(3) Checking Mobile SW & FEM
4. TROUBLE SHOOTING
- 80 -
TEST POINT
CIRCUIT
WAVEFORM
Figure 4-9.
Graph 4-3. GSM Tx mode
Figure 4-10.
SW501.ANT
SW501.RF
VC_DCSPCS
FL501
SW501
C528
C522
VC_EGSM
(GPO_11)
(GPO_9)
22p
R503
0
C516
L501
18nH
G1
G2
RF
TP502
KMS-507
SW501
ANT
TP501
C507
NA
R505
4.7p
C524
270p
TP503
C528
270p
GND9
20
PCS_RX1
14
15
PCS_RX2
3
VC_DCSPCS
9
VC_EGSM
13
DCS_RX2
EGSM_RX1
10
11
EGSM_RX2
EGSM_TX
8
GND1
2
21
GND10
GND11
22
23
GND12
GND13
24
GND2
4
6
GND3
7
GND4
GND5
16
17
GND6
GND7
18
19
GND8
HWXQ511
FL501
1
ANT
5
DCSPCS_TX
DCS_RX1
12
R517
0
0
R516
0
R504
ANT_SW1
ANT_SW2
Graph 4-4. DCS,PCS Tx mode
Summary of Contents for KG920
Page 3: ... 4 ...
Page 48: ...3 TECHNICAL BRIEF 49 3 8 2 AFE Analog Front End Figure 3 22 ...
Page 52: ...3 TECHNICAL BRIEF 53 3 8 5 MBGM01 5M CCD ISP Figure 3 25 ...
Page 55: ...3 TECHNICAL BRIEF 56 3 8 6 MV8620 5M back end IC Multi Media Function Figure 3 26 ...
Page 58: ...3 TECHNICAL BRIEF 59 3 9 MIDI IC YMU787 Figure 3 27 YMU787 BLOCKDIAGRAM ...
Page 108: ...4 TROUBLE SHOOTING 109 CIRCUIT WAVEFORM Figure 4 59 Graph 4 11 Figure 4 60 Figure ...
Page 109: ...4 TROUBLE SHOOTING 110 TEST POINT U602 FB602 U100 Q100 Q101 C113 C114 Figure 4 61 Figure 4 62 ...
Page 112: ...4 TROUBLE SHOOTING 113 Figure 4 67 Figure 4 68 CIRCUIT ...
Page 115: ...4 TROUBLE SHOOTING 116 WAVEFORM Graph 4 13 ...
Page 139: ...6 BLOCK DIAGRAM 140 6 BLOCK DIAGRAM Figure 6 1 ...
Page 148: ... 149 8 PCB LAYOUT ...
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 8 PCB LAYOUT ...
Page 154: ... 155 8 PCB LAYOUT ...
Page 155: ... 156 8 PCB LAYOUT ...
Page 163: ... 164 ...
Page 194: ...Note ...
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