PORTABLE CELLULAR TELEPHONE SCH-3500 Series SERVICE PORTABLE CELLULAR TELEPHONE Manual CONTENTS 1. General Introduction 2. Specification 3. Installation 4. NAM Programming 5. Product Support Tools 6. Circuit Description 7. Test Procedure 8. Trouble Shooting 9. Exploded Views and Parts List ABC DEF GHI JKL MNO PQRS TUV WXYZ SPACE 10. Block Diagram 11. Electrical Parts List 12. PCB Diagrams 13.
1. General Introduction The SCH-3500 DBDM(Dual Band Dual Mode) phone functions as both analog phone working in AMPS (Advanced Mobile Phone Service) mode and digital phone working in PCS (Personal Communication Service) mode. The following standards and minimum performance standards shall be met or exceeded by each subscriber unit. Air Interface The Subscriber Unit shall be Dual mode and Dual band in compliance with ANSI J-STD-008 and TIA/EIA IS95A(Analog).
2. Specification 2-1 General Frequency Range Transmitter Receiver PCS Mode 1850 ~ 1910 MHz 1930 ~ 1990 MHz AMPS Mode 824 ~ 849 MHz 869 ~ 894 MHz Channel Spacing 1.25 MHz 30 kHz Number of Channels 1200 832 Duplex Spacing 80 MHz 45 MHz Frequency Stability (FRX - 80 MHz) ± 150 Hz ± 2.5 ppm Operating Temperature -30 C ~ 60 C Operating Voltage HHP Hands-free 3.6V DC (± 10%) 13.7V DC (± 10%) Size and Weight Including standard battery Including extended-life battery 11.2 x 5.2 x 2.
Specification 2-2 AMPS Mode TRANSMITTER RF output power : 0.6 W (+2/ - 4 dB) Carrier ON/OFF Conditions “ON” Condition “OFF” Condition : within ± 3 dB of specification output (in 2mS) : below - 60 dBm (in 2mS) Compressor Compression Rate Attack Time Recovery Time Reference Input : 2:1 : 3 mS : 13.5 mS : Input level for producing a nominal ± 2.9 kHz peak frequency deviation of transmitted carrier Preamphasis : 6 dB/OCT within 0.
Specification RECEIVER DE-Emphasis : -6 dB/OCT within 0.3 ~ 3 kHz Expander Expansion Rate Attack Time Recovery Time Reference Input : 1:2 : within 3 mS : within 13.5 mS : Output level to a 1000 Hz tone from a carrier within ± 2.
Specification 2-3 PCS Mode TRANSMITTER Waveform Quality : 0.944 or more Open loop Power Control Range -25 dBm -65 dBm -104 dBm : -60.5 dBm ~ 41.5 dBm : -20.5 dBm ~ -1.5 dBm : +15.0 dBm ~ +30.0 dBm Minimum Tx Power Control : -50 dBm below Closed Loop Power Control Range : ±24 dB Maximum RF Output Power : 200 mW (+23 dBm) Occupied Bandwidth : 1.23 MHz Conducted Spurious Emissions @ 1.25 MHz : -42 dBc/30 KHz RECEIVER Rx Sensitivity and Dynamic Range (Rate Set 2) : -104 dBm, FER=0.
Specification 2-4 PCS Debug Display Information To select debug display mode : Press [MENU] + [9] + [0], and press [0] + [4] + [0] + [7] + [9] + [3], and press [1]. 1 Sxxxxx : SID (System Identification) toggle Nxxxxx : NID (Network Identification) toggle IN IDLE MODE 1 4 7 2 3 Sxxxxx SIx x T - xx Dxxx - xx Pxxx CHxxxx xx xx 12 6 8 3 Handset Status : 0 - NO SVC 1 - Synchronization 2 - Paging (Idle) 3 - Reg.
Specification 2-5 AMPS Debug Display Information To select debug display mode : Press [MENU] + [9] + [0], and press [0] + [4] + [0] + [7] + [9] + [3], and press [1].
3. Installation 3-1 Installing a Battery Pack 1. 2. To attach the battery pack after charging, align it with the phone about 1cm (1/2”) away from its place so that the two arrows on the phone are seen, the battery charge contacts pointing downward. 3. To remove the battery pack, release it by pressing the button on the rear of the phone. 4. Slide the battery pack downward about 1cm (1/2”) and lift it away from the phone. Slide the battery pack upwards until it clicks firmly into position.
