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Pantech G200 Service Manual

Gsm cellular phone
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G200 Service Manual
G200
G200 Service Manual
(GSM Cellular Phone)
Pantech Co., Ltd., Korea
January 19, 2008
st
1
Edition
For Use by Authorized Service/Maintenance Personal Only
Documents to Receive This Addendum:
G200 Maintenance/Repair/Operating Manual

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  • Page 1 G200 Service Manual G200 G200 Service Manual (GSM Cellular Phone) Pantech Co., Ltd., Korea January 19, 2008 Edition For Use by Authorized Service/Maintenance Personal Only Documents to Receive This Addendum: G200 Maintenance/Repair/Operating Manual...

  • Page 2: Table Of Contents

    G200 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 G200 Service Manual 6.2.6 M ......................40 ELODY INGING 6.2.7 VIBRATOR NOT WORKING …………………………………………………………………...…41 6.3 SIM CARD PART ……………………………………...…………………………………………….42 6.3.1 SIM ………………………………………………………………………………………….42 ERROR 6.4 CHARGER PART……………………………………………………………………………………..43 6.4.1 C ………………………………..…………………………………………………43 HARGING ERROR 6.5 RF PART…………….………………………………………………………………………………… 45 6.5.1 T ………………………………………………………………… …………………45 EST CONDITIONS 6.5.2 P...

  • Page 4: Section 1 Introduction

    G200 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 G200 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

    G200 Service Manual Section 2. Electrical Specifications 2.1 General E-GSM / DCS Band Mobile Transmit Frequency 880 MHz ~ 915 MHz/1710MHz ~ 1785MHz Mobile Receive Frequency 925 MHz ~ 960 MHz/1805MHz ~ 1880MHz The Number of Time Slot The Number of Channels...

  • Page 7: Section 3 Operation

    G200 Service Manual Section 3 Operation 3.1 Name of each part Antenna Sub LCD PANTECH R&D CONFIDENTIAL...

  • Page 8: Display

    G200 Service Manual Speaker& Earpiece Display Screen Navigation Key PANTECH R&D CONFIDENTIAL...

  • Page 9: Keypad

    G200 Service Manual 3.2 Display(Dual LCD) Parameter Projected Actual(MAIN LCD) Display Color TFT LCD with white LED back lighting 65536 colors European Character : (font size : 16×16) 6 lines x 16 characters Chinese Character : (font size : 16×16) 6 lines × 7...

  • Page 10: Section 4 Theory Of Operation

    G200 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”.ADP3522(U103)control that power manage regarding power on/off in handset Pressing POWERKEY on the key pad is active on the handset.
  • Page 11 G200 Service Manual ☞ Configuration by Function of AD6525 1 Microprocessor Core AD6525 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 12: Memory Part

    G200 Service Manual 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. to adjust receive path gain.

  • Page 13: Notification Part

    G200 Service Manual 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 7color-LED.

  • Page 14: Radio Transceiver Section

    4.2 Radio Transceiver Section Fig.4-1. RF Transceiver block diagram The G200’s RF Transceiver, which is AERO, consists of the Si4200 GSM transceiver (U710), Si4201 universal baseband interface (U702), and Si4133T dual RF synthesizer (U601). 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 60 other discrete components found in conventional designs.

  • Page 15: Dc Distribution And Regulation Part

    G200 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 16: Receive Section

    G200 Service Manual Table 4-1. Pin Description of Si4200DB-BM 4.2.3 Receiver Section 4.2.3.1 An Overview of Receive section Fig.4-6. Receiver block diagram PANTECH R&D CONFIDENTIAL...

  • Page 17: Receiver Part

    G200 Service Manual G200’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. Compared to a...
  • Page 18 G200 Service Manual is 942.5±17.5MHz for EGSM bands, 1842.5±37.5 MHz for DCS bands and transmits it to dual saw filter. The Tx filter passes through the output signals of frequency band that is 897.5MHz ±17.5MHz for EGSM bands, 1747.5 ±37.5 MHz for DCS bands from the power amplifier and transmits it to the antenna.

  • Page 19: Transmit Section

    G200 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 20: Transmitter Part

    G200 Service Manual 4.2.4.2 Transmitter Part A. 6 dB attenuator : Z705, Z706 These passive components are adopted for PAM to operate in a stable output power. B. ASM(Antenna Switch Module / built in LPF): Z701 These filters pass through the signals of which frequency band of 880~915MHz,...

