Jumpering - HP 3000 9x9KS Service Manual

Jumpering

The drive options and SCSI address are set on J3 (see Figure 8-7 ). Table 8-14 on page 8-28 shows the pin-
sets for the available options.
The SCSI address can also be set on the option connector located next to the SCSI cable connector and the
power connector (see ) .
Pin-set
1-2 SCSI ID 3
3-4 SCSI ID 2
5-6 SCSI ID 1
7-8 SCSI ID 0
9-10 FLT LED/Blank
11-12 GND/Delay Spin
13-14 Not supported
15-16 SPINDLE_SYNC_REFL
17-18 +5 VDC OUT
19-20 Write Protect
21-22 Stagger Spin
23-24 Enable Narrow Mode
25-26 Not supported
27-28 Not supported
29-30 Not supported
31-32 Not supported
8-28 SCSI and I/O
Table 8-14 J3 Option Jumpers
Function
SCSI ID bit 3. Open = O, Jumpered = 1
SCSI ID bit 2. Open = O, Jumpered = 1
SCSI ID bit 1. Open = O, Jumpered = 1
SCSI ID bit 0. Open = O, Jumpered = 1
Active low connection for cathode of fault status LED
(used with pin 18)
Jumpered = Spin Delay is enabled
-
Provides connection for Spindle Sync REF signal
Pin 17: +5VDC out.
Pin 18: Active low connection for cathode of busy LED .
Jumpered = Write Protect is enabled
Jumper - Staggered Spin is enabled
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Configuration