Powersupply washingmachine. Relay problem?

[dacidaci]

Re: Powersupply washingmachine. Relay problem?

Hi, I have similar problem, so I will not open new thread. First of all sorry for my bad english.

So, I have same washing machine with same mother board. My problem was same as Moreno83 so I decided to resolder all joints. I made so stupid mistake, used flat screwdriver to clean silicon from the bottom side. During cleaning I shorted something (small spark was visible), didn't remembered what it was. Now washing machine is dead , no power at all. I replaced both KIA78R05PI with KA78R05CTU and KIA78R15PI with KA78R15CTU. I also replaced all 7 optocouplers. I have 230V on relay but on bridge rectifier middle pins is only 3V AC. Any help is useful.

Thank you!

[dacidaci]

Re: Powersupply washingmachine. Relay problem?

I attached photo to previous post but it doesn't show it, so here is the link of a photo.

https://imgur.com/a/R5qFFkH

[R_J]

Re: Powersupply washingmachine. Relay problem?

There is a small (black) square fuse near the large heatsink labeled F2, check it, If you are lucky thats all that's blown.

[dacidaci]

Re: Powersupply washingmachine. Relay problem?

Both fuses are ok :/

[dacidaci]

Re: Powersupply washingmachine. Relay problem?

Solved, one smd jumper was demaged. R_J thank you for the replay

[ktmmotocross]

Re: Powersupply washingmachine. Relay problem?

Hi, I have similar problem, so I will not open new thread. First of all sorry for my bad english.

So, I have same washing machine with same mother board. My problem was same as Moreno83 so I decided to resolder all joints. I made so stupid mistake, used flat screwdriver to clean silicon from the bottom side. During cleaning I shorted something (small spark was visible), didn't remembered what it was. Now washing machine is dead , no power at all. I replaced both KIA78R05PI with KA78R05CTU and KIA78R15PI with KA78R15CTU. I also replaced all 7 optocouplers. I have 230V on relay but on bridge rectifier middle pins is only 3V AC. Any help is useful.

Thank you!

Damn dude you replacing silicone with power on?

[gero4all]

Re: Powersupply washingmachine. Relay problem?

Hi,

i have problem with same typ Samsung Washing machine.

Machine don't wont run the drum. I check both KIA and voltage are ok ( 5V and 15V ).

When start button is pressed then also is visible changes on the voltage output on all three pins of the IKCM15F60GA ( 20,21,22 ) but only short time. It sims that something else switching voltage of.

Can anyone help me?

Thx

[gorm2]

Re: Powersupply washingmachine. Relay problem?

Hi, I need help. I break down some resistors, R4 and R75, and I need to find out their value.
Thanks.

[stj]

Re: Powersupply washingmachine. Relay problem?

Hi, I need help. I break down some resistors, R4 and R75, and I need to find out their value.
Thanks.

make, model etc would help!

[gorm2]

Re: Powersupply washingmachine. Relay problem?

samsung DC41-00189A

[gorm2]

Re: Powersupply washingmachine. Relay problem?

Samsung washing machine mainboard DC41-00189a

[budm]

Re: Powersupply washingmachine. Relay problem?

Please start a new thread, make sure to provide make and model and good clear pictures of the boards.

[martinetto]

Re: Powersupply washingmachine. Relay problem?

Hi everyone, the brushless motors mounted in the direct drive washers machines are powered by a three-phase DC system that unlike the classic inverters is modulated and rebuilt an AC alternate sinusoid for classic induction motors ... if you look at the nameplate of this motor you will see that the two washing and spinning steps are reported with the nominal values of voltage and wattage ... in DC ...

[Lalabarrett]

Re: Powersupply washingmachine. Relay problem?

Solved, one smd jumper was demaged. R_J thank you for the replay

I have the same issue. Something shorted.

Can you tellme what Smd jumper you changed?

Please help me

[roadhogg]

Re: Powersupply washingmachine. Relay problem?

Hi. I've just been looking over this sort of machine set up. And I'm try to figure out a way to adjust motor speed. is there some kind of variable signal wire.

[R_J]

Re: Powersupply washingmachine. Relay problem?

Hi. I've just been looking over this sort of machine set up. And I'm try to figure out a way to adjust motor speed. is there some kind of variable signal wire.

The microprocessor outputs the frequency for the motor drive ic, so there is no simple solution.