Hitachi Hard Disk Drives

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DK512A Jumper Plug Installation

The following jumpers are accessible to the user.

Selecting Sector/Address Mark Found	JP146	9-10
Selecting Bytes/Sector and Sectors/Track	JP285	9-10
Selecting Drives	JP148	1-6
Setting Device Type	JP148	7-10
Setting/Resetting WRITE PROTECTED	JP101	1-4
Setting Motor Start/Stop Option	JP146	11-12

Installing Termination Networks

The termination networks terminate the control signals line (J1). As shipped, one termination network is installed in each drive. Figure 3-1 shows the location.

In star (radial) systems, leave the termination networks in all drives.
In daisy-chain systems, remove the termination networks from all drives except the drive at the end of the daisy-chain.

LED is lit if the drive is selected and READY
Figure 3-1 Jumper Plugs, LED and Network on PC Assembly SZ204

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