(5)  
WDM 24-21-11, WDM 24-21-21

 C.
Prepare for the Disconnect Test.

 S 865-065-002
 (1)  Supply electrical power to the airplane busses from the APU generator or the external power source (AMM 24-22-00/201).
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 VARIABLE SPEED CONSTANT FREQUENCY  ú 24-11-11
 GENERATOR/CONVERTERS  ú CONFIG 2 ú 01 Page 511 ú Nov 12/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
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737-300/400/500MAINTENANCE MANUAL
 S 865-067-002
 (2)  Start the engine (AMM 71-00-00/201).
 (a)  Make sure that the applicable DRIVE or LOW OIL PRESSURE No. 1 or 2 light on the P5-5 panel goes off.
 S 985-066-002
 (3)  
Push and release the applicable GEN 1 or GEN 2 switch on the P5-4 panel to ON.

 S 985-068-002

 (4)  
Turn the ac meters switch on the P5-13 panel to the applicable GEN 1 or GEN 2 position.

 (a)
Make sure that the frequency meter shows 400 | 5 Hz.

 (b)
Make sure that the ac voltmeter shows 115 | 5 volts.

 D. Do a Test of the Electrical Disconnect in the VSCF.
 S 985-069-002
 (1)  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 215-071-002
 (2)  
Make sure that the applicable DRIVE or LOW OIL PRESSURE No. 1 or No. 2 light comes on.

 S 865-072-002

 (3)  
Make sure that there is no residual voltage.

 (a)  
Push and hold the RESID VOLTS button.

 (b)  
Make sure that the bottom scale of the ac voltmeter shows less than 5 volts.

 (c)  
Release the RESID VOLTS button.

 (4)  
Do a shutdown of the engine (AMM 71-00-00/201).

 S 985-074-002

 (5)  
Lower the guard on the DISCONNECT switch.

 S 865-073-002
 (a)  If there was lockwire in the guard when you disconnected the VSCF, install new lockwire.
 E. Do the BITE Test to Connect the VSCF Again (Fig. 501).
 S 985-075-002
 (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 015-076-002
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 VARIABLE SPEED CONSTANT FREQUENCY  ú 24-11-11
 GENERATOR/CONVERTERS  ú CONFIG 2 ú 01 Page 512 ú Nov 12/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
 S 985-081-002
 (3)  
Push and hold the switch on the VSCF to INDICATE.

 S 985-083-002

 (4)  
Release the switch on the VSCF.

 S 415-084-002

 (5)  
Close the CSD access door.

 F.
Make Sure that the VSCF Connected Correctly.

 S 865-086-002
 (1)  
Start the engine (AMM 71-00-00/201).

 S 215-088-002

 (2)  
Make sure that the applicable DRIVE or LOW OIL PRESSURE light on the P5-5 panel goes off.

 S 765-101-002

 (3)  
Push and release the applicable GEN 1 or GEN 2 switch to ON.

 (a)  Make sure that the applicable GEN OFF BUS No. 1 or No. 2 light goes off.
 S 215-089-002
 (4)  Make sure that the ac meters switch is set to the applicable GEN 1 or GEN 2 position.
 (a)  
Make sure that the frequency meter shows 400 | 5 Hz.

 (b)  
Make sure that the ac voltmeter shows 115 | 5 volts.

 S 765-100-002
 (5)  
Push and releasse the GRD PWR or the APU GEN No. 1 and No. 2 switches to ON.

 (6)  
Do a shutdown of the engine (AMM 71-00-00/201).

 (7)
　
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