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Pantech G310, Service Manual

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G310 Service Manual  
                                                                                                                                                                                  

 

PANTECH  

R&D 

CONFIDENTIAL 

38

 

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 : CP125 

NO   Check that R102, C181 and R104 is cold solder, broken, short to the other  

PCB pattern or not  

      If you find out any defective part, you replace it.  

Set to HP8922M to connect a call and then set to 1kHz with Echo audio mode. 

2. Check U102.J10 (C132) pins for wave form : CP126 

       NO  Replace MIC  

 

6.2.4 Side Tone Not transmitted ( Hands-free Mic. ) 

Repeat 6-2-2 No receiving tone heard.( Hands-free Earphone ). 

1. Check to see if U102. H10 (C130) pin is 2.5V : CP127 

NO   Check that R107, R108, C150 and C151 is cold solder,broken,short to the other  

                   PCB pattern or not. 

      If you find out any defective part, you replace it.  

Set to HP8922M to connect a call and then set to 1kHz with Echo audio mode. 

3. Check U102. H10 (C130) pins for wave form : CP127 

NO   Replace Handsfree Mic. 

 

 

 
 
 
 
 
 
 

 

 

CP125 

CP126 

CP127 

CP125 

Summary of Contents for G310

Page 1: ...0 G310 Service Manual GSM Cellular Phone Pantech Co Ltd Korea September 8 2003 1st Edition For Use by Authorized Service Maintenance Personal Only Documents to Receive This Addendum G310 Maintenance R...

Page 2: ...1 AN OVERVIEW OF RECEIVE SECTION 17 4 2 3 2 RECEIVER PART 18 4 2 4 TRANSMIT SECTION 19 4 2 4 1 AN OVERVIEW OF TRANSMIT SECTION 19 4 2 4 2 TRANSMITTER PART 20 4 2 5 OFFSET PLL 21 4 2 5 1 AN OVERVIEW OF...

Page 3: ...40 6 2 7 VIBRATOR NOT WORKING 41 6 3 SIM CARD PART 42 6 3 1 SIM ERROR 42 6 4 CHARGER PART 43 6 4 1 CHARGING ERROR 43 6 5 RF PART 45 6 5 1 TEST CONDITIONS 45 6 5 2 POWER SUPPLY CHECK POINT 46 6 5 3 PO...

Page 4: ...xed or mobile network users as well as mobility management The MS and the BS subsystem communicate across the Um interface also known as radio link The specifications relating to MS are as follows TS...

Page 5: ...e are used appropriately to ensure its best performance This product consists of a handset battery pack and Travel charger 1 4 Characteristics 1 All the active devices of G310 are made of semiconducto...

Page 6: ...dBm Frequency Error 90Hz 180Hz Phase Error RMS 5 PEAK 20 Minimum Output Power 5 5 0 5 dBm Power Control 5 19 2 dB Step 0 15 2 dB Step Output RF Spectrum TS 100 910V6 2 0 Switching Transient TS 100 91...

Page 7: ...G310 Service Manual PANTECH R D CONFIDENTIAL 6 Section 3 Operation 3 1 Name of each part Antenna Two mode Speaker Display Screen Mic...

Page 8: ...4 European Character font size 16 16 4 lines x 8 characters Chinese Character font size 16 16 4 lines 6 characters Driver S1D10605D03E000 EPSON Module Dimen 31 6 W x 48 0 H x 4 86 D View size 18 1 W x...

Page 9: ...SM ASIC chipset implemented for GSM terminal s system control and baseband digital signal processing Major parts used in the logic part are as follows 1 AD6526 U101 ARM7 Processor Core GSM Signal Proc...

Page 10: ...as follows 1 Speech transcoding In full rate the DSP receives the speech data stream from VBC and encodes data from 104kbps to 13kbps Using algorithm is Regular Pulse Excitation with Long Term Predict...

Page 11: ...Speech Transcoding In full rate mode the DSP receive the speech data stream from the VBC and encodes data from 104kbps to 13kbps Using algorithm is Regular Pulse Exitation with Long Term Prediction a...

Page 12: ...lamp U101 Nos A10 A9 and C9 signal drives the lamp to flash 4 1 5 Key Pad Part To enable key operation to input information the key matrix is configured using strobe signal of KEYPADROW 0 4 and 5 inp...

Page 13: ...g 4 2 Top view of RF Transceiver PCB Layout The G310 s RF Transceiver which is AERO consists of the Si4200 GSM transceiver U710 Si4201 universal baseband interface U702 and Si4133T dual RF synthesizer...

