Page 1 Internal Use Only Service Manual KC780 Date: January, 2009 / Issue 1.1...
Page 2 REVISED HISTORY Editor Date Issue Contents of Changes S/W Version Y.G.KIM 08/27 Copyright © 2008 LG Electronics. Inc. All right reserved. - 3 - LGE Internal Use Only Only for training and service purposes...
Page 4: Table Of Contents
4.1 Main PCB component placement ........67 5. TROUBLE SHOOTING ........71 5.1 Trouble shooting test setup ........71 5.2 Power on Trouble ............72 Copyright © 2008 LG Electronics. Inc. All right reserved. - 5 - LGE Internal Use Only Only for training and service purposes...
Page 6: Only For Training And Service Purposes
LG Electronics ◆ OPLL Offset Phase Locked Loop ◆ PAM Power Amplifier Module ◆ PCB Printed Circuit Board Copyright © 2008 LG Electronics. Inc. All right reserved. - 7 - LGE Internal Use Only Only for training and service purposes...
Page 7: Only For Training And Service Purposes
◆ VCTCXO Voltage Control Temperature Compensated Crystal Oscillator ◆ WAP Wireless Application Protocol ◆ 8PSK 8 Phase Shift Keying LGE Internal Use Only - 8 - Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 8: Introduction
A local telephone company may make changes in its communications facilities or procedure. If these changes could reasonably be expected to affect the use of the KC780 or compatibility with the network, the telephone company is required to give advanced written notice to the user, allowing the user to take appropriate steps to maintain telephone service.
Page 9: Only For Training And Service Purposes
1. INTRODUCTION 1.2.4. Maintenance Limitations Maintenance limitations on the KC780 must be performed only at the LGE or its authorized agents. The user may not make any changes and/or repairs expect as specifically noted in this manual. Therefore, note that unauthorized alternations or repair may affect the regulatory status of the system and may void any remaining warranty.
Page 10: Performance
HR/EFR/FR/AMR Data and Fax Vibrator Buzzer Voice Recoding C-Mic Receiver Travel Adapter Options Bluetooth hands-free kit, Data Kit Copyright © 2008 LG Electronics. Inc. All right reserved. - 11 - LGE Internal Use Only Only for training and service purposes...
Page 11: Technical Speciﬁ Cation
20 dBm ±3dB 4 dBm ±4dB 18 dBm ±3dB 2 dBm ±5dB 16 dBm ±3dB 0 dBm ±5dB LGE Internal Use Only - 12 - Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 12: Only For Training And Service Purposes
1,200 1,800 Output RF Spectrum (due to switching transient) DCS1800/PCS1900 Offset from Carrier (kHz) Max. (dBm) 1,200 1,800 Copyright © 2008 LG Electronics. Inc. All right reserved. - 13 - LGE Internal Use Only Only for training and service purposes...
Page 13: Only For Training And Service Purposes
Stability Margin > 6 dB Distortion dB to ARL (dB) Level Ratio (dB) 17.5 22.5 30.7 33.3 33.7 LGE Internal Use Only - 14 - Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 14: Only For Training And Service Purposes
Battery Bar Number Voltage (±0.05V) 3.76V~4.2V Battery Indicator 3.68V~3.75V 3.55V~3.65V 3.41V~ 3.58V↓±0.05V (Call) Low Voltage Warning 3.51V↓±0.05V (Standby) Copyright © 2008 LG Electronics. Inc. All right reserved. - 15 - LGE Internal Use Only Only for training and service purposes...
Page 15: Only For Training And Service Purposes
16dBm ±3dB 0dBm ±5dB Output RF Spectrum EGSM (due to modulation) Offset from carrier(kHz) Max. dBc +0.5 600~<1,200 LGE Internal Use Only - 16 - Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 16: Only For Training And Service Purposes
1,200 Output RF Spectrum 1,800 (due to switching transient) DCS1800, PCS1900 Offset from carrier(kHz) Max. dBm 1,200 1,800 Copyright © 2008 LG Electronics. Inc. All right reserved. - 17 - LGE Internal Use Only Only for training and service purposes...
Page 17: Technical Brief
3. TECHNICAL BRIEF III-1 Baseband circuit 3.1. KC780 Component Block diagram. KC780 is composed with 5 different PCB part such as main PCB, Key PCB, Key FPCB, LCD FPCB and Flash FPCB The functional component arrangement is mentioned below diagram.
Page 18: Main Chip Introduction
EDGE-enabled feature phones with a standard set of multimedia applications such as: • Still picture imaging up to 2 MPixel Copyright © 2008 LG Electronics. Inc. All right reserved. Copyright © 2008 LG Electronics. Inc. All right reserved. - 19 -...
Page 19: Only For Training And Service Purposes
The S-GOLDradio as a single chip solution acting as a multifunctional engine in a complete mobile phone platform. LGE Internal Use Only - 20 - Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 20: Baseband Part Introduction
• IrDA Controller Supports Infrared SIR Mode Transceivers • RS-232 over a 16C550 compliant UART • MMC/SD Memory Card Interface Copyright © 2008 LG Electronics. Inc. All right reserved. - 21 - LGE Internal Use Only Only for training and service purposes...
Page 21: Only For Training And Service Purposes
