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4. TROUBLE SHOOTING
Checking Rx IQ Circuit
U607
RXIN
RXIP RXQP RXQN
R
6
2
0
0
R
6
2
1
0
R
6
1
8
0
R
6
1
9
0
R
X
N I
R
X
P I
R
X
Q
P
R
X
Q
N
R
6
0
7
6
8
0
T
X
N I
C
6
2
7
8
2
0
p
T
X
P I
R
6
0
8
6
8
0
R
6
0
9
6
8
0
T
X
Q
P
C
6
3
6
8
2
0
p
T
X
Q
N
R
6
1
0
6
8
0
- 84 -
No
Yes
RX Part is OK.
Check Base Band Circuit
or Redownload the software
and Calibrate again.
Replace RF
Transceiver
[U607]
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