Page 1 Service Manual KF305 Date: August, 2009 / Issue 1.0...
Page 2: Table Of Contents
4.11 Receiver Trouble........91 13.2 Replacement Parts ......155 4.12 Microphone Trouble ......93 13.3 Accessory ......... 168 4.13 SIM Card Interface Trouble....95 Copyright © 2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 3 - Only for training and service purposes...
Page 4: Introduction
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. Copyright © 2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 5 -...
Page 5: Only For Training And Service Purposes
• When returning system boards or parts like EEPROM to the factory, use the protective package as described. LGE Internal Use Only Copyright © 2009 LG Electronics. Inc. All right reserved. - 6 - Only for training and service purposes...
Page 6: Abbreviations
International Portable User Identity Intermediate Frequency Liquid Crystal Display Low Drop Output Light Emitting Diode OPLL Offset Phase Locked Loop Copyright © 2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 7 - Only for training and service purposes...
Page 7: Only For Training And Service Purposes
Time Division Multiple Access UART Universal Asynchronous Receiver/Transmitter Voltage Controlled Oscillator VCTCXO Voltage Control Temperature Compensated Crystal Oscillator Wireless Application Protocol LGE Internal Use Only Copyright © 2009 LG Electronics. Inc. All right reserved. - 8 - Only for training and service purposes...
Page 8: System Specification
Travel Adapter MIDI SW MIDI (Mono SPK) Camera Bluetooth / FM Radio Bluetooth version 2.0 / 76~108MHz supported Copyright © 2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 9 - Only for training and service purposes...
Page 9: Technical Specification
8 dBm 22 dBm 6 dBm 20 dBm 4 dBm 18 dBm 2 dBm 16 dBm 0 dBm LGE Internal Use Only Copyright © 2009 LG Electronics. Inc. All right reserved. - 10 - Only for training and service purposes...
Page 10: Only For Training And Service Purposes
6,000 GSM, EGSM Offset from Carrier (kHz) Max. [dBm] Output RF Spectrum (due to switching transient) 1,200 1,800 Copyright © 2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 11 - Only for training and service purposes...
Page 11: Only For Training And Service Purposes
*Mean that Adopt a straight line in between 300 Hz and 1,000 Hz to be Max. level in the range. LGE Internal Use Only Copyright © 2009 LG Electronics. Inc. All right reserved. - 12 - Only for training and service purposes...
Page 12: Only For Training And Service Purposes
3 → 2 Battery Indicator 3.75 0.05 V 2 → 1 3.64 0.05 V 1 → 0 3.54 0.05 V Copyright © 2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 13 - Only for training and service purposes...
Page 13: Only For Training And Service Purposes
Battery full charge voltage = 4.2 V Capacity: 800mAh Switching-mode charger Travel Charger Input: 100 ~ 350V, 50/60 Hz Output: 5.1 V, 700 mA LGE Internal Use Only Copyright © 2009 LG Electronics. Inc. All right reserved. - 14 - Only for training and service purposes...
Page 15: Only For Training And Service Purposes
Support for SRAM, SDRAM, and PSRAM (cellular RAM) Full-Speed USB 2.0 Dual-Role Interface with OTG (On-The-Go) Host Mode or traditional Peripheral- only mode LGE Internal Use Only Copyright © 2009 LG Electronics. Inc. All right reserved. - 16 - Only for training and service purposes...
Page 16: Only For Training And Service Purposes
Embedded Trace Macrocell for MCU Debug JTAG Interface for Test and In-Circuit Emulation of both the MCU and DSP Advanced features for security Copyright © 2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 17 - Only for training and service purposes...
Page 17: Analog Main Processor(Ad6855, U100)
GSM 900 / GSM 850 / DCS 1800 / PCS 1900 mobile on a single device, including HSCSD, GPRS and EGPRS. LGE Internal Use Only Copyright © 2009 LG Electronics. Inc. All right reserved. - 18 - Only for training and service purposes...
Page 18: General Description
The AD6855 digital processor interface provides serial ports for control data, baseband transmit and receive data, and two for audio data. Copyright © 2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only...
Page 19: Power Block
(see definitions below) and signals DBB software that it’s time to wake up and operate using the KEYOUT signal. Figure. 3-2-2 AD6855 POWER BLOCK DIAGRAM LGE Internal Use Only Copyright © 2009 LG Electronics. Inc. All right reserved. - 20 - Only for training and service purposes...
Page 20 3. TECHNICAL BRIEF Figure. 3-2-3 AD6855 KEYON/KEYOUT BLOCK DIAGRAM Figure. 3-2-4 AD6855 RESET GENERATION BLOCK DIAGRAM Copyright © 2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 21 - Only for training and service purposes...
Page 21 Charger Activation, Active-Standby or Active State the VABB regulator enable/disable is controlled by the information written to the VABBEn and AFCDACMode register bits by system software. LGE Internal Use Only Copyright © 2009 LG Electronics. Inc. All right reserved. - 22 - Only for training and service purposes...
