Actually, the meter doesn't operate at all. I have a dry signal, but the reverb does work as well.
I'll have to double check the values with the placement diagram, but I'm pretty sure I did it correctly since I replaced them one by one.
I very well may have disconnected or bridged something.
Do you happen to know if the jumper wire between the two resistors on the bottom of the echo board is between R50 and R35? I've attached some photos. I circled the resistors and then put a pencil mark where they're jumpered. I might have misplaced one end of it?.
I've checked all the inputs and they each do the same thing. The tape has the more brown side down.
I have an audio probe. Q8 on the power supply board just gives me the sound of the motor. On the echo board at TR8 I have a faint signal on the middle pin. I'm not hearing anything on the record head. Should I be getting a voltage at the erase head? It doesn't seem right, but there's continuity between 54 on the power supply board and ground. Which looks like it's coming from the pins on V21.
Darlington Pair wrote:If you crank the intensity all the way up does the meter move from self oscillation and you just aren't hearing it at the output?
I hate to say this, but grab the parts placement diagram and make sure you didn't accidentally put a wrong value cap on a transistor gain stage because it could seriously effect the gain. Hopefully there isn't something that didn't accidentally get disconnected or a solder bridge when you changed the caps, but we've all done it.
Also, just in case, did you check all of the inputs including the from PA? The Echo/Normal switch could be an issue. I also hate to say this, but make sure the magnetic side of the tape is facing the right way, I've seen them where someone got turned around while splicing and spliced the wrong side.
Do you have a scope or an audio probe? You're going to need one of either if we get to the finding where audio disappears.
Am I right in assuming that you have a dry signal? Maybe your problem is around Q7 or Q8. If you have a scope you can look for signal at the record head to see if your problem is pre or post tape.