Page 1 Internal Use Only Service Manual LG-A258 Date: June, 2011 / Issue 1.0...
Page 2: Table Of Contents
4.8 LCD Trouble ..................87 4.9 Camera Trouble ................... 91 4.10 Speaker Trouble ................94 4.11 Earphone Trouble ................97 LGE Internal Use Only - - Copyright © 011 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 4 • When returning system boards or parts like EEPROM to the factory, use the protective package as described. LGE Internal Use Only - 4 - Copyright © 011 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 5: Abbreviations
International Portable User Identity Intermediate Frequency Liquid Crystal Display Low Drop Output Light Emitting Diode OPLL Offset Phase Locked Loop LGE Internal Use Only - 5 - Copyright © 011 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 6 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 - 6 - Copyright © 011 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 7: Performance
EAR Phone Jack 5PIN I/O PC Synchronization Speech coding EFR/FR/HR/AMR Data and Fax Vibrator Loud Speaker Voice Recoding Microphone LGE Internal Use Only - 7 - Copyright © 011 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 8 Travel Adapter MIDI SW MIDI (Mono SPK) Camera 1.3M Bluetooth / FM Radio Bluetooth version 2.1 / 76~108MHz supported LGE Internal Use Only - 8 - Copyright © 011 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 9: Technical Specification
Power Toler. 30dBm 14dBm 28dBm 12dBm 26dBm 10dBm 24dBm 8dBm 22dBm 6dBm 20dBm 4dBm 18dBm 2dBm 16dBm 0dBm LGE Internal Use Only - 9 - Copyright © 011 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 10 3,000~ <6,000 6,000 GSM850/EGSM Offset from Carrier (kHz). Max. dBm Output RF Spectrum (due to switching transient) 1,200 1,800 LGE Internal Use Only - 10 - Copyright © 011 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 11 3 dB 14 3 dB Frequency (Hz) Max.(dB) Min.(dB) 1,000 Sending Response 2,000 3,000 3,400 4,000 4 3 dB LGE Internal Use Only - 11 - Copyright © 011 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 12 At least 58 dB SPL under below conditions: Ringer Volume 1. Ringer set as ringer. 2. Test distance set as 100 cm LGE Internal Use Only - 1 - Copyright © 011 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 13 Battery full charge voltage = 4.2 V Capacity: 900mAh Switching-mode charger Travel Charger Input: 100 ~ 240V, 50/60 Hz Output: 5.1V, 400 mA LGE Internal Use Only - 13 - Copyright © 011 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 14: Technical Brief
3.1 LG-A258 Functional Block Diagram The functional component arrangement is mentioned below diagram. Figure. 3.1.1 LG-A258 Functional Block Diagram LGE Internal Use Only - 14 - Copyright © 011 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 15: Digital Main Processor (Pmb8815, U00)
0 . 15 5 % ZXTP 25020 for example Battery Charger Figure. 3.2.1 X-Gold 215 Hardware Block Diagram LGE Internal Use Only - 15 - Copyright © 011 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 16 – GEA-1/2/3 • Security: – OMTP TR0 – Secure Boot – RSA(ROM)/SHA-1(HW accel.) – OCDS disabling – Certificate Management LGE Internal Use Only - 16 - Copyright © 011 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 17: External Memory
• Stereo Headset (Amplifier integrated) • 3 external analog measurement PIN’s • Bluetooth, A-GPS, WLAN support (I2C, I2S, SPI) LGE Internal Use Only - 17 - Copyright © 011 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 18: Power Management
