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LG B1300 Service Manual
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LG B1300 Service Manual

LG B1300 Service Manual

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B1300
SERVICE MANUAL
SERVICE MANUAL

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Summary of Contents for LG B1300

  • Page 1 B1300 SERVICE MANUAL SERVICE MANUAL...

  • Page 2: Table Of Contents

    Table of Contents …………………… Chapter 1 - Performance 1-1. Performance ………………………………………….. 1-2. HW Feature …………………………………………… …………………… Chapter 2 – Technical Brief 2-1. The RF Chipset ……………………………………… 2-2. The PA Circuit ………………………………………. 2-3. Peripheral Circuit …………………………………… 2-4. Digital Baseband Chip ……………………………… 2-5.
  • Page 3 Table of Contents …………………… Chapter 5 – Test Point Data 5-1. Component Side(1-1) ………………………………. 5-2. Component Side(1-2) ………………………………. 5-3. Keypad Side(2-1) ……………………………………. …………………… Chapter 6 – Assembly Instructions 1. Remove Battery Cover ………………………………… 2. Remove Battery …………………………………………. 3. Remove Screws ………………………………………… 4.

  • Page 4: Chapter 1 - Performance

    Chapter 1. Performance 1-1 Performance Item Description Specification EGSM900 band Tx: 890 + n*0.2 MHz Rx: 935 + n*0.2 MHz (n = 0 ～ 124) Tx: 890 + (n-1024)*0.2 MHz Frequency Band Rx: 935 +(n-1024)*0.2 MHz (n = 975 ～ 1023) GSM1800 band Tx: 1710 + (n-512)*0.2 Rx: 1805 + (n-512)*0.2...
  • Page 5 Item Description Specification GSM1800 Control Level Power Level Tolerance 30 dBm ±2dB 28 dBm ±3dB 26 dBm ±3dB 24 dBm ±3dB 22 dBm ±3dB 20 dBm ±3dB 18 dBm ±3dB Power Level 16 dBm ±3dB 14 dBm ±3dB 12 dBm ±4dB 10 dBm ±4dB...
  • Page 6 Item Description Specification Max. GSM900 Offset from Carrier (KHz). 1200 1800 Spectrum due to switching transient GSM1800 Max. Offset from Carrier (KHz). 1200 1800 Conduction, Emission Status, Appendix 1 Spurious emissions Conduction, Emission Status, Appendix 2 GSM900 BER(Class II) <2.439% @-102dBm Bit Error Rate DCS1800 BER(Class II) <2.439% @-102dBm...
  • Page 7 Item Description Specification Frequency(Hz) Max.(dB) Min.(dB) 1,000 Receiving Response 3,000 3,400 4,000 * Mean that Adopt a straight line in between 300Hz& 1,000Hz to be Max. level in the range. STMR 13 +/- 5 dB Stability Margin > 6 dB dB to ARL (dB) Level Ratio (dB) 17.5...
  • Page 8 Item Description Specification Under conditions, at least 150 hours: 1.Brand new and full 720mAh battery 2.Full charge, keep GSM in idle mode 3.Broadcast set off. Standby time 4.Signal strength=-82dBm, DRX=9multiframes 5.Back light of phone set off, no press keypad At least 90dB under below conditions: Ringer Volume 1.
  • Page 9 Item Description Specification Linear Charger In put: 110V or 220 VAC, 50/60Hz Out put: 5VDC+/-0.25V, 500mA (No Load) Travel Charger Switching-mode charger In put: 96- 246VAC, 50/60Hz Out put: 5VDC+/-0.25V, 500mA (No Load) - 9 -...

  • Page 10: Hw Feature

    1-2 HW Feature Item Feature Comment Battery Li-Ion Battery, 720mAh GSM Imax(280mA),DCS Imax(220mA) AVG TCVR current (mA) Stand by current (mA) <=5mA - Talk time 3-hour (GSM Tx Level_7) - Stand by time TBD-hour(Paging Period:5 RSSI:-82dBm) - Charging time 2-hour RX sensitivity GSM:-107dBm, DCS:-105dBm GSM (Level 5:32dBm),...

