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Samsung SCH-470, Service Manual

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CONTENTS

1. General Introduction

2. Specification

3. NAM Programming

4. Data Tr a n s f e r

5. Circuit Description

6. Exploded View and Its Parts List

7. PCB Diagrams

8. Tr o u b l e s h o o t i n g

9. Test Command Ta b l e

10.  Block & Circuit Diagrams

CDMA Portable Cellular Telephone

SERVICE

Manual 

SCH-470

CDMA Portable 
Cellular Telephone

Summary of Contents for SCH-470

Page 1: ... Programming 4 Data Transfer 5 Circuit Description 6 Exploded View and Its Parts List 7 PCB Diagrams 8 Troubleshooting 9 Test Command Table 10 Block Circuit Diagrams CDMA Portable Cellular Telephone SERVICE Manual SCH 470 CDMA Portable Cellular Telephone ...

Page 2: ... à Samsung Electronics Co Ltd APR 1998 Printed in Korea Code No GH68 60687A ...

Page 3: ...ard Handoff and Dynamic RF Power Control technologies are combined into this phone to reduce the call drop while usage CDMA digital cellular network consists of MSO Mobile Switching Office BSC Base Station Controller BTS Base Station Transmission System and MS Mobile Station MS meets the specifications of the below UIS 95A Mobile Station Base Station Compatibility Standard for Dual Mode Wideband S...

Page 4: ...52 829 560MHz 15 568 842 040MHz 6 193 830 790MHz 16 609 843 270MHz 7 234 832 020MHz 17 650 844 270MHz 8 275 833 250MHz 18 697 845 910MHz 9 316 834 480MHz 19 738 847 140MHz 10 363 835 890MHz 20 779 848 370MHz MSC Receiver Frequency FA NO CH NO CENTER FREQUENCY FA NO CH NO CENTER FREQUENCY 1 1011 869 640MHz 11 404 882 120MHz 2 29 870 870MHz 12 445 883 350MHz 3 70 872 100MHz 13 486 884 580MHz 4 111 8...

Page 5: ... MHz TX Conducted Spurious Emissions 900 kHz below 42 dBc 30 kHz 1 98 MHz below 54 dBc 30 kHz Minimum TX Power Control below 50 dBm Open Loop Power Control 25 dBm 57 0 dBm 38 5 dBm 65 dBm 17 5 dBm 1 5 dBm 104 dBm 18 0 dBm 30 0 dBm Standby Output Power below 61 dBm Closed Loop TX Power Control Range Test 1 beyond æ 24 dB Test 2 0 mS 2 5 mS Test 3 beyond æ 24 dB Test 4 beyond æ 24 dB Test 5 beyond æ...

Page 6: ...2 2 Samsung Electronics ...

Page 7: ... you select NAM 2 4 Setup NAM 3 Display the variable of CDMA used commonly when you select NAM 3 5 Setup NAM 4 Display the variable of CDMA used commonly when you select NAM 4 If you don t store the data by pressing STO key after modifying as explains the data does not change You can check the data by pressing VOLUME key without changing the data Caution If you enter the NAM program mode the last ...

Page 8: ...mode STO 0 7 Slot mode index STO Specifies the duration and frequency of times that the mobile checks the paging channel The higher the value the less often the mobile looks at the paging channel and the more power is saved STO Preferred system selection for NAM1 STO Preferred system selection for NAM2 Up to four NAMs are allowed for the phone This lists one of the four NAMs STO Preferred system s...

Page 9: ...STO Suggested setting is 0 ranges from 0 to 1 023 ID number CDMA Acquisition System ID STO Enables you to set the phone to acquire up to six SIDs in the CDMA mode If you enter 0 for any SID the program assumes that you have no more numbers to store Default setting is 0 ranges from 0 to 32 767 up to six SIDs ID number CDMA Lock System ID STO Enable you to specify up to six SIDs that the phone will ...

Page 10: ...phone acquires different systems Determines the roaming status for the mobile All SIDs range from 0 to 32 767 a 0 setting for the SID signifies that it is not active number Network Identification Number STO Controls how the phone acquires different systems and is set and specified in conjunction with each SID e g SID 1 NID 1 Determines the roaming status for the mobile All SIDs range from 0 to 65 ...

