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Samsung SCH-A105 Service Manual

Cdma cellular phone
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SERVICE
CDMA Cellular Phone
CDMA Cellular Phone
SCH-A105
Manual
CONTENTS
1. General Introduction

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Summary of Contents for Samsung SCH-A105

  • Page 1: Table Of Contents

    CDMA Cellular Phone SCH-A105 SERVICE Manual CDMA Cellular Phone CONTENTS 1. General Introduction 2. Specification 3. Installation 4. NAM Programming 5. Product Support Tools 6. Troubleshooting 7. Exploded view and its Part List 8. Electrical Parts List 9. Block diagram 10.
  • Page 2 ELECTRONICS ©Samsung Electronics Co.,Ltd. July. 2000 Printed in Korea. Code No.: GH68-01246A BASIC.
  • Page 3 1. General Description The SCH-A105 cellular phone functions as both analog cellular phone working in AMPS (Advanced Mobile Phone Service) mode and digital cellular phone working in CDMA (Code Division Multiple Access) mode. CDMA type digital mode applies DSSS (Direct Sequential Spread Spectrum) mode which first came to be used in the military.

  • Page 4: Specification

    80 x 42 x 24 Operating Time (Digital Mode) Item Standby Time Talk Time Slim battery up to 100 hours up to 150 min Standard battery up to 170 hours up to 250 min SAMSUNG Proprietary-Contents may change without notice...

  • Page 5: Digital Mode

    -61 dBm Test1: ±24 dB or less Test2: 0 mS ~ 2.5 mS Closed Loop Tx Power Control Range Test3: ±24 dB or more Test4: ±24 dB or more Test5: ±24 dB or more SAMSUNG Proprietary-Contents may change without notice...
  • Page 6 63 +10 LOG (PY) dB f0+45KHz ~ f0+60KHz (where f0=carrier frequency f0+60KHz ~ f0+90KHz PY=mean output power in watts) f0+90KHz ~ 2f0 below 43 + 10 LOG (PY) dB Harmonic and conducted Spurious Emissions SAMSUNG Proprietary-Contents may change without notice...
  • Page 7 Frequency Range -45dBm 25 ~ 70 MHz -41dBm 70 ~ 130MHz -41 ~ -32dBm 130 ~ 174 MHz -32dBm 174 ~ 260 MHz -32 ~ -26dBm 260 ~ 470 MHz -21dBm 470 ~ 1GHz SAMSUNG Proprietary-Contents may change without notice...
  • Page 8 9 : TEx : Tx vocoder rate (8 is full rate, 1 is 1/8th rate) E : EVRC V : 13k or 8k 10 : REx : Rx vocoder rate (8 is full rate, 1 is 1/8th rate) 11 : xx : Walsh code used in traffic channel SAMSUNG Proprietary-Contents may change without notice...

  • Page 9: Installation

    ( ), then slide the battery down ( ). Push up and hold the catch above the battery on the back of the phone ( ) and lift the battery away. ( SAMSUNG Proprietary-Contents may change without notice...
  • Page 10 Figure 3-1 Charging the Phone and Battery SPECIFICATIONS USING “DTCA10” Battery Type Slim Battery Standard Battery (Li-ion, 500 mAh) (Li-ion, 1000 mAh) Model Name BTIA10AA BTSA10AA BTIA10AD BTSA10AD SEC Code GH43-00173B GH43-00174B GH43-00179B GH43-00180B Charging Time 4 hours 4 hours SAMSUNG Proprietary-Contents may change without notice...
  • Page 11 3-3-2 Hands-Free Box 1. Drill holes in a proper location for the hands-free box, attach the mounting bracket by using the screws. See the figure 3-3. 2. Install the hands-free box into the bracket. SAMSUNG Proprietary-Contents may change without notice...
  • Page 12 Normal place is the sun visor. 2. Once the microphone has been correctly positioned, connect the microphone wire to the MIC jack on the hands-free box. MOUNTING BRACKET Figure 3-3 Hands-Free Box 1 Installation SAMSUNG Proprietary-Contents may change without notice...
  • Page 13 Make sure the connection, in the vehicle, between the battery (-) terminal and vehicle chassis is made correctly. Make sure the fuse having a proper capacity is used on the power cable. Make sure the cables do not pass over any sharp metal edge that may damage it. SAMSUNG Proprietary-Contents may change without notice...