  • Page 11: Chapter 2. Technical Brief

    Chapter 2. Technical Brief Circuit Description 2-1 The RF Chipset The B1300 RF integrates the TRF6150 transceiver IC, TX/RX VCO, Power amplifier (RF3110), Front End Module 8450T(switchplexer, RF-SAW filter), for dualband transmitting and receiving function. - 11 -...
  • Page 12 2-1-1 The Receiver The RF receive signal( EGSM 925Mhz – 960MHz, DCS 1805Mhz – 1880Mhz) is input via the antenna or coaxial connector. An antenna matching circuit is between the antenna and the connector. An t EGS M - Rx EGS M b a n d EGS M - Tx EGS M...
  • Page 13 The RF receive signal( EGSM 925Mhz – 960MHz, DCS 1805Mhz – 1880Mhz) is input via the antenna or coaxial connector. An antenna matching circuit is between the antenna and the connector. Module(FEM8450T) to switch either Rx or Tx path on. When the Rx path is turned on, the RF receive signal then feeds into two paths, EGSM Rx and DCS1800 Rx.
  • Page 14 DCS Band From AUX VCO= 2 x IF Frequency CH 512 CH 532 832 MHz CH 533 CH 549 837.2 MHz CH 550 CH 575 832 MHz CH 576 CH 597 858 MHz CH 598 CH 614 837.2 MHz CH 615 CH 662 858 MHz CH 663...

  • Page 15: The Pa Circuit

    The transmit signal is generated directly by a external TX/RX VCO (VON1885C28DKB). In the feedback path, the RF transmit signal is mixed with the off-chip main VCO to produce the desired TXIF (416 ~ 429Mhz). This TXIF signal from the feedback path is then compared to the TXIF signal from the IF modulator at the detector.

  • Page 16: Peripheral Circuit

    2-3 Peripheral Circuit Temperature Sensor When the chip is not transmitting or receiving, its temperature can be measured by sensing the voltage on the external resistor from pin 31 to ground. From –40 to +85 C, the resistor voltage varies linearly from 0.9V to 1.35V. Regulator and Serial Data Interface TRF6150 built in 3 voltage regulators to supply internal functions and external RF componen ts.
  • Page 17 System Block Diagram of Hercrom20 - 17 -...

  • Page 18: Analog Baseband Chip

    2-5 Analog Baseband Chip : Nausica_CS, TWL3012B The TWL3012B device includes a complete set of baseband functions that perform the interface and processing of the following, voice signals, the baseband in-phase (I) and the quadrature (Q) signals, which support both the single-slot and multislot modes. The TWL3012B device also includes associated auxiliary RF control features, supply voltage regulation, battery charging controls, and switch on/off system analysis.
  • Page 19 System Block Diagram of Nausica_CS - 19 -...

  • Page 20: Cpu Memories

    Peripheral 2-6 CPU Memories Flash ROM An 32Mbit programmable ROM which is capable of being written to while still in circuit. Contains all the main command software for the mobile. SRAM A 4MBit SRAM memory is embedded in the HERCROM20 which is used for ARM7 & DSP execution 2-7 Power Supplies There are six regulators in the Nausica_CS .
  • Page 21 Power supply - 21 -...

  • Page 22: Battery Charge Interface

    2-8 Battery Charge Interface The charging device is a dc voltage source of 7 V absolute maximum. An external PMOS power transistor in series with a power Schottky diode connected between VCHG and VCC3 of the TWL3012B device controls the current flow from the charging device to the main battery.
  • Page 23 Battery Charge Control Circuit - 23 -...

