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Pantech GB210 Service Manual

Gsm cellular phone
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GB210 Service Manual
GB210
GB210 Service Manual
(GSM Cellular Phone)
Pantech Co., Ltd., Korea
July 19, 2004
st
1
Edition
For Use by Authorized Service/Maintenance Personal Only
Documents to Receive This Addendum:
GB210 Maintenance/Repair/Operating Manual

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  • Page 1 GB210 Service Manual GB210 GB210 Service Manual (GSM Cellular Phone) Pantech Co., Ltd., Korea July 19, 2004 Edition For Use by Authorized Service/Maintenance Personal Only Documents to Receive This Addendum: GB210 Maintenance/Repair/Operating Manual...

  • Page 2: Table Of Contents

    GB210 Service Manual CONTENTS SECTION 1 INTRODUCTION ......................3 1.1 I ..........................3 NTRODUCTION 1.2 F ...................3 REQUENCY LLOCATION AND 1.3 I ........................4 AME AND 1.4 C .........................4 HARACTERISTICS SECTION 2 ELECTRICAL SPECIFICATIONS..................5 2.1 G ............................5 ENERAL 2.2 T …………………………………………………………………………………………….5 RANSMITTER 2.3 R …………………………………………………………………………………………………5...
  • Page 3 GB210 Service Manual 6.3 SIM CARD PART ……………………………………...…………………………………………….38 6.3.1 SIM ………………………………………………………………………………………….38 ERROR 6.4 CHARGER PART……………………………………………………………………………………..39 6.4.1 C ………………………………..…………………………………………………39 HARGING ERROR 6.5 CAMERA SENSOR PART… ………………………………………………………………………..41 6.5.1 CAMERA PREVIEW ERROR………..……………… …………..…………………….…………41 6.6 RF PART…………….………………………………………………………………………………… 43 6.6.1 T ………………………………………………………………… …………………43 EST CONDITIONS 6.6.2 P...

  • Page 4: Section 1 Introduction

    GB210 Service Manual SECTION 1. Introduction 1.1 An Introduction of GSM Digital Cellular Mobile Communication System GSM (Global System for Mobile communication) concluded that digital technology working in the Time Division Multiple Access (TDMA) mode would provide the optimum solution for the future system.

  • Page 5: Item Name And Use

    This product consists of a handset, battery pack, and Travel charger. Characteristics 1) All the active devices of GB210 are made of semiconductors to ensure excellent performance and semi-permanent use. 2) Surface mounting device (SMD) is used to ensure high reliability, compactness and lightness.

  • Page 6: Section 2 Electrical Specifications

    GB210 Service Manual Section 2. Electrical Specifications 2.1 General GSM 850 / DCS 1800/PCS1900 Mobile Transmit Frequency[MHz] 824 ~ 849 /1710 ~ 1785/ 1850 ~ 1910 Mobile Receive Frequency[MHz] 869 ~ 894 /1805 ~ 1880/ 1930 ~ 1990 Multiplex number...

  • Page 7: Section 3 Operation

    GB210 Service Manual Section 3 Operation 3.1 Name of each part PANTECH R&D CONFIDENTIAL...

  • Page 8: Display

    GB210 Service Manual 3.2 Display(Dual LCD) Parameter Projected Actual (MAIN LCD) Display 1.8’ 65K CSTN Transmissive (Resolution : 128 * 160 ) European Character : (font size : 8×14) 11 lines x 16 characters Chinese Character : (font size : 14×15) 10 lines × 9...

  • Page 9: Section 4 Theory Of Operation

    GB210 Service Manual Section 4. Theory of Operation 4.1 Logic Section 4.1.1 DC Distribution and Regulation Part Applying battery voltage and pressing “END” key on the key pad short-circuits “Ground” and “_ PowerON”. AD6535(U102) control that power manage regarding power on/off in handset Pressing POWERKEY on the key pad is active on the handset.

  • Page 10: Summary

    GB210 Service Manual 4.1.2.1 Summary The logic part consists of AD6526 ARM7 microprocessor-combined GSM-ASIC, COMBO(flash ROM & SRAM), AD6535 VBC Chip. AD6526 is GSM-ASIC chipset implemented for GSM terminal’s system control and baseband digital signal processing. Major parts used in the logic part are as follows:...

