TM 55-4920-429-13
APPLIED TEST VOLTAGE
10 VAC
+6 VAC
GYRO TEST SWITCHES
(line)
(line)
Neutral
Left
Right
DMM
J3-U
J3-V
J3-T
ROLL
X Y
+3.6 To +4.4
J3-U
J3-V
J3-T
ROLL
YZ
+5.4 To +6.6
J3-U
J3-V
J3-T
ROLL
ZX
-9.0 To -11.0
J3-P
NC
J3-N
PITCH
X Y
+9.0 To +11.0
J3-P
J3-P
J3-W
J3-W
J3-W
J3-s
NOTE
Connect a 10K ohm resistor across the HI and LO binding posts.
NC
J3-N
PITCH
YZ
NC
J3-N
PITCH
ZX
J 3 -X
J 3 -X
J 3 -X
J3-t
NOTE
Disconnect 10K ohm resistor.
J3-Y
HDG
J3- Y
HDG
J3- Y
HDG
NC
HDG ERR
X Y
YZ
ZX
X Y
0 (open)
0 (open)
+3.6 To +4.4
+5-4 To +6.6
-9.0 To -11.0
+3.6 To +4.4
NOTE
Connect a 10K ohm resistor across HI and LO binding binding posts.
J3-s
J3-t
NC
HDG ERR
YZ
0 (open)
J3-s
J3-t
NC
HDG ERR
ZX
0 (open)
d. Disconnect 10K-ohm resistor. Disconnect ac power supply.
4-34. CPT MONITOR Test. This test insures that the CPT MONITOR and METER SOURCE cir-
cuits function as required. Each ac test signal shall be in phase with the 115 volt ac source at Jl-B. All
sources shall have a common return. (See fig. 4-4. ) (see FO-8 for connector pin patterns.)
NOTE
When a test includes a requirement that an ac voltage be in-phase or
out-of-phase, oscilloscope channel A must be connected across the
digital multimeter. Oscilloscope channel B must be connected to the ac
source and the oscilloscope externally triggered from the ac source.
4-23