JPEG pictures and H.263 or MPEG-4 videos can be sent or received as MMS by means of (E)GPRS. LGE Internal Use Only - 22 - Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 22: Only For Training And Service Purposes
IC interface module. The display and camera are connected to the multimedia IC, which contains functions (in HW and/or SW) to process still images and video data. This configuration is intended for Copyright © 2008 LG Electronics. Inc. All right reserved. - 23 -...
Page 23: Only For Training And Service Purposes
FEM control PAEN PA_EN PAM Power on VRAMP TX_RAMP 3.3.4. USART Interface KC780 have a UART Driver as follow : - USART1 : Hardware Flow Control / SW upgrade / Calibration Table 3 USART Interface Spec. USART_0(USART1) Resource Name Remark...
Page 24: Only For Training And Service Purposes
Remote control key detect 3.3.6. GPIO map Over a hundred allowable resources, KC780 is using as follows except dedicated to SIM and Memory. KC780 GPIO(General Purpose Input/Output) Map, describing application, I/O state, and enable level, is shown in below table.
Page 25: Only For Training And Service Purposes
DIF_RD MM_RD DIF_HD MM_INT DIF_VD BT_INT DIF_RESET1_GPIO HOOK_DETECT #I2C I2C_SCL I2C_SCL I2C_SDA I2C_SDA PM_INT NONE #Chip Card (USIM1) LGE Internal Use Only - 26 - Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 26: Only For Training And Service Purposes
MIC2_P HS_MIC_P VMIC VMIC #Measurement BAT_ID RF_TEMP JACK_TYPE VBAT LOAD REMOTE_ADC #Bandgap reference: Analog Interface VREF2 IREF2 #JTAG Copyright © 2008 LG Electronics. Inc. All right reserved. - 27 - LGE Internal Use Only Only for training and service purposes...
Page 27: Only For Training And Service Purposes
#Extra I/Os & Interrupt Inputs DSPIN0 CLK32K DSPIN1 CHG_EOC #Digital Power supply VDD_MAIN VSD1_1V5 VSS_MAIN VDDP_EBU1 VSD2_1V8 VSSP_EBU NONE VDDP_DIG NONE LGE Internal Use Only - 28 - Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 28: Only For Training And Service Purposes
26M_BT #Reference Oszillator / PLL REFR 26MHz 26MHz #Power Supply VDDTX VRF3_2V85 VDDVCO VRF3_2V85 VDDTRX VRF2_1V5 VDDDIG VRF3_2V85 Copyright © 2008 LG Electronics. Inc. All right reserved. - 29 - LGE Internal Use Only Only for training and service purposes...
Page 29: Only For Training And Service Purposes
VSIM VSIM_2V8 VBAT_LDO2 VBAT VSS_LDO2 VPLL VPLL_1V5 VRF2 VRF2_1V5 VDD_RF2PLL VBAT VRF1 VRF1_2V85 VRF3 VRF3_2V85 VBAT_RF13 VBAT VSS_LDO3 LGE Internal Use Only - 30 - Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 30: Only For Training And Service Purposes
#Step Down Converter 2 (SD2) VBAT_SD2 VBAT VSD2 VSD2_1V8 SD2_FB VSD2_1V8 SD2_FBL VSS_SD2 SD2_SD1_SUBST #Step Up Converter (SU1) SU_GATE SU_GND SU_FB Copyright © 2008 LG Electronics. Inc. All right reserved. - 31 - LGE Internal Use Only Only for training and service purposes...
Page 31: Power Management Unit
In addition, the S-GOLDradio PMU supports charging of the battery and generates the power-on reset. It also provides stand-by voltages and supports different low power modes. See Figure LGE Internal Use Only - 32 - Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 32: Only For Training And Service Purposes
• 3x PWM modulated control signal • Current Sink Support for photo flash LED driver • Support for serial connected LEDs Copyright © 2008 LG Electronics. Inc. All right reserved. - 33 - LGE Internal Use Only Only for training and service purposes...
Page 33: Only For Training And Service Purposes
• Independent LDO switch on • Software and hardware programmable voltages • System watchdog timer with on-chip oscillator. LGE Internal Use Only - 34 - Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 34: Only For Training And Service Purposes
7. Full charge indication current (icon stop current) : 100mA 8. Recharge voltage : 4.15V 9. Low battery alarm a. Idle : 3.58V~3.48V Copyright © 2008 LG Electronics. Inc. All right reserved. - 35 - LGE Internal Use Only Only for training and service purposes...
Page 35: Power On/Off
• After TE2 delay (settling of the DCXO) force signal I2C_INT to low. Comparator for VAUX voltage supervision is enabled • After TE3 (settling S-GOLDradio Power Management Unit GPIOs) RESET_N/RESET2_N are released LGE Internal Use Only - 36 - Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 36: Only For Training And Service Purposes
3. TECHNICAL BRIEF Figure 7 Power Up and Down Sequence triggered by ON_OFF1 Copyright © 2008 LG Electronics. Inc. All right reserved. - 37 - LGE Internal Use Only Only for training and service purposes...
Page 37: Only For Training And Service Purposes
Figure 8 Power supply start up VBAT R702 END_KEY VA713 ICVL0505101V150FR Figure 9 Remote power on and End-key power on circuit LGE Internal Use Only - 38 - Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 38: Sim Interface
Figure 10 Remote power on and End-key power on circuit 3.6. SIM interface KC780 supports 1.8V & 3V plug in SIM, SIM interface scheme is shown in (Figure 10). SIM_IO, SIM_CLK, SIM_RST ports are used to communicate with BBP(S-GOLDradio) and the SIM power supply enabled by BBP (_SIM_EN).