  • Page 14: Nam Programming

    -stores it. Pref NAM1... -Preferred system selection for NAM1 Digital pref changes the system. -stores it. Pref NAM2... -Preferred system selection for NAM2 Digital pref changes the system. -stores it. SAMSUNG Proprietary-Contents may change without notice...
  • Page 15 Acquisition system ID 2, Current status is displayed. - to change, enter new one. - store it. FM Acq SID3 ID number Acquisition system ID 3, Current status is displayed. - to change, enter new one. - store it. SAMSUNG Proprietary-Contents may change without notice...
  • Page 16 Lock system ID 6, current status is displayed. - to change, enter new one. - store it. Auto Reg * or # FM Registration, current status is displayed. - changes the status ‘YES’ to enable, ‘NO’ to disable - store it. SAMSUNG Proprietary-Contents may change without notice...
  • Page 17 -Second channel currently used under system A to change, enter new one. -stores it. Schn Sys B channel number -Second channel currently used under system B to change, enter new one. -stores it. SAMSUNG Proprietary-Contents may change without notice...
  • Page 18 CD lockSID 6 ID number -6th lock system ID,current status is displayed. to change, enter new one. -stores it. CDMA Home SID <or> -CDMA Home system ID, current status is displayed changes the status. -stores it. SAMSUNG Proprietary-Contents may change without notice...
  • Page 19 -stores it. 4-3 Setting Up NAM 2 LCD Display Key in Function NAM Program -Choose ‘Setup NAM2’ 1:General 2:Setup NAM1 3:Setup NAM2 The NAM2 setup program is the same as ‘NAM1’ SAMSUNG Proprietary-Contents may change without notice...

  • Page 20: Product Support Tools

    IMPORTANT INFORMATION Purpose The Product Support Tool (PST) offers you the ability to interface with the SAMSUNG CDMA 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 1.xx.
  • Page 21 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 CDMA portable telephone. You can select serial port COM1 or COM2. 5-2-2 Operation Procedure Service Programming The Service Programming screens enable you to set and change the service activation parameters of the phones.
  • Page 22 3.Click Mode Select box, then Select SERVICE MODE?to return to the Service Mode Screen. NOTE: DO NOT POWER OFF WHILE THE PHONE IS BEING DOWNLOADED! SAMSUNG Proprietary-Contents may change without notice...

  • Page 23: Test Procedure

    CAUTION : Because there is the loss (0.33V at Max Power) of the test jig and Data cable, you’d better input 3.93V to the DC Power Supply to use 3.6V (Battery normal voltage) at Cellular phone Items needed to purchase from SAMSUNG ITEMS...

  • Page 24: Test Jig

    CONNECT TO HP SERIAL PORT A-OUT A-IN PROBE NOT USED CONNECT TO CONNECT TO AUDIO OUT PORT OF AUDIO IN PORT OF TEST EQUIPMENT TEST EQUIPMENT (USE BNC CABLE) (USE BNC CABLE) TEST CABLE SAMSUNG Proprietary-Contents may change without notice...
  • Page 25 Dsub 25 PIN CONNECTOR PIN DESCRIPTION (TEST CABLE 1, BACK SIDE) DATA DESCRIPTION Dsub CONN. DATA DESCRIPTION Dsub CONN. PIN NO. PIN NO. 12,21 DP_RX_DATA DGND 2,4,6,13,19 HP_PWR BATT 15,16,22 3,20 TX_AUDIO DP_TX_DATA RX_AUDIO SAMSUNG Proprietary-Contents may change without notice...
  • Page 26 F. “7 2 2 7 5 #” : Output RF power level setting. “275” means AGC level and AGC level range is from 0 to 511. G. “1 0 2” : RF Power level control, 2(0~7) means power level . SAMSUNG Proprietary-Contents may change without notice...

  • Page 27: Test Command Table

    LAMP on LAMP_OFF LAMP off REBUILD Rebuilding EEPROM PLINE Product lile information SATON turn on SAT SATOFF turn off SAT CDATA continuously sen TX Control data VOLUME_UP Electric Volume Up VOLUME_DOWN Electric Volume Down SAMSUNG Proprietary-Contents may change without notice...
  • Page 28 BATT CDMA_TXADJ sets tx_agc_adj for cdma mode FM_TXADJ sets tx_agc_adj for fm mode SET_PA_RO set TX power AMP ctrl RO JOJ_98.06.29 OFF_PA_RO off TX power AMP ctrl RO JOJ_98.06.29 READ_RSSI read a RSSI SAMSUNG Proprietary-Contents may change without notice...
  • Page 29 EVRC Check Mode kjg_980417_evrc SVC_LED SVC_LED control hjkim_990113 TXRAS_ADJ TX RAS adj = TXRAS offset arry RXRAS_ADJ RX RAS adj = RXRAS offset arry HW_CHANFLAT SW_CHANFLAT CH_FLATNESS FM_TX_PWR setting the volume for power Level 2-7 TEMP SAMSUNG Proprietary-Contents may change without notice 5-10...

