14-3. BATTERY TRAY SUBASSEMBLY (12A1).
The battery tray subassembly consists of the battery tray case (chassis) and the following components that are
mounted on it: resistor R1, zener diode VR1, connector J1, voltage regulator U1, lamp holder DS1, pushbutton
switch S1, connector P1, terminal lugs, interconnection wiring, seal screw, battery tray circuit card assembly
(12A1A1), and connector board circuit card assembly (12A1A2). A schematic diagram of the battery tray
subassembly is included in figure FO-29. The battery tray subassembly has two circuit card assemblies. They are
described in the following paragraphs:
14-4. BATTERY TRAY CIRCUIT CARD ASSEMBLY (12A1A1).
The battery tray circuit card assembly provides the switching and power sense functions that enable the +13 V dc
from the battery box to power the RT during heavy vehicular power drain conditions, such as activating certain
hydraulic systems. The circuit card assembly contains two relays, several diodes. and a voltage comparator.
14-5. CONNECTOR BOARD CIRCUIT CARD ASSEMBLY (12A1A2).
The connector board circuit card assembly provides the connection between the battery box and the battery tray
circuit card assembly.
Section Il. REPAIR PARTS,
14-6. COMMON TOOLS AND EQUIPMENT.
SPECIAL TOOLS, TMDE,
For authorized common tools and equipment, refer to the Modified Table of Organization and Equipment (MTOE)
applicable to your unit.
14-7. SPECIAL TOOLS, TMDE, AND SUPPORT EQUIPMENT.
For the TMDE and support equipment required for DS, see the maintenance allocation chart. It is Appendix Bin
14-8. REPAIR PARTS.
Repair parts are listed and illustrated in the repair parts and special tools list (TM 11-5820-890-30P-1) covering
direct support maintenance for this equipment.