Page 1 Service Manual U370 Date: January, 2008 / Issue 1.0...
Page 2: Table Of Contents
4.9 Charger Troubleshooting ......90 4.10 USB Troubleshooting.......92 4.11 SIM Detect Troubleshooting ....93 4.12 Camera Troubleshooting ......96 4.13 LCD module Troubleshooting ....99 Copyright © 2007 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 © 2007 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 © 2007 LG Electronics. Inc. All right reserved. - 6 - Only for training and service purposes...
Page 6: Performance
LED Indicator Receiver Earphone Jack Yes (18 pin) Connectivity Bluetooth, USB External Memory Yes(Micro SD) I/O Connect 18 Pin Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 7 - Only for training and service purposes...
Page 7: Usable Environment
* In case of DCS : [A] -> 1710, [B] -> 1785 * In case of PCS : [A] -> 1850, [B] -> 1910 LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. - 8 - Only for training and service purposes...
Page 8: Only For Training And Service Purposes
** In case of DCS : [A] -> 1710, [B] -> 1785 * In case of PCS : [A] -> 1850, [B] -> 1910 Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 9 -...
Page 9: Only For Training And Service Purposes
±4 ±3 ±4 ±5 ±4 ±5 ±4 ±5 ±4 ±5 ±5 ±5 Burst timing Mask IN Mask IN LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. - 10 - Only for training and service purposes...
Page 10: Only For Training And Service Purposes
Power setting in uplink compressed ±3dB(after 14slots transmission gap) Occupied Bandwidth(OBW) 5MHz(99%) -35-15*(∆f-2.5)dBc@∆f=2.5~3.5MHz,30k -35-1*(∆f-3.5)dBc@∆f=3.5~7.5MHz,1M Spectrum emission Mask -39-10*(∆f-7.5)dBc@∆f=7.5~8.5MHz,1M -49dBc@∆f=8.5~12.5MHz,1M Copyright © 2007 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
Wanted Signal :-101dBm Wanted Signal :-101dBm (TCH/FS Class II, RBER) Unwanted : Depend on Frequency Unwanted : Depend on Frequency LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. - 12 - Only for training and service purposes...
Page 12: Only For Training And Service Purposes
-46dBm/3.84MHz@20MHz UE@+20dBm output power(Class3) -57dBm@f=9KHz~1GHz, 100K BW Spurious Emissions -47dBm@f=1~12.5GHz, 1M BW -60dBm@f=1920MHz~1980MHz, 3.84M BW -60dBm@f=2110MHz~2170MHz, 3.84M BW Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 13 - Only for training and service purposes...
Page 13: Current Consumption
-108 ± 2 dBm -100 ± 2 dBm BAR 1 → 0 -118 ± 2 dBm -105 ± 2 dBm LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. - 14 - Only for training and service purposes...
Page 14: Battery Bar
3.57 ± 0.05V (Stand-by) / 3.57 ± 0.05V (Talk) Low Voltage, Warning message+ Blinking [Interval : 3min(Stand-by) / 1min(Talk)] 3.20 ± 0.05V Power Off Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 15 - Only for training and service purposes...
Page 15: Sound Pressure Level
• Full charging indication current (charging icon stop current) : 80 mA • Cut-off voltage : 3.20 V LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. - 16 - Only for training and service purposes...
Page 16: Technical Brief
3. TECHNICAL BRIEF 3. TECHNICAL BRIEF 3.1 General Description The U370 supports UMTS-2100, GSM-900, DCS-1800, and PCS-1900 based GSM/GPRS/UMTS. All receivers and the UMTS transmitter use the radioOne Zero-IF architecture to eliminate intermediate frequencies, directly converting signals between RF and baseband. The quad-band GSM transmitters use a baseband-to-IF upconversion followed by an offset phase-locked loop that translates the GMSK- modulated signal to RF.
Page 17: Only For Training And Service Purposes
3. TECHNICAL BRIEF A generic, high-level functional block diagram of U370 is shown in Figure 1-1. One antenna collects base station forward link signals and radiates handset reverse link signals. The antenna connects with receive and transmit paths through a FEM(Front End Module).
Page 18: Gsm Mode
DCS and PCS). The antenna switch module allows multiple operating bands and modes to share the same antenna. In U370, a common antenna connects to one of six paths: 1) UMTS-2100 Rx/Tx, 2) GSM-900 Rx, 3) GSM-900 Tx, 4) DCS-1800 Rx, and 5) DCS-1800 Tx, PCS- 1900 Tx(High Band Tx’s share the same path), 6) PCS-1900 Rx.
Page 19: Only For Training And Service Purposes
DC offset corrections. The filter outputs are buffered and passed on to the MSM6245 IC for further processing (an interface shared with the RFR6275 UMTS receiver outputs). LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. - 20 - Only for training and service purposes...
Page 20: Only For Training And Service Purposes
3. TECHNICAL BRIEF [Fig 1.2] RTR6275 RX feature Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 21 - Only for training and service purposes...
Page 21: Only For Training And Service Purposes
PA and appear in the GSM Rx band LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. - 22 - Only for training and service purposes...
Page 22: Umts Mode
