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 DC-V = 25 |2
 5) Turn the STBY POWER switch on the P5 panel to the AUTO
 position.
 6)  Make sure the yellow DISCH light on the P5 panel goes off.
 7)  Make sure the value that follows is below STBY/BAT on the
 bottom EICAS display:
 DC-A = 38 |5
 8)  Make sure the DC-V value below STBY/BAT increases to 33 |4 on the bottom EICAS display.
 NOTE:____The main battery is in a charge cycle. A charge cycle of one to five minutes is usual, but a fully discharged battery requires 75 minutes to charge.
 9)  Make sure the DC-A value below STBY/BAT decreases from 38 |5 to 0 |5 in less than two seconds.
 NOTE: If more than two seconds is required for the DC-A
____ value to decrease to 0 |5, there is a failure in the battery charger or its external circuit.
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

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MAINTENANCE MANUAL

 10) Make sure the DC-V value below STBY/BAT is 28 |2 on the bottom EICAS display.
 11) Push the STATUS switch on the EICAS display select panel on the forward electronics panel, P9.
 12) Make sure the EICAS message, MAIN BAT CHGR, does not show on the bottom display.
AIRPLANES WITH EXTENDED STANDBY POWER;
 Do the Main, APU Battery Chargers and Current Monitor test as
 follows:
 1)  Turn the STBY POWER switch on the P5 panel to the BAT position.
 2)  Make sure the yellow MAIN BAT DISCH and APU BAT DISCH lights on the P5 panel come on.
 3)  Make sure the EICAS messages, MAIN BAT DISCH and APU BAT DISCH, show on the top display.
 4)  Make sure the values that follow show on the bottom EICAS display:
 5)  STBY/BAT: DC-V = 25 |2
 6)  APU/BAT: DC-V = 25 |2
 7)  Turn the STBY POWER switch on the P5 panel to the AUTO position.
 8)  Make sure the yellow APU BAT DISCH and MAIN BAT DISCH lights on the P5 panel go off.
 9)  Make sure the values that follow show on the bottom EICAS display.
 STBY/BAT: DC-A = 38 |5
 APU/BAT: DC-A = 38 |5
 10) Make sure the DC-V values below STBY/BAT and APU/BAT increase to 33 |4 on the bottom EICAS display.
 NOTE:____The main and APU batteries are in a charge cycle. A charge cycle of one to five minutes is usual, but a fully discharged battery requires 75 minutes to charge.
 11) Make sure the DC-A values below STBY/BAT and APU/BAT decrease from 38 |5 to 0 |5 in less than two seconds.
 NOTE: If more than two seconds is required for the DC-A
____ value to decrease to 0 |5 there is a failure in the battery charger or its external circuit.
 The DC-A values below STBY/BAT and APU/BAT do not have to decrease at the same time.
 12) Make sure the DC-V values below STBY/BAT and APU/BAT are 28 |2 on the bottom EICAS display.
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
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MAINTENANCE MANUAL

 13) Push the STATUS switch on the EICAS display select panel on the forward electronics panel, P9.
 14) Make sure the EICAS messages, MAIN BAT CHGR, APU BAT CHGR and APU BAT NO STBY, do not show on the bottom display.
 (l)  
Open the 6K16 AC STBY BUS PWR circuit breaker on the main power distribution panel (P6).

 (m)  
Make sure the yellow OFF light next to the standby power switch is off.

 (n)  
Make sure the EICAS message STANDBY BUS OFF does not show on the upper display.

 (o)  
Open the 6D10 INV PWR TRU circuit breaker on the main power distribution panel (P6).

 (p)  
Make sure the yellow OFF light next to the STBY PWR switch comes on.

 (q)  
Make sure the EICAS message STANDBY BUS OFF shows on the upper display.

 (r)  
Turn the STBY PWR switch to the BAT position.

 (s)  
Make sure the yellow OFF light next to the STBY PWR switch goes off.
　
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