  • Page 11: Baseband Digital Signal Processing

    GB210 Service Manual 4.1.2.2 Baseband Digital Signal Processing AD6526 is a GSM core device containing ARM7 CPU core. AD6535 is 148 pin BGA package, consisting of terminal chips. The function and characteristics of clock are as follows: 1) Complete single chip GSM Processor 2) Channel codec sub-system •...
  • Page 12 GB210 Service Manual ☞ Configuration by Function of AD6526 1 Microprocessor Core AD6526 has a built-in ARM7 microprocessor core, including microprocessor interrupt controller, timer/counter, and DMA controller. And besides, 32bit data path is included, and up to 8Mbyte addressing is enabled and can be extended up to 16Mbyte. Although external clock should be provided to operate the microprocessor, this core uses 13MHz VCTCXO to provide clock.

  • Page 13: Memory Part

    GB210 Service Manual AGC-end on transmit/receive paths in the RF part. 1) Transmitter Interface: This transmits TX_AGC signal to Tx AGC amplifier to adjust transmit power level and sends Ramp_DAC signal to the RF part to control power amplifier. 2) Receiver Interface: This transmits RX_AGC signal to Rx AGC amp.

  • Page 14: Notification Part

    GB210 Service Manual task in it. 3 Key Tone Generation All alert signals are generated by the DSP and output to the EVBC. These alert can be used for the earpiece. 4.1.4 Notification Part The notification of incoming call is given by melody, vibrator, and 3-Color LED.

  • Page 15: Radio Transceiver Section

    GB210 Service Manual 4.2 Radio Transceiver Section Fig.4-1. RF Transceiver block diagram The GB210’s RF Transceiver, which is AEROI(SI4205) transceiver is the industry’s most integrated RF front end for multi-band GSM/GPRS digital cellular handsets and wireless data modems. The highly integrated solution eliminates the IF SAW filter, external low noise amplifiers (LNAs) for three bands, transmit and RF voltage controlled oscillator (VCO) modules, and more than 70 other discrete components found in conventional designs.

  • Page 16: Dc Distribution And Regulation Part

    GB210 Service Manual Fig.4-2. Top view of RF Transceiver PCB Layout 4.2.1 DC Distribution and Regulation Part The battery voltage, in return, is applied to the logic part and RF part via LDO(Low Drop-Out) regulator. As several LDO regulators are used, power can be supplied for each necessary part efficiently.
  • Page 17 GB210 Service Manual Table 4-1. Pin Description of Si4205-BM PANTECH R&D CONFIDENTIAL...

  • Page 18: Receive Section

    4.2.3.1 An Overview of Receive section Fig.4-6. Receiver block diagram GB210’s Aero I transceiver uses a low-IF receiver architecture which allows for the on-chip integration of the channel selection filters, eliminating the external RF image reject filters and the IF SAW filter required in conventional superheterodyne architectures.

  • Page 19: Receiver Part

    GB210 Service Manual final channelization filter is in the baseband chip. After channel selection, the digital output is scaled with a digital PGA, which is controlled with the DGAIN bits. The LNAG, LNAC, AGAIN and DGAIN bits must be set to provide a constant amplitude signal to the baseband receive inputs.

  • Page 20: Transmit Section

    GB210 Service Manual 4.2.4 Transmit Section 4.2.4.1 An Overview of Transmit Section Fig.4-8. Transmitter block diagram The transmit (TX) section consists of an I/Q baseband upconverter, an offset phase-locked loop (OPLL) and two output buffers that can drive external power amplifiers (U701), one for the GSM 850 (824 to 849 MHz) and E-GSM 900 (880 to 915 MHz) bands and one for the DCS 1800 (1710 to 1785 MHz) and PCS 1900 (1850 to 1910 MHz) bands.

  • Page 21: Transmitter Part

    GB210 Service Manual 4.2.4.2 Transmitter Part A. 5dB attenuator, 6dB attenuator : Z706, Z705 These passive components are adopted for PAM to operate in a stable output power. B. FEM(Front End Module / built in LPF): U750 These filters pass through the signals of which frequency band of 824~849MHz,...

  • Page 22: Offset Pll

    GB210 Service Manual 4.2.5 Offset PLL 4.2.5.1 An Overview of Offset PLL Fig.4-10. Si4205 Frequency Synthesizer Block Diagram The Aero I transceiver integrates two complete PLLs including VCOs, varactors, resonators, loop filters, reference and VCO dividers, and phase detectors. The RF PLL uses two multiplexed VCOs.

