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PG-1210 Service Manual

6.2.2 No Receivng tone heard ( Hands-free Earphone )

1. Check to see if U101.J16 (R215) is around 0V:

NO Check to see J105 : CP115

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

2. Check C231, V203 pin for waveform : CP116

3, Check Hands-free Earphone

CP116

CP115

CP115

CP116

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Summary of Contents for PG-1210

Page 1: ...1210 PG 1210 Service Manual GSM Cellular Phone Pantech Co Ltd Korea May 26 2005 1st Edition For Use by Authorized Service Maintenance Personal Only Documents to Receive This Addendum PG 1210 Maintenan...

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: ...PART 34 6 3 1 SIM ERROR 34 6 4 CHARGER PART 35 6 4 1 CHARGING ERROR 35 6 5 RF PART 37 6 5 1 TEST CONDITIONS 37 6 5 2 POWER SUPPLY CHECK POINT 38 6 5 3 POWER AMPLIFIER MODULE 40 6 5 4 VC TCXO 42 6 5 5...

Page 4: ...en 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 relatin...

Page 5: ...ernal antenna and its color LCD with font built in enables both Spanish and English text service And power control basic feature of GSM security feature voice symbol feature and variable data rate fea...

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

Page 7: ...of each part 3color Indicator LED 1 0 65K CSTN 96x64 pixels 330K CCD Camera Speaker Receiver Hall 1 8 65K CSTN 128 128 pixels Soft Key 1 Soft Key 2 Volume up down 5 Way Menu Navigation Key End Power o...

Page 8: ...en 36 W x 48 2 H x 5 2 D mm Effective Area 22 96 W x 16 48 H mm 1 0 inch Number of Pixel 96 W x RGB W x 64 H pixel Pixel pitch 70 W x 210 H um 3 3 Keypad Market Goal Projected Actual Comments English...

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: ...uts 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 13k...

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: ...2 3 Receiver Section 4 2 3 1 An Overview of Receive section Fig 4 6 Receiver block diagram The PG 1210 s Aero II transceiver uses a digital low IF receiver architecture that allows for the on chip int...

Page 15: ...e inputs Digital to analog converters DACs drive differential I and Q analog signals onto the BIP BIN BQP and BQN pins to interface to standard analog input baseband ICs The receive DACs are updated a...

Page 16: ...This significantly minimizes any load pull effects and eliminates the need for off chip isolation networks A quadrature mixer upconverts the differential in phase BIP BIN and quadrature BQP BQN baseb...

Page 17: ...presses other images and spurious frequencies when the terminal transmits GMSK modulated frequencies C Power AMP Module PAM This device amplifies signals ahead of transmiting them through the antenna...

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: ...ent 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 battery...

Page 20: ...PG 1210 Service Manual CP100 3 Check to see if U408 5 6 and R221 pin is same with battery power CP101 19 PANTECH...

Page 21: ...PG 1210 Service Manual CP101 CP101 20 PANTECH...

Page 22: ...PG 1210 Service Manual 4 Check to see if U201 and C224 C225 C227 C229 C232 C233 C234 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 1210 Service Manual 8 Check to see if U509 and C132 C129 R130 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: ...210 Service Manual CP107 6 1 3 KEYPAD LED Not in Operation 1 Check to see if R433 R438 CP110 NO Replace the resistors 2 Check R432 signal control PWM CP111 3 Check U401 CP110 CP111 CP110 CP111 25 PANT...

Page 27: ...PG 1210 Service Manual 6 1 4 LCD Backlight Not in Operation White 1 Check to see if U101 G18 or R104 R105 pins are controlled GPIO 2 8V CP112 CP112 CP112 26 PANTECH...

Page 28: ...ands 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 C416 C417 p...

Page 29: ...Hands free Earphone 1 Check to see if U101 J16 R215 is around 0V NO Check to see J105 CP115 Set to HP8922M to connect a call and then set to 1kHz 2 Check C231 V203 pin for waveform CP116 3 Check Hand...

Page 30: ...ic pin is around 1 5V CP117 NO Check that R135 C137 C136 and R138 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 connec...

Page 31: ...Check to see if R206 pin is 2 5V CP119 NO Check that C222is 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: ...Hook Switch CP120 NO Check that B101 cold solder broken short to the other PCB pattern or not If you find out any defect you replace it 3 Check to see if U405 3 pin is around 0V when you press Hook S...

Page 33: ...heck to see if C302 C300 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 18...

Page 34: ...1 Check to see if R102 pin is 2 8V CP124 NO Check to see R102cold 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: ...17 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 J103 2 3 6 R116 R117 R118 for wave form CP127 NO Check to see J104 R116 cold so...

Page 36: ...J101 23 24 I O connector pin and F101 D118 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 Check to...

Page 37: ...PG 1210 Service Manual CP129 36 PANTECH...

Page 38: ...nel DCS Band Tx mode Ch698 Power Level 10 4 Test condition 3 Traffic channel PCS Band Tx mode Ch662 Power Level 10 5 Test condition 4 Traffic channel GSM850 Band Rx mode Ch190 Input power 70dBm 6 Test...

Page 39: ...n 1 3 8V 2 3 4 5 6 7 Check route connection VBAT 2 2 U504 Pin 5 2 8V 2 3 4 5 6 7 Check route connection VCC_RFCHIP 2 3 U505 Pin 3 8 20 3 8V 2 3 4 5 6 7 Check route connection VBAT Step 2 1 Step 2 2 Fi...

Page 40: ...PG 1210 Service Manual Step 2 3 Fig 6 3 U505 PAM s Power Check Point 39 PANTECH...

Page 41: ...fier Module Step Test point Typical Value Condition Checking Point 3 1 U505 Pin 2 Logic High 2 3 4 Check route connection TX_PA Logic High 3 4 3 2 U505 Pin 4 Logic Low 2 5 6 7 Check this pin 2 When Lo...

Page 42: ...PG 1210 Service Manual STEP 3 2 STEP 3 1 Fig 6 5 U505 PAM TX_PA and DCS SEL Test Point Circuit 41 PANTECH...

Page 43: ...out 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 7 Check route connection AFC 4 2 U503 Pin 4 2 8V 1 2 3 4 5 6 7 Check route connec...

Page 44: ...gh and Pin 4 and Pin 2 is Logic Low the mode is EGSM Tx 5 2 U501 Pin 4 2 8V 3 4 While Pin 4 is Logic High and Pin 10 and Pin 2 is Logic Low the operating mode is DCS Tx PCS TX 5 3 U501 Pin 10 Pin 4 Pi...

Page 45: ...PG 1210 Service Manual Fig 6 9 U501 Antenna Switch Module Circuit STEP 5 1 STEP 5 4 STEP 5 2 STEP 5 1 STEP 5 2 STEP 5 3 STEP 5 3 Fig 6 10 U501 Antenna Switch Module PCB Layout 44 PANTECH...

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