  • Page 21: Offset Pll

    G200 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 22: Vc-Tcxo(Voltage Controlled Temperature Compensated Crystal Oscillator): V801

    G200 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, AD6525(U101) and ML2870(U105). Fig.4-11. Top view of VCTCXO part on the PCB artwork PANTECH R&D CONFIDENTIAL...

  • Page 23: Section 5 Alignment Procedure

    G200 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 340A Oscilloscope Tektronix FLUKE 87 Digital Multimeter Fluke E3630A DC Power Supply...

  • Page 24: Section 6 Equipment Repair Procedure

    G200 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. BATTERY PACK Terminal 2.Check to see if U103.22,19,2 pin voltage is same with battery power : CP100...
  • Page 25 G200 Service Manual 3. Check to see if Q101.7,8 and 9 pin is same with battery power : CP101 CP101 CP101 PANTECH R&D CONFIDENTIAL...
  • Page 26 G200 Service Manual Check to see if U106 .1 pin is same with battery power : CP102 CP102 CP102 5. Check to see if U103. 21,20.23 and 3 pin is 1.8V, 2.8V, 2.55V_A,1.95V_RTC : CP103 CP103 PANTECH R&D CONFIDENTIAL...
  • Page 27 G200 Service Manual CP103 CP104 6. Check to see if U103.30 pin becomes to 0V : CP104 Pressing “END” key to turn on equipment. CP104 7. Check to see if C106~109,C111~C114,C100~103 is 2.8V_M, 1.8V_D : CP105 CP105 PANTECH R&D CONFIDENTIAL...
  • Page 28 G200 Service Manual CP105 8. Check to see if U104.G4,K5,D5 pin , U108.8pin and U109.5 pin is 2.8V_M : CP106 CP106 PANTECH R&D CONFIDENTIAL...

  • Page 29: Oscillation Check

    G200 Service Manual CP106 9. Check to see if U106.5 pin and J103.28 pin is 2.8V_EXT : CP107 CP107 CP107 6.1.2 Oscillation CHECK 1. Check to see if U101 No. A3 and B3 pin is oscillated(32.768KHz) : CP108 2. NO...

  • Page 30: Keypad Led Not In Operation( Blue )

    G200 Service Manual CP108 2. Check to see if U107.4 pin Master Clock(13MHz). : CP109 Check U107 No. 1.2 pin and then check the PCB pattern, soldering CP109 CP109 6.1.3 KEYPAD LED Not in Operation( blue ) 1.Check to see if R129. 1 pin is around 2.8V(duty:80%, 256Hz) : CP110 Check R129 and Q102 and then replace those 2.Check to see if R123.124.125.126.127.128 is same with battery voltage : CP111...

  • Page 31: Lcd

    G200 Service Manual CP110 CP112 CP111 CP111 CP111 CP112 CP110 6.1.4 LCD Backlight Not in Operation(White) 1. Check to see if J103.9 pin is around 2.8V(duty:80%, 256Hz) : CP113 Check J103 and resoldering CP113 PANTECH R&D CONFIDENTIAL...

  • Page 32: Power Indicated Led & Status Led

    G200 Service Manual CP113 6.1.5 Power indicated LED & Status LED During Stand By Mode Status LED1should be flashing during Stand By(Blue). 1.Check to see if J103.28pin voltage is around 2.8V : CP114 2.Check to see if TR401,402 is well operated : CP116 Replace the Transistors.

  • Page 33: Audio Part ( Earpiece, Hands-Free Earphone, Microphone, Hands-Free Mic )

    G200 Service Manual CP114 CP115 CP117 CP116 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 U102 Nos. F10.A9 and J8(C118.C119.C120) is 2.55V_A : CP118 2.Check to see if U102 No. A7(C124) is around 1.2V : CP119 Set to HP8922M to connect a call and then set to 1Khz.
  • Page 34 G200 Service Manual 6.2.2 No Receivng tone heard ( Hands-free Earphone ) 1.Check to see if U102 Nos. F10.A9 and J8(C118. C119. C120) is 2.55V_A: CP118 2.Check to see if 102 No. A7(C124) is around 1.2V : CP119 3.Check to see if U101 No. B11(V156) is around 0V: CP123 Check to see J106 : CP124 Set to HP8922M to connect a call and then set to 1Khz.
  • Page 35 G200 Service Manual CP124 CP123 CP122 CP119 CP120 CP118 CP118 CP123 CP124 PANTECH R&D CONFIDENTIAL...

