Servicing
Digital Output Board Replacement
7-42 Model 42i Low Source Instruction Manual Thermo Electron Corporation
Digital Output Board
Replacement
Use the following procedure to replace the digital output board
(Figure 7-20).
Equipment Required:
Digital output board
Nut driver, 3/16-inch
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. 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 7-21).
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.
Motherboard
Replacement
Use the following procedure to replace the motherboard (Figure 7-20).
Equipment Required:
Motherboard
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.
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