4.6.4 Checking PAM Block
PAM Control Signal
TP1. GSM_PA_RAMP : Power Amp Gain Control. typically, 0.5V < Vapc < 2.6V,
TP2. GSM_PA_EN : Power Amp Enable
(Power ON : higher than 2.5V , Power OFF : lower than 0.7V)
TP3. GSM_PA_BAND : Power Amp Band Selection Control
(GSM Mode : lower than 0.7V , DCS/PCS Mode : higher than 2.5V)
TP4. +VPWR : PAM Supply Voltage Vcc higher than 3.28V
4. TROUBLE SHOOTING
- 92 -
TP3
TP2
TP4
TP1
Test Point (RF Tx Level)
Schematic of PAM block
SKY77318
68p
C1028
C1044
15p
15K
R1005
C1013
33u
100ohm
R1024
GND7
13
14
GND8
16
GND9
21
P_GND
RSVD_GND
19
20
VAPC
VBATT
17
VCC1A
2
VCC1B
6
U1001
1
BS
3
DCS_PCS_IN
DCS_PCS_OUT
15
EGSM_IN
4
EGSM_OUT
11
18
ENABLE
5
GND1
7
GND2
GND3
8
9
GND4
GND5
10
12
GND6
SMPY0014001
C1023
22u
C1027
0.01u
R1017100ohm
C1016
0.01u
C1024
0.01u
C1058
15p
+VPWR
GSM_PA_BAND
GSM_PA_EN
GSM_PA_RAMP
TP4
TP1
TP2
TP3
Summary of Contents for U310
Page 3: ... 4 ...
Page 20: ...3 TECHNICAL BRIEF 21 ...
Page 33: ...3 TECHNICAL BRIEF 34 Figure 3 5 10 1 Bluetooth system architecture ...
Page 47: ...3 TECHNICAL BRIEF 48 Figure PM6650 2M Functional Block Diagram ...
Page 72: ...4 TROUBLE SHOOTING 73 4 2 SIGNAL PATH WCDMA Tx PATH WCDMA Rx PATH ...
Page 76: ...4 TROUBLE SHOOTING 77 ...
Page 90: ...4 TROUBLE SHOOTING 91 ...
Page 110: ...4 TROUBLE SHOOTING 111 CN501 C537 C538 MSM6250A ...
Page 116: ...4 TROUBLE SHOOTING 117 C216 C217 for MIC serial capacitor MSM6250A ...
Page 119: ...4 TROUBLE SHOOTING 120 Q400 Q401 Q402 VBATT GND ...
Page 149: ... 150 8 pcb layout ...
Page 150: ... 151 8 pcb layout ...
Page 151: ... 152 8 pcb layout ...
Page 152: ... 153 8 pcb layout ...
Page 153: ... 154 ...
Page 160: ...9 Calibration RF Auto Test Program 161 9 3 1 Example for Calibration Click START U310 ...
Page 163: ... 164 ...
Page 187: ...Note ...
Page 188: ...Note ...