IBM 8479 Hardware Maintenance Manual - Page 47

System, board, external, connectors, jumpers

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System board external connectors The following illustration identifies system board connectors for external devices. Mouse Keyboard Parallel Serial 1 Serial 2 Ethernet USB 1 USB 2 Line out Line in Mic MIDI System board jumpers The following illustration identifies the jumpers on the system board. 1 2 3 CMOS jumper (JBAT1) Boot block jumper 3 2 1 Boot block jumper (JROM1) For normal operations of the system, a jumper is installed on pins 2 and 3 of the boot block jumper. Note: The boot block jumper (JROM1) should only be removed by an IBM authorized service representative. CMOS jumper Installing options 39

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System
board
external
connectors
The
following
illustration
identifies
system
board
connectors
for
external
devices.
Mouse
Keyboard
Parallel
Serial 1
Serial 2
USB 2
USB 1
Mic
MIDI
Line in
Line out
Ethernet
System
board
jumpers
The
following
illustration
identifies
the
jumpers
on
the
system
board.
CMOS jumper
(JBAT1)
Boot block jumper
(JROM1)
1
1
2
2
3
3
Boot
block
jumper
For
normal
operations
of
the
system,
a
jumper
is
installed
on
pins
2
and
3
of
the
boot
block
jumper.
Note:
The
boot
block
jumper
(JROM1)
should
only
be
removed
by
an
IBM
authorized
service
representative.
CMOS
jumper
Installing
options
39