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LG F7100 Service Manual
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LG F7100 Service Manual

LG F7100 Service Manual

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Service Manual
F7100
P/N : MMBD0035501
Date: July, 2004 / Issue 1.0

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  • Page 1 Service Manual F7100 P/N : MMBD0035501 Date: July, 2004 / Issue 1.0...

  • Page 2: Table Of Contents

    Table Of Contents 4.2.1 Checking Regulator Circuit ..40 ........1. INTRODUCTION 4.2.2 Checking VCTCXO Circuit ..41 1.1 Purpose ..........5 4.2.3 Checking Transceiver 1.2 Regulatory Information ......5 Control Signal ......42 A. Security ..........5 4.2.4 Checking Antenna Switch & B.
  • Page 3 B. Tx ..........104 D. Procedure ........89 C. Rx ..........104 11.3 Means of Test ........ 105 ......90 7. BLOCK DIAGRAM ....107 12. AUTO CALIBRATION ......91 8. CIRCUIT DIAGRAM 12.1 Overview ........107 12.2 Requirements ........ 107 ........

  • Page 4: Introduction

    1. INTRODUCTION 1. INTRODUCTION 1.1 Purpose This manual provides the information necessary to repair, calibration, description and download the features of this model. 1.2 Regulatory Information A. Security Toll fraud, the unauthorized use of telecommunications system by an unauthorized part (for example, persons other than your company’s employees, agents, subcontractors, or person working on your company’s behalf) can result in substantial additional charges for your telecommunications services.

  • Page 5: Pictures

    1. INTRODUCTION F. Pictures The pictures in this manual are for illustrative purposes only; your actual hardware may look slightly different. G. Interference and Attenuation Phone may interfere with sensitive laboratory equipment, medical equipment, etc.Interference from unsuppressed engines or electric motors may cause problems. H.
  • Page 6 1. INTRODUCTION OPLL Offset Phase Locked Loop Power Amplifier Module Printed Circuit Board Programmable Gain Amplifier Phase Locked Loop PSTN Public Switched Telephone Network Radio Frequency Receiving Loudness Rating Root Mean Square Real Time Clock Surface Acoustic Wave Subscriber Identity Module Sending Loudness Rating SRAM Static Random Access Memory...

  • Page 7: Performance

    2. PERFORMANCE 2.PERFORMANCE 2.1 H/W Features Item Feature Comment Standard Battery Li-ion,820mAh Size : (open) 121.2 X 45.5 X 21mm (close) 97 X 45.5 X 21mm Weight : 91g Charging Time 3Hours Display 128X160 pixel 65K STN LCD Internal Ear Phone Jack PC synchronization Speech Coding EFR/FR/HR...

  • Page 8: Technical Specification

    2. PERFORMANCE 2.2 Technical Specification Item Description Specification TX: 890 + n 0.2 MHz RX: 935 + n 0.2 MHz (n = 1 ~ 124) EGSM Frequency Band TX: 890 + (n – 1024) 0.2 MHz RX: 935 + (n – 1024) 0.2 MHz (n = 975 ~ 1024) TX: 1710 + (n –...
  • Page 9 2. PERFORMANCE Item Description Specification GSM, EGSM Offset from Carrier (kHz). Max. dBc +0.5 600 ~ 1,200 1,200 ~ 1,800 1,800 ~ 3,000 3,000 ~ 6,000 Output RF Spectrum 6,000 (due to modulation) Offset from Carrier (kHz). Max. dBc +0.5 600 ~ 1,200 1,200 ~...
  • Page 10 2. PERFORMANCE Item Description Specification GSM, EGSM BER (Class II) < 2.439% @-102 dBm Bit Error Ratio BER (Class II) < 2.439% @-100 dBm RX Level Report Accuracy ± 3 dB 8 ± 3 dB Frequency (Hz) Max.(dB) Min.(dB) Sending Response 1,000 2,000 3,000...
  • Page 11 2. PERFORMANCE Item Description Specification 32.768KHz tolerance ≤ 30 ppm Full power < 243 mA (GSM, EGSM) ; < 209 mA (DVS) Power Consumption Standby - Normal < 4 mA (Max. power) Talk Time 2h 30m (RF power level 7) At least 80 dB under below conditions: Ringer Volume 1.

  • Page 12: Technical Brief

    3. TECHNICAL BRIEF 3. TECHNICAL BRIEF 3.1 Transceiver (SI4205-BM, U402) The RF parts consist of a transmitter part, a receiver part, a frequency synthesizer part, a voltage supply part, and a VCTCXO part. The Aero I transceiver is the integrated RF front end for multi-band GSM/GPRS digital cellular handsets and wireless data modems.
  • Page 13 3. TECHNICAL BRIEF Table 3-1 The Logic and current Current DCS TX 2.5 ~ 3.0V 10.0 mA max GSM TX 2.5 ~ 3.0V 10.0 mA max GSM/DCS RX < 0.1 mA Three differential-input LNAs are integrated in SI4205. The GSM input supports the GSM 850 (869- 849 MHz) or E-GSM 900 (925-960MHz) bands.
  • Page 14 3. TECHNICAL BRIEF special processing is required in the baseband for offset compensation or extended dynamic range. Compared to a direct-conversion architecture, the low-IF architecture has a much greater degree of immunity to dc offsets that can arise from RF local oscillator(RFLO) self-mixing, 2nd order distortion of blockers, and device 1/f noise.
  • Page 15 3. TECHNICAL BRIEF signals are automatically swapped when switching bands. Additionally, the SWAP bit in register 03h can be used to manually exchange the I and Q signals. Low-pass filters before the OPLL phase detector reduce the harmonic content of the quadrature modulator and feedback mixer outputs.