F The RTR6275 IC is able to support UMTS 2100/1900 and UMTS 850 mode transmitting. This design guideline shows only UMTS 2100 applications. Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 23 -...
Page 23: Only For Training And Service Purposes
3. TECHNICAL BRIEF WCDMA_2100_TX WCDMA_2100_RX [Figure 1.4] RTR6275 IC functional block diagram LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. - 24 - Only for training and service purposes...
Page 24: Lo Generation And Distribution Circuits
PA_ON CP0402A1950DNTR VREG_TCXO_2.85V PWR_DET R120 C167 C435 R121 R122 100p L122 1.8nH [Figure 1.5] WCDMA PAM, Duplexer, Coupler Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 25 - Only for training and service purposes...
Page 25: Only For Training And Service Purposes
The active connection is MSM-selected by three control lines (GPIO[9], GPIO[10]). Two GPIO are programmed to be ANT_SEL0_N, ANT_SEL1_N) respectively. [Table 1.2] Front End Module control logic LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. - 26 - Only for training and service purposes...
Page 26: Only For Training And Service Purposes
- Vibration motor driver programmable from 1.2 to 3.1V in 100 mV increments - Speaker driver with programmable gain, turn-on time, and muting; differential operation (drives external 8 Ω speakers with volume controlled 500 mW) Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 27 -...
Page 27: Only For Training And Service Purposes
• Highly integrated functionality in a small package - 84-pin BCCS with a large center slug for electrical ground, mechanical stability, and thermal relief [Figure 1.6] MSM6245 Interface LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. - 28 - Only for training and service purposes...
Page 28: Only For Training And Service Purposes
3. TECHNICAL BRIEF [Figure1.7] PM6650 Block Diagram Copyright © 2007 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
C150 SKY77318 P_GND 100p EFCH897MTDB1 GSM_PA_BAND GSM_PA_BAND MODE C154 100p DCS/PCS HIGH [Figure 1. 8] GSM PAM Schematic LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. - 30 - Only for training and service purposes...
Page 30: Only For Training And Service Purposes
QUALCOMM strongly recommends an isolator be used between the UMTS PA and duplexer to assure proper performance. Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 31 -...
Page 31: Only For Training And Service Purposes
❏ Other frequencies of particular concern . bands known to include other wireless transmitters that may deliver significant power levels to the receiver input. Table 1.3 WCDMA Rx SAW Filter Specification LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. - 32 - Only for training and service purposes...
Page 32: Only For Training And Service Purposes
RF module and Antenna. Figure1.5 shows the bluetooth system architecture in the KU370. MSM6245 Bluetooth baseband [Figure1.5] Bluetooth system architecture Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 33 - Only for training and service purposes...
Page 33: Digital Baseband(Dbb/Msm6245)
■ Advanced 14 x 14 mm, 0.5 mm pitch, 409-pin lead-free CSP packaging technology ■ SD/SDIO hardware support LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. - 34 - Only for training and service purposes...
Page 34: Only For Training And Service Purposes
WCDMA2100 Tx NAND, SDRAM WCDMA Duplexer FLASH WCDMA2100 Rx WCDMA KEYPAD RX SAW AntSW Logic Figure. Simplified Block Diagram Copyright © 2007 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
Rx ADC EVRC, QCELP AMR, CMX, MIDI Tx DAC USIM PM6650 US B Figure. Simplified Block Diagram of MSM6245 LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. - 36 - Only for training and service purposes...
Page 36: Subsystem(Msm6245)
■ PS data rate - 384 kbps DL / 384 kbps UL ■ CS data rate - 64 kbps DL / 64 kbps UL ■ AMR (all rates) Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 37 -...
Page 37: Only For Training And Service Purposes
■ PBCCH support ■ 1 phase/2 phase access procedures ■ Link adaptation and IR ■ NACC, extended UL TBF. LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. - 38 - Only for training and service purposes...
Page 38: Only For Training And Service Purposes
- 2 chip selects supported for NAND Flash ❏ Boot from NAND ❏ Low-power SDRAM (LP-SDRAM) interface ■ Internal watchdog and sleep timers Copyright © 2007 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
■ A two-way mobile video conferencing solution that delivers 15 fps @ QCIF, 64kbps ■ Video codecs supported: MPEG-4 and H.263 ■ Audio codecs supported: AMR-NB. LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. - 40 - Only for training and service purposes...
Page 40: Only For Training And Service Purposes
■ Scalable Vector Graphics (SVG- Tiny 1.1 + SVG Tiny 1.2) ■ MLZ decoder ■ Integrated PNG/SAF A.T. Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 41 - Only for training and service purposes...
