Read Panasonic DP-MB251CX / DP-MB311EU / DP-MB311JT / KX-MB2571RU (serv.man2) Service Manual Supplement online
8
DP-MB251CX/DP-MB311EU/DP-MB311JT/KX-MB2571RU
6.22. WirelessLAN Section
WirelessLAN block consists of WirelessLAN module IC (IC901)
IC300 and IC901 communicate by USB2.0 (High-Speed).
IC901 transmits and receives the signal of a 2.4GHz with TX antenna x2 or RX antenna x1.
IC901 switches the antenna internaly.
IC901 transmits and receives the signal of a 2.4GHz with TX antenna x2 or RX antenna x1.
IC901 switches the antenna internaly.
Wave Form
<USB (Between the Main unit and the WLAN unit)>
During the initialization of the WLAN(After a few seconds of power on)
CN900
1
FG
2
D+
3
D-
4
DG
5
VBUS
GND
C900
22uF
6.3V
GND
GND
GND
R901
0
C902
0.1uF
10V
GND
R907
( )
NC
R906
( )
NC
GND
R902
0
R905
0
C901
( )
NC
GND
GND
C903
( )
NC
GND
L902
4
3
2
1
L903
C905
100pF
C906
1000pF
R903
IC901
3
3
6
6
2
2
4
4
5
5
1
1
WLAN Module
W-LAN Module PCB
A
B
C
C
MAIN BOARD
IC300
N21
N20
A VBUS+3.3V
[CN900- 5]
B D+ [CN900-2]
C D- [CN900-3]
500mV/Div
2V/Div
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