4. TROUBLE SHOOTING
- 89 -
4.3 Power On Trouble
TEST POINT
CIRCUIT
Figure 4-25.
C121
(2V5_VMIC)
C117
(2V8_VMEM)
C122
(2V75_VVCXO)
C119
(2V85_VSIM)
C126
(2V8_VEXT)
C120
(2V75_VABB)
C116
(1V8_VCORE)
U101
U100
Figure 4-26.
(1608)
1u
C117
2V8_VEXT
BAT100
VUSB
1V8_VCORE
N16
VMIC
VRTC
T7
T6
VSIM
VUSB
E15
D16
VVCXO
P1
VCORE1
VCORE2
N1
A4
VEXT1
VEXT2
B4
VMEM1
T3
T2
VMEM2
VABB
H16
F16
VAPP
VAPPGATE
E16
VBACK
T4
C121
1u
2V75_VVCXO
2V5_VMIC
1u
C126
1V8_VRTC
C119
1u
C118
0.1u
1u
C127
1u
VBAT
C116
R100
10K
2V8_VMEM
2V85_VSIM
C125
2.2u
C120
1u
1u
C122
2V75_VABB
Содержание KG920
Страница 3: ... 4 ...
Страница 48: ...3 TECHNICAL BRIEF 49 3 8 2 AFE Analog Front End Figure 3 22 ...
Страница 52: ...3 TECHNICAL BRIEF 53 3 8 5 MBGM01 5M CCD ISP Figure 3 25 ...
Страница 55: ...3 TECHNICAL BRIEF 56 3 8 6 MV8620 5M back end IC Multi Media Function Figure 3 26 ...
Страница 58: ...3 TECHNICAL BRIEF 59 3 9 MIDI IC YMU787 Figure 3 27 YMU787 BLOCKDIAGRAM ...
Страница 87: ...4 TROUBLE SHOOTING 88 Graph 4 8 BLUE RST Graph 4 9 DEBUG_TX RX Graph 4 10 PCM_SYNCS TX RX USC0 ...
Страница 96: ...4 TROUBLE SHOOTING 97 4 7 KEY backlight Trouble TEST POINT Q101 R122 Q101 LD101 LD119 Figure 4 38 Figure 4 39 ...
Страница 108: ...4 TROUBLE SHOOTING 109 CIRCUIT WAVEFORM Figure 4 59 Graph 4 11 Figure 4 60 Figure ...
Страница 109: ...4 TROUBLE SHOOTING 110 TEST POINT U602 FB602 U100 Q100 Q101 C113 C114 Figure 4 61 Figure 4 62 ...
Страница 111: ...Figure 4 65 Graph 4 12 4 TROUBLE SHOOTING 112 C102 C113 U101 Figure 4 66 C137 U103 TEST POINT WAVEFORM ...
Страница 112: ...4 TROUBLE SHOOTING 113 Figure 4 67 Figure 4 68 CIRCUIT ...
Страница 115: ...4 TROUBLE SHOOTING 116 WAVEFORM Graph 4 13 ...
Страница 139: ...6 BLOCK DIAGRAM 140 6 BLOCK DIAGRAM Figure 6 1 ...
Страница 148: ... 149 8 PCB LAYOUT ...
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