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davenn
Moderator
hey Kerberus
welcome to the forums
sounds like some fun stuff.. keep in touch with the forum and let us know who its all working out
cheers
Dave
davenn
Moderator
hi Trista
welcome
thats a good range of interests you have there
Where in China are you ?
cheers
Dave
Hello everyone,
I've visited many times & learnt a lot but until now I have not posted.
I gather here is the place for new posts for those in my position.
So recently our Fisher & Paykel domestic washing machine stopped working with a bang & blew the house RCD breaker.
I investigated & quickly found a blown power component on the motor control board.
Now Fisher & Paykel have a great patented system they call SmartDrive. They have eliminated gearboxes & belts by building a hi torque "pancake motor" which they control through all phases of the machines cycle.
It's all rather clever but the execution is questioned by many.
For example the motor control board power components are all water cooled via an aluminium pipe that runs the length of the circuit board & to which the power components are clamped. Surprisingly they seem to have this part of the execution well managed.
In my case I found a blown 3 pin PWM switch (Power Integration TOP224Y). The source pin had disintegrated & the body had shed carbon over the circuit board & board components in it's immediate vicinity.
So I figure that if I remove the local components & clean up the board, then replace with new components I have a chance at least of a repair.
Of course the fault origin could lie elsewhere but I have a service manual which allows various resistance checks which is all any serviceman could do if he was fitting a brand new board.
BTW new board cost $170.................Ahhhhhhh
The board area concerned is too small for me to get a decent pic although for anyone with a wider interest in this unusual control solution I'd be happy to take a few CB pics.
In all I have removed:
2 x electrolytic caps (22UF & 220UF - 35VDC )
1 x TOP224Y 3 pin switch
1 x Zener transient voltage suppressor (P6KE200A by Motorola)
1 X Ultra fast Avalanche Sintered Diode (Vishay BYV26C)
1 x Unknown very small diode like component body length about 2.5-3 mm X Diam about 1.2-1.5mm
Obviously I can obtain all the identified components but with one unknown this is not going to help much.
The manufacturer is extremely resistant to detailed help & no-one here attempts board repairs so I am styied for now.
My suspicion is a Schottky, but I can't find any made this size.
The component may be intact (assuming my clumsy de-soldering was not destructive) so if I knew what tests to run that would be one avenue for further investigation.
Both sides of the CB & all other components appear perfectly normal.
The circuit is quite complex & without component removal for ID it's hard to specify what the other components are exactly.
Could someone please suggest my best course of action from here.
I have tried to provide enough detail but please ask if you need more.
Thanks
Peter O
I've visited many times & learnt a lot but until now I have not posted.
I gather here is the place for new posts for those in my position.
So recently our Fisher & Paykel domestic washing machine stopped working with a bang & blew the house RCD breaker.
I investigated & quickly found a blown power component on the motor control board.
Now Fisher & Paykel have a great patented system they call SmartDrive. They have eliminated gearboxes & belts by building a hi torque "pancake motor" which they control through all phases of the machines cycle.
It's all rather clever but the execution is questioned by many.
For example the motor control board power components are all water cooled via an aluminium pipe that runs the length of the circuit board & to which the power components are clamped. Surprisingly they seem to have this part of the execution well managed.
In my case I found a blown 3 pin PWM switch (Power Integration TOP224Y). The source pin had disintegrated & the body had shed carbon over the circuit board & board components in it's immediate vicinity.
So I figure that if I remove the local components & clean up the board, then replace with new components I have a chance at least of a repair.
Of course the fault origin could lie elsewhere but I have a service manual which allows various resistance checks which is all any serviceman could do if he was fitting a brand new board.
BTW new board cost $170.................Ahhhhhhh
The board area concerned is too small for me to get a decent pic although for anyone with a wider interest in this unusual control solution I'd be happy to take a few CB pics.
In all I have removed:
2 x electrolytic caps (22UF & 220UF - 35VDC )
1 x TOP224Y 3 pin switch
1 x Zener transient voltage suppressor (P6KE200A by Motorola)
1 X Ultra fast Avalanche Sintered Diode (Vishay BYV26C)
1 x Unknown very small diode like component body length about 2.5-3 mm X Diam about 1.2-1.5mm
Obviously I can obtain all the identified components but with one unknown this is not going to help much.
The manufacturer is extremely resistant to detailed help & no-one here attempts board repairs so I am styied for now.
My suspicion is a Schottky, but I can't find any made this size.
The component may be intact (assuming my clumsy de-soldering was not destructive) so if I knew what tests to run that would be one avenue for further investigation.
Both sides of the CB & all other components appear perfectly normal.
The circuit is quite complex & without component removal for ID it's hard to specify what the other components are exactly.
Could someone please suggest my best course of action from here.
I have tried to provide enough detail but please ask if you need more.
Thanks
Peter O
intro
hi - working my way through Electronics for Dummies. Looking for a forum for my random "wait..what?" moments.
I'm interested in being able to fix things around the house, as well as crud I find at goodwill
Mostly just curious - never had a good grasp on electricity, so figured I'd just jump on in.
Current projects are:
-broken amp (have pulled one cap, and trying to ID some parts)
-testing various pieces of junk to see why they are broken
hi - working my way through Electronics for Dummies. Looking for a forum for my random "wait..what?" moments.
I'm interested in being able to fix things around the house, as well as crud I find at goodwill
Mostly just curious - never had a good grasp on electricity, so figured I'd just jump on in.
Current projects are:
-broken amp (have pulled one cap, and trying to ID some parts)
-testing various pieces of junk to see why they are broken
Hi kcroy
welcome to electronics point
hopefully you will sit back and make yourself comfortable
cheers
Dave
thanks!
Hi, I'm Jose, from mexico, I'm industrial electronics tech and avionics tech.
Bienvenidos from Germany, Jose.
Harald
Harald
thanks a lot
Hello everyone
I am new to this forum.Hope you will help me out in my difficulties!
Thanks
I am new to this forum.Hope you will help me out in my difficulties!
Thanks
Hello
I'm in Canada, I do electronics as a hoby (mostly analog elect) since 1983
Bye
Gaetan
I'm in Canada, I do electronics as a hoby (mostly analog elect) since 1983
Bye
Gaetan
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