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SmartTrunk Systems ST-2112D Service Manual

Uhf fm digital transceiver 450mhz ~ 520mhz
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ST-2112D
(450Mhz ~ 520Mhz)
UHF FM DIGITAL TRANSCEIVER
SERVICE MANUAL
SmarTrunk Systems, INC.
ST-2112D SM R1.2

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Summary of Contents for SmartTrunk Systems ST-2112D

  • Page 1 ST-2112D (450Mhz ~ 520Mhz) UHF FM DIGITAL TRANSCEIVER SERVICE MANUAL SmarTrunk Systems, INC. ST-2112D SM R1.2...

  • Page 2: Table Of Contents

    Alignment Procedure ......................14 5.3.1. GENERAL ALIGNMENT CONSIDERATIONS: ................14 5.4. MAIN RADIO ALIGNMENT ....................... 15 5.5. TRANSMITTER ALIGNMENT: ....................15 5.5.1. Main Clock alignment: ......................16 5.5.2. Transmit Power alignment: ....................17 ST-2112D SM R 1.2 SMARTRUNK SYSTEMS, INC.
  • Page 3 SQUELCH LEVEL: ........................27 7.1.7. DISABLE RF POWER ......................27 RADIO APPEARANCE ALIGNMENT ....................28 8.1. DISPLAYS AND LEDS: ....................... 28 8.1.1. Auto backlight delay alignment: ..................28 8.1.2. Power on Text: ........................28 ST-2112D SM R 1.2 SMARTRUNK SYSTEMS, INC.
  • Page 4 ST-2112 PCB POWER LAYER ......................39 ST-2112 FRONT BOARD COMPONENT LOCATOR (TOP LAYER) ............40 ST-2112 FRONT BOARD COMPONENT LOCATOR (BOTTOM LAYER)..........41 ST-2112D BOM ..........................42 ST-2112 KEYBOARD & DISPLAY BOM ....................51 ACCESSORY PORT: ........................... 53 ST-2112 SERVICE MANUAL REVISIONS ................... 55 ST-2112D SM R 1.2...

  • Page 5: Specifications

    Specifications: SPECIFICATION ST-2112C Frequency Range [Mhz] 450 TO 520 Channels Groups/Banks Power [Vdc] 6.4 to 8.8 Dimensions [mm] 130(H)x36(D)x52(W) Weight [gr] (oz) 320 - (11.3) Temperature range - 30 °C ~ 60 °C (-22°F ~ +140°F) Signaling 51 CTCSS tones / 183 DCS tones / 65534 SDR IDs Reverse Burst Display 128x64 (supports international characters)

  • Page 6: St-2112 Exploded View

    ST-2112 EXPLODED VIEW 2 . ST-2112 EXPLODED VIEW ST-2112V Daniel Martin Jack Chang...

  • Page 7: St-2112 Simplified Diagram

    ST-2112 SIMPLIFIED DIAGRAM TX CTRL [U3] Power Final Buffer Ant Sw Driver Detection D1/D3 Radio CLOCK POWER [Y1] CTRL [U2] Audio Processor AUDIO Modem [U5] [U10] G-SENSOR DISPLAY CLOCK Main Processor [Y2] [U8] [U12] FLASH CLOCK MEMORY [Y3] [U4] VOCODER [U6] MEMORY [U7]...
  • Page 8 Notes:...

  • Page 9: St-2112 Rf Description

    Receiver Unit and pass through a qualifying the signal level. If the Low-pass filter, antenna switching signal level is higher than the ST-2112D SM R 1.2 SMARTRUNK SYSTEMS, INC.

  • Page 10: Virtual Volume Control

    (U6). If the received signaling matches The vocoder re-builds the audio the channel programming, then the from the compressed data then main processor (U8) requests the applies filter it, adjust the volume ST-2112D SM R 1.2 SMARTRUNK SYSTEMS, INC.

  • Page 11: Transmitter System

    U1 with a The transmit signal then passes corresponding balance controlled through the antenna switch D1 by software. (BAR63) and is low-pass filtered to suppress harmonic spurious radiation before delivery to the antenna ST-2112D SM R 1.2 SMARTRUNK SYSTEMS, INC.

  • Page 12: Automatic Transmit Power Control

    Q1 and Q17. Evenly when power level is adjusted by software on three levels (Hi, Med, Lo) the power value can be adjusted to any desired value between zero 5Watts alignment software. Notes: ST-2112D SM R 1.2 SMARTRUNK SYSTEMS, INC.

  • Page 13: Rc-2112 Alignment

    Authorized afterwards. Do not attempt to Smartrunk service technicians perform only a single step unless it realign circuits make is clearly isolated electrically from complete performance checks to ST-2112D SM R 1.2 SMARTRUNK SYSTEMS, INC.

