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Opening the Computer
1 If your computer has its rear side covered by a plastic panel attached
with plastic hook pad, pull it off.
2 Remove the cover mounting screws.
3 Remove the cover of the computer.
Installing the Drive Unit into the Computer 11
Remove the jumper to set to OFF, and install the jumper to set to ON.
The recommended jumper is AMP* Shunts (14227-1), JAE** Short
Socket (PS-2SH4-1) or equivalent.
The following table shows the function of each jumper.
Notes:
● The upper row of pins (without KEY position) is ground.
● ID SELECT, PREVENT/ALLOW, and TEST MODE are
recognized when the power supply is turned on or SCSI bus is reset.
● TEST MODE is used exclusively for the factory testing. Do not set
TEST MODE to ON. Doing so may cause an unexpected result.
* AMP is a registered trademark of AMP, Inc.
** JAE is a registered trademark of Japan Aviation Electronics Industry, Ltd.
10 Installing the Drive Unit into the Computer
Jumper
DEVICE
TYPE
ID SELECT
ID number
0
1
2
3
4
5
6
7
Jumper settings
0
OFF
ON
OFF
ON
OFF
ON
OFF
ON
1
OFF
OFF
ON
ON
OFF
OFF
ON
ON
2
OFF
OFF
OFF
OFF
ON
ON
ON
ON
KEY
PREVENT/
ALLOW
TEST MODE
Used to prevent the SCSI bus interface connector
from being plugged in upside down.
ON: Allows insert and removal of a CD caddy
with the eject button and the eject
command.
OFF: Prevents insert and removal of a CD
caddy with the eject button or an eject
command.
ON: Enables test mode.
OFF: Enables normal operation.
Function
The setting of this jumper determines whether the
SCSI device type code in the inquiry data is WO
or CD-ROM.
ON: WORM
OFF: CD-ROM
Assign the drive unit’s ID number by setting these
jumpers to ON or OFF. Do not assign the same
number as one used for other SCSI device.
Factory settings