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TM 11-5820-890-30-5
CHAPTER 15
TRAY, BATTERY CY-8664/VRC
MAINTENANCE INSTRUCTIONS
Subject
Section
Principles of Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . I
Repair Parts, Special Tools, TMDE, and Support Equipment . . . . . . . . . . . . . . . . . . . . . . . II
Troubleshooting Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . III
Maintenance Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . IV
Preparation for Storage or Shipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . V
Page
15-1
15-2
15-3
15-18
15-42
Section I. PRINCIPLES OF OPERATION
Subject
Para
Page
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15-1
15-1
Mounting Plate Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15-2
15-1
Battery Tray Subassembly (12A1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15-3
15-2
Battery Tray Circuit Card Assembly (12A1A1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15-4
15-2
Connector Board Circuit Card Assembly (12A1A2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15-5
15-2
NOTE:
The charging function of this device is disabled when a Lithium battery is installed. There is
presently no acceptable Nicad battery for this device, so the Nicad SENSE line has been factory
disconnected effectively disabling the charging function.
15-1. INTRODUCTION.
The Tray, Battery CY-8664/VRC (battery tray), which operates in conjunction with the Battery Box CY-8523A/PRC
and the Power Supply Adapter MX-10862/VRC, provides a battery backup capability, using a lithium battery, for
certain single radio mount applications. This battery backup capability is the primary function and is intended to
supply +13 V dc to the RT when the +27.5 V dc primary power drops to +7 V dc for longer than 300 milliseconds.
This occurs in certain vehicles when hydraulic systems are operated. The battery tray also has test circuitry to
indicate battery operability. The battery tray has four main sections:
a.
Plate, Mounting, Battery Tray (mounting plate assembly)
b.
Battery Tray Subassembly (12A1)
c.
Circuit Card Assembly, Battery Tray (12A1A1)
d. Circuit Card Assembly, Connector Board (12A1A2)
They are described in the following paragraphs:
15-2. MOUNTING PLATE ASSEMBLY.
The mounting plate assembly is mounted on the bottom of the battery tray subassembly (12A1). It provides two
basic functions:
a.
It provides an environmental seal for the battery tray.
b.
It supports the battery tray subassembly (12A1) that controls the operation of the battery tray.
15-1
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