Section I. DSB ELECTRICAL TROUBLE SHOOTING
a. The trouble-shooting flow charts are provided to assist the Unit Maintenance personnel in
systematically diagnosing a fault and providing a solution for the rectification of that fault. The
trouble shooting flow chart indicates faults to LRU level, a qualified electrician can carry out
trouble shooting to component level with the aid of the Launcher Electrical System Drawings at
Appendix G of this manual.
b. This section is to be used to recognize, diagnose and rectify faults that may occur with the
c. Overviews of the electrical system are provided to give the Unit Maintenance personnel
familiarity and quick reference. Manufacturer's schematic drawings are provided to present a
detailed picture of the system.
d. Mechanical trouble shooting associated with the Bridge Modules is provided in the operator's
manual TM 5-5420-279-10.
e. Hydraulic trouble shooting can be found in Chapter 2 of this manual.
f. Harness routing tables have been provided at paragraph 3-6 to assist in finding an electrical
fault in a harness run from the power source to the consumer unit.
g. Hydraulic and electrical assembly location drawings are provided at Appendix D.
h. Circuit diagrams are provided at Appendix G Annex 4 for electrical trouble shooting and are
referenced, where applicable, throughout the trouble shooting flow charts.
i. All joystick operations refer to the operation of the chest pack to achieve specified equipment
LAUNCHER ELECTRICAL SYSTEM OVERVIEW
a. General Description - An electrical system provides power to switches and solenoids which
when activated allow the operator to control the function of the launcher components.
b. Electrical power is supplied from the host vehicle. Harnesses connect junction boxes,
switches and solenoids in the electrical system. Junction boxes redirect electrical supplies to
c. Limit switches and indicators are fitted in the circuit to provide a signal, a visual indication at
the control panel, of the state of a component.
d. Solenoid Valves when activated electrically will allow or stop the flow of hydraulic fluid in the
e. Emergency Stop (E-Stop) switches are fitted in the circuit which, when activated, will shut
down the electrical power to the launcher, halting operations.
A Chest Pack remote control can be plugged into the electrical system.