• USB battery charging – USB charging spec 1.0 compliant • Backlight – Up to 4 serial white LEDs (integrated LDO) LGE Internal Use Only - 18 - Copyright © 011 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 19 – 64 voices MIDI, SP-MIDI – FM synthesizer • AMR-WB • True ring tones (MP3) • MP3, eAAC+ • G.722 SB-ADPCM encoding/decoding LGE Internal Use Only - 19 - Copyright © 011 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 20 1.8V memory is used. The efficiency of the DC/DC converter is optimized for an average load current of 100mA. That is the load current estimated for the GSM talk mode. LGE Internal Use Only - 0 - Copyright © 011 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 21 • The mixed signal module has some LDO’s for the audio driver and microphone supply • The FM receiver has an internal LDO for sensitive RF circuits. LGE Internal Use Only - 1 - Copyright © 011 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 23 VCXO_enable signal. The reason for the startup is stored in the ResetSourceRead register. Battery Measurement LGE Internal Use Only - 3 - Copyright © 011 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 24 If the charger unit is running the ADC is controlled by the charger state-machine Figure.3.3.2 First Part of the State Machine, Running in Different Power Domains than the Second Part LGE Internal Use Only - 4 - Copyright © 011 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 25 3. TECHNICAL BRIEF Figure 3.3.3 Second (Main) Part of the Startup State Machine in the VPMU Domain LGE Internal Use Only - 5 - Copyright © 011 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 26 HPBG on state and the system starts. This state change is indicated to the charger state-machine to enable the charger watchdog for safety LGE Internal Use Only - 6 - Copyright © 011 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 27 LCORE core regulator and wait for the core to reach reset state before powering up the I/O supply regulators. LGE Internal Use Only - 7 - Copyright © 011 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 28 3. TECHNICAL BRIEF Figure 3.3.4 Start Up Sequence (triggered by First Connect Event) LGE Internal Use Only - 8 - Copyright © 011 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 29 In testmode signal reset_pmu_n_o is high, that means the chip reset is fully controlled from external LGE Internal Use Only - 9 - Copyright © 011 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 30 PMU state-machine is high, vcxo_enable controls the rf_sysclk_en signal to the RF. If rf_sysclk_en_pmu is low, the DXCO is switched off, independent from vcxo_enable. LGE Internal Use Only - 30 - Copyright © 011 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 31 10 MHz. This oscillator is running during charging and during battery measurements triggered by the PMU. It is off otherwise. LGE Internal Use Only - 31 - Copyright © 011 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 32 Before switching OFF the software shall have enabled the 32 kHz oscillator and has switched the PMU clock to the 32 kHz clock to archive the target OFF current LGE Internal Use Only - 3 - Copyright © 011 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 33: Fem With Integrated Power Amplifier Module
Switch die and passive components are mounted on a multi-layer laminate substrate. The assembly is encapsulated with plastic overmold. LGE Internal Use Only - 33 - Copyright © 011 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 34 Switch die and passive components are mounted on a multi-layer laminate substrate. The assembly is encapsulated with plastic overmold. LGE Internal Use Only - 34 - Copyright © 011 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 35 RF_VLOGIC RF_TX_EN Stanby HIGH HIGH HIGH TX_LB HIGH HIGH TX_HB HIGH HIGH HIGH Figure 3.4.2 FEM CIRCUIT DIAGRAM LGE Internal Use Only - 35 - Copyright © 011 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 36: Crystal(6 Mhz, X100)
The reference clock can also be applied to external components like Bluetooth or GPS, via two independently controllable FSYS output pins. LGE Internal Use Only - 36 - Copyright © 011 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 37: Rf Subsystem Of Pmb8815 (U101)
