Transistor Troubles?

[CanAmUWHGear]

After scouring the forums about information as to why my BP series one has issues with the y axis and z axis, I have come to a few conclusions....
1. I have issues with the transistors
2. I cannot find any information as to how to test/verify the transistors on these boards.

Can someone help me with a procedure to test the transistors to see which ones are bad/faulty? Pictures and explanation will help me very much. I do have a good multimeter and can use it. Here's what I have...

BP series one with boss 5, converted to hillybilly board and mach 3 control.

X axis works great, Y axis makes noise but doesn't turn much, just wiggles back and forth and Z axis is dead.

THanks for your help!

Steveo

[Johann ohnesorg]

WTH is a hillbilly board? Show us a pic! Concerning transistors, they are the last things that will fail on a board.
Check your connectors, resolder every solder joint and check for blown/leaky caps.

[machintek]

Usually the 2N6547 will short between the emitter and collector (the two big wires). I put my meter on diode check to see the voltage drop across the semi-conductor junction. The odd ball one of the four is probably the one that is bad (zero voltage drop as it is shorted). Do not know anything about a converted machine but check the fuses if an axis is not doing anything. I am assuming Z is at least free to move mechanically.

George

[tpmx57]

I run one of Derecks(Hillbilly) boards on a Series II with Mach III and blow a transistor once in awhile but usually just if I have to hit the E-stop.
Check them like George says then replace and keep going

[CanAmUWHGear]

Fuses looked good, transistors looked good...so I bought some stepper drives from machmotion.com. If anyone wants, I have all of the old cards/drive stuff for sale...cheap..send me a PM if your interested.

Steveo