  • Page 36: Sidetone Not Transmitted (Earpiece )

    G200 Service Manual 6.2.3 Side Tone Not transmitted ( Ear-piece ) Repeat 6-2-1 No receiving tone heard.( Ear-piece ) 1.Check to see if Mic + pin is around 1.8V : CP126 Check that R104,C181 is cold solder,broken,short to the other PCB pattern or not If you find out any defective part, you replace it.

  • Page 37: Hook Switch Not Working

    G200 Service Manual CP127 CP129 CP126` 6.2.5 Hook Switch not working 1.Check to see if U111 No.5 is 2.8V : CP130 2.Check to see if U111 No.1 is 0V during pressing Hook Switch : CP131 3.Check to see if U111 No.3 is around 0.3V : CP132...

  • Page 38: Melody Not Ringing

    G200 Service Manual CP132 CP130 CP133 CP131 CP130 CP131 CP132 CP133 6.2.6 Melody not ringing 1.Check to see if U105.2 is 2.8V_A : CP134 2.Check to see if U116.A3 is Vbat : CP135 3.Check U116.C2,C3 pin for wave form : CP136...

  • Page 39: Vibrator Not Working

    G200 Service Manual Replacd SPK CP135 CP136 CP134 CP137 CP134 CP135 CP137 CP136` 6.2.7 Vibrator not working 1. Check to see if U101 No. C5(Q105.1) pin is 2.8V(duty:70%, 70Hz) : CP138 Check to see Q105 cold solder,broken,short to the other PCB pattern or not If you find out any defect, you replace it 2.
  • Page 40 G200 Service Manual CP139 CP138 CP138 CP139 PANTECH R&D CONFIDENTIAL...

  • Page 41: Sim Error

    G200 Service Manual 6.3 SIM card part 6.3.1 SIM error Check to see if J103 No. 1 pin is 2.85V : CP140 Check to see U103.18 pin cold solder,broken,short to the other PCB pattern or not : CP141 If you find out any defect, you replace it 2.Check to see J103.2.3.6 for wave form : CP142...

  • Page 42: Charger Part

    G200 Service Manual 6.4 Charger part 6.4.1 Charging error Insert adaptor into I/O jack. Check to see if U103. 7 pin is 5.2V : CP143 Check to see J101.23 .24 pin and D116 cold solder,broken,short to the other PCB pattern or not : CP144 If you find out any defect, you replace it 2.Check to see U103.14 pin is low(0V) : CP145...
  • Page 43 G200 Service Manual CP145 CP143 CP146 CP144 PANTECH R&D CONFIDENTIAL...

  • Page 44: Rf Part

    G200 Service Manual 6.5 RF Part 6.5.1 Test conditions 1. Test condition 1 : VBAT = 3.8V during all tests 2. Test condition 2 : Traffic channel :EGSM Band Tx mode Ch62 Power Level : 13 3. Test condition 3 : Traffic channel : DCS Band...

  • Page 45: Power Supply Check Point

    G200 Service Manual 6.5.2 Power Supply Check Point Test Step Typical Value Condition Checking Point point U907 3.8V 2, 3, 4, 5 Check route connection : VBAT Pin#1 U907 2.8V 2, 3, 4, 5 Check route connection : VBAT Pin#5 U701 3.8V...
  • Page 46 G200 Service Manual Fig.6-3 Z710 PAM’s Power Check Point Fig.6-4 Z710 PAM’s PCB Layout PANTECH R&D CONFIDENTIAL...

  • Page 47: Power Amplifier Module

    G200 Service Manual 6.5.3 Power Amplifier Module - First check the Power Supply Check point following 6.3.2. Then you can trace the guideline of PAM as follows . Test Step Typical Value Condition Checking Point point Z710 Logic High 2, 3...
  • Page 48 G200 Service Manual STEP 3-2 Fig.6-6. PAM DCSSEL Test Point Circuit Fig.6-7. PAM TXEN and DCSSEL Test Point on the PCB Layout PANTECH R&D CONFIDENTIAL...

  • Page 49: Vctcxo

    G200 Service Manual 6.5.4 VCTCXO Test Step Typical Value Condition Reaction to Abnormality point V801 0.5V ~ 2.5V 2, 3, 4, 5 Check route connection : AFC Pin#1 V801 2.8V 2, 3, 4, 5 Check route connection : VTCXO Pin#4 Fig.6-8.

  • Page 50: Antenna Switch Module

    G200 Service Manual 6.5.5 Antenna Switch Module Step Test point Typical Value Condition Check point When Pin#11 is Logic High and Pin#2 Z701 2.6V is Logic Low the mode is EGSM band. Pin#11 While Pin#2 is Logic High and Pin#11 Z701 2.6V...

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