NORTHROP GRUMMAN Patara II Manual

SERVICE BULLETIN
Note No.
SVC-FSB-0050
Release Date
11/20/2017
Contact
[email protected]
© 2017 Cutting Edge Optronics, Inc. 1 SVC-FSB-0050 Iklwa II and Patara II
Shutter Assembly Repair Procedure
Iklwa II and Patara II Shutter Assembly Repair
Procedure
Purpose
This service bulletin describes the process for repairing a shutter assembly that binds
while attempting to open and close due to incorrect hardware or incorrect arm alignment.
Scope
This service bulletin applies to shutter assemblies in Iklwa II and Patara II lasers
manufactured prior to July 11, 2017.
Responsibilities
The NG CEO Technical Service Department is responsible for the content of this service
bulletin.
Safety Requirements
CAUTION. Ensure the laser is turned off and unplugged from the electrical source prior
to performing this operation.
Tools and Equipment
3/32" Hex Driver
5/64" Hex Driver
9/64" Hex Driver
3/16" Nut Driver
Diagonal Cutter
Gloves
Small Cable Tie
Procedure
1. Remove Laser Cover
1.1. Move the laser to a clean area.

SERVICE BULLETIN
Note No.
SVC-FSB-0050
Release Date
11/20/2017
Contact
[email protected]
© 2017 Cutting Edge Optronics, Inc. 2 SVC-FSB-0050 Iklwa II and Patara II
Shutter Assembly Repair Procedure
1.2. Wipe off the outside of the laser.
1.3. Put on powder free gloves.
1.4. Ensure power is turned off to the laser and unplug laser from power source.
1.5. Using a 3/32" hex driver, loosen the mounting hardware holding the laser cover to the
laser housing.
1.6. Remove the cover.
2. Determine Failure Mechanism and Repair
Shutter assemblies shipped in lasers prior to May 2017 may encounter interference between
screws protruding through the disk and the solenoid when the shutter is in the open position.
See Figures 1 and 2below.
Figure 1: Protruding Screw
Figure 2: Protruding Screw –Close Up
2.1. Ensure that none of the three mounting screw ends are visible between the solenoid
body and the thin disk, as seen in Figures 1 and 2 above.
Screw Head Protruding
Causing Shutter to Bind
Screw Head Protruding
Causing Shutter to Bind
Disk
Solenoid

SERVICE BULLETIN
Note No.
SVC-FSB-0050
Release Date
11/20/2017
Contact
[email protected]
© 2017 Cutting Edge Optronics, Inc. 3 SVC-FSB-0050 Iklwa II and Patara II
Shutter Assembly Repair Procedure
2.2. Using gloved hands, place a finger atop the shutter arm, rotating clockwise while
pushing the arm toward the solenoid as if trying to open the shutter. Feel for any
binding that may occur.
2.3. Inspect the hardware used to mount the arm to the solenoid. Verify that each of the
three mounting screws has both a lock and a flat washer. See Figure 3.
Figure 3: Inspect Mounting Hardware
2.4. If the screw ends are visible between the disk and the solenoid, if any binding is
observed when manually opening the shutter, or there is missing hardware on the
screws, cut the cable tie shown below and disconnect the 4-pin connector. Remove
the shutter assembly from the laser. Remove the three sets of mounting hardware
holding the arm into place. Ensure the screws are 1/4" long. Verify there is a lock and
flat washer on each screw and re-attach arm with the mounting hardware. Re-install
the shutter assembly back into the laser. Connect the 4-pin connector. Using a cable
tie, tie the wire to the bench.

SERVICE BULLETIN
Note No.
SVC-FSB-0050
Release Date
11/20/2017
Contact
[email protected]
© 2017 Cutting Edge Optronics, Inc. 4 SVC-FSB-0050 Iklwa II and Patara II
Shutter Assembly Repair Procedure
Figure 4: Inspect Mounting Hardware
2.5. Shutter assemblies shipped in lasers prior to July 2017 may encounter interference
between the bottom of the arm and the laser bench. See Figures 5-7 below.
Figure 5: Area of Detail
Area of Detail

SERVICE BULLETIN
Note No.
SVC-FSB-0050
Release Date
11/20/2017
Contact
[email protected]
© 2017 Cutting Edge Optronics, Inc. 5 SVC-FSB-0050 Iklwa II and Patara II
Shutter Assembly Repair Procedure
Figure 6: No Gap Causing Interference
Figure 7: Has Gap –No Interference
2.6. There are a couple of options to repair this.
a. Remove the shutter assembly from the laser.
b. Using a 3/16" nut driver, loosen the nuts holding the solenoid to the mount.
These nuts are located on the back side of the mount. If possible, slide the
solenoid up in the mount and tighten the nuts. Test to see if the bottom of the
arm is still binding to the bench.
Figure 8: Rear of Shutter Assembly
GOOD: Sufficient gap;
will not contact or
bind on bench
BAD: No gap and
potential to contact and
bind on bench

SERVICE BULLETIN
Note No.
SVC-FSB-0050
Release Date
11/20/2017
Contact
[email protected]
© 2017 Cutting Edge Optronics, Inc. 6 SVC-FSB-0050 Iklwa II and Patara II
Shutter Assembly Repair Procedure
c. Remove the hardware holding the arm in place. File or grind material off of
the bottom and corner of the arm. Reattach arm to solenoid with proper
hardware.
d. Reinstall the shutter assembly back into the laser. Connect the 4-pin
connector. Using a cable tie, secure the wire to the bench. Test to see if the
bottom of the arm is still binding to the bench.
Figure 9: Remove Shutter Arm and File or Grind Bottom Edge and Corner
3. Inspect Laser and Replace Cover
3.1. Once there is no binding with the shutter, clean the inside of the laser of any debris.
3.2. Replace the cover and tighten all of the mounting hardware.
3.3. Return the laser to normal operation.
File or grind
these edges