Valleylab Force FX-8C, Service Manual

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Control Board Replacement
7-4 Force FX-8C Service Manual
Control Board Replacement
Equipment required:
• Phillips screwdriver.
1. Turn off the generator. Disconnect the power cord from the wall
receptacle.
2. Remove the five screws that secure the cover to the chassis. Lift the
cover off the chassis. Set the cover and screws aside for reinstallation.
3. Unlock the connector on the Control board and disconnect the display
board ribbon cable from the Control board.
4. Carefully slide the Control board straight up through the slots on the
heat sinks to disconnect it from the Power Supply/RF board.
5. Verify that the packaging for the new Control board contains the part
number for the Force FX-8C Control board. Do not install any other
Control board.
6. Install the battery in the battery socket (positive side facing up).
7. Position the new Control board over the Power Supply/RF board with
the Control board components facing the rear panel. Fit the edges of
the board into the slots on the heat sinks. Slide the board down,
carefully fitting the edge connector into the matching connector on the
Power Supply/RF board.
8. Connect the display board ribbon cable to the Control board and lock
the connector.
9. Position the cover above the chassis and slide it down. Install the five
screws that secure the cover to the chassis.
Warning
Electric Shock Hazard
To allow stored energy to dissipate after power is
disconnected, wait at least five minutes before replacing parts.
Caution
The generator contains electrostatic-sensitive components. When repairing the
generator, work at a static-control workstation. Wear a grounding strap when
handling electrostatic-sensitive components, except when working on an
energized generator. Handle circuit boards by their nonconductive edges. Use an
antistatic container for transport of electrostatic-sensitive components and circuit
boards.
Notice
Calibrate the generator after you install a new Control board. Otherwise, the
default calibration values are used. Refer to Calibrating the Generator in
Section 5 for instructions.