3.5.5. GSM PAM (U101:TQM7M5003)
The TQM7M5003 is an extremely small (7 x 7 mm), GSM/EDGE PAM for handset applications. This
module has been optimized for excellent EDGE efficiency and Pout in a Polar Loop environment at
EDGE class E2+ operation while maintaining high GSM/GPRS efficiency.
The small size and high performance is achieved with high-reliability 3
rd
generation InGaP HBT
technology. With 50Ω and output, no external matching or bias components are required.
The module incorporates two highly-integrated InGaP power amplifier die with a CMOS controller.
Each amplifier has three gain stages with on-die inter-stage matching implemented with a high Q
passives technology for optimal performance. The CMOS controller implements a fully integrated
power control within the module for GSM operations, and serves as the AM/AM path in EDGE
operations. This eliminates the need for any external couplers, power detectors, current sensing etc.,
to assure the output power level. The module has Tx enable and band select inputs. Module
construction is a low-profile overmolded landgrid array on laminate.
3. TECHNICAL BRIEF
- 30 -
[Figure 1. 8] GSM PAM Schematic
GSM_PA_BAND
HIGH
10 dB
GSM
8 dB
Rev.1.3
DCS/PCS
Rev. 1.1
MODE
Rev.1.3
LOW
68
R108
R112
51
91
R110
91
R111
C150
1.2p
3.3nH
L115
120
R114
NA
C142
22nH
C146
33u
C143
C141
0.5p
L114
1.2nH
R116
2.2K
68p
C152
C137
56p
1u
C145
120
R115
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
EFCH897MTDB1
FL101
2
G1
3
G2
5
G3
1
IN
4
O1
GSM_PA_BAND
+VPWR
DCS_PCS_TX
GSM_TX
GSM_PA_RAMP
GSM_PA_EN
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 ...