Page 40: Lcd Display
LCD module is connected to main board thru 37 pins connector. Table 6 LCD FPC Interface Spec. Pin No. Pin Name Description Ground Copyright © 2008 LG Electronics. Inc. All right reserved. - 41 - LGE Internal Use Only Only for training and service purposes...
Page 41: Only For Training And Service Purposes
LED Cathode MLED4 LED Cathode MLED3 LED Cathode MLED2 LED Cathode MLED1 LED Cathode MLED LED Anode Ground LGE Internal Use Only - 42 - Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 42: Keypad Switching & Scanning
The keypad interface is a peripheral which can be used for scanning keypads up to 5 rows (outputs from Port Control Logic) and 6 columns (inputs to PCL). The number of rows and columns depend on settings of the PCL. Copyright © 2008 LG Electronics. Inc. All right reserved. - 43 - LGE Internal Use Only...
Page 43: Only For Training And Service Purposes
Volume up & down, Clear, Send, End/Power on keys are located on the Key PCB. And MP3 hot key, Camera AF trigger & shutter, numeric keys are connected by Key FPCB. LGE Internal Use Only - 44 - Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 44: Keypad Back-Light Illumination
1X, 1.33X, 1.5X, or 2X mode, where the mode of operation is automatically selected by comparing the forward voltage of each LED with the input voltage. Copyright © 2008 LG Electronics. Inc. All right reserved. - 45 -...
Page 45: Only For Training And Service Purposes
Figure 18 LCD Back light unit and Key backlight charge pump IC Table 8 Charge pump IC LCD part current setting table LGE Internal Use Only - 46 - Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 47: Jtag Interface Connector
_EXTRST Figure 19 JTAG interface connector In case of KC780 mass production, the JTAG interface connector will not be mount on board. That is only for developing and software debugging purpose.( It will not be mounted on mass production PCB)
Page 48: Audio
3. TECHNICAL BRIEF 3.13. Audio KC780 Audio signal flow diagram as following diagram. Figure 20 Audio signal flow diagram 3.13.1. Audio amplifier sub system IC with Codec The WM8990 is an ultra-low power hi-fi Codec designed for multimedia handsets. A powerful 1W speaker driver can operate in class D or AB modes, providing total flexibility to the system designer.
Page 49: Only For Training And Service Purposes
SPK_P COM2 SPK_EAR_N SPK_EAR_P COM1 SPK_SEL SPK_SEL EAR_N EAR_P R227 200K Figure 22 Audio signal distribute analog switch LGE Internal Use Only - 50 - Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 50: Only For Training And Service Purposes
SPM0204HE5-PB-3 C603 C606 C604 C605 2.2u Figure 23 Microphone circuit Figure 24 S-GOLDradio Audio Front End Block Diagram Copyright © 2008 LG Electronics. Inc. All right reserved. - 51 - LGE Internal Use Only Only for training and service purposes...
Page 51: Only For Training And Service Purposes
3. TECHNICAL BRIEF Figure 25 S-GOLDradio Audio Front End Circuit LGE Internal Use Only - 52 - Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 52: Usb Charging Circuit
CHG_EOC _CHG IVDC CHG_EN IMIN IUSB R420 C413 C414 5.1K R421 R419 C415 Figure 26 USB charging circuit Copyright © 2008 LG Electronics. Inc. All right reserved. - 53 - LGE Internal Use Only Only for training and service purposes...
Page 53: Bluetooth
• Common TX/RX teminal simplifies external matching, eliminates external antenna switch • No external trimming is required In production • Bluetooth v2.0 + EDR Specification compliant LGE Internal Use Only - 54 - Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 54: Only For Training And Service Purposes
• I2C slave for FM • Two audio PCM interfaces (input and output) • Analogue stereo (output only) Copyright © 2008 LG Electronics. Inc. All right reserved. - 55 - LGE Internal Use Only Only for training and service purposes...
Page 55: Fm Radio
• Control of FM via Bluetooth HCI or I2C • Adaptive filter to suppress narrow band interference in the FM channel LGE Internal Use Only - 56 - Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 56: Micro Sd External Memory Card Slot
Data bit [3] Command response Power Power supply Clock Ground Power ground DAT0 Data bit [0] DAT1 Data bit [1] Copyright © 2008 LG Electronics. Inc. All right reserved. - 57 - LGE Internal Use Only Only for training and service purposes...
Page 57: Only For Training And Service Purposes
R414 MMC_DETECT VIO_2V62 R415 100K C406 C407 C408 1000p Figure 30 Micro SD socket circuit with power control LGE Internal Use Only - 58 - Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 58: 18Pin Multi Media Interface Connector
Charger voltage VCHG Charger voltage VBUS_USB USB VBUS UART_TX Trace TX data(Debug) UART_RX Trace RX data(Debug) Power GND Copyright © 2008 LG Electronics. Inc. All right reserved. - 59 - LGE Internal Use Only Only for training and service purposes...
