Post by mastertech on Dec 18, 2013 13:19:01 GMT -5
Figures. Then you are going to have to use 22 for ground for these test. Try to get a good ground connection there where you dont have to hold the probe, even if you have to solder a wire to the board on that trace and clip it to your test probe. I say this because to will need steady hands for these next tests and a slipping probe will not help.
I am attaching a picture with 2 SM transistors circled in red, TR111 and TR112. They are on the back side of that CPU board but I think they are near the top and should be easy to get to.
With your DMM on DC voltage and the unit plugged in, I want you to test for voltage on each leg and tell me what you get, even if it is zero. So you should have 6 results. Make sure you indicate which transistor has which voltages when you post back. I'm going out for an hour so I will check back. I'm sure this will take a little time anyways. And be careful not to slip a probe. These are situations where I file my probe tips to a very sharp point so they stick in and don't slip.
I am attaching a picture with 2 SM transistors circled in red, TR111 and TR112. They are on the back side of that CPU board but I think they are near the top and should be easy to get to.
With your DMM on DC voltage and the unit plugged in, I want you to test for voltage on each leg and tell me what you get, even if it is zero. So you should have 6 results. Make sure you indicate which transistor has which voltages when you post back. I'm going out for an hour so I will check back. I'm sure this will take a little time anyways. And be careful not to slip a probe. These are situations where I file my probe tips to a very sharp point so they stick in and don't slip.
