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757 MAINTENANCE MANUAL
 D. Do the Operational Test of the DC Generation System
 S 865-010
 (1)  
Push the ELEC HYD switch on the EICAS MAINT panel on the right side panel, P61.
S 865-011
 (2)  
Do these steps at the standby power control panel on the pilots' overhead panel (P5):
 (a)  
Make sure the STBY POWER switch is in the AUTO position.
 (b)  
Make sure the ON light in the BAT switch is on.
 (c)  
AIRPLANES WITH 30-MINUTE STANDBY POWER;
 Make sure the DISCH light is off.
 (d)  
AIRPLANES WITH EXTENDED STANDBY POWER; Make sure the MAIN BAT DISCH and the APU BAT DISCH lights are off.
 (e)  
Make sure the standby bus OFF light is off.
 S 215-012
 (3) Make sure these DC-V values show on the bottom EICAS display:
 (a)  
L = 28 |2
 (b)  
R = 28 |2
 (c)  
STBY/BAT = 28 |2
 (d)  
APU/BAT = 28 |2
 S 215-013
 (4)  Make sure these DC-A values show as positive and not zero on the bottom EICAS display:
 (a)  
L
 (b)  
R
 S 215-014
 (5)  Make sure these values show below STBY/BAT on the bottom EICAS display:
 (a)  AC-V = 115 |5
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757 
MAINTENANCE MANUAL
 (b)  FREQ = 400 |5
 S 215-015
 (6)  
Make sure these EICAS messages do not show on the top EICAS display:
 (a)  
STANDBY BUS OFF
 (b)  
BATTERY OFF
 (c)  
MAIN BAT DISCH
 (d)  
AIRPLANES WITH EXTENDED STANDBY POWER;
 APU BAT DISCH
 (10)
 Turn the STBY POWER switch on the P5 panel to the AUTO position.
S 215-386
 (11)
 Push the BAT switch on the P5 panel to the ON position and do a check as follows:
 (a)  
Make sure the amber OFF light in the switch is off.
 (b)  
Make sure the EICAS message, BATTERY OFF, does not show on the upper display.
 S 215-382 
 (7)  Make sure the EICAS messages do not show on the lower display: (a) STBY INVERTER (b) MAIN BAT CHGR (c) AIRPLANES WITH EXTENDED STANDBY POWER; APU BAT CHGR 
 APU BAT NO STBY 
 S 215-383 
 (8)  Turn the STBY POWER switch on the P5 panel to the OFF position and do a check as follows: 
 (a) (b)  Make sure the EICAS message, STANDBY BUS OFF, shows on the upper display.Make sure the standby bus OFF light on the P5 panel is on. 
 S 215-384 
 (9)  Push the BAT switch on the P5 panel to the OFF position and do a check as follows: 
 (a) (b)  Make sure the amber OFF light in the switch is on.Make sure the EICAS message, BATTERY OFF, shows on the upper display. 
 S 865-385
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