  • Page 24: System Connector

    2-9 System Connector This Connecter is for travel/desk charger, accessories connection and data access (trace, debug and Software Download). System Connector Specification Pin name Pin Description DSR / USC0 DSR ( GPIO32 ) ( DAI CLK /TCK) USC1 GSPa_ RX / DAIRX / TDI USC2 GSPa_TX / DAI TX /TDO USC4 / USC3...
  • Page 25 Please forget about pin 19 to 22 (External Battery Contact Pin) - 25 -...

  • Page 26: Keypad Switches And Scanning

    2-10 Keypad Switches and Scanning The key switches are metal domes which make contact between two concentric pads on the top layer of the PCB when pressed. There are 18 switches (S301-318), connected in a matrix of 5 rows by 4 columns, as shown in Figure, except for the power switch(S313) which is connected independently.

  • Page 27: Display Interface

    2-11 Display Interface Power to the LCD is supplied by VR2B of Nausica_CS. The LCD can be reseted by RES. A low on this output reset the LCD. There is also the control output CS which is also derived from Hercrom20, this acts as the chip select enable for the LCD module. Hercrom20 uses data line D0-D7 to send serial data for displaying graphical text onto the LCD.

  • Page 28: Microphone

    2-12 Microphone A microphone holder is mounted on PCB and is used to hold the microphone between frond cover and PCB. The audio signal is passed to the MICIN of Nausica_CS. The voltage supply MICBIAS is coming from Nausica_CS., and is a bias voltage for both the MICIP and AUDIO_ IN lines form system connector.

  • Page 29: Headset Interface

    2-14 Headset Interface The audio input of the headset is connected to AUXIN pin of Nausica_CS, the microphone is biased by MICBIAS pin form Nausica_CS, too. The audio out to the headset kit is fed with EARN pin of Nausica_CS, 2-15 Back-light Illumination In Back-Light illumination, there are 10 Blue LEDs (six for keys and four for the LCD), which are driven by BACKLIGH line from Hercrom20.

  • Page 30: Chapter 3. Failure List

    Chapter 3. Failure List FAILURE ITEM NO RING TONE RING TONE DISTORTION NO KEY TONE AUDIO NOISE POOR VOICE QUALITY LOW VOICE VOLUME RECEIVER / EARPIECE MUTE POOR HANDFREE VOICE QUILITY TOTALLY DEAD/NO POWER UNEXPECTED POWER ON UNEXPECTED POWER OFF/POWER OFF BY PLUG IN A EARPIECE RANDOM TIME DISPLAY CLOCK RESET AT POMER ON /CLOCK DEAD NO SERVE FOUND/NO NET WORK REGISTER...
  • Page 31 FAILURE ITEM BAD CHARGER CONNECTOR CAN'T POWER ON AFTER CHARGING SHORT WAITING HOURS HIGH POWER CONSUMATION BATTERY DAMAGE BATTERY CAN'T BE CHARGED BATTERY LEVEL DON'T DISPLAY BATTERY LEVEL DISPLAY NOT CORRECT INCOMPATIBLE WITH BATTERY SIM CARD UNRECOGNIZE BAD SIM CARD CONTACT UNEXPECTED SIM CARD LOCK HOUSING DAMAGE BAD KEYPAD RESPONSE...

  • Page 32: Chapter 4. Trouble Shooting

    Chapter 4. Trouble Shooting 4-1 Power Supply Failure a) Failure : - Problem with turning on mobile phone Solution: - Test the set’s current by using battery simulator: observe the value of current used - Case 1: C223~ C227 If the Current is higher than 300mA, please check C223~C227, if short circuit, Replace it - Case 2:...

  • Page 33: Software Download

    c) Failure : - The value of the charging current look like short circuit. Solution : - Re-install the software - Check Q101, if short circuit, replace it. Q101 4-2 Software Download Failure a) Failure : - Problem with software download Solution : - J104 may be bad connection or broken, check the connector.

