D. Control Wheel Position Transducer Test
 S 864-056
 (1)  
If you use test equipment other than the hand-held download unit (HHDLU), install the tester to the test connector at the right side panel, P61.

 S 864-048

 (2)  
If you use the hand-held download unit (HHDLU), attach the HHDLU to the test connector at the front side of the flight data recorder.

 NOTE: To get access to the FDR, open the lower ceiling panel No. 1
____ above the aft galley (AMM 25-22-02/401). The HHDLU can only be connected to the AlliedSignal flight data recorder (FDR).
 S 864-018
 (3)  
Supply electrical power (AMM 24-22-00/201).

 S 864-019

 (4)  
Remove the DO-NOT-CLOSE tags and close the P11 panel circuit breakers :

 (a)  
11J7, FLIGHT RECORDER AC

 (b)  
11J8, FLIGHT RECORDER DC

 (c)  
11S1, AIDS SENSOR

 
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 GUN 051, 102-999  ú ú 10 Page 404 ú Jan 28/02

A
757
MAINTENANCE MANUAL

 S 864-049
 (5)  With the Data Signal Display Unit (DSDU), set the control switches on the tester as follows:
 (a)  
Set the power switch to the ON position.

 (b)  
Set the INPUT switch to the ARINC INPUT DATA position.

 (c)  
Set the SYNC switch to the SYNC B position.

 (d)  
Set the DATA PARAMETER/DOCUMENTARY switch to the DATA PARAMETER position.

 (e)  
Set the OCTAL DISPLAY switch to the 12 BIT position.

 (f)  
Set the SUBFRAME and WORD as specified.

 S 864-050
 (6)  With the Teledyne tester (P/N 2222786), set the switches on the tester as follows:
 (a)  
Set the POWER switch to the ON position.

 (b)  
Set the READOUT switch to the ACTF DATA position.

 (c)  
Set the UPDATE switch to the AUTO position.

 (d)  
Set the DFDAU/DFDR DATA SELECTOR switch to the DFDAU position.

 (e)  
Set the DATA switch to the 12 BIT position.

 (f)  
Set the SUBFRAME and WORD as specified.

 S 864-051
 (7)  With the Teledyne tester (P/N 2229738), set the switches on the tester as follows:
 (a)  
Push the CLR switch two or three times to clear all inputs.

 (b)  
Push the DFDR switch and then the ENT switch.

 (c)  
Set the SUBFRAME and WORD as specified.

 S 864-052
 (8)  With the hand-held download unit (HHDLU), do the steps that follow:
 NOTE: These steps are for airplanes equipped with AlliedSignal FDR
　
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