LG VX5400 Bedienungsanleitung

CDMA Mobile Subscriber Unit

Only for training and serving purposes

VX5400

Internal Use Only

SERVICE MANUAL

TRI BAND, QUAD MODE

[PCS/GPS/CELLULAR/AMPS]

CDMAMOBILEPHONE

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TABLE OF CONTENTS

CHAPTER 1………………………………………………………………………………….5

1. SPECIFICATION............................................................................................................................... 5

1.1 General Specification.................................................................................................................................. 5

1.2 Receive Specification .................................................................................................................................. 6

1.3 Transmit Specification................................................................................................................................ 8

1.4 MS (Mobile Station) Transmitter Frequency......................................................................................... 10

1.5 MS (Mobile Station) Receiver Frequency............................................................................................... 11

1.6 AC Adapter : See Appendix.................................................................................................................. 12

1.7 Cigarret Lighter Adapter : See Appendix.............................................................................................. 12

1.8 Portable Hands-Free Kit : Not Supported.............................................................................................. 12

2. INSTALLATION .............................................................................................................................. 13

2.1 Installing a Battery Pack.......................................................................................................................... 13

2.2 For Adapter Use........................................................................................................................................ 13

2.3 For Mobile Mount..................................................................................................................................... 13

CHAPTER 2. NAM INPUT METHOD …………………………………………………...15

-2- Only for training and serving purposes

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CHAPTER 3. Circuit Description …….…………………………………………………...23

1. RF TRANSMIT/RECEIVE PART.....................................................................................................23

1.1 Overview.................................................................................................................................................... 23

1.2 Description of Receive Part Circuit......................................................................................................... 24

1.3 Description of Transmit Part Circuit...................................................................................................... 27

1.4 Description of Frequency Synthesizer Circuit ....................................................................................... 28

2. DIGITAL/VOICE PROCESSING PART.......................................................................................... 28

2.1 Overview.................................................................................................................................................... 28

2.2 Configuration............................................................................................................................................ 28

2.3 Circuit Description.................................................................................................................................... 29

CHAPTER 4. Trouble shooting… …….…………………………………………………...32

4.1 Rx part Trouble .......................................................................................................................................... 32

4.2 Tx part Trouble........................................................................................................................................... 62

4.3 Logic part Trouble...................................................................................................................................... 92

CHAPTER 5. Safety ……….…….…….……………………………………………..…...116

Only for training and serving purposes - 3 -

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CHAPTER 6. Glossary…………...…….…………………………………………...……..119

Appendix……………...…………...…….…………………………………………...……..131

1. Assembly and Disassembly diagram.......................................................................................... 132

2. Block and Circuit diagram............................................................................................................ 135

3. Part List .......................................................................................................................................... 147

4. Component Layout........................................................................................................................ 160

5. BGA Pin Map.................................................................................................................................. 169

-4- Only for training and serving purposes

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CHAPTER 1. System Introduction

1. Specification

1.1 General Specification

1.1.1 Transmit/Receive Frequency Interval

1) CELLULAR : 70MHz

2) PCS : 140 MHz

3) AMPS : 45MHz

1.1.2 Number of Channels (Channel Bandwidth)

1) CELLULAR : 20 Channels

2) PCS : 48 Channels

3) AMPS : 832 Channels

1.1.3 Operating Voltage : DC 3.2~4.1V

1.1.4 Battery Power Consumption : DC 3.7V

SLEEP IDLE MAX POWER

CELLULAR 1.2 mA 110 ~ 120mA 600 mA (24 dBm)

PCS 1.2 mA 120 ~ 130 mA 700 mA (24 dBm)

AMPS Average 43 mA 800 mA (27 dBm)

1.1.5 Operating Temperature : -30°C ~ +60°C

1.1.6 Frequency Stability

1) CDMA : ±0.5PPM

2) PCS : ±0.1PPM

3) AMPS : ±2.5PPM

1.1.7 Antenna : Intenna, 50 Ω

Only for training and serving purposes - 5 -

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1.1.8 Size and Weight

1) Size : 98.7 * 47.8 * 17.4 mm

2) Weight : 103 g (Approximately with standard battery)