  • Page 16: Power Amplifier Module (Rf3133, U401)

    3. TECHNICAL BRIEF 3.2 Power Amplifier Module (RF3133, U401) The RF3133 is a high-power, high-efficiency power amplifier module with integrated power control. The device is self-contained with 50Ω input and output terminals. The power control function is also incorporated, eliminating the need for directional couplers, detector diodes, power control ASICs and other power control circuitry;...

  • Page 17: 13 Mhz Clock

    3. TECHNICAL BRIEF 3.3 13 MHz Clock The 13 MHz clock(X401) consists of a TCXO(Temperature Compensated Crystal Oscillator) which oscillates at a frequency of 13 MHz. It is used within the Si4205, analog base band chipset(U102,AD6521), digital base band chipset(U101, AD6525), and MIDI (U204) chipset. 2V75_VTCXO X401 R412...

  • Page 18: Digital Main Processor (Ad6525, U101)

    3. TECHNICAL BRIEF 3.5 Digital Main Processor (AD6525, U101) (1) Architecture Overview Figure 3-8 Block Diagram of the AD6525 Internal Architecture The internal architecture of AD6525 is shown in Figure 3-8. AD6525 regroups three main subsystems connected together through a dynamic and flexible communication by network. It also includes onboard system RAM (SRAM) and interfaces with external Flash Memory, Baseband converter functions, and terminal functions like MMI, SIM and Universal System Connector (USC).
  • Page 19 3. TECHNICAL BRIEF For program and data storage, both the MCU subsystem and the DSP subsystem can access the on chip system SRAM and external memory such Flash Memory. The access to the SRAM module is made through the RAM Bus (RBUS) under the control of the bus arbitration logic. Similarly, access to the Flash Memory is through the parallel External Bus (EBUS).
  • Page 20 3. TECHNICAL BRIEF (2) Interconnection with external devices A. RTC Block Interface Countered by external crystal oscillator (MC-146, X101). The X-tal oscillates 32.768 KHz. B. LCD Module Interface Controlled by LCD_CS, LCD_RES, ADD01, WR, DATA[0:15], DIM_CNTL, and LCD_ID. Table 3-3 LCD module interface Description LCD_CS LCD driver chip enable.
  • Page 21 3. TECHNICAL BRIEF D. SIM Interface The AD6525 check status periodically in call mode if SIM card is inserted or not, but the AD6525 don't check in deep sleep mode. Interface signals are SIM_DATAOP, SIM_CLK, SIM_RST, SIM_EN Table 3-5 SIM interface Description This pin receives and sends data to SIM card.

  • Page 22: Analog Main Processor (Ad6521, U102)

    3. TECHNICAL BRIEF 3.6 Analog Main Processor (AD6521, U102) (1) Block Diagram Figure 3-10 Functional Block Diagram of AD6521 - 23 -...
  • Page 23 3. TECHNICAL BRIEF (2) BB Transmit Section This section generates in-phase and quadrature BB modulated GMSK signals (BT = 0.3) in accordance with GSM 05.05 Phase 2 specifications. The transmit channel consists of a digital GMSK modulator, a matched pair of 10-bit DACs and a matched pair of reconstruction filter.
  • Page 24 3. TECHNICAL BRIEF 2V55_VAN 1V8_VCORE 2V8_VMEM R101 C107 100K C108 C180 ITXP TXIP ITXN TXIN QTXN TXQN QTXP TXQP IRXP RXIP RXON IRXN RXIN TXON QRXP RXQP QRXN RXQN MCLK MCLKEN 2V8_VMEM RESET AFCDAC ARSM RAMPDAC TX_RAMP U102 ATSM R103 ASDO REFCAP AD6521...

  • Page 25: Power Management Ic (Adp3522, U202)

    3. TECHNICAL BRIEF 3.7 Power Management IC (ADP3522, U202) Block Diagram Figure 3-12 Block Diagram of ADP3522. - 26 -...
  • Page 26 3. TECHNICAL BRIEF Table 3-7 LDOs of ADP3522. Description VSIM 2.85V (is provided to Sim card) VCORE 1.8V (is provided to the AD6525 & AD6521’s digital core) VRTC 2.0V (is provided to the RTC and Backup Battary) 2.55V (is provided to the AD6521 I/O and used as microphone bias) VTCXO 2.75V (is provided to VCTCXO) VMEN...

  • Page 27: Memory (U201)

    3. TECHNICAL BRIEF 3.8 Memory (U201) The memory is consists of 128Mbit Nor Flash Memory and 32Mbit Pseudo SRAM. It has 16 bit parallel data bus and 22 bit address. Software, RF calibration data, audio parameters and battery calibration data are stored in the Flash memory.
  • Page 28 3. TECHNICAL BRIEF Table 3-8 Pin Description of U201. A-1,A0 to A21 Address inputs DQ0 to DQ15 Data inputs / outputs , CE2 Chip enable inputs for Pseudo SRAM CEf1 , CEf2 Chip enable inputs for Nor Flash Memory Output enable input Write enable input LB , UB Data byte control inputs for Pseudo SRAM...

