Optical Bench Replacement - Thermo Scientific 43i Instruction Manual

Optical Bench
Replacement
Thermo Fisher Scientific
Use the following procedure to replace the optical bench (Figure 7–6).
Equipment Required:
Allen wrench, 5/32-inch
Philips screwdriver
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. Disconnect the electrical cables from the optical bench:
a. Flash intensity assembly cable from the FLASH INT connector on
the measurement interface board
b. Heater cable from AC BENCH connector on the measurement
interface board
c. PMT BNC cable from the input board connector
d. PMT power cable from the HVPS
e. LED cable from the LED connector on the measurement interface
board
f. Flasher assembly from the FLASH TRIG connector on the
measurement interface board
g. Green ground wire from the floor plate
3. Disconnect the optical bench plumbing.
4. Using a 5/32-inch Allen wrench, remove the four optical bench
retaining screws, and lift the optical bench off the floor plate.
5. Replace the optical bench by following the previous steps in reverse
order.
6. Calibrate the instrument. Refer to the "Calibration" chapter in this
manual.
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Model 43i Trace Level-Enhanced Instruction Manual
Servicing

Optical Bench Replacement

7-11