Installation 3-3 For Mobile Mount 3-3-1 Antenna 3-3-2 Cradle 1. 1. Choose a location where it is easy to reach and does not interfere with the driver’s safe operation of the car. 2. Separate the two halves of the clamshell by removing the two large slotted screws. See the figure 3-2. 3. Drill holes and mount the lower half of the clamshell by using the screws. 4. Place the cradle onto the remaining half of the clamshell and assemble them by using the screws. 5.
Installation 3-3-3 Hands-Free Box 3-3-5 Hands-Free Microphone 1. Drill holes in a proper location for the handsfree box, attach the mounting bracket by using the screws. See the figure 3-3. 1. 2. Install the hands-free box into the bracket. It is recommended to install the microphone where it is 30-45 cm (12-18”) away from the driver. Choose the location where is least susceptible to interference caused by external noise sources, ie, adjacent windows, car audio speakers, etc.
Installation 3-3-6 Cables 1. Connect the cradle and the hands-free box with the data cable. See the figure 3-4. 2. Connect the antenna cable to the RF jack of the cradle. 3. Connect the red wire to the battery (+) terminal, black wire to the vehicle chassis, brown wire to the Car Audio Mute port and orange wire to the ignition port in the key box of vehicle or battery (+) terminal. 4. Connect the other end of the power cable to the PWR jack of the hands-free box.
4. NAM Programming NAM features can be programmed as follows: Notes: - If you enter the NAM program mode, each item shows the currently stored data. Go to the next item by pressing OK. - You can modify the data by entering a new data. - If you enter a wrong digit, press CLR to delete the last digit. Press and hold CLR to delete all digit. - To scroll items backwards press the VOLUME button on the left side of the phone.
NAM Programming 4-1-2 Phone # LCD Display SVC Menui 1:Phone# 2:General 3:NAM m Phone # 1234567890 Mobile ID # 1234567890 Key in Function Choose ‘Phone#’. 1 Phone number OK Mobile ID OK 4-1-3 Setting Up NAM LCD Display SVC Menui 1:Phone# 2:General 3:NAM m IMSI_MCC 310 Key in 3 Choose ‘NAM’. Number OK IMSI Mobile Country Code, current code is displayed. -to change, enter new one. -stores it. Number OK IMSI Mobile Network Code, current code is displayed. -to change, enter new one.
NAM Programming LCD Display Key in Function Yes ˆ or ¤ OK CDMA foreign SID, current status is displayed. -change the system. -store it. Yes ˆ or ¤ OK CDMA foreign NID, current status is displayed. -change the system -store it. HOME SID 4120 Number OK SID written in the list, current status is displayed. -to change, enter new one. -store it. NID Number OK NID written in the list, current status is displayed. -to change, enter new one. -store it.
5. Product Support Tools 5-1 General IMPORTANT INFORMATION Purpose The Product Support Tool (PST) offers you the ability to interface with the SAMSUNG DBDM telephone using a PC. With this tool you can program the phones network system requirements and functionality, swap phone data, and download software upgrades. This document supports UniPST version x.xx. NOTE: This software must be executed in the Windows95/98 mode. EQUIPMENT REQUIRED Make sure you have the following equipment setup: 1.
Product Support Tools 5-2. PST (Product Support Tool) 5-2-1 Getting Started MAIN MENU SCREEN 1. At the Windows95/98, Double Click “UniPst.exe”. 2. The Main Menu Screen will be displayed. The Main Menu Screen shows the basic tasks that are available. CAUTION: DO NOT attempt to program phone with a low battery. PST SETUP UniPst supports SAMSUNG DBDM portable telephone. You can select serial port COM1 or COM2.
Product Support Tools Save Data to File Click this icon to save the current parameters to a file. Once you enter a filename, Click button to write all current parameters to that file. This way the same information can be downloaded into multiple phones. Write to Phone Click this icon to write the selected parameter values to the phone. Writing the selected values to the phone may take up to a minute.
6. Circuit Description 6-1 Logic Section 6-1-1 Power Supply CPU With the battery installed on the phone and by pressing the PWR key, the VBATT and ON_SW signals will be connected. This will turn on Q905 (2SC4081BR). This in turn will be supplied to regulators (U905 and U907), thus releasing them from the shut-down state to output regulated 3.0V. The VBATT applied to ON_SW will turn on Q907 (DTC144EE) resulting in the signal ON_SW_SENSE to change state from HIGH to LOW.
Circuit Description 6-1-3 Baseband Part MOBILE SYSTEM MODEM (MSM) ADC Interface The MSM equipped with the ARM7TDMI core is an important component of the CDMA cellular phone. The MSM comes in a 196 pins BGA package. The interface block diagram is shown on page 6-3. ADC_CLK (pin C1), ADC_ENABLE (pin C2) and ADC_DATA (pin B1) are required to control the internal ADC in the IFT/IFR.