Page 22 Baseband Analog regulator is optimized for high ripple rejection and low noise. The output of the Baseband Analog regulator should not be used as a supply for any external components. Copyright © 2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only...
Page 23 In this mode, VAPP is enabled or disabled using the VAPPEn bit of LDOControl1. LGE Internal Use Only Copyright © 2009 LG Electronics. Inc. All right reserved. - 24 - Only for training and service purposes...
Page 24: Power Amplifier Module(Sky77318, U601)
PA block supports the GSM bands and the other supports the DCS1800 and PCS1900 bands. Both PA blocks share common power supply pins to distribute current. Copyright © 2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 25 -...
Page 25: Fem (Dgm1110M014, Fl601)
The FEM is integrated of quadband RX SAWs, internal diplexer and ESD protection at Ant port to 8kV acc. LGE Internal Use Only Copyright © 2009 LG Electronics. Inc. All right reserved. - 26 - Only for training and service purposes...
Page 26: Rtc(Fc-135, X100)
32kHz clock for use in the system. The purpose of this application note is to discuss the system issues that affect operation of the 32kHz oscillator circuit. Copyright © 2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only...
Page 27: Crystal(26 Mhz, X601)
26MHz crystal. The crystal is connected as shown in figure 3-3. LGE Internal Use Only Copyright © 2009 LG Electronics. Inc. All right reserved. - 28 - Only for training and service purposes...
Page 29: Rf Tranceiver(Ad6548, U602)
The Receive path features automatic calibration and tracking to remove DC offsets. LGE Internal Use Only Copyright © 2009 LG Electronics. Inc. All right reserved. - 30 - Only for training and service purposes...
Page 30: Only For Training And Service Purposes
GPRS applications up to and including class 12. 3.7.2 FUNCTIONAL DESCRIPTION Figure. 3-7-2 RECEIVER CHAIN BLOCK DIAGRAM Copyright © 2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 31 - Only for training and service purposes...
Page 31: Only For Training And Service Purposes
2/3 multiplication of the VCO output for the high band (DCS1800/PCS1900) and a 1/3 multiplication for low band (E-GSM 900/GSM850). LGE Internal Use Only Copyright © 2009 LG Electronics. Inc. All right reserved. - 32 - Only for training and service purposes...
Page 32: Only For Training And Service Purposes
Transmit Intermediate Frequency (TX IF). After bandpass filtering and limiting the TX IF signal is used as the reference input to the Phase Frequency Detector (PFD) of the transmit PLL. Copyright © 2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only...
Page 33: Only For Training And Service Purposes
An integrated band pass filter exists between the mixer and the PFD to filter the mixers unwanted side band and higher order mixing products. LGE Internal Use Only Copyright © 2009 LG Electronics. Inc. All right reserved. - 34 - Only for training and service purposes...
Page 34: Only For Training And Service Purposes
The VCO generates frequencies between 2520MHz and 2985MHz as required to operate in the four GSM bands for RX and TX. Copyright © 2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only...
Page 35: Memory(Pf38F5060M0Y0Be, U202)
This Stacked Chip Scale Package (SCSP) device is packaged in a standard Intel® x16D footprint and signal ballout. This model uses 512Mbits Flash memory and 128Mbits LPSDRAM memory with stacked. LGE Internal Use Only Copyright © 2009 LG Electronics. Inc. All right reserved. - 36 - Only for training and service purposes...
Page 36: Only For Training And Service Purposes
Figure. 3-8-2 DBB EBU SUBSYSTEM BLOCK DIAGRAM The following table shows the pin list for the external memory interface which supported by Main Base Band chipset(AD6900). Copyright © 2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 37 -...
Page 37: Only For Training And Service Purposes
SDC Write Enable SDA10 SDC address 10 SDCKE SDC Clock Enable SDCLKOUT SDC Clock Output nNDBUSY NFC Busy Request LGE Internal Use Only Copyright © 2009 LG Electronics. Inc. All right reserved. - 38 - Only for training and service purposes...
Page 38: Bt Module With Integrated Fm Tuner
3.9 BT Module with integrated FM tuner (EWFMLBAXX, U201) Figure. 3-9-1 Bluetooth Module BLOCK DIAGRAM Figure. 3-9-2 BCM2048 POWER BLOCK DIAGRAM Copyright © 2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 39 - Only for training and service purposes...
Page 39: Only For Training And Service Purposes
RDS data buffers to simplify the interface with an external host. LGE Internal Use Only Copyright © 2009 LG Electronics. Inc. All right reserved. - 40 - Only for training and service purposes...
Page 40: Sim Card Interface
This signal makes SIM card to HW default status. SIM_CLK This signal is transferred to SIM card. SIM_DATA This signal is interface datum. Copyright © 2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 41 - Only for training and service purposes...
Page 41: Micro-Sd Card Interface
The bus interface contains 32- bit memory mapped registers, converts 16-bit PBUS accesses to 32-bit register accesses, LGE Internal Use Only Copyright © 2009 LG Electronics. Inc. All right reserved. - 42 - Only for training and service purposes...
