S 865-019

 (2)  
Put the L, R, and C FLT CONTROL SHUTOFF switches on the P61 panel to the ON position.

 S 865-020
 WARNING: KEEP PERSONS AND EQUIPMENT AWAY FROM ALL CONTROL SURFACES WHEN
_______ HYDRAULIC POWER IS SUPPLIED. AILERONS, ELEVATORS, RUDDER, FLAPS, SLATS, SPOILERS, AND STABILIZER ARE FULLY POWERED SURFACES. INJURY TO PERSONS OR DAMAGE TO EQUIPMENT CAN OCCUR WHEN HYDRAULIC POWER IS SUPPLIED.
 (3)  
Pressurize the left, right, and center hydraulic systems
 (Ref 29-11-00).

 S 865-021

 (4)  
Open these circuit breakers on the overhead panel, P11, and attach DO-NOT-CLOSE tags:

 (a)  
11J21 or 11J22, ELEV POS RIGHT

 S 225-022
 (5) Make sure the length of the transmitter control rod, between the centers of the attachment fasteners, is 9.30 | 0.02 inches
 (236.2 +/- 0.5 mm).
 S 825-023
 (6)  
If the length is not the necessary dimension, do the steps that follow to adjust the control rod:

 (a)  
Disconnect the transmitter control rod from the elevator.

 (b)  
Turn the control rod one-half turn at a time until the rod has the necessary dimension.

 (c)  
Connect the control rod to the elevator.

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MAINTENANCE MANUAL

 S 825-024
 (7)  Do the steps that follow to adjust the position transmitters (PROCEDURE 1):
 NOTE: PROCEDURE 1 uses a commercially available power supply,
____
 digital voltmeter (DVM) and breakout box.

 (a)  
Disconnect the airplane electrical connector from the position transmitter.

 (b)  
Connect the breakout box and the -19 cable assembly to the position transmitter where the airplane electrical connector was disconnected (Fig. 504).

 (c)  
Connect the digital voltmeter (DVM) to the breakout box at pins 4 (SIG HI) and 5 (SIG LO).

 (d)  
Adjust the power supply voltmeter to 26 | 0.02 volts ac RMS.

 (e)  
Connect the power supply to the breakout box at pins 1 (LO) and 2 (HI).

 (f)  
Turn the adjusting nut to adjust the control rod length until the output voltage (between pins 4 and 5 on the breakout box) is 0.21 | 0.05 volts ac RMS (shown on the DVM).

 NOTE: The voltage will decrease as you make the control rod
____
 shorter.

 (g)  Make sure the rod center-to-center dimension is between 9.08 and 9.47 inches (230.6-240.5 mm).
 NOTE: The transmitter body can be turned in its bracket for
____ the necessary thread and voltage conditions. If you turn the transmitter, tighten the screws and apply sealant (Ref 27-38-02).
 (h)  
Put lockwire on the adjusting nut on the control rod.

 (i)  
Make sure that the output voltage shown on the DVM is

 0.21 | 0.05 volt ac RMS.
 (j)  
Disconnect the power supply and the DVM from the breakout box.

 (k)  
Disconnect the breakout box and -19 cable assembly from the position transmitter connector.

 (l)  
Connect the airplane electrical connector to the position transmitter connector.

 S 825-025
 (8)  Do the steps that follow to adjust the position transmitters (PROCEDURE 2):
 NOTE: PROCEDURE 2 uses airplane power, two digital voltmeters
____
 (DVM's), and a breakout box.

 (a)  Disconnect the airplane electrical connector from the position transmitter.
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

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757 
MAINTENANCE MANUAL
 (b) (c) (d)  Connect the breakout box and -19 cable assembly to the position transmitter where the airplane electrical connector was disconnected (Fig. 504).Connect the digital voltmeter (DVM) No. 1 to the breakout box at pins 4 (SIG HI) and 5 (SIG LO).Connect the -18 cable assembly between the airplane electrical connector and the breakout box.
　
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