LG KG280 Service Manual - Page 74
Microphone Trouble
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4. TROUBLE SHOOTING 4.14 Microphone Trouble TEST POINT C228 R222 C230 R221 CIRCUIT Figure 23 MIC200 MAIN MIC 2V5_VMIC VINNORP VINNORN R219 1K R220 1K C227 39p ECTH0004806 C226 22uF FB201 SFBH0008102 R221 100ohm C228 39p R222 100ohm C230 0.1u R223 2.2K R232 NA R233 C229 NA 39p BOS-T1342SDN3-LH SUMY0010509 MIC200 1 2 C231 NA C232 NA VA202 EVLC18S02003 VA203 EVLC18S02003 Copyright © 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes - 75 - LGE Internal Use Only
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LGE Internal Use Only
Copyright © 2007 LG Electronics. Inc.
All right reserved.
Only for training and service purposes
4. TROUBLE SHOOTING
- 75 -
4.14 Microphone Trouble
TEST POINT
CIRCUIT
R221
C228
R222
C230
MIC200
MAIN MIC
VA202
EVLC18S02003
R219
1K
39p
C228
NA
C232
VA203
EVLC18S02003
C231
22uF
C226
ECTH0004806
NA
R223
2.2K
1
2
MIC200
BOS-T1342SDN3-LH
SUMY0010509
100ohm
R221
1K
R220
FB201
SFBH0008102
NA
NA
R233
R232
39p
C229
R222
100ohm
2V5_VMIC
C227
39p
C230
0.1u
VINNORP
VINNORN
Figure 23