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|  MIL-D-81347C(AS)
3.4.1.2
Maintenance Control Panel - Each logic unit shall contain a
Maintenance Control Panel (MCP), which shall, as a minimum, provide the maintenance operator with
the capability of monitoring the data and control lines associated with any computer input or output
peripheral contained in the logic unit, and of operating anyone computer input or output peripheral
contained within the logic unit off-line from the computer in either single step or continuous mode
operation. The MCP shall also provide any additional maintenance functions described in the detailed
requirements for the Logic Unit.
NOTE
Since the Maintenance Control Panels for the four
logic units are nearly identical, only one detailed
descriptions given for an MCP. (See MCP section
for Logic Unit 1, 3.5.1.4.9.)
Power Control Panel - All subunits of each logic unit, except the
3.4.1.3
MCP/MCPL subunits and the MTL subunit shall have on/off switches located on the power control
panel. All MCP/MCPL subunits and the MTL subunit shall decontrolled by the master power on/off
switch for the logic unit. Operation of the subunit switches shall be defined as an abnormal operating
condition for the DPS.
Logic Units - Each of the four logic units is comprised of a
3.4.1.4
number of subunits (functional groups of modules). Two criteria were used in the grouping of the
subunits into logic units.
(1) Computer Input/Output Channel Assignment
(2) Functional Relationship
Logic Unit 1 Subunits - Logic Unit 1 shall contain the following
3.4.2
subunits:
No. Required
1
Digital Input Multiplexer
1
Digital Output Multiplexer
1
TACCO Tray Logic
3
Universal Keyset Logic
Pilot Key set/CRT Tray/Oral Panel Logic 3
1
Status Logic
1
Sono Receiver Logic
Auxiliary Readout (ARO) Display
1
Interface Logic
1
Maintenance Control Panel/Logic
1
Power Supply
Logic Unit 2 Subunits - Logic Unit 2 shall contain the following
3.4.3
subunits:
No. Required
1
Magnetic Tape Control Logic
Armament: Ordnance
1
Input Interface
1
Armament Output Interface
1
Ordnance Output Interface
1
Navigation Multiplexer
1
Maintenance Control Panel/Logic
1
Power Supply
12
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