Electronics > Repair
Dishwasher power board
Zero999:
--- Quote from: AndyPen1981 on December 30, 2024, 07:30:33 am ---Thats great 👍
I looked at the data sheet for the LNK304 it mentions the LNK306 (which I have) on the same data sheet, could I use this instead? If not I will send for some 304s or a repair kit
Thanks
--- End quote ---
According to the data sheet. The LNK306 is a more powerful version of the LNK304, but read the entire document to be sure. If so, then replacing the LNK304 with the LNK306 is an upgrade and will make it more reliable. Check all the capacitors and surrounding semiconductors and replace them if necessary, before replacing the IC.
https://www.power.com/sites/default/files/documents/linkswitch-tn_family_datasheet.pdf
wraper:
LNK306 will work, however it has 2x current limit. Which means inductor may be too small and saturate if output overload happens.
AndyPen1981:
Upon further testing I found that the ATMEGA chip on the otherside of the board had a internal short between vcc and ground, so its a gonner.
I've found a board on ebay and bought that, hopefully that will sort it.
Thanks for all the help, much appreciated 👍
schmitt trigger:
I am glad that you have solved your problem.
A relative works for an appliance repair center. Although the defective boards are not repaired and replaced with a new one, the manufacturer does require a detailed post-mortem analysis to establish the failure mechanism on selected boards.
Those PowerIntegrations devices do fail on a regular basis. This is a known failure mechanism, and several engineering changes have been implemented, like beefier MOVs. However, failures continue to occur.
I would love to see a FA report from PowerIntegrations, but that is proprietary information. I would not be surprised though, to see EOS listed as the failure mechanism.
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