1.1.9 Channel Spacing

1) CELLULAR : 1.25MHz

2) PCS : 1.25 MHz

3) AMPS : 30KHz

1.1.10 Battery Type, Capacity and Operating Time.

Unit = Hours : Minutes

Standard (1,000mAh)

CELLULAR About 140 Hours (SCI=1)

PCS About 140 Hours (SCI=1)

Standby Time

AMPS 19 Hours

CELLULAR 210 Minutes (+10dBm output)

PCS 210 Minutes (+10dBm output)

Talk time

AMPS 120 Minutes (Power Level 4)

1.2 Receive Specification

1.2.1 Frequency Range

1) CELLULAR : 869 MHz ~ 894 MHz

2) PCS : 1930 MHz ~ 1990 MHz

3) GPS : 1575.42 MHz

4) AMPS : 869.04 MHz ~ 893.97 MHz

1.2.2 Local Oscillating Frequency Range :

1) CELLULAR : 1738.08 MHz ~ 1787.94 MHz

2) PCS : 1715.56 MHz ∼1768.89 MHz

3) GPS : 3150.84 MHz

4) AMPS : 1738.08MHz ~ 1787.94MHz

1.2.3 Sensitivity

1) CELLULAR : -104 dBm (C/N 12dB or more)

2) PCS : -104 dBm (C/N 12dB or more)

3) GPS : -148.5 dBm (w/o SA), -152 dBm (w/SA)

4) AMPS : -116 dBm (12dB SINAD)

-6- Only for training and serving purposes

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1.2.4 Selectivity

1) CELLULAR : 3dB C/N Degration (With Fch±1.25 KHz : -30dBm)

2) PCS : 3dB C/N Degration (With Fch±1.25 KHz : -30dBm)

3) AMPS : 16dB at Fch ±30kHz, 60 dB at Fch ±60kHz

1.2.5 Interference Rejection

1) Single Tone : -30dBm at 900 kHz (CELLULAR), -30dBm at 1.25MHz(PCS)

2) Two Tone : -43dBm at 900 kHz & 1700kHz(CELLULAR), -43dBm at 1.25 MHz & 2.05 MHz

1.2.6 Spurious Wave Suppression : Maximum of -80dB

1.2.7 CDMA Input Signal Range

zDynamic area of more than -104~ -25 dB: 79dB at the 1.23MHz band.

zTransmit Band : below –60dBm

zReceive Band : below –80dBm

1.2.8 AMPS De-Emphasis : -6dB/OCT within 0.3~3kHz

1.2.9 AMPS Expander

zExpansion Rate : 1:2

zAttack Time : within 3mS

zRecovery Time : within 13.5mS

zReference Input : Output level to a 1000Hz tone from a carrier within +2.9kHz peak frequency

deviation.

1.2.10 AMPS Sensitivity : 12dB SINAD/-116dBm

1.2.11 AMPS Intermodulation Spurious Response Attenuation : Above 65dB

1.2.12 AMPS RSSI Range : Above 60dB

1.2.13 AMPS Protection Against Spurious Response Interference : Above 60dB

1.2.14 AMPS In Band Conducted Spurious Emissions

zTransmit Band : below –60dBm

zReceive Band : below –80dBm

1.2.15 AMPS Out of Band Conducted Spurious Emissions : Below -47dBm

Only for training and serving purposes - 7 -

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1.2.16 AMPS Radiated Spurious Emissions

