Specifications
Page 20 Installation Instructions: AM-137 Board AM-1600/1400 Upgrade
9.0SCSI BUS TERMINATION
The high-performance SCSI bus on the AM-137 board must be terminated at each end.
The AM-137 board provides termination at one end of the bus and the opposite end of
the bus must also be terminated. This can be done by installing terminators in the SCSI
peripheral located farthest down the cable away from the AM-137 board or by using an
external terminator. Your desktop AM-137 installation kit includes an external terminator
(PRA-00222-00). The external terminator plugs directly into the external connector
located on your computer’s rear panel. In order to use the external terminator, all SCSI
peripherals inside your computer must have their terminators removed. Deskside
systems already have external terminators installed.
To insure the SCSI bus is properly terminated at the AM-137 end of the bus, the
AM-137’s W6 active SCSI termination jumper must always be set in the
enabled
position.
Because the desktop computer has such a short SCSI interface cable, they could be
operated with only the termination supplied by the CPU board. It was not necessary to
terminate the opposite end of the SCSI bus. However, once you install an AM-137
board, your computer will not boot unless both ends of the SCSI bus are
terminated. See Appendix A for more details.
10.0SSD AND BOOT PROM IC HANDLING
The type of socket used for SSD and boot PROM ICs on the AM-137 board requires a
special IC removal tool. See the illustration below for more information:
The SSD and boot PROM
ICs on the AM-137 board
require a specialized tool
for their removal. If you
attempt to remove the
SSD chip or boot
PROM using a
screwdriver or
pocketknife, you
could easily damage
both the chip and the
socket. This type of chip
extraction tool is available
at retail stores specializing
in electronic components.
WARNING!
MC1206
AM-137 Boot PROM Removal
PDI-00137-50, Rev. A01