4. TROUBLE SHOOTING
- 91 -
4.7.1 Checking RF Tx level
4.7.2 Schematic of RF Tx level
DCS
PCS
Rev.I
GSM
Rev.1.2
ANT100
WFL-R-SMT10
ANT
G1
G2
G3
56p
C100
1000p
C113
15nH
L103
5.6nH
L104
100nH
L101
0.5p
C108
1000p
C112
C102
NA
L107
5.6nH
0.1u
C120
0.5p
C114
1000p
C115
22nH
L109
5.6nH
L102
10p
C119
5.6nH
L105
L106
15nH
ANT
G1
G2
RF
KMS-512
SW100
39nH
L110
L100
0.5p
0
R100
3
GSM1900RX1
GSM1900RX2
4
GSM850RX1
7
8
GSM850RX2
GSM850_900TX
25
5
GSM900RX1
GSM900RX2
6
NC
17
UMTS1
15
16
UMTS2
VC1
14
13
VC2
VC3
12
11
VC4
VDD
10
ANT
19
9
GND1
18
GND2
GND3
20
21
GND4
23
GND5
24
GND6
GND7
26
GND8
27
28
GND9
1
GSM1800RX1
GSM1800RX2
2
22
GSM1800_1900TX
FL100
LMSP4LMA-573TEMP
C125
NA
L111
22nH
ANT_SEL0
ANT_SEL2
ANT_SEL1
VREG_RF_SMPS
HIGH
GSM 900 RX
GSM_PA_BAND
LOW
HIGH
ANT_SEL2
GSM
GSM 1800/GSM 1900 TX
HIGH
LOW
GSM
LOW
HIGH
Rev.1.3
LOW
DCS/PCS
GSM 850/GSM 900 TX
LOW
LOW
HIGH
Rev. 1.1
LOW
ANTENNA SWITCH MODULE LOGIC
HIGH
LOW
GSM 850 RX
MODE
ANT_SEL1
GSM 1800 RX
GSM 1900 RX
ANT_SEL0
HIGH
HIGH
Rev.1.3
LOW
HIGH
LOW
LOW
LOW
WCDMA
LOW
HIGH
C150
1.2p
3.3nH
L115
NA
C142
22nH
C146
33u
C143
C141
0.5p
L114
1.2nH
R116
2.2K
68p
C152
C137
56p
1u
C145
GND8
GSM_IN
7
GSM_OUT
9
3
TX_EN
VBATT
4
VCC
12
VRAMP
6
TQM7M5003
BS
2
1
DCS_PCS_IN
DCS_PCS_OUT
15
5
GND1
8
GND2
GND3
10
GND4
11
13
GND5
GND6
14
16
GND7
17
U101
56p
C144
EFCH897MTDB
FL10
GSM_PA_BAND
+VPWR
GSM_PA_RAMP
GSM_PA_EN
TP1
TP2
TP3
Summary of Contents for U970
Page 1: ...Date April 2007 Issue 1 0 Service Manual Model U970 KU970 Service Manual U970 KU970 ...
Page 3: ... 4 ...
Page 20: ...3 TECHNICAL BRIEF 21 Fig 1 2 RTR6275 RX feature ...
Page 28: ...3 TECHNICAL BRIEF 29 Figure1 7 PM6650 Block Diagram ...
Page 41: ...3 TECHNICAL BRIEF 42 Table 1 1 Summary of MSM6280 device features ...
Page 45: ...3 TECHNICAL BRIEF 46 Figure 1 1 PM6650 Functional Block Diagram ...
Page 76: ...4 TROUBLE SHOOTING 77 4 1 RF CRF Component TOP SIDE BOTTOM SIDE 4 TROUBLE SHOOTING ...
Page 81: ...4 TROUBLE SHOOTING 82 Check C412 of PMIC U400 Check R214 of MSM U200 ...
Page 83: ...4 TROUBLE SHOOTING 84 Logic Table of the FEM ...
Page 89: ...4 TROUBLE SHOOTING 90 4 7 Checking GSM Block ...
Page 91: ...4 7 3 Checking RF Tx level 4 TROUBLE SHOOTING 92 ...
Page 94: ...4 TROUBLE SHOOTING 95 ...
Page 100: ...4 TROUBLE SHOOTING 101 R403 Q402 Q401 Q400 Charging part Main PCB Front ...
Page 103: ...4 TROUBLE SHOOTING 104 Q400 X 200 USB part 1 Main PCB Front U503 USB part 2 Main PCB Rear ...
Page 112: ...4 TROUBLE SHOOTING 113 CN601 CN701 CN700 ...
Page 115: ...4 TROUBLE SHOOTING 116 C500 C501 R501 R502 ...
Page 117: ...4 TROUBLE SHOOTING 118 SPK Audio Amplifier Analog Switch ...
Page 119: ...4 TROUBLE SHOOTING 120 MIC800 R507 C520 ...
Page 121: ...4 TROUBLE SHOOTING 122 R303 Ear_Sense_N C210 MIC Input ...
Page 141: ...5 DOWNLOAD 142 ...
Page 147: ...5 DOWNLOAD 148 Read IMEI BT address from UE 2 Step 4 Check IMEI and Bluetooth address ...
Page 158: ...6 BLOCK DIAGRAM 159 Table 2 1 RF Block Component ...
Page 163: ...6 BLOCK DIAGRAM 164 6 2 4 Placement Top Side ...
Page 164: ...6 BLOCK DIAGRAM 165 Bottom Side ...
Page 165: ... 166 ...
Page 175: ... 176 8 PCB LAYOUT U970 KU970 ...
Page 176: ... 177 8 PCB LAYOUT U970 KU970 ...
Page 177: ... 178 8 PCB LAYOUT U970 KU970 ...
Page 178: ... 179 8 PCB LAYOUT U970 KU970 ...
Page 179: ... 180 8 PCB LAYOUT ...
Page 180: ... 181 8 PCB LAYOUT ...
Page 181: ... 182 ...
Page 187: ... 188 ...
Page 189: ... 190 ...
Page 209: ...Note ...
Page 210: ...Note ...