Page 14: ...with a fully integrated transmit VCO The frequency synthesizer U601 includes integrated RF and IF VCO s Varactors and Loop filters The unique integer N PLL architecture used in the Si4133T U601 produ...

Page 15: ...G310 Service Manual PANTECH R D CONFIDENTIAL 14 4 2 2 Transciever pin description Fig 4 3 Top View of Si4200DB BM Table 4 1 Pin Description of Si4200DB BM...

Page 16: ...G310 Service Manual PANTECH R D CONFIDENTIAL 15 Fig 4 4 Top View of Si4201 BM Table 4 2 Pin Description of Si4201 BM...

Page 17: ...G310 Service Manual PANTECH R D CONFIDENTIAL 16 Fig 4 5 Top View of Si4133T BM Table 4 3 Pin Description of Si4133T BM...

Page 18: ...PCS input supports the PCS 1900 1930 1990 MHz A quadrature image reject mixer downconverts the RF signal to a 100 kHz intermediate frequency IF with the RFLO from the Si4133T frequency synthesizer Th...

Page 19: ...ency band that is 897 5MHz 17 5MHz for EGSM bands 1880 2 30 MHz for PCS bands from the power amplifier and transmits it to the antenna The maximum insertion loss is about 0 8 dB for the receiving band...

Page 20: ...ls with the IFLO to generate a SSB IF signal which is fitered and usesd as the reference input to the OPLL The Si4133T generates the IFLO frequency between 766 and 896 MHz The IFLO is divided by two t...

Page 21: ...equencies C Power AMP Module PAM Z710 This device amplifies signals ahead of transmiting them through the antenna to provide a sufficient RF power It has amplification factor of 28dB and efficiency of...

Page 22: ...varactors resonators loop filters reference and VCO dividers and phase detectors Differential outputs for the IF and RF PLLs are provided for direct connection to the Si4200 transceiver IC The RF PLL...

Page 23: ...rature Compensated Crystal Oscillator V801 This is the mobile station s reference frequency source Its frequency is 13MHz this signal is applied to Si4133T U601 _pin7 Si4201 U702 _ pin7 and AD6526 U10...

Page 24: ...Maker Remark 8960 GSM Mobile Station Test Set Agilent Technologies 8593E Spectrum Analyzer Hewlett Packard TDS 340A Oscilloscope Tektronix FLUKE 87 Digital Multimeter Fluke E3630A DC Power Supply Hew...

Page 25: ...TIAL 24 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 U103 22 pin voltage is same with battery power CP1...

Page 26: ...G310 Service Manual PANTECH R D CONFIDENTIAL 25 3 Check to see if Q101 7 8 and 9 pin is same with battery power CP101 CP101 CP101...

Page 27: ...10 Service Manual PANTECH R D CONFIDENTIAL 26 4 Check to see if U106 1 pin is same with battery power CP102 5 Check to see if U103 21 20 23 and 3 pin is 1 8V 2 8V 2 55V and 1 95V CP103 CP103 CP102 CP1...

Page 28: ...l PANTECH R D CONFIDENTIAL 27 6 Check to see if U103 30 pin becomes to 0V CP104 Pressing END key to turn on equipment 7 Check to see if C115 and C116 is 1 8V C118 C119 and C120pin is 2 45V CP105 CP103...

Page 29: ...G310 Service Manual PANTECH R D CONFIDENTIAL 28 8 Check to see if U104 39 12 pin U117 5pin and U122 5 pin is 2 8V CP106 CP106 CP105 CP106...

Page 30: ...G310 Service Manual PANTECH R D CONFIDENTIAL 29 9 Check to see if U106 5 pin and U105 7 32 pin is 2 8V CP107 CP107 CP107...

Page 31: ...tion CHECK 1 Check to see if U101 No A3 and B3 pin is oscillated 32 768KHz CP108 NO Check R138 and then replace X101 2 Check to see if U107 4 pin Master Clock 13MHz CP109 NO Check U107 No 1 2 pin and...

Page 32: ...nd 2 8V duty 80 256Hz CP110 NO Check R421 422 Q401 402 403 and 404 and then replace those 2 Check to see if R401 R410 are same with battery voltage CP111 NO Check the PCB pattern between battery and t...

Page 33: ...G310 Service Manual PANTECH R D CONFIDENTIAL 32 CP110 CP111 CP112...

