6) Servicing
REFERENCE
12
As discussed before it is possible to remove the working “guts” from the microphone body in
one operation to replace a tube. Please follow the procedure below;
1. Turn the power supply off, disconnect it from the wall, and disconnect the 6 or 7-pin
cable from the microphone.
2. Using a Philips screwdriver, remove the two Philips screws on the microphone body that
hold it to the base of the microphone.
3. Gently pull the base of the microphone out from inside the body. The guts of the
microphone will come out as one assembly.
4. When you've pulled the insides all the way out (DO NOT touch the delicate capsule!)
5. Gently grasp the tube between your thumb and forefingers, and wiggle it out of the socket.
6. Taking care to align the pins properly, insert the new tube into the socket, and repeat
these steps (again, CAREFULLY) returning the guts to the inside of the microphone. Make
sure to properly tighten the screws at the base for a good chassis ground connection!
INTERNAL GROUND LIFT
This jumper is located on the rear PCB of the PSU. On
earlier models it is a wire link (as pictured) on later
models it is a removable jumper. If the circuit ground is
required to be separated from the chassis to stop hum
generated by an “earth loop”, this link can be cut or the
jumper simply removed.
VOLTAGE CHANGE
Type 1 PSU will have the correct voltage set for your
country. If you need to change the voltage it can be
done by setting the links on the PSU PCB as described
on the AC Selector chart next to the links. This
procedure will require a soldering iron. Type 2 PSU does
not require any changes for different mains input
voltages.
