Speaker Trouble - LG KG245 Service Manual

4. TROUBLE SHOOTING

4.10 Speaker Trouble

Checking Flow
CIRCUIT
(SPOUT2)
C245
U207
(SPOUT1)
Figure 4-17(a). Speaker Trouble
64 POLY MIDI IC(MP3 Ringtone)
1V8_MIDI_CORE 2V85_VCAM
FB201
C223 C224 C225 C226
0.1u 4.7u 4.7u 0.1u
D3
_MIDI_RST _RST
R229 0
E2
26MHz CLKI
D2
PLLC
H4
_MIDI_CS _CS__SS
F1
ADD00 A0
E3
R230
ADD01 A1
J5
6.8K
_WR _WR_SCK
G4
_RD _RD_SI
G3
DATA00 D0
J2
C235 C250
DATA01 D1
H2
2200p 100p
DATA02 D2
G2
DATA03 D3
H1
DATA04 D4
J1
D4_H1
F3
DATA05 D5
G1
DATA06 D6
F2
DATA07 D7
J6
SO
H5
SMODE
G5 U207
IFSEL
G7
MTR
YMU792
J8
MTR_G7
(EUSY0291001)
H8
LED0
H7
LED1
J7
LED2
E7
_MIDI_IRQ _IRQ
H6
GPIO
G8
BCLK
F7
LRCK
F8
SDIN
E6
MCLK
D6
TESTI0
F6
TESTI1
G6
TESTI2
C7
TESTI3
Figure 4-17(b). Speaker Trouble
- 76 -
C246
Soldering Check
VBAT
C221 C222
4.7u 0.1u
C228
C227
0.1u
0.1u
C2
TXOUT
A2
EXC
C6
EXTOUT
B5
BBL
B6
HPOUTL
C251
C5
BBR
0.1u
A6
R242
HPOUTR
20K
B3
HPC
R234 C241
B4
EQ1
24K 0.01u
A3
EQ2
R239 C242
A4
82K
EQ3 390p
A7
SPOUT2
B7
SPOUT1
A8
SPOUT1_B7
C243
R241
C3
RXIN
A1
RXIN_C3 22n NA
C4
EXTIN
D4
INDEX
C244 C245 C246 C247
47p 47p 47p 0.033u
SPKP_P
SPK_N
SPK_P
SPKP_P