Thermo Scientific 5028i Instruction Manual page 209

Motherboard
Replacement
Measurement
Interface Board
Replacement
Thermo Fisher Scientific
Use the following procedure to replace the motherboard
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 grounded antistatic wrist
strap must be worn while handling any internal component.
1. Turn the instrument OFF, unplug the power cord, and remove the
cover.
2. Remove the I/O expansion board (optional), if used. See the
O Expansion Board (Optional)
chapter.
3. Remove the digital output board. See the
Replacement" procedure in this chapter.
4. Unplug all connectors from the motherboard. Note connector
locations to facilitate re-connection.
5. Using the nut driver, remove the six standoffs securing the board to
the rear panel (Figure
6. Pop the motherboard off of the support bracket, and remove the
motherboard.
7. To install the motherboard, follow the previous steps in reverse.
8. Calibrate the analog voltage outputs as defined earlier in this chapter
(all ranges).
Use the following procedure to replace the measurement interface board
(Figure 7–13).
Equipment Required:
Measurement interface board
Philips screwdriver
Equipment Damage Some internal components can be damaged by
small amounts of static electricity. A properly grounded antistatic wrist
strap must be worn while handling any internal component.
1. Lower the partition panel, then proceed to the next step below.
Refer to "Removing the Measurement Case Assembly and Rear
Panel" in this chapter.
Replacement" procedure in this
"Digital Output Board
7–12).
Model 5028i Instruction Manual
Servicing
Motherboard Replacement
(Figure 7–11).
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7-25