LG KG280 Service Manual - Page 23
C. RF interface
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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] Description Current source for backlight LED Control LCD backlight level in 16 steps This pins are returned-paths for backlight LED current source (MLED) 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) Description 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 LGE Internal Use Only - 24 - Copyright © 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes
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