  • Page 14: Alignment Procedure

    A 50-Ohm RF Dummy Load and in- line wattmeter must be connected Please be sure you turn the radio on to the main antenna jack in all before continue with this alignment procedures that request procedure. ST-2112D SM R 1.2 SMARTRUNK SYSTEMS, INC.

  • Page 15: Main Radio Alignment

    A complementary message will be For any transmit related alignment displayed on the time the software parameter, low power will be used. detects the radio connected to USB port on the computer. 5.5. TRANSMITTER ALIGNMENT: ST-2112D SM R 1.2 SMARTRUNK SYSTEMS, INC.

  • Page 16: Main Clock Alignment

    Factory 5.5.1. Main Clock alignment: Default. To align the main clock for radio Tx and RX, please select Main Clock Alignment option Alignment screen. ST-2112D SM R 1.2 SMARTRUNK SYSTEMS, INC.

  • Page 17: Transmit Power Alignment

    Please be sure that the PLL is To realign, please select [Start] then locked as soon as you press [Start], move the slider or introduce the ST-2112D SM R 1.2 SMARTRUNK SYSTEMS, INC.

  • Page 18: Mid Power Level Alignment

    Modulation Gain alignment: Maximum deviation analog This is a critical parameter which signals modulated from ST-2112 may not be realigned to different can be aligned by Max Deviation values other than factory default. ST-2112D SM R 1.2 SMARTRUNK SYSTEMS, INC.

  • Page 19: Fdma Data Modulation Alignment

    If you want to retrieve factory default, press [Factory] instead of [Start]. You will be asked to confirm ST-2112D SM R 1.2 SMARTRUNK SYSTEMS, INC.

  • Page 20: Tdma Data Modulation Alignment

    2112 must be aligned by selecting DTMF Level alignment option from the alignment menu. 5.5.7. EIA tones Level Alignment: EIA signaling generated by ST-2112 must be aligned by selecting EIA Tones Level alignment option from the alignment menu. ST-2112D SM R 1.2 SMARTRUNK SYSTEMS, INC.

  • Page 21: Dcs Signaling Alignment

    2112 can be aligned by selecting CTCSS Level alignment option from DCS signaling encoded from ST- the alignment menu. 2112 must be aligned by selecting DCS Level alignment option from the alignment menu. ST-2112D SM R 1.2 SMARTRUNK SYSTEMS, INC.

  • Page 22: Fsk Signaling Alignment

    5.5.11. FSK signaling alignment: align FSK/PSK signaling deviation, select FSK Mod Level on Alignment screen. ST-2112D SM R 1.2 SMARTRUNK SYSTEMS, INC.

  • Page 23: Receiver Alignment

    This is a critical parameter which may not be realigned to different values other than factory default. Under your risk, if you still prefer to realign the overall modulation gain, you must select Discriminator Gain on Alignment screen. ST-2112D SM R 1.2 SMARTRUNK SYSTEMS, INC.

  • Page 24: Complementary Radio Alignment

    This value means the percentage of charge when the radio starts the warning signals to the user (visual and acoustic). soon desired value reached, press [Finish] to store the value on radio memory. ST-2112D SM R 1.2 SMARTRUNK SYSTEMS, INC.

  • Page 25: Complimentary User Alignment

    The value will be updated after the file is transferred to the radio. 7.1.2. ANALOG External Mic Gain: It aligns microphone sensitivity. As soon as you click on Options… the Options screen is popped up: Alignment step is 3.2dB. ST-2112D SM R 1.2 SMARTRUNK SYSTEMS, INC.

  • Page 26: Analog Agc

    (standard voice at 4 inches away from the microphone), or 6.0dB gain external microphone connection, then you must program the Digital Gain at 15.0dB and the external gain on 6.0dB, then check Digital AGC as bellow: ST-2112D SM R 1.2 SMARTRUNK SYSTEMS, INC.

  • Page 27: Minimum Volume Level

    ST-2112D SM R 1.2 SMARTRUNK SYSTEMS, INC.

  • Page 28: Radio Appearance Alignment

    Type here the text to show on the display when the radio is powered This string is very convenient for radio identification dealer advertising at the time the radio is powered on. ST-2112D SM R 1.2 SMARTRUNK SYSTEMS, INC.

  • Page 29: Leds

    Check Squelch mode if you want Check Pre TOT if you want to play radio plays concerning back a tone to allert when time out ST-2112D SM R 1.2 SMARTRUNK SYSTEMS, INC.
  • Page 30 Press OK once you finish the setting desired messages. This feature will be stored into the file then it will be transferred to the radio at the time the file is uploaded to the radio. ST-2112D SM R 1.2 SMARTRUNK SYSTEMS, INC.
  • Page 31 This page left blank intentionally ST-2112D SM R 1.2 SMARTRUNK SYSTEMS, INC.

