Need help with a wine fridge controller board.

[dropfry]

Model: Frigidaire FFWC18L2QB
Board: FX101B PCB16006F1 110 HANYI

This fridge was turning on, but wouldn't cool and the fans wouldn't spin in the back. Removed the back panel and found two controller boards and a power supply. The controller board at the top had burn marks under two heatsinked transistors (photo titled Top_Left). They said 13005D on them. I could not find those in America, so after a lot of googling and cross checking datasheets it looks like E13005 are replacments. Tested them with the diode setting and they both look good.

Put the board back in and just got several beeps. So I disonnected that control board and slowly started connecting cables one by one. Turns on and all fans spin with all cables connected except for the peltier device.

My curiosity got the better of me and I put my hand on the headsinks to see if they were warm, and I got an electrical shock. Oddly everything was still running. No fuse has blown out.

Checked all diodes, they look fine. The resisters connected to the mosfats that blew are ok as well. No sure what to check next.

[CapLeaker]

Re: Need help with a wine fridge controller board.

13005 aka MJE13005 aka PHE13005 etc. The MJE, FJP, PHE13005 and PHD13005 (with body diode) you can get tons at DigiKey, Mouser, etc. Maybe put a 13007 in? These 1300x are NPN transistors.

The D in 13005, like 13005D, is the gain (hfe) of that device.

Oh! Btw… clean that black crap off on the back off the PCB. If push comes to shove, use Acetone.

[lotas]

Re: Need help with a wine fridge controller board.

In this board, all those Chinese electrolytic capacitors were more likely to suffer from such heat from the radiator!

[dropfry]

Re: Need help with a wine fridge controller board.

13005 aka MJE13005 aka PHE13005 etc. The MJE, FJP, PHE13005 and PHD13005 (with body diode) you can get tons at DigiKey, Mouser, etc. Maybe put a 13007 in? These 1300x are NPN transistors.

The D in 13005, like 13005D, is the gain (hfe) of that device.

Oh! Btw… clean that black crap off on the back off the PCB. If push comes to shove, use Acetone.

I already bought the E13005 and put them in. Are they the wrong replacement and why the heatsink shocked me?

Will try the acetone. So far tried goo-gone, 91% ipa and naptha.

[CapLeaker]

Re: Need help with a wine fridge controller board.

Some power supplies have a "live heat sink" That's one of the reasons why you should be very careful on the primary side of a power supply. Keep in mind that the center pin and the tab are connected together in this device and are the Collector. So yes, it's gotta have power to it. Would this heat sink be grounded and didn't isolate the tab from the heat sink, the 13005 blows as soon as you turn the PSU on.