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Step 5: Setting The Jumpers - Sony CDU625 User Manual

Cd-rom drive unit
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Step 5: Setting the Jumpers

Set the jumpers on the rear panel of the drive unit in accordance with the
configuration of your computer system.
The jumpers are preset, as illustrated below, at the factory.
PARITY
ID SELECT
0
12
Hardware Installation
TERMINATION
PREVENT/ ALLOW
1
2
TEST MODE
The recommended jumper for use is AMP Shunts (14227-1), JAE Short
Socket (PS-2SH4-1) or equivalent.
The following table shows the function of each pair of jumper pins.
Jumper
Function
ON
Enables the SCSI bus parity check function.
PARITY
OFF
Disables the SCSI bus parity check function.
ID SELECT
Assigns the drive's SCSI ID. Select an ID number
which is not used by other SCSI devices connected
to the bus. ID numbers and corresponding jumper
pin settings are as follows:
Jumper pin settings
ID number
0
0
OFF
1
ON
2
OFF
3
ON
4
OFF
ON
5
OFF
6
ON
7
TERM
OFF
Active terminator OFF
ON
Active terminator ON
ON
The disc drawer can be opened by
PREVENT/
ALLOW
pressing the eject button or by a software
command.
OFF
The disc drawer cannot be opened either
by the eject button or a software
command.
ON
Enables TEST MODE
TEST MODE
OFF
Enables Normal Operation
Notes:
The upper row of pins are ground.
Remove the jumper to set to OFF and install the jumper to set to ON.
ID SELECT, PREVENT/ALLOW, and TEST MODE are
recognized only when the power is turned on or SCSI bus is reset.
TEST MODE is reserved for factory use only. Do not put a jumper on
TEST MODE pins. Doing so may cause an unexpected result.
1
2
OFF
OFF
OFF
OFF
ON
OFF
ON
OFF
OFF
ON
OFF
ON
ON
ON
ON
ON
Factory Settings
Hardware Installation
13

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