Earphone Trouble - LG MG295 Service Manual

4.11 Earphone Trouble

TEST POINT
R221
R207
R220
R216
CIRCUIT DIAGRAM
JACK_DETECT
L REMOVE
H INSERT
JACK_DETECT
C233 0.1u
AUXIP
C210 0.1u
AUXIN
C214 C215
27p 27p
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Figure 4.11
2V8_VMEM
U210
NLAS5223BMNR2G
1
VCC
2
NO_POP_L
NO1
R207
C208 100u
3
20 C203 AUXOP_L
COM1
100p
4
POP_EN
IN1
R704
5
NC1
NA
2V8_VMEM
R216
3K
NO_POP_L
R220 1.5K
NO_POP_R
C216
10u
4. TROUBLE SHOOTING
2V8_VEXT
10
NO2 NO_POP_R
R208
9 1M
AUXOP_R
COM2
100u C211 U201
4 5 NCS2200SQ2T2G
8
VIN-
POP_EN
IN2
VCC 1
VIN+ 3 OUT
7
GND
NC2
2
6
R213
GND
220K
R215
R217 24
FB201 1800
FB202 1800
R221 24
FM_ANT
VA202 C219 R224
C220
C218
47p
27p 1M
39p
- 67 -
J201
R217
CLOSE TO EARJACK
HOOK_DET
C204
1u
NA
J201
FB200 1800
VA200 VA201
C221 C222
C223 L200
NA 4.7uH
47p
150p
LGE Internal Use Only