Specifications

FTB 312-4 Revision 4 – 1-8-2008 27
Removal
1. Loosen the four screws holding PCB1
to the bracket and lift PCB1 up and
out.
2. Loosen the two truss-head screws
below PCB1 on the left side of the
bracket that hold the bracket to the
base plate.
3. Remove the screw on the left front side
of the bracket that fastens the bracket
to the Input Power Module.
4. Loosen the two truss-head screws in
the base plate on the right side of the
bracket that hold the bracket to the
base plate.
5. Slide the bracket up off the screws. Be
careful of the cable and cable
connectors. You may hang the bracket
over the edge of the connector panel to
perform the remaining steps.
Replacement
1. Reverse the removal procedure.
HV Rectifier Board (PCB2)
The HV rectifier board is mounted on the
right of the Component Bracket.
Removal
1. Remove the Component Bracket to
gain access to PCB2.
2. Loosen, but do not remove, the screws
holding PCB2 to the terminal block
TB3.
3. Slide the circuit board out from under
the terminal block screws.
Replacement
1. Reverse the removal procedure.
2. Restore the wire routing to its original
state.
Mode Relay (K2), Discharge Relay
(K3)
Remove the Component Bracket for
adequate access to Relay K2.
Removal
1. Remove the capacitors.
2. Remove PCB1.
3. Remove the Component Bracket.
4. Loosen the screws that fasten the
wiring connectors to the relay.
5. Carefully disconnect the wires from
the terminals of the component and
note their locations so that you may
more easily replace them.
6. Remove the screws that hold the
component to the base plate.
7. Remove the component
Replacement
1. Reverse the removal procedure.
2. Verify that wiring agrees with Figure
2-7 and restore the wire routing to its
original state.
Flashhead Components
Flashtube (FT101)
Use the following removal and
replacement procedures:
Removal
1. Using a #2 flat-blade screwdriver,
loosen the three screws (on screw
lugs)—this enables you to disengage
the flashtube.
2. Carefully lift the flashtube upward
from the assembly.