Gigabyte PCU31 Schematics
5
D D
VRP1
VRP2
VRP3
C C
+12V
R1
7.5K/6/1
R2
48.7K/6/1
C4
8.2K/6
C2
0.1U/6/Y/25V/X
3
vref
2
4
+12V
+
-
R18
1K/6
84
U1A
1
LM358/SO8
R3
1K/6
R4 0/6S/X
C3
1U/6/X/50V/X
2
1
3
Q1
APEC 3310H /TO-252
EC2
200U/D/16V/8E
+12V
C1
1U/6/Y/16V/X
+
3
FAN_PWR
12
R8
82/6/X
D15
LED/S/X
12
2
R9
82/6
D3
LED/S
12
R10
82/6/X
D17
LED/S/X
12
R11
82/6/X
D5
LED/S/X
+5V
12
R12
82/6
D19
LED/S
12
R13
82/6
D7
LED/S
12
1
R14
82/6/X
D21
LED/S/X
12
R15
82/6
D9
LED/S
VR=0~100K
vref=12v*(100k-VR+R2)/[(VR+R1)+(100K-VR+R2)]
K1
K1/X
K2
1
1
K2/X
K3
1
1
K3/X
K4
1
1
K4/X
1
1
FOR FAN VOLTAGE = 4.0V, R2 = 48.7K/6/1 Used for PCU31, mount LM358(TI/ Philips/ NS/ UTC)
FOR FAN VOLTAGE = 5.0V, R2 = 68K/6/1 Used for PCU21, mount LM358(TI/ NS)
VR
VRP1 FAN_PWR
1
VRP2
B B
2
3
11NH5-040103-03
VRP3
FAN_POWER
1
GND
2
11NH5-040102-03
GND
POWER INPUT
+5V
+12V
4.7U/8/Y/10V
FDD Power Conn
(Vertical)
C6
2 1
C5
2.2U/8/Y/16V
2 1
PWR
1
2
3
4
FAN1X4P
旋轉
改上
angle
180
right
4
度，
Title
Size Document Number Rev
B
3
2
Date: Sheet of
FAN Voltage control & LED
GH-PCU31-VH
2 2Wednesday, March 10, 2004
1
1.0
GIGABYTE
TOP View
2 4
1
3
+5V
GND
A A
GND +12V
FDD power connector
physical package
5
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