AT&T 3B2/300 Technical Reference Manual page 564

- - - - - - - - - - - - - - - - - - - - - - - - - - - FUNCTIONAL DESCRIPTION
3B2/500 POWER SUPPLY
HARD DISK 0
110 VAC CONNECTOR
OR
220-240 VAC
+12 VDC
-
Bl (YELLOW)
GROUND
B2 (BLUE)
GROUND
B3 (BLUE)
POWER
XMRTN
CONTROL
+SVDC
-
B4 !REDl
+5 VDC
JACK
-
FLOPPY DISK
CONNECTOR
CM520A
+12 VDC
BACKPLANE
Cl (YELLOW)
RQRSTO
GROUND
C2 (BLUE)
(VIOLET) Al
GROUND
POWER GROUND
(VIOLET) A2
SUPPLY
C3 (BLUE)
+SVDC
+12VDC
SET
(YELLOW) A3
C4 (RED)
-12VDC
(ORANGE) A4
GROUND
BRIDGE
(BLUE) AS
PDWNRQO
CONTROLLER
(GRAY) A6
PWRON!
+12 VDC
DI (YELLOW)
-
(BROWN) A7
GROUND
GROUND
D2 (BLUE)
(BLUE) AB
GROUND
GROUND
(BLUE) A9
D3 (BLUE)
THSDNO
(WHITE) AIO
+SVDC
D4 (RED)
CM5ZUA CARTRIDGE
BACKPLANE
TAPE DRIVE
SWIRE
CONNECTOR
-
vrr
(RED)
-
+12 VDC
6WIRE
-
El (YELLOW)
r:RnTTNn
-
(BLUE)
GROUND
E2 (BLUE)
GROUND
E3 (BLUE)
+5 VDC
-
E4 (RED)
ON/STANDBY ON
SWITCH
(TOGGLE)
STANDBY
CARTRIDGE
TAPE DRIVE
CONTROLLER
+12 VDC
Fl (YELLOW)
-
GROUND
F2 (BLUE)
RESET
RESET
GROUND
SWITCH F3 (BLUE)
(INTERNAL TO
+5 VDC
-
F4 (RED)
POWER SUPPLY) GROUND
Figure 3-100: 3B2/500 Computer Power Supply - Functional Block Diagram
FUNCTIONAL DESCRIPTION 3-311