Page 42: Only For Training And Service Purposes
ANSI/IEEE 1149.1A-1993 feature list. The JTAG interface can be used to test digital interconnects between devices within the mobile station during manufacture. Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only...
Page 43: Only For Training And Service Purposes
The USB controller acts as a USB peripheral communicating with the USB host. MSM6245 supports the 3-wire functionality. LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. - 44 - Only for training and service purposes...
Page 44: Power Block
MSM device controls and statuses the PM6650 IC using Single Serial Bus Interface (SSBI) supplemented by an Interrupt Manager for time-critical information. Another dedicated IC Interface circuit monitors multiple trigger events and controls the power-on sequence. Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 45 -...
Page 45: Only For Training And Service Purposes
3. TECHNICAL BRIEF Figure 1-1. PM6650 Functional Block Diagram LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. - 46 - Only for training and service purposes...
Page 46: Only For Training And Service Purposes
4.2V~3.80V 3.80V~3.71V 2~0 (%) 44~20 (%) 19~3 (%) 100~70 (%) 69~45 (%) U370 Battery Bar Display(Stand By Condition) Copyright © 2007 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
(VBAT). Trickle charging can be used for lithium-ion and nickelbased batteries, with its performance specified below (3.2V). The charging current is set to 80mA. Parameter Unit Trickle Current LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. - 48 - Only for training and service purposes...
Page 48: Only For Training And Service Purposes
• Low battery POP UP : Idle - 3.57V, Dedicated(GSM/WCDMA) - 3.57V • Low battery alarm interval : Idle - 3 min, Dedicated - 1min • Cut-off voltage : 3.20V Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 49 -...
Page 49: External Memory Interface
FLASH TY9000A800KOGG Toshiba 60 ns 60 ns SDRAM TY9000A800KOGG Toshiba 7 ns 7 ns Table#1. External memory interface LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. - 50 - Only for training and service purposes...
Page 50: Only For Training And Service Purposes
SDRAM NAND_WP* CAS* MSM6245 512Mb RAS* NAND_ALE CLK_EN NAND_READY DATA[15:0] DQM[3:0] Figure. Simplified Block Diagram of Memory Interface Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 51 - Only for training and service purposes...
Page 51: H/W Sub System
BT_CLK BT_SBST_GPIO24 BT_SBST BT_SBCK_GPIO23 BT_SBCK BT_SBDT_GPIO22 BT_SBDT BT_TX_RX_N_GPIO21 BT_TX_RX_N BT_DATA_GPIO20 BT_DATA Figure. Schematic of RF Interface of MSM6245 LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. - 52 - Only for training and service purposes...
Page 52: Only For Training And Service Purposes
• GSM_PA_BAND : GSM/DCS-PCS Band Selection of Power Amp • GSM_PA_RAMP : Power Amp Gain Control of APC_IC • GSM_PA_EN : Power Amp Gain Control Enable of APC_IC Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 53 -...
Page 53: Only For Training And Service Purposes
UART signals are connected to MSM GPIO through IO connector with 115200 bps speed. GPIO_Map Name Note GPIO_96 UART_RXD Data_Rx GPIO_95 UART_TXD Data_Tx Table. UART Interface LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. - 54 - Only for training and service purposes...
Page 54: Only For Training And Service Purposes
USB_SE0 USB_D- USB_D_M GP1_DRV_N(MPP7) R309 2.2K C331 4.7u 1608 Figure. Schematic of USB block(MSM6245 Side & PM6650 Side) Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 55 - Only for training and service purposes...
Page 55: Only For Training And Service Purposes
Ear jack Detection for TTY HKADC4 PCB_Rev_ADC PCB Version Check HKADC5 Battery_THERM Battery Temperature Check Table. HKADC channel table LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. - 56 - Only for training and service purposes...
Page 56: Only For Training And Service Purposes
KEY_ROW(2) SEARCH KEY_ROW(3) HOT400 HOT401 BACK HOT4 HOT3 KEY_ROW(4) KEY_COL(0) KEY_COL(1) KEY_COL(2) KEY_COL(3) KEY_COL(4) Figure. Main Keypad Circuit Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 57 - Only for training and service purposes...
Page 57: Only For Training And Service Purposes
CAM_DATA(4) CAM_VSYNC CAM_DATA(3) CAM_HSYNC CAM_DATA(2) CAM_MCLK CAM_DATA(1) CAM_DATA(0) VREG_CAM_AVDD_2.8V CAM_PCLK VREG_CAM_DVDD_2.8V CAM_RESET_N VREG_CAM_DVDD_1.8V Figure. Camera Socket Type Connector LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. - 58 - Only for training and service purposes...
Page 58: Only For Training And Service Purposes
Vertical Sync I2C_SDA I2C Data I2C Clock I2C_SCL Table. Interface between Camera Module and MAIN FPCB (in camera module) Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 59 - Only for training and service purposes...
