11 replies to this topic

[Aram]

Hi folks:

I an electronics engineer, and want to repair my oven PCB panel. I am getting an F-1 code (model #KEBS208BWH2). I think it is eiher a chip or a transistor that I may have. Most people just change the PCB, but I have the skills to repair it, depending on the electronic component that's bad. The controls for the lower oven is the problem. Anybody have a service manual or schematic for the PCB?

Thanks!

Aram:)

[Samurai Appliance Repair Man]

F1 might be a bad sensor.

[Aram]

Okay....So where would one go to actually find out?

Thanks!

Aram

[Samurai Appliance Repair Man]

How 'bout just checking the sensor to see if it's bad?  :beating:

[Aram]

Well...I guess that would work if it were blown open assuming F-1 means temp sensor. I am assuming it is a thermistor of about 1.2-3K ohms. If it were out of spec, it might also show an F-1. I don't know what the resistance should actually be.

Do you think I can check it in the oven or do have to go to the PCB side (which is a pain).

Opinions oh great Samurai???

Aram

[The Seven]

You need to disconnect the oven sensor and measure its resistance at room temperature. Tell Sumurai the measured value and he will advise you.

[Aram]

Great! Give me a day or two... I'll be back..

grasshopper

[iceman]

Hey Aram, here is a handy safety tip:  On this board, stuff in bold contains links whick more often than not bring satori.  Read the posts above over again...and marvel.

Regards,

[Aram]

Good Morning Master!

Well I located the cheat sheet that I had on file and and F-1 means its the control board. An F-3 is the temp sensor. Now that I am on the right track, I need to troubleshoot the PCB at board level. I think I have the IC's. A rebuilt board is about $200. I'll try to repair it first. I am pretty confident.

Aram

[Moostafa]

Hello, my confident friend.  Let me be the first to congratulate you on what it sure to be a stunning victory over the infidel forces of entropy that continually assault our appliances.  Please, post photographs of your battle and glorious handiwork, along with the tech sheet for your oven so that we may all stand together in awe at your formidable repairing prowess.

[The Seven]

Hi, Electronics engineer, we greatly respect your knowledge of how to re-solder an IC. You may have the right code.

But don't put all your trust in the codes as you know they could be also wrong. Use them as a guide for diagnosis and repair.

Why not make sure that the sensor is OK before proceeding re-soldering?

The Seven.

p.s. I soldered my first tube-radio/amplifier before the advent of ICs.

[Aram]

Well Folks:

I looks like both sensors are good, approximately 1k ohm. Replaced several ic's check resistors and diodes with no luck. It could be the main uC(that's a specifically programmed in house part). I think I have to throw in the towell at this point and replace the whole board. OUCH!

I know the actual board is manufactured by a company called Appliance Control Technologies, but I could not find a phone number for them to try to get a schematic.

Aram

Thanks... everyone:(