Correcting Battery-Backed RAM Malfunctions
Troubleshooting
Force FX-8C Service Manual 6-25
Important
Correcting Battery-Backed RAM Malfunctions
Equipment required:
• Phillips screwdriver
• Surface mount, quad pack chip extractor.
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.
3. Remove the Control board.
a. Unlock the connector on the Control board and disconnect the
display board ribbon cable from the Control board.
b. Carefully slide the Control board straight up through the slots in
the heat sinks to disconnect it from the Power Supply/RF board.
All data stored in internal memory
(refer to Section 3, Internal
Memory) is lost when the battery is
removed.
4.
Replace the battery.
a. Grasp the battery and slide it up and out of the socket.
b. Position the new 3 V button-cell battery above the socket so that the
positive side of the battery is facing out (visible).
c. Slide the new battery down into the socket.
Warning
Electric Shock Hazard To allow stored energy to dissipate after power is
disconnected, wait at least five minutes before replacing parts.
Electric Shock Hazard Do not touch any exposed wiring or conductive surfaces
while the generator is disassembled and energized. Never wear a grounding
strap when working on an energized generator.
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 battery. Calibration values are lost
when the battery is replaced. Refer to Calibrating the Generator in Section 5 for
instructions.
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