Thermo 49i - Sample;Reference Solenoid Replacement

Servicing
Sample/Reference Solenoid Replacement
Thermo Fisher Scientific Model 49i Primary Standard Instruction Manual 6-29
Note If Service is not displayed, refer to ““Accessing the Service Mode” on
page 6-4, 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.
Sample/Reference
Solenoid
Replacement
Use the following procedure to replace a sample/reference solenoid valve.
Equipment required:
Solenoid
Flatblade screwdriver
Open-end wrench, 5/8-inch
1. Turn instrument OFF, unplug the power cord, and remove the cover.
2. Disconnect the Sample and Ref connection cables from the
measurement interface board.
3. Remove the plumbing from the solenoids.
4. Loosen the four captive screws and lift out the solenoids and the
solenoid plate.
5. Remove the solenoid retaining nuts from the underside of the solenoid
plate and remove the faulty solenoid.
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. 