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12-14-2020, 01:40 PM
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#1 |
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ajshoe
Join Date: Dec 2012
City & State: cincinnati, ohio 45215
My Country: usa
Line Voltage: 120VAC 60HZ
I'm a: Hobbyist Tech
Posts: 418
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Whirlpool dryer control bd part #3978918. Also wp8546219
Have a whirlpool duet control board - part #3978918. Also wp8546219. Does anybody recognize what this SMD transistor is ? Also the 2 diodes ?
xsistor reads R58 P1F Last edited by ajshoe; 12-14-2020 at 01:51 PM.. |
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12-14-2020, 02:55 PM
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#2 |
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Badcaps Veteran
Join Date: Mar 2015
City & State: milwaukee,wi
My Country: usa
Line Voltage: 120VAC/60HZ
I'm a: Knowledge Seeker
Posts: 1,111
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Re: Whirlpool dryer control bd
You will have to clean up the diodes with some acetone and then play with your camera or phone by taking photos at different angles to be able to see what markings are on them. Budm can tell us more about the transistor or regulator of whatever it is.
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12-14-2020, 03:02 PM
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#3 |
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ajshoe
Join Date: Dec 2012
City & State: cincinnati, ohio 45215
My Country: usa
Line Voltage: 120VAC 60HZ
I'm a: Hobbyist Tech
Posts: 418
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Re: Whirlpool dryer control bd
thanks, wasn't sure what to use to get that protectant off.
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12-14-2020, 03:10 PM
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#4 |
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Badcaps Veteran
Join Date: Jan 2015
City & State: worcester
My Country: United Kingdom
I'm a: Knowledge Seeker
Posts: 3,601
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Re: Whirlpool dryer control bd
3rd pic i see a cracked solder joint .it might be the problem
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12-14-2020, 04:34 PM
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#5 |
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Badcaps Veteran
Join Date: Jun 2012
City & State: ☻
My Country: Canada
I'm a: Professional Tech
Posts: 8,843
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Re: Whirlpool dryer control bd
The transistor is an Onsemi PZT2222AT1, Petehall347 is correct about the poor solder connection, I would check all the larger connections for similar poor solder connections. It might be better to post the actual problem you are having.
Last edited by R_J; 12-14-2020 at 04:38 PM.. |
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12-14-2020, 08:28 PM
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#6 |
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Leaking Member
Join Date: Dec 2014
City & State: Atlantic Canada
My Country: Canada
Line Voltage: Ground, 0Hz
I'm a: Hobbyist Tech
Posts: 5,684
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Re: Whirlpool dryer control bd
thats cracked for sure.
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12-14-2020, 08:50 PM
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#7 |
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Badcaps Veteran
Join Date: Feb 2014
City & State: Home Town
My Country: USA
I'm a: Knowledge Seeker
Posts: 271
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Re: Whirlpool dryer control bd
Yes
That bad solder joint belongs to K1 heater relay. |
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12-14-2020, 09:48 PM
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#8 |
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ajshoe
Join Date: Dec 2012
City & State: cincinnati, ohio 45215
My Country: usa
Line Voltage: 120VAC 60HZ
I'm a: Hobbyist Tech
Posts: 418
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Re: Whirlpool dryer control bd
I see bad solder joint in pic - unfortunately I have 2 boards - one works - other has burnt relay, trans, and maybe diodes. check in morning.
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12-16-2020, 05:25 PM
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#9 |
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ajshoe
Join Date: Dec 2012
City & State: cincinnati, ohio 45215
My Country: usa
Line Voltage: 120VAC 60HZ
I'm a: Hobbyist Tech
Posts: 418
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Re: Whirlpool dryer control bd
looked at both boards - the one that heater relay is burnt - solder joints were good. The good board which I installed and ran 2 loads of clothes was bad but it worked liked that for 2 loads. Fixed solder joints - still works ! waiting on PZT2222AT1 and diodes to repair burnt board. want to thank all who replied - didn't see cold solder joint, I'm pretty sure it would have failed in the near future !
Last edited by ajshoe; 12-16-2020 at 06:34 PM.. |
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11-14-2021, 06:24 PM
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#10 |
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New Member
Join Date: Jun 2010
Posts: 1
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Re: Whirlpool dryer control bd
ajshoe,
Did you get your whirlpool duet control board fixed with the PZT2222AT1 and diodes? |
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