Page 1 Internal Use Only Service Manual KC550 Date: May, 2008 / Issue 1.0...
Page 2 LGE Inc. Furthermore, LGE Inc. reserves the right, without notice, to make changes to equipment design as advances in engineering and manufacturing methods warrant. * This manual provides the information necessary to install, program, operate and maintain the KC550. Copyright © 2008 LG Electronics. Inc. All right reserved.
Page 4: Table Of Contents
14.1 Exploded View ........157 5. PCB layout........79 14.2 Replacement Parts ......159 14.3 Accessory ..........182 5.1 Main PCB component placement ..79 Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 5 - Only for training and service purposes...
Page 6: 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 KC550 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 7: Only For Training And Service Purposes
1. INTRODUCTION E. Notice of Radiated Emissions The KC550 complies with rules regarding radiation and radio frequency emission as defined by local regulatory agencies. In accordance with these agencies, you may be required to provide information such as the following to the end user.
Page 8: Abbreviation
Global System for Mobile Communications IPUI International Portable User Identity Intermediate Frequency Liquid Crystal Display Low Drop Output Light Emitting Diode Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 9 - Only for training and service purposes...
Page 9: Only For Training And Service Purposes
Voltage Controlled Oscillator VCTCXO Voltage Control Temperature Compensated Crystal Oscillator Wireless Application Protocol 8PSK 8 Phase Shift Keying LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. - 10 - Only for training and service purposes...
Page 10: General 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. LGE Internal Use Only - 11 - Only for training and service purposes...
Page 11: 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 © 2008 LG Electronics. Inc. All right reserved. - 12 - Only for training and service purposes...
Page 12: Only For Training And Service Purposes
3,000 ~ 6,000 6,000 Output RF Spectrum EGSM (due to switching transient) Offset from Carrier (kHz) Max. (dBm) 1,200 1,800 Copyright © 2008 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
* 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 © 2008 LG Electronics. Inc. All right reserved. - 14 - Only for training and service purposes...
Page 14: Only For Training And Service Purposes
4 → 2 -103dBm ~ -101dBm 2 → 1 -105dBm ~ -104dBm 1 → 0 < -106 dBm Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 15 - Only for training and service purposes...
Page 15: Only For Training And Service Purposes
Battery full charge voltage = 4.2 V Capacity: 900mAh Travel Charger Switching-mode charger Input: 100 ~ 240 V, 50/60Hz Out put: 5.1, 0.7A LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. - 16 - Only for training and service purposes...
Page 16: Only For Training And Service Purposes
Offset from carrier(kHz) Max. dBc +0.5 600 ~ <1,200 1,200 ~ <1,800 1,800 ~ <3,000 3,000 ~ <6,000 6,000 Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 17 - Only for training and service purposes...
Page 17: Only For Training And Service Purposes
(due to switching transient) Offset from carrier(kHz) Max. dBm 1,200 1,800 --30 DCS1800, PCS1900 Offset from carrier(kHz) Max. dBm 1,200 1,800 LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. - 18 - Only for training and service purposes...
Page 18: Technical Brief
3. TECHNICAL BRIEF 3. TECHNICAL BRIEF 3.1 KC550 Component Block diagram KC550 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 19: Main Chip Introduction
S-GOLDradioTM is tailored to fit the requirements of EDGE-enabled feature phones with a standard set of multimedia applications such as: LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. - 20 - Only for training and service purposes...
Page 20: Only For Training And Service Purposes
Figure 2 shows a typical application example: The S-GOLDradioTM as a single chip solution acting as a multifunctional engine in a complete mobile phone platform. Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 21 -...
Page 21: Baseband Part Introduction
• RS-232 over a 16C550 compliant UART • MMC/SD Memory Card Interface - Low Voltage Capable - SDIO expandable (using external components) LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. - 22 - Only for training and service purposes...
Page 22: Only For Training And Service Purposes
The output of audio and voice codecs can be mixed and routed to the integrated Hi-Fi Stereo voiceband supporting CD-Quality. Alternatively, the audio can also be sinked to a mono loudspeaker using the integrated hands-free amplifier. Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 23 -...
Page 23: Only For Training And Service Purposes
