Speaker Trouble - LG KP105 Service Manual

4.12 Speaker Trouble

TEST POINT
Check Points
- Speaker Pin contact
- Audio amp soldering
TP3
TP2
CIRCUIT
SPEAKER & RECEIVER
TP2
C210 470n R220 10K
RADIO_SPK_L
C212 470n R222 10K
SPK_N
C215 470n R224 10K
SPK_P
SPK_AMP_EN
R226
TP3
100K
TP4
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Only for training and service purposes
TP4
AUDIO AMP
(U204)
TP1
TP1
VBAT
R219 120K
C211
2.2u
U204 TPA6205A1ZQVR
C3 A3
IN- VDD (1608, 10V)
C2 B3
IN+ VO+
B1 A1
_SHUTDOWN VO-
C1 B2
BYPASS GND
R228 120K
C225
220n
- 73 -
4. TROUBLE SHOOTING
TP6
TP5
L202
L201
TP5
R221 4.7
REC_N
C217
15p
R229 4.7
REC_P
TP6
L201 22nH
L202 22nH
C222 C224
C221 C223
15p 15p
NA NA
LGE Internal Use Only
R_S_N
R_S_P