Author Topic: Identifying inductors and testing link switch for condenser dryer pcb.  (Read 369 times)

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Offline Aglovale

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Hi all. I am trying to repair my condenser dryer -It won't power on- and I need some help if possible. I have been testing caps, diodes and relays without any faults found as of yet. However, while I was testing inductors I noticed odd readings from 3 inductors in particular. According to the colour bands on  3 inductors in picture 1, (only 2 are in picture 1 as the other was de-soldered for testing. however, the de-soldered one is identical to the blue circled inductor - even in readings) the ohms seems to be way off. According to Digi-key web site, the blue circled inductor (Yellow, violet, red and silver band) should be 4700uf and I have a reading of approx 17ohms. The red circled inductor (brown, black, black and silver band) should be 10uf and I'm getting a reading of approx 0.6ohms; all 3 inductors are approx 10x4 mm in size.
I found it strange that all these inductors were faulty. However, after some research it seems that the link switch (Picture 2, circled in purple) commonly fails on these boards and can damage resistors (maybe also inductors?) in in the process - from what I have read. The other option of course is that I'm reading the bands incorrectly.
Can someone help me identify the resistors and maybe tell me if there is anyway I can test if the link switch is working correctly (as I am not familiar with them).
Thank you.
« Last Edit: April 06, 2019, 08:35:35 pm by Aglovale »
 

Offline coromonadalix

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they are inductances not resistors, and the hint is L2 and L3 on the pc board

Inductor Colour Codes
http://www.learnabout-electronics.org/ac_theory/inductors04.php
« Last Edit: April 06, 2019, 07:52:53 pm by coromonadalix »
 
The following users thanked this post: Aglovale

Offline Aglovale

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they are inductances not resistors, and the hint is L2 and L3 on the pc board

Inductor Colour Codes
http://www.learnabout-electronics.org/ac_theory/inductors04.php

Thank you so much, I am fairly new to electronics - as my ignorance indicates - I've edited title and description to reflect on your information.
« Last Edit: April 06, 2019, 08:16:39 pm by Aglovale »
 

Offline Aglovale

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Ho do I test inductors ?
« Last Edit: April 06, 2019, 08:35:51 pm by Aglovale »
 

Offline coromonadalix

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Well the cheap way is : to test them as a short,  if they read something in ohms they may be good since you dont have "infinite / open" value

The official way is to test them with an lcr meter
 


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