  • Page 34: Voice Function

    4-3 Voice Function Failure a) Failure : -Microphone voice failure Solution : - Test the bias voltage on R301, it should R301 be 2.5V, - Replace Microphone, if bias voltage is fine. J104 b) Failure : -Speaker failure Solution : - Check speaker connector, it may be bad connection.

  • Page 35: Display Function

    4-4 Display Function Failure a) Failure : -No display on LCD Solution : -Test the resistance of C319~C327 by using multi-meter, the value should be infinity. Replace the capacitor, which has any impedance. - Test the resistance of R311~R313, if cold soldering, Please re-solder again.
  • Page 36 d) Failure : -No Back-light Solution : - Replace the LED that doesn’t light up including any failing parts of LED. - If all of the LED fails, Please check Q301, Q302 and related circuits. Q302 Q301 - 36 -...

  • Page 37: Chapter 5. Test Point Data

    Chapter 5. Test Point Data 5-1 Component Side (1-1) -37-...
  • Page 38 -38-...
  • Page 39 Loca- Component Side (1-1) tion J103 Battery connector : For damage or cold soldering cause power on failure U202 Nausica_CS : analog baseband chipset (ABB) U201 Hercrom20 : digital baseband chipset (DBB) U304 16Mbit flash ROM : For damage or cold soldering cause power on failure P-channel MOSFET with schottky diode : For damage or cold soldering Q101 Cause charger function failure...
  • Page 40 - 40 -...

  • Page 41: Component Side(1-2)

    5-2 Component Side (1-2) 27 28 -41-...
  • Page 42 -42-...
  • Page 43 Loca- Component Side (1-2) tion VR2B regulator (2.85V) : For damage or cold soldering cause power C223 supply for DBB & ABB peripheral failure. VR1B regulator (2V) : For damage or cold soldering cause power C224 supply for ABB internal logic failure VR3 regulator (2.85V) : For damage or cold soldering cause power C225 supply for ABB analog circuits failure...
  • Page 44 - 44 -...

  • Page 45: Keypad Side(2-1)

    5-3 Keypad Side (2-1) -45-...
  • Page 46 -46-...
  • Page 47 Loca- Keypad Side (2-1) tion LCM Connector : For damage or cold soldering cause LCD Display DS301 failure D301~ Back-Light LED : For damage or cold soldering cause back-light LED D312 failure S301~ Keypad Switches : For damage or shirt circuit cause keypad function S317 failure B201...

  • Page 48: Chapter 6. Assembly Instructions

    Chapter 6. Assembly Instructions 1. Remove Battery Cover 2. Remove Battery - 48 -...

  • Page 49: Remove Screws

    3. Remove Screws There are 4 screws in total 4. Turn Handset Up 5. Take off Front Panel - 49 -...

  • Page 50: Take Off Keypad & Metal-Dome

    6. Take off Keypad & Metal-Dome 7. Take off Mainboard - 50 -...

  • Page 51: Take Off Battery Connecter & Mic & Vibrator

    8. Take off Battery Connecter & MIC & Vibrator Battery Connecter Vibrator 9. Turn Mainboard Down - 51 -...

  • Page 52: Take Off Antenna

    10. Take off Antenna 11. Take off Shielding Cover - 52 -...

  • Page 53: Chapter 7. Block Diagram

    Chapter 7. Block Diagram 1. RF Section - 53 -...

  • Page 54: Baseband Section

    2. Baseband Section Flash SRAM Keypad ARM 7 Vibrator HERCROM 20 Backlight C54X RF Interface System Connector Codec Microphone Nausica_CS Battery Speaker Charger - 54 -...

