22 Measure, with the ratiometers, the voltage ratio AB/AC between pin A and pin B and between pin A and pin C (AC). 
23 Measure, with the ratiometers, the voltage ratio DE/DF between pin D and pin E and between pin D and pin 
F. 
24 Set the actuator to the ELECTRICAL RETRACTED position (door flight opened). 
Make sure that the voltage ratio AB/AC = 
0.902 + 0/- 0.010. Record AB/AC. 
Make sure that the voltage ratio DE/DF = 
0.902 + 0/- 0.010. Record DE/DF. 
Page 1014 
Mechanical Stop Extended Position
pin E
VERSIONS ABC - STROKES, MICROSWITCHES AND POTENTIOMETER TEST 
Figure 1005/GRAPHIC 21-53-12-991-006-A01
Page 1015 
21-53-12 
JUN 15/10 
(b) For Versions DE 
ACTION  RESULT
1  Connect the actuator to the Electrical Test Set-Up (ratiometers) (Ref. to Fig. 1001). 
2  Carefully set the auto-transformer to have a very low displacement speed (lower than 1 mm/s (0.039 in/s)) (Ref. to Fig. 1003). 
3  Set the actuator to the MECHANICAL STOP RETRACTED position (door fully closed). 
4  (Ref. to Fig. 1006). 
5  Measure the distance DRF between the measurement point X and the measurement point Y. 
6  Measure the total resistance X of the main potentiometer between pin A and pin C of the connector. 
7  Measure the total resistance Y of the secondary potentiometer between pin D and pin F of the connector. 
8  Calculate |X – Y|. 
9  Measure, with the ratiometers, the voltage ratio AB/AC between pin A and pin B and between pin A and pin 
C. 
10 Measure, with the ratiometers, the voltage ratio DE/DF between pin D and pin E and between pin D and pin 
F. 
11 Carefully set the auto-transformer to have a displacement speed between 3 mm/s and 5 mm/s (between 0.118 in/s and 0.197 in/s). 
Record DRF. 
Make sure that X = 6600 ± 660 .. Record X. 
Make sure that Y = 6600 ± 660 .. Record Y. 
Make sure that |X – Y| < 660 .. Record |X – Y|. 
Make sure that AB/AC = 0.0634 +0.0080/-0. 
Record AB/AC. 
Make sure that DE/DF = 0.0634 +0.0080/-0. 
Record DE/DF. 
Page 1016 
ACTION RESULT
12 Set the actuator to the ELECTRICAL EXTENDED position (door flight opened). 
13 Measure the distance E between the measurement point X and the measurement point Y. 
14 Measure, with the ratiometers, the voltage ratio AB/AC between pin A and pin B and between pin A and pin 
C. 
15 Measure, with the ratiometers, the voltage ratio DE/DF between pin D and pin E and between pin D and pin 
F. 
16 Set the actuator to the ELECTRICAL RETRACTED position (door flight closed). 
17 Measure the distance D between the measurement point X and the measurement point Y. 
18 Measure, with the ratiometers, the voltage ratio AB/AC between pin A and pin B and between pin A and pin 
 
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