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4.15 Earphone Trouble
Block Diagram
Earphone Detecting Operation
• The ABB operates A/D conversion continuously and if the voltage of “JACK_DETECT” node
goes to 0V and the voltage at “HOOK_DETECT” 0.02V to 0.25V, it detects ear-jack inserted.
• The ABB operates A/D conversion continuously and if the voltage of “HOOK_DETECT” node
goes to 0V, it detects hook switch is pushed.
Earphone Sending Path
• HSMICP is the audio signal from the microphone of the earphone.
• C243, L200 and L201 make the path of the audio signal from the microphone of the
earphone.
• This audio signal is delivered to ABB(IOTA Shrink).
Earphone Receiving Path
• HSO is the audio signal from ABB(IOTA Shrink)).
• C245, R225, L202, and L203 make the path of the audio signal from ABB to earphone.
(1608)
Close to Ear-jack
Close to ABB
EAR-MIC
(1608)
(1608)
V_IO
5.6K
R220
C240
39p
4.7u
C231
C248
27p
10p
C250
100nH
L203
10p
C244
47p
C249
10u
C233
100nH
L202
NA
C246
33K
R227
C243
0.1u
C251
27p
10p
C242
47K
R221
C241
47p
R219
10K
1K
R226
R218
0
L200
100nH
47p
C235
R222
1K
C232
10p
120
R225
100nH
L201
22K
R228
4.7u
C245
C247
10p
CN200
1
2
3
4
5
HSMICP
JACK_DETECT
HOOK_DETECT
HSO
HSMICBIAS
Receiver
GND
MIC
EAR_JACK SPEC
Z3X-BOX.COM
Summary of Contents for MG210
Page 1: ...Date May 2006 Issue 1 0 Service Manual MG210 Service Manual Model MG210 Z 3 X B O X C O M ...
Page 3: ... 2 Z 3 X B O X C O M ...
Page 5: ...Z 3 X B O X C O M ...
Page 32: ...3 H W Circuit Description 31 Figure 14 Power Supply Scheme Z 3 X B O X C O M ...
Page 45: ...4 2 KEYPAD Components Placement 4 TROUBLE SHOOTING 44 U301 MIC200 Z 3 X B O X C O M ...
Page 87: ...4 TROUBLE SHOOTING 86 Waveform PA_ON VRAMP Z 3 X B O X C O M ...
Page 93: ...5 DOWNLOAD 92 5 2 3 Configuration Setting C GSMULTI Model MG210 dll Z 3 X B O X C O M ...
Page 94: ...5 DOWNLOAD 93 5 2 4 Press Start Button MG210 Z 3 X B O X C O M ...
Page 95: ...5 DOWNLOAD 94 5 2 5 After Start Button Which Stand by condition MG210 Z 3 X B O X C O M ...
Page 96: ...5 DOWNLOAD 95 5 2 6 SW downloading Condition MG210 Z 3 X B O X C O M ...
Page 97: ...5 DOWNLOAD 96 5 2 7 SW downloading END Condition MG210 Z 3 X B O X C O M ...
Page 101: ... 100 Z 3 X B O X C O M ...
Page 106: ... 105 8 pcb layout Z 3 X B O X C O M ...
Page 107: ... 106 8 pcb layout Z 3 X B O X C O M ...
Page 111: ... 110 Z 3 X B O X C O M ...
Page 126: ...Note Z 3 X B O X C O M ...
Page 127: ...Note Z 3 X B O X C O M ...