LG KM380t Service Manual page 111

10. PCB LAYOUT
J302 3.5pi ear-jack conn.
No 3.5pi headset sound
BAT100 Backup Battery
RTC Reset
U304 DC Motor driver
No Vibrator
VB300 Vibrator conn. VB300 Vibrator conn.
No Vibrator No Vibrator
U501 SKY77340(Power amp)
Tx power no service
CN301 18pin MMI conn.
No charging
No headset sound
U201 Audio DAC/Amp.
No sound Speaker/Headset
CN402 40pin LCD conn.
No LCD display
U500 BLUECORE5-FM
(BT/FM Module)
No BT connection
FM radio no service
U503 USB Switch
No USB connection
No Mass storage
U202 TCC8720
(MP3 decoder chip)
No MP3 sound play
U401 LCD Backlight driver
No LCD Backlight
U303 Charging IC
No Charging
U400 Hall effect IC
No Flip On/Off detection
LGE Internal Use Only - 112 -
SW500 Antenna Switch
No Network
U502 Rx SAW Filter
GSM Rx sensitivity
No Service
U302 Camera socket
No camera preview
U300 Camera LDO
No camera preview
U102 PMB8888 (BB chip)
No power on
No sound, No display
No service
U200 Power switch
No MP3 sound play
U100 Memory
No Booting
U204 Sub PM IC
No sound/No MP3 play
S1 Micro SD Socket
No Micro SD card
detection
CN300 Battery conn.
No Power on
MIC400 Mic.
No sending voice
J301 SIM Socket
No SIM detection
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Only for training and service purposes