The audio recording is performed on the DSP (GSM AMR CODEC). Multiplexing of audio and video streams is performed by the ARM. LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. - 24 - Only for training and service purposes...
Page 24: Only For Training And Service Purposes
IC, which contains functions (in HW and/or SW) to process still images and video data. This configuration is intended for higher-end graphics features (for example, high quality video streaming, video conferencing, hardware-assisted 2D/3D graphics functions, etc.). Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 25 -...
Page 25: Only For Training And Service Purposes
TX RF band select PAMODE PA_MODE PAM Mode select FEM control FEM control PAEN PA_EN PAM Power on VRAMP TX_RAMP LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. - 26 - Only for training and service purposes...
Page 26: Only For Training And Service Purposes
3. TECHNICAL BRIEF 3.3.4 USART Interface KC550 have a UART Driver as follow : - USART1 : Hardware Flow Control / SW upgrade / Calibration Table 3. USIF Interface Spec. USART_0(USART1) Resource Name Remark USART0_TXD UART_TX Transmit Data USART0_RXD UART_RX...
Page 27: Only For Training And Service Purposes
3. TECHNICAL BRIEF 3.3.6 GPIO map Over a hundred allowable resources, KC550 is using as follows except dedicated to SIM and Memory. KC550 GPIO(General Purpose Input/Output) Map, describing application, I/O state, and enable level, is shown in below table. Table 5 S-GOLDradio GPIO pin Map...
Page 28: Only For Training And Service Purposes
MM_A16 DIF_WR MM_WR 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 Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 29 - Only for training and service purposes...
Page 29: Only For Training And Service Purposes
SND_L EP_P SND_R HS_N EAR_N EP_CM HS_P EAR_P MIC1_N MIC_N MIC1_P MIC_P MIC2_N HS_MIC_N MIC2_P HS_MIC_P VMIC VMIC LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. - 30 - Only for training and service purposes...
Page 30: Only For Training And Service Purposes
FCDP_RBN FCDP #GSM TDMA Timer: GSM Control T_OUT1 NONE T_OUT2 NONE T_OUT3 UART_BT_RTS T_OUT4 UART_BT_CTS T_OUT5 FLIP_OPEN T_OUT6 PA_MODE_2 Copyright © 2008 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
VDDP_MMC NONE VDD_RTC NONE VSS_RTC NONE VDD_PLL NONE VDD_USB NONE #Analog Power Supply VAUDIO VAUDIO_2V5 VSS_MS VSS_EP AGND_MS1~2 LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. - 32 - Only for training and service purposes...
Page 32: Only For Training And Service Purposes
#Reference Oszillator / PLL REFR 26MHz 26MHz #Power Supply VDDTX VRF3_2V85 VDDVCO VRF3_2V85 VDDTRX VRF2_1V5 VDDDIG VRF3_2V85 VDDMS VRF3_2V85 Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 33 - Only for training and service purposes...
Page 33: Only For Training And Service Purposes
VSS_AUDIO VLED VAUX VAUX_2V9 VVIB VVIB_2V8 VBAT_LDO1 VBAT VSS_LDO1 VMMC VMMC VUSB VUSB_3V1 VBAT_BSW_USB_MMC VBAT VIO_2V82 VIOb NONE LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. - 34 - Only for training and service purposes...
Page 34: Only For Training And Service Purposes
NONE #Reference IREF1 A_GND VREF1 #LED's BL1_PWM / VSENSE1 BL2_PWM BL3_PWM FLASH_ON NONE TXONPA NONE VSS_FLASH FLASH_SINK KEY_BL Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 35 - Only for training and service purposes...
Page 35: Only For Training And Service Purposes
ON_OFF / SCAN_RESET PWRON ON_OFF2 / SCAN_CLK NONE VSS_DIG NONE ON_OFF_OUT NONE RESET2_N / VSENSE2 PO_RESET_N / SCAN_OUT2 PO_RESET LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. - 36 - Only for training and service purposes...
Page 36: Only For Training And Service Purposes
NONE I2C_DAT NONE #Audio Loudspeaker Amplifier VBAT_MONO NA VSS_MONO NA MONO_OUTP NA MONO_OUTN NA MONO_INP NA MONO_INN NA Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 37 - Only for training and service purposes...
Page 37: Power Management Unit
It also provides stand-by voltages and supports different low power modes. See Figure 4. Figure 4 S-GOLDradioTM PMU Block Diagram LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. - 38 - Only for training and service purposes...
Page 38: Only For Training And Service Purposes
• Current Sink Support for photo flash LED driver • Support for serial connected LEDs • Support for Trickle and Indicator LED Copyright © 2008 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
• PMU is configured in software via registers • Power-on reset generation • Interrupt (event) line to indicate status change. LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. - 40 - Only for training and service purposes...
Page 40: Only For Training And Service Purposes
VSD2_1V8 VSD1_1V5 C129 C130 0.1u C131 0.1u 0.1u VBAT BAT_ID RF_TEMP REMOTE_ADC Figure 5 S-GOLDradio PMU circuit diagram Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 41 - Only for training and service purposes...
