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5
5
4
4
3
3
2
2
1
1
D D
C C
B B
A A
SCL
SDA
FAN1_E
FAN2_B
V12
GND
SCL
SDA
VDD_F
VDD_F
V12
VDD_F
VDD_F
V12
VDD_F
VDD_F
V12
VDD_F
VDD_F
FAN1_B
FANSPIN4
32.768KHZ
FAN1_P
FANSPIN1
SCL
SDA
32.768KHZ
FANSPIN2
FAN1_E
FAN1_B
FANSPIN1
FAN1_P
FAN4_P
FANSPIN4
FAN4_P
FAN2_P
FANSPIN2
32.768KHZ
FAN2_P
SDA
SCL
Title
Size Document Number Rev.
Date: Sheet of
Project Code
Reviewed By Approved By
Prepared By
Model Name
PCB P/N
PCB Rev.
Benq Corporation
OEM/ODM Model Name
99.J8677.B12-C3-304-002
FAN BOARD
33
ANGEL HU JACK CHEN
48.J8613.S02 S02
KEN JA CHEN
<Size>
PB610099.J8677.001
0
Wednesday, August 06, 2003
ODM
Crystal generate the clock for fan control IC.
2 fan speed control and 2 thermal sensor detect IC
Thermal sensor
Fan control IC
C519 220P J
C502
10P J
Q504
2N3904
1
32
C506
0.1U M
CA508
0.1U M
+
C505
22U
16V
12
R502
10M
R503
47K
CA507
0.47U K
R515
2.2K
R505
2.2K
Q503
2SB772S
3
12
U505
G751-2
A2
5
A1
6
A0
7
VCC
8
SDA
1
SCL
2
O.S.
3
GND
4
C518 220P J
R510
10K
C501
10P J
RA502
5.6K
R512
2.4K
R501
2M
J502
20L2021010
1
2
3
4
5
6
7
8
9
10
G1 G2
Q501
SI4431DY-T1
2
4
7
3
16
5
8
R509
2.2K
R514
10K
C504
0.1U M
RB501
2.2K
RA503
4.7K
Q505
2N3904
1
32
U501
CD4049UBCM
VDD
1
AR
2
A
3
BR
4
B
5
CR
6
C
7
VSS
8
NC
16
FR
15
F
14
NC
13
ER
12
E
11
DR
10
D
9
Q506
2SB772S
3
12
J501
20L2021004
1
2
3
4
G1 G2
U503
G760A
OUT
1
F.G.
2
ON/OFF
3
GND
4
VCC
8
SDA
7
SCLK
6
CLK
5
R511
2.4K
Q502
2N3904
1
32
Y501
25.6KHZ
C510
0.1U M
C507
2200P K
RA501
4.7K
R518
OPEN
R508
2.2K
R517
4.7K
U502
G768B
OUT1
1
VCC
2
DXP1
3
DXN
4
DXP2
5
RESET
6
GND
7
GND
8
OUT2
16
VCC
15
SMBCLK
14
FG2
13
SMBDATA
12
ALERT
11
FG1
10
CLK
9
R520
0
+
C509
22U
16V
12
CA506
0.47U K
RB502
2.2K
RA504
680
RA505
2.2K
+
C503
47U
16V
12
R507
4.7K
R504
10K
R519
OPEN
R513
10K
R516
2.2K
R506
820
C508
2200P K