NEC POWERMATE VE - SERVICE MANUAL 08-1996 Service Manual page 142

Jumper A
Audio Connector
Figure D-1 CD-ROM Connector and Jumper Locations
To the left of the standard 40-pin IDE connector on the back of the CD-ROM reader are
two 6-pin jumper blocks (jumper A and jumper B). The block to the extreme left (jumper
A) is factory set with the pins unshorted (see Table D-2).
Pin
1
2
3
The jumper block immediately adjacent to the IDE connector (jumper B) sets the following
functions using pin 1 - pin 3 as read from left to right: CSEL, SL, and MA (see Table D-3).
The following is a summary of the jumper settings:
T
CSEL. (cable select) — enables/disables the cable select feature. Factory set at
disabled (pin not jumpered).
T
SL (slave) — enables/disables the slave feature. Factory set at disabled (pin not
jumpered)
T
MA (master) — enables/disables the master feature. Factory set at enabled (pin
jumpered)
CD-ROM Reader Specifications and Jumper Settings
Jumper B
(Cable Select/Master/Slave)
IDE Connector
Table D-2 Jumper A Settings
Setting
Disabled (unshorted)
Disabled (unshorted)
Disabled (unshorted)
Power Connector
Signal
–
Factory use only
Factory use only
D-3