Page 41: Only For Training And Service Purposes
-20°C ~ 60°C: standard charging (up to 4.2 V) c. 60°C ~ : low charging voltage operation (3.8V ~ 4.0V) LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. - 42 - Only for training and service purposes...
Page 42: 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 Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 43 - Only for training and service purposes...
Page 43 3. TECHNICAL BRIEF Figure 7 Power Up and Down Sequence triggered by ON_OFF1 LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. - 44 - Only for training and service purposes...
Page 44: Only For Training And Service Purposes
3. TECHNICAL BRIEF Figure 8 Power supply start up Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 45 - Only for training and service purposes...
Page 45: Only For Training And Service Purposes
RPWRON_EN 330K R410 RPWRON C406 3.3M 2.2u END_KEY_IN Figure 10 Remote power on and End-key power on circuit LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. - 46 - Only for training and service purposes...
Page 46: Sim Interface
3. TECHNICAL BRIEF 3.6 SIM interface KC550 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 48: Only For Training And Service Purposes
ADD(17) R119 VSS5 FCDP R__B VSS6 TP124 VSS7 Figure 12 NAND Flash memory & SDRAM MCP circuit diagram Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 49 - Only for training and service purposes...
Page 49: Lcd Display
Data[7] for LCD Data[6] for LCD Data[5] for LCD Data[4] for LCD Data[3] for LCD Data[2] for LCD LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. - 50 - Only for training and service purposes...
Page 50: Only For Training And Service Purposes
LED Cathode MLED4 LED Cathode MLED3 LED Cathode MLED2 LED Cathode MLED1 LED Cathode MLED LED Anode Ground Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 51 - Only for training and service purposes...
Page 51: Only For Training And Service Purposes
VA104 EVLC14S02050 EVLC14S02050 EVLC14S02050 VA102 VA101 C102 C101 0.1u VA106 VA105 VA103 EVLC14S02050 Figure 13 37pin LCD connector circuit LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. - 52 - Only for training and service purposes...
Page 52: Keypad Switching & Scanning
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. Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only...
Page 53: Keypad Back-Light Illumination
Figure 16 Key PCB Back-light LEDs KEY BACKLIGHT VBAT LEWWS44-E LD101 KEY_BL R102 R103 LEWWS44-E LD102 Figure 17 Key FPCB Back-light LEDs LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. - 54 - Only for training and service purposes...
Page 54: Lcd Back-Light Illumination
2.2u Figure 18 LCD Back light unit and Key backlight charge pump IC Table 8 Charge pump IC LCD part current setting table Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 55 - Only for training and service purposes...
Page 56: Jtag Interface Connector
TRIG_IN Figure 19 JTAG interface connector In case of KC550 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) Copyright ©...
Page 57: Audio
3. TECHNICAL BRIEF 3.13 Audio KC550 Audio signal flow diagram as following diagram. Analog SWICH HSO_L HSO_L HEADSET 100nH HSO_R SND_N HSO_R 100nH SND_R 100uF AMPIN_L LIN2 LOUT 100uF AMPIN_R RIN2 ROUT HS_SEL decoding FM_SND_L LIN1 BT/CSR FM_SND_R RIN1 encoding...
Page 58: Only For Training And Service Purposes
SPK_N R222 CSB_ADDR FB206 100K C240 C241 I2C_SCL SCLK I2C_SDA SDIN MODE Figure 21 Audio amplifier Sub-system IC Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 59 - Only for training and service purposes...
Page 59: Only For Training And Service Purposes
C104 MIC101 0.1u 100p C103 C105 MIC_N 0.1u SPM0204HE5-PB-3 C107 VA111 C108 EVLC14S02050 C109 Figure 23 Microphone circuit LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. - 60 - Only for training and service purposes...
Page 60: Only For Training And Service Purposes
3. TECHNICAL BRIEF Figure 24 S-GOLDradioTM Audio Front End Block Diagram Figure 25 S-GOLDradioTM Audio Front End Circuit Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 61 - Only for training and service purposes...
Page 61: Usb Charging Circuit
CHG_EOC _CHG IVDC CHG_EN IMIN IUSB R420 C413 C414 5.1K R421 R419 C415 Figure 26 USB charging circuit LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. - 62 - Only for training and service purposes...
Page 62: Bluetooth
C551 C553 C550 2.2u 2.2u 0.01u BT_RESET C554 0.1u VIO_2V62 Figure 27. Bluetooth / FM Radio Circuit Diagram Copyright © 2008 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
• I2C slave for FM • Two audio PCM interfaces (input and output) • Analogue stereo (output only) LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. - 64 - Only for training and service purposes...
Page 64: Only For Training And Service Purposes
