter kills the two regulator ICs.

You can let the power supply conected, wait a few minutes and see if they are hot.
You can remove them with the air gun, but you should practice in some scrap board first. Note that they are tiny components, and there are other tiny smd resistors and caps around them , that can be easly blown out . I seem to remember they have a GND pad in the underside, so a good amount of heat may be necessary to remove them. Use whatever tool you are confortable working with.

To reliably test the diode, you would need to take it out of the circuito, but if it doesn´t give short both ways, or open both ways, it should be good.

The chips are not that easy to get, but it is doable. But the cost of components + shipping can be greater then the equipment´s value.

[Amraks]

Re: D-Link DIR615

Yeah i removed that poly fuse and got 0.00.

Is it posible to test voltage after them ic's?

[rogfanther]

Re: D-Link DIR615

Yeah i removed that poly fuse and got 0.00.

Is it posible to test voltage after them ic's?

But got 0.00 where, in the polyfuse or in the power connector pins ?

Just to be sure we are seeing it the same way, when you touch the meter probes one to the other, do you get 0.00, right ?

If the regulators are shorted, no easy way to test voltages, because the shorts between VCCx and GND will interfere. Have you done the basic test of seeing if they are heating ?

[Amraks]

Re: D-Link DIR615

on the power connector pins the ones that are soldered into the board.

yes you do get 0.00 when u touch probes together.

Yeah they aren't heating left it on all day today and no heat.

[rogfanther]

Re: D-Link DIR615

The power connector has 3 pins like this :

______----------_______

        01

     02

        03

You should be measuring continuity between 03 and 02. Without the power plug connected, most times 01 and 02 are connected inside the connector.

Even if they do not heat, those two regulators can still be shorted. Have you tested those diodes near them ? You can trace the circuit from the power
plug onwards, and after some components, remove something to isolate if the power is after or before that point.

I would bet my .05c in the regulators, but the only way to be sure would be to remove them, and if you are not used to it, that can be a hard task, or even damage more the board.

[Amraks]

Re: D-Link DIR615

yeah I have been testing with 03 and 02.

i think you have stepped onto something there about 4 of them diodes read 0.01 some 5.84
some others 0.00

the diodes near first chip the first one reads 0.00