Hi all,
I've run into a little problem while replacing a potentiometer in my preamp. While I was testing the unit I manged to short the power contacts by allowing the metallic underside of part of the board to rest on them. I wasn't quick enough to stop the resistor smoldering beyond recognition. I have found a schematic for the preamp and thought I could find the value of the resistor by determining the values of all other resistors and striking them off. It seems, though, unless my calculations are incorrect, that the schematic doesn't match up correctly with the circuit board. For example, I count four 2.2 ohm resistors and can only find three on the schematic. I was wondering if anyone here could help me to identify by other means the value of the offending resistor. I have a photo of the board, and the schematic. If I need to provide a photo of the underside of the board too I can do that. I don't know a great deal about circuitry to allow me to work this out myself. I'd greatly appreciate any help.
Cheers,
Harry
I've run into a little problem while replacing a potentiometer in my preamp. While I was testing the unit I manged to short the power contacts by allowing the metallic underside of part of the board to rest on them. I wasn't quick enough to stop the resistor smoldering beyond recognition. I have found a schematic for the preamp and thought I could find the value of the resistor by determining the values of all other resistors and striking them off. It seems, though, unless my calculations are incorrect, that the schematic doesn't match up correctly with the circuit board. For example, I count four 2.2 ohm resistors and can only find three on the schematic. I was wondering if anyone here could help me to identify by other means the value of the offending resistor. I have a photo of the board, and the schematic. If I need to provide a photo of the underside of the board too I can do that. I don't know a great deal about circuitry to allow me to work this out myself. I'd greatly appreciate any help.
Cheers,
Harry