2 .4 GH Antenn IN / OU Radi I2S(PCM Processo VBT_2V Figure 28. Bluetooth / FM Radio Block Diagram Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 65 - Only for training and service purposes...
Page 65: 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 Copyright © 2008 LG Electronics. Inc. All right reserved. - 66 - Only for training and service purposes...
Page 66: 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. LGE Internal Use Only - 67 - Only for training and service purposes...
Page 67: Only For Training And Service Purposes
MMC_D(3) MMC_D(2) R411 MMC_DETECT VIO_2V62 C407 R412 C408 1000p Figure 30 Micro SD socket circuit with power control LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. - 68 - Only for training and service purposes...
Page 68: 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. LGE Internal Use Only - 69 - Only for training and service purposes...
Page 69: Only For Training And Service Purposes
USB_DM HSD2- C318 HSO_L L305 C319 HSO_R L306 C320 C321 680p 680p Figure 31 MMI 18pin connector circuit LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. - 70 - Only for training and service purposes...
Page 70: Rf Circuit Technical Brief
GSM and EDGE with integrated PGA functionality. Figure 32. PMB 6272 Function Block Diagram Copyright © 2008 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
PABS DCS1800_RXP VDET PA_MODE PAMODE DCS1800_RXN RX3X PA_EN PAEN PCS1900_RXP TX_RAMP VRAMP PCS1900_RXN RX4X Figure 33 TX IQ LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. - 72 - Only for training and service purposes...
Page 72: Receiver Part
Furthermore an automatic DC-offset compensation can be used (depending on the gain setting) to reduce the DC-offset at baseband-output. A programmable gain correction can be applied to correct for front end- and receiver gain tolerances. Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 73 -...
Page 73: 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. LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. - 74 - Only for training and service purposes...
Page 74: Rf Synthesizer
To cover the wide frequency range the VCO is automatically aligned by a binary automatic band selection (BABS) before each synthesizer startup. Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 75 -...
Page 75: Dcxo
3.3p L504 L503 L502 L505 15nH 5.1nH 18nH 3.9nH GSM900 GSM850 DCS1800 PCS1900 Figure 36. FEM Circuit Diagram LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. - 76 - Only for training and service purposes...
Page 76: Power Amplifier Module
REVD2 Reserved 13~15 Ground DCS/PCS_OUT RF Output(DCS/PCS) DC BlockedD GND PAD GRID Ground pad grid is device underside. Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 77 - Only for training and service purposes...
Page 77: Mode Selection
GMSK modulation and provides bias optimization for EDGE modulation depending on the state of MODE control. LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. - 78 - Only for training and service purposes...
Page 78: Pcb Layout
5. PCB layout 5.1 Main PCB component placement MOTOR Charging Baseband MMIC MEMORY Accel Sensor Main PCB Top Copyright © 2008 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
SIM/Mi cr oSD Audio Ant enna Bluetooth Am p Hal l Batte r y Connector Main PCB bottom LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. - 80 - Only for training and service purposes...
Page 80: Only For Training And Service Purposes
LCD connecto r Pump Char ge Pump KEY PCB Bottom Do m e Do m e KEY PCB TOP Copyright © 2008 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
5. PCB layout Hall Volume Numeric Camera F-KEY TOP LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. - 82 - Only for training and service purposes...
Page 82: Only For Training And Service Purposes
5. PCB layout Backup battery F-LCD TOP Receiver F-LCD Bottom Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 83 - Only for training and service purposes...
Page 83: Trouble Shooting
- Connect mobile switch cable between Communication test set and DUT when you need to make a phone call. - Follow trouble shooting procedure LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. - 84 - Only for training and service purposes...
Page 84: Power On Trouble
Remote Power On PWRON R408 RPWRON_EN 330K R410 RPWRON C406 3.3M 2.2u END_KEY_IN END_KEY_IN KP_IN(6) R312 END_KEY KP_OUT(0) Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 85 - Only for training and service purposes...
Page 85 Is it correct? Is the 26MHz clock from Check solder X101 of U104 ? Replace X-TAL Replace main PCB X101 LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. - 86 - Only for training and service purposes...
Page 87: Charging Trouble
15 : VUSB 16 : D/ TX 17 : D/ RX FL305 FL306 FL307 EVSC5S04F050 EVSC5S04F050 EVSC5S04F050 L304 C315 100nH LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. - 88 - Only for training and service purposes...
