Printed Circuit Board Repairs for Tumble dryers AEG, Electrolux, Zanussi Etc

by / Thursday, 18 December 2014 / Published in Tumble Dryers

The video is on a common repair that i have to do on the ENV06 PCB and will show you just one of the faults that can occur 

Tumble Dryer Parts

 

Even if you’re not a technician or an engineer, some Tumble dryer printed circuit board problems are obvious. Some common and simple problems can cause a printed circuit board not to work.
A thorough visual inspection of your tumble dryer PCB could save you having to buy a new board they can cost over £150 plus a needless engineers bill. Don’t be afraid to have a look. Just make sure your power is turned off to make sure you don’t get an electric shock.

The front of a Printed circuit board  Env 06

The front of a Printed circuit board Env 06

The back of a Printed circuit board  Env 06

The back of a Printed circuit board Env 06

board in housing

Make sure it’s unplugged from the electric supply, now check all the connections are good tight and the pins are clean as you can get corrosion build up due to moister. You can Remove the cover from your tumble dryer PCB.

If the previous has not cured your problem you now need to remove the printed circuit board from the tumble dryer facial panel. Dryer covers are held on with screws and clips; this can vary from on different manufactures and models of tumble dryer.

A typical blown track on a tumble dryer

A typical blown track on a tumble dryer

Look out for Dry joints

Look out for Dry joints

Make sure all the terminal connections are clean and not corroded a biro rubber does a great job

Make sure all the terminal connections are clean and not corroded a biro rubber does a great job

Look out for burnt joints

Look out for burnt joints

The first inspection should be to check all the tracks on the circuit board look for water damage and also burnt tracks, due to the nature of the appliance there can be quite a lot of humidity on the board especially if the dryer has been kept in a very cold room or garage. Condenser dryers are more prone to this than normal vented dryers.

 

You are having to go into the realms of Electronics and if you do not know what you are doing you can cause more harm than good. You need to check for signs of damage to Components like Capacitors, Resistors, Diodes, Triac’s and the link Switch which fails so often on this type of tumble dryer. (Please note that when the LNK 304GN u. TNY264G blows the 47R Resistor also has blown) and you need to check all the Resistors & Diodes. I have put together a load of pictures on these Env 06 boards so you can get an idea of what to look for.

 

 

 

These pictures will help you understand some of the common chips that blow and there not always obvious

blown link Switch LNK 304GN and 47R Resistor

common chips to fail on tumble dryers

cutting the link Switch LNK 304GN

A typical blown track on a tumble dryer

A typical blown track on a tumble dryer

link switch removed

Resistor 47R before and after

Tumble dryer resistors & diodes to check

01_Dec._13_21.25

304 link switch

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If you are not sure take the circuit board to someone that does what they are doing!!

Circuit Board numbers Env 06- 125988033 theses are fitted to all these makes  Electrolux, AEG, Arthur Martin, Elektro Helios, Eureka, Faure, Frigidaire, Gibson Appliance, Husqvarna, Kelvinator, Marijnen, Parkinson Cowan, Progress, Simpson, Tornado, Tricity Bendix, Volta, Westinghouse, Zanker, Zanussi, Zoppas,




48 Responses to “Printed Circuit Board Repairs for Tumble dryers AEG, Electrolux, Zanussi Etc”

  1. ilium007 says : Reply

    Hi – thanks for your great information ! My Mum has a Bosch dishwasher with a blown input resistor that feeds AC to the LNK304 surface mount IC.

    The input resistor is blown / cracked and I can’t properly ready the colour bands to work out the replacement value (I don’t think the value is *that* critical and should be abel to find something via the LNK304 datasheet). The LNK304 chip doesn’t look blown but it is probably what has caused the input resistor to fail.

