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Home > Ordnance Documents and other related manuals > > Part C- Direct Support Maintenance Instructions
Figure 1-14. Interface Block Diagram.
Figure 1-15. Special Tools And Test Equipment.

Troubleshooting ther AN/ GVS-5 Laser Observation Devise Test Set, TS-3620
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driver CR4 in the transmitter circuit (see figure 1-12), causing LED
CR3 to generate an output optical pulse 10 5 nanoseconds wide at 1064
nanometers.  The LED output is diffused and collimated to illuminate
the receiving optics in the LR.  For 2 TGT and RCVR 2 PULSE modes, a
second pulse is required.  This is accomplished by the triggering of
the 2-targets pulse generator U1A, through driver Q2.
This in turn
connects to the LED driver CR1 in the transmitter circuit, causing
LED  CR3  to  generate  a  second  optical  pulse  with  the  same
characteristics,  at  a  time  delay  of  0.67  0.33  microseconds,
equivalent to a target separation of 100 50 meters.
TARGET SYNC PULSE (J4), RCVR SYNC PULSE (J3), and LASER PULSE (J2)
are  generated  as  appropriate  and  are  available  for  testing  and
troubleshooting.  Figure 1-14 illustrates a simplified block diagram
of  the  operational  interface  of  the  LR  and  the  LR  Test  Set
components.
PART C - DIRECT SUPPORT MAINTENANCE INSTRUCTIONS
This  part  of  the  lesson  provides  instructions  on  the  testing,
troubleshooting,  and  maintenance  of  the  LR  Test  Set.
These
procedures include conducting voltage and  resistance measurements,
pulse
checks,
visual
inspection,
and
a
pass/fail
test.
Troubleshooting consists of following a step-by-step troubleshooting
chart  and  performing  the  indicated  corrective  maintenance.
This
lesson  intersperses  appropriate  warnings,  cautions,  and  notes  to
avoid personnel injury and equipment damage.
In those cases where fixing the trouble is beyond the scope of direct
support level maintenance, send the LR Test Set to the depot.
In
such cases, the LR Test Set must be fully assembled and complete.
1.
Voltage and Resistance Measurements.
In order to perform the voltage and resistance measurements, you must
remove the LR Tester from its case.
To remove the LR Tester, you
remove the case cover (figure 1-9, item 6), loosen and remove the ten
mounting screws (figure 1-9, item 7), and lift the LR Tester out of
the base (figure 1-9, item 20).
The  measurements  described  below  are  the  circuit  performance
standards  you  use  when  testing  and  troubleshooting.
The  test
conditions under which the measurements are obtained are also given.
To perform the test and repair of the LR Test Set, you will need the
equipment listed in figure 1-15.  This equipment is not furnished as
a part of TK-100/G or TK-105/G.
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OD1716






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