  • Page 29: Lcd And Lcd Backlight

    3. TECHNICAL BRIEF 3.9 LCD and LCD Backlight (1) LCD Features Display Mode : 65K Color STN LCD Color Depth : 32(Red) * 64(Green) * 32(Blue) = 65K Color Resolution : 128 * RGB * 160 dots for Color display Interface : 8080-series MPU interface Data bus : 16 bit Parallel interface Duty ratio : 1/160 Duty for Color display...

  • Page 30: Keypad Switches And Key Backlight Illumination

    3. TECHNICAL BRIEF 3.10 Keypad Switches and Key Backlight Illumination (1) Keypad Switches The key switches are metal domes, which make contact between two concentric pads on the keypad layer of the PCB when pressed. There are 21 switches , connected in a matrix of 5 rows by 5 columns, as shown in Figure, except for the power switch (END), which is connected independently.

  • Page 31: Key Backlight

    3. TECHNICAL BRIEF (2) Key Backlight Illumination There are 10 blue LEDs for key backlight illumination which are driven by KEY_BL signal from AD6525. KEY BACKLIGHT VBAT VBAT KEY_BL1 KEY_BL2 R604 R605 R606 R607 R608 R609 R610 R611 R612 R613 Q202 IMX9T110 SP206...

  • Page 32: Microphone

    3. TECHNICAL BRIEF 3.11 Microphone The microphone is placed to KEY PCB. The audio signal is passed to VINNORP and VINNORN pins of AD6521. The voltage supply 2V55_VAN is output from ADP3522, and is a bias voltage for the VINNORP. The VINNORP and VINNORN signals are A/D converted by the Voiceband ADC part of AD6521.

  • Page 33: Dual Mode Speaker And Midi Ic

    3. Technical brief 3.12 Dual Mode Speaker and MIDI IC (1) Dual Mode Speaker There is a control signal (SPK_SEN) which is for enabling receiver or speaker because one dual mode speaker is used for both receiver and speaker. The signal is produced by AD6525 and controls the analog switch (U203).
  • Page 34 3. TECHNICAL BRIEF (2) MIDI IC (YMU762, U204) The phone uses melody IC which makes the robust joyful melody sounds. 6 signals (MIDI_RST, ADD00, RD, MIDI_CS, WR, MIDI_IRQ) from AD6525 are used to control the melody IC. Melody data (DATA[8:15]) is transferred to melody IC and played by the dual mode speaker. External 3.3V LDO (U206) is used for the MIDI chip because the maximum output current of analog amplifier in melody IC is 300mA.

  • Page 35: Headset Jack Interface

    3. TECHNICAL BRIEF 3.13 Headset Jack Interface 3-pole type ear-mic jack which has three electrodes such as Receiver+, Mic+, and GND. This type usually supports only single-ended configuration (VOUTAUXP for headset speaker and VINAUXP for headset mic) in the audio path. There are two control signals for jack interface.

  • Page 36: Compass

    3. TECHNICAL BRIEF 3.14 Compass The AMI201 is a magnetic sensor for use in electronic compasses that integrates Two perpendicularly positioned Magneto-Impedance sensors with their controller IC in a single small package. The AMI201 outputs linear voltages corresponding to the magnetic field strength in the direction of each of the two sensors.

  • Page 37: Trouble Shooting

    4. TROUBLE SHOOTING 4. TROUBLE SHOOTING 4.1 RF Components SW401 FL401 FL402, FL403 U410 U401 U402 X401 Figure 4-1 Table 4-1 Reference Description Reference Description U402 RF Main Chipset FL402 GSM SAW Filter SW401 Mobile S/W FL403 DCS SAW Filter FL401 Ant.

  • Page 38: Rx Trouble

    4. TROUBLE SHOOTING 4.2 RX Trouble START SS : Test mode 62 CH, 7 level setting (TCH) 62 CH, -60dBm setting (BCCH) Spectrum analyzer setting Oscilloscope setting Figure 4-2 1. Check Regulator Circuit 2. Check VCTCXO Circuit 3. Check Control Signal 4.

  • Page 39: Checking Regulator Circuit

    4. TROUBLE SHOOTING 4.2.1 Checking Regulator Circuit U410.3 U410.5 Figure 4-3 Check Pin 3. Changing the Board Check Pin 5. RF 2.85V O.K? Pin3. High ? Replace U410 Regulator Circuit is OK See next Page to check VCTCXO VBAT RF2.85V U410 C438 CLK_ON...

  • Page 40: Checking Vctcxo Circuit

    4. TROUBLE SHOOTING 4.2.2 Checking VCTCXO Circuit X401.3 X401.4 Figure 4-4 VCTCXO Circuit is OK Check Pin 3. See next Page to check 13 MHz O.K? Refer to Graph 4-4 ANT SW & Mobile SW Check Pin 4. Changing X401 2.75V OK? Refer to Graph 4-4 Check U202, PMIC...

