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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A 737-300/400/500MAINTENANCE MANUAL
EADI (EXAMPLE)
CRT Brightness Test
Figure 201
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A50384
A
737-300/400/500MAINTENANCE MANUAL
S 112-010
(5) Remove unwanted materials from the CRT face.
S 862-037
(6) Make sure these circuit breakers are closed: (a) P6 Circuit Breaker Panel 1) F/O EADI 2) F/O EHSI 3) EFIS CONT PANEL R 4) EFIS SYM GEN R 5) LANDING GEAR AIR/GND RELAY & LIGHTS (b) P18 Circuit Breaker Panel 1) CAPT EADI 2) CAPT EHSI 3) EFIS CONT PANEL L 4) EFIS SYM GEN L 5) FMCS CMPTR 6) CDU NO. 1 7) CDU NO. 2 8) MODE ANN (or FMCS BITE)
S 862-048
(7) Make sure the EFI transfer switch on the pilots' overhead panel, P5, is in the NORMAL position.
S 862-038
(8) Permit 10 minutes for the CRT to become warm.
S 862-039
(9) On the left and right EFIS control panels, set the mode switches to the PLAN position.
S 862-040
(10)
On the left and right EFIS control panels, turn the four BRT controls in the fully clockwise position.
S 742-049
(11)
Push the INIT/REF key on the FMCS CDU.
S 742-050
(12)
Push the line select key (LSK) 6L (<INDEX) on the FMCS CDU.
S 742-051
(13)
Push the LSK 6R (MAINT>).
(a) Make sure the FMCS CDU display shows the MAINT BITE INDEX 1/1 page
S 742-052
(14) Push the LSK 5L (<EFIS).
(a) Make sure the FMCS CDU display shows the EFIS BITE TEST page.
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737-300/400/500MAINTENANCE MANUAL
S 742-053
(15)
Push the LSK 3L (<SELF TEST).
S 752-042
(16)
Make sure the applicable PLAN mode test pattern shows on the EADI and EHSI displays.
E. CRT Brightness Test
S 862-013
CAUTION: DO NOT ALLOW THE PHOTOMETER TEMPERATURE TO BECOME MORE THAN
_______ 150°F. DO NOT PUT THE PHOTOMETER DIRECTLY IN THE SUNLIGHT. THE PHOTOMETER IS SENSITIVE TO HEAT AND LIGHT. EQUIPMENT DAMAGE CAN OCCUR.
(1) Energize the hand-held photometer.
(a)
Make sure that the battery operates correctly.
(b)
Make sure that the meter is adjusted for a correct meter-zero value.
S 862-014
(2)
Attach the micro-reader probe to the photometer.
S 862-015
(3)
Turn the swivel head so that the probe and digital display point in opposite directions.
S 862-016
(4)
Hold the probe against the CRT face so that it is in the center of the area to be measured.
S 862-017
(5)
Push the ON switch for 15 seconds or until the digital display value becomes stable.
S 862-018
(6)
With the ON switch pushed in, move the probe around the area to be tested until there is a maximum stable value.
NOTE: Make sure that the CRT face is not in the direct sunlight.
____
S 972-019
(7)
Write the value on Table I.
S 862-020
(8)
Repeat this procedure until there are three values for each area to be tested.
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