Re: Schematics for kustom Lead Amp top?
Looks like I got the right plans, for some "pc506..." board.
Now it's about + 0.7 V DC out, for the speaker out port.
He says it's ok, But it varies, and he can't figure out why.
When he cools the two "Differential steps", (called Q1 and Q2: "2122" or 4249?) one gets to plus + 2-3V, the other to minus - 2-3V.
It's some kind of balancing coupling.
The repairman cant figure out if it should be a difference on the two steps like that.
, if he should keep looking for a fault or stop there, since what should happen in the amp, with it's values etc, is not clear.
If someone knew?
He gets a 25V + DC at times
It's a -71-78 make amplifier module