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Service Manual Model : U250/KU250
Date: June, 2007 / Issue 1.0
Table Of Contents 4.16 Receiver Path ....................................107 1. INTRODUCTION .............................. 5 4.17 Headset path......................................109 1.1 Purpose................................................... 5 4.18 Speaker phone path...........................111 1.2 Regulatory Information............................ 5 4.19 Main microphone ...............................113 4.20 Headset microphone..........................115 2. PERFORMANCE................
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1. INTRODUCTION 1. INTRODUCTION 1.1 Purpose This manual provides the information necessary to repair, calibration, description and download the features of this model. 1.2 Regulatory Information A. Security Toll fraud, the unauthorized use of telecommunications system by an unauthorized part (for example, persons other than your company’s employees, agents, subcontractors, or person working on your company’s behalf) can result in substantial additional charges for your telecommunications service
1. INTRODUCTION E. Notice of Radiated Emissions This model complies with rules regarding radiation and radio frequency emission as defined by local regulatory agencies. In accordance with these agencies, you may be required to provide information such as the following to the end user. F. Pictures The pictures in this manual are for illustrative purposes only; your actual hardware may look slightly different. G. Interference and Attenuation A phone may interfere with sensitive laboratory equipmen
2. PERFORMANCE 2. PERFORMANCE 2.1 System Overview Item Specification Shape GSM900/1800/1900 and WCDMA2100 - Bar type Handset Size 110.9 X 46.7 X 15.6 mm Weight Under 83 g (with 950mAh Battery) Power 3.7 V normal, 950 mAh Li-Ion Talk Time Over 200 min (WCDMA, Tx=12 dBm, Voice) (with 950mAh) Over 180 min (GSM, Max Tx Power, Voice) Standby Time Over 350 Hrs (WCDMA, DRX=1.28) (with 950mAh) Over 450 Hrs (GSM, Paging period=9) Antenna Internal type LCD Main 1.76” TFT, QCIF, 262K LCD Backlight White LE
2. PERFORMANCE 2.2 Usable environment 1) Environment Item Specification Voltage 3.7 V(Typ), 3.2 V(Min), [Shut Down : 3.2 V] Operation Temp -20 ~ +60°C Storage Temp -20 ~ +70°C Humidity 85 % (Max) 2) Environment (Accessory) Reference Spec. Min Typ. Max Unit TA Power Available power 100 220 240 Vac * CLA : 12 ~ 24 V(DC) 2.3 Radio Performance 1) Transmitter - GSM Mode No Item GSM DCS & PCS 9k ~ 1GHz -39dBm 100k~1GHz -39dBm MS allocated 1G~[A]MHz -33dBm Channel [A]M~[B]MHz -39dBm 1G~12.75GHz -33dBm
2. PERFORMANCE No Item GSM DCS & PCS 30M~1GHz -36dBm 30M ~ 1GHz -36dBm MS allocated 1G~[A]MHz -30dBm Channel [A]M~[B]MHz -36dBm 1G ~ 4GHz -30dBm Radiated [B]M~4GHz -30dBm 2Spurious 30M ~ 880MHz -57dBm 30M~880MHz -57dBm Emission 880M ~ 915MHz -59dBm 880M~915MHz -59dBm 915M~1GHz -57dBm 915M~1GHz -57dBm Idle Mode 1G~[A]MHz -47dBm 1G~[A]MHz -47dBm [A]M~[B]MHz -53dBm [A]M~[B]MHz -53dBm [B]M~4GHz -47dBm [B]M~4GHz -47dBm 3 Frequency Error ±0.1ppm ±0.1ppm ±5(RMS) ±5(RMS) 4 Phase Error ±20(PEAK) ±20(PEAK
2. PERFORMANCE No Item GSM DCS & PCS Frequency offset 800kHz Intermodulation product should 7 Intermodulation attenuation – be Less than 55dB below the level of Wanted signal Power control Power Tolerance Power control Power Tolerance Level (dBm) (dB) Level (dBm) (dB) 533 ±3 0 30 ±3 631 ±3 1 28 ±3 729 ±3 2 26 ±3 827 ±3 3 24 ±3 925 ±3 4 22 ±3 10 23 ±3 5 20 ±3 8Transmitter Output Power 11 21 ±3 6 18 ±3 12 19 ±3 7 16 ±3 13 17 ±3 8 14 ±3 14 15 ±3 9 12 ±4 15 13 ±3 10 10 ±4 16 11 ±5 11 8 ±4 17 9 ±5
2. PERFORMANCE 2) Transmitter - WCDMA Mode No Item Specification 1 Maximum Output Power Class 3 : +24dBm(+1/-3dB) 2Frequency Error ±0.1ppm 3 Open Loop Power control in uplink ±9dB@normal, ±12dB@extreme Adjust output(TPC command) cmd 1dB 2dB 3dB +1 +0.5/1.5 +1/3 +1.5/4.5 4 Inner Loop Power control in uplink 0 -0.5/+0.5 -0.5/+0.5 -0.5/+0.5 -1 -0.5/-1.5 -1/-3 -1.5/-4.5 Group (10 equel command group) +1 +8/+12 +16/+