The system can be configured to support one low band, GSM850 or EGSM900, and one high band, DCS1800 or PCS1900. A block diagram of the RF subsystem is given in Figure 3-6-1. LGE Internal Use Only - 37 - Copyright © 011 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 38 DC offset removal and programmable gain control. 850/900 RX1X RXTXDA DigRF RXTXEN 1800/1900 RXX LNA_GAIN RXBBFG[:0] DGAIN[5:0] Figure. 3.6.2 RECEIVER CHAIN BLOCK DIAGRAM LGE Internal Use Only - 38 - Copyright © 011 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 39 2.5 V supply voltage for the remaining circuits. This voltage is also used to generate a clean 1.4 V supply voltage via an additional LDO. LGE Internal Use Only - 39 - Copyright © 011 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 40: Memory
3. TECHNICAL BRIEF 3.7 MEMORY LG-A250 is composed of 1 memory. 1Gbit NAND & 512Mbit DDR SDRAM employed on LG-A250. LG-A58 LG-A58. 3.7.1 Memory (H8BCS0QG0MMR-46M, U100) 1V8_VDD C100 2.2u C103 0.1u U100 C120 0.1u AD00 VDD1 AD01 VDD2 C123 0.1u...
Page 41 - Random access : 25us (max.) - Sequential access : 45ns (min.) -Page program time : 200us (typ.) LGE Internal Use Only - 41 - Copyright © 011 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 42 Data read out after copy back read is allowed. This device includes also extra features like OTP/Unique ID area, Read ID2 extension. LGE Internal Use Only - 4 - Copyright © 011 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 43 - Programmable burst length 2 / 4 / 8 with both sequential Bidirectional data strobe (DQS) and interleave mode Input data mask signal (DQM) LGE Internal Use Only - 43 - Copyright © 011 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 47: Sim Card Interface
This signal makes SIM card to HW default status. SIM_CLK SIM card reference clock. SIM1_DATA This signal is interface datum. LGE Internal Use Only - 47 - Copyright © 011 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 48: Lcd Interface
- Backlight: 3 White LED(1 way) - Standby, Still, Moving mode display - Low power consumption driving - Mobile Phone Application LGE Internal Use Only - 48 - Copyright © 011 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 49: Vibrator Interface
Figure 3.11.1 Vibrator Driver Block Diagram R127 0 L101 F_VIB_P VIB_P C147 C144 Figure 3.11.2 Vibrator Driver Block LGE Internal Use Only - 49 - Copyright © 011 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 50: Mini Abb Interface
LEDs is 3.3V, the input voltage should be higher than 3.4V to provide enough voltage headroom for maintaining constant brightness. LGE Internal Use Only - 50 - Copyright © 011 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 51 The RT8966 is capable of being powered up from AC adapter and USB (Universal Serial Bus) port inputs. Moreover, the RT8966 includes a linear regulator (LDO 4.9V, 50mA) for supplying low power external circuitry. LGE Internal Use Only - 51 - Copyright © 011 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 52 The following table shows the switch status versus VBUS level. Table 3.12.1. RT8966GQW SWITCH DETECTION TABLE LGE Internal Use Only - 5 - Copyright © 011 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 53: Keypad Interface
(or key combination) that was pressed and how long it was pressed. LGE Internal Use Only - 53 - Copyright © 011 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 54 • Rescan (0 to 100 ms, 10 ms resolution) to determine that pressed key(s) still the same. LGE Internal Use Only - 54 - Copyright © 011 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 55: Audio Front-End
• Analog part The following figure shows an architecture overview of the Audio section. Figure 3.14.1 Audio Section Overview LGE Internal Use Only - 55 - Copyright © 011 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 56 100% by Firmware. • The high-pass functions of the voiceband filters have to be implemented in firmware on TEAKLite®. LGE Internal Use Only - 56 - Copyright © 011 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 57 Loudspeaker driver, b) one mono, differential Earpiece driver and c) one stereo, single-ended (with uni- or bipolar signals), Headset driver. LGE Internal Use Only - 57 - Copyright © 011 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 58 The buffers are designed to be short circuit protected. Figure 3.14.3 Switching for R/L DACs onto Buffers LGE Internal Use Only - 58 - Copyright © 011 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 59 To improve SNR the sample frequency can be doubled in dedicated modes and the modulated data stream is 4MHz instead of 2 MHz. LGE Internal Use Only - 59 - Copyright © 011 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 60 In case of an digital microphone VMIC can be used for supplying this microphone. Figure 3.14.5 Typical Microphone Supply Generation (alternative) LGE Internal Use Only - 60 - Copyright © 011 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 61: Camera Interface
