Thermo Scientific 49i, Instruction Manual, Page: 213 / 314

Servicing
Photometer Board Replacement
Thermo Fisher Scientific Model 49
i
Instruction Manual 7-29
1. From the Main Menu, press to scroll to Service > press >
to scroll to Lamp Setting > and press .
The Bench Lamp Setting screen appears.
Note If Service is not displayed, refer to “ “Accessing the Service Mode” on
page 7-4 , then return to the beginning of this step.
2. At the Bench Lamp Setting screen, use to
increment/decrement the Lamp Setting % until Cell A Int and Cell B
Int indicate approximately 100,000 Hz.
3. Press to save the setting.
Photometer Board
Replacement
Use the following procedure to replace the photometer board ( Figure 7-9 ).
Equipment required:
Photometer board
Philips screwdriver
Use the following procedure to replace the photometer board.
1. Turn instrument OFF, unplug the power cord, and remove the cover.
2. Remove the cables from the board. Note the locations to facilitate
reconnection.
3. Remove the two screws from the top of the board.
4. Pop off the board from the bottom mounting studs and remove the
board.
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.