KennyOnTap
New Member
Hey all,
First time here on the forum.
Ok I have done a couple of mainboard repairs in the past on an old camcorder and on a micker line machine used for checks. I fixed a nintendo before also but this is the first thing that I am working on that there is no obvious damage. I think I have found a blown resistor but I am not entirely sure as I can not find any schematics for this particular motherboard.
I measured the resistance at 1.8 ~ 1.9 Ω (which seems high).
It looks like the cover has blown off the resistor. My electrician friend said wire a potentiometer in and play with the resistance value to see if I can get the machine to work.
Which brings me to the initial problem. The machine powers on, the carriage immediately moves all the way to one side (as it should) but then bumps into the wall and displays "motor error" on the LCD display. There is a photosensor (mounted on the carriage) that is supposed to pick up on the 'end of track tab' and tell the motor (IC for stepper) to stop moving. The ribbon cable in the picture goes directly to the carriage for all of the controls on it. (photosensor x 2 and solenoid). I am thinking that the resistor is supposed to bring the voltage signal to within parameters for the IC and I am assuming that is not happening or the high resistance is jacking with the signal.
Any ideas? I am not even sure this is a resistor. No labeling on it and it looks deformed even under a magnifying glass. Haven't seen this before. Comments Please!
First time here on the forum.
Ok I have done a couple of mainboard repairs in the past on an old camcorder and on a micker line machine used for checks. I fixed a nintendo before also but this is the first thing that I am working on that there is no obvious damage. I think I have found a blown resistor but I am not entirely sure as I can not find any schematics for this particular motherboard.
I measured the resistance at 1.8 ~ 1.9 Ω (which seems high).
It looks like the cover has blown off the resistor. My electrician friend said wire a potentiometer in and play with the resistance value to see if I can get the machine to work.
Which brings me to the initial problem. The machine powers on, the carriage immediately moves all the way to one side (as it should) but then bumps into the wall and displays "motor error" on the LCD display. There is a photosensor (mounted on the carriage) that is supposed to pick up on the 'end of track tab' and tell the motor (IC for stepper) to stop moving. The ribbon cable in the picture goes directly to the carriage for all of the controls on it. (photosensor x 2 and solenoid). I am thinking that the resistor is supposed to bring the voltage signal to within parameters for the IC and I am assuming that is not happening or the high resistance is jacking with the signal.
Any ideas? I am not even sure this is a resistor. No labeling on it and it looks deformed even under a magnifying glass. Haven't seen this before. Comments Please!
