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LG KF390 Service Manual
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LG KF390 Service Manual

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Internal Use Only
Service Manual
KF390
Date: June, 2008 / Issue 1.0

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Summary of Contents for LG KF390

  • Page 1 Internal Use Only Service Manual KF390 Date: June, 2008 / Issue 1.0...

  • Page 2: Circuit Diagram

    C1108 C1109 RX_W_2100 PWR_DET L1036 R1025 VREG_RF_2.85V 2.2nH C1111 PA_ON1 1000p Q1002 KRX102E LG(42)-A-5505-10:01 LG Electronics Inc. LGMC - 131 - Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 3 USIM PMIC MicroSD TP203 UART_TXD R213 2.2K TP204 VREG_CAM_AVDD_2.8V UART_RXD CAMERA 2.5G UART LG(42)-A-5505-10:01 LG Electronics Inc. LGMC - 132 - Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 4 VREG_S3 C353 C354 100p MOTOR_PWR- MOTOR_PWR_N D302 +VPWR C355 RB521S-30 OJ300 OJ301 100p LG(42)-A-5505-10:01 LG Electronics Inc. LGMC - 133 - Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 5 INOUT_A2 INOUT_B2 CAM_MCLK_F CAM_HSYNC INOUT_A3 INOUT_B3 CAM_HSYNC_OUT CAM_VSYNC INOUT_A4 INOUT_B4 CAM_VSYNC_OUT R426 FL407 LG(42)-A-5505-10:01 LG Electronics Inc. LGMC - 134 - Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 6 C509 EBI2_DATA(11) EBI2_DATA(12) EBI2_DATA(13) EBI2_DATA(14) EBI2_DATA(15) LCD_MAKER_ID VREG_MSMP_2.7V WLED_3 WLED_2 WLED_1 WLED_PWR PLW0501H-LF C510 0.1u INSTPAR ZD500 LGMC - 135 - Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 7 INOUT_A1 INOUT_B1 CAM_DATA_OUT(7) CAM_DATA_OUT(6) INOUT_A2 INOUT_B2 INOUT_A3 INOUT_B3 CAM_DATA_OUT(4) INOUT_A4 INOUT_B4 CAM_DATA_OUT(5) FPCB to VGA Camera Connector LGMC - 136 - Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 8 8. BGA IC PIN MAP < Bottom View > Used Unused U200 ( MSM6280 @ 409PIN - EUSY0295601) Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 137 - Only for training and service purposes...

  • Page 9: Bottom View

    8. BGA IC PIN MAP < Bottom view > Used Unused U301 (TY9000A800KOGG40 - EUSY0336902 ) LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. - 138 - Only for training and service purposes...
  • Page 10 8. BGA IC PIN MAP < Bottom view > Used Unused U302 (PM6658 - EUSY0350001 ) Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 139 - Only for training and service purposes...
  • Page 11 LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. - 140 - Only for training and service purposes...

  • Page 12: Pcb Layout

    No Vibration Not Operate Navigation Keypad No response with Touch Keypad No detect slide movement Keypad Backlight trouble - 141 - Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 13 No Service ( in WCDMA ) Tx Power No Service WCDMA Tx Power & Rx Sensitivity No Service - 142 - Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 14 9. PCB LAYOUT - 143 - Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 15 9. PCB LAYOUT No Display Keypad backlight fault No Display No response Touch Keypad No Touch Keypad No LCD Backlighting - 144 - Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 16 9. PCB LAYOUT No Display No response Touch Keypad - 145 - Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 17 9. PCB LAYOUT Not hear voice No operate VGA Camera No Vibration - 146 - Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...