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SN'
5 - 1 and Figur<>
F i gure
rial and para l l e l ports ( ea r l ier processor units ) .
Not e :
When replacing the CRT display unit and bridge assemb l y , the
bridge
must
be
printer/plotter .
3 .
P l ace the CRT display unit and bridge assembly on the processor unit
over the bridge mounting ho les and secure it to the processor unit
by tightening the four knur led thumb screws on the bridge . See Figure
5 - 2 .
4 .
Reconnect the CRT display cab l e , the keyboard connector , the main
power cord , and any other connector that was attached to the IBM
900 1 . See Figure
5 .
Pos i t ion the IBM 9001 power switch to ON and do an operational check
of the system .
5 . 2
P R I N TER/PLOTTER CONTROL BOA R D
The printer/plotter control board is located i n the processor unit above
the planar board and any feature boards that may be ins t a l led.
5 - 5 .
Note :
Systems that do not have the printer/plotter feature have a feed
through board instead of a printer/plotter control board.
moval and rep lacement procedures apply to both boards .
PRINTER/PLOTTER CONTROL BOARD
FEATURE BOARD
FEATURE BOARD
FEATURE BOARD
FEATURE BOARD
FEATURE BOARO
PLANAR BOARD
5 - 5 .
Figure
Processor Unit ( S ide View)
5 - 3 .
Replace the eight s c rews
placed
over
the
5 - 1 .
POWER
SUPPLY
Location For
MMU Board
Installed)
!When
Removal and Replacement Procedures 5 - 6
tractor
drive
shaft
The same re
PRINTER
L i l <'
0 1 1
s e
on
the
See Figure
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