Thermo Scientific 42i Instruction Manual page 223

Digital Output Board
Replacement
Motherboard
Replacement
Thermo Fisher Scientific
Use the following procedure to replace the digital output board
18).
Equipment Required:
Digital output board
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
Expansion Board (Optional)
3. Disconnect the digital output board ribbon cable from the
motherboard.
4. Using the nut driver, remove the two standoffs securing the board to
the rear panel (Figure
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.
Replacement" procedure in this chapter.
7–19).
Servicing
Digital Output Board Replacement
(Figure 7–
▲
"I/O
▲
Model 42i Instruction Manual 7-39