S 865-055-003

 (7)  
Remove electrical power if it is not necessary (AMM 24-22-00/201).

 TASK 24-11-11-735-066-003
 2.  Disconnect Wiring Test - Variable Speed Constant Frequency__________________________________________________________ Generator/Converter___________________
 A.  General
 (1)  
This test will also make sure that the disconnect wiring for the VSCF operates correctly. When you push the DISCONNECT switch, the VSCF disconnects electrically (removes the field current) and the generator continues to turn. When you push the switch on the VSCF to DISCONNECT RESET, the VSCF connects again.

 B.  
References

 (1)  
AMM 24-11-11/401, Variable Speed Constant Frequency Generator/Converter

 (2)  
AMM 24-21-00/101, AC Generation System

 (3)  
AMM 24-22-00/201, Manual Control

 (4)  
WDM 24-21-11, WDM 24-21-21, WDM 80-11-11

 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù.
 VARIABLE SPEED CONSTANT FREQUENCY ú  24-11-11
 GENERATOR/CONVERTERS WITH THE THREE ú CONFIG 3 LIGHT DISPLAY MODULE ú 01 Page 507 ú Nov 12/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
 C.
D.
E.
F.

A
737-300/400/500MAINTENANCE MANUAL
Prepare for the Disconnect Test.
 S 865-067-003
 (1)  Supply electrical power to the airplane busses from the APU generator or the external power source (AMM 24-22-00/201).
 (a) Make sure that the applicable DRIVE or LOW OIL PRESSURE No. 1
 or 2 light on the P5-5 panel is on.Do a Test of the Electrical Disconnect Wiring for the VSCF.
 S 845-118-003
 (1)  
Open the applicable Engine Start Valve circuit breaker on the P6-2 panel (ENGINES START VALVE ENG 1 [C1103]) or (ENGINES START VALVE ENG 2 [C154]) to override the engines not running lockout of disconnect function installed on some airplanes.

 S 985-071-003

 (2)  
Operate the applicable DISCONNECT No. 1 or No. 2 switch on the P5-5 panel.

 (a)  
If the guard on the DISCONNECT switch has lockwire in it, remove the lockwire.

 (b)  
Lift the guard on the DISCONNECT switch.

 (c)  
Push and release the DISCONNECT switch.

 S 215-073-003
 (3)  
Close the circuit breaker opened in step 1.

 S 985-076-003

 (4)  
Lower the guard on the DISCONNECT switch.

 (a) If there was lockwire in the guard when you disconnected the
 VSCF, install new lockwire.Do the Fault History Display Procedure to make sure the VSCF is Disconnected (Fig. 501).
 S 985-077-003
 (1)  
Push the LIGHTS switch in the top right corner of the captain's flight instrument panel P1-1 to BRT.

 (2)  
Open the CSD access door.

 S 985-080-003

 (3)  
Push and hold the S1 switch on the VSCF.

 S 015-078-003
 (a)  Make sure the Display lights do not come on.
 S 985-082-003
 (4)
Release the S1 switch on the VSCF.Make Sure that the VSCF Connected Correctly.

 (1)  
Push and release the S2 switch on the VSCF.

 S 765-087-003
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù.
 VARIABLE SPEED CONSTANT FREQUENCY ú  24-11-11
 GENERATOR/CONVERTERS WITH THE THREE ú CONFIG 3 LIGHT DISPLAY MODULE ú 01 Page 508 ú Nov 12/00
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
 S 765-119-003
 (2)  Push and hold the S1 switch on the VSCF.
 (a)  Make sure the Display lights come on.
 S 765-120-003
 (3)  
Release the S1 switch.

 S 765-089-003

 (4)  
Close the CSD access door.

 S 865-091-003

 (5)  
Remove electrical power if it is not necessary (AMM 24-22-00/201).

 TASK 24-11-11-765-121-003
 3.  Fault History Display Procedure - Variable Speed Constant Frequency___________________________________________________________________ Generator/Converter___________________
　
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