  • Page 23: Vc-Tcxo(Voltage Controlled Temperature Compensated Crystal Oscillator): V801

    GB210 Service Manual 4.2.5.2 VC-TCXO(Voltage Controlled Temperature Compensated Crystal Oscillator): V801 This is the mobile station’s reference frequency source. Its frequency is 13MHz, this signal is applied to Si4205(U710)_Pin8, AD6526(U101)_Pin L12 . Fig.4-11. Top view of VCTCXO part on the PCB artwork PANTECH R&D CONFIDENTIAL...

  • Page 24: Recommended Test Equipment

    GB210 Service Manual Section 5. Alignment Procedure 5.1 Recommended Test Equipment Model No. Description Maker Remark GSM Mobile Station 8960 Agilent Technologies Test Set 8593E Spectrum Analyzer Hewlett Packard TDS 3054B Oscilloscope Tektronix FLUKE 87 Digital Multimeter Fluke E3630A DC Power Supply...

  • Page 25: Section 5 Alignment Procedure

    GB210 Service Manual SECTION 6. Equipment Repair Procedure 6.1 no power on with battery applied 6.1.1 Power CHECK 1. Check battery power : 3.5V~4.2V. 2. Check to see if U102.C15 pin voltage is same with battery power : CP100 CP100 PANTECH R&D CONFIDENTIAL...

  • Page 26: No Power On With Battery Applied

    GB210 Service Manual 3. Check to see if Q101_ 5.6 pin is same with battery power : CP101 CP101 CP101 PANTECH R&D CONFIDENTIAL...
  • Page 27 GB210 Service Manual 4. Check to see if U102. A4,B4.T2,T3,P1,N1,and T7 pin is 2.8V, 2.8V,1.8V and 1.95V : CP102 CP102 CP102 PANTECH R&D CONFIDENTIAL...
  • Page 28 GB210 Service Manual 5. Check to see if U102_T14 pin becomes to 0V : CP103 Pressing “END” key to turn on equipment. CP103 PANTECH R&D CONFIDENTIAL...

  • Page 29: Oscillation Check

    GB210 Service Manual 6.1.2 Oscillation CHECK 1. Check to see if U101_ A3 and B3 pin is oscillated(32.768KHz) : CP104 Check R118 and then replace X1 CP104 CP104 2. Check to see if R120.1 pin Master Clock(13MHz). : CP105 Check C183.2 pin and then check the PCB pattern, soldering...

  • Page 30: Keypad Led Not In Operation

    GB210 Service Manual 6.1.3 KEYPAD LED Not in Operation 1. Check to see if Q102,Q103 are around 2.8V : CP110 Check Q102, Q103 and then replace those. 2. Check to see if R171,R172,R173,R174,R175,R180 are same with battery voltage : CP111 Check the PCB pattern between battery and the resistors.

  • Page 31: Status Led

    GB210 Service Manual 6.1.4 Status LED During Operating Mode Status LED Should be blinking during Operating Mode(Folder open, games). 1. Check to see if Q542_2,5 pin voltage is around 2.8V : CP115 Replace the Transistor. During Incoming Call Mode. Status LED should be blinking during Incoming Call 1.

  • Page 32: Audio Part ( Earpiece, Hands-Free Earphone, Microphone, Hands-Free Mic )

    GB210 Service Manual 6.2 Audio Part ( Earpiece, Hands-free Earphone, Microphone, Hands-free Mic ) 6.2.1 No receiving tone heard ( Ear-piece ) 1. Check to see if U112.5 is 2.5V : CP116 2. Check to see if U113.1 is around 1.2V : CP117 Set to HP8922M to connect a call and then set to 1kHz.
  • Page 33 GB210 Service Manual CP117 CP116 PANTECH R&D CONFIDENTIAL...

  • Page 34: Sidetone Not Transmitted (Mic)

    GB210 Service Manual 6.2.2 Side Tone Not transmitted (Mic.) 1. Check to see if Mic + pin is around 1.8V : CP125 Check that R470, R152, C184 and C155 is cold solder, broken, short to the other PCB pattern or not If you find out any defective part, you replace it.
  • Page 35 GB210 Service Manual CP125 CP126 CP127 PANTECH R&D CONFIDENTIAL...

