| Volume
Control Parts:
DPDT switch, the
two center pins are connected to ground. The yellow wire connects
to o-Sw which connects through R3-1k which is brighter than the
4K7 shown. The other side of the mute switch connects to the Mute
terminal for a wire from terminal T4 on the Phoenix board near
LED-1.
Power to the board
is connected to the top right green terminal to the Phoenix J3
terminal next to the J2 TRS jack.
Pot-4 on the
control board replaces Pot-4 on the Phoenix board. The center pin
is connected to ground. The yellow wire connect to the green
terminal so a wire can run from the Phoenix terminal in
place of Pot-4 on the Phoenix board. Move the yellow wire to the other side
of the Pot if you want Null adjustment to go in the opposite
direction.
Mount the IC socket
but the LM386 is not used on the volume control board.
The output from pin
3 of the 555 on the Phoenix can be take by drilling a small hole
below R22-2k2 in the copper trace, then solder in a wire. This
connects to the green terminal on the control board by
R4. R4-10k is new and when Pin3 is connected it bleeds
off the voltage across the C9-470uf on the Phoenix board. This
avoids an occasional latch up of the 555 that can occur.
The blue Pot is
used in place of the mod on the Phoenix board R32-2.2k. Adjust the
Pot for ideal shading. Connect LED-1 +
side on Phoenix board to Vol.S- green terminal.
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