    Do you have any recommendations on the resistor value ? I am thinking 47 Ohm 3W or 22 Ohm 3W. I have linked a couple of pictures. I had already cut out the resistor ready for desoldering.

    https://dl.dropboxusercontent.com/u/973862/bosch/IMG_0299.JPG

    https://dl.dropboxusercontent.com/u/973862/bosch/IMG_1176.JPG

    Happy to buy you a buy through your website if you can help !! Cheers

  2. morteza says : Reply

    I’m not covering the Iranian Morteza Hi I’m over my bucket repair automatic washing washing machine repair training I was looking for but could not find the site I found you. If your washing machine instruction file to the e-mail you send for me thanks

  3. Gianluca says : Reply

    Hello friends, i have a pcb fault.. the trouble is the r3 r4 r6 r7.. of this resistor i don t know the value. Can you post a photo of this part? Thank you

  4. Niklas says : Reply

    I have the same board as shown in the video above in electrolux dryer but a different issue.
    Simply I do not get any power at all when turning on the dryer.
    I have checked and I have the power in the connector to the boarrd but then nothing more happend.
    I suppose I have an component issue on the board since I do not get any power, but where should a start to check. I do no see any obvious when checking the manually
    Do you have any advise where to start search?

  5. Paulo Guarnieri says : Reply

    Thanks very much for the precious instructions!
    I replaced one 4.7uF/450V capacitor and the IC LNK306 from the power PCB of an Electrolux tumble washer LTE12F and the no power problem was solved!
    The PCB was covered with a thick layer of silicone and to remove the components without damaging the board was not so easy to do.

  6. jeff says : Reply

    Hello, I have A frigidaire Dryer with E68 code. I do not have a stuck button but the dryness button isn’t functional. I would like to add a 10k resistor pull down to ground on the other side of the button. I have fixed a few circuit boards in my day and feel confident I could repair this one,. Could your send me a diagram or picture of where the resistor should go. Thanks you so much.

  7. Sjaak says : Reply

    Thanks for explaining.
    After 5 years my 47 ohm fusable resistor is split in two and the lnk624 is broken. I don’t have or see an inductor.

    Some other site suggest to replace the resistor with a higher version. So 33 -> 47 and 47 -> 100. This to prevent the same thing in the near future.

    The reasoning is that the chips can’t handle spikes on the net very well and a higher value will protect the chip.

    What do you think? Is this best practice to fix a design flash or a potential fire hazard?

  8. djoene says : Reply

    hi i have a electrolux edc68555W that does not want to turn.
    i kan select the drying program but nothing happens i do hear a relais clicking (alternating relais i suspect) from time to time but machine does not turn. after reading about the diagnose menu i have error code of 5 red lights and 14 green after i do diagnose step 2 (second position of the selector switch (pump test) can anyone tell me what this error is as E514 does not exist.

    rgds

  9. Patrik Carlsson says : Reply

    Spot on, you are a life-safer. Cheap electrolux with no lifesign at all but the same resistor and switch-IC showing signs of short circuit.

  10. stefano says : Reply

    I nave the esame problemi with a rex dryer solarex , the first time i have changed the lnk304 with the lnk304pn DIP , the second time was opened the resistor 4,7 ohm 2watt , now , i can’t find the trouble , bit the board si dead , i don’ t understand the values of d5 diede UM18 band TSRI diode , the board si the same of your photos ,one phase arrive just the lnk , but the other stop at little driver AC SMD mps108 , in apparence , alla parti check are good , resistors , big condenser , anyone nave a schematic of this main board ? thanks for yr helps .

    Thanks at all , i hope in yr help ! Stefano

  11. Apostolos says : Reply

    Hi Paul,

    I have an electrolux EDI97170 which needed the resistor + LNK fix. However, now it shows EC7 or ECO depending on the selection. I’ve seen that EC7 could possibly mean a connector issue related to pump (or wiring or the pump itself). Do you know which connector is that? (I could not find the service manual to identify the correct connector). Also, since this is for a pump.. do you know which relay may be related to the pump? (thinking out of the possibility that the relay needs replacement).

    Thanks!

  12. Freek Weggeman says : Reply

    My machine is a Zanussi. It is completely dead. Nothing goes on. I found somewhere else that the powerpart on the print need to be replaced in that case. What are they?

  13. Steve Gaiger says : Reply

    Good day,

    I have this circuit board and the 47 ohm fuse was burnt exactly as per the example shown, only difference is yours was cracked and mine was burnt. Cannot make out the values, but I can see from yours it is 47 Ohms, 5% tolerance and 3W. As I look to purchase, there are still many combinations (including Voltage/element type (i.e. ceramic, metal film etc) that I do not know what is important. This is for a UK AEG 240 V unit. Appreciate any advise to ensure I select the correct resistor.

    Many thanks!

  14. raino francesco says : Reply

    sulla scheda lp712236 vorrei sapere il valore dello zener con sigla dz2 grazie.

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