  • Page 41: Checking Transceiver Control Signal

    4. TROUBLE SHOOTING 4.2.3 Checking Transceiver Control Signal S_DATA (TP404) S_CLK (TP403) S_EN (TP402) RF_PWR_DWN (TP401) Figure 4-5 Check TP 401. Download the SW Level is High? Check TP 402, 403, 404. Check if there is Download the SW Similar? Any Major Difference Refer to Graph 4-5 Control Signal is OK...

  • Page 42: Checking Antenna Switch & Mobile Switch

    4. TROUBLE SHOOTING 4.2.4 Checking Antenna Switch & Mobile Switch Sw401 Pin1 FL401 ANT1 C401 1.5p R401 SW401 Pin2 R401 C402 C433 SW401 KMS-507 FL403 C436 C411 C426 FL402 FL401 C422 GND1 GND2 EGSM_TX C428 GND3 DCS_TX C424 GND4 GND5 GND6 EGSM_RX GND7...

  • Page 43: Checking Saw Filter

    4. TROUBLE SHOOTING 4.2.5 Checking SAW Filter C422 FL402 C423 L403 22nH B7820 C424 FL403 C423 C426 1.5p C426 FL403 FL402 L404 6.8nH C422 B7821 C428 C428 C424 1.5p Circuit Diagram 4-4 L403 L404 figure 4-7 FL402.1: ~ -62dBm Changing C423 or FL402 for EGSM Check RF Level of Saw FL403.1: Changing FL403 for DCS...

  • Page 44: Checking Rx Iq

    4. TROUBLE SHOOTING 4.2.6 Checking RX IQ C419 C421 RXQP C419 RXQN RXIP C421 RXIN Circuit Diagram 4-5 figure 4-8 Check C419, C421. Check if there is Replace U402 Similar? Any Major Difference Refer to Graph 4-6 Redownload the Software And calibrate Graph 4-6 - 45 -...

  • Page 45: Tx Trouble

    4. TROUBLE SHOOTING 4.3 TX Trouble START SS : Test mode 62 CH, 7 level setting (TCH) 62 CH, -60dBm setting (BCCH) Spectrum analyzer setting Oscilloscope setting 1. Check Regulator Circuit 2. Check VCTCXO Circuit 3. Check Control Signals 4. Check TX IQ Figure 4-9 5.

  • Page 46: Checking Regulator Circuit

    4. TROUBLE SHOOTING 4.3.1 Checking Regulator Circuit U410.3 Figure 4-10 U410.5 Check Pin 3. Changing the Board Check Pin 5. RF 2.85V O.K? Pin3. High ? Regulator Circuit is OK Replace U410 See next Page to check VCTCXO VBAT RF2.85V U410 C438 CLK_ON...

  • Page 47: Checking Vctcxo Circuit

    4. TROUBLE SHOOTING 4.3.2 Checking VCTCXO Circuit X401.3 X401.4 figure 4-11 VCTCXO Circuit is OK Check Pin 3. 13 MHz O.K? See next Page to check Refer to Graph 4-4 ANT SW & Mobile SW Changing X400 Check Pin 4. 2.75V OK? Refer to Graph 4-4 Check U301, PMIC...

  • Page 48: Checking Pll Control Signal

    4. TROUBLE SHOOTING 4.3.3 Checking PLL Control Signal S_DATA (TP404) S_CLK (TP403) S_EN (TP402) RF_PWR_DWN (TP401) figure 4-12 Figure 4-12 Download the SW Check TP 401. Level is High? Check TP 402, 403, 404. Check if there is Download the SW Similar? Any Major Difference Refer to Graph 4-5...

  • Page 49: Checking Tx Iq

    4. TROUBLE SHOOTING 4.3.4 Checking TX IQ C425 C427 TXIP C425 TXIN TXQP C427 TXQN Circuit Diagram 4-8 figure 4-13 Check C425, C427. Check if there is Replace U402 Similar? Any Major Difference Refer to Graph 4-12 Redownload the Software And calibrate Graph 4-12 - 50 -...

  • Page 50: Checking Pam Control Signal

    4. TROUBLE SHOOTING 4.3.5 Checking PAM Control Signal PA_EN PA_BAND Figure 4-14 TX_RAMP For DCS PA_BAND=High, Change board For GSM PA_BAND=Low Check TX_RAMP and PA_EN Check if there is Download S/W Similar? Any Major Difference or not Refer to Graph 4-13 Go to Next Step Graph 4-13 - 51 -...

  • Page 51: Checking Antenna Switch & Mobile Switch

    4. TROUBLE SHOOTING 4.3.6 Checking Antenna Switch & Mobile Switch ANT1 Sw401 Pin1 FL401 C401 1.5p R401 R401 SW401 Pin2 C402 SW401 KMS-507 C433 FL403 C436 C411 C426 FL401 FL402 GND1 GND2 EGSM_TX C422 GND3 DCS_TX C428 GND4 GND5 C424 GND6 EGSM_RX GND7...
  • Page 52 4. TROUBLE SHOOTIng Graph 4-14 GSM TX Graph 4-15 DCS TX - 53 -...

  • Page 53: Checking Antenna Contact

    4. TROUBLE SHOOTING 4.3.7 Checking Antenna Contact R401 C460 C401 ANT1 ANT2 C460 C401 1.5p R401 C402 Figure 4-16 C402 Circuit Diagram 4-10 ANT2 , GND is short? Resolder C460 Check R401, Resoldering R401, C402,C401 soldering C402,C401 Check ant contact Contact antenna Change the board...

