24-54-00
ALL ú
ú 01 Page 102
ú Jul 15/94
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
~.............................................................................. | TROUBLE | PROBABLE CAUSE | ISOLATION PROCEDURE | REMEDY | ................................................................................
| No dc standby Relay R356| | Put the Standby Power | |
| power (ac | | Switch to the "OFF" | |
| standby power| | position, and open | |
| may or may | | circuit breaker C29, | |
| be OK) | | STBY BUS POWER. | |
| | | | |
| | | Examine the 28 VDC | |
| | | Standby Bus to see | |
| | | if it is energized. | |
| | | | |
| | | If the 28 VDC Standby | Replace Relay |
| | | Bus is energized, this | R356. |
| | | indicates that relay | |
| | | R356 did not close | |
| | | correctly when | |
| | | energized. | |
| | | | |
| | | Open the circuit | |
| | | breaker C143, | |
| | | INVERTER CONTROL. | |
| | | | |
| | | Examine the 28 VDC | |
| | | Standby Bus to see if | |
| | | it is energized. | |
| | | | |
| | | If the 28 VDC Standby | Replace Relay |
| | | Bus is not energized, | R356. |
| | | this indicates that | |
| | | relay R356 did not | |
| | | relax correctly when | |
| | | de-energized. | |
| | | | |
2..............…..................…............................…...............1| | | |
|
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24-54-00
ALL ú ú 01 Page 103 ú Jul 15/94
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
STANDBY POWER SYSTEM - ADJUSTMENT/TEST
______________________________________
1. General_______
A. This procedure contains these tasks:
(1)
The operational test of the standby power system
(2)
Operational test of the standby power system (1 mechanic).
(3)
The system test of the standby power system.
B.
The operational tests will make sure that these components of the standby power system operate correctly:
(1)
The static inverter
(2)
The standby power relays (R37 and R328)
(3)
The ac voltage sensor
(4)
The standby power switch.
C.
The system test will make sure that all of the components in the standby power system operate correctly. Use this test after you replace a component or do other maintenance on the standby power system.
D.
You must do the system test after you replace a component or do other maintenance to the standby power system.
TASK 24-54-00-715-002
2. Standby Power System - Operational Test_______________________________________
A. General
(1)
This test uses the GROUND SENSING test switch to put the airplane in the air mode. This makes sure the battery will automatically supply power to the standby buses if the ac buses have no power.
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本文链接地址：737-300 400 500 AMM 飞机维护手册 电源 ELECTRICAL POWER(169)
