4. TROUBLE SHOOTING
- 87 -
Checking Flow
Figure 4-24.
No
Is BT_RST signal shape similar
to Fig.1 during Powering
on Bluetooth
Yes
Replace U101
2V8_VBT at C300=2.8V
No
BT_EN at R311=2.8V
No
Replace U101
Yes
Replace U300
Bluetooth
Power off
Is DEBUG_TX signal similar to
Fig.2 during Powering on
Bluetooth?
No
Replace U101
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 M300
Replace M300
Establish a call
Is DEBUG_RX signal similar to
Fig.4-10(b) during Powering on
Bluetooth?
No
Replace M401
Are PCM_SYC8,PCM_TX,USC3
signal similar to Fig.14-8(c) ?
No
Replace U101
Redownlapd SW
No
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 ...
Page 195: ...Note ...