TB 9-4920-456-24
Table 8. Mode 4 Indicator Test.
Calibration test fixture
Test instrument
Switch
Switch position
Keyboard section
Indicator
Indicator condition
TRANSPONDER
S2
15
TEST GO
Off
CONTROL
MODE 4
S6
ON
ZERO
Lit
MODE 4
S6
OFF
ZERO
Off
MODE 4`
S7
ON
CAUT OC
Lit
1
---
S4
15 V
---
---
MODE 4`
S14
ON
REPLY
Lit
MODE 4
S14
OFF
REPLY
Off
MODE 4
S11
ON
CAUT
Lit
MODE 4
S11
OFF
CAUT
OFF
TRANSPONDER
S12
ON
TEST GO
Lit
CONTROL
S2
16
TEST GO
OFF
TRANSPONDER
S8
ON
BIT NO-GO
Lit
CONTROL
S8
OFF
BIT NO-GO
Off
TRANSPONDER
S15
ON
SW AC
Lit
CONTROL
S15
OFF
SW AC
Off
TRANSPONDER
S13
ON
SW DC
Lit
CONTROL
S13
OFF
SW DC
Off
S4 must be in 15 V position to complete table 9.
1
(22) Connect multimeter (ac mode) to LAMP VOLTAGE 5 VAC test jacks on
calibration on calibration test fixture.
(23) Set TI PANEL LIGHTS switch to 5 VOLTS. Multimeter will indicate between
4.77 and 5.83 V ac.
(24) Move multimeter hi lead from LAMP VOLTAGE 5 VAC jack and connect to
LAMP VOLTAGE 28 VAC test jack on calibration test fixture. Set TI PANEL LIGHTS
switch to 28 VOLT. Multimeter will indicate between 25.92 and 31.68 V ac.
(25) Set S9 switch on calibration test fixture to ON.
TI SPARE 6 INDICATOR
LIGHT (fig. 1) on MODE 4 keyboard will light.
(26) Set S9 switch on calibration test fixture to OFF. TI SPARE 6 INDICATOR
LIGHT (fig. 1) on MODE 4 keyboard will be off.
(27) Set S10 switch on calibration test fixture to ON. TI SPARE 4 INDICATOR
LIGHT (fig. 1) on TRANSPONDER CONTROL keyboard will light.
(28) Set Sl0 switch on calibration test fixture to OFF. TI SPARE 4 INDICATOR
LIGHT (fig. 1) on TRANSPONDER CONTROL keyboard will be off.
(29) Return all switches on calibration test fixture to OFF position.
b. Adjustments. No adjustments can be made.
16