Circuit Description ANTENNA MSM3000 Mobile Station Modem External Test/Debug System UART RF and IF Circuits RF Control Signals RF Interface Peripheral Circuits (RAM, ROM, EEPROM, Display, etc.
Circuit Description 6-1-4 Audio Part RX AUDIO PATH TX AUDIO PATH De-Emphasis Circuit The voice signal output from microphone is filtered and amplified by the internal OP-AMP and is converted to PCM data by the CODEC (U902). This signal is then applied to the MSM (U908)'s internal vocoder. RX AUDIO PATH The PCM data out from the MSM is converted to audio signal by ADC of CODEC (U902), is then amplified by CODEC (U902) to be sent to the speaker unit.
Circuit Description 6-2 Receiver (For PCS) LOW NOISE AMPLIFIER (LNA) VOLTAGE CONTROLLED OSCILLATOR The low noise amplifier featuring 1.6 dB Noise Figure and 20dB gain amplifier a weak signal receiver from the base station to obtain the optimum signal level. The VCO (U201) generates the signal having 1750 MHz center frequency and ±30 MHz deviation with voltage control. PLL IC (U204) controls this signal. DOWN CONVERTER (MIXER) PHASE LOCKED LOOP (PLL) First local signal is applied to this down converter.
Circuit Description IFT3000 FEATURES IFR3000 FEATURES - Dual-mode operation for CDMA and AMPS - 8-bit DACs convert digital baseband to analog baseband - CDMA and FM signal paths include low-pass filrers for I and Q output waveform smoothing - IF mixer up-converts analog baseband to IF - Controls Tx power level with AGC amplfier having 84 dB dynamic range - Programmable Tx PLL for generating Tx IF frequency - VCO for generation of transmit LO mixing signal - 8-bit general-purpose ADC with 3-input analog m
Circuit Description 6-3 Receiver (For AMPS) LOW NOISE AMPLIFIER (LNA) VOLTAGE CONTROLLED OSCILLATOR The low noise amplifier featuring 1.6 dB Noise Figure and 20 dB gain amplifier a weak signal receiver from the base station to obtain the optimum signal level. The VCO (U202) generates the signal having 966MHz center frequency and ±12.5 MHz deviation with voltage control. PLL IC (U204) controls this signal.
Circuit Description 6-4 Transmitter Section (For PCS) POWER AMP RF BAND PASS FILTER (BPF) Power Amp module (U412) amplifier signal to be sent out to the base station through the antenna. The RF BPF (F403, F404) accepts only specific frequency (1880±30 MHz) to send it out to power and Power Amp module. The band width is 60 MHz. DRIVER AMP The driver amp (U409) allows the signal input to the Power Amp module (U412) to be within a specified level.
Circuit Description 6-6 Test Command Table To change the phone from normal mode to test mode, you should enter the following keys. : Press [4 7 * 8 6 9 # 1 2 3 5] Command No. (OP, AB, RB) Command SW Name 01(1F, 0, 0) T_SUSPEND_I Terminate the normal mode, enter to the test mode. 02(3f, 0, 0) T_RESTART_I Terminate the test mode, enter to the normal mode. 03(FD, 0, 0) T_SAVE_VAL_I Save value in EEPROM. (Only for Auto test) 04(1D, 0, 1) T_GET_MODE_I Get mode.
Circuit Description Command No. (OP, AB, RB) Signal. Name Description 43(AB, 0, 0) T_DTMFOFF_I Deactivate DTMF generator. 44(B0, 0, 0) T_COMPANDORON_I Enable the compressor and expandor. 45(B1, 0, 0) T_COMPANDOROFF_I Disable the compressor and expandor. 46(B2, 0, 0) T_AMPS_VCLINE_I* Enter Analog voice channel state. 47(B3, 3, 0) T_AMPS_AUD_GAIN_I FM audio gain. 48(B4, 0, 0) T_VIBRATOR_ON_I Activate a vibrator. 49(B5, 0, 0) T_VIBRATOR_OFF_I Deactivate a vibrator.
