Stewart MacDonald bomb boost, Assembly Instructions Manual, Page: 6 / 10

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©2017 Stewart-MacDonald page 6 of 10
JHS Pedals Kit
For Stew Mac
DC Jack
Mini Bomb
C1
C2
Q1
VOLUME
InJ
D8
S
T S
T
R4
R3
R1
R2
D1
OutJ
P78869
.1J63
Footswitch
Ribbon cable
B1M
Step 5: Install the volume pot
Step 6: Install the footswitch, then the ribbon cable
The last component to go onto the circuit board is the
volume pot
. It installs
on the back of the board. The pot has three connecting lugs; the illustration
in Step 6 shows the pot in position on the board.
The pot has an index pin protruding from the case. Break off this pin before
installation, so the pot will mount flush against the pedal case. Needle nose
pliers work well for removing the pin.
Use the
adhesive foam tape
to insulate the back of the pot from the sol-
dered leads of the other parts. Solder the pot in place, making sure it sits flat
on the back of the board.
Install the
footswitch
on the back of the circuit board. The switch lugs will
fit in only one of two directions; either orientation works fine. Insert the lugs
through the nine eyelets so the switch sits flush, making contact all around.
Solder one lug and let it cool. This holds the switch in place while you solder
the remaining lugs.
Next, install the ribbon cable . Insert the cable leads through the front of the
board, and solder them in place on the back.
Volume pot (1 MΩ, linear taper)
Adhesive foam tape
(Goes on back of volume pot)
Break off this index pin.