BenQ Q7T3-FP737S Service Manual page 132

5
Q1
2N3906
3.3V_MCU
2 3
10/9 '03
R1:
R1
10K --> 2K.
2K
D
Q2
2N3906
PC5V
2 3
R9
4.7K R10
2K
R15 1K Q3
1
PC5V_OFF
2N3904
PC5V 3.3_MCU PC5V_OFF
+ - H
+ + L
- + Don't care
C
If both PC5V and 3.3_MCU exist:
PC5V_OFF should set "LOW" to prevent PC5V from entering
the system.
When only PC5V exists:
PC5V_OFF should set "HIGH" to provide CPU power.
Actually, in the initial state, NO PC5V_OFF, if VGA
cable is connected, PC5V exists --> Q4 will ON.
That will make 3.3_M = 3.3V.
B
2061106210
TP86 RXC-
RXC-
TP87 RXC+
19 20
RXC+
17 18
TP88 RX0- TP94
15 16
RX0-
TP89 RX0+
13 14
RX0+
11 12
TP90 RX1-
9 10
RX1-
TP91 RX1+ TP97
7 8
RX1+
5 6
TP92 RX2-
3 4
RX2-
TP93 RX2+
1 2
RX2+
J101
D6
BZV55-C5V1
A
5
4
PC5V
R5
3.3V_M
47
C75
0.1U K
D1
3.3V
DSUB_SDA
DSUB_SCL
BZV55-C5V1
D2
DVIPC5V RX0-
BAV99
DN5
RX0+
RX1-
DVISDA
RX1+
TP95
DVISCL
TP96
DVIPC5VGND R24
RX2-
TP98
10K
RX2+
3.3V_MCU
RXC-
RXC+
D7 D8
BZV55-C5V1
BZV55-C5V1
J
D-detect
BAV99
C49
DN14
0.01U K
4
3
TP1
BZV55-C5V1
D9
TP2
J1
6 TP3
TP4
11 1
7
TP6 TP7
12 2
8
TP9 TP10
13 3
9
TP11
14 4
TP150
10
TP12
15 5
2024012015
BZV55-C5V1
D3
R16
R17
BZV55-C5V1 BZV55-C5V1
D4 R18 D5 R19
10K 10K
3.3V_MCU
R101
J
10
R102
J
10
BAV99 R103
DN6 J
10
BAV99 R104
J
DN7
10
BAV99 R105
DN8 J
10
BAV99 R106
DN9 J
10
BAV99 R107
DN10 J
10
BAV99 R108
DN11 J
10
BAV99
DN12
3
2
3.3V_MCU
C48
0.01U K
J J J J
BAV99 BAV99 BAV99 BAV99
DN15 DN1 DN2 DN3
R2 R3 R4
75 75 75
R6 100
R+
R7 100 C1 47P J
G+
R8 100 C2 47P J
B+
R11 100 C3 47P J
C4 47P J
R13 100
R14 100 C5 47P J
A-detect
C6 47P J
100
HSYNC
100
VSYNC
C8 C9
47P J 47P J
3.3V_MCU
DN4
2 1
BAV70LT1
C10
RX0M
0.1U K
U1
1 8
RX0P A0 VCC
2 7
A1 WP
3 6
RX1M
A2 SCL
4 5
GND SDA
C101
RX1P AT24C02
0.01U K
RX2M
RX2P
RXCM
RXCP
Benq Corporation
Project Code
99.L8372.001
Title
Size PCB P/N
<Size>
48.L8301.S72
Tuesday, December 23, 2003
Date:
Prepared By
ANGEL HU
2
1
D
RED-
RED+
GREEN-
GREEN+
BLUE-
BLUE+
C
DVIPC5V
R20 R21
4.7K 4.7K
B
R22 47
DVISCL
R23 47
DVISDA
A
Model Name OEM/ODM Model Name
Q7T3 <OEM/ODM>
INTERFACE BOARD
PCB Rev. Document Number R ev.
99.L8372.000-C3-304-006 0
S72
Sheet 1 o f 6
Reviewed By Approved By
ARSENIO LIU ARIES CHU
1