LG VX5400 User manual

CDMA Mobile Subscriber Unit
Copyright@2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only
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
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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
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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
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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
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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)
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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
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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
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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
29
70
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
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