  • Page 30: Troubleshooting

    R115 & Q102. Check U105, R188, C165 & R112 U104 pin9p=‘H’? and its neighboring circuits. Check Q104 and its neighboring Q104 collector=‘L’? circuits. Check U201 and its neighboring U201 pin 1 output circuits. =3.0V? SAMSUNG Proprietary-Contents may change without notice...
  • Page 31 U101 pin P6 and U401 pin79. from U401 pin 38? Check the LED and its neighboring LED ON? circuit. Replace if required. Check the LCD pins and its Normal initial neighboring circuit. display on LCD? Replace if required. SAMSUNG Proprietary-Contents may change without notice...
  • Page 32 Check Q108 & Q107 and its ‘H’ level neighboring circuits. from U101 pin7L drive Replace if required Q108 & Q107? Check U104 pin 13p ‘L’ level from U104 pin13p? Backligh LED or LCD on SAMSUNG Proprietary-Contents may change without notice...
  • Page 33 6-1-4 Abnormal Key Data Input Check initial status Scanning signals Check U104 pins output from U104 pins 4A, 4A,4B,5A,5C,5D,6C,5E 4B,5A,5C,5D,6C, 5E.? Check U104 pin 2A,4C, and 3B Check CON J1. Normal key data input? Replace the keypad assembly SAMSUNG Proprietary-Contents may change without notice...
  • Page 34 6-1-5 Abnormal Key Tone Check initial status Scanning signals Check U104 pins ouput from U104 pins 4A,4B,5A,5C,5D,6C,5E. 4A,4B,5A,5C,5D,6C, 5E.? Check U104 pins 2A,4C and 3B. Check CON J1. Normal Key data input? Replace the Keypad assembly. SAMSUNG Proprietary-Contents may change without notice...

  • Page 35: Transmitter Section

    Check U304 Check Q503 Check U304 Power level. U504 Local Input Tx IF Level? Level? Tx IF Level? Level? CDMA:0 dBm Gain: -15 dBm Gain: + 20 dB Gain: + 28 dB Gain: 0 dBm SAMSUNG Proprietary-Contents may change without notice...

  • Page 36: Receiver Section

    BUFFER OUTPUT: - 5 dBm Check IF AMP Check IF AMP in/output OK? power OK? Gain: +19 dB Check IF filter Check IF filter in/output OK? solderling Loss: -10 dB RF Rx FM OK BBA INPUT: -52 dBm SAMSUNG Proprietary-Contents may change without notice...
  • Page 37 Troubleshooting 6-4 RF Section Start CDMA mode Normal CDMA Check CDMA RX path SVC & ROAM OK? Setup CDMA Check Transmitter call. OK? Measure CDMA FER Normal CDMA RF? SAMSUNG Proprietary-Contents may change without notice...
  • Page 38 7. Exploded View and its Parts List 7-1 Cellular phone Exploded View SAMSUNG Proprietary-Contents may change without notice...

  • Page 39: Exploded View And Its Part List

    SCREW MACHINE 6001-001057 6001-001057 SUA, REAR COVER GH75-00149B GH75-00149A ANTENNA GH42-00015B GH42-00015B KEY PAD GH73-00085F GH73-00085F VOLUME KEY GH72-00300C GH72-00300C EAR JACK COVER GH72-00301A GH72-00301A SUA, FRONT CASE GH75-00525B GH75-00525A RF JACK DUMMY GH73-00083A GH73-00083A SAMSUNG Proprietary-Contents may change without notice...
  • Page 40 Exploded view and its Part List 7-2 Desk-Top Rapid Charger Ass’y TYPE SEC. CODE Remark GH44-00104D Brazil GH44-00104C Mexico 7-3 Travel Charger Ass’y (TC010, GH44-00080B) 7-4 Cigarette Lighter Adaptor Ass’y (CLC020, GH44-00070A) SAMSUNG Proprietary-Contents may change without notice...

  • Page 41: Cradle Exploded View

    Exploded view and its Part List 7-5 Hands Free Kit Ass’y 7-6 Cradle Exploded View SAMSUNG Proprietary-Contents may change without notice...