Page 59: Only For Training And Service Purposes
REMOTE_ADC HSD1- R312 USB_DM HSD2- R313 HSO_L C319 R314 HSO_R AXT520124 C321 Figure 31 MMI 18pin connector circuit LGE Internal Use Only - 60 - Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 60: General Description
RF receiving and two outputs for PAM input for High/Low band. A direct conversion receiver and a quad-band polar transmitter for GSM and EDGE with integrated PGA functionality. Figure 32. PMB 6272 Function Block Diagram Copyright © 2008 LG Electronics. Inc. All right reserved. - 61 - LGE Internal Use Only...
Page 61: Receiver Part
No inter-stage filtering is needed. The orthogonal LO signals are generated by a divider-by-four for GSM850/900 band and a divider-by-two for the DCS1800/PCS1900 band. Down conversion to baseband LGE Internal Use Only - 62 - Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 62: Transmitter Part
In 8PSK mode, the ramping functionality is assured by an on-chip ramping generator, whereas output power is controlled by the PGA’s as described above. Figure 35. Transmitter Architecture Block Diagram Copyright © 2008 LG Electronics. Inc. All right reserved. - 63 - LGE Internal Use Only...
Page 63: Rf Synthesizer
Implemented in the Transceiver are two outputs for direct control of front end modules with two logic input pins to select RX- and TX-mode as well as low- and high band operation. LGE Internal Use Only - 64 - Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 64: Only For Training And Service Purposes
2.7p 5.6p 5.6p 8.2p 8.2p L507 L506 L505 L508 15nH 3.9nH 18nH 3.3nH Figure 36. FEM Circuit Diagram Copyright © 2008 LG Electronics. Inc. All right reserved. - 65 - LGE Internal Use Only Only for training and service purposes...
Page 65: Power Ampliﬁ Er Module
VRAMP controls the output power for GMSK modulation and provides bias optimization for EDGE modulation depending on the state of MODE control. LGE Internal Use Only - 66 - Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 66: Pcb Layout
4.1 Main PCB component placement (TBD) MOTOR Mobile Switch Antenna Baseband SIM/MicroSD Sub PMIC Charging Main PCB Top Copyright © 2008 LG Electronics. Inc. All right reserved. - 67 - LGE Internal Use Only Only for training and service purposes...
Page 67: Only For Training And Service Purposes
4. PCB layout Camera connector 18pin I/O Audio AMP Bluetooth MEMORY Accel MMIC Sensor Battery Connector Main PCB bottom LGE Internal Use Only - 68 - Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 68: Only For Training And Service Purposes
4. PCB layout LCD connector LCD Back light Charge pump KEY PCB Bottom Dome KEY PCB TOP Copyright © 2008 LG Electronics. Inc. All right reserved. - 69 - LGE Internal Use Only Only for training and service purposes...
Page 69: Only For Training And Service Purposes
Speaker/Receiver battery Flash LED Speaker/Receiver Flash LED Charge pump F-LCD TOP F-LCD TOP F-SOCKET F-LCD Bottom LGE Internal Use Only - 70 - Copyright © 2008 LG Electronics. Inc. All right reserved. F-LCD Bottom Only for training and service purposes...
Page 70: Trouble Shooting
-Connect mobile switch cable between Communication test set and DUT when you need to make a phone call. -Follow trouble shooting procedure Copyright © 2008 LG Electronics. Inc. All right reserved. - 71 - LGE Internal Use Only Only for training and service purposes...
Page 71: Power On Trouble
2SC5663 3.3M R410 RPWRON C405 3.3M END_ 2.2u Q403 END_KEY_IN 2SC5663 END_KEY_IN KP_IN(6) R411 Q402 END_KEY 2SC5663 KP_OUT(0) LGE Internal Use Only - 72 - Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 72: Only For Training And Service Purposes
Is it correct? Is the 26MHz clock from Check solder X101 of U104 ? Replace X-TAL Replace main PCB Copyright © 2008 LG Electronics. Inc. All right reserved. - 73 - LGE Internal Use Only Only for training and service purposes...
Page 74: Charging Trouble
FL305 FL306 FL307 17 : D/ RX EVSC5S04F050 EVSC5S04F050 EVSC5S04F050 C127 220n P3 3 P3 3 P3 3 Copyright © 2008 LG Electronics. Inc. All right reserved. - 75 - LGE Internal Use Only Only for training and service purposes...
Page 75 D101 charging until Battery voltage battery is over 3.35V? Voltage goes up to 3.35V Charge is operating properly LGE Internal Use Only - 76 - Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 76: Lcd Display Trouble
INOUT_A3 DIF_D(13) DIF_D(14) INOUT_B2 INOUT_A2 DIF_D(15) INOUT_B1 INOUT_A1 C316 C314 FL303 TP1 TP2 TP3 Check connection of F-LCD Copyright © 2008 LG Electronics. Inc. All right reserved. - 77 - LGE Internal Use Only Only for training and service purposes...
Page 77 5. TROUBLE SHOOTING Check connection of connector Check insulators Check connection of F-LCD FPCB connector LGE Internal Use Only - 78 - Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 78 CN301 On CN301 Signals are normal in DIF_CD(TP1),CS(TP2) Check solder and ,WR(TP3), repair FL303 On CN301 Assemble Copyright © 2008 LG Electronics. Inc. All right reserved. - 79 - LGE Internal Use Only Only for training and service purposes...
