(3) Checking RX I/Q
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
4. TROUBLE SHOOTING
- 48 -
Redownload software and calibration
again
Similar?
No
Replace U402
Yes
No
Check TP7,8.
Check if there is any
Major difference
Refer to graph 4.2.3
TP7
TP8
TEST POINT
WAVEFORM
CIRCUIT
Graph 4.2.3
Figure 4.2.3
17
VCC_TXVCO
12
13
VDD
15
VLDO1
VLDO2
16
9
VLDO3
26
25
RX1900B
RX850
32
31
RX850B
RX900
30
29
RX900B
SCLK
6
5
SDATA
7
SEN
11
TXOP_HI
TXOP_LO
10
18
VAFC_NC
VBAT
14
VCC_BBI
4
24
VCC_BBQ
1
VCC_FE
VCC_REF
AD6548
U402
GND
33
I
2
3
IB
NC
8
Q
23
22
QB
20
REFIN
REFINB
19
REF_OP
21
RX1800
28
27
RX1800B
RX1900
33p
C414
C417
0.1u
C435
100p
100p
C416
10p
C408
180
R418
R414
220
IN
QN
QP
IP
CHECKING FLOW
TP7
TP8
Содержание KP210
Страница 1: ...Date February 2008 Issue 1 0 Service Manual Model KP210 KP215 Service Manual KP210 KP215 ...
Страница 101: ...LGE Internal Use Only Copyright 2008 LG Electronics Inc All right reserved Only for training and service purposes 102 ...
Страница 107: ... 108 LGE Internal Use Only Copyright 2008 LG Electronics Inc All right reserved Only for training and service purposes ...
Страница 121: ...LGE Internal Use Only Copyright 2008 LG Electronics Inc All right reserved Only for training and service purposes 122 ...
Страница 138: ...Note ...
Страница 139: ...Note ...