Page 59 - Display mode(Main LCD) : Normally White, Transmissive TFT 265K colors. (Sub LCD) : Normally Black, Transmissive Mono STN. - 16 bit CPU interface Parallel LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. - 60 - Only for training and service purposes...
Page 60: Only For Training And Service Purposes
EBI2_DATA(7) EBI2_DATA(9) WLED_PWR EBI2_DATA(8) WLED_1 SPK_RCV- WLED_2 SPK_RCV+ WLED_3 AXK8L40125G Figure. Interface between LCD Module and MAIN FPCB. Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 61 - Only for training and service purposes...
Page 61: Only For Training And Service Purposes
The microphone interface consists of two differential microphone inputs, one differential auxiliary input and a two-stage audio amplifier. Figure. Audio Interface Detailed Diagram(MSM6245) LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. - 62 - Only for training and service purposes...
Page 62: Only For Training And Service Purposes
R405 100ohm HPH_L C404 R406 100ohm HPH_R USB_D+ USB_D- EAR_SENSE_N VBATT R412 470K Figure . Audio part schematics Copyright © 2007 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
VDD1 +VPWR VDD2 C406 0.01u U403 LINE_P R410 SPK- SPK_AMP_EN SPK+ C408 C412 Figure . Audio part schematics LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. - 64 - Only for training and service purposes...
Page 64: Only For Training And Service Purposes
Dual Analog Switch Speaker/Receiver EMS1810TP Speaker/Receiver MIC400 SP0204LE5 -42 dB microphone Ear-Mic HC-MYD-LG001 Ear-Mic Table. Audio main component list Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 65 - Only for training and service purposes...
Page 65: Main Features
- MP3/AAC decoder and play - MPEG4 encoder/decoder and play/save - JPEG en/decoder - Supports Bluetooth, USB - 850 mAh (Li-Ion) LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. - 66 - Only for training and service purposes...
Page 66: Only For Training And Service Purposes
2. U370 Main Component Bluetooth Sub board (Top) Sub board (Bottom) Audio Power Base Band Main board (Bottom) Main board (Top) Copyright © 2007 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
RTR6275 SW100 Ant. Switch Module FL102 W2100 Duplexer U104 WCDMA PAM U100 Front End Module U102 GSM PAM LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. - 68 - Only for training and service purposes...
Page 68: Only For Training And Service Purposes
U301 Memory U403 Audio Amplifier U302 LDO for Camera X100 19.2 Mhz TCXO U303 Dual LDO for Camera Copyright © 2007 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
ANT1 MIC400 Reference Description Reference Description J300 USIM Connector ANT1 BlueTooth Antenna MIC400 Microphone BlueTooth Module T-Flash Socket LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. - 70 - Only for training and service purposes...
Page 70: Trouble Shooting
4. TROUBLE SHOOTING 4. TROUBLE SHOOTING 4.1 RF Component MAIN_BOTTOM & TOP SIDE Copyright © 2007 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
4. TROUBLE SHOOTING Sub-BOTTOM & TOP SIDE LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. - 72 - Only for training and service purposes...
Page 73: Signal Path_Umts Rf
4.2 SIGNAL PATH_UMTS RF Common Tx/Rx UMTX 2100 UMTX 2100 Tx UMTX 2100 Rx Tx I/Q RX I/Q LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. - 74 - Only for training and service purposes...
Page 74: Signal Path_Gsm Rf
4.3 SIGNAL PATH_GSM RF Common GSM900 Tx DCS/PCS Tx EGSM900 RX PCS Rx DCS RX Tx I/Q RX I/Q Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 75 - Only for training and service purposes...
Page 75: Checking Vc-Tcxo Block
C173 TCXO_PM 1000p C174 1000p C175 0.01u RTR6275_TCXO TCXO_BT U105 TC7SH04FU X100 Test Point of the VC-TCXO Block LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. - 76 - Only for training and service purposes...
Page 76: Only For Training And Service Purposes
4. TROUBLE SHOOTING Check C312 of PMIC (U300) Ch eck R213 of MSM (U200) Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 77 - Only for training and service purposes...
Page 77: Checking Front-End Module Block
GSM18001900_TX C122 C123 Schematic of the Front-End Module Block U100 FL102 Test Point of the Front-End Module Block LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. - 78 - Only for training and service purposes...
Page 78: Only For Training And Service Purposes
4. TROUBLE SHOOTING Logic Table of the FEM TP1 VREG RF SMPS Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 79 - Only for training and service purposes...
Page 79: Checking Umts Block
CP0402A1950DNTR VREG_TCXO_2.85 PWR_DET R120 C167 C435 R121 R122 100p For testing, Max power of UMT 2100 is needed. LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. - 80 - Only for training and service purposes...
Page 81: Only For Training And Service Purposes
6. PA_R0 : Control signals that step the active PA mode and bias +VPWR PWR_DET PA_R0 U100 U104 TR100 VREG_TCXO_2.85V PA_ON U101 LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. - 82 - Only for training and service purposes...
