I don't have this diagram. The one I have labeled 550S is a different board. If no one else has it here, you'll need to get a copy from Rockford and email it to me.
babin_perry@yahoo.com
babin_perry@yahoo.com
You need to check those transistors with the meter on diode-check and no power applied.
If you don't know how to test them, use the applet linked from the following page.
Basic Amplifier Repair - Transistor Test Applet Link
If you don't know how to test them, use the applet linked from the following page.
Basic Amplifier Repair - Transistor Test Applet Link
I'm looking at some of my options (on my phone at the moment) and notice one has a much higher power dissipation rating. Should this be a viable choice?
MMBT3904LT3G ON Semiconductor | Mouser
MMBT3904LT3G ON Semiconductor | Mouser
Anything is possible. I haven't had much time for thorough testing. I may need to pick up a magnifier to look over some of the delicate solder points. They look great to the nekkid eye but I also realize that type of soldering shouldn't be done after consuming nearly a pot of coffee ...
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