LG P7200 Service Manual page 26

The backlight of LCD module is controlled by DBB via AAT2806IXN-4.5-T1 , U402. The control
signals related to Backlight LED are given bellow.
Signals
LCD_DIM_CTL
(GPO 5)
LCD_LED_CTL
LCD_LED_GND
LCD_BL_EN
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 10)
ANT_SW3 (GPO 11)
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
It controls back-light of LCD module.(GPO_23)
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 CONTRON SIGNALS DISCRIPTION
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3. TECHNICAL BRIEF
Description
Description