Page 11: ...splay Key in Function 4 choose NAM3 3 4 Setting Up NAM3 LCD Display Key in Function NAM Program 5 Setup NAM4 5 choose NAM4 3 5 Setting Up NAM4 The NAM2 setup program is the same as ÆNAM1 Ø See NAM1 The NAM3 setup program is the same as ÆNAM1 Ø See NAM1 The NAM4 setup program is the same as ÆNAM1 Ø See NAM1 NAM Program 3 Setup NAM2 4 Setup NAM3 ...

Page 12: ...NAM Programming 3 6 Samsung Electronics ...

Page 13: ...tomer s cellular phone F3 Displays SAMSUNG logo To reenter to program mode press F3 key again F5 Write the data of the customer s phone into the EEPROM on the new board F8 Switches from Hands free mode to Diagnostic Monitor mode to allow the data transfer To check this mode from the cellular phone press FCN 9 1 on the key board in sequence ALT X Exits programming and returns to DOS mode 4 4 Operat...

Page 14: ...sage by pressing any key Reading is cancelled The EEPROM data on the phone is not cleared You can restart to read the data U You can clear the error message by pressing any key Writing is cancelled You can restart writing from the beginning U If the program halters or is interrupted for some reasons and you restart the program WRITING IS BEING CARRIED OUT BY USING DATA NOT FINISHED message appears...

Page 15: ... are as follows UCPU INTEL 80186 core inside the MSM UFLASH ROM U129 8 Mbit FLASH MEMORY USRAM U127 2 Mbit STATIC RAM UFLASH ROM U130 1 Mbit FLASH MEMORY UEEPROM U102 128 Kbit SERIAL EEPROM CPU INTEL 80186 CMOS type 16 bit microprocessor is used for the main processing The CPU controls all the circuitry For the CPU clock 27MHz resonator is used FLASH ROM One 8 MBIT FROM is used to store the termin...

Page 16: ...used in CDMA RX mode UFMCLK TXclock used in FM mode ADC Interface ADC_CLK pin 3 ADC_ENABLE pin 1 and ADC_DATA pin 2 are required to control the internal ADC in the BBA Data Port Interface Includes the UART Also supports Diagnostic Monitor DM HP equipment interface down loading and data service CODEC Interface The MSM outputs 2 048 MHz PCM_CLK pin 19 and 8 KHz CODEC_SYNC pin 16 20 to the CODEC U117...

Page 17: ... speaker unit TX WBD ST SAT These signals are generated from MSM The modulation level of TX WBD and ST is 8 kHz dev and SAT is 2 kHz dev BUZZER DRIVING CIRCUITY Buzzer generates alert tone when the buzzer receives the timer signal from the MSM it generates alert tone The buzzer level is adjusted by the alert signal s period generated from the MSM timer KEY TONE GENERATION Ringer signal pin49 out f...

Page 18: ...5 38 MHz IF signal 85 38 MHz IF signal is made by subtracting 881 æ12 5 MHz RF signal from 966 æ12 5 MHz first local signal AUTOMATIC GAIN CONTROLLER AGC AMP U303 85 38 MHz IF signal is applied to IF AGC amp the IF AGC output level is applied to BBA Baseband Analog ASIC The IF AGC amp U302 keeps the signal at a constant level by controlling the gain Dynamic range is 90dB up gain 45dB and down gain...

Page 19: ...OLTAGE CONTROLLED TEMPERATURE COMPENSATED CRYSTAL OSCILLATOR VC TCXO U343 It provides 19 68 MHz reference frequency to PLL A correct frequency tuning is made by the voltage control DUPLEXER F301 Duplexer F301 controls to transmit through the antenna only the signals within acceptable Tx frequency range 836 æ12 5 MHz and to receive through the antenna only the signals within acceptable Rx frequency...

