
BenQ
Rev 1.0
3.12
Earphone jack circuit
VR2B_SW
T2
TVS
1
2
. .
J3
Audio Jack
1
2
3
4
5
GND
SW
SPK
MIC
MIC
R86
2.7K
C60 10UF
U8
NC7SB3157
1
3
2
4
5
6
B1
B0
Gnd
A
Vcc
S
D21
BAS516
1
2
R96
0
C63 10UF
R37
2K
R38
1K
TP33
1
R36
47K
T9
TVS
1
2
..
R72
1K
T8
TVS
1
2
..
U9
EMIF01-10005W5
1
2
3
4
5
I1
GND
I2
O2
O1
R32
100K
C37
4.7UF
L: Download
H: Earpiece
active
plug in
Data cable
Hand free
VR3
VR2B_SW
C38
1UF
U10
NC7SB3157
1
3
2
4
5
6
B1
B0
Gnd
A
Vcc
S
R41
2K
R95
20K
To Nausica
V=1.0~2.4 Handfree
V=2.6~2.8 Data-cable
BGND
BGND
BGND
BGND
TXD0
AUXOP
IO13ACCIN
VR3
IO3DATA_HP_SEL
BGND
BGND
BGND
BGND
AUXI
RXD0
EARPHONE_IN
Description
The earphone Jack circuit is used either for the headset or the data
service. The IO13ACCIN will be pulled to low level when headset or
data cable is plugged in. Here, U8 and U10 are used as the switch
between headset using or data service using which is controlled by the
IO3DATA_HP_SEL. When IO13ACCIN is detected as low level,
IO3DATA_HP_SEL is switched from low to high level to identify whether
the headset or the data cable is plug-in by reading the voltage at
EARPHONE_IN. If the voltage at EARPHONE_IN is in the range of
1.0V to 2.4V, the phone recognizes headset is plugged in and
IO3DATA_HP_SEL stays at high to keep U8 and U10 as auxiliary audio
path. If the voltage at EARPHONE_IN is in the range of 2.6V to 2.8V,
the phone identifies data cable plugged in and IO IO3DATA_HP_SEL
switches back to low to keep U8 and U10 as data service path.
33
Summary of Contents for C200
Page 2: ......
Page 4: ...4 May 19 2003 6809464A58 Contents Product Family D10 ...
Page 18: ...18 May 19 2003 6809464A5 O General Operation Product Family D10 PRELIMINARY ...
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Page 91: ...BenQ Rev 1 0 Radio Frequency function Descriptions Top Side 50 Bottom Side ...
Page 92: ...BenQ Rev 1 0 51 ...
Page 95: ...BenQ Rev 1 0 54 Apollo Block Diagram ...
Page 96: ...BenQ Rev 1 0 Tx Block Diagram 55 ...
Page 97: ...BenQ Rev 1 0 56 Rx Block Diagram ...
Page 98: ...BenQ Rev 1 0 57 TX Front End EGSM DCS ...
Page 99: ...BenQ Rev 1 0 58 Rx Front End EGSM DCS ...
Page 100: ...BenQ Rev 1 0 59 RF power management ...
Page 101: ...BenQ Rev 1 0 60 Tx Power ...
Page 102: ...BenQ Rev 1 0 VCXO 61 ...
Page 103: ...BenQ Rev 1 0 Base Band full schematic 62 ...
Page 104: ...BenQ Rev 1 0 RF full schematic 63 ...
Page 140: ...BenQ Rev 1 0 Replacement Parts Exploded View 99 Fig 1 Mechanical Exploded View I ...
Page 141: ...BenQ Rev 1 0 Fig 2 Mechanical Exploded View II 100 ...
Page 142: ...BenQ Rev 1 0 Fig 3 Mechanical Exploded View III 101 ...