TM 9-6115-669-13&P
4.26 BRIGHTNESS CONTROL N7/R1 MAINTENANCE.
This task covers:
a.
Removal
b.
Test
c.
Installation
General Mechanic’s Tool Kit
(item 2, appendix B)
Automotive Fuel and Electrical System Repair, Tool
Kit (item 3, appendix B)
DC power supply, 24 VDC
Fork-Head screwdriver
(item 12, appendix B)
Reference
Shut down Generator Set
150 kW, paragraph 2.8.1.
Solder
(item 7, appendix E)
Two
The Generator Sets 150 kW produce lethal voltages.
Turn off power to the EPP III or Generator Set 150 kW before
performing any installation, removal, disassembly, or
assembly work.
Wear protective gloves when performing any work on main
assemblies of the EPP III.
CAUTION
Label all cables before removing electrical or electronic assemblies or
components.
a
Remove stanchion by PDU (1, figure 4-40).
b.
Open access door (2) and secure with prop (3).
c. Install stanchion.
d.
Open indicator panel cover (4).
BRIGHTNESS CONTROL
a.
Record labeling and position of cables, and remove cables from control board N7 (6).
b.
Pull tabs (8) located on rearside lower portion of heat sink (7), and pull heat sink (7) down out
of mounting bar.
c.
Remove two nuts (6) from heat sink (7).
d
Unsolder two pins (9) of power transistor on heat sink (7) and remove control board (5) from
heat sink (transistor remains on heat sink).
4-88