  • Page 32: St-2112 Schematic

    9. ST-2112 SCHEMATIC RADIO REFERENCES TX5V IRQR PAENA IF COMPONENT IS DIFERENT BETWEEN THE DIFERENT MODELS, THEN Y OU WILL FIND THREE VALUES UNDER THE COMPONENT. C5VT PWR_TUNE TX5V BLUE VALUES CORRESPOND TO ST-2112V TEMP PINK VALUES CORRESPOND TO ST-2112C GREEN VALUES CORRESPOND TO ST-2112V LCB1608-600 150pF...

  • Page 33: St-2112 From Board Schematic

    ST-2112 FROM BOARD SCHEMATIC ACCESY PORT POWER SUPPLY 200mA GPSRX IRQA GPSTX AGND9 HT7233 MOSI GND2 MISO Vout AGND8 GPSRX AGND17 NRES GPSTX AGND18 AGND7 ROW1 ROW2 ROW3 HEADER 18X2 PEB-916 CON8 HT7233 Vout VDDIO MOSI MOSI MISO MISO MOSI INT2 2ABC 3DEF...

  • Page 34: St-2112 Component Locator (Top Layer)

    11 ST-2112 COMPONENT LOCATOR (TOP LAYER)

  • Page 35: St-2112 Component Locator (Bottom Layer)

    12 ST-2112 COMPONENT LOCATOR (BOTTOM LAYER) ST-2112D SM R 1.2 SMARTRUNK SYSTEMS, INC.

  • Page 36: St-2112 Pcb Top Layer

    13 ST-2112 PCB TOP LAYER ST-2112D SM R 1.2 SMARTRUNK SYSTEMS, INC.

  • Page 37: St-2112 Pcb Bottom Layer

    14 ST-2112 PCB BOTTOM LAYER ST-2112D SM R 1.2 SMARTRUNK SYSTEMS, INC.

  • Page 38: St-2112 Pcb Ground Layer

    15 ST-2112 PCB GROUND LAYER ST-2112D SM R 1.2 SMARTRUNK SYSTEMS, INC.

  • Page 39: St-2112 Pcb Power Layer

    16 ST-2112 PCB POWER LAYER ST-2112D SM R 1.2 SMARTRUNK SYSTEMS, INC.

  • Page 40: St-2112 Front Board Component Locator (Top Layer)

    17 ST-2112 FRONT BOARD COMPONENT LOCATOR (TOP LAYER) ST-2112D SM R 1.2 SMARTRUNK SYSTEMS, INC.

  • Page 41: St-2112 Front Board Component Locator (Bottom Layer)