Page 82: Only For Training And Service Purposes
KRX102U U103 PA_ON CP0402A1950DNTR VREG_TCXO_2.85V PWR_DET R120 C167 C435 R121 R122 TR100 100p L122 C168 1.8nH L123 2.7nH Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 83 - Only for training and service purposes...
Page 84: Checking Bluetooth Block
2.2u VDD_INT SYNC_DET_TX_EN BT_TX_RX_N VREG_MSMP_2.7V VDD_MSM RX_BB_TX_BB BT_DATA 1000p VREG_BT_2.85V VDD_BAT XTAL_IN TCXO_BT Schematic of the Bluetooth Block Copyright © 2007 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
2.85 V, 2.7 V exist? nge the X100 Is clock ok? 19.2MHz Change the M1 Signals exits? Change the Main board LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. - 86 - Only for training and service purposes...
Page 86: Power On Troubleshooting
Check the TCXO R306 : TCXO_MSM ( 19.2 Mhz) and PM6650 TP311 : ( 32.768 Khz) Change the Main board Copyright © 2007 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
4. TROUBLE SHOOTING X300 : 32.768Khz VREG_MSME VREG_MSMA VREG_MSMC VREG_MSMP MSM6245 R306 : 19.2Mhz [ U370 Main PCB BOTTOM ] LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. - 88 - Only for training and service purposes...
Page 88: Only For Training And Service Purposes
4. TROUBLE SHOOTING X300 : 32.768Khz R306 : 19.2Mhz Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 89 - Only for training and service purposes...
Page 89: Charger Troubleshooting
- Check the charger (TA or USB Cable) connector - Check the charging current Path - Check the battery LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. - 90 - Only for training and service purposes...
Page 90: Only For Training And Service Purposes
Change the Main board [ Charger Troubleshooting Flow ] U304 R315 [ Charging part ( Main PCB) ] Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 91 - Only for training and service purposes...
Page 91: Usb Troubleshooting
4. TROUBLE SHOOTING 4.10 USB Troubleshooting USB Initial sequence of U370 is : USB connected to U370 power on → USB_VBUS(Q300) go to 5V → USB_D+ go to 3.3V → USB_DAT is triggered → USB work. Start Power on was OK ?
Page 92: Sim Detect Troubleshooting
Check J300 ( USIM Connector) USIM_P_CLK is run Change the SIM card Work well ? Change the Main board Copyright © 2007 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
HSSC-8P-18 VREG_USIM_2.85V GND1 USIM_P_RST_N USIM_P_DATA USIM_P_CLK RSV2 RSV1 GND2 GND5 GND3 GND4 L303 56nH Figure. USIM part schematics LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. - 94 - Only for training and service purposes...
Page 94: Only For Training And Service Purposes
4. TROUBLE SHOOTING USIM_P_CLK Waveform After Boot-up Enlarger Waveform of USIM_P_CLK Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 95 - Only for training and service purposes...
Page 95: Camera Troubleshooting
Check the CAM_MCLK Change the Main Board Change the Camera Module Camera is OK ? Change the Main board LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. - 96 - Only for training and service purposes...
Page 96: Only For Training And Service Purposes
CAM_DATA_OUT(5) AVDD_2.8V CAM_DATA_OUT(4) CAM_DATA_OUT(3) MCLK CAM_HSYNC CAM_DATA_OUT(2) CAM_DATA_OUT(1) CAM_VSYNC CAM_DATA_OUT(0) CAM_PCLK I2C_SDA CAM_RESET_N I2C_SCL CAM_PWR_DN Camera Pin Map Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 97 - Only for training and service purposes...
Page 97: Only For Training And Service Purposes
+VPWR VOUT1 VREG_CAM_DVDD_1.5V CAM_LDO_EN VOUT2 VREG_CAM_AVDD_2.8V C430 C348 C347 U303 U346 U347 REV_C ( 10uF Cap Delete ) LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. - 98 - Only for training and service purposes...
Page 98: Lcd Module Troubleshooting
LCD Display is OK ? Change the Main Board Change the LCD Module LCD Display is OK ? Change the Main board Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 99 - Only for training and service purposes...
Page 99: Only For Training And Service Purposes
EBI2_DATA(3) EBI2_DATA(13) EBI2_DATA(4) EBI2_DATA(12) EBI2_DATA(5) EBI2_DATA(11) EBI2_DATA(6) EBI2_DATA(10) EBI2_DATA(7) EBI2_DATA(9) WLED_PWR EBI2_DATA(8) WLED_1 SPK_RCV- WLED_2 SPK_RCV+ WLED_3 AXK8L40125G LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. - 100 - Only for training and service purposes...
Page 100: Receiver Path
PIN17, PIN19 of CN403? The sine wave appears Check the analog switch at R436, R437? Change the Main board Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 101 - Only for training and service purposes...
Page 102: Headset Path
Can you hear the tone? Sine wave appears Change Headset at R405, R406? Change the Main board Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 103 - Only for training and service purposes...
Page 104: Speaker Phone Path
SPK+ , SPK - * Pulse signal appears at Change Speaker SPK_RCV+ , SPK_RCV- ? Change the Main board Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 105 - Only for training and service purposes...
