I have a power controller board for a tire balancing machine that the capacitor failed causing a surge and destruction of a resistor. I need some help identifying what capacitor it can be replaced with. Also I want to replace the blown surface mount resistor with a standard resistor. The damaged one had a number of 200 on it. Does this mean I should be able to replace it with a 200 ohm resistor, or is there some other variables I need to consider? Attached are some images of the board and capacitor.**broken link removed****broken link removed**
hi,
The PCB looks like a full bridge, so I would say that the resistor is 200R, the four caps look the same and are marked 104 that's a 0.1uF at 630V working voltage.
Your main problem will be clearing the carbonised burn on the PCB, its most likely conductive.
I wasn't aware that carbon was conductive. Thanks for the info. This board is pretty simple and only has traces on the top and bottom layer. I will just probably cut out the burned pieces where they might connect and test for continuity. Should I be worried about the resistor wattage? Also any idea on what the P and J stand for in p104j? I plan to just replace the caps and install the new capacitor on this side.**broken link removed**
hi,
I would assume that the voltage rating of the old cap, marked as 630V is the DC rating, this would indicate a AC RMS rating of 310Vac, which is typical for a 230Vac mains supply.
I would use the type shown in this image.
You may have to lengthen the leads of the new cap in order to use the existing holes.
E
hi,
I would assume that the voltage rating of the old cap, marked as 630V is the DC rating, this would indicate a AC RMS rating of 310Vac, which is typical for a 230Vac mains supply.
I would use the type shown in this image.
You may have to lengthen the leads of the new cap in order to use the existing holes.
E
Thank you guys for your help I ordered the capacitors that ericgibbs suggested, and used a 20 ohm 1 watt resistor (I used some smd sizing chart I found online to come up with the wattage). In the process of verifying the resistors, I discovered that another one was dead . I replaced the 4 caps, the burned out resistor, and the second 20ohm resistor right next to it and everything works now. Just as an FYI for anyone that might search this thread in the future, this was a motor control board for a Coats 1050 solid state wheel balancing machine.