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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.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