2. PERFORMANCE No Item Specification 33dB@5MHz, ACP>-50dBm 13 Adjacent Channel Leakage Ratio(ACLR) 43dB@10MHz, ACP>-50dBm -36dBm@f=9~150KHz, 1K BW -36dBm@f=50KHz~30MHz, 10K BW -36dBm@f=30MHz~1000MHz, 100K BW Spurious Emissions -30dBm@f=1~12.5GHz, 1M BW 14 (*: additional requirement) (*)-41dBm@f=1893.5~1919.6MHz, 300K (*)-67dBm@f=925~935MHz, 100K BW (*)-79dBm@f=935~960MHz, 100K BW (*)-71dBm@f=1805~1880MHz, 100K BW -31dBc@5MHz,Interferer -40dBc 15 Transmit Intermodulation -41dBc@10MHz, Interferer
2. PERFORMANCE 4) Receiver - WCDMA Mode No Item Specification 1 Reference Sensitivity Level -106.7 dBm(3.84 MHz) -25dBm(3.84MHz) 2Maximum Input Level -44dBm/3.84MHz(DPCH_Ec) UE@+20dBm output power(Class3) 33dB 3 Adjacent Channel Selectivity (ACS) UE@+20dBm output power(Class3) -56dBm/3.84MHz@10MHz 4In-band Blocking UE@+20dBm output power(Class3) -44dBm/3.84MHz@15MHz UE@+20dBm output power(Class3) -44dBm/3.84MHz@f=2050~2095 and 2185~2230MHz UE@+20dBm output power(Class3) -30dBm/3.84MHz@f=2025~205
2. PERFORMANCE 2.4 Current Consumption 1) U250/KU250 Current Consumption Stand by Voice Call VT Under 2.80 mA Under 290 mA Under 410mA WCDMA (DRX=1.28) (Tx=12dBm) (Tx=12dBm) Under 2.12 mA Under 320 mA GSM Paging=9 period (Max Tx Power) (Stand by and Voice Call Test Condition : Bluetooth off, LCD backlight off,Neighbor Cell off) (VT Test Condition : Speaker off, LCD backlight On) 2.5 RSSI BAR Level Change WCDMA GSM BAR 4 → 3 -85 ± 2 dBm -90 ± 2 dBm BAR 3 → 2 -95 ± 2 dBm -95 ± 2 dBm BAR 2 → 1-106
2. PERFORMANCE 2.6 Battery BAR Indication Standby Bar 4 Over 3.83 ± 0.05V Bar 4 → 3 3.82 ± 0.05V Bar 3 → 2 3.73 ± 0.05V Bar 2 → 1 3.68 ± 0.05V Bar 1 → Empty 3.58 ± 0.05V Low Voltage, 3.58± 0.05V (Stand-by) / 3.58 ± 0.05V (Talk) Warning message+ Blinking [Interval : 3min(Stand-by) / 1min(Talk)] Power Off 3.20 ± 0.05V - 15 -
2. PERFORMANCE 2.7 Sound Pressure Level No Test Item Specification 1 Sending Loudness Rating (SLR) 8 ±3 dB Nor -4 ± 3 dB 2 Receiving Loudness Rating (RLR) Max -15 ± 3 dB 3 Side Tone Masking Rating (STMR) Min 17 dB MS 4 Echo Loss (EL) Min 40 dB 5 Idle Noise-Sending (INS) Max -64 dBm0p Nor Under -47 dBPA 6 Idle Noise-Receiving (INR) Max Under -36 dBPA 7 Sending Loudness Rating (SLR) 8±3dB Nor -1 ±3 dB 8 Receiving Loudness Rating (RLR) Max -12 ±3 dB 9 Side Tone Masking Rating (STMR) Min 25 dB Heads
3. TECHNICAL BRIEF 3. TECHNICAL BRIEF 3.1 General Description The U250/KU250 supports UMTS-2100, GSM-900, DCS-1800, and PCS-1900 based 1 GSM/GPRS/UMTS. All receivers and the UMTS transmitter use the radio One Zero-IF architecture to eliminate intermediate frequencies, directly converting signals between RF and baseband. The quad- band GSM transmitters use a baseband-to-IF upconversion followed by an offset phase-locked loop that translates the GMSK-modulated signal to RF. UMTS (2100) GSM (900, 1
3. TECHNICAL BRIEF A generic, high-level functional block diagram of U250/KU250 is shown in Figure 1-1. One antenna collects base station forward link signals and radiates handset reverse link signals. The antenna connects with receive and transmit paths through a FEM(Front End Module). The UMTS receive path each include a LNA, a RF band-pass filter, and a downconverter that translate the signal directly from RF-to-baseband using radioOne ZIF technique. The RFIC Rx analog baseband outputs, for t
3. TECHNICAL BRIEF 3.2 GSM Mode 3.2.1 GSM Receiver The Dual-mode U250/KU250’s receiver functions are split among the three RFIC’s as follows: • GSM-900, DCS-1800, and PCS-1900 UMTS-2100 modes use the RTR6275 IC only. Each mode has independent front-end circuits and down-converters, but they share common baseband circuits (with 2 only one mode active at a time). All receiver control functions are beginning with SBI -controlled parameters. RF Front end consists of antenna, antenna switch module(D5
3. TECHNICAL BRIEF The GSM900, DCS, and PCS receiver inputs of RTR6275 are connected directly to the transceiver front-end circuits(filters and antenna switch module). The GSM900, DCS, and PCS receiver inputs use differential configurations to improve common-mode rejection and second-order non-linearity performance. The balance between the complementary signals is critical and must be maintained from the RF filter outputs all the way into the IC pins Since GSM900, DCS, and PCS signals are time-d
3. TECHNICAL BRIEF [Fig 1.2] RTR6275 RX feature - 21 -
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