  • Page 54: Power On Trouble

    4. TROUBLE SHOOTING 4.4 Power On Trouble SETTING: Connect PIF, and set remote switch off at PIF * Refer to Figure 4-17 START Check Battery Voltage Charge or Change Battery > 3.35V ? Push power-on key Check the contact of power-key and check the level change or dome switch.
  • Page 55 4. TROUBLE SHOOTING P20: 2V8_VMEM P3: 2V0_VRTC P21: 1V8_VCORE P25: 2V75_VTCXO P29: RPWRON P30: POWRKEY Figure 4-17 VBAT 2V8_VMEM C201 C253 VCHARGE 0.1u (1608) VBAT R202 VSIM 100K 1V8_VCORE POWERKEY _PWRONKEY ROWX KEY_ROW0 VSIM 2V55_VAN RPWRON PWRONIN VCORE 2V75_VTCXO VCHARGE CLK_ON TCXOEN SIM_EN...

  • Page 56: Charging Trouble

    4. TROUBLE SHOOTING 4.5 Charging Trouble SETTING: Connect the battery (3.4 ~ 4V) and the charging adaptor(TA) to the phone START Charging Connector(CN310) Re-solder CN310. well-soldered? The charging adaptor(TA) is out of order. Voltage at Pin 7 of U202 Change the charging adaptor. = 5.2V? R203,Q201,D201 Re-solder R203,Q201,D201.
  • Page 57 4. TROUBLE SHOOTING D201 Q201 R203 Figure 4-18 VBAT 2V8_VMEM C201 C253 VCHARGE 0.1u (1608) VBAT R202 VSIM 100K 1V8_VCORE POWERKEY _PWRONKEY ROWX KEY_ROW0 VSIM 2V55_VAN RPWRON PWRONIN VCORE 2V75_VTCXO VCHARGE CLK_ON TCXOEN SIM_EN SIMEN 2V8_VMEM RESCAP 2V0_VRTC C203 SIMVSEL VTCXO C202 1000p...

  • Page 58: Lcd Trouble

    4. TROUBLE SHOOTING 4.6 LCD Trouble START Refer to Power is supplied to Pow er On Trouble the board? Connection between Reconne ct LCD Module and board is OK? Module CN303 is soldered well? Resolder the CN303 Paths of LCD control Resolder signals are OK? R328 ~ R349...
  • Page 59 4. TROUBLE SHOOTING Check soldering around connector R328~R349 Figure 4-19 CN303 Figure 4-20 128 x 160 LCD CONNECTOR 2V8_VMEM VBAT CN303 LCD_BL R328 1K LCD_CS LCD_RST R329 R330 ADD01 R333 1K R334 1K DATA00 DATA01 R335 R336 DATA02 DATA03 R337 1K R338 1K DATA04 DATA05...

  • Page 60: Receiver Trouble

    4. TROUBLE SHOOTING 4.7 Receiver Trouble Contact Point Dual mode speaker R217 U203 R215 R216 Figure 4-21 2V8_VMEM U203 NLAS4684MR2 C217 CN210 COM2 REC_SPK- C218 COM1 REC_SPK+ C224 C225 R215 VA201 REC_P SP201 SP202 C226 VA202 C228 SPK_SEL AVL14K02200 R216 AVL14K02200 REC_N C231...
  • Page 61 4. TROUBLE SHOOTING START Set audio part at test equipment as PRBS or continuous w ave, not echo. Set the audio volume max. Does sine wave ABB is out of order. appear Change the board. at R215, R216 ? Check the soldering state of SPK_SEL signal is U203 and R217.

  • Page 62: Speaker Trouble

    4. TROUBLE SHOOTING 4.8 Speaker Trouble SETTING: Connect PIF to the phone, and Power on. Enter The engineering mode, and set “Melody on” at Buzzer of BB test menu START Enter into Engineering Mode and go to menu "BB test => Buzzer => Melody on" Voltage acro ss C229 Check the soldering of Re-solder U206...
  • Page 63 4. TROUBLE SHOOTING U203 R217 C223,C222 C229 C230 C206 Figure 4-22 U202 2V8_VMEM R208 R211 13MHZ CLK1 HPOUT_R MIDI_RST _RST C215 HPOUT_L R212 0.01u ADD00 MIDI_CS R213 C216 390p MIDI_IRQ _IRQ DATA08 DATA09 DATA10 Figure 4-23 DATA11 U204 SPK+ DATA12 YMU762 SPK+ DATA13...

  • Page 64: Mic Trouble

    4. TROUBLE SHOOTING 4.9 MIC Trouble 2V55_VAN R601 R601 R615 C600 C600 C603 R603 R603 C602 VA600 C601 C601 AVL5M02-200 MIC_P C602 MIC_N C603 R615 VA601 3.6K AVL5M02-200 VA600 VA601 Circuit Diagram 4-17 Figure 4-24 START Check the Check the C600 Replace the voltage at Pin23 voltage is almost is...