Page 42: Lcd Interface
BLU (Back Light Unit) is shared primary and secondary LCD and include 5 white LEDs. White LCD driver is AAT3169 and it is descripted at next page. Copyright © 2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only...
Page 43: Only For Training And Service Purposes
A low-current shutdown feature disconnects the load from the input and reduces quiescent current to less than 1µA. LGE Internal Use Only Copyright © 2009 LG Electronics. Inc. All right reserved. - 44 - Only for training and service purposes...
Page 44: Only For Training And Service Purposes
Figure 3-12-4 AAT3169 Low Current Stage This model uses level 5 in maximum 20mA group and level 15 in low current mode. But it don’t use low current stage. Copyright © 2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 45 -...
Page 45: Battery Charger Interface
Due to the 28V rating for the cradle input, low-cost, large output tolerance adapters can be used safely. When both inputs are powered, the cradle input is used to charge the battery. LGE Internal Use Only Copyright © 2009 LG Electronics. Inc. All right reserved. - 46 - Only for training and service purposes...
Page 46: Keypad Interface
Outer Circle of Buttons HOT 1 HOT 2 HOT 3 HOT 4 KEY_COL3 KEY_COL4 KEY_ROW4 KEY_ROW5 Figure 3-14-2 HOT KEY STRUCTURE Copyright © 2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 47 - Only for training and service purposes...
Page 47: Only For Training And Service Purposes
Figure 3-14-3 keypad interface and interrupt generation logic LGE Internal Use Only Copyright © 2009 LG Electronics. Inc. All right reserved. - 48 - Only for training and service purposes...
Page 48: Audio Interface
The channels are common in the digital section. DAC 1 and DAC 2 are used together for stereo audio, with DAC 1 decoding the left-channel digital input and DAC 2 decoding the right-channel digital input. Copyright © 2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 49 -...
Page 49: Only For Training And Service Purposes
The Audio DACs are over-sampled switched-capacitor DACs. The analog filters are switched- capacitor filters followed by active-RC filters. LGE Internal Use Only Copyright © 2009 LG Electronics. Inc. All right reserved. - 50 - Only for training and service purposes...
Page 50: Only For Training And Service Purposes
Class D audio amplifier between output port and speaker. Audio amplifier Gain is set by hardware component and gain is 6 times. Figure 3-15-3 ABB Audio OUTPUT2 Copyright © 2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 51 -...
Page 51: Only For Training And Service Purposes
The other channel is typically used with an external microphone or external line input. Figure 3-15-4 Audio Input Block Diagram LGE Internal Use Only Copyright © 2009 LG Electronics. Inc. All right reserved. - 52 - Only for training and service purposes...
Page 52: Only For Training And Service Purposes
The JackSense terminal is interfaced to the switch pin of the Jack socket or a Jack Sense terminal on a handset system connector. Copyright © 2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only...
Page 53: Only For Training And Service Purposes
Associated logic then provides the AudAccInt interrupt and updates the contents of the Detector Control register as follows on each comparator transition. Figure 3-15-5 Audio Accessory Detection Block Diagram LGE Internal Use Only Copyright © 2009 LG Electronics. Inc. All right reserved. - 54 - Only for training and service purposes...
Page 54: Only For Training And Service Purposes
To avoid false interrupts the Accessory detect logic has a hardware polling loop which will prevent Interrupt generation from comparator transitions with a duration of no less than 10 mSec. Figure 3-15-6 Accessory Insertion/Removal Detector Block Diagram Copyright © 2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 55 -...
Page 55: Camera Interface(2M Fixed Focus Camera)
In all modes, data packing options optimize DMA transfer bandwidth for YUV 4:2:2 and other data formats. The PPI pins are listed in the following table. LGE Internal Use Only Copyright © 2009 LG Electronics. Inc. All right reserved. - 56 - Only for training and service purposes...
Page 56: Only For Training And Service Purposes
FIFO, interrupt request (IRQ) generation logic, clock dividers, and memory mapped registers(MMRs). The PPI provides a parallel interface to camera modules. Figure 3-16-1 PPI Block Diagram Copyright © 2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 57 -...
Page 57 A PPI FIFO (32 words deep, 16-bits wide) is provided to compensate for arbitration latency encountered by APP DMA accessing system resources. LGE Internal Use Only Copyright © 2009 LG Electronics. Inc. All right reserved. - 58 - Only for training and service purposes...
Page 58: Key Baclklight Led Interface
- Light1DutyCycle (0x2D), Light2DutyCycle (0x2E) and Light3DutyCycle (0x30). This model use only Light3 port and 2 high luminance white LED with light guard film. Copyright © 2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 59 -...
