look at the DC offset voltages at both channel outputs when protection is in either state (good or disconnected)
look at the DC offset voltages at both channel outputs when protection is in either state (good or disconnected)
am not understanding why all base voltages are high . i would have expected differences in bad channel . but looking at base voltages its not making sense . are you sure you looked at correct transistors and your meter is working properly ?Sorry for the delay. Here are the measurements on the other transistors:
Q27: E = 1.61V / C = 38.55V / B = 2.02V
Q28: E = 1.58V / C = 38.05V / B = 2.18V
For Q27 and Q28, all voltages are negative.
Q29: E = 1.61V / C = 38.44 / B = 2.2V
Q30: E = 1.59V C = 38.2V / B = 2.2V
For Q29 and Q30, all voltages are positive
WHAT ARE THE TRANSISTOR NUMBERS of the driver and it's specific output transistor. THIS IS CRITICAL and I would not have asked it if it wasn't.Look at all the transistors on the "hot" channel especially the heat sunk transistors and the output transistor.
See if any are not factory. Transistor markings, solder condition etc...
and ya know what:
WHAT ARE THE TRANSISTOR NUMBERS of the driver and it's specific output transistor. THIS IS CRITICAL and I would not have asked it if it wasn't.
...OK, here is the info on outputs and drivers:
Outputs: 4 Fairchild 2SC2525 KY(G) and 4 Fairchild 2SA1075 KY(G)...
whoops .sorry i missed that part .Pete - did you notice that the voltage measurements I called for are NOT ground referenced??.
Ok, I know how it is, not having time to dissect the instructions posted.whoops .sorry i missed that part .