G510 Service Manual
PANTECH R&D CONFIDENTIAL
1
CONTENTS
SECTION 1 INTRODUCTION .............................................................................................................3
1.1 INTRODUCTION ..............................................................................................................................3
1.2 FREQUENCY ALLOCATION AND ITS USE ...........................................................................................3
1.3 ITEM NAME AND USE .....................................................................................................................4
1.4 CHARACTERISTICS ........................................................................................................................4
SECTION 2 ELECTRICAL SPECIFICATIONS....................................................................................5
2.1 GENERAL ......................................................................................................................................5
2.2 TRANSMITTER…………………………………………………………………………………………….5
2.3 RECEIVER…………………………………………………………………………………………………5
SECTION 3 OPERATION....................................................................................................................6
3.1 NAME OF EACH PART…..……………………………….…………………………………………………6
3.2.DISPLAY ..………………….…………………………….………………………………………………..7
3.3 KEYPAD …………………………………….………….………………………………………………..7
SECTION 4 THEORY OF OPERATION..............................................................................................8
4.1 LOGIC SECTION........................................................................................................................8
4.1.1 DC DISTRIBUTION AND REGULATION PART…………………………………………………………….8
4.1.2 LOGIC PART…………………………………………………………………………………………….8
4.1.2.1 SUMMARY…………………………………………………………………………………………….8
4.1.2.2 BASEBAND DIGITAL SIGNAL PROCESSING…………………………………………………………..8
4.1.3 MEMORY PART………………………………………………………………………………………..10
4.1.4 NOTIFICATION PART .............................................................................................................. …11
4.1.5 KEY PAD PART ......................................................................................................................... 11
4.1.6 LCD MODULE(DISPLAY PART) .................................................................................................. 11
4.2 RADIO TRANSCEIVER SECTION.....................................................................................................12
4.2.1 DC DISTRIBUTION AND REGULATION PART.................................................................................13
4.2.2 TRANSCEIVER PIN DESCRIPTION…………………………………………………….……….14
4.2.3 RECEIVE SECTION………………………………………………………………………………….…14
4.2.3.1 AN OVERVIEW OF RECEIVE SECTION ......................................................................................14
4.2.3.2 RECEIVER PART……………………………………………………………………………….……155
4.2.4 TRANSMIT SECTION ..................................................................................................................17
4.2.4.1 AN OVERVIEW OF TRANSMIT SECTION ....................................................................................17
4.2.4.2 TRANSMITTER PART...............................................................................................................18
4.2.5 OFFSET PLL……………………………………………………………………………….…………..19
4.2.5.1 AN OVERVIEW OF OFFSET PLL............................................................................................19
4.2.5.2 VCTCXO(VOLTAGE CONTROLLED TEMPERATURE COMPENSATED CRYSTAL OSCILLATOR):V801….20
SECTION 5 ALIGNMENT PROCEDURE..........................................................................................21
5.1 RECOMMENDED TEST EQUIPMENT ...............................................................................................21
5.2 CONNECTION OF TEST EQUIPMENT ..............................................................................................21
SECTION 6 EQUIPMENT REPAIR PROCEDURE ...........................................................................22
6.1 NO POWER ON WITH BATTERY APPLIED ..........................................................................................22
6.1.1 POWER CHECK.........................................................................................................................22
6.1.2 OSCILLATION CHECK ...............................................................................................................26
6.1.3 KEYPAD LED NOT IN OPERATION(BLUE) ....................................................................................27
6.1.4 LCD EL BACKLIGHT LED NOT IN OPERATION(WHITE)..………………………………………… …29
6.2 AUDIO PART(EARPIECE, HANDS FREE EARPHONE, MICROPHONE, HANDS FREE MIC)..................29
6.2.1 NO RECEIVING TONE HEARD (EARPIECE) .................................................................................30
6.2.2 NO RECEIVING TONE HEARD (HANDS FREE EARPHONE).............................................................30
6.2.3 SIDETONE NOT TRANSMITTED (EARPIECE)................................................................................32
6.2.4 SIDETONE NOT TRANSMITTED (HANDS FREE MIC).....................................................................32
6.2.5 HOOK SWITCH NOT WORKING................................................................................................33
6.2.6 MELODY NOT RINGING ............................................................................................................34