  • Page 65: Vibrator Trouble

    4. TROUBLE SHOOTING 4.10 Vibrator Trouble SETTING: Enter The engineering mode, and set “Vibrator on” at Vibration of BB test menu START Check the Replace virator nodes of vibrator Vibrator contack check ! When the vibrator works, the signal at this point goes to 2.8V Resolder R108 Is the Check the soldering...
  • Page 66 4. TROUBLE SHOOTING R108 R107 U103 Contact Point C117 L101 Figure 4-25 USC0 USC0 USC1 USC1 VBAT USC2 USC2 USC3 USC3 USC4 USC4 C117 U103 USC5 USC5 U101 2.2u USC6 USC6 MDC3105LT1 AD6525ACA-REEL R108 L101 100nH GPIO_0 R107 1.5K MON_RX GPIO_1 VOUT TP120...

  • Page 67: Key Backlight Led Trouble

    4. TROUBLE SHOOTING 4.11 Key Backlight LED Trouble SETTING: Connect PIF to the phone, and power on. Enter engineering mode, and set “Backlight on“ at “BB test-Backlight” menu START PIF Power On Is the Check the soldering Voltage at pin 5 at Q202 R230,R233 about 1.3 V ? Check the soldering and...

  • Page 68: Sim Detect Trouble

    4. TROUBLE SHOOTING 4.12 SIM Detect Trouble Setting: Insert the SIM into J301. Connect PIF to the phone, and power on. START Does the SIM Change the SIM. Our phone not supports 5V SIM supports 3V ? Voltage at Pin 1 of Voltage at Pin 18 of Replace U202 U202 = 2.85V?

  • Page 69: Ear Jack Trouble

    4. TROUBLE SHOOTING 4.13 Ear Jack Trouble SETTING :After Initialize SS, Test in EGSM, DCS Mode START Insert the earphone to the phone. Resolder Voltage Does the audio Voltage at Pin4 of U207 R223, profile of the phone change to at Pin1 of U207 Is higher than pin3.
  • Page 70 4. TROUBLE SHOOTING Is the signal level at R224 Redownload software. a few tens or hundreds VAC? Does it work well? Resolder R224 and J201. Change the main board. Resolder Voltage at Pin 4 of U205 R226, C240 = 1.5~1.9 VDC ? Is the signal level across C122 Resolder C122...
  • Page 71 4. TROUBLE SHOOTING R224 J201 R220 R226 U207 U205 U208 C240 C232 R223 R223 Figure 4-28 2V5_JACK R218 2V8_VMEM 2V8_VMEM C232 R219 20K 2.2K HEADSET_MIC_N C250 0.1u R229 R221 R222 C233 C234 C235 0.1u 3.3K C236 VIN- HEADSET_MIC_P 0.1u HOOK_DET VIN+ HEADSET_SPK_P R214...

  • Page 72: Compass Trouble

    4. TROUBLE SHOOTING 4.14 Compass Trouble Remove magnetic and electronic equipment for example Speaker,Monitor etc Before You test. - 73 -...
  • Page 73 4. TROUBLE SHOOTING COMPASS(U304) R365 C358 (COMPASS_XYIN) C357(COMPASS_OUT) R364 R500 R363 COMPASS_CS COMPASS_XYIN R361(COMPASS_CS) COMPASS_OUT Figure 4-29 2V8_VMEM U304 GND1 GND2 R361 R363 R364 COMPASS_CS COMPASS_OUT C355 C356 C357 R500 (1%) (1%) 0.1u XYIN 3.9K (1%) AMI201 C358 R365 COMPASS_XYIN C359 C360 Circuit Diagram 4-21...
  • Page 74 4. TROUBLE SHOOTING Compass Engineer Mode 3. Display Angle ENG.Mode ENG.Mode ENG.Mode Test BB Test Kev pad Use cal.sta RF Test MicSpk Test Fact.cal.st MF Mode Compass Display Ang Deg=256 Trace Optio All auto test Cal.value1 |H|=260 Call timer Cal.value2 Fact.reset Backlight Select...

  • Page 75: Disassembly Instruction

    5. DISASSEMBLY INSTRUCTION 5. DISASSEMBLY INSTRUCTION 5.1 Disassembly - 76 -...
  • Page 76 5. DISASSEMBLY INSTRUCTION - 77 -...
  • Page 77 5. DISASSEMBLY INSTRUCTION - 78 -...
  • Page 78 5. DISASSEMBLY INSTRUCTION - 79 -...

  • Page 79: Download And Calibration

    6. DOWNLOAD AND CALIBRATION 6. DOWNLOAD AND CALIBRATION 6.1 Download A. Download Setup Figure 6-1 describes Download setup. UART Figure 6-1. Download Setup - 80 -...

  • Page 80: Download Procedure

    6. DOWNLOAD AND CALIBRATION B. Download Procedure 1. Access Flash loader program in PC and select Erase.(Don t check OWCD) 1. Select Erase 2. Check 3. Don’t Check OWCD 2. Press Start and Wait until Erase is completed.(Code ?? erase) 1.
  • Page 81 6. DOWNLOAD AND CALIBRATION 3. Change Address and Size(Address : 18000000, Size : 0x800000), and Press Start and Wait until Erase is completed again (Alchemy 8W8Cerase) 1. Select File 2. Press Open 4. Press Write to start Download and press Key to choose software (AlchemyData.mot) 2.
  • Page 82 6. DOWNLOAD AND CALIBRATION 5. Choose software 1. Select File 2. Press Open 6. Wait until converting from MOT to BIF is completed(Don’t check OWCD) 2. Wait until completion 1. Don’t Check OWCD - 83 -...
  • Page 83 6. DOWNLOAD AND CALIBRATION 7. Press Start and Power on the phone using JIG remote Power on(Switch 1) 8. Wait until Sending Block is completed - 84 -...
  • Page 84 6. DOWNLOAD AND CALIBRATION 9. Press Write to start Download and press Key to choose software(CodeData.mot) 10. Choose software - 85 -...
  • Page 85 6. DOWNLOAD AND CALIBRATION 11. Wait until Sending Block is completed 1. Wait Until Sending Block is completed - 86 -...

