Valleylab Force FX-8C, Service Manual

Page: 177 / 218

Low Voltage Power Supply Replacement
Replacement Procedures
Force FX-8C Service Manual 7-23
Low Voltage Power Supply Replacement
Equipment required:
• Phillips screwdriver.
Step 1 – Remove the Low Voltage Power Supply
A. Turn off the generator. Disconnect the power cord from the wall
receptacle.
B. 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.
C. Remove the three screws (one plastic and two metal) that secure the
support bracket to the heat sinks. Save the screws and bracket for
reinstallation.
D. Disconnect and remove the low voltage power supply.
(1) Disconnect the Power Supply/RF board cables from the low
voltage power supply (red spade lug and 3-pin connector at the
rear; 6-pin connector at the front). Mark the cables for reinstallation.
(2) Remove the four screws that secure the low voltage power supply
to the Power Supply/RF board. Save them for reinstallation.
(3) Lift the low voltage power supply off the Power Supply/RF board.
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.