Page 79: Camera Trouble
ICVE10184E070R100FR FL202 CAM_MCLK 1V8_VDD_SD CAM_DCK 1V2_VDD_L C273 C274 0.1u C275 C276 0.1u Camera F-CAM MAIN PCB module FPCB LGE Internal Use Only - 80 - Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 80 Check the power Replace the Main lines of T1-T4 Replace the U202, U204 on the Main PCB Assemble Copyright © 2008 LG Electronics. Inc. All right reserved. - 81 - LGE Internal Use Only Only for training and service purposes...
Page 81: Receiver & Speaker Trouble
VBAT C254 C255 0.1u U206 NLAS5223BMNR2G SPK_N SPK_P COM2 SPK_EAR_N SPK_EAR_P COM1 SPK_SEL SPK_SEL EAR_N EAR_P R227 200K LGE Internal Use Only - 82 - Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 82 Replace Receiver Signal High(1.6V)? TP1 Signal (C242,C241) Replace the F-LCD FPCB Assemble Output Signal (U206 pin 3/pin 9) Copyright © 2008 LG Electronics. Inc. All right reserved. - 83 - LGE Internal Use Only Only for training and service purposes...
Page 83: Microphone Trouble
(C603, C604) Check the Connect the F-KEY connection of FPCB or replace it. F-KEY FPCB Replace Main PCB LGE Internal Use Only - 84 - Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 84: Ear-Mic Jack Detection Trouble
Solder FB308 again low? The main board has a problem Replace Main PCB Assemble Ear-Jack Signal FB308 CN302 Copyright © 2008 LG Electronics. Inc. All right reserved. - 85 - LGE Internal Use Only Only for training and service purposes...
Page 85: Vibrator Trouble
Check the voltage Solder again or difference of TP1 &TP2 Replace U101 on is 3V? Socket FPCB Replace Vibrator Assemble LGE Internal Use Only - 86 - Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 86: Keypad Back Light Trouble
WPWMIN LCD_PWM C711 FLASHCNT FLASHCNT R716 R717 TP700 C709 2.2u Slide Key Matrix and LEDs on KEY PCB Copyright © 2008 LG Electronics. Inc. All right reserved. - 87 - LGE Internal Use Only Only for training and service purposes...
Page 87: Key Backlight
VREF1 VREF2 IREF2 C145 220n C146 R126 TP116 PO_RESET PWRON KEY_BL Numeric Key Matrix and LEDs on F-KEY LGE Internal Use Only - 88 - Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 88 Check BATTERY F-KEY)&MLED-TP4 (on KEY PCB) Check GPIO Replace U104(SGR) signal(KEY_BL-TP2&SU & U101(BD6095) B_KEY_BL-TP1 Voltage KEY_LED is operating Copyright © 2008 LG Electronics. Inc. All right reserved. - 89 - LGE Internal Use Only Only for training and service purposes...
Page 89: Sim & Usd Trouble
S401 MMC_CLK GND2 GND3 MMC_D(0) GND4 MMC_D(1) GND5 GND6 R414 MMC_DETECT VIO_2V62 R415 100K C406 C407 C408 1000p LGE Internal Use Only - 90 - Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 91 1.8V & 2.9V SIM only Resolder S401 soldered connector well? Resolder Check connector TP1(2V8),TP2 Replace Main Check Proper Board SIM Card Assemble LGE Internal Use Only - 92 - Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 92 (check data line Detect pins(TP4) MicroSD D0~D3 is works well 2.9V Signal) Check proper Replace Main Board MicroSD? Assemble Copyright © 2008 LG Electronics. Inc. All right reserved. - 93 - LGE Internal Use Only Only for training and service purposes...
Page 93: Rf Troubleshooting
Check DCXO Circuit Check RF Switch Circuit General function is OK. Fig 1 Troubleshooting flowchart of general circuits LGE Internal Use Only - 94 - Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 94 Output voltage (=LDO output of U104) check LDO output voltage of U102 I.e. VRF1_2V85 (TP1), VRF2_1V5 (TP2), VRF3_2V85 (TP3) Copyright © 2008 LG Electronics. Inc. All right reserved. - 95 - LGE Internal Use Only Only for training and service purposes...
Page 95 REFR GND2 HOT2 GND1 2 HOT1 26MHz SIM_IO CC_IO SIM_CLK CC_CLK SIM_RST CC_RST Fig 5 DCXO circuit (X100) LGE Internal Use Only - 96 - Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 96 SW500: Mobile Switch (RF S/W) Connector U104: Baseband Processor including RF transceiver Check point of RF S/W (Mobile S/W) Copyright © 2008 LG Electronics. Inc. All right reserved. - 97 - LGE Internal Use Only Only for training and service purposes...
Page 97 5.6p 8.2p 8.2p L507 L506 L505 L508 15nH 3.9nH 18nH 3.3nH SW500 Fig 8 RF S/W circuit (U501) LGE Internal Use Only - 98 - Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 98: Rf Receiver Path Troubleshooting
General Circuits Troubleshooting Check FEM Circuit After download S/W, Calibrate it. Fig 9 Troubleshooting flowchart of RF Receiver path Copyright © 2008 LG Electronics. Inc. All right reserved. - 99 - LGE Internal Use Only Only for training and service purposes...
Page 99 Check point of FEM R501 C501 Control Signal of FEM R502 0.01u C502 U502 LMSP43NA-782 U501 Fig 11 FEM circuit (U501) LGE Internal Use Only - 100 - Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 100 When GSM band called, it must seem as below. (yellow is TP1, blue is TP2) When D/PCS band called, it must seem as below. (yellow is TP1, blue is TP2) Copyright © 2008 LG Electronics. Inc. All right reserved. - 101 -...
