HP 3000 9x9KS Service Manual page 226

Connector/
Function
Pin Set
J1 1-3 TermPower to
SCSI Bus
J2 1-2 Reserved
3-4 Reserved
5-6 Parity Disable
7-8 Write Protect
9-10 Enable Motor
Start
11-12 Delay Motor
Start
13-14 Reserved
15-16 Reserved
17-18 Reserved
J4 1 SCSI ID 0
2 Fault LED
3 SCSI ID 1
4 Vendor unique
5 SCSI ID 2
6 Spindle Sync
7 SCSI ID 3
8 Unit Active
LED
9 Enable Term.
10 Ground
11 (+) 5 Volts
12 No connection
13-20 Reserved
8-38 SCSI and I/O
Table 8-18 A3351A Configuration Jumper Descriptions
Open: Drive does not supply term power to SCSI bus pin 26.
Jumpered: Drive supplies termination power to SCSI bus pin 26. (Default)
Leave open.
Leave open.
Open:Parity checking and reporting by the drive enabled. (Default)
Jumpered: Drive does not report the results of pairyt checking to the host.
Open: Drive is not protected (Default) .
Jumpered: Drive is write-protected.
Open:Spindle start immediately after power-up. (Default)
Jumpered: Drive spindle does not start until Start Command is received
from the host.
Open:Motor start is controlled by Enable Motor Start setting. (Default)
Jumpered: Spindle startup is delayed by SCSI ID times 12 after power is
applied.
Leave open.
Leave open.
Leave open.
Provides connerction (with Gnd, pin10) for remote SCSI ID 0 select.
Open=0.
Provides output for fault LED signal.
Provide connection (with Gnd, pin 10) for remote SCSI ID 1 select. Open=0.
Not used.
Provide connection (with Gnd, pin 10) for remote SCSI ID 2 select. Open=0.
Provides spindle sync signal SSREF oputput.
Provide connection (with Gnd, pin 10) for remote SCSI ID 3 select. Open=0.
Provides output (neg) for drive action LED
Not used on differential drives.
Provides signal for signal ground.
Provides connection for +5 volts.
Function Description