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4. TROUBLE SHOOTING
(4) Checking RX IQ
TEST POINT
U502
Figure 4-12.
CIRCUIT
CHECKING FLOW
Check if there is any
C523
C526
PP
XOUT
PN
DP
U502
DN
BQP
SI4210D
EP
BQN
EN
SDIO
AP
_SEN
AN
SCLK
Check C523,C526.
Major difference
Refer to graph 4-3
Redownload software and calibration again
WAVEFORM
C520
C521
C522
22p
0.1u
100p
8
BIP
7
BIN
6
5
4
3
2
1
Figure 4-13.
No
Similar?
Yes
Figure 4-14.
- 82 -
Graph 4-5.
IP
C523
39p
IN
QP
C526
39p
QN
S_DATA
(GPO_20)
(GPO_19)
S_EN
(GPO_21)
S_CLK
Replace U501
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