Page 106: Main Microphone
Wave appears at Change the MIC C407, C406 ? Wave appears at Change the Main board C407, C406 ? Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 107 - Only for training and service purposes...
Page 108: Headset Microphone
MICBIAS whether 1.8 V? Sine wave appears at Change the Headset C210 , C211 Check the Headset or Connector Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 109 - Only for training and service purposes...
Page 110: Download
LGMDP supports Windows 2000/XP where the LG (Ver 4.6 or later) USB modem driver is installed. Additionally, LGMDP allows multi downloading up to 9 handsets at the same time.
Page 111: Connecting To Pc
Then click on the Connect button. (The port number(COM7) shall be different from that of the port number in the snapshot.) LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. - 112 - Only for training and service purposes...
Page 112 • The status Ready is displayed when the application is ready for downloading. While the images are transmitted from PC to the handset, a progressive bar (Red box) indicating the degree of transmission of data is displayed. Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 113 -...
Page 113 3) NV Backup/Restore: NV Backup/Restore always have to be done, and it is default selected option. Backup the NV data and restore the backed up NV data automatically. LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. - 114 - Only for training and service purposes...
Page 114 Override partition table is also also defaultly not selected and user cannot choose. 6) Clear: Clearing all directory paths of images in the dialog. 7) Start: Starting downloading the selected individual image. Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 115 -...
Page 115 (The folder name shall be different from that of the folder name in the snapshot. The folder name indicates the path where the image files are located.) LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. - 116 - Only for training and service purposes...
Page 116 Make sure that you have chosen correct file. In case of wrong AMSS Modem file is selected, the phone may not work. (The file name shall be different from that of the file name in the snapshot.) Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only...
Page 117 NV file to be downloaded on the handset. To enable this simply check the box or select the NV file from the LGMDP installation directory by clicking on the Browse… button. LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. - 118 - Only for training and service purposes...
Page 118 Click on the No button if this is not the setting you are downloading for. Otherwise click on the Yes button to continue downloading selected image file with options. Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 119 -...
Page 119 • Erasing the existing directories and files before the Module image is downloaded. • Downloading the AMSS modem image LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. - 120 - Only for training and service purposes...
Page 120 • Rebooting the handset and re-establishing the connection • Erasing the existing directories and files before downloading the selected Media image Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 121 - Only for training and service purposes...
Page 121 • Downloading Module image in progress • Downloading Module image in progress • Rebooting handset • Downloading process has completed successfully LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. - 122 - Only for training and service purposes...
Page 122 USB connectivity and check where the COM has been installed . Select Device Manager from the Tools of the file menu. Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 123 -...
Page 123: Troubleshooting Download Errors
• The below dialog shows parameters of Select Port when phone is booted in Emergency mode. Click on the Connect button to continue. LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. - 124 - Only for training and service purposes...
Page 124 The selected image will be downloaded to the handset from the path directory in the PC. After downloading images successfully, it will boot to normal mode. Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only...
Page 125 5.3.2 NV Restore Error • Snapshot showing the NV Restore error. Next slide shows the remedial procedure to adopt. LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. - 126 - Only for training and service purposes...
Page 126 • Connect the handset and Press the Connect button in the Select Port window. (Enable state in the window indicates that the Phone has been detected and is ready to download.) Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only...
Page 127 NV Backup was done. Choose the desired NV file to be downloaded on the handset, and click on Start. LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. - 128 - Only for training and service purposes...
