(b)
Put the wrist strap on your wrist.
(c)
Use an ohmmeter to make sure the resistance is less than 10 megohm.
S 492-004
(3) Connect the wrist strap into the ELECTROSTATIC GROUND JACK of the card file.
S 862-005
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 PRINTED CIRCUIT BOARDS.
(4) Attach the wrist strap correctly on the person that will remove the printed circuit board.
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A 737-300/400/500MAINTENANCE MANUAL
S 012-006
(5)
Open the access door on the card file.
S 032-007
(6)
From the location decal, find the printed circuit board to be removed.
S 022-008
(7)
Use the top and bottom (or left and right) extractors on the printed circuit board to remove it from the card file.
S 022-033
(8)
Put the printed circuit board in the conductive bag or the container with the ESDS placard.
S 022-034
CAUTION: DO NOT USE STAPLES OR ADHESIVE TAPES TO CLOSE THE CONDUCTIVE
_______ BAGS. FAILURE TO CLOSE THE CONDUCTIVE BAGS CORRECTLY CAN CAUSE DAMAGE TO THE PRINTED CIRCUIT BOARD.
(9) Use an ESDS or a 100% cotton twine to close the conductive bag.
NOTE: The printed circuit boards in a conductive bag must be put in
____ a rigid container to make sure the conductive bag stays in a satisfactory condition.
S 412-035
(10)
Close the access door to the card file.
S 092-036
(11)
Disconnect the wrist strap from the ELECTROSTATIC GROUND JACK.
TASK 20-40-12-402-013
3. ESDS Printed Circuit Boards Installation
________________________________________
A. Equipment
(1)
Conductive Bags - 3M type 2100
(2)
Conductive Plastic Carrier - Electrical Insulation Suppliers PCC-700
(3)
Ohmeter
(4)
Wrist Straps - 3M 2066 or 2067
(5)
100% Cotton Twine - Commercially Available
(6)
ESDS Labels
(a)
JEDEC International Label - multi-source
(b)
3M - No. 7102
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A
737-300/400/500MAINTENANCE MANUAL
B. Install the Printed Circuit Boards with a STATIC SENSITIVE Placard
S 862-014
(1) Remove the system electrical power with the applicable procedure.
S 492-015
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.
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