LG F3000 Service Manual page 26

The backlight of LCD module is controlled by DBB via AAT2807AIXN-4.5, U802. The control signals
related to Backlight LED are given bellow.
Signals
LCD_DIM_CTL
(GPO 23)
LCD_LED_CTL
LCD_LED_GND
Table 3-3. DESCRIPTION OF LCD BACKLIGHT LED CONTROL
C. RF interface
The AD6527B control RF parts through PA_BAND, ANT_SW1, ANT_SW2, ANT_SW3 , CLKON ,
PA_EN, S_EN, S_DATA, S_CLK, RF_PWR_DWN.
Signals
PA_BAND (GPO 17)
ANT_SW1 (GPO 9)
ANT_SW2 (GPO 11)
ANT_SW3 (GPO 10)
CLKON
PA_EN (GPO 16)
S_EN (GPO 19)
S_DATA (GPO 20)
S_CLK (GPO 21)
RF_PWR_DWN(GPO 4) Power down Input
Control LCD backlight level in 16 steps
Control LCD LED
PAM Band Select
Antenna switch Band Select
Antenna switch Band Select
Antenna switch Band Select
RF LDO Enable/Disable
PAM Enable/Disable
PLL Enable/Disable
Serial Data to PLL
Clock to PLL
Table 3-4. RF CONTROL SIGNALS DESCRIPTION
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3. TECHNICAL BRIEF
Description
Description