Page 128: Caution
4) Recommended that the Module and Media Image have to be downloaded at the same time. 5) Erase EFS option will erase everything (media, module, nv items, and user data) in the EFS area. Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only...
Page 129: Block Diagram
6. BLOCK DIAGRAM 6. BLOCK DIAGRAM 6.1 GSM & UMTS RF Block [Fig 2.1] KU370 RF Functional Block Diagram LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. - 130 - Only for training and service purposes...
Page 130 UMTS2100 TX SAW filter FL103 EFCH2140TDE1 UMTS2100 RX SAW filter RX FL102 A CMD-7602 UMTS2100 Duplexer [Table 2.1] RF Block Component Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 131 - Only for training and service purposes...
Page 131: Interface Diagram
RX SAW RX SAW KEYPAD KEYPAD AntSW Logi c AntSW Logi c [Fig 2.2] RTR6275 & MSM6245 Interface Diagram LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. - 132 - Only for training and service purposes...
Page 132: Memory Interface
6. BLOCK DIAGRAM 6.2.2 Memory Interface [Fig 2.3] Memory Interface Diagram Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 133 - Only for training and service purposes...
Page 133 6. BLOCK DIAGRAM 6.2.3 USB,UART,SIM,JTAG Interface [Fig 2.4] USB, UART, SIM, JTAG Interface LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. - 134 - Only for training and service purposes...
Page 134 GSM_PA_RAMP Power Amp Gain Control UMTS, GSM900Tx/Rx, ANT_SEL 0,1 Ant Switch Module Mode Selection DCS Tx/Rx, PCS Tx/Rx Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 135 - Only for training and service purposes...
Page 138: Circuit Diagram
C172 100p C173 TCXO_PM 1000p C174 1000p C175 0.01u RTR6275_TCXO TCXO_BT U105 TC7SH04FU LG(42)-A-5505-10:01 LG Electronics Inc. LGMC Copyright © 2007 LG Electronics. Inc. All right reserved. - 139 - LGE Internal Use Only Only for training and service purposes...
Page 139 UART_TXD R215 2.2K TP405 VREG_CAM_DVDD_2.8V UART_RXD TP406 (Check CAM_DATA PINOUT !!!!) 2.5G UART LG(42)-A-5505-10:01 LG Electronics Inc. LGMC LGE Internal Use Only - 140 - Copyright © 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 140 C355 WLED_PWR C356 LCD_BL_CTRL EN_SET WLED_1 C357 WLED_2 WLED_3 OJ300 OJ301 OJ302 OJ303 LG(42)-A-5505-10:01 LG Electronics Inc. LGMC Copyright © 2007 LG Electronics. Inc. All right reserved. - 141 - LGE Internal Use Only Only for training and service purposes...
Page 141 INOUT_B4 INOUT_A4 LD409 LEBB-S14H R426 100ohm FL408 REV_B : EDLH0013501 --> EDLH0006001 KYBD_BACKLIGHT LG(42)-A-5505-10:01 LG Electronics Inc. LGMC LGE Internal Use Only - 142 - Copyright © 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 142 KEY_ROW(2) 100ohm CMD_DI KEY_COL(5) MMC_CMD CLK_SCLK MMC_CLK KEY0 DAT0_DO MMC_DATA DAT1_RSV 470K 0.1u LG(42)-A-5505-10:01 LG Electronics Inc. LGMC Copyright © 2007 LG Electronics. Inc. All right reserved. - 143 - LGE Internal Use Only Only for training and service purposes...
Page 143 CAM_DATA(0) VREG_CAM_AVDD_2.8V CAM_PCLK VREG_CAM_DVDD_2.8V CAM_RESET_N VREG_CAM_DVDD_1.8V FPCB_TO_CAMERA CONNECTOR TP4 TP5 TP6 VISION MARK LGIC(42)-A-5505-10:01 LG Electronics Inc. LGMC LGE Internal Use Only - 144 - Copyright © 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 144: Bga Ic Pin Map
8. BGA IC PIN MAP < Bottom view > Used Unused U201 (MSM6245 EUSY0318401 ) U201 (MSM6245 - EUSY0318401) Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 145 - Only for training and service purposes...
Page 145 8. BGA IC PIN MAP Used Unused U301 (TY9000A800KOGG - EUSY0336902) LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. - 146 - Only for training and service purposes...
Page 149 - No registration ( fail to attach network ) - weak Rx sensitivity - weak Tx Power even max power LGE Internal Use Only - 150 - Copyright © 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 154: Calibration & Rf Auto Test Program (Hot Kimchi)
Diag_NV6250_RevB.dll Diag_NV6275.dll Diag_NV.dll DLL_E5515CD.DLL DLL_PwrControlD.dll Dll_SerialATD.dll LG_CL_011.dll PwrSupply_Cmd.xml U370 Debug Auto U370 CalAuto U370 : Directory : File Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 155 - Only for training and service purposes...
Page 155 SBCmd.xml ShieldBox_DllD.dll Model U370 LG_RfTest_E5515C_211.dll AutoSetup_110.xml QMSL_MSVC6R.dll Cal_Setup_Test.xml Ezlooks.xml LG_RfCal_Q3G6280N_Polar_006.dll Procedure_U370_103.xml script_auto_001.xml : Directory script_cal_003.xml : File Spec_3GPP_030.xml LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. - 156 - Only for training and service purposes...
Page 156 Result Auto U370 U370 CalAuto U370 image result.bmp LG_UI_Ad6500_002.dll LG_UI_EmU370_001.dll : Directory LG_UI_Qu6250_003.dll : File LG_UI_Qu6275_004.dll _New_HK_0808.reg Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 157 - Only for training and service purposes...
Page 157: How To Use Hot Kimchi
