# Samsung inverter board LED Fail

#### tedstruk

Jan 7, 2012
476
I was given an old 2017 smart fridge that has 3 PCB boards in back. 1. The mains board, 2. The "Inverter Board", and 3. The system board. All the controls on the front panel work, the thermostats appear to be sending signal properly, and all the lights inside the fridge turn on when its plugged in! wow..

#### roughshawd

Jul 13, 2020
255
yep.. pro handyman.. I got just about everything anybody needs to do anything with....
I got rid of my torches because I was getting razzed by the refrig and ac guys... so guess what has happened...
I pulled the inverter board out, sucked a vacuum into the system, and it stuck at 10 all night, and then I used the reset codes in the repair manual, and the inverter light came on!!!! wow what a find...! Still haven't Identified the to connectors yet, although it is supposed to have some kind of option that plugs in there... maybe some other day...

#### roughshawd

Jul 13, 2020
255
I got the fridge part cooling yesturday. This is a blast! I am really having alot of fun!!!

#### roughshawd

Jul 13, 2020
255
Freezer isn't working now, but, and I say but...
The inverterboard has power running across the top of the caps.... I mean is it supposed to shock me when I touch the top of the caps???

#### roughshawd

Jul 13, 2020
255
inverter was flashing 3 times, said something about wrong polarity somewhere, then it flashed 4 times said something about the soldering terminals on the bottom of the inverter board, and then I thought maybe I would touch the two caps on the board...!!!!!

#### roughshawd

Jul 13, 2020
255
This is the one that shocked me.
Index finger on one cap, middle finger on the other, apply slight pressure... WOW.... WHAT A RUSH!!!

#### Attachments

• samsinv.jpg
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#### roughshawd

Jul 13, 2020
255
So if it is an intermittent problem, then the drill down says, loose connection somewhere...
I checked the back side of the board for solder fails.... looks good...
there is a 5 pinout says Test 1 Test 2 NRST (nothing) Grnd, what is NRST(reset?) and what is the testing that needs to be performed?

#### roughshawd

Jul 13, 2020
255
The board, um forgot what I was gonna ask everytime I log on.... let me think... duh hey
I REMEMBER !!!!!!!
I REMEMBER !!!!!!
I REMEMBER !!!

The inverter board is 220v and says
ISB-LC3_3050_V2
VDE 220-240~50Hz T85
220V-60Hz

200-240V |100-127v
250v-T5AL | 250V T6.3AL

Its a 220v fridge in a 120v country...

#### roughshawd

Jul 13, 2020
255
Can I buck convert a 100v?

Oct 5, 2014
5,995

#### roughshawd

Jul 13, 2020
255
Thanks I knew I was missing something (or alot of something!)

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