TM9.4935-481-14-1
C4
Table 3-14. TTS Performance Test-Continued
Table 3-14. TTS Performance Test-Continued
STEP
UNIT
PROCEDURE
CORRECTIVE ACTION
STEP
UNIT
PROCEDURE
CORRECTIVE ACTION
NOTE
13
MCP
SELECTOR A switch to C15.
Loosen the 24 captive screws securing the UUT panel to the UUT base and
14
MCP
SELECTOR B switch to D23o
raise the panel. Loosen the two screws securing the cover over the PC cards
15
MCP
SELECTOR C switch to C4.
and raise it, allowing it to engage the hook behind the front panel to support
16
TPS
WIDTH(MS) dial to 10.0.
the front panel. Loosen the bolt on the TTS thermistor bracket and fasten the
17
PPE
FUNCTION TEST switch to +24V REG.
thermistor cable probe to the bracket as shown in figure 3-36.1. Tighten the
18
TTS
MODE switch to BORESIGHT.
bolt on the thermistor brackets Connect second thermistor probe to OAC as
19
TTS
CHARGE switch to On
shown in figure 3-36.2.
Battery Charger
CAUTION
20
TTS
Momentarily depress the CHARGING and FULL CHARGE lamps and observe
Troubleshoot TTS card with isolated scope/DMM only. Failure to comply may
they illuminate.
result in abnormal ground connections causing excessive current flow and
Replace the lamps.
component failures.
21
TTS
Observe CHARGING or FULL CHARGE lamp illuminated.
6
PP
MAIN POWER and DMS switches to On
22
MCP
Disconnect 1W14 cable from J17.
7
TP
Momentarily actuate TEST START switch.
23
MCP
Connect the thermistor cable to J17.
8
CT
A INPUT switch to neg.
24
MCP
DMM LO switch to EXT.
9
CT
B INPUT switch to neg.
25
MCP
DMM FUNCTION switch to K OHMS.
10
CT
FUNCTION switch to Time A + B.
26
MCP
DMM INPUT witch to DMM INPUT.
11
CT
FREQ/TIME/MULT switch to 103.
27
MCP
Observe and record the DMM reading.
12
CT
Adjust DISPLAY control fully cw (to HOLD)
28
MCP
DMM FUNCTION switch to VDC.
.
29
MCP
DMM INPUT switch to SEL A.
30
MCP
DMM LO switch to 5.
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