Page 20: ...eceives the first local signal to generate 836 æ12 5 MHz from the BBA 836 æ12 5 MHz signal comes out of the mixer output by subtracting 130 MHz IF signal from 966 æ12 5 MHz first local signal RF AUTOMATIC GAIN CONTROLLER AMP U461 U464 The signal out to the base station should be a constant level The TX RF AGC amp controls power to keep the signal at a constant level RF BAND PASS FILTER BPF F451 Th...

Page 21: ...e power applies to the primary the secondary and third will be off When the primary is power off the saved power will apply to the secondary and U1 D1 D2 is a snubber circuitry and absorbs the counter voltage which comes out when the primary winding is off STATIC ELECTRICAL CURRENT CIRCUITRY The electric current which flows on the secondary winding is detected by R25 The current will be converted ...

Page 22: ...4 2V comes out The voltage will be compared with the reference input voltage of pin 5 and feedback to the primary by U2 U24 B output voltage is linked to U24 A output It turns Q36 off Consequently if either one of these static voltage or static current overflows it will automatically turn U2 off R45 and C36 are used to compensate the phase difference caused by the time delay Since the Vd is mainta...

Page 23: ...sed to detect the ambient temperature It has a linear characteristic by R51 and R52 and is measured at the pin 14 of the MPU through U25 MEASURING CHARGING CURRENT The charging current is converted through U23 A to the voltage Vi which is proportional to the current The noise of Vi is eliminated with R71 and C30 Finally the voltage Vi is measured at the pin 12 of the MPU AUTONOMOUS TIMER If the MP...

Page 24: ...Circuit Description 5 10 Samsung Electronics ...

Page 25: ...Samsung Electronics 6 1 6 Exploded View and it s Par ts List 6 1 Fixed Phone Exploded View 6 2 Fixed Phone Parts List 6 3 Rapid Charger Exploded View 6 4 Cradle Dummy Ass y Cigar Lighter Adapter ...

Page 26: ...Exploded View and its Parts List 6 2 Samsung Electronics 6 1 Fixed Phone Exploded View ...

Page 27: ...Volume Key GH72 40626A 5 Key Pad GH72 41317B 6 Antenna GH42 10511A 7 Motor Ass y GH96 01029A 8 Rear Case GH75 11130A 9 Screw 6001 001046 10 Key Pad Ass y GH59 10020A 11 Shield Can GH72 41445A 12 Main PBA GH72 41406A 13 Battery GH94 00791A NO DESCRIPTION SEC CODE GH43 10307A GH43 10062A Medium Extended life Blue Red Black Dark Gray REMARK GH75 11129B GH75 11129C GH75 11129D ...

Page 28: ...Exploded View and its Parts List 6 4 Samsung Electronics 6 3 Rapid Charger Exploded View SEC CODE GH96 01053A ...

Page 29: ...Exploded View and its Parts List Samsung Electronics 6 5 6 4 Cradle Dummy Ass y Cigar Lighter Adapter SEC CODE GH75 11215A ...

Page 30: ...6 6 Samsung Electronics Exploded View and its Parts List ...

Page 31: ......

Page 32: ......

Page 33: ......

Page 34: ...1 000218 TR SMALL SIGNAL Q108 Q114 Q102 POWER 0501 000218 TR SMALL SIGNAL Q301 RX 0501 000218 TR SMALL SIGNAL Q451 TX 0501 000457 TR SMALL SIGNAL Q113 AUDIO 0501 000457 TR SMALL SIGNAL Q109 Q115 POWER 0501 000689 TR SMALL SIGNAL Q304 RX 0501 002063 TR SMALL SIGNAL Q303 RX 0504 000167 TR DIGITAL Q119 AUDIO 0504 000167 TR DIGITAL Q481 Q482 TX 0504 000168 TR DIGITAL Q103 Q121 POWER 0504 000172 TR DIG...

Page 35: ...3 001256 IC VOLTAGE REGULATOR U382 RX 1203 001285 IC VOLTAGE REGULATOR U483 TX 1203 001335 IC VOLTAGE REGULATOR U124 POWER 1203 001396 IC PWM CONTROLLER U123 POWER 1204 001106 IC ASP U117 AUDIO 1204 001113 IC IF CIRCUIT U401 TX 1205 001196 IC LIN MODEM U101 LOGIC 1205 001253 IC MIXER U460 TX 1209 000142 IC SYNTHESIZER U342 RX 1209 001078 IC PLL SYNTHESIZER U402 TX 1404 001040 THERMISTOR NTC R498 R...

