AT&T 3B2/300 Technical Reference Manual page 558

- - - - - - - - - - - - - - - - - - - - - - - - - - - FUNCTIONAL DESCRIPTION
AT&T/XM
DEVICE
+SY, +!2Y
CONNECTOR 3
DEVICE
+SY, +12Y
CONNECTOR 2
-
DEVICE
+SY, +12Y
CONNECTOR 1
POWER ON
+SY
INDICATOR
-
3B2/400 COMPUTER
HARD
+SY, +12Y
DISK
DRIVE D
HARD +SY, +12Y
DISK
DRIVE 1
CM194B
+SY, +12Y
BACKPLANE
-
L
+SY, +12Y, -12Y
-
SYSTEM
-
BOARD
+3.3Y, -
+3.9Y
-12Y
-
I
I
+3.9V
I
BATTERY
"
"
POWER
"....._
SUPPLY
V
'
...
llSYAC
OR 220YAC
' /
COMMERCIAL
AC LINE
+SY, +12Y CARTRIDGE
-
TAPE -
DRIVE
+SY, +12Y
FLOPPY
DISK
DRIVE
+SY
"Diagnostic"
INDICATOR
+SY
"Power" ON
INDICATOR
-
POWER
SUPPLY
u
llSYAC
OR 220YAC
,
...
_______
/
COMMERCIAL
AC LINE
+sY
-
J
POWER
CONTROL
OUTPUT
FOR NEXT
MODULE
POWER
CONTROL (+SY)
+SY
+SY
Figure 3-97: 3B2/400 Computer and AT&T/XM Power - Functional Block Diagram
FUNCTIONAL DESCRIPTION 3-305