4. TROUBLE SHOOTING
- 76 -
(3) Checking PAM Control Signal
11
VCC_1A
VCC_1B
22
9
VAPC
7
PED_SELECT
GND3
14
15
GND4
GND5
16
17
GND6
GND7
18
GND8
19
GND9
20
ENABLE
8
GND1
12
GND2
13
BAND_SELECT
10
VBAT
VBAT
47p
C517
C513
33p
0.1u
C512
R501
0
0.01u
C518
C521
4.7u
PA_BAND
TX_RAMP
PA_EN
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Similar?
Yes
No
Download S/W
Check TX_RAMP and PA_EN
Check if there is
Any Major Difference or not
Refer to Graph 4
7
Go to Next Step
Similar?
Yes
No
Download S/W
Go to Next Step
Similar?
Yes
No
Download S/W
Download S/W
Check if there is
Any Major Difference or not
Refer to Graph 4 -
Test Points
Waveform
Checking Flow
Circuit Diagram
Graph 4-6
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 ...