Page 36: ...207 R157 R159 2007 000148 R CHIP 10K 1 16W R180 R182 R183 R185 POWER 2007 000148 R CHIP 10K 1 16W R178 U485 POWER 2007 000148 R CHIP 10K 1 16W R337 R305 RX 2007 000148 R CHIP 10K 1 16W R406 R407 R413 R415 R462 TX R464 R460 R414 R485 R473 R496 2007 000149 R CHIP 12K 1 16W R103 POWER 2007 000151 R CHIP 15K 1 16W R208 POWER 2007 000151 R CHIP 15K 1 16W R307 RX 2007 000152 R CHIP 20K 1 16W R133 R134 L...

Page 37: ...IP 0 1 16W R364 C318 R316 R344 RX 2007 000171 R CHIP 0 1 16W R425 R408 R409 R418 TX 2007 000172 R CHIP 10 1 16W R306 R356 R350 R347 R348 RX R339 R341 2007 000172 R CHIP 10 1 16W R401 R419 TX 2007 000772 R CHIP 33K 1 1 16W R121 POWER 2007 000775 R CHIP 33K 1 16W R163 LOGIC 2007 000775 R CHIP 33K 1 16W R104 POWER 2007 000831 R CHIP 39K 1 16W R135 AUDIO 2007 000831 R CHIP 39K 1 16W R177 POWER 2007 00...

Page 38: ...R335 RX 2007 002797 R CHIP 560 1 16W R452 TX 2007 002965 R CHIP 15 1 16W R313 RX 2007 003030 R CHIP 91 1 16W R304 RX 2007 007001 R CHIP 3 9K 1 16W R160 R161 AUDIO 2007 007001 R CHIP 3 9K 1 16W R168 LOGIC 2007 007001 R CHIP 3 9K 1 16W R179 POWER 2007 007001 R CHIP 3 9K 1 16W R479 TX 2007 007021 R CHIP 75K 1 16W R112 POWER 2007 007131 R CHIP 13K 1 1 16W R488 TX 2007 007132 R CHIP 15K 1 1 16W R489 TX...

Page 39: ...437 C435 C433 C431 TX C452 C495 C490 2203 000254 C CHIP 10NF 1005 C492 C481 C487 C486 C443 TX C483 C455 C470 2203 000254 C CHIP 10NF 1005 C471 C472 C473 C418 C457 TX C484 C441 C477 2203 000278 C CHIP 10PF 1005 C342 C313 C316 RX 2203 000359 C CHIP 150PF 1005 C453 TX 2203 000386 C CHIP 15PF 1005 C303 RX 2203 000438 C CHIP 1N 1005 CX304 AUDIO 2203 000438 C CHIP 1NF 1005 C125 C101 C140 C190 LOGIC 2203...

Page 40: ... CHIP 470PF 1005 C144 LOGIC 2203 000941 C CHIP 470PF 1005 CX103 LOGIC 2203 000941 C CHIP 470PF 1005 C335 C329 CX002 RX 2203 000995 C CHIP 47PF 1005 C463 C458 C404 C405 TX 2203 001033 C CHIP 5 6NF 1005 C153 AUDIO 2203 001124 C CHIP 680PF 1005 C133 C132 AUDIO 2203 001153 C CHIP 68PF 1005 C135 C147 LOGIC 2203 001153 C CHIP 68PF 1005 C337 RX 2203 001201 C CHIP 7PF 1005 C304 RX 2203 001210 C CHIP 8 2NF...