  • Page 36: Hook Switch Not Working

    GB210 Service Manual 6.2.4 Hook Switch not working 1. Check to see if U113.5 pin is 2.8V : CP129 2. Check to see if U113.1 pin is around 0.12V during pressing Hook Switch : CP130 3. Check to see if U113.3 pin is around 0.21V : CP131...

  • Page 37: Melody Not Ringing

    GB210 Service Manual 6.2.5 Melody not ringing 1. Check to see if U104.32, 7 pin is 2.8V : CP133 2. Check SPK_L,SPK_R for waveform : CP134 Replacd SPK CP133 CP134 CP134 CP133 PANTECH R&D CONFIDENTIAL...

  • Page 38: Vibrator Not Working

    GB210 Service Manual 6.2.6 Vibrator not working 1. Check to see if Q103.1 pin is 2.8V : CP137 Check to see Q103 cold solder, broken, short to the other PCB pattern or not If you find out any defect, you replace it 2.

  • Page 39: Sim Card Part

    GB210 Service Manual 6.3 SIM card part 6.3.1 SIM error Check to see if J103.1 pin is around 2.85V : CP140 If you find out any defect, you replace it 2.Check to see J103.2, 3, 6 for wave form : CP142...

  • Page 40: Charger Part

    GB210 Service Manual 6.4 Charger part 6.4.1 Charging error Insert adaptor into I/O jack. Check to see if U102.A5 pin is 5.2V : CP143 Check to see J101.23, 24 pin cold solder, broken, short to the other PCB pattern or...
  • Page 41 GB210 Service Manual CP144 CP143 CP145 CP146 CP144 PANTECH R&D CONFIDENTIAL...

  • Page 42: Camera Sensor Part

    GB210 Service Manual 6.5 Camera Sensor Part 6.5.1 Camera Preview error Check to see if U580.1 pin(On LCD Module) is around 2.8V : CP142 2. Check to see if U580.4 pin(On LCD Module) is around 2.5V CP143 3. Check to see if U561.3 pin(On LCD Module) is oscillated(27Mhz): CP144...
  • Page 43 GB210 Service Manual CP142 CP143 CP144 PANTECH R&D CONFIDENTIAL...

  • Page 44: Rf Part

    GB210 Service Manual 6.6 RF Part 6.6.1 Test conditions 1. Test condition 1 : VBAT = 3.8V during all tests 2. Test condition 2 : Traffic channel :GSM850 Band Tx mode Ch190 Power Level : 13 3. Test condition 3 : Traffic channel : DCS Band...

  • Page 45: Power Supply Check Point

    GB210 Service Manual 6.6.2 Power Supply Check Point _ TEST CONDITION 1 Test Step Typical Value Condition Checking Point point Check route connection : VBAT U907 3.8V 2, 3, 4, 5,6 YES : Pass Pin#1 NO : Power Supply Check Check route connection : VCC_2.8V...
  • Page 46 GB210 Service Manual Fig.6-2 Power Supply Schematic U907 Regulator PANTECH R&D CONFIDENTIAL...

  • Page 47: Power Amplifier Module

    GB210 Service Manual 6.6.3 Power Amplifier Module _ TEST CONDITION 2,3,4,5 Step Test point Typical Value Condition Checking Point Check route connection : VBAT U720 YES : Pass 3.8V 2,3,6 Pin #4 NO : Power Suppely Check Test Condition1 Check...
  • Page 48 GB210 Service Manual Fig.6-4. Power Amplifier’s Test Point on the schematic PANTECH R&D CONFIDENTIAL...

  • Page 49: Vctcxo

    GB210 Service Manual 6.6.4 VCTCXO _ TEST CONDITION 6 Test Step Typical Value Condition Reaction to Abnormality point Check route connection : AFC V801 2, 3, 4, 5, 1.4V ±0.25V YES : Pass Pin#1 NO : U 1 V801 2, 3, 4, 5, 2.8V...

  • Page 50: Front End Module

    GB210 Service Manual 6.6.5 Front End Module Step Test point Typical Value Condition Check point When Pin#11 is Logic High and Pin#2 U750 2.6V is Logic Low the mode is GSM-850 Pin#11 band. During Pin#9 and Pin#12 are Logic U750 2.6V...
  • Page 51 GB210 Service Manual Fig. 6-8 Antenna Switch Module PCB Layout PANTECH R&D CONFIDENTIAL...

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