Programming is done by register read/write transactions using an AHB slave interface. Figure 3.15.1 Block Diagram of Camera Interface LGE Internal Use Only - 61 - Copyright © 011 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 62 • Color processing (contrast, saturation, brightness, hue) • Power management by software controlled clock disabling of currently not needed sub-modules LGE Internal Use Only - 6 - Copyright © 011 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 63: Key Baclklight Led Interface
LD200 LD201 VA205 VA206 R208 1.2K Q200 KEY_BL_EN VA208 C215 R210 0.1u 100K Figure 3.16.1 Key Backlight Block LGE Internal Use Only - 63 - Copyright © 011 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 64: 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 - 64 - Copyright © 011 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 65: Rf Component
U100 (PMB8815) Main Chip (AGR+NAND) MEMORY(1G NAND + 512M) U100 H8BCS0QG0MMR-46M X100 Crystal, 26MHz Clock U300 Bluetooth (BCM2070, 0.4pitch) LGE Internal Use Only - 65 - Copyright © 011 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 66: Rx Trouble
Check Crystal Circuit Check Mobile SW , TX module And Rx Circuit Re-download SW and Do calibration again LGE Internal Use Only - 66 - Copyright © 011 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 67 26 MHz O.K? Crystal is OK. See next page to check Mobile SW , TX module and Rx Circuit LGE Internal Use Only - 67 - Copyright © 011 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 68 DPLUS 26MHz USB_DM DMINUS 1 Pin Figure 4.3.2 SIM 1 crystal circuit WAVEFORM Figure 4.3.3 26MHz output waveform LGE Internal Use Only - 68 - Copyright © 011 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 69 4. TROUBLE SHOOTING 4.3.2 Checking Mobile SW & FEM TEST POINT Figure 4.3.4 SIM 2 Mobile SW & FEM LGE Internal Use Only - 69 - Copyright © 011 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 70 2.2u Figure 4.3.5 SIM1 Mobile SW & FEM circuit CONTROL LOGIC Figure 4.3.6 TP4 ~ TP6 Control Logic LGE Internal Use Only - 70 - Copyright © 011 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 71 4. TROUBLE SHOOTING CHECKING FLOW Start Check TP1&TP4 ? Check PMB8815 Re-download SW and Do calibration again LGE Internal Use Only - 71 - Copyright © 011 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 72: Tx Trouble
Check Crystal Circuit Check Mobile SW , TX module And Tx Circuit Re-download SW and Do calibration again LGE Internal Use Only - 7 - Copyright © 011 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 73 26 MHz O.K? Crystal is OK. See next page to check Mobile SW , TX module and Rx Circuit LGE Internal Use Only - 73 - Copyright © 011 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 74 DPLUS 26MHz USB_DM DMINUS 1 Pin Figure 4.4.2 SIM 1 crystal circuit WAVEFORM Figure 4.4.3 26MHz output waveform LGE Internal Use Only - 74 - Copyright © 011 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 75 4.4.2 Checking Mobile SW & TX Module TEST POINT Figure 4.3.4 SIM 2 Mobile SW & TX Module LGE Internal Use Only - 75 - Copyright © 011 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 76 2.2u Figure 4.4.5 SIM1 Mobile SW & TX Module CONTROL LOGIC Figure 4.4.6 TP4 ~ TP6 Control Logic LGE Internal Use Only - 76 - Copyright © 011 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 77 4. TROUBLE SHOOTING CHECKING FLOW Start Check TP1&TP4 ? Check PMB8815 Re-download SW and Do calibration again LGE Internal Use Only - 77 - Copyright © 011 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 78: Power On Trouble
