01-31-2015, 05:09 PM
Thanks Ron. I was afraid I might end up there. I don't anything about the mpx board or the IF strip except that the IF board has 4 metal can ICs (LM703L) they have 6 legs on each one. and the mpx board has a 14 pin. IC (mc1304)
I just started to take some transistor readings on the control amp unit. Although I had previously tested them.
When I went to check V/BC of Q1 with just (one) lead of the Dmm. touching the base, I got a loud hum at the speakers. I had nor yet touched the other lead to anything.
I'm going to go ahead and change the 4 transistors on the control board and see where I'm at.
NOT giving up!! and appreciate all the help I can get. Big thanks to morzh/Mike for his help.
I just started to take some transistor readings on the control amp unit. Although I had previously tested them.
When I went to check V/BC of Q1 with just (one) lead of the Dmm. touching the base, I got a loud hum at the speakers. I had nor yet touched the other lead to anything.
I'm going to go ahead and change the 4 transistors on the control board and see where I'm at.
NOT giving up!! and appreciate all the help I can get. Big thanks to morzh/Mike for his help.
