IBM 6151 Maintenance And Service Manual page 419

2. Carefully remove the option from its antistatic bag. Be sure to
grasp circuit boards by the edges only; do not touch the
component pins or solder joints. Grasp diskette drives by their
frames to avoid touching the electronics board.
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3. When inserting an option adapter into the system board, hold
the adapter by its top edge or upper corners.
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(6/88) Removal and Replacement 4-9