Samsung UE40C6000RWXXN clicking power board issue

[dick_barton]

Re: Samsung UE40C6000RWXXN clicking power board issue

Fuses are for protection. Bridging it removes the protection and you could easily end up with parts blowing up giving you an even bigger problem than you have already.
Best replace it with likewise fuse.

If FM801S is blown then you need to recheck the mosfets Q803 & Q803 with your set powered off and using your meter set to diode mode --!>--
to see if they have are short circuit. It would also be wise to check all the diodes around that part of the circuit. DM810, DM811, DM812,

[sepper]

Re: Samsung UE40C6000RWXXN clicking power board issue

Fuses are for protection. Bridging it removes the protection and you could easily end up with parts blowing up giving you an even bigger problem than you have already.
Best replace it with likewise fuse.

Ok, I have to order one Hopefully it's here tomorrow but It's late so I guess it will be here on friday.

Sorry for letting you guys search so deep in the diagram because of a stupid fuse mistake. I thought it was acting as a diode. Learned a lot already. I hope the issue will be fixed by the replacing the fuse. Keep you guys posted. And thanks a 1000x times!

[budm]

Re: Samsung UE40C6000RWXXN clicking power board issue

You need to check MOSFETs QM802, and QM803 for shorted circuit between Source pin and the Drain pin.

[sepper]

Re: Samsung UE40C6000RWXXN clicking power board issue

You need to check MOSFETs QM802, and QM803 for shorted circuit between Source pin and the Drain pin.

They are all shorted

[dick_barton]

Re: Samsung UE40C6000RWXXN clicking power board issue

Fuses are for protection. Bridging it removes the protection and you could easily end up with parts blowing up giving you an even bigger problem than you have already.
Best replace it with likewise fuse.

If FM801S is blown then you need to recheck the mosfets Q803 & Q803 with your set powered off and using your meter set to diode mode --!>!--
to see if they have are short circuit.
It would also be wise to check all the diodes around that part of the circuit. DM810, DM811, DM812, dual diodes DM804, DM806 as well as checking the resistors.

[budm]

Re: Samsung UE40C6000RWXXN clicking power board issue

All the resistance reading combination of all 3 pins show <1 Ohms?

[sepper]

Re: Samsung UE40C6000RWXXN clicking power board issue

All the resistance reading combination of all 3 pins show <1 Ohms?

Around 1-2 ohms on circuit

[budm]

Re: Samsung UE40C6000RWXXN clicking power board issue

Well, remove them and test them off the board next.

[sepper]

Re: Samsung UE40C6000RWXXN clicking power board issue

Well, remove hem and test them off the board next.

1.5 ohm from gate to drain and 2.2 ohm from source to drain for QM803
0.9 ohm from gate to drain and 2.2 ohm from source to drain for QM802

[sepper]

Re: Samsung UE40C6000RWXXN clicking power board issue

Well, remove them and test them off the board next.

I have new fuses. They are bigger then the original because otherwise I had to wait too long. But the value is the same 2A 250V. So I can make them fit.
Should I investigate something more before I put the power on again?

[diif]

Re: Samsung UE40C6000RWXXN clicking power board issue

I have new fuses. They are bigger then the original because otherwise I had to wait too long. But the value is the same 2A 250V. So I can make them fit.
Should I investigate something more before I put the power on again?

Did you change the mosfets or is it just the fuse you have replaced ?

[sepper]

Re: Samsung UE40C6000RWXXN clicking power board issue

Did you change the mosfets or is it just the fuse you have replaced ?

Just the fuse. Are the mosfets broken according to my measurements?

[budm]

Re: Samsung UE40C6000RWXXN clicking power board issue

Time delayed fuse for the replacement?
Change the MOSFETs, the IC that drives the MOSFETs may be damaged also.

[sepper]

Re: Samsung UE40C6000RWXXN clicking power board issue

Time delayed fuse for the replacement?
Change the MOSFETs, the IC that drives the MOSFETs may be damaged also.

Arghhh.. I missed it completely because I wanted to order before the shop closed -.-. I got a slow blow...

I think I just order myself a new board found one on aliexpress for 25 dollar that's the same price I spend on the components already because I bought them x25

I'm just to noobish to fix this myself I guess. So I better spare you guys time But I would like to thank all of you for the incredible help and fast responses!

[budm]

Re: Samsung UE40C6000RWXXN clicking power board issue

Time delayed = Slo-Blo

[sepper]

Re: Samsung UE40C6000RWXXN clicking power board issue

Time delayed = Slo-Blo

Oh ^^

Well , I soldered my fuse. And I thought let's just give a try Plenty of fuses in the house. But I plugged in and it blew my fuse holder of FS801S out of my soldering. But I think it's not broken. So little bit scared to plug it in again =/

[budm]

Re: Samsung UE40C6000RWXXN clicking power board issue

Expected that with shorted MOSFETs.

[sepper]

Re: Samsung UE40C6000RWXXN clicking power board issue

Expected that with shorted MOSFETs.

I bought another powersupply from aliexpress. Well... It doesn't make the click sound anymore. But now I got no picture only sound I do got backlight and I don't see something when I shine a flashlight on it.
Any tips to investigate?

[sepper]

Re: Samsung UE40C6000RWXXN clicking power board issue

Nvm. Fixed it My connection to the t-con board was not good. But now it's ok and tv is working So case closed