(f)
Push the LSK adjacent to the -/---/---/-- prompt.
(g)
Make sure the word SAMPLE indication is shown on the line below C/035/350/00.
NOTE: The SAMPLE indication shows the CMC is serviceable.
____ There are three samples of data on the display. Each sample has two lines of 1's and 0's. Bit 32 is the left bit of the first line. Bit 1 is the right bit of the second line.
S 715-032
(2) Do these steps to check the output bus for the Left Aural
Synthesizer card:
(a)
Put C/035/350/00 in the scratchpad.
(b)
Push the LSK adjacent to the -/---/---/-- prompt.
(c)
Make sure bit 13 is 0.
S 715-033
(3)
Do these steps to check the output bus for the Right Aural
Synthesizer card:
(a)
Put C/012/350/00 in the scratchpad.
(b)
Push the LSK adjacent to the -/---/---/-- prompt.
(c)
Make sure bit 13 is 0.
(4)
Do these steps to check the output bus for Master Monitor A card:
S 715-034
NOTE: After you open circuit breakers or change the switch
____ position, permit 10 to 15 seconds for the bit conditions to change.
(a)
Put C/007/350/00 in the scratchpad.
(b)
Push the LSK adjacent to the -/---/---/-- prompt.
(c)
Make sure bits 11 to 22 are 0.
(d)
Set the L IRS switch on the pilot's overhead panel, P5, to OFF.
(e)
Make sure bit 17 is 1.
(f)
Set the L IRS switch on the pilot's overhead panel, P5, to ALIGN or NAV mode.
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31-51-00
ALL ú ú 01 Page 504 ú Oct 10/94
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A
747-400 MAINTENANCE MANUAL
(g)
Open this circuit breaker:
1) P7, Overhead Circuit Breaker Panel
a) 7C01, FMCS FMC L
(h)
Make sure bit 18 is 1.
(i)
Close this circuit breaker:
1) P7, Overhead Circuit Breaker Panel
a) 7C01, FMCS FMC L
(j)
Open this circuit breaker:
1) P7, Overhead Circuit Breaker Panel
a) 7B03, RADIO ALTM L
(k)
Make sure bit 19 is 1.
(l)
Close this circuit breaker:
1) P7, Overhead Circuit Breaker Panel
a) 7B03, RADIO ALTM L
(m)
Open this circuit breaker:
1) P7, Overhead Circuit Breaker Panel
a) 7F25, PSEU SECT 1
(n)
Make sure bit 21 is 1.
(o)
Close this circuit breaker:
1) P7, Overhead Circuit Breaker Panel
a) 7F25, PSEU SECT 1
(p)
Open these circuit breakers:
1) P7, Overhead Circuit Breaker Panel
a) 7C10, FLT CONT ELEC 2L AC
b) 7C11, FLT CONT ELEC 2L DC
c) 7C12, FLT CONT ELEC 1L AC
d) 7C13, FLT CONT ELEC 1L DC
(q)
Make sure bit 22 is 1.
(r)
Close these circuit breakers:
1) P7, Overhead Circuit Breaker Panel
a) 7C10, FLT CONT ELEC 2L AC
b) 7C11, FLT CONT ELEC 2L DC
c) 7C12, FLT CONT ELEC 1L AC
d) 7C13, FLT CONT ELEC 1L DC
(s)
Open this circuit breaker:
1) P7, Overhead Circuit Breaker Panel
a) 7A10, ADC L PWR
(t)
Make sure bit 20 is 1.
(u)
Close this circuit breaker:
1) P7, Overhead Circuit Breaker Panel
a) 7A10, ADC L PWR
(v)
Make sure bits 14 and 20 are 0.
S 715-035
(5) Do these steps to check the output bus for the Master Monitor B card:
NOTE: After you open circuit breakers or change the switch
____ position, permit 10 to 15 seconds for the bit conditions to change.
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