Page 88 R104 charging until Battery voltage battery Voltage goes up to is over 3.35V? 3.35V Charge is operating properly Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 89 - Only for training and service purposes...
Page 89: Lcd Display Trouble
L302 FL301 Check Check Data ta signal via FL30 301~FL304 1~FL304 connect connect ion on of f F-LCD LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. - 90 - Only for training and service purposes...
Page 90 Check in insula lators rs Check co co nnection tion of of F- LCD connec connec tor tors Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 91 - Only for training and service purposes...
Page 91 CN301 On CN301 Signals are normal in DIF_CD(TP1),CS(TP2) Check solder and ,WR(TP3), repair FL303 On CN301 Assemble LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. - 92 - Only for training and service purposes...
Page 92: Camera Trouble
1V8_VMM C276 R233 4.7K EVLC18S02003 EVLC18S02003 EVLC18S02003 EVLC18S02003 C278 C279 C280 TP3 TP4 ICVL0518100Y500FR Check the connector combination Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 93 - Only for training and service purposes...
Page 93 Camera module Main PCB Working properly? Check Signals & Replace U206 and Power line U101 (Key PCB) TP1~TP8 Assemble LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. - 94 - Only for training and service purposes...
Page 94: Receiver & Speaker Trouble
CN201 SPK_N C243 C244 RECEIVER L101 EAR_N EAR_N 100nH C101 EAR_P L102 EAR_P 100nH C102 C103 ICVL0505101V150FR ICVL0505101V150FR Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 95 - Only for training and service purposes...
Page 95 Input Signal (C230,C239) Receiver Signal Replace Receiver High(1.6V)? Receiver Signal (C102, C103) Replace Main PCB Assemble TP3 3 LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. - 96 - Only for training and service purposes...
Page 96: Microphone Trouble
(MIC101) MIC Signal MIC Bias side of MIC400. (C107, C108) (L101) Replace Main PCB Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 97 - Only for training and service purposes...
Page 97: Ear-Mic Jack Detection Trouble
Is the status of FL307 Resolder FL307 low? The main board has a problem Replace Main PCB Assemble CN302 Ear-Jack Signal FL307 LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. - 98 - Only for training and service purposes...
Page 98: Vibrator Trouble
Check the voltage difference of TP1 &TP2 Replace U402 is 3V? Replace Vibrator Assemble Check so solder ldering U402 Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 99 - Only for training and service purposes...
Page 99: Keypad Back Light Trouble
LED5 MLED5 LD102 LEDFL SUB_KEY_BL R102 SSC-TWH104-HL LD105 SBIAS R107 SSENS Key Matrix and LEDs on KEY PCB LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. - 100 - Only for training and service purposes...
Page 100: Key Backlight
A_GND VREF1 VREF2 IREF2 C146 220n R136 TP114 PO_RESET PWRON KEY_BL Numeric Key Matrix and LEDs on F-KEY Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 101 - Only for training and service purposes...
Page 101 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 LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. - 102 - Only for training and service purposes...
Page 102: Sim & Usd Trouble
C405 0.1u C402 MMC_D(1) MMC_D(0) MMC_CLK MMC_CMD MMC_D(3) MMC_D(2) R411 MMC_DETECT VIO_2V62 C407 R412 C408 1000p TP1 TP2 Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 103 - Only for training and service purposes...
Page 103 1.8V & 2.9V SIM only Resolder S401 soldered connector well? Resolder Check connector TP1(2V8),TP2 Replace Main Check Proper SIM Card Board Assemble LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. - 104 - Only for training and service purposes...
Page 104 (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. LGE Internal Use Only - 105 - Only for training and service purposes...
Page 105: Rf Troubleshooting
Check DCXO Circuit Check RF Switch Circuit General function is OK. Fig 1 Troubleshooting flowchart of general circuits LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. - 106 - Only for training and service purposes...
Page 106 √ Output voltage (=LDO output of U102) - check LDO output voltage of U102 → I.e. VRF1_2V85 (C125), VRF2_1V5 (C118), VRF3_2V85 (C121) Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 107 - Only for training and service purposes...
Page 107 Fig 5 DCXO circuit (X100) √ The output voltage of X100 is 820mV p-p. Fig 6 Waveform of DCXO LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. - 108 - Only for training and service purposes...
Page 108 L504 L503 L502 L505 15nH 5.1nH 18nH 3.9nH GSM900 GSM850 DCS1800 PCS1900 Fig 8 RF S/W circuit (U501) Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 109 - Only for training and service purposes...
Page 109: Rf Receiver Path Troubleshooting
