TB 9-4920-362-35
(19) Connect digital voltmeter positive side to pin 4 at other end of cable W1 marked
TO PITCH TRIM ACTUATOR, using lead (B6). Connect digital voltmeter negative side to
SIG GRD, using lead and adapter (B2 and B3).
(20) Set AC POWER switch to ON. Digital voltmeter will indicate between 14.5 and
15.5 V dc.
(21) Repeat technique of (17), (19), and (20) above at connections listed in table 4.
Digital voltmeter will indicate within limits specified.
Table 4. Dc Voltage
Test instrument
Digital multimeter indications (V dc)
TO PITCH TRIM
Test points position
Min
Max
ACTUATORR connector
XDCR
Pin 7
---
+14.5
+15.5
Pin 8
---
-14.5
-15.5
Pin 5
---
-14.5
-15.5
Jumper pins 5 and 9
Trim position
-14.5
-15.5
1
2
Jumper pins 5 and 6
Stick input
-14.5
-15.5
1
2
1Use
two leads (B6).
2Use adapter and lead (B1 and B4).
(22) Set AC POWER switch to OFF and disconnect cable W1 from TI.
b. Adjustments. No adjustments can be made.
9. Valve Current Meter
a. Performance Check
(1) Connect cable W2 (supplied with TI) to connector J3 on TI.
(2) Connect digital multimeter (A3) mA terminal to pin 2 of SAS ACTUATOR end of
cable W2, and LOW terminal to pin 1, using two leads (B6).
(3) Set TRIM COIL SELECT switch to BOTH.
(4) Set AC POWER switch to ON.
(5) Adjust CURRENT CONTROL cw toward INCR until valve current meter
indicates -10.00 mA. If digital multimeter does not indicate between -9.50 and -10.50 mA,
perform b below.
(6) Set AC POWER switch to OFF.
(7) Repeat technique of (2) through (6) above at connection and switch positions
listed in table 5. Digital multimeter will indicate within limits specified.
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