4.5 Power On Trouble VMMC(TP13) VCORE(TP4) VAUX(TP7) VPMU(TP11) VDDTRX(TP8) VDDXO(TP3) VDDVRF2(TP10) VDDMS (TP2) VDDTDC(TP9) VRF1(TP6) 1V8_VDD(TP5) VUSB(TP12) Figure 4.5.1 - 78 - LGE Internal Use Only Copyright © 011 LG Electronics. Inc. All right reserved. Only for training and service purposes Figure 4.5.1...
Page 79 (1%) R106 VBAT 5.6K C128 VRTC KB100 R125 PWRON R126 ZD100 100K Figure 4.5.3 power block of LG-A258 LGE Internal Use Only - 79 - Copyright © 011 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 80 Is the phone power on? Re-download software Does it work properly? The phone will Replace the main board Properly operating. LGE Internal Use Only - 80 - Copyright © 011 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 81: Charging Trouble
4. TROUBLE SHOOTING 4.6 Charging Trouble TEST POINT VBUS (TP2) U202 VBAT (TP1) Figure 4.6.1 LGE Internal Use Only - 81 - Copyright © 011 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 82 C247 0.1u HS_MIC_P C246 C248 0.1u HS_MIC_N C249 C250 C251 C252 1V8_VDD I2C_SCL I2C_SDA R242 MINI_ABB_INT_N Figure 4.6.2 LGE Internal Use Only - 8 - Copyright © 011 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 83 Is the voltage U202 at TP2= 4.2V Replace the main board Battery is charged? Charging is properly operating LGE Internal Use Only - 83 - Copyright © 011 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 84: Vibrator Trouble
4. TROUBLE SHOOTING 4.7 Vibrator Trouble TEST POINT Figure 4.7.1 LGE Internal Use Only - 84 - Copyright © 011 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 85 4. TROUBLE SHOOTING CIRCUIT VDDP_DIG1 VDDP_DIG1 R127 0 L101 F_VIB_P VIB_P C147 C144 Figure 4.7.2 LGE Internal Use Only - 85 - Copyright © 011 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 86 Is the voltage at TP1 high? Is the voltage at TP2 high? Vibrator Working well ! Replace the C147 LGE Internal Use Only - 86 - Copyright © 011 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 87: Lcd Trouble
NL_WR(TP5) F_LCD_DATA(TP4) NL_RS(TP6) NL_MAIN_CS(TP7) FL304 FL303 FL307 FL303 FL307 FL304 F_LCD_DATA(TP4) NL_WR(TP5) NL_RS(TP6) NL_MAIN_CS(TP7) CN300 CN102 Figure 4.8.1 LGE Internal Use Only - 87 - Copyright © 011 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 88 SUB_LCD_nCS NL_SUB_CS INOUT_B1 INOUT_A1 LCD_nWR NL_WR INOUT_B2 INOUT_A2 LCD_nRS NL_RS INOUT_B3 INOUT_A3 LCD_nCS NL_MAIN_CS INOUT_B4 INOUT_A4 Figure 4.8.2 LGE Internal Use Only - 88 - Copyright © 011 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 89 4. TROUBLE SHOOTING Waveform Graph 4.8.1. LCD Backlight Control Signal Waveform LCD_RS LCD_CS LCD_WR Graph 4.8.2. LCD Data Waveform LGE Internal Use Only - 89 - Copyright © 011 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 90 Replace FPCB Data pins on CN102 ? Does LCD work Replace LCD module properly ? LCD working well ! LGE Internal Use Only - 90 - Copyright © 011 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 91: Camera Trouble
4. TROUBLE SHOOTING 4.9 Camera Trouble TEST POINT Camera Module Figure 4.9.1 LGE Internal Use Only - 91 - Copyright © 011 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 92 I2C_SDA MLED2 I2C_SCL CAM_RESET MLED3 C341 C339 C340 C343 C344 C342 C345 2.2u 0.1u 0.1u 0.022uF Figure 4.9.2 LGE Internal Use Only - 9 - Copyright © 011 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 93 4. TROUBLE SHOOTING CHECKING FLOW START Does Camera work Replace Camera module properly ? Camera working well ! LGE Internal Use Only - 93 - Copyright © 011 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 94: Speaker Trouble
4. TROUBLE SHOOTING 4.10 Speaker Trouble TEST POINT Figure 4.10.1 LGE Internal Use Only - 94 - Copyright © 011 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 95 LCD_ID NL_MAIN_CS IF_MODE LCD_RESET_N LCD_VSYNC LCD_RD F_VIB_P F_VIB_N MLED1 I2C_SDA MLED2 I2C_SCL CAM_RESET MLED3 ENBY0042601 GB042-54P-H10 Figure 4.10.3 LGE Internal Use Only - 95 - Copyright © 011 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 96 Check the Audio signal TP1, TP2 Replace Spk (audio sub system output) Is it ok? Speaker Working well!! When playing sound LGE Internal Use Only - 96 - Copyright © 011 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 97: Earphone Trouble
