NOTE: Conductive dust caps and connector
____ covers are black or grey in color.
(a)
ITT Cannon - as applicable (stamped "CONDUCTIVE") ~............................................... | PART NUMBER | MARKING ON CAP | CONNECTOR | ................................................. | 025-1155-001 | BKAD1-A&B-R | BKAD1-A-R | | | | BKAD1-B-R | ................................................. | 025-1156-001 | BKAD1-C-R | BKAD1-C-R | ................................................. | 025-1157-001 | BKAD2&3-A&B-R | BKAD2-A-R | | | | BKAD2-B-R | | | | BKAD3-A-R | | | | BKAD3-B-R | ................................................. | 025-1158-001 | BKAD2&3-C-R | BKAD2-C-R | | | | BKAD3-C-R | 2...............…..................…............1
(b)
Souriau - as applicable ~............................................... | PART NUMBER | TYPE CONNECTOR | SHELL SIZE | ................................................. | 8660-1404 | Power | 1 | ................................................. | 8660-1405 | Signal | 1 | ................................................. | 8660-1406 | Power | 2 & 3 | ................................................. | 8660-1407 | Signal | 2 & 3 | 2..............…..................….............1
(4)
Anti-static dust caps and connector covers
(alternate when conductive caps and covers not
available)
(a) Plastic dust caps and connector covers that have an anti-static solution applied and are dated.
B.
Metal Encased Units with ESDS Placards-Installation Handling
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
20-41-02
ALL ú ú 01 Page 210 ú Feb 15/99
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL
S 862-069
CAUTION:_______ MAKE SURE YOU KEEP CONTAMINATION OR UNWANTED MATERIAL AWAY FROM
THE SENSITIVE DEVICE. CONTAMINATION OR UNWANTED MATERIAL NEAR
THE SENSITIVE DEVICE CAN CAUSE A MALFUNCTION IN THE SENSITIVE
DEVICE.
(1) Remove the system electrical power with the applicable Removal/Installation procedure.
S 722-074
WARNING: USE A WRIST STRAP WITH A MINIMUM GROUNDING LEAD RESISTANCE OF
_______ 250 KILOHMS AND A MAXIMUM OF 1.5 MEGOHMS. USE OF A LOW RESISTANCE WRIST STRAP CAN CAUSE INJURY TO PERSONS IF A HIGH VOLTAGE SOURCE IS TOUCHED
(2) Do these steps to do a test of the wrist strap resistance:
(a) Use an ohmmeter to make sure the wrist strap assembly has a minimum resistance of 250 kilohms and a maximum of 1.5 megohms.
CAUTION: THE GROUNDING LEAD ON THE WRIST STRAP MUST TOUCH THE SKIN
_______ TO GIVE THE PROTECTION THAT IS NECESSARY. FAILURE TO USE THE WRIST STRAP CORRECTLY CAN CAUSE DAMAGE TO THE ESDS METAL ENCASED UNIT.
(b)
Put the strap on the wrist of the person that will remove the device.
(c)
Use an ohmmeter to make sure the resistance is less than 10 megohms.
S 942-076
(3)
Connect the strap to an applicable electrostatic ground jack.
S 432-031
(4)
Remove all of the conductive dust caps and the connector covers from the unit to be installed.
NOTE: Make sure you do not touch the electrical pins.
____
S 422-032
(5) Install the ESDS unit with the applicable Removal/Installation procedure.
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20-41-02
ALL ú ú 01 Page 211 ú Feb 15/99
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
S 082-078
(6) Remove the strap.
TASK 20-41-02-002-041
6. Wire Integration Unit (WIU) Covers - Removal
____________________________________________
A. Standard Tools and Equipment
(1)
Wrist Straps - (Commercially Available)
B.
Procedure
S 862-064
CAUTION: MAKE SURE YOU KEEP CONTAMINATION OR UNWANTED MATERIAL AWAY FROM THE
_______ SENSITIVE DEVICE. CONTAMINATION OR UNWANTED MATERIAL NEAR THE SENSITIVE DEVICE CAN CAUSE A MALFUNCTION IN THE SENSITIVE DEVICE.
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