General Circuits Troubleshooting Check FEM Circuit After download S/W, Calibrate it. Fig 9 Troubleshooting flowchart of RF Receiver path LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. - 110 - Only for training and service purposes...
Page 110 R500 C500 Control Signal of FEM R501 L585 R500 R591 U501 U501 LSHS-C085FB Fig 11 FEM circuit (U501) Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 111 - Only for training and service purposes...
Page 111 √ When GSM band called, it must seem as below. (yellow is VC1, blue is VC2) √ When D/PCS band called, it must seem as below. (yellow is VC1, blue is VC2) LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. - 112 - Only for training and service purposes...
Page 112: Rf Transmitter Path Troubleshooting
Check Replace Control signal of After download S/W, Calibrate it. Fig 12 Troubleshooting flowchart of RF Transmitter path Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 113 - Only for training and service purposes...
Page 113 100p 100p 820p 2.7nH √ Check point of PAM - Transmitter output power (=R505, L572) is approximately 3dBm. LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. - 114 - Only for training and service purposes...
Page 114: Pam Circuit
Check the next part Fig 14 Debugging flowchart of PAM circuit √ When EGSM band called, it must seem as below. Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 115 - Only for training and service purposes...
Page 115 PA EN TX_RAMP PA_BAND PA_MODE √ When D/PCS band called, it must seem as below. TX_RAMP PA_MODE PA_BAND LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. - 116 - Only for training and service purposes...
Page 116 100p 100p 100p 820p 2.7nH Fig 15 PAM circuit (U500) 6.14.3 FEM Circuit See the 1.2.1 FEM Circuit. Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 117 - Only for training and service purposes...
Page 117: Download & S/W Upgrade
7.1 Download program user guide 1.After “GSMULTI” folder copy, paste C:\ 2. “MultiGSM.exe” execution file execute KC55 KC550 0 KC550 KC550 LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. - 118 - Only for training and service purposes...
Page 118: Multi-Download Program Setting
7.2 Multi-Download Program Setting(Model-Base) Multi-Download Program Execution → → Setting : Configuration ■ ■ Setting Completed KC550 KC550 Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 119 - Only for training and service purposes...
Page 119 7. Download & S/W upgrade Stand-by Condition: “Wait phone connecting” confirm → → Phone connection ■ K K C55 550 0 KC550 LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. - 120 - Only for training and service purposes...
Page 120: Circuit Diagram
UART_TX KEY_BL VCHG VCHAR VIO_2V62 ON_SW ON_SW RPWRON_EN VBAT VBAT VBAT VBUS_USB URXD USB_DM UTXD USB_DP I2C_SDA I2C_SCL Copyright © 2008 LG Electronics. Inc. All right reserved. - 121 - LGE Internal Use Only Only for training and service purposes...
Page 121 CAM_RESET CAM_SDA CAM_PD CAM_SCL R232 4.7K 1V8_VMM C276 R233 4.7K EVLC18S02003 EVLC18S02003 EVLC18S02003 EVLC18S02003 C278 C279 C280 ICVL0518100Y500FR LGE Internal Use Only - 122 - Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 122 ACCEL_INT KP_OUT(0) MIC_P TP301 I2C_SCL KP_OUT(1) MIC_N C325 C326 2200p 0.1u KP_OUT(2) KP_OUT(3) KEY_BL KP_OUT(4) FLIP_OPEN C327 2.2u Copyright © 2008 LG Electronics. Inc. All right reserved. - 123 - LGE Internal Use Only Only for training and service purposes...
Page 123 0.1u IUSB CN401 R420 C413 C414 5.1K R421 R419 C415 BAT_ID R422 100p C417 C418 C419 2.2u C416 LGE Internal Use Only - 124 - Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 124 C549 FB501 TP506 0.1u BT_INT R527 TP507 C551 BT_VCXO_EN C553 C550 2.2u 2.2u 0.01u BT_RESET C554 0.1u VIO_2V62 Copyright © 2008 LG Electronics. Inc. All right reserved. - 125 - LGE Internal Use Only Only for training and service purposes...
Page 125 SGND WPWMIN LCD_PWM FLASHCNT C110 C106 LEDGND FLASHCNT TP101 C103 KEY_BL R105 2.2u LD104 SSC-TWH104-HL R103 LD103 SSC-TWH104-HL LGE Internal Use Only - 126 - Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 126 DIF_D(10) DIF_RESET DIF_D(11) BL_RESETB DIF_D(12) I2C_SDA DIF_D(13) 2V8_CAM 1V8_CAM I2C_SCL DIF_D(14) FLASHCNT DIF_D(15) DTX0 LCD_ID DTX1 END_KEY DTX3 Copyright © 2007 LG Electronics. Inc. All right reserved. - 127 - LGE Internal Use Only Only for training and service purposes...
Page 127 L101 VMIC 100nH MIC_P C104 MIC101 100p 0.1u C103 C105 MIC_N 0.1u SPM0204HE5-PB-3 C107 VA111 C108 EVLC14S02050 C109 LGE Internal Use Only - 128 - Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 130: Bgm Pin Map
9. BGM Pin Map 9. BGM Pin Map BGA IC Pin Check (U104, PMB8888) Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 131 - Only for training and service purposes...