Circuit Description Command No. (OP, AB, RB) Signal. Name Description 77(D7, 0, 3) T_READ_TEMP_I Read Temp. 78(D8, 0, 3) T_READ_HDET_I Read High Detect. 2) 79(D9, 1, 0) T_BUZZER_ON_I Buzzer On at DTMF 0 key. 80(DA, 0, 0) T_BUZZER_OFF_I Buzzer Off. 81(E3, 0, 0) T_VOC_PCMLPON_I Play a PCM LOOP BACK. 82(E4, 0, 0) T_VOC_PCMLPOFF_I Play off a PCM LOOP BACK. 85(E7, 0, 0) T_SPEAKER_ON_I Turn on the speaker path. 86(E8, 0, 0) T_SPEAKER_OFF_I Turn off the speaker path.
7. Test Procedure 7-1 List of Equipment • DC Power Supply • Test Interface Box • Test Cable • CDMA Mobile Station Test Set • Spectrum Analyzer (include CDMA test mode) • HP8924C, HP83236B, CMD-80, etc • HP8596E 7-2 Configuration of Test 7-2-1 Hand Set Spectrum Analyzer RF In HP8924C Test Cable Duplexer Out Antenna In From Duplexer Out To ANT In HP83236B RF In/Out Directional Coupler Test Interface Box PC DC Power Supply (+3.
Test Procedure 7-2-3 Test Cable Connection Diagram TEST INTERFACE BOX AUTO SELECT DC POWER INPUT PORT LEFT: AUDIO IN RIGHT: AUDIO OFF CHANGE VOLTAGE LEVEL BY MODEL (3.8 VDC) • RED: + • BLACK: GND UP: AUTO POWER ON DOWN: NOT USE DB25 CONNECTOR CONNECT TO DB25 CONNECTOR OF TEST CABLE T E S T A-IN AUTO RED(+) BLK(-) DC3.
Test Procedure 7-3 Test Procedure 7-3-1 Change the test mode A. To change the phone from normal mode to test mode, you should enter the following keys. : Press [4 7 * 8 6 9 # 1 2 3 5] B. The command [0 1] (Suspend) is entered to start test. : Press [0 1] C. To finish the test mode, you should enter the command [0 2] : Press [0 2] 7-3-2 Channel selection and Tx power output level control 1.9 GHz (PCS) A. To select PCS mode, you should enter the following keys.
8. Trouble Shooting 8-1 Logic Section 8-1-1 No Power Press PWR button. NO Q905 Base input =600 mV? Check Q905 and its neighboring circuits YES NO Check U904 and its neighboring circuits. U904 pin3 input = 0V? YES NO U907 pin 5 output=3.0V? Check U907 and its neighboring circuits. YES NO R945 pin4 output=3.0V? Check R945 and its neighboring circuits.
Trouble Shooting 8-1-2 Abnormal initial operation (Normal +3.0V voltage source) Press PWR Key TCXO CLK applied to U501 pin 35/ U103 pin 36? NO Check VCTCXO output. YES TCXO CLK signal outputted from U103 pin 37? NO Check U103 and its neighboring circuits. Replace if required. YES RAM-CS signal outputted from U100 pin 92? NO Check MSM board,U100 pins 93-96, 98-105, 107-117, 119-126, and 128-132. Replace if required.
Trouble Shooting 8-1-3 Abnormal Backlight Operation Press any button on the phone. ’H’ level outputted from U908 pin 147? NO Check U908 pin 147. Replace if required. YES ’H’ level NO from U908 pin 147 drive Q4 through R35? Check R34, R35, and Q4. Replace if required. YES NO Normal Q5 operation? Check R28, R29, R30 and Q5. Replace if required. YES The voltage applied to LCD pins 46, 47? NO Resolder R31 and R32.
Trouble Shooting 8-1-4 Abnormal Key Data Input Check initial status. Scanning signals outputted from P901 pins 33~42? NO Resolder P901 pins 33~42 YES NO Normal Key data input? Replace the Keypad assembly.
Trouble Shooting 8-1-5 Abnormal Key tone Abnormal keytone. CLK waveform outputted from U908 pin 189? NO Check U908 pin 189. Replace if required. YES CLK waveform applied from U902 pin 2~3? NO Replace U902 YES CLK waveform applied to C907 R932? NO Check C907, R932 YES NO Normal key tone? Replace the Keypad assembly.
Trouble Shooting 8-1-6 Abnormal Alert Tone Abnormal Alert tone. NO ’Low’ level on U902 pin 17? Check U902 pin 17. Replace if required. YES CLK waveform applied to Q902 Base? NO Check R922, Q902. YES NO CLK waveform applied to Q901 Base? Check R934, Q901 YES Is the buzzer connection correct? NO Connect the buzzer correctly. YES Check the buzzer and replace if required.
