AT&T 3B2/300 Technical Reference Manual page 561

FUNCTIONAL D E S C R I P T I O N - - - - - - - - - - - - - - - - - - - - - - - - - -
3B2/300/310 POWER SUPPLY
,..----------,
115 VAC
: VOLTAGE
'-'- I
HARD DISK 0
r,,
I
CONNECTOR
I SELECT
I 220 VAC
I JUMPER
/
+12 VDC
I I
-
Bl (YELLOW)
1
l
I I
GROUND
L------ ___ .J
B2 (BLUE)
GROUND
B3 (BLUE)
110 VAC
+5 VDC
OR
lOA FUSE AND
B4 (RED)
220-240 VAC
LINE FILTER
FLOPPY DISK
10.6 VDC CONNECTOR
I
FAN
(SEE NOTE)
+12 VDC
(INTERNAL)
-
-
Cl (YELLOW)
-
GROUND
NOTE:
EARLY VERSION
POWER C2 (BLUE)
USED 115 VAC FAN
SUPPLY
GROUND
SET
C3 (BLUE)
+SVDC
C4 (RED)
SYSTEM BOARD
CONNECTOR
+12 VDC
-
A3 (YELLOW)
-12VDC
A4 (ORANGE)
GROUND
AS (BLUE)
GROUND
A8-Al 1 (BLUE)
+5 VDC
A12-A15 (RED)
ON
PWRON[l)
(BROWN)
A7--,
ON/STANDBY
I
SWITCH
STANDBY
I
(MOMENTARY)
A6
--I
(GRAY)
RESET
Al (VIOLET)
RESET
SWITCH
GROUND
(MOMENTARY)
AZ (VIOLET)
Figure 3-98: 3B2/300 and 310 Computer Power Supply - Functional Block Diagram
3-308 TECHNICAL REFERENCE MANUAL