Page 59: Vibrator Interface
VIBRATOR signal of DBB with only ON/OFF function. VBAT Q400 R408 Q2_C Q2_E VIBRATOR_P Q2_B Q1_B VIBRATOR Q1_E Q1_C Figure 3-18 Vibrator Driver Block Diagram LGE Internal Use Only Copyright © 2009 LG Electronics. Inc. All right reserved. - 60 - Only for training and service purposes...
Page 60: Trouble Shooting
Figure 4-1 U601 Power Amp Module (SKY77318) U602 (AD6548) RF Main Chip (Transceiver) X601 Crystal, 26MHz Clock FL601 Copyright © 2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 61 - Only for training and service purposes...
Page 61: Rx Trouble
Crystal Circuit (2) Check Mobile SW &FEM (3) Check RX I/Q Signal Re-download SW or Do calibration again LGE Internal Use Only Copyright © 2009 LG Electronics. Inc. All right reserved. - 62 - Only for training and service purposes...
Page 62: Only For Training And Service Purposes
100p 100p CAM_I2C_CLK EB2_ADDR_12 AB21 CAM_HSYNC PPI_HSYNC AA22 CAM_VSYNC PPI_VSYNC CAM_PCLK PPI_CLK C642 WAVEFORM Graph 4-2-1(b) Graph 4-2-1(a) Copyright © 2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 63 - Only for training and service purposes...
Page 63: Only For Training And Service Purposes
C632 GSM850_RX1 0.1u DGM1110M014 FL601 ANT_SW1 ANT_SW2 ANT_SW1 ANT_SW2 C643 C644 100p 100p Graph 4-2-2 FEM Control Signal LGE Internal Use Only Copyright © 2009 LG Electronics. Inc. All right reserved. - 64 - Only for training and service purposes...
Page 64: Only For Training And Service Purposes
RX Stand alone Mode is needed refer to chapter 10 Switch Mode GSM850/900 Tx GSM1800/1900 Tx GSM850/900 Rx GSM1800/1900 Rx Table 4.2.1 Copyright © 2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 65 - Only for training and service purposes...
Page 65: Only For Training And Service Purposes
Check if there is any Similar? Replace U602 Major difference Refer to graph 4.2.3 Redownload software and calibration again LGE Internal Use Only Copyright © 2009 LG Electronics. Inc. All right reserved. - 66 - Only for training and service purposes...
Page 66: Tx Trouble
Mobile SW & FEM (3)Check PAM control signal (4)Check TX I/Q Signal Redownload SW or Do calibration again Copyright © 2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 67 - Only for training and service purposes...
Page 67: Only For Training And Service Purposes
EB2_ADDR_12 100p 100p 100p AB21 CAM_HSYNC PPI_HSYNC AA22 PPI_VSYNC CAM_VSYNC CAM_PCLK PPI_CLK C642 WAVEFORM Graph 4-3-1(b) Graph 4-3-1(a) LGE Internal Use Only Copyright © 2009 LG Electronics. Inc. All right reserved. - 68 - Only for training and service purposes...
Page 68: Only For Training And Service Purposes
GSM850_RX2 C628 C632 0.1u GSM850_RX1 DGM1110M014 FL601 ANT_SW1 ANT_SW2 C643 C644 100p 100p Graph 4-3-2 FEM Control Signal Copyright © 2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 69 - Only for training and service purposes...
Page 69: Only For Training And Service Purposes
Changing SW601 Short with RF Cable disconnected Switch Mode GSM850/900 Tx GSM1800/1900 Tx GSM850/900 Rx GSM1800/1900 Rx Table 4-3-1 LGE Internal Use Only Copyright © 2009 LG Electronics. Inc. All right reserved. - 70 - Only for training and service purposes...
Page 70: Only For Training And Service Purposes
Any Major Difference or not Any Major Difference or not ¨ ¨ Refer to Graph 4.3.3 Go to Next Step Copyright © 2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 71 - Only for training and service purposes...
Page 71: Only For Training And Service Purposes
Check if there is Replace U602 Similar? Any Major Difference ¨ Refer to Graph4.3.4 Re-download the Software And calibrate LGE Internal Use Only Copyright © 2009 LG Electronics. Inc. All right reserved. - 72 - Only for training and service purposes...
Page 72: Power On Trouble
C128 C129 C130 C131 C132 C125 TX_RAMP VBAT 2.2u KEY_ROW4 KEYOUT (2012) POWERKEY KEYON FB100 TP6 TP7 TP10 Copyright © 2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 73 - Only for training and service purposes...
Page 73: Only For Training And Service Purposes
Replace U100 and Re-download software Does it work properly? The phone will Replace the main board Properly operating. LGE Internal Use Only Copyright © 2009 LG Electronics. Inc. All right reserved. - 74 - Only for training and service purposes...
Page 74: Charging Trouble
(GPIO_059) CHG_EN PGND R214 R216 R213 R212 100K 100K R214 R216 R213 (1%) R212 C215 100K 100K (1%) Copyright © 2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 75 - Only for training and service purposes...
Page 75: Only For Training And Service Purposes
Is Voltage across U203 U203 about 1.2V? Battery is charged? Replace the main board Charging is properly operating LGE Internal Use Only Copyright © 2009 LG Electronics. Inc. All right reserved. - 76 - Only for training and service purposes...
Page 76: Vibrator Trouble
Vibrator PAD Figure 4-6 CIRCUIT VIBRATOR LCD Module VBAT Q400 R408 Q2_C Q2_E VIBRATOR_P Q2_B Q1_B VIBRATOR Q1_E Q1_C Copyright © 2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 77 - Only for training and service purposes...