Trouble Shooting 8-2 Receiver Section 8-2-1 AMPS mode Start AMPS mode. Check AMPS 12dB SINAD OK? NO Check LNA in/output OK? NO Check Duplexer & LNA power. (Gain: +20dB) YES YES YES Check MIXER in/output OK? NO Check 1st NO local & mixer power OK? (Gain(AMPS): +10dB) Check PLL(U204) & VCO output. (Local:0dBm) (VCO output: -6dBm) YES Check IF Filter in/output OK? NO Check IF Filter soldering. (Loss: -5dB) YES YES RSSI OK? YES NO Check 2nd local OK? NO Check PLL(U204) & IFR #25.
Trouble Shooting 8-2-2 PCS mode Start PCS mode. Normal PCS SVC & ROAM OK? NO Check PCS Rx path. YES NO Setup PCS call. OK? Check Transmitter. YES Measure PCS FER.
Trouble Shooting 8-3 Transmitter Section Abnormal Transmitter section. NO NO YES Check U501 TX IF Level OK? AMPS:-12dBm PCS:-24 dBm Check U406(PCS), U407 (AMPS) RF out Level OK? NO YES Check PLL OK? AMPS:-6dBm PCS:-37 dBm Check U407(AMPS) U406(PCS) local level. AMPS:-2dBm PCS:-3dBm YES NO Check U409 (PCS) U408(AMPS) RF Out level OK? YES AMPS:+5dBm PCS:-17dBm SAMSUNG Proprietary-Contents may change without notice 8-9 Check U412(PCS) U411(AMPS) Pout level. AMPS:25dBm PCS:-5.
9.
Exploded View and Parts List 9-2 SCH-3500 Phone Parts List Location No.
GH71-10706A 7PIN (잘림 6PIN) GH71-10706A 7PIN GH71-10640A 3PIN (2EA) GH71-10641A 4PIN GH71-10641A 4PIN (잘림 4PIN) GH71-10651A 5PIN (잘림 5PIN) GH71-00019A 1PIN (1EA) GH71-10643A 6PIN (잘림) GH71-10707A 2PIN (잘림 2PIN)
Exploded View and Parts List 9-3 Desk-Top Rapid Charger Ass’y 9-4 Travel Charger Ass’y (DTC350, GH44-00084A) (TC20, GH44-40090A) 9-5 Cigarette Lighter Adaptor Ass’y (CLC020, GH44-00021F) SAMSUNG Proprietary-Contents may change without notice 9-4
Exploded View and Parts List 9-6 Hands Free Kit Ass’y (HFC350, GH59-00046A) SAMSUNG Proprietary-Contents may change without notice 9-5
38 10.
11. Electrical Parts List Level 1 1 1 1 1 1 1 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 Location No.
Electrical Parts List Level 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 Location No.
Electrical Parts List Level 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 Location No.
Electrical Parts List Location No.
Electrical Parts List Level 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 Location No.
Electrical Parts List Level 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 Location No.
Electrical Parts List Level 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 Location No.
Electrical Parts List Level 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 1 2 1 2 2 Location No. C447 C442 L127, L403, L404, L405 L501 L122, L410 L119 Y902 Y901 U201 U202 U205 F403, F404 F104 F107 F402 F105 F405 F401 F106 F103 F101 U401 J903 J902 J301 J904 P901 J901 U101 U102 U413 F102 PCB K101, K102, K103 K104, K105, K106, K107 K108, K109, K110, K111 - Quantity 1 1 4 1 2 1 1 1 1 1 1 2 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 3 4 4 1 1 1 1 2 Description INDUCTOR-SMD 1.
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PCB Diagrams 12-2 Main PCB Bottom Diagram SAMSUNG Proprietary-Contents may change without notice 12-2
PCB Diagrams 12-3 Key PCB Top Diagram SAMSUNG Proprietary-Contents may change without notice 12-3
PCB Diagrams 12-4 Key PCB Bottom Diagram SAMSUNG Proprietary-Contents may change without notice 12-4
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Circuit Diagrams 13-2 Transmitter Circuit Diagram SAMSUNG Proprietary-Contents may change without notice 13-2
Circuit Diagrams 13-3 Memory Circuit Diagram SAMSUNG Proprietary-Contents may change without notice 13-3
Circuit Diagrams 13-4 DC-DC Converter Circuit Diagram SAMSUNG Proprietary-Contents may change without notice 13-4
Circuit Diagrams 13-5 Control Circuit Diagram SAMSUNG Proprietary-Contents may change without notice 13-5
ELECTRONICS ©Samsung Electronics Co.,Ltd. Sep. 99 Printed in Korea. Code No.: GH68-00676A Sprint.