Page 41: ...4 AUDIO 2404 000167 C TA 2 2UF 16V C482 TX 2404 000222 C TA 33UF 16V C382 RX 2404 000232 C TA 4 7UF 10V C163 C165 C164 POWER 2404 000274 C TA 1 5UF 16V C416 TX 2404 000278 C TA 100UF 10V C440 TX 2404 000312 C TA 470NF 16V C350 RX 2404 001032 C TA 33UF 6 3V C123 AUDIO 2404 001032 C TA 33UF 6 3V C104 C119 POWER 2703 000109 INDUCTOR 100NH L309 RX 2703 000109 INDUCTOR 100NH L404 TX 2703 000195 INDUCTO...

Page 42: ...1409 INDUCTOR 12NH L304 RX 2703 001413 INDUCTOR 27NH L453 L454 L456 TX 2703 001563 INDUCTOR 10UH L101 POWER 2802 001048 RESONATOR 27MHz X101 LOGIC 2806 001146 OSCILLATOR VCTCXO U341 RX 2809 001205 OSCILLATOR VCTCXO 19 68M U343 RX 2904 000297 FILTER SAW 85 38MHz F303 RX 2904 001011 FILTER SAW 881 5MHz F302 RX 2904 001012 FILTER SAW 836 5MHz F451 TX 2909 001004 FILTER DUPLEXER 881MHz F301 RX 3710 00...

Page 43: ...Samsung Electronics 8 1 8 Troubleshoot ing 8 1 Logic Section 8 1 1 No Power ...

Page 44: ...Troubleshooting 8 2 Samsung Electronics 8 1 2 Abnormal Initial Operation Normal 3 3V voltage source ...

Page 45: ...Samsung Electronics 8 3 Troubleshooting 8 1 3 Abnormal Backlight Operation ...

Page 46: ...Troubleshooting 8 4 Samsung Electronics 8 1 4 Abnormal Key Data Input ...

Page 47: ...Samsung Electronics 8 5 Troubleshooting 8 1 5 Abnormal Keytone ...

Page 48: ...Troubleshooting 8 6 Samsung Electronics 8 1 6 Abnormal Alert Tone ...

Page 49: ...Samsung Electronics 8 7 Troubleshooting 8 2 RF Section 8 2 1 RF Secton Troubleshooting ...

Page 50: ...Troubleshooting 8 8 Samsung Electronics 8 2 2 Receiver Part ...

Page 51: ...Samsung Electronics 8 9 Troubleshooting 8 2 3 Transmitter Part ...

Page 52: ...Troubleshooting 8 4 Desk Top charger 8 4 1 Check 1 8 10 Samsung Electronics ...

Page 53: ...Troubleshooting Samsung Electronics 8 11 ...

Page 54: ...8 4 2 Check 2 Troubleshooting 8 12 Samsung Electronics ...

Page 55: ...8 4 3 Check 3 Troubleshooting Samsung Electronics 8 13 ...

Page 56: ...Troubleshooting 8 14 Samsung Electronics ...

Page 57: ...0 T_LAMP_ON_I Turn on the LAMP 28 97 0 0 T_LAMP_OFF_I Turn off the LAMP 29 9A 0 0 T_REBUILD_I Rebuild EEPROM 30 15 15 0 T_PLINE_I Display and return Production data 34 A2 0 0 T_CDATA_I Transmit continuous 5 word Reverse CTL CH message 35 A3 3 0 T_VOLUME_UP_I Increase value of the last command Only for autotest 36 A4 3 0 T_VOLUME_DOWN_I Decrease value of the last command Only for autotest 48 B4 3 0...

Page 58: ...0 F0 4 0 T_HW_CHANFLAT_T Measure the feature of the channel deviation before adjusting 91 F2 4 0 T_SW_CHANFLAT_T Check the feature of the channel deviation applied channel deviation algorithm after adjusting 93 F3 4 0 T_CH_FLATLESS_I Setting 22dBm channel deviation 10 Points Signal Name Description 1 The AB Input Argument Byte Number values of these commands are used only in the manual test In aut...

Page 59: ...msung Electronics 10 1 10 1 Block Diagram 10 2 Circuit Diagram 10 2 1 Power Circuit Diagram 10 2 2 Audio Circuit Diagram 10 2 3 RX Circuit Diagram 10 2 4 TX Circuit Diagram 10 2 5 Logic Circuit Diagram 10 2 6 Memory Circuit Diagram ...

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