4. TROUBLE SHOOTING 4.11 Earphone Trouble TEST POINT U202 U200 TP1 TP3 TP2 TP4 U101 Figure 4.11.1 LGE Internal Use Only - 97 - Copyright © 011 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 98 C247 0.1u HS_MIC_P C246 C248 0.1u HS_MIC_N C249 C250 C251 C252 1V8_VDD I2C_SCL I2C_SDA R242 MINI_ABB_INT_N Figure 4.11.2 LGE Internal Use Only - 98 - Copyright © 011 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 99 C254 TP10 270n MUIC_IO_M TP11 MUIC_IO_P MUIC_ID C256 R243 EAR_GND C257 0.47uF Close to uUSB Conn Figure 4.11.3 LGE Internal Use Only - 99 - Copyright © 011 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 100 Replace CN203 is it ok? Redownload SW Or change U202 Earphone will work properly When playing sound file. LGE Internal Use Only - 100 - Copyright © 011 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 101 Redownload SW Check the Or change U200 Audio signal TP9. is it ok? Earphone will work properly (Acoustic Path) LGE Internal Use Only - 101 - Copyright © 011 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 102: Micro Sd Trouble
MICROSD_DATA1 DAT1 DAT0 MICROSD_DATA0 CARD_DETECT MICROSD_DET_N R241 MICROSD_CLK MICROSD_CMD CD_DAT3 MICROSD_DATA3 DAT2 MICROSD_DATA2 VA221 C255 Figure 4.16.2 4.12.2 LGE Internal Use Only - 10 - Copyright © 011 LG Electronics. Inc. All right reserved. 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 - 103 - Copyright © 011 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 104: Bluetooth Trouble
UART_RTS_N BT_UART_CTS GPIO_0 UART_CTS_N BT_WAKEUP BT_UART_RTS GPIO_6 GPIO_1 HUSB_DN BT_WAKEUP_HOST GPIO_5 HUSB_DP FSYS_EN Figure 4.17.2 Bluetooth circuit 4.13.2 LGE Internal Use Only - 104 - Copyright © 011 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 105 Check U101 circuit (BY_CLK32K) Check TP4 Check U101 circuit (BT_26M_CLK) U101 (PMB8815) : Main Chip (A-GOLDRADIO) Replace U303 LGE Internal Use Only - 105 - Copyright © 011 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 106: Fm Radio Trouble
4. TROUBLE SHOOTING 4.14 FM Radio Trouble TEST POINT CN401 FM LNA Filter Circuit Figure 4.14.1 FM Radio test point LGE Internal Use Only - 106 - Copyright © 011 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 107 D205 L200 C254 MUIC_IO_M 270n MUIC_IO_P MUIC_ID C256 R243 EAR_GND C257 0.47uF Close to uUSB Conn Figure 4.18.2 LGE Internal Use Only - 107 - Copyright © 011 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 108 Check condition of FM LNA(Q301) Replace the FM LNA, Is the condition good? Q301 Check U101 Circuit (VDD_FMR) LGE Internal Use Only - 108 - Copyright © 011 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 118 5. DOWNLOAD LG-A58 ‘LG-A58’ LG-A58 LG-A58 LG-A58 LG-A58 LG-A58 ‘LG-A58’ LG-A58 LGE Internal Use Only - 118 - Copyright © 011 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 122: Block Diagram
6. BLOCK DIAGRAM 6. BLOCK DIAGRAM HORNET Block Diagram LGE Internal Use Only - 1 - Copyright © 011 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 123: Circuit Diagram
C145 C146 LMMC 2.85V 150mA LPMU 1.2V 15mA LRTC 2.3V LUSB 3.1V 40mA LUSB 1.8V / 2.85V 30mA LGE Internal Use Only - 123 - Copyright © 2011 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 124 MUIC_ID MICROSD_DATA2 DAT2 VA221 C255 I2C_SCL C256 I2C_SDA R243 EAR_GND C257 R242 0.47uF MINI_ABB_INT_N Close to uUSB Conn LGE Internal Use Only - 124 - Copyright © 2011 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 125 F_CAM_DATA7 INOUT_B3 INOUT_A3 LCD_nCS INOUT_B4 INOUT_A4 NL_MAIN_CS C341 C339 C340 C342 C343 C344 C345 2.2u 0.1u 0.1u 0.022uF LGE Internal Use Only - 125 - Copyright © 2011 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 126 F_CAM_DATA1 F_LCD_DATA01 MLED1 F_LCD_DATA00 F_CAM_DATA0 MLED2 RCV_SPK_NOUT MLED3 RCV_SPK_POUT F_CAM_PCLK F_VIB_N CAM_RESET F_VIB_P CAM_STANDBY ENBY0051301 14-5804-040-000-829+ GB042-24S-H10-E3000 ENBY0034201 LGE Internal Use Only - 126 - Copyright © 2011 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 127 7. CIRCUIT DIAGRAM VOLUME SIDEKEY 2010.01.20 updated CN101 KPD_SENSE[2] KPD_DRV[0] KPD_DRV[1] KPD_SENSE[2] KB101 KPD_DRV[0] KB102 SEND KPD_DRV[1] TP101 LGE Internal Use Only - 127 - Copyright © 2011 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 128: Bga Pin Map
