4. TROUBLE SHOOTING
- 74 -
(2) Checking Ant SW & Mobile SW
VC1 LOW
VC2 LOW
VC3 HIGH
VC1 LOW
VC2 HIGH
VC3 LOW
C503
27p
27p
C505
27p
C504
C502
1000p
RF
SW500
KMS-506
ANT
G1
G2
GND4
7
14
GND5
8
GSM18001900_TX
4
GSM1800_RX
2
GSM1900_RX
6
GSM900_RX
GSM900_TX
10
11
VC1
VC2
9
12
VC3
FL500
LMSP54LA-413TEMP
ANT
13
GND1
1
3
GND2
GND3
5
ANT_SW2
ANT_SW3
ANT_SW1
Figure 4-5
Graph 4-6(b)
FEM Control DCS & PCS
Graph 4-6(a)
FEM Control EGSM
Test Points
Circuit Diagram
Waveform
Z3X-BOX.COM
Summary of Contents for MG300d
Page 23: ...3 TECHNICAL BRIEF 24 Figure 3 1 SKY74400 FUNCTIONAL BLOCK DIAGRAM Z 3 X B O X C O M ...
Page 83: ...4 TROUBLE SHOOTING 84 4 6 LCD Trouble EMI FILTER CN600 Test Points Z 3 X B O X C O M ...
Page 110: ...5 DOWNLOAD AND CALIBRATION 111 8 Push the START button Z 3 X B O X C O M ...
Page 111: ...5 DOWNLOAD AND CALIBRATION 112 9 Phone test Finish is shown in below screen Z 3 X B O X C O M ...
Page 112: ...6 BLOCK DIAGRAM 113 6 BLOCK DIAGRAM Z 3 X B O X C O M ...
Page 113: ... 114 Z 3 X B O X C O M ...
Page 124: ... 125 MG300d 8 PCB LAYOUT Z 3 X B O X C O M ...
Page 125: ... 126 MG300d 8 PCB LAYOUT Z 3 X B O X C O M ...
Page 137: ... 138 Z 3 X B O X C O M ...
Page 138: ... 139 Z 3 X B O X C O M ...
Page 140: ... 141 12 EXPLODED VIEW REPLACEMENT PART LIST Z 3 X B O X C O M ...
Page 141: ... 142 Z 3 X B O X C O M ...