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Servicing
Motherboard Replacement
Motherboard
Replacement
7-40
Model 43i Trace Level-Enhanced Instruction Manual
5. Pop off the digital output board from the mounting studs and remove
the board.
6. To install the digital output board, follow previous steps in reverse.
Use the following procedure to replace the motherboard (Figure 7–18).
Equipment Required:
Motherboard
Philips screwdriver
Nut driver, 3/16-inch
Equipment Damage Some internal components can be damaged by small
amounts of static electricity. A properly ground antistatic wrist strap must
be worn while handling any internal component.
1. Turn instrument OFF, unplug the power cord, and remove the cover.
2. Remove the I/O expansion board (optional), if used. See the "I/O
Expansion Board Replacement" procedure in this chapter.
3. Remove the digital output board. See the "Digital Output Board
Replacement" procedure in this chapter.
4. Unplug all connectors from the motherboard. Note connector locations
to facilitate reconnection.
5. Using the nut driver, remove the standoffs securing the board to the
rear panel (Figure 7–19).
6. Pop off the motherboard from motherboard support bracket, and
remove the motherboard.
7. To install the motherboard, follow previous steps in reverse.
8. Calibrate the analog voltage outputs. Refer to "Analog Output
Calibration" in this chapter.
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Thermo Fisher Scientific
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Troubleshooting
