I Noise Suppression Devices - IBM 6400 Maintenance Information Manual

I
Noise Suppression Devices
Ferrite noise suppressors are installed in the printer to reduce radio frequency
interference (RFI) to and from electronic equipment located near the printer.
Two kinds of ferrite noise suppressors are used:
1. Shielding Bead: a cylindrical core, through and around which the control
panel cable assembly is wound. Two are required.
2. Ferrite Clamp: a noise suppression core in a hinged plastic case and
attached to the wall of the card cage with adhesive. The parallel I/O cable
assembly passes through this core.
Figure 58 shows how these devices are installed.
Duplicate the number of turns around the shielding beads when
installing or replacing the control panel cable. See Figure 58.
IMPORTANT
365