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PG-1400 Service Manual

CP114

6.2.2 No Receivng tone heard ( Hands-free Earphone )

1. Check to see if U101.J16 (R619) is around 0V:

NO

Æ

Check to see J510 : CP115

Set to HP8922M to connect a call and then set to 1kHz.

2. Check C639 pin for waveform : CP116

3, Check Hands-free Earphone

CP116

CP115

CP115

CP116

28

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Summary of Contents for PG-1400

Page 1: ...0 PG 1400 Service Manual GSM Cellular Phone Pantech Co Ltd Korea September 5 2005 1st Edition For Use by Authorized Service Maintenance Personal Only Documents to Receive This Addendum PG 1400 Mainten...

Page 2: ...TION PART 13 4 2 3 RECEIVER SECTION 13 4 2 3 1 AN OVERVIEW OF RECEIVE SECTION 13 4 2 3 2 RECEIVER PART 14 4 2 4 TRANSMIT SECTION 15 4 2 4 1 AN OVERVIEW OF TRANSMIT SECTION 15 4 2 4 2 TRANSMITTER PART...

Page 3: ...7 6 5 2 POWER SUPPLY CHECK POINT 38 6 5 3 POWER AMPLIFIER MODULE 40 6 5 4 VC TCXO 42 6 5 5 ANTENNA SWITCH MODULE 43 6 6 FM RADIO MODULE 43 6 6 1 CHECK POINT POWER PART IN THE FM RADIO MODE 43 6 6 2 CH...

Page 4: ...between the mobile and other fixed 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 re...

Page 5: ...le data rate feature 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 1400 are m...

Page 6: ...z 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 910V6 2 0 Intermodulation attenu...

Page 7: ...eration 3 1 Name of each part Receiver Hall 1 5 65K CSTN 128 128 pixels 5 Way Menu Joystick Key Soft Key 2 Soft Key 1 End Power on off Clear Key Numeric Keypad MIC Hall Volume up down Speaker Hall Cam...

Page 8: ...eypad Market Goal Projected Actual Comments English Keypad 0 9 Send Color End Pwr Color Up Down WAP Soft1 Soft2 CLR Camera Key Vib Mode Key Auto Lock 0 Key international 2 Volume Keys 0 9 Send Color E...

Page 9: ...mplemented for GSM terminal s system control and baseband digital signal processing Major parts used in the logic part are as follows 1 AD6527 U101 ARM7 Processor Core DBB GSM Signal Processing ASIC 2...

Page 10: ...de consisting of speech transcoding and Channel equalization 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...

Page 11: ...s Additional purpose inputs and outputs are available under SW control 8 Speech Transcoding In full rate mode the DSP receive the speech data stream from the ABB and encodes data from 104kbps to 13kbp...

Page 12: ...r data is stored in flash memory U509 And generated by K18 GPIO_3 pin 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...

Page 13: ...minals The receive section uses a digital low IF architecture that avoids the difficulties associated with direct conversion while delivering higher performance lower solution cost and reduced complex...

Page 14: ...e section Fig 4 6 Receiver block diagram The PG 1400 s Aero II transceiver uses a digital low IF receiver architecture that allows for the on chip integration of the channel selection filters eliminat...

Page 15: ...BIP BIN BQP and BQN pins to interface to standard analog input baseband ICs The receive DACs are updated at 1 083 MHz and have a first order reconstruction filter with a 1 MHz bandwidth No special pr...

Page 16: ...aseband signals to an intermediate frequency IF that is filtered and which is used as the reference input to the OPLL The OPLL consists of a feedback mixer a phase detector a loop filter and a fully i...

Page 17: ...ated frequencies C Power AMP Module PAM 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...

Page 18: ...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 Hewlett Packard Other...

Page 19: ...quipment 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 Gnd Terminal 2 Check to see if C202 1 or C205 pin voltage is same with bat...

Page 20: ...PG 1400 Service Manual CP100 3 Check to see if U408 5 6 and R221 pin is same with battery power CP101 CP101 19 PANTECH...

Page 21: ...PG 1400 Service Manual CP101 20 PANTECH...

Page 22: ...PG 1400 Service Manual 4 Check to see if U201 and C224 C225 C227 C229 C232 C653 C654 pin is 2 8V_EXT 2 8V_MEM 1 8V_RTC 1 8V_D VMIC VTCXO VSIM CP102 CP102 CP102 21 PANTECH...

Page 23: ...l 6 Check to see if U201 T14 pin becomes to 0V CP103 Pressing END key to turn on equipment CP103 7 Check to see if C101 C102 C105 C106 C108 C111 C112 C113 C114 is 1 8V_D 2 8V_EXT VSIM 1 8V_RTC CP104 C...

Page 24: ...PG 1400 Service Manual 8 Check to see if U509 and C132 C131 is 2 8V_MEM CP105 CP105 CP105 23 PANTECH...

Page 25: ...eck to see if U101 No E9 and C9 pin is oscillated 32 768KHz CP106 NO Check R132 and then replace X101 CP106 CP106 2 Check to see if U101 N10 pin Master Clock 13MHz CP107 NO Check R133 C126 pin and the...