Page 77: Only For Training And Service Purposes
Q400 Check the soldering Resolder or Replace vibrator of vibrator ? Replace vibrator Vibrator Working well ! LGE Internal Use Only Copyright © 2009 LG Electronics. Inc. All right reserved. - 78 - Only for training and service purposes...
Page 78: Lcd Trouble
4. TROUBLE SHOOTING 4.7 LCD Trouble TEST POINT CN500 LCD Connector CN802 U501 CN803 Figure 4-7 Copyright © 2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 79 - Only for training and service purposes...
Page 79: Only For Training And Service Purposes
LCD BACKLIGHT U501 AAT3169IFO-T1 C518 VBAT OUTCP MLED C519 MLED1 MLED2 LCD_BACKLIGHT_CTRT EN_SET MLED3 MLED4 C520 MLED5 PGND LGE Internal Use Only Copyright © 2009 LG Electronics. Inc. All right reserved. - 80 - Only for training and service purposes...
Page 80: Only For Training And Service Purposes
4. TROUBLE SHOOTING Waveform Graph 4-7-1. LCD Backlight Control Signal Waveform Graph 4-7-2. LCD Data Waveform Copyright © 2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 81 - Only for training and service purposes...
Page 81: Only For Training And Service Purposes
Replace Main FPCB Data pins on CN802 ? Does LCD work Replace LCD module properly ? LCD working well ! LGE Internal Use Only Copyright © 2009 LG Electronics. Inc. All right reserved. - 82 - Only for training and service purposes...
Page 82: Camera Trouble
4. TROUBLE SHOOTING 4.8 Camera Trouble TEST POINT CN500 Camera Connector CN701 CN702 CN801 U500 CN803 Figure 4-8 Copyright © 2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 83 - Only for training and service purposes...
Page 83: Only For Training And Service Purposes
VBAT 1V8_DVDD 2V8_IOVDD 2V8_AVDD U500 RT9011-MGPQW VOUT1 CAM_LDO_EN VOUT2 (EB2_ADDR_00) R500 C505 100K C506 C507 C523 2.2u 2.2u LGE Internal Use Only Copyright © 2009 LG Electronics. Inc. All right reserved. - 84 - Only for training and service purposes...
Page 84: Only For Training And Service Purposes
Graph 4-8-1 I2C Data Waveform Graph 4-8-2 MCLK Waveform Graph 4-8-3 CAM_VSYNC vs. Graph 4-8-4 CAM_HSYNC vs. CAM_HSYNC Waveform CAM_PCLK Waveform Copyright © 2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 85 - Only for training and service purposes...
Page 85: Only For Training And Service Purposes
EMI filter ? Does Camera work Replace U101 or Change the board properly ? Camera working well ! LGE Internal Use Only Copyright © 2009 LG Electronics. Inc. All right reserved. - 86 - Only for training and service purposes...
Page 86: Speaker Trouble
R315 CN302 FB304 SPK_P FB305 LOUD_SPK_EN R317 C319 C320 C321 C322 VA304 VA305 1000p 1000p EVLC14S02050 EVLC14S02050 100K Copyright © 2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 87 - Only for training and service purposes...
Page 87: Only For Training And Service Purposes
TP1,TP2 Check the Power voltage Change the Speaker U303 = VBAT And work properly ? Speaker Working well!! LGE Internal Use Only Copyright © 2009 LG Electronics. Inc. All right reserved. - 88 - Only for training and service purposes...
Page 88: Earphone Trouble
MIC_P C139 0.1u AIN1N MIC_N C307 C309 C310 C308 C311 JACKSENSE JACK_DETECT C142 0.1u AIN2N HP_MIC_N AIN2P HP_MIC_P Copyright © 2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 89 - Only for training and service purposes...
Page 89: Only For Training And Service Purposes
Or Change the U304 &U100 and try again the earphone? the earphone? Earphone will work properly LGE Internal Use Only Copyright © 2009 LG Electronics. Inc. All right reserved. - 90 - Only for training and service purposes...
Page 90: Receiver Trouble
CN500 AOUT2N_2 SPK_N AOUT2P_1 AOUT2P_2 SPK_P AOUT3R HP_ROUT AOUT3L C158 100p HP_LOUT C151 C152 C153 C154 C155 C156 Copyright © 2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 91 - Only for training and service purposes...
Page 91: Only For Training And Service Purposes
Change the U100 TP1 and TP2 fluctuate? Is receiver connected Resolder/Change the receiver Properly? Receiver will work properly. LGE Internal Use Only Copyright © 2009 LG Electronics. Inc. All right reserved. - 92 - Only for training and service purposes...
Page 92: Microphone Trouble
MIC200 Figure 4-12 CIRCUIT 2V5_VMIC C326 C327 R324 MIC_P 100ohm C328 R326 MIC_N 100ohm MIC300 OBG-415L42-C33LH VA306 VA307 Copyright © 2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 93 - Only for training and service purposes...
Page 93: Only For Training And Service Purposes
Is it a few tens mV AC? Check the soldering of Resolder component R323, R325 & C139 Microphone will work properly. LGE Internal Use Only Copyright © 2009 LG Electronics. Inc. All right reserved. - 94 - Only for training and service purposes...
Page 94: Sim Card Interface Trouble
2V85_VSIM (5000-6T-1.8SL) R316 J300 (GPIO_100) SIM_RST SIM_DATA SIM_CLK GND4 GND1 C323 C318 C324 GND3 GND2 C325 1000p 220n Copyright © 2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 95 - Only for training and service purposes...
Page 95: Only For Training And Service Purposes
Does it work Does it work Properly? Properly? SIM card is properly working SIM card is properly working. LGE Internal Use Only Copyright © 2009 LG Electronics. Inc. All right reserved. - 96 - Only for training and service purposes...