Page 101: Rf Transmitter Path Troubleshooting
Check Replace Control signal of After download S/W, Calibrate it. Fig 12 Troubleshooting flowchart of RF Transmitter path LGE Internal Use Only - 102 - Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 102: Pam Circuit
- For GMSK operation, set the PA_EN input High, and PA_MODE low(0.5v) Operational status PA_EN PA_BAND PA_MODE TX_RAMP Standby/PA off Low Band GMSK Tx Active Low Band EDGE Tx Copyright © 2008 LG Electronics. Inc. All right reserved. - 103 - LGE Internal Use Only Only for training and service purposes...
Page 103 Check the next part Fig 14 Debugging flowchart of PAM circuit When EGSM band called, it must seem as below. LGE Internal Use Only - 104 - Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 104 5. TROUBLE SHOOTING PA_MODE2 PA EN TX_RAMP PA_BAND PA_MODE When D/PCS band called, it must seem as below. Copyright © 2008 LG Electronics. Inc. All right reserved. - 105 - LGE Internal Use Only Only for training and service purposes...
Page 105 1000p 100p 100p 100p 820p Fig 15 PAM circuit (U500) 5.14.3 FEM Circuit See the 1.2.1 FEM Circuit. LGE Internal Use Only - 106 - Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 106: Download & S/W Upgrade
6.1 Download program user guide 1.After ‘‘GSMULTI’’ folder copy, paste C:\ 2. ‘‘MultiGSM.exe’’ execution file execute KC780 KC780 Copyright © 2008 LG Electronics. Inc. All right reserved. - 107 - LGE Internal Use Only Only for training and service purposes...
Page 107: Download Program User Guide
6. Download & S/W upgrade 6.2 Multi-Download Program Setting(Model-Base) ■ Multi-Download Program Execution Setting : Configuration ■ Setting Completed KC780 KC780 LGE Internal Use Only - 108 - Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 108 6. Download & S/W upgrade ■ Stand-by Condition: ‘‘Wait phone connecting’’ confirm Phone connection KC780 KC780 Copyright © 2008 LG Electronics. Inc. All right reserved. - 109 - LGE Internal Use Only Only for training and service purposes...
Page 109: Block Diagram
7. BLOCK DIAGRAM 7. BLOCK DIAGRAM LMSP43NA-7 8bit parallel I/F 2012 module LGE Internal Use Only - 110 - Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 110: Circuit Diagram
ON_SW RPWRON_EN VBAT VBAT VBAT VBUS_USB URXD USB_DM UTXD USB_DP Add GPIO for Charging Trouble I2C_SDA I2C_SCL LGMC Copyright © 2008 LG Electronics. Inc. All right reserved. - 111 - LGE Internal Use Only Only for training and service purposes...
Page 111 INOUT_B4 CAM_D1 FL203 ICVE10184E070R100FR ICVE10184E070R100FR FL202 CAM_MCLK 1V8_VDD_SD CAM_DCK 1V2_VDD_L C273 C274 0.1u C275 C276 0.1u LGMC LGMC LGE Internal Use Only - 112 - Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 112 MIC_N C322 C323 CAM_STRB R351 PA_EN_LED MIC_P 2200p 0.1u C326 2.2u Change Connector For Expanding Placement Area LGMC Copyright © 2008 LG Electronics. Inc. All right reserved. - 113 - LGE Internal Use Only Only for training and service purposes...
Page 113 C412 2.2u CN401 C409 IMIN IUSB R420 C413 C414 5.1K R421 R419 C415 Change Connector For SMT LGMC LGE Internal Use Only - 114 - Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 114 C543 1.5p FB502 C544 BT_INT R523 TP507 BT_VCXO_EN C545 C546 C547 2.2u 2.2u 0.01u BT_RESET C548 VIO_2V62 LGMC Copyright © 2008 LG Electronics. Inc. All right reserved. - 115 - LGE Internal Use Only Only for training and service purposes...
Page 115 MLED C710 R711 R712 LD700 LD701 R713 SUB_KEY_BL R714 12K Q700 UPPER_KEY_BL KTC4075E R715 C711 R716 R717 LGMC LGE Internal Use Only - 116 - Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 116 CAM_HS 1V8_VDD_IO CAM_XRST CAM_STRB CAM_TRIG CAM_D6 CAM_D7 CAM_D4 CAM_D5 CAM_D2 CAM_D3 CAM_D0 CAM_D1 CAM_MCLK 1V8_VDD_SD CAM_DCK 1V2_VDD_L LGMC Copyright © 2008 LG Electronics. Inc. All right reserved. - 117 - LGE Internal Use Only Only for training and service purposes...
Page 117 EVLC14S02050 R608 FLIP_OPEN VBAT C614 U600 C607 0.1u BU52031NVX 0.1u LEWWS44-E LD600 KEY_BL R609 R610 LEWWS44-E LD601 LGMC LGE Internal Use Only - 118 - Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 118 DIF_VSYNC DIF_D(10) DIF_RESET DIF_D(11) BL_RESETB DIF_D(12) I2C_SDA DIF_D(13) I2C_SCL DIF_D(14) FLASHCNT DIF_D(15) DTX0 LCD_ID DTX1 END_KEY DTX3 LGMC Copyright © 2008 LG Electronics. Inc. All right reserved. - 119 - LGE Internal Use Only Only for training and service purposes...
Page 119 AAT1271IWO-T1 RESET TORCH_EN EN_SET FLOUTA CAM_STRB FLEN FLGND AGND FLOUTB LD101 FLINH PA_EN_LED C106 PGND C108 2.2u LGMC LGE Internal Use Only - 120 - Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 126: Pcb Layout
Main-Key B to B connector CN401 Can’t operate MIC and Battery connector keys No power on U205 Multimedia Chip No display Copyright © 2008 LG Electronics. Inc. All right reserved. - 127 - LGE Internal Use Only Only for training and service purposes...
