Both Resistor - colours green.blue.brown, 560 ohm if I'm not mistaken.
KiwiJor September 2009 |
I have pulled them out and they are too discoloured to see the band colours.
Cheers for your reply. Like I said the machine is pretty old and I would like to try the resistors before I scrap the machine.
gibbert September 2009 |
Gibbert, sorry to tell you this but...
If a resistor burns up it's usually a symptom of some other component having failed and consequently making the resistor pass too much current for its Wattage rating - i.e. it gets too hot because of a fault somewhere else in the circuit. Changing the two resistors will probably not fix the problem - any new resistors would likely burn up too. Resistors seldom burn up spontaneously on their own - sometimes the designer / manufacturer puts in a cheaper lower wattage resistor than called for and it slowly burns and discolors on the outside and it gently cooks - You can often "lift" these from the PCB and see the bands underneath
Resistors are nearly always marked with color bands indicating their value 0-9 = Black Brown Red Orange Yellow Green Blue Violet Grey White
First band = first value
Second band = second digit
Third band = Multiplier (number of Zeros)
Fourth band = tolerance %
http://en.wikipedia.org/wiki/Resistor#Four-band_resistors
Brown Black Orange = 10,000 Ohms 10K
Good luck...
Peccavi September 2009 |