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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
 B.
C.
D.
E.
F.
A
737-300/400/500MAINTENANCE MANUAL
Special Tools and Equipment
 (1)
Proximity System Test Equipment - C32004References

 (1)  
24-22-00/201, Manual Control

 (2)
32-09-20/401, Landing Gear Logic Shelf (E-11) Printed Circuit CardsAccess

 (1)  
Location Zones 101 Control Cabin 102 Control Cabin 204 Nose Gear 310 Left Main Landing Gear 410 Right Main Landing Gear

Prepare to Do the Tests
 NOTE: Do these steps before you do one or more of the tests that follow.
____ S 865-002
 (1)  
Supply electrical power with an external source (Ref 24-22-00/201).

 S 865-003

 (2)  
Make sure all the circuit breakers for the landing gear on the

 circuit breaker panel, P6, are closed.Do a Self Test of the Proximity System Tester
 S 845-005
 (1)  
Prepare to do the self test.

 (a)  
Set the component SELECTOR switch on the tester to SELF TEST.

 (b)  
Set the POWER switch to LAMP TEST.

 1)  Make sure that all the lights including the LOW BATTERY light come on.

 (c)  
Set the POWER switch to ON.

 S 725-006
 (2)  
Do the self test.

 (a)  
Set the test group SELECTOR switch to GRP I.
 1) Make sure the NEAR light comes on.

 (b)  
Set the CARD TEST switch to FAR.
 1) Make sure the FAR light comes on.

 (c)  
Set the CARD TEST fault switch to FAULT.
 1) Make sure the FAULT and FAR lights come on.

 (d)  
Do the self test procedure again with the test group SELECTOR switch set to GRP II, and then to GRP III.

 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
 G. Do a Test of the Proximity System/Target Assembly
 S 845-007
 (1)  
Prepare to do the test.

 (a)  
Disconnect the applicable electrical connector for the sensor being tested.

 NOTE: To find the applicable connector, you can use the WDM to
____ find the connector nearest the sensor being tested. It can be at the wheel well wall, strut bracket, or other location where it is easy to get access.
 (b)  
Install jumpers between the sensor leads and the INTERFACE terminals on the tester.

 (c)  
Set the component SELECTOR switch to SENSOR.

 (d)  
Set the test group SELECTOR switch to the correct group.

 NOTE: Use the Proximity Sensing Component Categories table to
____ find the correct group number.
 S 725-008
 (2)  
Do the test.

 (a)  
On the tester, set the POWER switch ON.

 NOTE: If the SENSOR MONITOR TARGET FAULT light on the tester
____ comes on, a short or open circuit exists in the sensor or airplane wire.
 (b)  
Do the step that follows if the sensor and target for the test are not in the target near configuration: 1) Put the sensor and its target in the target near

 configuration.

 (c)  
On the tester, make sure the SENSOR MONITOR TARGET NEAR light comes on.

 (d)  
Put the sensor and its target in the target far configuration.

 (e)  
On the tester, make sure the SENSOR MONITOR TARGET FAR light comes on.

 S 845-009
 (3)  Put the airplane in its usual condition if you are done with the tests.
 NOTE: You can continue with more tests if it is necessary.
____
 (a)  
Put the sensor and its target back to their usual configuration, if it is necessary.

 (b)  
On the tester, set the POWER switch to OFF.
　
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