4. TROUBLE SHOOTING
- 122 -
4.14 Headphone Trouble
Figure 4-82.
Figure 4-85.
Figure 4-83.
Figure 4-84.
C405
C404
C401
U100
U404
U405
U403
TEST POINT
(GPIO_9)
(MP3_PLAY/PAUSE)
(HOOK_DETECT)
(MP3_FF)
(MP3_REW)
EVL5M02200
VA404
680
R414
VA401
EVL5M02200
4.7
R408
C401
10u
100
R405
EVLC18S02015
VA409
VA410
EVLC18S02015
C409
47p
100
R413
VA403
EVL5M02200
2V8_VMEM
14
2
3
4
5
6
7
8
9
CN401
1
10
11
12
13
100
R410
R406
4.7
39p
C402
100
R411
1K
R401
R409
100
EVLC18S02015
VA407
0.1u
C403
C410
47p
R402
100K
100
R404
VA406
EVLC18S02015
47p
C407
C408
1u
VA408
EVLC18S02015
100
R431
VA405
EVL5M02200
R403
2.2K
EVL5M02200
VA402
C406
1u
2V5_VMIC
2.2K
R412
KEY_ROW0
KEY_COL5
KEY_COL4
KEY_COL3
KEY_COL2
JACK_DETECT
AUX_MIC_N
AUX_MIC_P
NC PORT
(GPIO_39)
CONNECTED PORT
AUDIO PATH SWITCH
HIGH
LOW
NO PORT
1u
(GPIO_40)
C431
C3
COM1
A3
COM2
B1
GND
C2
IN1
A2
IN2
C1
NC1
A1
NC2
C4
NO1
A4
NO2
B4
V+
U404
NLAS4684FCT1G
NLAS4684FCT1G
U403
COM1
C3
COM2
A3
GND
B1
IN1
C2
IN2
A2
NC1
C1
NC2
A1
NO1
C4
NO2
A4
V+
B4
0
R429
C432
1u
2V8_MM
2V8_MM
R428
0
SND_HPROUT
SND_HPLOUT
SND_SRC_SEL
HP_LOUT
HP_ROUT
HP_SRC_SEL
AUX_OUT_L
AUX_OUT_R
SND_HPLOUT
SND_HPROUT
MIDI_HPROUT
CODEC_HPROUT
CODEC_HPLOUT
MIDI_HPLOUT
CIRCUIT
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 ...
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