Service manual

Schematic Diagrams
B - 28
Schematic Diags
Fan Control & Beep
Sheet 27 of 42
Fan Control & Beep
VCC3
VCC5
VCC5S
VCC3S
VDD5
VDD5
VDD3
VDD3
VCC3S
+2.5V
VCC3
VCC3
VDD3
VDD3
VDD3
VDD5
VDD3
Z173 PWROK
PWROK
PCBEEP
SPKROUT
H8_BEEP
1.5V/2.5V_PG
H8BEEP
H8_BEEP
FAN2#
FAN3#
FAN1-ON
FAN1-ON
FAN1-ON
FAN1#
R825
4(0805)
R821
1K(1206)
Q53
2N7002
D
G
S
Q51
2SB1198K(R)
B
E
C
+
C982
100U/16V(D)
R820
4.7K(R)
R819
4.7K
R822 510
R329 0
C353
0.1U(R)
R643
100K
R651 10K
R642 100K
R652 510
R479
4.7K
R319 0(R)
R318 0(R)
C346
0.1U(R)
C347
0.1U
U22
MAX6306UKD3
1
2
3
4
5
RESET#
GND
MR#
RST-IN
VCC
U26
MAX809(R)_SOT23
3
1
2
VCC
GND
RESET#
D78
1SS355
A C
Q52
2SB1198K
B
E
C
Q31
2N7002
D
G
S
R653
4.7K
Q37
2SB1198K
B
E
C
+
C569
100U/16V(D)
R328
1K(1206)
Q29
2SB1198K
B
E
C
R481
4.7K(R)
R644
4.7K(R)
C175 1U
C176
1U
R480 510
Q35
2N7002
D
G
S
Q36
2SB1198K(R)
B
E
C
Q28
2SB1198K(R)
B
E
C
R478
1K(1206)
+
C352
100U/16V(D)
C403
0.1U
JFAN2
FI-S03P-HF
1
2
3
R344 10K
D51 1SS355
AC
C174
1U
U17
74AHC1G08(SC-88A)
2
1
4
3
5
R261 1M
C285
2200P
R650
10K
R330 0(R)
U23
74AHC1G08(SC-88A)
2
1
4
3
5
C795
0.1U(R)
R622 10K
D48 1SS355
AC
JFAN4
FI-S03P-HF
2
1
3
JFAN3
FI-S03P-HF
2
1
3
D49
1SS355
A C
D38
1SS355
A C
U18
74AHC1G14(SC-88A)
24
53
C548
0.1U(R)
R452 10K
D37 1SS355
AC
PWROK [3,6,19]
PWROK [3,6,19]
FAN1-ON[31]
FAN1-ON[31]
PCBEEP[19]
SPKROUT[33]
LBP [24]
H8_BEEP[18]
FAN1#[31]
1.5VPG[42]
2.5VPG[40]
1.5V/2.5V_PG
1.5V/2.5V_PG
PGOOD[19,38]
H8BEEP[31]
FAN2#[31]
FAN3#[31]
FAN1-ON[31]
40MIL
40MIL
40MIL
40MIL
CPU FAN
CPU FAN
DDR FAN
40MIL
40MIL
40MIL
40MIL
40MIL