79571053011 Kenmore fridge compressor FC75LBNA failed

[mirak27]

HELLO,
My  79571053011 Kenmore refregirator , the Original compressor FC75LBNA failed, it seams the LG TCA38151706 universal compressor is the required replacement  , and needs the Software: CJT30000002 jig for the PCB mother board update.
Opened the enclosure cover , I could see two mother boards : EBR656402 and EBR650027 ,
Question:
1-   Which of the two mother bords are to be SW updated ? or both ?
2-   If so , is the mother board updatable ? could not find out the information on LG bulletin ?
Thank you in advance for the help !
Mirak .

[exIL8zvD-n6NV]

Hey Mirak, what's your progress on this? I'm in the same boat and trying to figure out do I need to order a replacement compressor with the jig, or this board isn't updateable, so I need to find the original compressor on some junk sale.

[mirak27]

Hi exIL8zvD-n6NV :
So far still, no answers, it looks like the MB is not updatable , so need to replace with the same original compressor (FC75LBNA)

[exIL8zvD-n6NV]

I see, but that's sort of suboptimal, these compressors aren't manufactured anymore so one will have to rely on a rare stockpiled compressor sale and the price is pretty high (what I've found was $350 plus shipping), and another issue the replacement one will also probably fail prematurely.

[beaneo18]

Hi, the upper board is the inverter board that supplies power to the compressor. The lower is your main board. The white connector that is open on right side is the software upgrade connector. Connect the white connector of jig to this connector and it will update. If it fails, use the red connector on the jig. Do not use the original compressor again as it WILL fail. Hope this helps.

[mirak27]

To exIL8zvD-n6NV: thank you for your comment , now we have the confirmation from  Beano18 
Thank you Beano18 for the clarifications, I appreciate, I'll proceed with the LG TCA38151706 universal compressor is the required replacement  , and needs the Software: CJT30000002 jig for the PCB mother board update.
 

[gmcmicken]

To exIL8zvD-n6NV: thank you for your comment , now we have the confirmation from  Beano18 
Thank you Beano18 for the clarifications, I appreciate, I'll proceed with the LG TCA38151706 universal compressor is the required replacement  , and needs the Software: CJT30000002 jig for the PCB mother board update.

Were you able to successfully update the software on your PCB mother board with the JIG tool?

[gmcmicken]

I confirmed with an LG technician this board cannot be updated. I had to change the main PCB and the inverter board in order to support a universal compressor. Good news is my fridge is working again, but significantly more expensive than a firmware update.

[moto-scoot]

how did you do the update on the two boards
do you only update one with them hooked up? or do you do both seperate?
have a kenmore with this split board system

[baldwinappliance]

Most can be updated. Best to try to update before replacing the board. I think I have only come across 1 or 2 out of about 300 that could not update and I was forced to replace the board. Even some of the ones listed as “must replace board” have been able to update.

Ask the technician to try the update first. If unit is older than 2014 I always try to update when I check for leaks before I order compressor. That way I know it can update.

[mirak27]

SOLVED.
I did update succefuly my KENMORE ELITE Fridge PCB . In order to achieve the update the following points are to be followed:
1- Only the upper PCB # EBR65640204 needs to be updated , the software writer is to be connected to the port CON 203, see attached photo I took .
2- Before connecting the S/W , the S/W writer (CJT30000002  -  FLD2 v8.9 ) as purchased and shipped can not work , you have to swap the jig connector pins in order to match the port CON203 same pins sequence )
Tx= green ; Rx=red ; Vcc=purple ; GND= White ; Test / W = brown.
3- Proceed to the update by following the provided instruction document provided with the S/W package
4- proceed to installation of the LG universal compressor FLSO95LANA and do not forget to connect the compressor harness at 45 deg anticlock wise to the new compressor .

Note . NOW My KENMORE ELITE FRIDGE IS  WORKING PERFECTELY , I’m happy .

[mirak27]

Attached pictures to my previous post

[moto-scoot]

Thank so much for the updates.
I was told the newer boards already have the updates.
i have:
top inverter board 210115 build date
lower board 200717 build date
Can anyone confirm this?
Where did you get info that only top board needs updated?

[mirak27]

Hi moto-scoot,
My KENMORE ELITE refregirator  upper and lower mother boards were built on 2011 .
I was told through one post ( see the posts chain ) that the lower mother bord is to be updated , it’s not true , I tried to do it but did not work , I did connect to the upper board CON203 where it was printed « FOR MONITORING » see photos I posted and it worked after abviously swamped the jig wire pins as explained previously, this is my proper experience .
Hope this helps .
Mirak27.

[ronjack]

Would you know if the FLS075LANA compressor needs to be updated, please? It repaced an LG FC75LBNA