bassman wrote:I have a MM Sterling SUB bass and the active electronics stopped working suddenly . I was checking over the bass and I think that I may have inserted the 9V battery in reverse polarity.
Would that fry the electronics?
I can't say for sure, but I'd guess not. Most circuits have some sort of protection for that possibility, such as a diode.
I have tried to check the connections inside the bass and everything looks OK.
The IC chip is directly soldered to the circuit board. It has no socket like on a G&L.
Anybody have any ideas?
A couple of common places to look:
1. Make sure that the metal contacts in the battery box are actually making contact with the battery. You can usually bend them out, toward the battery.
2. Check that the battery lead wires are connected in the battery box. They're pretty fine gauge and are known to break. You might also check their connections to the preamp board.
3. If the chip itself is actually toast, you can proceed a couple-three ways: Contact EBMM customer service and arrange to ship the bass to them for repair, repair it yourself, or have a local tech do it.
If you're handy with a soldering iron, you can de-solder the chip and solder a socket in its place. Then just drop in a replacement chip. They're a common part and the same as G&L uses.
Ken...