TM 11-5840-360-14-1-1
5.9.1 Troubleshooting Charts
21. At Switching Units, select DS-6 mode per Table
Fault isolation within each of the equipment units
22. Repeat steps 4 through 14 above and perform
used in the AN/SPS-64(V) Radar Sets is supported by
steps 23 and 24 below for DS-6 mode per the following
troubleshooting flow charts.
In general, a
definitions:
troubleshooting chart is provided for each equipment
a. Master indicator: Indicator C
unit; exceptions to this are:
b. Slave indicators: Indicator A, B, AN/SPA-
a. Troubleshooting data for the Wave Guide
25, AN/SPA-66
Switch SA-2140 used in the AN/SPS-
c. Receiver Transmitter: MTR II (S-band)
64(V) 2 Radar Set is included in the
23. At Receiver Transmitter RT-1241, set
troubleshooting chart for the Interface Unit
MONITOR SELECT switch to MAG I; verify meter
J-3463, Figure 5-12.
reading is at high edge (but within) green zone. /5-
b. Troubleshooting data for the Control
17(55)/
Indicator C-10260 used in the AN/SPS-
24. At Receiver Transmitter RT-1241, set
64(V)4 Radar Set is included in the
MONITOR SELECT switch to XTAL 1, then XTAL 2;
troubleshooting chart for the Signal Data
verify meter reading is in green zone for both positions
Converter CV-3442, Figure 5-24.
and differential between readings is not greater than
Initiation of troubleshooting per the flow chart for a
one-half the green zone. /5-17(56)/
particular equipment may be indicated in several ways,
25. Refer to Table 3-3; perform a through d below
the most common being: 1) reference from the
for each mode: /Para. 5-13/
applicable
System
Maintenance
Performance
Verification Procedure (see paragraph 5.8); 2) reference
a. Set POWER switch to OFF at all
from the troubleshooting flow chart for an interfacing
AN/SPS64(V) Indicators.
equipment; and 3) obvious equipment oriented faulty
b. Select mode at Switching Units per Table
indications (e.g., no antenna rotation, panel lamps not
lit, lack of response t: , operating controls or built-in test
c. Set Indicator POWER switches as follows:
controls, etc.).
The troubleshooting charts provide
(1) Master Indicator(s): TX ON
instructions for making observations or measurements
(2) Slave Indicator: ST BY
and require the technician to make a "go/no-go" type of
d. After 3.5-minute time delay; verify the
decision for each observation or measurement. Based
following:
on the decision, the technician is directed to proceed to
another instruction; this process continues until the fault
(1) Proper Receiver Transmitter versus
is isolated to a particular replaceable assembly or
master Indicator selection.
component.
(2) Proper
master/slave
Indicator
When a troubleshooting instruction calls for
selection.
measurement of a waveform amplitude or voltage level
and the required amplitude or level is given without
SECTION IV: EQUIPMENT CORRECTIVE
tolerances, the "go/no go" decision should be based on
MAINTENANCE
the following guidelines.
5.9 GENERAL
1. When the required voltage level is given in
whole numbers, use a tolerance of 10%.
This section contains corrective maintenance
2. When the required voltage level is given with
information for each equipment used in the
decimals indicated (e.g., 13.6V or 7.0V), use a tolerance
AN/SPS64(V) Radar Sets. The information is presented
of 0.5 or 10%, whichever is less.
by equipment unit and comprises, as applicable,
troubleshooting
instructions,
removal/replacement
3. For waveforms, use the voltage criteria given
procedures and alignment procedures for each
above for signal amplitude if the observed waveshape is
equipment. Because of the equipment locations and
as shown in the chart.
functional interactions, two technicians are generally
required for performance of the troubleshooting and
When a fault appears to be isolated to a replaceable
alignment procedures.
Prior to initiating any
printed
circuit
board
(PCB)
assembly,
the
removal/replacement procedure, all power must be
troubleshooting charts instruct the technician to replace
removed from the unit under test by turning off all ships
the PCB; the dc voltages required for operation of the
circuit breakers associated with the unit under test.
PCB should always be checked per the appropriate
Following removal/replacement activity, alignment of
schematic diagram in Chapter 6 prior to PCB
the equipment unit(s) involved must be verified per the
replacement.
applicable alignment procedures.
5-11
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