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Kantronics TALON UDC Series Service Manual

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KANTRONICS
TALON UDC
SERIES
RADIO MODEM SERVICE MANUAL
Kantronics Co., Inc.
rd
1202 E. 23
Street, Suite A
Lawrence, Kansas 66046
Phone: 785-842-7745
Fax: 785-842-2031
Web: http://www.kantronics.com
DWG ID: 181-0101-01
Date: 2003-08-12

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  • Page 1 KANTRONICS TALON UDC SERIES RADIO MODEM SERVICE MANUAL Kantronics Co., Inc. 1202 E. 23 Street, Suite A Lawrence, Kansas 66046 Phone: 785-842-7745 Fax: 785-842-2031 Web: http://www.kantronics.com DWG ID: 181-0101-01 Date: 2003-08-12...

  • Page 2: Revisions

    1 REVISIONS Revision Date Description 2003-09-11 Preliminary Page 2 of 23 DWG ID: 181-0101-01 Date: 2003-08-12...

  • Page 3: Table Of Contents

    2 TABLE OF CONTENTS REVISIONS......................2 TABLE OF CONTENTS..................3 GENERAL INFORMATION................. 4 Sales/Inquiries......................4 Technical Support ....................4 Miscellaneous ......................4 Disclaimer Notice ....................4 MAINTENANCE INFORMATION ..............4 Repair Cautions....................... 4 4.1.1 Surface Mount Repair ..................... 5 4.1.2 Precautions For Handling CMOS Devices ............. 5 Unit Disassembly....................

  • Page 4: General Information

    A, Lawrence, KS 66046, or e-mail sales@kantronics.com. Information in this document is subject to change without notice. Contents of this publication or the firmware within the TALON UDC series may not be reproduced in any form without the written permission of the copyright owner.

  • Page 5: Surface Mount Repair

    Surface mount products require special techniques and equipment. Improper servicing can permanently damage the printed circuit board and/or components; any such RESULTING DAMAGE IS NOT COVERED by the Kantronics warranty. 4.1.2 Precautions For Handling CMOS Devices CMOS parts require special handling, because their circuits are very susceptible to damage from electrostatic or high voltage charges.

  • Page 6: Unit Disassembly

    Do not insert or remove CMOS devices with power applied. Check all power supplies used for testing, to ensure no voltage transients are present. 4.1.2.6 Soldering Use a soldering iron having a grounded tip for soldering CMOS circuitry. 4.1.2.7 Lead-Straightening Tools When straightening CMOS leads, provide ground straps on the straightening tool.

  • Page 7: If Your Unit Has An I/O, A3, Cca

    4.2.5 If your unit has an I/O, A3, CCA This will be the CCA on top. If your unit does not have an I/O CCA the Controller, A2, CCA will be on top. In either case the top CCA is held on by three #4 screws and lock washers.

  • Page 8: Alignment

    • If the Front Panel is not attached to the ANT connector, twist the connector clockwise and loop the coaxial cable so it will lie over the top of the backside of the connector, with the connector facing towards the front. •...

  • Page 9: Alignment Procedure

    equipment, and have an output which can drive the FM demodulator and frequency counter at the correct level. Audio oscillator: Must have sine wave and square wave output and adjustable output frequency and amplitude. Voltmeter for dc: 10 M input impedance. Any good DMM will have this. Oscilloscope: 20 MHz bandwidth and X10 probe.

  • Page 10: Carrier Detect

    Press the “1” key for the RX FREQUENCY TRIM and set the 1 LO on frequency using a frequency counter connected to the ANT port. (The 1 LO frequency is indicated on the VDT screen next to the RX FREQUENCY). The offset voltage at A2P1-7 will be 2.50 V dc.

  • Page 11: Transmitter Rf Power Output Adjust

    Press the “5” key for the RECEIVER GAIN ADJUST. Adjust this to get a 1 V pp signal at MX919B IC terminal 23 (A2U3-23). Go back and check the RECEIVER DC OFFSET ADJUST, because the RECEIVER GAIN ADJUST interacts with it due to a dc offset in the radio transceiver. 5.2.6 TRANSMITTER RF POWER OUTPUT ADJUST Set service monitor to measure transmitter power.

  • Page 12: Transmitter Deviation

    • Adjust the balance SMD potentiometer, A1R180. This is adjusted with a small, non- conductive, flat blade screwdriver through a clearance hole (MTH1) in the Controller, A2, CCA. Adjust such that the oscilloscope display shows a square wave with no rounded corners or overshoot.