Page 135 9. BGM Pin Map BGA IC Pin Check (U101 in Key PCB, BD6095) : Not in use LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. - 136 - Only for training and service purposes...
Page 136: Pcb Layout
No booting No MIC No numeric key U304 Accel IC No accel sensing U304 Accel IC No accel sensing Copyright © 2008 LG Electronics. Inc. All right reserved. - 137 - LGE Internal Use Only Only for training and service purposes...
Page 137 No Power On U202 Sub PMIC U204 Analog Switch No LCD, No Camera No sound Speaker, No Power on Headset LGE Internal Use Only - 138 - Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 144: Rf Calibration
11.1 Test Equipment Setup 4.00 V 0.000 A 11.2 Calibration Step 11.2.1 Turn on the Phone. 11.2.2 Execute “HK_30.exe” Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 145 - Only for training and service purposes...
Page 145 11. RF Calibration 11.2.3 Click “SETTING” Menu 11.2.4 Setup “Ezlooks’ menu such as the following figure LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. - 146 - Only for training and service purposes...
Page 146 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. LGE Internal Use Only - 147 - Only for training and service purposes...
Page 147 11. RF Calibration 11.2.7 Select “MODEL”. 11.2.8 Click “START” for RF calibration 11.2.9 RF Calibration finishes. LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. - 148 - Only for training and service purposes...
Page 148 11. RF Calibration 11.2.10 Calibration data will be saved to the following folder. Saving format: year/month/day_PASS Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 149 - Only for training and service purposes...
Page 149 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> LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. - 150 - Only for training and service purposes...
Page 150: Stand-Alone Test
3 Confirm EEPROM & Delta file prefix name.(mpelite) ➀ ➁ ➂ 4 Click “Update Info” for communicating Phone and Test-Program. Not Connected ➃ Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 151 - Only for training and service purposes...
Page 151 6 Select “Non signaling” in the Quick Bar menu. Then Standalone Test setup is finished. ⑥ ➄ Change "ptest mood" LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. - 152 - Only for training and service purposes...
Page 152: Tx Test
3 Select “Tx” in the RF mode menu and “PCL” in the PA Level menu. 4 Finally, Click “Write All” bar and try the efficiency test of Phone. ➃ ➁ ➂ Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 153 - Only for training and service purposes...
Page 153: Rx Test
5 Change the Phone to “normal mode” and then Click the “Reset” bar. ➄ ➃ Change "normal mode " LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. - 154 - Only for training and service purposes...
Page 154: Engineering Mode
[6-9-1] FM Radio Test [3-6] MemGenConf [3-7] MemAllUse [6-10] Touchpad Test [3-8] MemDetUse [3-9] MemDump [3-10] Change Frequency Band Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 155 - Only for training and service purposes...
Page 156: Exploded View & Replacement Part List
14. EXPLODED VIEW & REPLACEMENT PART LIST 14.1 EXPLODED VIEW 61 62 Copyright © 2008 LG Electronics. Inc. All right reserved. - 157 - LGE Internal Use Only Only for training and service purposes...
Page 158: Replacement Parts
MIDZ0179801 5PI X 1.5PI X 0.05T Yellow MLAB00 LABEL,A/S MLAB0004801 PRINTING, (empty), , , , , Without Color Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 159 - Only for training and service purposes...
Page 159 MIDZ001 INSULATOR MIDZ0173601 COMPLEX, (empty), , , , , Without Color MMAA00 MAGNET,SWITCH MMAA0000901 G7000 12x2x0.7t Metal Silver LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. - 160 - Only for training and service purposes...
Page 160 MTAC0066801 COMPLEX, (empty), , , , , Gold MTAK00 TAPE,CAMERA MTAK0009801 COMPLEX, (empty), , , , , Black Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 161 - Only for training and service purposes...
Page 161 TAPE,SHIELD MTAC0072601 COMPLEX, (empty), , , , , Silver MLAZ00 LABEL MLAZ0038301 PID Label 4 Array Without Color LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. - 162 - Only for training and service purposes...
Page 162: Main Component
F_KEY PCB ASSY, SACB00 SACB0045401 F_KEY FLEXIBLE,INSERT SACE00 PCB ASSY,FLEXIBLE,SMT SACE0068301 F_KEY PCB ASSY,FLEXIBLE,SMT SACC00 SACC0045401 F_KEY BOTTOM Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 163 - Only for training and service purposes...
Page 163 5.6 V, ,SMD ,100pF, 1005 VA107 VARISTOR SEVY0003601 5.6 V, ,SMD ,100pF, 1005 VA108 VARISTOR SEVY0003601 5.6 V, ,SMD ,100pF, 1005 LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. - 164 - Only for training and service purposes...
Page 164 14 V, ,SMD ,50pF, 1005 VA106 VARISTOR SEVY0001001 14 V, ,SMD ,50pF, 1005 VA107 VARISTOR SEVY0003601 5.6 V, ,SMD ,100pF, 1005 Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 165 - Only for training and service purposes...