  • Page 86: Calibration

    6. DOWNLOAD AND CALIBRATION 6.2 Calibration A. Equipment List Table 6-1. Calibration Equipment List Equipment for Calibration Type / Model Brand Wireless Communication Test Set HP-8960 Agilent RS-232 Cable and Test JIG RF Cable Power Supply HP-66311B Agilent GPIB interface card HP-GPIB Agilent Calibration &...

  • Page 87: Test Jig Operation

    6. DOWNLOAD AND CALIBRATION Figure 6-3. The top view of Test JIG C. Test Jig Operation Table 6-2. Calibration Equipment List Power Source Description Power Supply usually 4.0V Travel Adaptor Use TA, name is TA-20G(24pin) Table 6-3. Calibration Equipment List Switch Number Name Description...

  • Page 88: Procedure

    6. DOWNLOAD AND CALIBRATION 1. Connect as Fig 6-2(RS232 serial cable is connected between COM port of PC and MON port of TEST JIG, in general) 2. Set the Power Supply 4.0V 3. Set the 3 rd , 4 th of DIP SW ON state always 4.

  • Page 89: Block Diagram

    7. BLOCK DIAGRAM 7. BLOCK DIAGRAM - 90 -...

  • Page 90: Circuit Diagram

    05/21 LEE S.Y. Designer SPFY0068901 2004 GUIDE HOLE 05/21 KIM B.Y. Checked 2004 YOUN K.J. DRAWING MAIN NAME 05/21 CHO J.G. Approved 2004 DRAWING Iss. Notice No. Date Name LG Electronics Inc. V1.1 LGIC(42)-A-5505-10:01 LG Electronics Inc. - 91 -...
  • Page 91 KIM B.Y. C260 U207 Checked 620K MAX9075EXK-T 2004 YOUN K.J. DRAWING AVL14K02200 Audio,Memory,Power AVL14K02200 NAME 05/21 CHO J.G. SP203 SP204 SP205 Approved 2004 DRAWING Iss. Notice No. Date Name V1.1 LG Electronics Inc. LGIC(42)-A-5505-10:01 LG Electronics Inc. - 92 -...
  • Page 92 AMI201 C358 05/21 KIM B.Y. R365 Checked COMPASS_XYIN 2004 YOUN K.J. DRAWING C359 C360 I/O conn,LCD conn NAME 05/21 Approved CHO J.G. 2004 DRAWING V1.1 Iss. Notice No. Date Name LG Electronics Inc. LGIC(42)-A-5505-10:01 LG Electronics Inc. - 93 -...
  • Page 93 Sheets F7100 C456 C457 R489 05/21 Designer LEE S.Y. 2004 KIM B.Y. RF BOARD TEMPERATURE 05/21 Checked 2004 YOUN K.J. DRAWING NAME 05/21 Approved CHO J.G. 2004 DRAWING Iss. Notice No. Date Name V1.1 LG Electronics Inc. - 94 -...
  • Page 94 C609 MODEL F7100 04/28 Designer LEE S.Y. 2004 KIM B.Y. 04/28 SPEY0021101 Checked 2004 YOUN K.J. DRAWING KEYPAD NAME 04/28 Approved CHO J.G. 2004 DRAWING Ver.1.0 Iss. Notice No. Date Name LG Electronics Inc. LG Electronics Inc. - 95 -...

  • Page 95: Pcb Layout

    9. PCB LAYOUT - 96 -...
  • Page 96 9. PCB LAYOUT - 97 -...
  • Page 97 Note. - 98 -...

  • Page 98: Engineering Mode

    10. ENGINEERING MODE 10. ENGINEERING MODE A. About Engineering Mode Engineering mode is designed to allow a service man/engineer to view and test the basic functions provided by a handset. B. Access Codes The key sequence for switching the engineering mode on is 2945#*#. Pressing END will switch back to non-engineering mode operation.

  • Page 99: Bb Test [Menu 1]

    10. ENGINEERING MODE 10.1 BB Test [MENU 1] Baseband Test 10.1.1 LED This Menu is to test the indicator LED on the folder of a handset. 1) Left RED on: Red light turns on in Left indicator LED 2) Right RED on:Red light turns on in Right indicator LED 3) Left GREEN on: Green light turns on in Left indicator LED 4) Right GREEN on:Green light turns on in Right indicator LED 5) Left ORANGE on: Orange light turns on in Left indicator LED...

