TM 11-5840-360-14-1-1
Table 2-6 PRF Generator PCB Data Selector Wiring
Delay Jumpers
Mode
A
B
Coarse
Fine
(120 ft. per Tap) (15 ft. per Tap)
Master, Receiver Transmitter I
1
0
E28 to a Tap
E35 to a Tap
E18 thru E26
Slave, Receiver Transmitter I
0
0
E1 thru E16
E33 to a Tap
E1 thru E16
E18 thru E26
Master, Receiver Transmitter II
1
1
E29 to a Tap
E34 to a Tap
or single Receiver Transmitter/
E1 thru E16
E18 thru E26
Indicator system
Slave, Receiver Transmitter II
0
1
E31 to a Tap
E32 to a Tap
El thru E16
E18 thru E26
2.6.5 Initial Alignment
Before proceeding with initial alignment, perform the
Note:
following checks to insure that the printed circuit board
4/5 A2A7 PCB
4/5 XA2A7 PCB
(see
(PCB) links (jumpers) in the indicator are properly
Readout
Link
Socket Jumpers
below
installed for the options included.
)
CAUTION
Nautical Miles
E1 to E2
A to 1
1
INSURE
INDICATOR
POWER
B to 2
SWITCH IS OFF BEFORE REMOVING
C to 3
ANY PCB.
Statute Miles
E1 to E2
A to 1
2
B to 2
2.6.5.1 Video Amplifier PCB 4/5 A2A1. - Check the
C to 3
links on Video Amplifier PCB 4/5 A2A1 as follows:
Kilometers
E1 to E2
A to 2
1
1. If the Electronic Bearing Line (EBL) PCB
B to 3
4/5 A2A9 is not installed, link terminals El to E2 on 4/5
C to 4
A2A1 PCB. If EBL is installed, do not link.
2. If the Variable Range Marker (VRM) PCB
NOTE 1
4/5 A2A7 is not installed, link terminals E3 to E4 on 4/5
PRF Generator PCB 4/5 A2A6 must be
A2A1 PCB. If VRM is installed, do not link.
linked for nautical miles (see paragraph
2.6.5.2 Data Storage PCB 4/5 A2A3. - If Interference
2.6.4.2, item 5 above) .
Reject (IR) PCB 4/5 A2A5 is not installed, place links
NOTE 2
between the following terminals on the Data Storage
PRF Generator PCB 4/5 A2A6 must be
PCB 4/5A2A3; if IR PCB 4/5 A2A5 is installed, do not
linked for statute miles (per paragraph
link.
2.6.4.2, item 5 above).
1. Link terminal El to E2.
If a six-digit LED PCB (167516-1) is installed in the
2. Link terminal E3 to E4.
indicator, only the yards readout is available. The following
2.6.5.3 Variable Range Marker PCB 4/5 A2A7.VRM
links and jumpers must be installed to obtain the proper
PCB 4/5 A2A7 can drive either three-digit (nautical or
readout.
statute miles or kilometers) or six-digit (yards) LED
1. 4/5 A2A7 PCB Link: E1 to E3.
displays. The VRM LED readout PCB 4/5A6 installed
2. 4/5 XA2A7 PCB Socket Jumpers:
on the bezel assembly determines which readouts are
available for the installed indicator. If a three-digit LED
A to 3
PCB (167985-1) is installed, nautical mile, statute mile
B to 2
or kilometer readouts are available; the following listing
C to 4
gives links and jumpers required for these three-digit
readouts.
2-24
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