Page 96: Key Backlight Trouble
4. TROUBLE SHOOTING 4.14 KEY backlight Trouble TEST POINT LD400 LD401 BOTTOM Figure 4-14 Copyright © 2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 97 - Only for training and service purposes...
Page 97 Are all LEDs Check the soldering Working? each R and LED Replace or resolder Backlight will work properly. component LGE Internal Use Only Copyright © 2009 LG Electronics. Inc. All right reserved. - 98 - Only for training and service purposes...
Page 98: Rtc Trouble
X100 CAM_DATA7 PPI_DATA_9 OSCIN FC-135 OSCOUT 32.768KHz R104 C141 BT_UART_TX GPIO_000 BT_UART_RX GPIO_001 GPIO_002 BT_UART_CTS GPIO_003 BT_UART_RTS GPIO_004 Copyright © 2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 99 - Only for training and service purposes...
Page 99 TP1 about 400mV? change the X100 Re-download software and try Is RTC properly working? again RTC will work properly LGE Internal Use Only Copyright © 2009 LG Electronics. Inc. All right reserved. - 100 - Only for training and service purposes...
Page 100: Folder On/Off Trouble
4. TROUBLE SHOOTING 4.16 Folder on/off Trouble TEST POINT U400 Figure 4-16 CIRCUIT 2V93_VEXT R407 FOLDER_DET U400 C402 Copyright © 2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 101 - Only for training and service purposes...
Page 101 Voltage at TP2 =2.93V Close folder. Replace U400 Voltage at TP2 = 0V Folder on/off will work properly LGE Internal Use Only Copyright © 2009 LG Electronics. Inc. All right reserved. - 102 - Only for training and service purposes...
Page 102: Micro Sd Trouble
DAT2 DAT1 MC_D1 MC_D3 DAT3 DAT0 MC_D0 MC_CMD MC_CLK R325 GND1 GND3 MC_DET GND2 GND4 R328 C329 2.2u Copyright © 2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 103 - Only for training and service purposes...
Page 103 Check out MC_CLK & Data Re-download SW Timing OK? Replace Micro SD Card Micro SD Card will work properly LGE Internal Use Only Copyright © 2009 LG Electronics. Inc. All right reserved. - 104 - Only for training and service purposes...
Page 104: Bluetooth Trouble
VBATT BT_MAIN_CLK_EN TRI_OPEN GPIO6 REGBT R218 GPIO7 VREG_CTL BT_LDO_EN (EB2_ADDR_04) 19.2MHz 100K C211 C216 C218 C210 C217 C212 Copyright © 2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 105 - Only for training and service purposes...
Page 105 BT_Reset check at TP5? U101 Bluetooth on is OK? Re-download SW and try again Bluetooth will work properly LGE Internal Use Only Copyright © 2009 LG Electronics. Inc. All right reserved. - 106 - Only for training and service purposes...
Page 106: Fm Radio Trouble
VBATT BT_MAIN_CLK_EN GPIO6 REGBT TRI_OPEN R218 19.2MHz GPIO7 VREG_CTL BT_LDO_EN (EB2_ADDR_04) 100K C211 C216 C218 C210 C217 C212 Copyright © 2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 107 - Only for training and service purposes...
Page 107 Vbat at TP4 Replace Check BT_32k? TP5 U101 Replace FM_Radio work is good? U201 FM_radio will work properly LGE Internal Use Only Copyright © 2009 LG Electronics. Inc. All right reserved. - 108 - Only for training and service purposes...
Page 108: Download
5. DOWNLOAD 5. DOWNLOAD 5.1 Download A. Download Setup Figure 5-1 describes Download setupp Figure 5-1 Download Setup Copyright © 2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 109 - Only for training and service purposes...
Page 109 5. DOWNLOAD B. Multi Download Procedure 1. Run GSM Multi Download program and select Setting LGE Internal Use Only Copyright © 2009 LG Electronics. Inc. All right reserved. - 110 - Only for training and service purposes...
Page 110 DLL file and press Open OPEN Location KF305 KF300_DLL KF300.dll File Name OPEN File Type CANCLE Copyright © 2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 111 - Only for training and service purposes...
Page 111 6. Repeat step 4-5 to select CodeData.mot KF305 Model KF300 KF300.dll OPEN Location File Name OPEN File Type CANCLE LGE Internal Use Only Copyright © 2009 LG Electronics. Inc. All right reserved. - 112 - Only for training and service purposes...
Page 112 8. Press OK to end Configuration Model KF300 KF305 KF305 KF300.dll KF300 KF305 KF305 Model KF300 KF300 Model KF300 KF305 KF305 Select Rate Copyright © 2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 113 - Only for training and service purposes...
Page 113 Then you need to conncect the mobile phone with I/O Cable to get downloaded. 10. Once downloading is started, press STOP button to keep from re-downloading after downloading is completed. LGE Internal Use Only Copyright © 2009 LG Electronics. Inc. All right reserved. - 114 - Only for training and service purposes...
Page 116: Circuit Diagram
