Thermo Scientific 49i Instruction Manual page 209

Access Port Cell A IN
Thermo Fisher Scientific
Screwdriver, flatblade
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.
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
photometer slightly towards the rear through the lamp access hole and
then lifting up and towards the front.
Lamp Heater
Photometer Lamp
Input Block
Captive Screws (4)
Absorption Cell A
Figure 7-11. Replacing the Optical Bench
7-11) and remove the bench by first moving the
Access Port Cell B IN
Absorption Cell B
Access Port Cell A OUT
Output Block
Optical Bench Replacement
Access Port Cell B OUT
Detector A
Model 49i Instruction Manual
Servicing
Detector B
7-25