  • Page 100: Adc (Analog To Digital Converter)

    10. ENGINEERING MODE 10.1.6 ADC (Analog to Digital Converter) This displays the value of each ADC. 1) MVBAT ADC: Main Voltage Battery ADC 2) AUX ADC: Auxiliary ADC 3) TEMPER ADC: Temperature ADC 10.1.7 BATTERY 1) Bat Cal: This displays the value of Battery Calibration. The following menus are displayed in order: BAT_LEV_4V, BAT_LEV_3_LIMIT, BAT_LEV_2_LIMIT, BAT_LEV_1_LIMIT, BAT_IDLE_LI MIT, BAT_INCALL_LIMIT, SHUT_DOWN_VOLTAGE, BAT_RECHARGE_LMT...

  • Page 101: Rf Test [Menu 2]

    10. ENGINEERING MODE 10.2 RF Test [MENU 2] Radio Frequency Test 10.2.1 SAR test This menu is to test the Specific Absorption Rate. 1) SAR test on: Phone continuously process TX only. Call-setup equipment is not required. 2) SAR test off: TX process off 10.3 MF mode [MENU 3] This manufacturing mode is designed to do the baseband test automatically.

  • Page 102: Lcd

    10. ENGINEERING MODE 10.3.6 LCD Main LCD screen resolution tests horizontally and vertically one by one and fills the screen. 10.3.7 Key pad When a pop-up message shows ‘Press Any Key’, you may press any keys including side keys, but not [Soft2 Key].

  • Page 103: Stand Alone Test

    11. STAND ALONE TEST 11. STAND ALONE TEST 11.1 Introduction This manual explains how to examine the status of RX and TX of the model. A. Tx Test TX test - this is to see if the transmitter of the phones is activating normally. B.

  • Page 104: Means Of Test

    11. STAND ALONE TEST 11.3 Means of Test a. Select a COM port b. Set the values in Tx or Rx c. Select band and channel d. After setting them all above, press connect button. e. Press the start button Figure 11-1.
  • Page 105 11. STAND ALONE TEST Figure 11-2. HW test setting Figure 11-3. Ramping profile - 106 -...

  • Page 106: Auto Calibration

    12. AUTO CALIBRATION 12. AUTO CALIBRATION 12.1 Overview Autocal (Auto Calibration) is the PC side Calibration tool that perform Tx ,Rx and Battery Calibration with Agilent 8960(GSM call setting instrument) and Tektronix PS2521G(Programmable power supply). Autocal generate calibration data by communicating with phone and measuring equipment then write it into calibration data block of flash memory in GSM phone.
  • Page 107 12. AUTO CALIBRATION Figure 12-1. Auto Calibration Program -Screen Cable loss: Enter the RF cable loss GSM and DCS -Screen GPIB(Primary address): Enter the SS(Ag8960) and PS(Tektronix PS2521G) GPIB address -Screen ADC Channel: Default ADC Calibration Channel -Screen Auto Calibration Item: Default Calibration Settings about Tx, Rx, ADC and write BIN file - 108 -...

  • Page 108: Agc

    12. AUTO CALIBRATION 12.4 AGC This procedure is for Rx calibration. In this procedure, We can get RSSI correction value. Set band EGSM and press Start button the result window will show correction values per every power level and gain code and the same measure is performed per every frequency.
  • Page 109 Note. - 110 -...

  • Page 110: Exploded View & Replacement Part List

    13. EXPLODED VIEW & REPLACEMENT PART LIST 13.1 Exploded View - 111 -...
  • Page 111 Note. - 112 -...

  • Page 112: Replacement Part (Mechanic Components)

    13. EXPLODED VIEW & REPLACEMENT PART LIST 13.2 Replacement Parts Note: This Chapter is used for reference, Part order is ordered by SBOM standard on GCSC <Mechanic component> - 113 -...
  • Page 113 13. EXPLODED VIEW & REPLACEMENT PART LIST - 114 -...

  • Page 114: (Main Components)

    13. EXPLODED VIEW & REPLACEMENT PART LIST 13.2 Replacement Parts Note: This Chapter is used for reference, Part order is ordered by SBOM standard on GCSC <Main component> - 115 -...
  • Page 115 13. EXPLODED VIEW & REPLACEMENT PART LIST - 116 -...
  • Page 116 13. EXPLODED VIEW & REPLACEMENT PART LIST - 117 -...
  • Page 117 13. EXPLODED VIEW & REPLACEMENT PART LIST - 118 -...
  • Page 118 13. EXPLODED VIEW & REPLACEMENT PART LIST - 119 -...
  • Page 119 13. EXPLODED VIEW & REPLACEMENT PART LIST - 120 -...
  • Page 120 13. EXPLODED VIEW & REPLACEMENT PART LIST - 121 -...
  • Page 121 13. EXPLODED VIEW & REPLACEMENT PART LIST - 122 -...
  • Page 122 13. EXPLODED VIEW & REPLACEMENT PART LIST - 123 -...
  • Page 123 13. EXPLODED VIEW & REPLACEMENT PART LIST - 124 -...
  • Page 124 13. EXPLODED VIEW & REPLACEMENT PART LIST - 125 -...
  • Page 125 13. EXPLODED VIEW & REPLACEMENT PART LIST - 126 -...

  • Page 126: Accessories

    13. EXPLODED VIEW & REPLACEMENT PART LIST 13.3 Accessories Note: This Chapter is used for reference, Part order is ordered by SBOM standard on GCSC - 127 -...

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