Thermo Scientific 49i, Instruction Manual, Page: 209 / 314

Servicing
Optical Bench Replacement
Thermo Fisher Scientific Model 49
i
Instruction Manual 7-25
Screwdriver, flatblade
Use the following procedure to replace the optical bench.
1. Turn instrument OFF, unplug the power cord, and remove the cover.
2. Disconnect the plumbing and electrical connections.
3. Remove the two screws from the photometer lamp access hole cover on
the rear panel and remove the cover.
4. Loosen the captive screws (4) securing the optical bench to the floor
plate ( Figure 7-11 ) and remove the bench by first moving the
photometer slightly towards the rear through the lamp access hole and
then lifting up and towards the front.
Figure 7-11. Replacing the Optical Bench
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.
Photometer Lamp
Lamp Heater
Access Port Cell B IN
Absorption Cell B
Access Port Cell B OUT
Detector B
Access Port Cell A IN
Input Block
Absorption Cell A
Access Port Cell A OUT
Output Block
Detector A
Captive Screws (4)