C3
TM9-4935-481-14-1
Table 3-14. TTS Performance Test-Continued
Table 3-14. TTS Performance Test-Continued
STEP
UNIT
PROCEDURE
CORRECTIVE ACTION
STEP
UNIT
PROCEDURE
CORRECTIVE ACTION
272
PPE
Momentarily actuate TEST START switch if required (power off).
SEQUENCE SE.
DYNAMIC GAIN
273
!ICP
SELECTOR A switch to A15.
POS
Perform dynamic gain threshold adjustment per Table
274
MCP
SELECTOR C switch to C4.
AUTO 3
1. CALIBRATE
DYNAMIC
3-13, TTS Maintenance Calibration. Replace card 1A3.
275
CIP
RUN/HOLD/OFF switch to RUN.
GAIN
If NO-GO condition still exists after replacing card 1A3,
276
PPE
Momentarily actuate TEST START switch (power on).
THRESHOLD
2. CARD 1A3.
check connector pins 4, 7, and 11.
277
TTS
Observe a complete test cycle for approx. 21 sec. (completed when
CHECK 1A3
TESTING lamp extinguishes and GO or NO-GO lamp illuminates).
4,7,11
(28)
NOTE
Corrective action for steps 278 through 394 is
NOTE
The following steps MUST be performed exactly in sequence or they are invalid. If
3-15 for corrective action is
explained in
the
sequence is interrupted, begin over at step 253. TTS MODE switch positions are
following illustration.
abbreviated.
278
TTS
Set MODE switch to the positions indicated and observe the
SEQUENCE
DYNAMIC GAIN
appropriate lamp (NO-GO = N, GO = G) illuminated. (Where
SW. POS.
Replace card 1A3.
a dash is indicated, ignore the lamps and proceed to the
1. NO CAL
If NO-GO condition still exists after
AUTO 1
next switch setting.)
2. CARD 1A3
replacing card 1A3, check connect to
CHECK 1A3
pins 4, 6, and 11.
AUTO2
(30)
Go to fault isolation step (30) in
DG
AGC
FIL
IR
WC
RIP
HE
VP
VE
TS
SQ
N
N
N
G
N
N
N
N
N
N
G
279
PPE
Momentarily actuate TEST START switch (power off).
280
PPE
SEQUENCE switch to AUTO 2.
3-266