  • Page 13: Additional Information For A1 Assemblies

    6 ADDITIONAL INFORMATION FOR A1 ASSEMBLIES The A1 assembly is made from the A1A1 circuit card assembly Ritron radio transceiver. 6.1 Internal Adjustments Note: All internal adjustments for optimum performance have been performed at Ritron’s factory. These adjustments should not be changed unless one is fairly certain alignment is necessary, or repairs have been made to appropriate sections of the CCA.
  • Page 14 VOLTAGE ITEM TERMINAL COMMENTS Q101 RX RF Preamp Q102 RX 1 IF Amp Q103-A Noise Squelch Voltage Reference E (1) 0.5 to 1.5 RX voltage varies w/signal level B (2) C (6) Q103-B Noise Squelch Amp E (4) 0.5 to 1.5 RX voltage varies w/signal level B (5) 0 to 1.5...
  • Page 15 VOLTAGE ITEM TERMINAL COMMENTS Q108 Q109 VCO RX/TX SW XSTR Q110 VCO RX/TX SW XSTR Q111 VCO Active PS Filter Q112 Reference OSC Tripler Q113 TX SW XSTR Q114 TX SW XSTR Q115 TX Enable SW XSTR Q116 PLL Lock Detect Drive XSTR 0 V when unlocked 4.9 V when unlocked Page 15 of 23...
  • Page 16 VOLTAGE ITEM TERMINAL COMMENTS Q117 PLL Charge Pump VR IC101 RX 1 Freq Converter IC102 RX 2 Freq Converter, IF, Detector — — No connect 0 to 3 RX voltage varies w/signal level IC103 RX Detector Buffer Amp Page 16 of 23 DWG ID: 181-0101-01 Date: 2003-08-12...
  • Page 17 VOLTAGE ITEM TERMINAL COMMENTS IC104 RF PA Module 2.5 to 3.5 0 to 4 TX voltage varies w/RF power — — Don’t measure! IC105 RX/TX Logic IC106 5 V Regulator — — No connect IC107 RX 5 V Regulator — —...

  • Page 18: Active Component Voltage Chart For Dtx-154 Rf Cca

    VOLTAGE ITEM TERMINAL COMMENTS IC108 PLL Synthesizer IC 1 to 5 1 to 5 Tuning V, depends on freq — — No connect Lock detect, 0 when unlocked Data, pulses high while being loaded Data, pulses high while being loaded Data, pulses high while being loaded —...
  • Page 19 VOLTAGE ITEM TERMINAL COMMENTS Q103-A Noise Squelch Voltage Reference E (1) 0.5 to 1.5 RX voltage varies w/signal level B (2) C (6) Q103-B Noise Squelch Amp E (4) 0.5 to 1.5 RX voltage varies w/signal level B (5) 0 to 1.5 RX voltage varies w/signal level C (3) 0 to 1.5...
  • Page 20 VOLTAGE ITEM TERMINAL COMMENTS Q111 Reference OSC Tripler Q112 TX SW XSTR Q113 TX SW XSTR Q114 TX Enable SW XSTR Q115 PLL RF Buffer XSTR Q116 PLL Charge Pump VR Q117 PLL Lock Detect Driver XSTR 0 V when unlocked 4.9 V when unlocked Page 20 of 23 DWG ID: 181-0101-01...
  • Page 21 VOLTAGE ITEM TERMINAL COMMENTS IC101 RX 1 Freq Converter IC102 RX 2 Freq Converter, IF, Detector — — No connect 0 to 3 RX voltage varies w/signal level IC103 RX Detector Buffer Amp IC104 RF PA Module 2.5 to 3.5 0 to 4 TX voltage varies w/RF power —...
  • Page 22 VOLTAGE ITEM TERMINAL COMMENTS IC106 RX/TX Logic IC107 5 V Regulator — — No connect IC108 RX 5 V Regulator — — No connect Page 22 of 23 DWG ID: 181-0101-01 Date: 2003-08-12...

  • Page 23: Block Diagram, Product Structure, Parts Lists, Schematic Diagrams, And Parts Layouts

    Controller CCA A2A1 GPS RCVR CCA Each assembly/subassembly has: • A parts list (PL), whose drawing number is the Kantronics’ part number for that item • A schematic diagram • A parts layout (if it exists) Page 23 of 23...

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