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F-52 F-52
TROUBLESHOOTING & REPAIR
MULTI-SOURCE
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FIRING BOARD REPLACEMENT PROCEDURE (Procedure)
J1
J2
J3
J5
J6
J8
Firing Board
Control Board
J4
J7
REMOVAL PROCEDURE
1. Disconnect input power to the machine.
2. Using a 3/8” nut driver, remove screws and
lower the front control panel to access the
firing board on the left side of control box
while facing the machine. See Figure F.24.
3. Disconnect plugs J5, J8, and J4 from the
firing board.
4. Remove the four phillips head screws and
associated washers from the corners of
the firing board. See Figure F.25.
5. Carefully remove the firing board.
REPLACEMENT PROCEDURE
1. Replace the firing board.
2. Mount the firing board to the machine in its
proper position using the four phillips head
screws and associated washers previously
removed.
3. Reconnect plugs J4, J8, and J5 to the fir-
ing board.
NOTE: Be sure plug J7 is installed in the new
board.
4. Replace the four screws previously
removed from the front access panel.
FIGURE F.24. FRONT PANEL W/OUT COVER
Firing Board
MOUNTING SCREWS
J5
J6
J8
J4
J7
FIGURE F.25. MOUNTING SCREW LOCATIONS