Only For Training And Service Purposes - LG KG280 Service Manual

3. TECHNICAL BRIEF
The backlight of LCD module is controlled by AD6720 via AAT3157, U201. The control signals related
to Backlight LED are given bellow.
Signals
MLED
LCD_DIM_CTL
MLED[1:3]
Table 3-3. DESCRIPTION OF LCD BACKLIGHT LED CONTROL
C. RF interface
The AD6720 control RF parts through PA_BAND, ANT_SW1, ANT_SW2, ANT_SW3, CLKON,
PA_EN, S_EN, S_DATA, S_CLK
Signals
PA_BAND (GPO 17)
ANT_SW1 (GPO 9)
ANT_SW2 (GPO 10)
PA_EN (GPO 16)
S_EN (GPO 19)
S_DATA (GPO 20)
S_CLK (GPO 21)
LGE Internal Use Only
Current source for backlight LED
Control LCD backlight level in 16 steps
This pins are returned-paths for backlight LED current source (MLED)
PAM Band Select
Antenna switch Band Select
Antenna switch Band Select
PAM Enable/Disable
PLL Enable/Disable
Serial Data to PLL
Clock to PLL
Table 3-4. RF CONTROL SIGNALS DESCRIPTION
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Description
Description
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Only for training and service purposes