TB 9-4920-456-24
Table 6. Key Indicator Light Test Continued.
Calibration test fixture
Key entry
switch positions
Test instrument
and
SELECT
INPUT/OUTPUT
keyboard
indicator
Multimeter
S2
indications1
S1
section
light
Light
(TRANSPONDER
C
3
M-3/A BIT
Lit
Low
CONTROL)
C
3
M-3/A BIT
Off
High
(TRANSPONDER
C
4
M-C BIT
Lit
Low
CONTROL)
C
4
M-C BIT
Off
High
(MODE 4)
C
5
BIT
Lit
Low
C
5
BIT
Off
High
(TRANSPONDER
C
6
M-1 ENBL
Lit
Low
CONTROL)
C
6
M-1 ENBL
Off
High
(TRANSPONDER
C
7
M-2 ENBL
Off
High
CONTROL)
C
7
M-2 ENBL
Lit
Low
(TRANSPONDER
C
8
M-3A ENBL
Off
High
CONTROL)
C
8
M-3A ENBL
Lit
Low
(TRANSPONDER
C
9
M-C ENBL
Off
High
CONTROL)
C
9
M-C ENBL
Lit
Low
(TRANSPONDER
C
10
M-T ENBL
Lit
Low
CONTROL)
C
10
M-T ENBL
Off
High
(TRANSPONDER
C
11
NORM
Lit
Low
STBY (NORM2)
CONTROL)
C
11
Off
High
(TRANSPONDER
C
12
EMER
Lit
Low
STBY (EMER2)
CONTROL)
C
12
Off
High
SPARE23
(TRANSPONDER
C
13
Lit
Low
CONTROL)
C
13
SPARE 2
Off
High
(TRANSPONDER
C
14
SPARE 3
Lit
Low
CONTROL)
C
14
SPARE 3
Off
High
(TRANSPONDER
C
15
STBY
Lit
Low
OFF (STBY2)
CONTROL)
C
15
Off
High
NORM
C
15
Lit
Low
OFF (NORM2)
C
15
Off
High
EMER
C
15
Lit
Low
OFF (EMER2)
C
15
Off
High
Low level is less than 0.4 V dc. High level is approximately 28 V dc.
1
Indicator light only.
2
3 Refer to figure 1 for location.
(6) Press TI STBY key on TRANSPONDER CONTROL KEYBOARD.
(7) Move multimeter high lead from high VOLTMETER (LGC) and connect lead to
EJECT test jack.
(8) Press EJECT key on TI TRANSPONDER CONTROL keyboard; EJECT key
indicator light will be on and multimeter will indicate between 22 and 28 V dc.
13