Page 34: ...PANTECH R D CONFIDENTIAL 33 6 1 4 LCD Backlight Not in Operation White 1 Check to see if U201 2 and 10 pins are 2 8V CP113 2 Check to see if U201 15 pin C204 is over 3V CP114 NO Replace the U201 CP11...

Page 35: ...ashing during Stand By Blue 1 Check to see if Q202 2 pin voltage is around 2 8V CP115 NO Replace the Transistors During Incoming Call Mode Status LED should be blinking during Incoming Call all colors...

Page 36: ...ns Ear Signal for waveform CP119 NO Replace U102 4 Check to see if U115 B4 C231 pin is battery voltage CP120 NO Replace U115 5 Check U115 A3 and C3 R130 and R173 pin for waveform CP121 NO Replace U115...

Page 37: ...G310 Service Manual PANTECH R D CONFIDENTIAL 36 CP117 CP118 CP119 CP124 CP120 CP121...

Page 38: ...G310 Service Manual PANTECH R D CONFIDENTIAL 37 CP122 CP123 CP117 CP118 CP119 CP120 CP121 Top Side CP124 CP122 CP123...

Page 39: ...set to 1kHz with Echo audio mode 2 Check U102 J10 C132 pins for wave form CP126 NO Replace MIC 6 2 4 Side Tone Not transmitted Hands free Mic Repeat 6 2 2 No receiving tone heard Hands free Earphone...

Page 40: ...11 3 pin is around 0 3V CP131 NO Check that R109 and R110 cold solder broken short to the other PCB pattern or not If you find out any defect you replace it 4 Check to see if U111 4 pin is around 0V w...

Page 41: ...if U105 15 is Vbat CP134 3 Check U105 12 13 and 14 pin for waveform CP135 NO Check that C163 R120 C164 R121 and R122 cold solder broken short to the other PCB pattern or not If you find out any defec...

Page 42: ...r broken short to the other PCB pattern or not If you find out any defect you replace it 2 Check to see Q105 3 is same with battery power CP138 NO Check to see Q105 and R160 cold solder broken short t...

Page 43: ...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 NO Check to see J103 R133 and...

Page 44: ...her PCB pattern or not CP144 If you find out any defect you replace it 2 Check to see U103 No 14 pin is low 0V CP145 NO Check to see U103 cold solder broken short to the other PCB pattern or not If yo...

Page 45: ...G310 Service Manual PANTECH R D CONFIDENTIAL 44 CP145 CP143 CP146 CP144...

Page 46: ...ition 2 Traffic channel EGSM Band Tx mode Ch62 Power Level 13 3 Test condition 3 Traffic channel PCS Band Tx mode Ch661 Power Level 10 4 Test condition 4 Traffic channel GSM Band Rx mode Ch62 Input po...

Page 47: ...1 3 8V 2 3 4 5 Check route connection VBAT 2 2 U907 Pin 5 2 8V 2 3 4 5 Check route connection VBAT 2 3 Z710 Pin 4 3 8V 2 3 4 5 Check route connection VBAT 2 4 Z710 Pin 5 2 8V 2 3 4 5 Check route conn...

Page 48: ...G310 Service Manual PANTECH R D CONFIDENTIAL 47 Typ 3 8V Typ 2 8V Fig 6 3 Z710 PAM s Power Check Point Typ 2 8V Typ 2 8V Fig 6 4 Z710 PAM s PCB Layout...

Page 49: ...n you can trace the guideline of PAM as follows Step Test point Typical Value Condition Checking Point 3 1 Z710 Pin 3 Logic High 2 3 Check route connection TXEN Logic High 3 5 3 2 Z710 Pin 2 Logic Low...

Page 50: ...G310 Service Manual PANTECH R D CONFIDENTIAL 49 STEP 3 2 Fig 6 6 PAM PCSSEL Test Point Circuit STEP 3 2 Fig 6 7 PAM TXONPA and PCSSEL Test Point on the PCB Layout...

Page 51: ...l Value Condition Reaction to Abnormality 4 1 V801 Pin 1 0 5V 2 5V 2 3 4 5 Check route connection AFC 4 2 V801 Pin 4 2 8V 2 3 4 5 Check route connection VTCXO STEP 4 1 STEP 4 2 Fig 6 8 VCTCXO Check Po...

Page 52: ...01 Pin 11 2 8V 2 5 2 Z701 Pin 2 2 8V 3 When Pin 11 is Logic High and Pin 2 is Logic Low the mode is EGSM band While Pin 2 is Logic High and Pin 11 is Logic Low the operating mode is PCS band STEP 5 2...

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