  • Page 55: Chapter 8. Circuit Diagram

    Chapter 8. Circuit Diagram Top Schematic Baseband Top Schematic Baseband Baseband Chip-set Peripheral Clara RF Baseband Top Schematic DATA DATA /RESET_RF /RESET_RF TX_ON TX_ON TXVCO_ON TXVCO_ON RADIO_TEMP RADIO_TEMP /PA_ON900 /PA_ON900 /PA_ON1800 /PA_ON1800 PA_LEVEL PA_LEVEL 13MHZ 13MHZ TCXOEN TCXOEN TCXOBUFEN TCXOBUFEN VR2B VR2B VBAT...
  • Page 56 R102 DATA C104 100n16V /RESET_RF TX_ON TXVCO_ON RADIO_TEMP /PA_ON900 /PA_ON1800 PA_LEVEL 13MHZ TCXOEN TCXOBUFEN VR2B VR2B VBAT VBAT C103 C102 200 Baseband Chip-set 1u/16V Q101 Si4833DY ICTL TP101 TP102 VR2B R109A MNR04-10k R109B MNR04-10k R109C MNR04-10k R109D MNR04-10k J104 R115 VBAT_2 R104A MNR04-47R...
  • Page 57 BaseBand supply overview : Lite-On Technology Corp. ------------------------------------------------------- (1.8V) Digital core & RTC Permanent Title VR1B 2.0V Nova internal logic ON/OFF B1300 Baseband Chipset 2.0/2.9V Memory devices Permanent Size Document Number -57- VR2B 2.9V Nova & Samson peripherals Permanent <Doc>...
  • Page 58 100n G112064-23 RESET WP/ACC R315 10k C317 C318 RY/BY /BHE /BHE /BLE Am29LV160B /BLE /CS2 /CS2 /CS1 /CS1 /CS0 /CS0 Lite-On Technology Corp. /RESET_OUT /RESET_OUT Title B1300 Baseband Peripheral Size Document Number -58- <Doc> Date: Wednesday, January 22, 2003 Sheet...
  • Page 59 C643 C644 C641 C645 C648 C647 C646 TP601 TP604 TP602 TP603 Lite-On Technology Corp. RADIO_TEMP Title R632 B1300 Clara RF 0402-R-Short TO/FROM BASEBAND C639 R627 C640 Size Document Number -59- 9k76 1% 100n <Doc> Date: Monday, January 27, 2003 Sheet...
  • Page 60 -60-...

  • Page 61: Chapter 9. Tooling List

    Chapter 9. Tooling List Level 1 ITEM FUNCTION SPEC MAGANIFY(20 TIME ) Motic 20x~80 DOUBLE TAPY ( 3M) 8*22 mm TAPE CUTER MACHINE PINCES Pick up small part SCREW DRIVE Screwing HIOS CL3000 ELIMINATOR AIR GUN Clean lens 3M Model 908 LONG FIBER CLOTH Clean hand set 15*15 CM...
  • Page 62 Level 2 ITEM FUNCTION SPEC Buzzer/Mic Replace LED Replace Murcury Battery Replace SOLDER STATION Weller WES50 SOLDER WIRE Kester 0.6mm FLUX PASTE Fmkanc32-200 MAGANIFY(20 TIME) Motic 20x~80x DOUBLE TAPY (3M) 8*22 mm TAPE CUTER MACHINE PINCES Pick up small part SCREW DRIVE Screwing HIOS CL3000...
  • Page 63 Level 3 ITEM FUNCTION SPEC Buzzer/Mic Replace LED Replace Murcury Battery Replace SOLDER STATION Weller WES50 SOLDER WIRE Kester 0.6mm FLUX PASTE Fmkanc32-200 MAGANIFY(20 TIME) Motic 20x~80x DOUBLE TAPY (3M) 8*22 mm TAPE CUTER MACHINE PINCES Pick up small part SCREW DRIVE Screwing HIOS CL3000...