Page 165 PCB ASSY,MAIN,INSERT SAFB0085901 SACY00 PCB ASSY,FLEXIBLE SACY0073801 F_FLASH SACE00 PCB ASSY,FLEXIBLE,SMT SACE0068401 F_FLASH PCB ASSY,FLEXIBLE,SMT SACD00 SACD0057801 F_FLASH LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. - 166 - Only for training and service purposes...
Page 166 CAP,TANTAL,CHIP ECTH0005202 ,[empty] , ,[empty] ,[empty] ,[empty] ,[empty] C232 CAP,CERAMIC,CHIP ECCH0004904 1 uF,6.3V ,K ,X5R ,TC ,1005 ,R/TP Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 167 - Only for training and service purposes...
Page 167 10 uF,10V ,M ,STD ,1608 ,R/TP ,; , ,[empty] ,[empty] , ,- C308 CAP,TANTAL,CHIP ECTH0004807 55TO+125C , ,[empty] ,[empty] ,[empty] ,[empty] LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. - 168 - Only for training and service purposes...
Page 168 ECZH0003103 0.1 uF,10V ,K ,X7R ,HD ,1005 ,R/TP C533 CAP,CERAMIC,CHIP ECCH0000198 2.2 uF,6.3V ,M ,X5R ,TC ,1005 ,R/TP Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 169 - Only for training and service purposes...
Page 169 FB304 FILTER,BEAD,CHIP SFBH0008103 ,SMD ,R/TP 1000 ohm,1005 ,chip bead, 200mA,DCR0.9ohm ,; , , FB305 FILTER,BEAD,CHIP SFBH0008103 ,SMD ,R/TP LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. - 170 - Only for training and service purposes...
Page 170 VMT3 ,0.15 W,R/TP , Q402 TR,BJT,NPN EQBN0017601 VMT3 ,0.15 W,R/TP , PCB ASSY,MAIN,PAD R211 SAFP0000501 SHORT PCB ASSY,MAIN,PAD R214 SAFP0000501 SHORT Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 171 - Only for training and service purposes...
Page 171 R504 CAP,CHIP,MAKER ECZH0000813 100 pF,50V ,J ,NP0 ,TC ,1005 ,R/TP R514 RES,CHIP,MAKER ERHZ0000434 1 ohm,1/16W ,J ,1005 ,R/TP LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. - 172 - Only for training and service purposes...
Page 172 ,10 PIN,R/TP ,High Speed USB Siwitch 2.0 3.7pF U302 EUSY0338301 6.5ohm 1.4X1.8 DFN ,14 PIN,R/TP ,700mA Boost converter ,; ,IC,DC,DC U303 EUSY0264502 Converter Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 173 - Only for training and service purposes...
Page 173 ECCH0004904 1 uF,6.3V ,K ,X5R ,TC ,1005 ,R/TP C126 CAP,CHIP,MAKER ECZH0001216 220 nF,10V ,K ,X5R ,TC ,1005 ,R/TP LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. - 174 - Only for training and service purposes...
Page 174 0.1 uF,10V ,K ,X7R ,HD ,1005 ,R/TP C224 CAP,CHIP,MAKER ECZH0003103 0.1 uF,10V ,K ,X7R ,HD ,1005 ,R/TP C225 CAP,CERAMIC,CHIP ECCH0000110 10 pF,50V,D,NP0,TC,1005,R/TP Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 175 - Only for training and service purposes...
Page 175 ECZH0000830 33 pF,50V ,J ,NP0 ,TC ,1005 ,R/TP C510 CAP,CHIP,MAKER ECZH0000802 1 pF,50V ,C ,NP0 ,TC ,1005 ,R/TP LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. - 176 - Only for training and service purposes...
Page 176 FB204 FILTER,BEAD,CHIP SFBH0007102 10 ohm,1005 ,Ferrite Bead SMD ,SMD ,18 V,4ch. EMI_ESD Filter (100Ohm,15pF), FB301 FILTER,EMI/POWER SFEY0010501 Pb-free Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 177 - Only for training and service purposes...
Page 177 PCB ASSY,MAIN,PAD R104 SAFP0000501 SHORT PCB ASSY,MAIN,PAD R105 SAFP0000501 SHORT R106 RES,CHIP,MAKER ERHZ0000406 100 Kohm,1/16W ,J ,1005 ,R/TP LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. - 178 - Only for training and service purposes...
Page 178 680 ohm,1/16W ,J ,1005 ,R/TP R145 RES,CHIP,MAKER ERHZ0000505 680 ohm,1/16W ,J ,1005 ,R/TP R146 RES,CHIP,MAKER ERHZ0000505 680 ohm,1/16W ,J ,1005 ,R/TP Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 179 - Only for training and service purposes...
Page 179 15K ohm,1/16W,F,1005,R/TP R420 RES,CHIP,MAKER ERHZ0000530 5.1 Kohm,1/16W ,J ,1005 ,R/TP R421 RES,CHIP,MAKER ERHZ0000268 33 Kohm,1/16W ,F ,1005 ,R/TP LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. - 180 - Only for training and service purposes...
Page 180 X102 X-TAL EXXY0024301 ,-40'C ~ +85'C, C0 1.05pF, C1 fF ,; ,32.768 ,20PPM ,12.5 , , ,SMD ,R/TP Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 181 - Only for training and service purposes...
Page 181: Accessory
100-240V ,5060 Hz,5.1 V,.7 A,CE ,AC-DC ADAPTOR ,; ADAPTOR,AC-DC SSAD0025002 ,85Vac~264Vac ,5.1V +0.15V, -0.2V ,700mA ,5060 , ,WALL 2P ,I/O CONNECTOR , LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. - 182 - Only for training and service purposes...
Page 182 Note...
Page 183 Note...

LG KC550 Service Manual

1 Introduction

2 General Performance

3 Technical Brief

4 RF Circuit Technical Brief

5 PCB Layout

6 Trouble Shooting

7 Download & S/W Upgrade

8 Circuit Diagram

9 Bgm Pin Map

10 Pcb Layout

11 RF Calibration

12 Stand-Alone Test

13 Engineering Mode

14 Exploded View & Replacement Part List

Quick Links

Troubleshooting

Need help?

Questions and answers

Related Manuals for LG KC550

Summary of Contents for LG KC550

Table of Contents