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747-400 MAINTENANCE MANUAL
INTEGRATED DISPLAY UNIT - MAINTENANCE PRACTICES
_______________________________________________
1. General_______
A. This subject has two tasks. The first task is to clean the CRT face of the integrated display unit (IDU). The second task is to clean the air inlet screen at the rear of the IDU.
B. There are six IDUs in the flight compartment. Two IDUs are on the captain's instrument panel. Two IDUs are on the first officer's instrument panel. One IDU is on the center of the instrument panel. One IDU is on the forward electronic panel.
TASK 31-61-02-102-032
2. Integrated Display Unit CRT Cleaning____________________________________
A. Standard Tools and Equipment
(1) Cloth - Clean, lint-free, cotton
B. Consumable Materials
(1) B00032 Glass Cleaner Kit - Safe Clens
C. Access
(1) Location Zone
221 Control Cabin, LH
222 Control Cabin, RH
D. Procedure
S 862-033
(1) Open these circuit breakers:
(a) P7, Overhead Circuit Breaker Panel
1) 7F8, UPR EICAS
2) 7F12, ND L
3) 7F13, PFD L
4) 7F14, LWR EICAS
5) 7F17, ND R
6) 7F18, PFD R
S 162-045
CAUTION:_______DO NOT USE SOLVENT TO CLEAN THE IDU'S CRT. DAMAGE TO THE EQUIPMENT CAN OCCUR.
(2) Remove grease and dirt from the surface of the IDU display screen with the glass cleaner and cloth.
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747-400 MAINTENANCE MANUAL
S 162-037
(3) Remove grease and dirt from the IDU's local light sensor with the glass cleaner and cloth.
NOTE: The local light sensor is on the lower right corner of the
____
IDU.
S 862-038
(4) Close these circuit breakers:
(a) P7, Overhead Circuit Breaker Panel 1) 7F8, UPR EICAS 2) 7F12, ND L 3) 7F13, PFD L 4) 7F14, LWR EICAS 5) 7F17, ND R 6) 7F18, PFD R
TASK 31-61-02-102-041
3. Integrated Display Unit Air Inlet Screen Cleaning
_________________________________________________
A. Standard Tools and Equipment
(1) Vacuum Source
B. References
(1) AMM 31-61-02/401, Integrated Display Unit
C. Access
(1) Location Zone
221 Control Cabin, LH
222 Control Cabin, RH
D. Procedure
S 022-042
(1) Remove the IDU (AMM 31-61-02/401).
(a) Put the IDU on a stable surface.
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(2) S 162-043Remove all dirt from the inlet screen with a vacuum source.
NOTE:____ The inlet screen is found at the rear of the IDU.
(3) S 422-044Install the IDU (AMM 31-61-02/401).
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