Page 127 Main-Socket B to B Can’t operate camera connector Can’t operate Camera Flash and vibrator U401 ISL9221, Charging IC Can’t charge LGE Internal Use Only - 128 - Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 129 Slide key-Main B to B connector U700 No power on LCD backlight charge No LCD display pump No sound No LCD display LGE Internal Use Only - 130 - Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 136: Rf Calibration
11.1. Test Equipment Setup 4.00 V 0.000 A 11.2. Calibration Step 2.1. Turn on the Phone. 2.2. Execute “ HK_30.exe” Copyright © 2008 LG Electronics. Inc. All right reserved. - 137 - LGE Internal Use Only Only for training and service purposes...
Page 137 11. RF Calibration 2.3. Click “ SETTING” Menu 2.4. Setup “ Ezlooks” menu such as the following figure LGE Internal Use Only - 138 - Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 138 1. By-Pass: not control by GPIB 2. Normal : control by GPIB PWR : Power Supply CELL :Call-Test Equipment Setup UART Port Copyright © 2008 LG Electronics. Inc. All right reserved. - 139 - LGE Internal Use Only Only for training and service purposes...
Page 139 11. RF Calibration 2.7. Select “ MODEL” . 2.8. Click “ START” for RF calibration 2.9. RF Calibration finishes. LGE Internal Use Only - 140 - Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 140 TX Channel compensation: EGSM->DCS->PCS->EDGE EGSM->EDGE DCS->EDGE PCS RX Channel compensation: EGSM->DCS->PCS 4. Phone Operation Mode > < Normal Mode < Ptest Mode> Copyright © 2008 LG Electronics. Inc. All right reserved. - 141 - LGE Internal Use Only Only for training and service purposes...
Page 141: Stand-Alone Test
③Confirm EEPROM & Delta file prefix name.(mpelite) ① ② ③ Click “Update Info” for communicating Phone and Test -Program. ④ LGE Internal Use Only - 142 - Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 142 Standalone Test, Change the Phone to “ptest mode” and then Click the “Reset” ⑤ bar. ⑥ Select “Non signaling” in the Quick Bar menu. Then Standalone Test setup is finished. Copyright © 2008 LG Electronics. Inc. All right reserved. - 143 - LGE Internal Use Only Only for training and service purposes...
Page 143: Tx Test
Select “Tx” in the RF mode menu and “PCL” in the PA Level menu. ③ Finally, Click “ Write All” bar and try the efficiency test of Phone. ④ LGE Internal Use Only - 144 - Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 144: Rx Test
“normal mode” after finishing Test. ④ Change the Phone to “normal mode” and then Click the “Reset” bar. ⑤ Copyright © 2008 LG Electronics. Inc. All right reserved. - 145 - LGE Internal Use Only Only for training and service purposes...
Page 146: Engineering Mode
[6-9] FM Radio [3-7] MemAllUse [6-9-1] FM Radio Test [3-8] MemDetUse [6-10] Touchpad Test [3-9] MemDump [3-10] Change Frequency Band Copyright © 2008 LG Electronics. Inc. All right reserved. - 147 - LGE Internal Use Only Only for training and service purposes...
Page 148: Exploded View & Replacement Part List
14. EXPLODED VIEW & REPLACEMENT PART LIST Copyright © 2008 LG Electronics. Inc. All right reserved. - 149 - LGE Internal Use Only Only for training and service purposes...
Page 150: Replacement Parts
MLAB0001102 C2000 USASV DIA 4.0 White Without MLCE00 LENS,FLASH MLCE0010201 MOLD, PMMA HI835S, , , , , Color Copyright © 2008 LG Electronics. Inc. All right reserved. - 151 - LGE Internal Use Only Only for training and service purposes...
Page 151 MPBU0041401 COMPLEX, (empty), , , , , Color Without MPBZ00 MPBZ0222001 COMPLEX, (empty), , , , , Color LGE Internal Use Only - 152 - Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 152 COMPLEX, (empty), , , , , Color Without MCBA00 CAN,SHIELD MCBA0036401 PRESS, STS, , , , , Color Copyright © 2008 LG Electronics. Inc. All right reserved. - 153 - LGE Internal Use Only Only for training and service purposes...
Page 153 Level Description Part Number Spec Color Remark Without MCBA01 CAN,SHIELD MCBA0036301 PRESS, STS, 0.2, , , , Color LGE Internal Use Only - 154 - Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 154: Main Component
UNIT ,42 dB,3.76*2.95*1.1 ,MEMS mic ,; , , ,OMNI MIC601 MICROPHONE SUMY0010608 ,[empty] , ,[empty] R602 RES,CHIP,MAKER ERHZ0000505 680 ohm,1/16W ,J ,1005 ,R/TP Copyright © 2008 LG Electronics. Inc. All right reserved. - 155 - LGE Internal Use Only Only for training and service purposes...
Page 155 1 uF,6.3V ,K ,X5R ,TC ,1005 ,R/TP L100 RES,CHIP,MAKER ERHZ0000401 0 ohm,1/16W ,J ,1005 ,R/TP L101 RES,CHIP,MAKER ERHZ0000401 0 ohm,1/16W ,J ,1005 ,R/TP LGE Internal Use Only - 156 - Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 156 R703 RES,CHIP,MAKER ERHZ0000505 680 ohm,1/16W ,J ,1005 ,R/TP R704 CAP,CERAMIC,CHIP ECCH0004904 1 uF,6.3V ,K ,X5R ,TC ,1005 ,R/TP Copyright © 2008 LG Electronics. Inc. All right reserved. - 157 - LGE Internal Use Only Only for training and service purposes...
