LG MG370 Service Manual page 87

9. PCB LAYOUT
<RF SW>
<Antenna SW>
-Rx, Tx switching selection
<Rx SAW filter>
-Rx operation
<PAM> -Tx amplifier operation
<Baseband plus RF IC>
-Check the battery voltage and
Outputs of LDOs -Rx operation
<Xtal> -Check the frequency
(26Mhz)
<Memory IC> -Check SW download
<Indicator LED>
-Charging LED operation
<Charging IC>
-Check the TA and battery
<Key backlight SW>
-Check all LEDs operation
LGE Internal Use Only
- 86 -
<LCD Backlight driver>
-LCD Backlight problem
<FPCB connector>
-LCD assembly status (FPCB)
-Connetor combination
<Audio amp>
-Speaker spring contact
-Audio amp soldering
<Receiver speaker SW>
-Receiver and Speaker operation
<Xtal>
-Check the frequency (32Khz)
<FM tuner>
-FM radio operation
<SIM connector>
-Socket soldering
-Proper SIM is used
<Vibrator driver>
-Check the vibrator operation
<Back-up battery>
-RTC operation
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Only for training and service purposes