Frequency Range Maximum allowable EIRP

25 ~ 70 kHz

70 ~ 130 kHz

130 ~ 174 kHz

174 ~ 260 kHz

260 ~ 470 kHz

470 ~ 1.0 GHz

-45 dBm

-41 dBm

- 41 ~ - 32 dBm

-32 dBm

- 32 ~ - 26 dBm

-21 dBm

1.3 Transmit Specification

1.3.1 Frequency Range

1) CELLULAR : 824MHz ~ 849MHz

2) PCS : 1850 MHz ~ 1910 MHz

3) AMPS : 824.04MHz ~ 848.97MHz

1.3.2 Output Power

1) CELLULAR : 0.282 W

2) PCS: 0.252 W

4) AMPS : 0.4W

1.3.3 CDMA TX Frequency Deviation :

1) CELLULAR: +300Hz or less

2) PCS: ±150Hz

3) AMPS: +300Hz or less

1.3.4 CDMA TX Conducted Spurious Emissions

1) CELLULAR : 900kHz : - 42 dBc/30kHz below

1.98MHz : - 54 dBc/30kHz below

2) PCS : -42 dBc / 30KHz below

1.3.5 CDMA Minimum TX Power Control

1) CELLULAR : - 50dBm below

2) PCS: -50dBm below

1.3.6 AMPS Carrier ON/OFF Conditions

“ ON” condition : within +3dB of specification output (in 2msec)

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1.3.7 AMPS Compressor

1) Compression Rate : 2:1

2) Attack Time : 3msec

3) Recovery Time : 13.5msec

4) Reference Input : Input level for producing a nominal +2.9kHz peak requency deviation of transmitted

carrier.

1.3.7 AMPS Preamphasis : 6dB/OCT within 0.3 ~ 3 kHz

1.3.8 AMPS Maximum Frequency Deviation

1) F3 of G3 : ±12kHz (±10% )

2) Supervisory Audio Tone : ±2kHz (±10% )

3) Signaling Tone : ±8kHz (±10%)

4) Wideband Data : ±8kHz (±10 %)

1.3.9 AMPS Post Deviation Limiter Filter

1) 3.0kHz ~ 5.9kHz : above 40log(F/3000) dB

2) 5.9kHz ~ 6.1kHz : above 35dB

3) 6.1kHz ~ 15kHz : above 40log(F/3000) dB

4) Over 15kHz : above 28dB

1.3.10 AMPS Spectrum Noise Suppression

1) For all Modulation

fo+20kHz ~ fo+45kHz : above 26dB

2) For Modulation by Voice and SAT

fo+45kHz : above 63+10log(Py) dB

3) For Modulation by WBD (without SAT) and ST (with SAT)

fo+45kHz ~ fo+60kHz : above 45dB

fo+60kHz ~ fo+90kHz : above 65dB

fo+90kHz ~ 2fo : above 63+10log(Py) dB,

where fo=carrier frequency, Py=mean output power in watts.

1.3.11 AMPS Harmonic and Conducted Spurious Emissions : above 43+10log(Py) dB

Only for training and serving purposes - 9 -

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1.4 MS (Mobile Station) Transmitter Frequency

1.4.1 CELLULAR mode

Ch # Center Freq. (MHz) Ch # Center Freq. (MHz)

1011

111

152

193

234

275

316

363

824.640

825.870

827.100

828.330

829.560

830.790

832.020

833.250

834.480

835.890

404

445

486

527

568

609

650

697

738

779

837.120

838.350

839.580

840.810

842.040

843.270

844.500

845.910

847.140

848.370

1.4.2 PCS mode

Ch # Center Freq (MHz) Ch # Center Freq (MHz) Ch # Center Freq (MHz)

25 1851.25 425 1871.25 825 1891.25

50 1852.50 450 1872.50 850 1892.50

75 1853.75 475 1873.75 875 1893.75

100 1855.00 500 1875.00 900 1895.00

125 1856.25 525 1876.25 925 1896.25

150 1857.50 550 1877.50 950 1897.50

175 1858.75 575 1878.75 975 1898.75

200 1860.00 600 1880.00 1000 1900.00

225 1861.25 625 1881.25 1025 1901.25

250 1862.50 650 1882.50 1050 1902.50

275 1863.75 675 1883.75 1075 1903.75

300 1865.00 700 1885.00 1100 1905.00

325 1866.25 725 1886.25 1125 1906.25

350 1867.50 750 1887.50 1150 1907.50

375 1868.75 775 1888.75 1175 1908.75

-10- Only for training and serving purposes

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