Page 157 SEVY0001001 14 V, ,SMD ,50pF, 1005 VA713 VARISTOR SEVY0003601 5.6 V, ,SMD ,100pF, 1005 PCB ASSY,KEYPAD,SMT SAED00 SAED0029701 LGE Internal Use Only - 158 - Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 158 ,MALE ,SMD ,[empty] , , L101 INDUCTOR,CHIP ELCH0001421 47 nH,J ,1005 ,R/TP ,PBFREE L102 INDUCTOR,CHIP ELCH0005009 100 nH,J ,1005 ,R/TP , Copyright © 2008 LG Electronics. Inc. All right reserved. - 159 - LGE Internal Use Only Only for training and service purposes...
Page 159 ECCH0000122 47 pF,50V,J,NP0,TC,1005,R/TP C205 CAP,CERAMIC,CHIP ECCH0006201 4.7 uF,6.3V ,K ,X5R ,TC ,1608 ,R/TP C206 CAP,CERAMIC,CHIP ECCH0000155 10 nF,16V,K,X7R,HD,1005,R/TP LGE Internal Use Only - 160 - Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 160 ECZH0003103 0.1 uF,10V ,K ,X7R ,HD ,1005 ,R/TP C265 CAP,CERAMIC,CHIP ECCH0004904 1 uF,6.3V ,K ,X5R ,TC ,1005 ,R/TP Copyright © 2008 LG Electronics. Inc. All right reserved. - 161 - LGE Internal Use Only Only for training and service purposes...
Page 161 CAP,TANTAL,CHIP ECTH0005202 ,[empty] , ,[empty] ,[empty] ,[empty] ,[empty] C321 CAP,CERAMIC,CHIP ECCH0000120 39 pF,50V,J,NP0,TC,1005,R/TP C322 CAP,CERAMIC,CHIP ECCH0000147 2.2 nF,50V,K,X7R,HD,1005,R/TP LGE Internal Use Only - 162 - Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 162 CONNECTOR,BOARD TO 20 PIN,0.4 mm,STRAIGHT , , ,; , ,0.40MM ,STRAIGHT CN305 ENBY0043701 BOARD ,FEMALE ,SMD ,[empty] , , Copyright © 2008 LG Electronics. Inc. All right reserved. - 163 - LGE Internal Use Only Only for training and service purposes...
Page 163 SFEY0010501 Pb-free FL305 VARISTOR SEVY0008302 5.5 V,30% ,SMD ,1409Size (4CH) FL306 VARISTOR SEVY0008302 5.5 V,30% ,SMD ,1409Size (4CH) LGE Internal Use Only - 164 - Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 164 100 Kohm,1/16W ,J ,1005 ,R/TP R135 RES,CHIP,MAKER ERHZ0000443 2200 ohm,1/16W ,J ,1005 ,R/TP R136 RES,CHIP,MAKER ERHZ0000443 2200 ohm,1/16W ,J ,1005 ,R/TP Copyright © 2008 LG Electronics. Inc. All right reserved. - 165 - LGE Internal Use Only Only for training and service purposes...
Page 165 12 ohm,1/16W ,J ,1005 ,R/TP R313 RES,CHIP,MAKER ERHZ0000235 200 ohm,1/16W ,F ,1005 ,R/TP R314 RES,CHIP,MAKER ERHZ0000235 200 ohm,1/16W ,F ,1005 ,R/TP LGE Internal Use Only - 166 - Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 166 ECZH0001216 220 nF,10V ,K ,X5R ,TC ,1005 ,R/TP C105 CAP,CHIP,MAKER ECZH0001215 1 uF,10V ,K ,X5R ,TC ,1005 ,R/TP Copyright © 2008 LG Electronics. Inc. All right reserved. - 167 - LGE Internal Use Only Only for training and service purposes...
Page 167 10000000 pF,6.3V ,M ,X5R ,TC ,1608 ,R/TP , , ,[empty] C142 CAP,CERAMIC,CHIP ECCH0005604 ,[empty] ,[empty] ,[empty] ,[empty] ,[empty] ,0.8 mm C143 CAP,CERAMIC,CHIP ECCH0000112 15 pF,50V,J,NP0,TC,1005,R/TP LGE Internal Use Only - 168 - Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 168 ECZH0001217 470 nF,6.3V ,K ,X5R ,TC ,1005 ,R/TP C261 CAP,CERAMIC,CHIP ECCH0000182 0.1 uF,10V ,K ,X5R ,HD ,1005 ,R/TP Copyright © 2008 LG Electronics. Inc. All right reserved. - 169 - LGE Internal Use Only Only for training and service purposes...
Page 169 ECZH0000846 8.2 pF,50V ,C ,NP0 ,TC ,1005 ,R/TP C515 CAP,CHIP,MAKER ECZH0000846 8.2 pF,50V ,C ,NP0 ,TC ,1005 ,R/TP LGE Internal Use Only - 170 - Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 170 L507 INDUCTOR,CHIP ELCH0012511 3.9 nH,S ,1005 ,R/TP ,chip coil L508 INDUCTOR,CHIP ELCH0012513 3.3 nH,K ,1005 ,R/TP ,Chip coil,1005 Copyright © 2008 LG Electronics. Inc. All right reserved. - 171 - LGE Internal Use Only Only for training and service purposes...
Page 171 R209 SAFP0000501 SHORT PCB ASSY,MAIN,PAD R212 SAFP0000501 SHORT PCB ASSY,MAIN,PAD R215 SAFP0000501 SHORT PCB ASSY,MAIN,PAD R216 SAFP0000501 SHORT LGE Internal Use Only - 172 - Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 172 100 pF,50V ,J ,NP0 ,TC ,1005 ,R/TP R508 INDUCTOR,CHIP ELCH0004720 1.2 nH,S ,1005 ,R/TP , R509 RES,CHIP,MAKER ERHZ0000434 1 ohm,1/16W ,J ,1005 ,R/TP Copyright © 2008 LG Electronics. Inc. All right reserved. - 173 - LGE Internal Use Only Only for training and service purposes...
Page 173 X102 X-TAL EXXY0024301 ,-40'C ~ +85'C, C0 1.05pF, C1 fF ,; ,32.768 ,20PPM ,12.5 , , ,SMD ,R/TP LGE Internal Use Only - 174 - Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 174 100-240V ,5060 Hz,5.1 V,.7 A,CE ,AC-DC ADAPTOR ,; 대치 ADAPTOR,AC-DC SSAD0025002 ,85Vac~264Vac ,5.1V +0.15V, -0.2V ,700mA ,5060 , ,WALL 2P ,I/O CONNECTOR , Copyright © 2008 LG Electronics. Inc. All right reserved. - 175 - LGE Internal Use Only Only for training and service purposes...

LG KC780 Service Manual

1 Introduction

2 Performance

3 Technical Brief

4 PCB Layout

5 Trouble Shooting

6 Download & S/W Upgrade

7 Block Diagram

8 Circuit Diagram

9 BGA Pin Map

10 Pcb Layout

11 RF Calibration

12 Stand-Alone Test

13 Engineering Mode

14 Exploded View & Replacement Part List

Quick Links

Troubleshooting

Related Manuals for LG KC780

Summary of Contents for LG KC780

Table of Contents