Page 26: ...ice Manual CP107 6 1 3 KEYPAD LED Not in Operation 1 Check to see R10 R11 R12 R13 R14 R15 R19 R20 CP110 NO Replace the resistors 2 Check R16 signal control PWM CP111 3 Check Q1 CP110 CP111 CP111 CP110...

Page 27: ...PG 1400 Service Manual CP110 6 1 4 LCD Backlight Not in Operation White 1 Check to see if U101 A11 or R684 R685 pins are controlled GPIO 2 8V CP112 CP112 CP112 26 PANTECH...

Page 28: ...hone Hands free Mic 6 2 1 No receiving tone heard Ear piece 1 BEEP TONE Check U201 J15 and K15 C208 C209 pins Ear Signal for waveform CP113 NO Replace U201 2 VOICE BELL TONE Check U301 17 18 and C675...

Page 29: ...heard Hands free Earphone 1 Check to see if U101 J16 R619 is around 0V NO Check to see J510 CP115 Set to HP8922M to connect a call and then set to 1kHz 2 Check C639 pin for waveform CP116 3 Check Han...

Page 30: ...around 1 5V CP117 NO Check that R677 C210 C211 R206 and R205 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...

Page 31: ...Check to see if R218 pin is 2 5V CP119 NO Check that C222 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...

Page 32: ...4V CP120 2 Check to see if Q2 1 pin is 0V during pressing Hook Switch CP120 3 Check to see if U2 3 pin is around 0V when you press Hook Switch CP120 NO Check that U405 cold solder broken short to the...

Page 33: ...heck to see if C302 TC300 is 2 8 V CP122 3 Check U301 12 13 14 pin for waveform CP123 NO Check that C306 R301 R302 C307and R303 cold solder broken short to the other PCB pattern or not Check U301 17 1...

Page 34: ...1 Check to see if R683 pin is 2 8V CP124 NO Check to see R683cold solder broken short to the other PCB pattern or not If you find out any defect you replace it 2 Check to see Vibrator If you find out...

Page 35: ...C658 pin cold solder broken short to the other PCB pattern or not If you find out any defect you replace it 2 Check to see J508 2 3 6 R116 R117 R118 for wave form CP127 NO Check to see J508 R116 cold...

Page 36: ...NO Check to see CN1 23 24 I O connector pin and U524 cold solder broken short to the other PCB pattern or not If you find out any defect you replace it 2 Check to see U408 No 1 2 pin is 5 2V CP129 NO...

Page 37: ...PG 1400 Service Manual CP129 CP129 CP128 36 PANTECH...

Page 38: ...4 Traffic channel GSM900 Band Rx mode Ch62 Input power 70dBm 5 Test condition 5 Traffic channel DCS Band Rx mode Ch698 Input power 70dBm 6 RF power values are measured using 50 coaxial cable 6 5 2 Pow...

Page 39: ...PG 1400 Service Manual Step 2 2 Step 2 1 Fig 6 1 U513 Regulator Power Supply Schematic Step 2 1 Step 2 2 Fig 6 2 U513 Regulator Power Supply PCB Layout 38 PANTECH...

Page 40: ...PG 1400 Service Manual Step 2 3 Fig 6 3 U512 PAM s Power Check Point Step 2 3 Fig 6 4 U512 PAM s PCB Layout 39 PANTECH...

Page 41: ...Checking Point 3 1 U512 Pin 18 Logic High 2 3 Check route connection PAM_ENABLE Logic High 3 3 2 U512 Pin 1 Logic Low 2 Check this pin 1 When Logic High then DCS Mode While Logic Low GSM900 mode is o...

Page 42: ...NABLE and DCSSEL Test Point on the PCB Layout 6 5 4 VC TCXO Step Test point Typical Value Condition Reaction to Abnormality 4 1 U503 Pin 1 0 5V 2 5V 1 2 3 4 5 6 Check route connection AFC 4 2 U503 Pin...

Page 43: ...tch Module Step Test point Typical Value Condition Check point 5 1 U548 Pin 4 2 8V 2 When Pin 4 is Logic High and Pin 8 is Logic Low the mode is GSM900 Tx 5 2 U548 Pin 8 2 8V 3 While Pin 8 is Logic Hi...

Page 44: ...PG 1400 Service Manual STEP 5 3 STEP 5 1 STEP 5 2 Fig 6 9 U548 Antenna Switch Module Circuit STEP 5 1 STEP 5 2 Fig 6 10 U548 Antenna Switch Module PCB Layout 43 PANTECH...

Page 45: ...ed for initialization of FM radio IC or setting frequency If FM_EXT_CLK 3 15MHz is generated in the early time to operate Radio mode or select frequency it is right CP3 This point is for communication...

Page 46: ...PG 1400 Service Manual CP2 CP3 6 6 3 Check output part in the FM radio mode CP 4 FM radio output signal 45 PANTECH...

Page 47: ...PG 1400 Service Manual CP4 46 PANTECH...

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