3. Select “LOGIC MODE” that you want - Logic Mode -> 1: Calibration Only 2: Auto Test Only 3: Calibration + Auto LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. - 158 - Only for training and service purposes...
Page 158 10. Calibration & RF Auto Test Program (Hot Kimchi) U370 Click "Start" Select "U370" * Procedure 4. Select the model name “U370” 5. Click “Start” button Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 159 - Only for training and service purposes...
Page 160: Exploded View & Replacement Part List
15 16 37 38 39 42 43 44 30 31 18 19 20 21 22 23 24 51 52 Copyright © 2007 LG Electronics. Inc. All right reserved. - 161 - LGE Internal Use Only Only for training and service purposes...
Page 162: Replacement Parts
; ,BLACK , , , Black ACGK00 COVER ASSY,FRONT ACGK0093701 Black MBIB00 BUSHING,HINGE MBIB0005801 CASTING, STS, , , , , Black Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 163 - Only for training and service purposes...
Page 163 MOLD, Urethane Rubber S190A, , , , , Black 63,P MLAK00 LABEL,MODEL MLAK0018616 KG110 MADE IN KOREA Without Color 66,R LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. - 164 - Only for training and service purposes...
Page 164: Main Component
47 Kohm,1/16W ,J ,1005 ,R/TP SPCY00 PCB,FLEXIBLE SPCY0109101 POLYI ,0.5 mm,MULTI-5 ,U370 LCD FPCB ,; , , , , , , , , , SJMY00 VIBRATOR,MOTOR SJMY0008406 3 V,80 mA,10*2.7 ,17mm ,; ,3V , , ,12000 , , , ,31...
Page 165 ECCH0000115 22 pF,50V,J,NP0,TC,1005,R/TP C145 CAP,CERAMIC,CHIP ECCH0000115 22 pF,50V,J,NP0,TC,1005,R/TP C146 CAP,CHIP,MAKER ECZH0000813 100 pF,50V ,J ,NP0 ,TC ,1005 ,R/TP LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. - 166 - Only for training and service purposes...
Page 166 ECCH0000182 0.1 uF,10V ,K ,X5R ,HD ,1005 ,R/TP C212 CAP,CHIP,MAKER ECZH0003103 0.1 uF,10V ,K ,X7R ,HD ,1005 ,R/TP Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 167 - Only for training and service purposes...
Page 167 ECZH0003103 0.1 uF,10V ,K ,X7R ,HD ,1005 ,R/TP C306 CAP,CHIP,MAKER ECZH0003103 0.1 uF,10V ,K ,X7R ,HD ,1005 ,R/TP LGE Internal Use Only Copyright © 2007 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 C343 CAP,CHIP,MAKER ECZH0003103 0.1 uF,10V ,K ,X7R ,HD ,1005 ,R/TP Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 169 - Only for training and service purposes...
Page 169 ENBY0021001 24 PIN,0.4 mm,ETC , ,H=2.5 BOARD CONNECTOR,BOARD TO CN403 ENBY0036701 60 PIN,0.4 mm,ETC , ,H=1.0, Plug BOARD LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. - 170 - Only for training and service purposes...
Page 170 4.7 uH,M ,1 ,R/TP , ,; , ,0.3NH , , , , , ,NON SHIELD L301 INDUCTOR,SMD,POWER ELCP0008004 ,2.5X2X1MM ,11MM ,R/TP Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 171 - Only for training and service purposes...
Page 171 470 Kohm,1/16W ,J ,1005 ,R/TP R305 RES,CHIP,MAKER ERHZ0000203 10 Kohm,1/16W ,F ,1005 ,R/TP R306 RES,CHIP,MAKER ERHZ0000490 51 ohm,1/16W ,J ,1005 ,R/TP LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. - 172 - Only for training and service purposes...
Page 172 SON1612-6 ,6 PIN,R/TP ,2.8V, 150mA LDO WDFN ,8 PIN,R/TP ,2X2 1.5V/2.8V 300mA/300mA Dual U303 EUSY0346101 LDO ,; ,IC,LDO Voltage Regulator Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 173 - Only for training and service purposes...
Page 173 Blue ,1608 ,R/TP ,Blue SMD LED R316 RES,CHIP,MAKER ERHZ0000500 62 ohm,1/16W ,J ,1005 ,R/TP R317 RES,CHIP,MAKER ERHZ0000406 100 Kohm,1/16W ,J ,1005 ,R/TP LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. - 174 - Only for training and service purposes...
Page 174 ERHY0003301 100 ohm,1/16W ,J ,1005 ,R/TP R426 RES,CHIP ERHY0003301 100 ohm,1/16W ,J ,1005 ,R/TP FR-4 ,0.8 mm,BUILD-UP 8 ,U370 MAIN PCB ,; , , , , , , , , SPFY00 PCB,MAIN SPFY0158901 U306 EUSY0129503 2x2 mm MLPD ,3 PIN,R/TP ,Hall Effect Switch, Pb Free...
Page 175 14 V,10% ,SMD , SAJD00 PCB ASSY,SUB,SMT TOP SAJD0021901 CONNECTOR,BOARD TO ENBY0019601 24 PIN,.4 mm,ETC , ,H=1.5, Header BOARD LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. - 176 - Only for training and service purposes...
Page 176 Remark SPJY00 PCB,SUB SPJY0046201 FR-4 ,0.8 mm,BUILD-UP 4 ,U370 SUB PCB ,; , , , , , , , , , Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 177 - Only for training and service purposes...
Page 177: Accessory
,85Vac~264Vac ,5.1V(+0.15V, -0.2V) ,700mA ,5060 , ,WALL 2P ,I/O CONNECTOR , APAY00 PACKAGE APAY0103101 U370 HIT Packing(P/Label66-Angle-9501) Without Color LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. - 178 - Only for training and service purposes...
Page 178 Note...
Page 179 Note...

LG U370 Service Manual

1 Introduction

2 Performance

3 Technical Brief

4 Trouble Shooting

5 Download

6 Block Diagram

7 Circuit Diagram

8 Bga IC Pin Map

9 Pcb Layout

10 Calibration & RF Auto Test Program (Hot Kimchi)

11 Exploded View & Replacement Part List

Quick Links

Troubleshooting

Related Manuals for LG U370

Summary of Contents for LG U370

Table of Contents