The resistor on this waterpik blew. I changed it with the a similar spec 47ohm 2 watt yageo resistor but it still keeps blowing the resistor. Checking with the multimeter the motor, capacitor, diodes, and thermal fuse all checked normal. Will a higher ohm resistor work better? What ohm resistor will work better to repair this waterpik? This video is showing the repair with a 56 ohm resistor https://www.youtube.com/watch?v=_J7_rV7ui1Y
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take a wire off the motor then it wont burn .the copper on the board is already burning . -
your pump is stalled ir atleast gummed up
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Something strange is the blackened PCB trace only runs to the filter cap, not to the motor.
Don't these pumps get dead-headed and I'm not sure if a pressure relief valve is there or the resistor is supposed to limit pressure?
edit: oh this thing runs on mainsLast edited by redwire; 01-05-2025, 09:42 PM.Comment
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cross-posted, yeesh:
https://www.eevblog.com/forum/repair...this-waterpik/
https://www.eevblog.com/forum/beginn...e-should-i-use
https://www.electro-tech-online.com/...esistor.166190
https://forum.allaboutcircuits.com/t...sistor.201146/
also related thread here (it's got a TCO as well
https://www.badcaps.net/forum/troubl...-water-flosserComment
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Did not know you were on these other forums also. Is this a crime?cross-posted, yeesh:
https://www.eevblog.com/forum/repair...this-waterpik/
https://www.eevblog.com/forum/beginn...e-should-i-use
https://www.electro-tech-online.com/...esistor.166190
https://forum.allaboutcircuits.com/t...sistor.201146/
also related thread here (it's got a TCO as well
https://www.badcaps.net/forum/troubl...-water-flosserComment
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Your resistor question goes back 7 months ago.
What's the problem - many people have helped you and told what resistor to use, things to check for.
Yes it's a crime - you post more information, pics on other forums which makes it hard for us to help you here. Expecting many to help you for free on these forums, you already have your questions answered- why waste our time?
https://forum.digikey.com/t/need-hel...sistor/41781/2Comment
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How much do you charge? Im not forcing you to help out or to reply to my post, why derail my post?. Ive changed the resistor to the same specs of 47ohm 2w and the resistor still blows. The video i linked showed using a 56ohm resistor instead to help with any extra resistance from any wear on the device but I wanted to know what the people of this forum would suggest instead before buying what i need from digikey.Comment
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Stop blaming the resistor - it is not the problem. They don't burn up unless they are overloaded. This one has a safety aspect- it must be a fusible type so this does not burn down the house.
It (high current draw) could be a problem with the motor, its brushes. Another site you posted on gave links to buy a new one for $10.
Or the pump mechanism needs lube or has dirt in it. Look for a mechanical problem. Buy a 24 pack of these resistors.Comment
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An update on this, i sold this waterpik for parts so its one less worry on trying to fix. Thank you all for the help.Comment
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Hi
I am trying to repair an ancient Dell 2209WA Monitor which suddenly shut off with a pop sound. On investigation found that one of the fusible resistors had blown. Further investigation identified multiple components as faulty because of which the fusible resistor blew. Please refer the attached circuit diagram showing the components that were found to be damaged.
1. FR950 - blown fusible resistor - 0.2 Ohm 1W
2. Q950 - shorted Q950 MOSFET - 650V 10A N Channel Mosfet
3. R835 - Blown Resistor - 20KOhm SMD resistor
4. D930 - Shorted Schottkey Diode... -
Hi to all forum members,
Got this faulty 350 watt atx psu dirt cheap from a local online seller as i am keen to use it as a learning tool to repair faulty power supply.
The faulty part is quite obvious from the burn area near the 16pin KA7500 BD pwm. The fuse is still intact with good continuity.
Upon power on ac, there is 5vdc standby power on cathode of diode D14 and about 10vdc on cathode of diode D13.(This should be the aux power to generate the 12v and 5v rail.)
Initially i replace the two burned resistors near my marked red arrow to 200 ohm resistor... -
I am curious if a 0402 resistor could go from 43 ohm to 0. In electronics class and my experience a resistor can degrade and gain resistance all the way up to not being able to conduct at all. I have never heard of a resistor decreasing in resistance and becoming 0 ohm or a dead short… that's not the direction they fail… or so I thought.
I was attempting to remove a wson8 chip on an iMac motherboard and it required a lot of heat, on one side of the chip were 3 0402 resistors that were very close. I popped the chip out unintentionally out of the tweezers and sent those resistors... -
So I picked up this little truck, and the blower motor does not work correctly. There are 4 settings, Low, Med-Low,Med-High, and Max. The issue is Low, Med-Low, and Med-High ALL act like Low. Max works like Max.
So research tells me it is the resistor block for the blower motor. So I change that. Still works the exact same. More research tells me the plug going into the Resistor block often gets corroded and faulty, so I change that. Still works the exact same. More research says sometime the switch in the cab goes faulty. I replace that. STILL WORKS THE SAME.
From... -
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