Daniel, You need to start way before the speaker to make sure that the receiver and the audio amplifiers are working at all.
I always look at the volume squelch HI pin coming from the receiver. This is audio from the discriminator that is amplified. This is found on the systems board P104 on pin 11. It is marked volume squelch hi. It is very near the audio output transformer. I use a scope at this point and if your receiver is working then you will see random noise like what you would hear with an open squelch. If you have an audio amplifier then you could hook up the input to this point and you would hear an open squelch. The audio level is about 1 volt at this point. Try this and see if your receiver is working. If you have audio at this point the you need to check to see if it is getting to Pin 13 which is the audio input to the amplifier. It comes from the wiper of pot R3 on the systems board. This pot sets the audio level into the audio amplifier. This pot is near the large 400 uf filter capacitor and near the metering socket. You also want to make sure that power is getting to the audio output transistors. Pin 20 is A- or ground in a base station and pin 15 is A+ or 13.8 volts. Let me know what you found out. John Lloyd, K7JL Intermountain Intertie http://utahvhfs.org/snowlink.html 3. Service speaker not workinng Posted by: "Daniel M LePage" [EMAIL PROTECTED] dmlgnnv Date: Sun Dec 10, 2006 2:12 pm ((PST)) When I changed the shelf this reciever did have service speaker operated. The number stamped on the drawer is PL 19D4172G2G1 REV "Blank". I have been trying to find the right print on the web site but I can not find it. I have tested the speaker with an audio tone and it does work from pins 11 & 12 of J932 but I get no audio there. The audio from the system board on pins 952 16 and 17 look like large orange and red wires going to J 931. If any one can guide me to get this to work please do so. I am still trying to get the receiver sens problem resolved but need to be able to hear the repeater locally when I am working on the receiver. 73's Dan WA1OOH ____________________________________________________________________________________ Any questions? Get answers on any topic at www.Answers.yahoo.com. Try it now.
