5. Trouble shooting
5.6 Receiver & Speaker trouble
Check Points
-Speaker pin contact
-Audio amp soldering
-SUB PMIC soldering
AUDIO AMP SUB SYSTEM & SIGNAL DISTRIBUTOR
VBAT
0
C304 1u
A4 C1N
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| R300 |
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C301 |
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| C302 | |
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1u |
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| 1u | |
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A3 | B1 | C5 | |||||
VSS | VDD | PVDD | |||||
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| C305 | 1u A5 | C1P | ||||
| TP1C308 |
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| D1 | |||
| 1u |
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BB_SND_R |
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| INA2 | ||||||||
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| D2 | ||
| C309 | 1u |
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BB_SND_L |
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| INA1 | |||||||
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TP2C311 | 1u |
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| C1 | |||||||
FM_SND_R |
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| INB2 | ||||||||
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| C2 | ||
FM_SND_L |
| C312 | 1u |
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| INB1 | |||||
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| B2 | ||
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| BIAS | |
i2C_SDA |
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| B3 | SDA |
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| C3 | ||
I2C_SCL |
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| D4 | SCL |
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| RXIN+ | |
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| B4 | RXIN- |
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| C315 | |||
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| 1u |
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HPR | A1 | R313 | 0 | HSO_R |
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HPL | A2 | R314 | 0 | HSO_L |
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U303 |
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MAX9877AEWP_TG45 | D5 |
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OUT+ |
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| SPK_P | |
OUT- | B5 |
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| SPK_N |
GND | PGND | |
D3 | C4 | |
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SPK
MAIN RECEIVER
SPK_P
SPK_N
C544
47p
| L500 |
| TP3 |
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| 100nH |
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C542 |
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100p |
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| TP4 |
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| L501 |
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C545 | 100nH | EVLC18S02015 | VA501 | EVLC18S02015 |
VA500 | ||||
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47p |
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CN501 |
| 0 TP5 | + | |
1 | R100 | |||
RCV_P |
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| OUT100 | |
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2 | R102 | 0 | OUT101 | |
RCV_N | ||||
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| |||
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| - | ||
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| TP6 | ||
C101 | C102 |
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| |
47p | 47p |
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LGE Internal Use Only | - 76 - | Copyright © 2008 LG Electronics. Inc. All right reserved. |
|
| Only for training and service purposes |
