Procedure: Service
Title: Replacing the Beam Blocker Assembly
Procedure number: DXR-007
Revision: 01
DXR
Part number:
Part description:
Functional description: DXR beam blocker assembly
Problems associated with this assembly: bad or sticky solenoids
Tools required: English Allen wrenches
Estimated time required: 2 hours
Notes: The beamblocker solenoids are very reliable and unlikely to fail. They
need 12 volts to activate. If one (or both) of the solenoids does not activate and
pull out of the beam it is more likely that one of the interlock switches
(microscope stage covers, grating door, filter block, UPS or 180 accessory
cover interlock…) is defective or needs adjustment. A bad left or right flex circuit
could also be bad preventing proper operation of the beamblocker solenoids.
The motor control board could also be defective
This document contains confidential or proprietary information of Thermo Fisher Scientific. Neither this
document nor the information therein is to be reproduced, distributed, used or disclosed, either in whole or
in part, except as specifically authorized by Thermo Fisher Scientific.
7/22/2009
Page 1 of 5
DXR-007 Replacing the Beam Blocker Assembly
Revision 01
Introduction
The beam blocker assembly is made up of two solenoids with flags attached.
Each solenoid is controlled by a magnetic reed switch in the microscope stage
cover. When the stage covers are opened there is no power on the solenoids
and they drop into the beam. This prevents laser radiation getting near the
operator.
1.
Power down the instrument.
Press and hold down the blue power button for 4 seconds until the LEDs
go out. Then unplug the AC power cord to the external brick power supply.
2.
Remove the middle and right cover screws
Remove the filter assembly. Use a Phillips screwdriver and remove the two
screws at the top rear of the middle cover. Then remove the two screws for
the right side cover. Remove the laser sled and remove the screw on the
side of the cover.
This document contains confidential or proprietary information of Thermo Fisher Scientific. Neither this
document nor the information therein is to be reproduced, distributed, used or disclosed, either in whole or
in part, except as specifically authorized by Thermo Fisher Scientific.
7/22/2009
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DXR-007 Replacing the Beam Blocker Assembly
3.
Revision 01
Remove the center and right side covers.
Lift the covers straight up to remove.
4.
Remove the microscope stage covers.
Use a 7/64"Allen wrench and remove the four screws at the bottom of the
microscope covers.
5.
Disconnect the solenoid cable from the flex cable harness.
Very carefully squeeze the black tab in the middle of the connector coming
from the solenoids. Then gently disconnect the black connector. Be careful
with the flex cable harness!
This document contains confidential or proprietary information of Thermo Fisher Scientific. Neither this
document nor the information therein is to be reproduced, distributed, used or disclosed, either in whole or
in part, except as specifically authorized by Thermo Fisher Scientific.
7/22/2009
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DXR-007 Replacing the Beam Blocker Assembly
6.
Revision 01
Unscrew the beam blocker assembly from the casting.
Use a 9/64" Allen wrench and remove the assembly.
7.
Install new beam blocker assembly.
Plug the cable into the flex harness and then secure the assembly to the
casting with the two screws.
8.
Replace the middle and right side covers.
Replace the middle and right side covers and secure with the five screws.
This document contains confidential or proprietary information of Thermo Fisher Scientific. Neither this
document nor the information therein is to be reproduced, distributed, used or disclosed, either in whole or
in part, except as specifically authorized by Thermo Fisher Scientific.
7/22/2009
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DXR-007 Replacing the Beam Blocker Assembly
9.
Revision 01
Install the filter and grating and then power up the instrument.
Install the filter and grating to match the installed laser. Then power up the
spectrometer.
10. Install the customer align tool on the microscope stage.
Then go to the Alignment tab of Experiment Setup and focus on the
pinhole. If you have the SmartRaman, remove the tool holder and install the
plate with the customer alignment tool.
11. Calibrate the instrument.
Close Experiment Setup and then select Calibrate Instrument from the
Collect menu. All three calibrations must pass. If not, contact Technical
Support.
12. Run performance tests.
Run the performance tests. The system must pass the polystyrene signal to
noise specification and wavelength accuracy. (see DXR-001 for detailed
information on running the performance tests).
13. Install the other lasers and high resolution gratings (if available)
Install the other lasers (along with their grating and filter) and high resolution
gratings. Then repeat steps 10-12.
14. Make a copy of the data for future use
Copy the vrmcal folder, the performance test results folder and the
dxreeprom.dat file for your records. This information will be very useful for
future troubleshooting.
This document contains confidential or proprietary information of Thermo Fisher Scientific. Neither this
document nor the information therein is to be reproduced, distributed, used or disclosed, either in whole or
in part, except as specifically authorized by Thermo Fisher Scientific.
7/22/2009
5