R109 USC_4 USC4 AA10 JTAGEN USC_5 USC5 R112 TESTMODE USC_6 USC6 JTAGEN (CHANG TO 1K USING TRACE 32) - 117 - Copyright © 2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 117 USC0 (GPIO_037) USB_DET USBON (GPIO_059) CHG_EN PGND OUT1 R217 R214 R216 R213 R212 C215 100K 100K (1%) - 118 - Copyright © 2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 118 C328 MC_CLK R325 GND1 GND3 R326 MC_DET GND2 GND4 MIC_N R328 C329 100ohm MIC300 OBG-415L42-C33LH 2.2u VA306 VA307 - 119 - Copyright © 2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 119 KEY_ROW1 Q1_B VIBRATOR Q1_E Q1_C VBAT KEY_ROW2 KB422 KEY_ROW3 POWERKEY KEY_ROW4 KEY_ROW5 FLIP 2V93_VEXT R407 FOLDER_DET U400 C402 - 120 - Copyright © 2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 120 MLED2 INOUT_A2 INOUT_B2 LCD_RS INOUT_A1 INOUT_B1 LCD_BACKLIGHT_CTRT EN_SET MLED3 MLED4 FL508 ICVE10184E150R101FR C520 MLED5 MLED3 PGND MLED4 MLED5 - 121 - Copyright © 2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 121 C643 C644 100p 100p ANT_SW1 ANT_SW2 GSM RX EGSM RX DCS RX PCS RX GSM/EGSM TX DCS/PCS TX - 122 - Copyright © 2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 122 Match Two Column Lines to Outer Circle of Buttons HOT 1 HOT 2 HOT 3 HOT 4 KEY_COL3 KEY_COL4 KEY_ROW4 KEY_ROW5 - 123 - Copyright © 2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 123 LCD_WR (0.15mm) MLED2 (0.15mm) (0.15mm) MLED3 MLED1 (0.15mm) MLED4 LCD_DATA00 (0.15mm) MLED5 LCD_DATA01 VISION MARK TP801 TP802 TP803TP804 - 124 - Copyright © 2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 124 7. CIRCUIT DIAGRAM SUB KEY MATRIX SIDEKEY_PAD CN501 VOLUME_UP VOLUME_DOWN - 125 - Copyright © 2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 126: Bga Ic Pin Check
8. BGA IC Pin Check 8. BGA IC Pin Check NOT IN USE Copyright © 2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 127 - Only for training and service purposes...
Page 127 8. BGA IC Pin Check AD6855 Terminal Locations (Top view) NOT IN USE LGE Internal Use Only Copyright © 2009 LG Electronics. Inc. All right reserved. - 128 - Only for training and service purposes...
Page 133 U201 - The Bluetooth working bad - The FM Radio working bad Q400 - The vibrator working bad - 134 - Copyright © 2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 134 9. PCB LAYOUT KF305 CN701 CN702 Key_PCB conn. 2M CAM conn. NO Camera NO Camera No Hot_Key KF305 - 135 - Copyright © 2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 135 9. PCB LAYOUT CN801 CN802 Key_PCB Conn. LCD_Conn. No Camera No Display No Hot_Key KF305 - 136 - Copyright © 2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 138: Engineering Mode
Backlight Buzzer Bluetooth on Buzzer Vibrator Bluetooth off Vibrator Key PAD Battery MicSpkTest Audio Camera Video Camera Bluetooth Copyright © 2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 139 - Only for training and service purposes...
Page 139: Bb Test [Menu 1]
This menu is to test the vibration mode. 1) Vibrator on : Vibration mode is on. 2) Vibrator off : Vibration mode is off. LGE Internal Use Only Copyright © 2009 LG Electronics. Inc. All right reserved. - 140 - Only for training and service purposes...
Page 140 2) DAI UPLINK : Speech encoder test 3) DAI DOWNLINK : Speech decoder test 4) DAI OFF : DAI mode off Copyright © 2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 141 - Only for training and service purposes...
Page 141: Rf Test [Menu 2]
[Soft2 Key]. If the key is working properly, name of the key is displayed on the screen. Test will be completed in 15 seconds automatically. LGE Internal Use Only Copyright © 2009 LG Electronics. Inc. All right reserved. - 142 - Only for training and service purposes...
Page 142: Trace Option [Menu 4]
RF Calibration data, etc. cannot be restored again. 10.7 S/W version This displays software version stored in the phone. Copyright © 2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 143 - Only for training and service purposes...
Page 143: Stand Alone Test
- See if the value of RSSI is close to -16dBm when setting the value between 0 ~ 26 in Gain Control Index. - Normal phone should indicate the value of RSSI close to -16dBm. LGE Internal Use Only Copyright © 2009 LG Electronics. Inc. All right reserved. - 144 - Only for training and service purposes...
Page 144: Means Of Test
After setting them all above, press connect button. e. Press the start button Connect Button Figure 11-1. HW test program Copyright © 2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 145 - Only for training and service purposes...
Page 145 11. STAND ALONE TEST Figure 11-2. HW test setting Figure 11-3. Ramping profile LGE Internal Use Only Copyright © 2009 LG Electronics. Inc. All right reserved. - 146 - Only for training and service purposes...
Page 146: Auto Calibration
PC (for Software Installation) Pentium II class above 300MHz Table 12-2-1. Calibration Equipment List. Figure 12-2-2. Equipment Setup Copyright © 2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 147 - Only for training and service purposes...
Page 147: Test Jig Operation
Indicate data transfer state through the UART port LED 4 Indicate data transfer state through the MON port Table 12-3-3 LED Description LGE Internal Use Only Copyright © 2009 LG Electronics. Inc. All right reserved. - 148 - Only for training and service purposes...
Page 148: Procedure
10. Select “LOGIC MODE” that you want Logic mode: 1-> Calibration only 2-> Auto test only 3-> Cal & Auto Copyright © 2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 149 - Only for training and service purposes...
