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Resistor Values
#1
Hi all, I'm trying to fix an extruder heater problem, and I think one of the resistors on the main board went bad. I think R217 on the bottom left corner of the board on the 1.0a. I have 12 volts going in and nothing coming out. I have no voltage going to the main board, so i assume that one of the resistors is bad. Any help would be greatly appreciated.
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#2
anyone, anyone? I just need the values, I can't fix the printer until I know what the values are.
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#3
What are the makings on the part? If they are burned off there should be some pictures of the board floating around here on the forum.

Kieth
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#4
below it say J4, I assume that this means that it is supposed to be a 0 ohm resistor, but I just wanted to double check. Thanks
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#5
I had the same problem. Thanks to this message board. I followed the fixed posted by Peter L. The fix is to use a correct wattage fuse to protect a 40W heater. The design uses a zero Ohm 1/4W resistor as a fuse. It blows and cause an open circuit. To repair this, I shorted the resistor and add an external inline fuse (4A for 12V, 48W). A much better approach than using a zero Ohm resistor when you dont know when it will blow (1/4W rating).
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