BGA IC pin check (U101) - SIM Ball Diagram (Top View), PMB8815(A-GOLDRADIO+) : not in use : not in use LGE Internal Use Only - 18 - Copyright © 011 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 129 BGA IC pin check (U100) – DDR SDRAM SDRAM Ball Diagram (Top View), H8BCS0QG0MMR : not in use LGE Internal Use Only - 19 - Copyright © 011 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 130: Pcb Layout
KB218 KB208 KB203 KB201 KB100 KB205 KB207 KB206 KB210 KB212 KB211 KB215 KB217 KB216 KB219 KB221 KB220 LG-A258_MAIN_EAX64107601_1.0_TOP LGE Internal Use Only - 130 - Copyright © 2011 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 131 - TX Low power - Not good BER MIC200 : MIC - No Service - no MIC Operation LG-A258_MAIN_EAX64107601_1.0_BOT LGE Internal Use Only - 131 - Copyright © 2011 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 132: Stand Alone Test
1. Set COM Port 2. Check PC Baud Rate 3. Confirm EEPROM & Delta file prefix name, and then click “OK”. LGE Internal Use Only - 13 - Copyright © 011 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 133 5. For the purpose of the Standalone Test, Change the Phone to “ptest mode” and then Click the “Reset” bar. 6. Select “Non signaling” in the Quick Bar menu. Then Standalone Test setup is finished. LGE Internal Use Only - 133 - Copyright © 011 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 134: Tx Test
3. Put the number of “PCL” in the PA Level menu. 4. Finally, Click “Write All” bar and try the efficiency test of Phone. LGE Internal Use Only - 134 - Copyright © 011 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 135: Rx Test
4. The Phone must be changed “normal mode” after finishing Test. Change the Phone to “normal mode” and then Click the “Reset” bar. LGE Internal Use Only - 135 - Copyright © 011 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 136: Auto Calibration
GSM phone. 11.2 Directory structure of Tachyon “C LGE Tachyon” LGE Internal Use Only - 136 - Copyright © 011 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 137: Description Of Folder & File
-. Model_CallSetuo.xml : stored equipment setting data for auto test. -. Model_NV.ini : default NV data. -. Model_Sequence.xml : stored calibration and auto test procedure. LGE Internal Use Only - 137 - Copyright © 011 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 138: Procedure
11.AUTO CALIBRATION 11.4 Procedure 1. Execute “/LGE/Tachyon/Tachyon.Exe” and Click Login button. 2. Tachyon execute ready display LGE Internal Use Only - 138 - Copyright © 011 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 139: Tachyon Main Ui
11. Voltage / Current Setting 12. Show Result 11.5.2 Command button Only support Calibration Test and Stop button. LGE Internal Use Only - 139 - Copyright © 011 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 140: Agc
Channel PCS 1900 Frequency 1850.2 MHz 1880 MHz 1909.8 MHz Max power 29.5 dBm 29.5 dBm 29.5 dBm LGE Internal Use Only - 140 - Copyright © 011 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 141: Exploded View & Replacement Part List
Can Assembly,Shield SUMY00 Microphone,Condenser ADB00 Dome Assembly,Metal EAX00 PCB,Sidekey GMEY01 Screw,Machine EAA00 EAC00 Rechargeable Battery,Lithium Ion MCK00 Cover,Battery LGE Internal Use Only - 141 - Copyright © 2011 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 142: Replacement Parts
