4. TROUBLE SHOOTING
- 88 -
No
Is BT_RST signal shape similar
to Fig.1 during Powering on Bluetooth
Yes
Replace U102
2V8_VBT at C706=2.8V
No
BT_EN at R700=2.8V
No
Replace U102
Yes
Replace U700
Bluetooth
Power off
Is DEBUG_TX signal similar to
Fig.2 during Powering on Bluetooth?
No
Replace U102
Is DEBUG_RX signal similar to
Fig.2 during Powering on Bluetooth?
No
Replace Headset
Connect BT headset?
No
Is RF Power level at
Antenna Feeding about 0dBm?
Is RF Power level at
Antenna Feeding about 0dBm?
Replace M700
Replace M700
Establish a call
Is DEBUG_RX signal similar to
Fig.2 during Powering on Bluetooth?
No
Replace M700
Are PCM_SYC8,PCM_TX,USC3
signal similar toFig.3?
No
Replace U102
Redownlapd SW
No
Checking Flow
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 ...