  • Page 42: Electricalpartslist

    8.ElectricalPartsList SEC CODE Design LOC ITEMS DESCRIPTIONS Level SCH-A105G/TCL 3001-001103 SPEAKER 0.05W, 32ohm, 111dB, - 3003-001034 MIC-CONDENSOR 2V, 130UA-500UA, -44DB+-3DB, 2.2KOHM GH42-00015B ANTENNA-SCHA100 SCH-A100, 824-849MHz, 0/-3DBD, 50OHM GH43-00173B BATTERY-500mA, L/GRY, ISR, MAIN 3.7V, 540mAh, -, 540mA, 4.2V GH43-00174B BATTERY-1000M, L/GRY, ISR, MAIN 3.6V, 915mAH, -, 965mAH, - GH44-00104D CHARGER-DTCA101...
  • Page 43 SCH-A100, PC, BLK, -, - GH74-00150A MPR-TAPEMAGNETICHODER SCH-A100, TESA, T0.2, TRP, - GH92-00824A PBAMAIN-IFC2 IFC2, -, KORA, MAINPBA, -, -, - 0405-001035 D402 DIODE-VARACTOR 1SV279, 15V, 3nA, USC, TP 0405-001035 D403 DIODE-VARACTOR 1SV279, 15V, 3nA, USC, TP SAMSUNG Proprietary-Contents may change without notice...
  • Page 44 -, P, -12V, +-2.5A, 0.1ohm, 1W, TSSO 0505-001119 Q402 FET-SIL ICON 2SK2685, P, 6V, 20mA, -, 100mW, CMPA 0505-001165 Q110 FET-SIL ICON SI3443DV, P, -20V, +-3.5mA, 65mohm 0505-001165 Q501 FET-SIL ICON SI3443DV, P, -20V, +-3.5mA, 65mohm SAMSUNG Proprietary-Contents may change without notice...
  • Page 45 R-CHIP 100ohm, 5%, 1/16W, DA, TP, 1005 2007-000138 R302 R-CHIP 100ohm, 5%, 1/16W, DA, TP, 1005 2007-000139 R416 R-CHIP 220ohm, 5%, 1/16W, DA, TP, 1005 2007-000140 R110 R-CHIP 1kohm, 5%, 1/16W, DA, TP, 1005 SAMSUNG Proprietary-Contents may change without notice...
  • Page 46 R-CHIP 10kohm, 5%, 1/16W, DA, TP, 1005 2007-000151 R134 R-CHIP 15kohm, 5%, 1/16W, DA, TP, 1005 2007-000153 R100 R-CHIP 22kohm, 5%, 1/16W, DA, TP, 1005 2007-000153 R123 R-CHIP 22kohm, 5%, 1/16W, DA, TP, 1005 SAMSUNG Proprietary-Contents may change without notice...
  • Page 47 R-CHIP 470kohm, 5%, 1/16W, DA, TP, 1005 2007-000170 R209 R-CHIP 1Mohm, 5%, 1/16W, DA, TP, 1005 2007-000172 R301 R-CHIP 10ohm, 5%, 1/16W, DA, TP, 1005 2007-000172 R305 R-CHIP 10ohm, 5%, 1/16W, DA, TP, 1005 SAMSUNG Proprietary-Contents may change without notice...
  • Page 48 R-CHIP 16ohm, 5%, 1/16W, DA, TP, 1005 2007-003010 R306 R-CHIP 20ohm, 5%, 1/16W, DA, TP, 1005 2007-003023 R514 R-CHIP 62kohm, 5%, 1/16W, DA, TP, 1005 2007-003112 R320 R-CHIP 27ohm, 5%, 1/16W, DA, TP, 1005 SAMSUNG Proprietary-Contents may change without notice...
  • Page 49 0.1nF, 5%, 50V, NP0, TP, 1005 2203-000233 C302 C-CERAMIC, CHIP 0.1nF, 5%, 50V, NP0, TP, 1005 2203-000233 C304 C-CERAMIC, CHIP 0.1nF, 5%, 50V, NP0, TP, 1005 2203-000233 C305 C-CERAMIC, CHIP 0.1nF, 5%, 50V, NP0, TP, 1005 SAMSUNG Proprietary-Contents may change without notice...
  • Page 50 10nF, 10%, 16V, X7R, TP, 1005, - 2203-000254 C128 C-CERAMIC, CHIP 10nF, 10%, 16V, X7R, TP, 1005, - 2203-000254 C137 C-CERAMIC, CHIP 10nF, 10%, 16V, X7R, TP, 1005, - 2203-000254 C150 C-CERAMIC, CHIP 10nF, 10%, 16V, X7R, TP, 1005, - SAMSUNG Proprietary-Contents may change without notice...