COMPLEX LGA250.ABRATS ZZ:Without Color MJN061100 Tape, Protect MJN67771901 UPPER COMPLEX LGA250.ABRATS ZZ:Without Color MCQ015701 Damper, Connector MCQ66570101 CAMERA LGE Internal Use Only - 14 - Copyright © 011 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 143 SJMY00 Motor, DC SJMY0007109 10*3.0, 17mm WOOSUNG G&T CO., LTD Window Assembly, AJX00 AJX73225101 LGA250.ABRATS ZZ:Without Color - LGE Internal Use Only - 143 - Copyright © 011 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 144 Tape MJN67881701 COMPLEX LGA250.AFRATS ZZ:Without Color - MOLD PC LUPOY SC-1004A LGA250.ABRATS MBG01 Button MBG64206301 ZZ:Without Color - LGE Internal Use Only - 144 - Copyright © 011 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 145 EAA00 PIFA Antenna, RF EAA62609401 Type - KOMATECH CO., LTD PCB Assembly, EBR01 EBR73094108 LGA258.ACISTS 1.0 Main Main LGE Internal Use Only - 145 - Copyright © 011 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 146 LGA258.ACISTS ZZ:Without Color LG-A258 AGF000000 Package Assembly AGF76259401 CIS(EU1/CIS_UB/CIS_LB_China/720EA) COMPLEX GD510.ACZESV ZZ:Without Color EU1 MAY047100 Box, Master MBEE0061001 Master Box LGE Internal Use Only - 146 - Copyright © 011 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 147 Addition Assembly AAD85691108 LGA258.ACISTS TS:TITANIUM SILVER - MOLD PC LUPOY SC-1004A LGA250.ABRATS MCK00 Cover, Battery MCK66691101 ZY:Color Unfixed - LGE Internal Use Only - 147 - Copyright © 011 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 148: Main Component
C1005Y5V1C223ZT 22nF -20TO+80% 16V Y5V - Capacitor, Ceramic, C344 ECZH0001202 30TO+85C 1005 R/TP - TDK KOREA Chip COOPERATION LGE Internal Use Only - 148 - Copyright © 011 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 149 GRM188R60J106M 10000000 pF, 6.3V, M, X5R, TC, C127, Capacitor, Ceramic, ECCH0005604 1608, R/TP, 0.8 mm MURATA MANUFACTURING C221 Chip CO., LTD. LGE Internal Use Only - 149 - Copyright © 011 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 150 GRM155R60J105K 1uF 10% 6.3V X5R -55TO+85C C119, ECCH0004904 Chip 1005 R/TP - MURATA MANUFACTURING CO., LTD. C144, C347 LGE Internal Use Only - 150 - Copyright © 011 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 151 LL1005-FHL3N3S 3.3NH 0.3NH - 400mA 0.16OHM C300, Inductor, Multilayer, ELCH0001405 9.1GHZ 8 SHIELD NONE 1.0X0.5X0.5MM R/TP C307 Chip TOKO, INC. LGE Internal Use Only - 151 - Copyright © 011 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 152 1005 R/TP - ROHM Semiconductor KOREA C338 Chip CORPORATION MCR01MZP5J471 470OHM 5% 1/16W 1005 R/TP - R102 Resistor, Chip ERHZ0000484 ROHM. LGE Internal Use Only - 15 - Copyright © 011 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 153 HK1005 22NJ 22NH 5% - 300mA 0.6OHM 1.9GHZ 8 Inductor, Multilayer, L316 ELCH0005004 SHIELD NONE 1.0X0.5X0.5MM R/TP TAIYO YUDEN Chip CO., LTD LGE Internal Use Only - 153 - Copyright © 011 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 154 Inductor, Multilayer, LL1005-FHL68NJ 68NH 5% - 180mA 1.7OHM 1.3GHZ L101 ELCH0001431 Chip 10 SHIELD NONE 1.0X0.5X0.5MM R/TP TOKO, INC. LGE Internal Use Only - 154 - Copyright © 011 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 155 BLM15BB750SN1D 75 ohm 1.0X0.5X0.5 25% 0.4 ohm FB100 Filter, Bead SFBH0007103 0.3A SMD R/TP 2P 0 MURATA MANUFACTURING CO., LTD. LGE Internal Use Only - 155 - Copyright © 011 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 156 1005GC2T1N2SLF 1.2NH 0.3NH - 300mA 0.12OHM Inductor, Multilayer, L306 ELCH0004720 9GHZ 8 SHIELD NONE 1.0X0.5X0.5MM R/TP Chip PILKOR ELECTRONICS LTD. LGE Internal Use Only - 156 - Copyright © 011 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 157: 1.3 Accessory
COMPLEX LGA190.ACISBK ZZ:Without Color - Accessory, LG0029 LG0029 Micro USB, 0.8M ningbo broad EBX000000 SGDY0018001 Data Cable telecommunication co., ltd LGE Internal Use Only - 157 - Copyright © 011 LG Electronics. Inc. All right reserved. Only for training and service purposes...

LG -A258 Service Manual

1 Introduction

2 Performance

3 Technical Brief

4 Trouble Shooting

5 Download

6 Block Diagram

7 Circuit Diagram

8 Bga Pin Map

9 Pcb Layout

10 Stand Alone Test

11 Auto Calibration

12 Exploded View & Replacement Part List

Quick Links

Related Manuals for LG LG-A258

Summary of Contents for LG LG-A258

Table of Contents