  • Page 64: Chapter 10. Equipment List

    Chapter 10. Equipment List Level 2 ITEM FUNCTION SPEC Dummy Battery Multimeter OSC SCOPE SPECTRUM Level 3 ITEM FUNCTION SPEC HP 8960/HP 8922/R&S CMU200 HP 66311B (DC Power) GPIB Card (HP82350A) Dummy Battery Multimeter OSC SCOPE SPECTRUM HP E6392B - 64 -...

  • Page 65: Chapter 11 - Exploded View

    Chapter 11. Exploded View & Replacement Part List 11.1 Exploded View -65-...
  • Page 66 Main Board + Keypad SAFY0078401 SNGF0002201 R3930047M0 ANTENNA EMBEDED(IN BUILD ANTENNA) M8 J103 ENZY0012801 R3010218M0 Battery connector C07-105-0029 ACGM0022802 R2720244R0 B1300 Rear Case Assembly (SV) MCCF0010801 R3814030J0 B1300 RUBBER CAP FOR ANTENNA SBPL0064501 JB040094A0 BATTERY PACK,LI-ION MCJA0004502 R2770040R0 B1300 Battery Cover (SV)

  • Page 67: Replacement Part List

    11-2 Replacement Part List Chip set Location No. LG Part No. GVC Part No. Description Service U201 CG010288B0 ASIC ULYSSE Hercrom200 DBBµBGA_179p U202 CG010438B0 ASIC Nausica_CS TWL3012GGM ABB µBGA_100p IC ASIC Clara Transceiver TRF6150 S-PQFP-G64 U601 CG01042DB0 Re3.1 Memory Item Location No.
  • Page 68 Electronic - Passive Item Location No. LG Part No. GVC Part No. Description Service R106,R302,R361,R362 FM21000010 CHIP RES 1/16W 5% 0ohm 1005 ,R363 R107,R108,R114,R354 FM210479X0 CHIP RES 1/16W 5% 4.7ohm 1005 R616,R618 FM210689X0 CHIP RES 1/16W 5% 6.8ohm 1005 R327...
  • Page 69 Item Location No. LG Part No. GVC Part No. Description Service R103 FP911024X0 CHIP RES ARRAY 1/16W 5% 1Kohm 4P2R MNR02 R210,R215,R628 FP911025X0 CHIP RES ARRAY 1/16W 5% 1K 8P4R MNR04 CHIP RES ARRAY 1/16W 5% 100Kohm 8P4R R109 FP91104510...
  • Page 70 Item Location No. LG Part No. GVC Part No. Description Service C605,C617,C621,C646 GM62705270 CHIP MONO 1005 27p/50V JN ,C668 C657,C658 GM63302270 CHIP MONO 1005 33p/50V JN C110,C111,C112,C114 ,C228,C231,C232,C30 1,C313,C330,C331,C3 32,C333,C334,C337,C GM64705270 CHIP MONO 1005 47p/50V JN 338,C341,C355,C628, C633,C309,C310,C311 ,C312,C356,C357 C609...
  • Page 71 R2710338R0 B1300 Front Case (SV) MDAL0002501 R2920002A0 B1300 bezel for LG MWAZ0002901 R3870192R0 B1300 LENS FOR LG ACGM0022801 R2720271R0 B1300 Rear Case Assembly (CO) ACGM0022802 R2720244R0 B1300 Rear Case Assembly (SV) MCJA0004501 R2770047R0 B1300 Battery Cover (CO) MCJA0004502 R2770040R0 B1300 Battery Cover (SV)
  • Page 72 - 72 -...

  • Page 73: Chapter 12 - Repair Record Form

    Chapter 1 . Repair Record Form LITE-ON Technology Corp. PEPAIR ORDER / JOB SHEET Customer : CONTACTPHONE NO.: MODEL NO.： MSN NO.： CONTACTPHONE NO : IMEI NO.： INSPECTION ITEM LABEL WARRANTY Re-send EQUIPMENT RECEIVED ANT. ANT CAP Battery Gold-card User-card COMPLAINT NO ON/OFF POOR RECEPTION...

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