  • Page 51 2203-000254 C503 C-CERAMIC, CHIP 10nF, 10%, 16V, X7R, TP, 1005, - 2203-000254 C505 C-CERAMIC, CHIP 10nF, 10%, 16V, X7R, TP, 1005, - 2203-000254 C506 C-CERAMIC, CHIP 10nF, 10%, 16V, X7R, TP, 1005, - SAMSUNG Proprietary-Contents may change without notice 8-10...
  • Page 52 2203-000438 C307 C-CERAMIC, CHIP 1nF, 10%, 50V, X7R, TP, 1005, - 2203-000438 C408 C-CERAMIC, CHIP 1nF, 10%, 50V, X7R, TP, 1005, - 2203-000438 C409 C-CERAMIC, CHIP 1nF, 10%, 50V, X7R, TP, 1005, - SAMSUNG Proprietary-Contents may change without notice 8-11...
  • Page 53 0.002nF, 0.25pF, 50V, NP0, TP, 1005 2203-000714 C127 C-CERAMIC, CHIP 3.3nF, 10%, 50V, X7R, TP, 1005, - 2203-000725 C316 C-CERAMIC, CHIP 3.9nF, 10%, 50V, X7R, TP, 1005, - 2203-000812 C404 C-CERAMIC, CHIP 0.033nF, 5%, 50V, NP0, TP, 1005 SAMSUNG Proprietary-Contents may change without notice 8-12...
  • Page 54 100nF, +80-20%, 16V, Y5V, TP, 1005 2203-005061 C126 C-CERAMIC, CHIP 100nF, +80-20%, 16V, Y5V, TP, 1005 2203-005061 C134 C-CERAMIC, CHIP 100nF, +80-20%, 16V, Y5V, TP, 1005 2203-005061 C160 C-CERAMIC, CHIP 100nF, +80-20%, 16V, Y5V, TP, 1005 SAMSUNG Proprietary-Contents may change without notice 8-13...
  • Page 55 10uF, 20%, 6.3V, GP, TP, 2012 2404-001105 C318 C-TA, CHIP 10uF, 20%, 6.3V, GP, TP, 2012 2404-001105 C412 C-TA, CHIP 10uF, 20%, 6.3V, GP, TP, 2012 2404-001105 C435 C-TA, CHIP 10uF, 20%, 6.3V, GP, TP, 2012 SAMSUNG Proprietary-Contents may change without notice 8-14...
  • Page 56 22nH, 5%, 1x0.5x0.5mm 2703-001752 L407 INDUCTOR-SMD 39nH, 5%, 1.0x0.5x0.5mm 2703-001752 L423 INDUCTOR-SMD 39nH, 5%, 1.0x0.5x0.5mm 2703-001769 L450 INDUCTOR-SMD 220NH, 5%, 2.0X1.25X1.2mm 2703-001953 L404 INDUCTOR-SMD 6.8nH, 5%, 1.0x0.5x0.5mm 2703-001953 L409 INDUCTOR-SMD 6.8nH, 5%, 1.0x0.5x0.5mm SAMSUNG Proprietary-Contents may change without notice 8-15...
  • Page 57 2P, 2.6PI, AuF, BLK, - 4709-001080 L303 RF POWER SPLITTER 2WAY, 955-979MHz, 12dB, -, TP GH41-00102A PCB PCB-SCH-A105 SCH-A105, FR-4, 0.7T, 118 x 90, - GH96-01124A EAR-MIC ELAETC-EARPHONE SCH-2000, SPRINT, USA, 20mW, 32ohm SAMSUNG Proprietary-Contents may change without notice 8-16...

  • Page 58: Block Diagram

    9. Block Diagrams SAMSUNG Proprietary-Contents may change without notice...

  • Page 59: Pcb Diagrams

    10. PCB Diagrams 10-1 Main PCB Top View SAMSUNG Proprietary-Contents may change without notice 10-1...
  • Page 60 PCB diagrams 10-2 Main PCB Bottom View SAMSUNG Proprietary-Contents may change without notice 10-2...

  • Page 61: Circuit Diagrams

    C h a ng e d : Pa g e : QA C HK : D r a w i n g N u m b e r : 2. 4 SAMSUNG Proprietary-Contents may change without notice 11-1...
  • Page 62 2 0 0 0 . 5 . 4 Ti m e C h a ng e d: D r a w i n g N u m b e r : 2. 4 SAMSUNG Proprietary-Contents may change without notice 11-2...
  • Page 63 Ti m e C h a ng e d : QA C HK : Dr a w i n g N u m b e r : P a g e : MS J 2. 4 SAMSUNG Proprietary-Contents may change without notice 11-3...

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