Page 149 12. AUTO CALIBRATION 11. Select the model name “KF305d/KF305/KF305c” Model name Start button 12. Click “start” button LGE Internal Use Only Copyright © 2009 LG Electronics. Inc. All right reserved. - 150 - Only for training and service purposes...
Page 150: Agc
12.7 ADC This procedure is for battery calibration. You can get main Battery Config Table and temperature Config Table will be reset. Copyright © 2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 151 - Only for training and service purposes...
Page 152: Exploded View & Replacement Part List
13. EXPLODED VIEW & REPLACEMENT PART LIST 13.1 EXPLODED VIEW - 153 - Copyright © 2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 154: Replacement Parts
COMPLEX, (empty), , , , , Without Color MTAZ00 TAPE MTAZ0198001 COMPLEX, (empty), , , , , Without Color Copyright © 2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 155 - Only for training and service purposes...
Page 155 COMPLEX, (empty), , , , , Without Color MPBN00 PAD,SPEAKER MPBN0048501 COMPLEX, (empty), , , , , Without Color LGE Internal Use Only Copyright © 2009 LG Electronics. Inc. All right reserved. - 156 - Only for training and service purposes...
Page 156: Main Component
COMPLEX, (empty), , , , , Silver 3.0 ,-2.0 dBd,, ,internal, GSM850/1800/1900 ,; ,TRIPLE ,- SNGF00 ANTENNA,GSM,FIXED SNGF0031101 2.0 ,50 ,3.0 Copyright © 2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 157 - Only for training and service purposes...
Page 157 ECZH0003103 0.1 uF,10V ,K ,X7R ,HD ,1005 ,R/TP C117 CAP,CERAMIC,CHIP ECCH0004904 1 uF,6.3V ,K ,X5R ,TC ,1005 ,R/TP LGE Internal Use Only Copyright © 2009 LG Electronics. Inc. All right reserved. - 158 - Only for training and service purposes...
Page 158 ECCH0000120 39 pF,50V,J,NP0,TC,1005,R/TP C152 CAP,CERAMIC,CHIP ECCH0000120 39 pF,50V,J,NP0,TC,1005,R/TP C153 CAP,CERAMIC,CHIP ECCH0000120 39 pF,50V,J,NP0,TC,1005,R/TP C154 CAP,CERAMIC,CHIP ECCH0000120 39 pF,50V,J,NP0,TC,1005,R/TP Copyright © 2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 159 - Only for training and service purposes...
Page 159 10 uF,6.3V ,M ,X5R ,TC ,1608 ,R/TP C321 CAP,CERAMIC,CHIP ECCH0000143 1 nF,50V,K,X7R,HD,1005,R/TP C322 CAP,CERAMIC,CHIP ECCH0000143 1 nF,50V,K,X7R,HD,1005,R/TP C324 CAP,CERAMIC,CHIP ECCH0000115 22 pF,50V,J,NP0,TC,1005,R/TP LGE Internal Use Only Copyright © 2009 LG Electronics. Inc. All right reserved. - 160 - Only for training and service purposes...
Page 160 ECCH0000117 27 pF,50V,J,NP0,TC,1005,R/TP C614 CAP,CERAMIC,CHIP ECCH0000117 27 pF,50V,J,NP0,TC,1005,R/TP C616 CAP,CERAMIC,CHIP ECCH0000175 2.7 pF,50V ,B ,NP0 ,TC ,1005 ,R/TP Copyright © 2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 161 - Only for training and service purposes...
Page 161 VMN2 ,5 V,10 W,R/TP ,1.0*0.6*0.4 ,; , ,7.82V , , ,100mW D502 DIODE,TVS EDTY0009401 ,[empty] ,[empty] ,2P ,1 LGE Internal Use Only Copyright © 2009 LG Electronics. Inc. All right reserved. - 162 - Only for training and service purposes...
Page 162 INDUCTOR,CHIP ELCH0001052 18 nH,J ,1005 ,R/TP ,PBFREE TES6 ,200 mW,R/TP ,NPN/PNP dual, Vo1=50V, Q400 TR,BJT,ARRAY EQBA0004902 Io1=100mA, Vo2=-50V,Io2=-100mA Copyright © 2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 163 - Only for training and service purposes...
Page 163 1 ohm,1/16W ,J ,1005 ,R/TP R314 RES,CHIP,MAKER ERHZ0000486 47 Kohm,1/16W ,J ,1005 ,R/TP R315 RES,CHIP,MAKER ERHZ0000486 47 Kohm,1/16W ,J ,1005 ,R/TP LGE Internal Use Only Copyright © 2009 LG Electronics. Inc. All right reserved. - 164 - Only for training and service purposes...
Page 164 BGA ,291 PIN,R/TP ,EGPRS Digital Base band, LEMANS U201 MODULE,ETC SMZY0015001 6.3 * 5.3 * 1.3mm , 63 PIN, Bluetooth Module(BT+FM) Copyright © 2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 165 - Only for training and service purposes...
Page 165 VMN2 ,5 V,10 W,R/TP ,1.0*0.6*0.4 ,; , ,7.82V , , ,100mW ZD300 DIODE,TVS EDTY0009401 ,[empty] ,[empty] ,2P ,1 LGE Internal Use Only Copyright © 2009 LG Electronics. Inc. All right reserved. - 166 - Only for training and service purposes...
Page 166 QFN ,4 PIN,R/TP ,1.8X1.2X0.5 size wide input voltage U400 EUSY0313401 Hall Switch VA405 VARISTOR SEVY0004101 5.6 V, ,SMD ,360pF, 1005 SMZY00 MODULE,ETC SMZY0014202 256MB MicroSD Copyright © 2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 167 - Only for training and service purposes...
Page 167: Accessory
100-240V ,5060 Hz,5.1 V,.7 A,NOM ,AC-DC ADAPTOR ,; ADAPTOR,AC-DC SSAD0024602 ,85Vac~264Vac ,5.1V (+0.15V, -0.2V) ,700mA ,5060 , ,WALL 2P ,I/O CONNECTOR , LGE Internal Use Only Copyright © 2009 LG Electronics. Inc. All right reserved. - 168 - Only for training and service purposes...
Page 168 Note...
Page 169 Note...

LG KF305 Service Manual

1 Introduction

2 System Specification

3 Technical Brief

4 Trouble Shooting

5 Download

6 Block Diagram

7 Circuit Diagram

8 BGA IC Pin Check

9 Pcb Layout

10 Engineering Mode

11 Stand Alone Test

12 Auto Calibration

13 Exploded View & Replacement Part List

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