Valleylab Force FX-8C, Service Manual

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Left Rear Heat Sink and Component Replacement
7-18 Force FX-8C Service Manual
If you plan to replace one or more components on the existing heat sink,
go to Step 2 – Replace Left Rear Heat Sink Components.
or
If you plan to replace the entire left rear heat sink assembly, go to
Step 3 – Install the Left Rear Heat Sink.
Step 2 – Replace Left Rear Heat Sink Components
Figure 7-4.
Components of the left rear heat sink
• To replace the HVPS (high voltage power supply) primary damping
resistor, remove the screw and shoulder washer that secure it to the
heat sink. Position the new resistor on the heat sink and reinstall the
washer and screw.
• To replace one or more of the four HVPS FETs, remove the screw and
shoulder washer that secure the FET to the heat sink. Position the new
FET on the heat sink and reinstall the washer and screw.
• To replace the bridge rectifier, note the orientation of the four wires.
Mark them for reinstallation. Then, detach them from the rectifier.
Remove the screw that secures the rectifier to the heat sink. Position
the new bridge rectifier on the heat sink and reinstall the screw.
Connect the four wires to the appropriate terminal on the rectifier.
RED
BLACK BLUE
BROWN
7 5 3 1
Bridge Rectifier
HVPS FETs (4)
HVPS Primary Damping Resistor