4. TROUBLE SHOOTING
- 77 -
(4) Checking TX IQ
6
1
VCC3
5
Q+_TX_Q+
Q-_TX_Q-
4
9
VAPC
VCC1
2
3
I-_TX_I-
67
PCO3
PCO4
68
7
PED_SELECT
I+_TX_I+
ENABLE
8
10
VBAT
39p
C511
39p
C510
22u
C509
C513
33p
33p
C507
0.1u
C512
C508
0.1u
QP
IP
IN
QN
Redownload the Software
And calibrate
Check if there is
Any Major Difference
Refer to Graph 4 -8
Similar?
Yes
No
Replace U500
Test Points
Waveform
Circuit Diagram
Checking Flow
Graph 4-8
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 ...