    18 ST-2112 FRONT BOARD COMPONENT LOCATOR (BOTTOM LAYER) ST-2112D SM R 1.2 SMARTRUNK SYSTEMS, INC.

  • Page 42: St-2112D Bom

    CAP 1000PF 50V CERAMIC X7R 0402 CK1102AK5X CAP 1000PF 50V CERAMIC X7R 0402 CK1102AK5X CAP 1000PF 50V CERAMIC X7R 0402 CK1102AK5X CAP 1000PF 50V CERAMIC X7R 0402 CK1102AK5X CAP 1000PF 50V CERAMIC X7R 0402 ST-2112D SM R 1.2 SMARTRUNK SYSTEMS, INC.
  • Page 43 CAP 1000PF 50V CERAMIC X7R 0402 CK1102AK5X C187 CAP 1000PF 50V CERAMIC X7R 0402 CK1102AK5X C188 CAP 1000PF 50V CERAMIC X7R 0402 CK1102AK5X C201 CAP 1000PF 50V CERAMIC X7R 0402 CK1102AK5X C202 CAP 1000PF 50V CERAMIC X7R 0402 ST-2112D SM R 1.2 SMARTRUNK SYSTEMS, INC.
  • Page 44 CAP CER 100PF 100V 10% NP0 0603 100pF CK4151AD4A CAP CER 150PF 100V 10% NP0 0603 150pF CK1471AK4A CAP CERAMIC 47PF 50V NP0 0402 470pF CK5103AK5X CAP CERAMIC .01UF 50V X7R 0402 10nF ST-2112D SM R 1.2 SMARTRUNK SYSTEMS, INC.
  • Page 45 CAP .10UF 16V CERAMIC Y5V 0402 100nF CK5104AK5X C151 CAP .10UF 16V CERAMIC Y5V 0402 100nF CK5104AK5X C152 CAP .10UF 16V CERAMIC Y5V 0402 100nF CK5104AK5X C153 CAP .10UF 16V CERAMIC Y5V 0402 100nF ST-2112D SM R 1.2 SMARTRUNK SYSTEMS, INC.
  • Page 46 CAP CER 10PF 50V NPO SMD 0603 10pF CK1470AD4A CAP CER 47PF 50V 1% NP0 0603 47pF CK1470AK4A CAP CER 47PF 50V 1% NP0 0402 C191 47pF CK1470AK4A CAP CER 47PF 50V 1% NP0 0402 C192 47pF ST-2112D SM R 1.2 SMARTRUNK SYSTEMS, INC.
  • Page 47 Fixed Inductors Air Core RF Inductor 13.7 nH 5 % 2.7 A 13nH YCSPG18426 Fixed Inductors Air Core RF Inductor 13.7 nH 5 % 2.7 A 13nH YCTLI1064C INDUCTOR 10UH 500-MA 0603 10uH TY2SK3476Z 2SK3476 ST-2112D SM R 1.2 SMARTRUNK SYSTEMS, INC.
  • Page 48 RES 1.0K OHM 1/16W 5% 0402 SMD RCY041024Z RES 1.0K OHM 1/16W 5% 0402 SMD RCY041024Z RES 1.0K OHM 1/16W 5% 0402 SMD RCY041024Z RES 1.0K OHM 1/16W 5% 0402 SMD RCY041024Z RES 1.0K OHM 1/16W 5% 0402 SMD ST-2112D SM R 1.2 SMARTRUNK SYSTEMS, INC.
  • Page 49 RES 22 OHM 1/16W 5% 0402 SMD RCY042204Z RES 22 OHM 1/16W 5% 0402 SMD RCY042204Z RES 22 OHM 1/16W 5% 0402 SMD RCY042204Z RES 22 OHM 1/16W 5% 0402 SMD RCY042234Z RES 22K OHM 1/16W 5% 0402 SMD ST-2112D SM R 1.2 SMARTRUNK SYSTEMS, INC.
  • Page 50 RCY044724Z R136 RES 4.7K OHM 1/16W 5% 0402 SMD RCY048234Z RES 82K OHM 1/16W 5% 0402 SMD RCY043314Z RES 330 OHM 1/16W 5% 0402 SMD RCY043314Z RES 330 OHM 1/16W 5% 0402 SMD ST-2112D SM R 1.2 SMARTRUNK SYSTEMS, INC.

  • Page 51: St-2112 Keyboard & Display Bom

    LDO LINEAR REGULATOR 3.3V 300mA HT7233 YNHT07233Z LDO LINEAR REGULATOR 3.3V 300mA HT7233 CRYSTRAL EFO160000Y TCXO 16MHZ 3.3V TCXO/+-0.5PPM 16Mhz 20 ST-2112 KEYBOARD & DISPLAY BOM ITEM SMTK PN DESCRIPTION KEY PCB EPL211030Z ST-2112D SM R 1.2 SMARTRUNK SYSTEMS, INC.
  • Page 52 CK5104AK5X CAP. 2.2UF (0402) CK6225AK6T CAP. 0.33UF (0402) CK0334AK5X CAP. 4.7UF CK0475AD7R LED (0603) EX01Y40205 FUSE 0.2A 32V (0402) EX02Y40259 IC MIMD10A-7-F YNDCOMD10A TACTILE SW EWPS33086X PCB CONNECTOR 36P EX07Y49872 PCB FHA8-M108000GA EX07Y49911 ST-2112D SM R 1.2 SMARTRUNK SYSTEMS, INC.

  • Page 53: Accessory Port

    21 ACCESSORY PORT: In the side of the radio, you will find four connectors: 1 – USB: USB 2.0 compliance 2 – External mic, External PTT and RX serial data (2.5mm) Mic (-) RX Serial (TTL) Mic (+)/PTT...
  • Page 54 I/O 3 Digital Input/Output 1K Ohm, 0-3.3V I/O 2 Digital Input/Output 1K Ohm, 0-3.3V I/O 1 Digital Input/Output 1K Ohm, 0-3.3V I/O 0 Digital Input/Output 1K Ohm, 0-3.3V Accesory power 3.3Vdc @ 200 mA ST-2112D SM R 1.2 SMARTRUNK SYSTEMS, INC.

  • Page 55: St-2112 Service Manual Revisions

    22 ST-2112 SERVICE MANUAL REVISIONS AUTHOR RELEASE DATE REMARKS DANIEL MARTIN JUN-2013 INITIAL RELEASE VERSION DANIEL MARTIN JUN-2013 ADDED SOFTWARE ZONE SPECIFICATION Copyright 2014 Printed in Malaysia www.smartrunk.com ST-2112D SM R1.2 ST-2112D SM R 1.2 SMARTRUNK SYSTEMS, INC.

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