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Chapter 3 DC Power Distribution

3.1

DC Regulation and Distribution

A block diagram of the DC power distribution throughout the radio is shown in Figure 3-1.

Figure 3-1. DC Power Distribution Block Diagram

Battery voltage enters at connector J602 and is routed through SW/VOL1 to become SWB+.

This voltage is routed to:

• SW/VOL1
• TX power amplifier Q403 (via R417)
• APC circuit U401
• RX audio power amplifier U601
• 5V regulator (U505)
• 3.3V regulator (U506)
• Voltage divider R153/R154, a microprocessor A/D input which measures battery voltage
• Key PCB

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Содержание CP Series

Страница 1: ...Portable Radios Detailed Service Manual EP350 ...

Страница 2: ......

Страница 3: ...Manual No 6878422A01 Kindly complete the Service Manual Feedback Form on the next page to help us ensure that you receive the most accurate and complete information Fax to 6 04 6124944 The Technical Publications Coordinator Global Customer Documentation R D Department Motorola Penang Your Details Name ContactPerson Company Name Address Telephone No Fax No Email Address How would you like to receiv...

Страница 4: ...equipment very much so generally yes to some extent no 4 We would appreciate any corrections or recommendations for improving this manual Please include the specific page number s of the diagram or procedure in question 5 General comments suggestions Manual No 6878422A01 Fax to 6 04 6124944 The Technical Publications Coordinator Global Customer Documentation R D Department Motorola Penang Complete...

Страница 5: ...ight to copy or reproduce in any form the copyrighted computer program Accordingly any copyrighted Motorola computer programs contained in the Motorola products described in this manual may not be copied reproduced modified reverse engineered or distributed in any manner without the express written permission of Motorola Furthermore the purchase of Motorola products shall not be deemed to grant ei...

Страница 6: ...ergy exposure limits For a list of Motorola approved antennas and other accessories visit the following web site which lists approved accessories http www motorola com radiosolutions These servicing instructions are for use by qualified personnel only To reduce the risk of electric shock do not perform any servicing other than that contained in the Operating Instructions unless you are qualified t...

Страница 7: ...owing major changes have been implemented in this manual since the previous edition Edition Description Date 6878422A01 A Initial edition Mar 2009 6878422A01 B Added VHF and UHF1 band information Chapter 8 9 10 11 12 13 August 2009 ...

Страница 8: ...iv Notes ...

Страница 9: ...RX Audio Processing 4 1 4 1 1 2 RX Tone PL Digital PL Decode Filtering 4 2 4 1 2 Audio Amp 4 2 4 1 3 Internal and External Speaker 4 2 4 2 TX Audio Circuit 4 3 4 2 1 MIC and External MIC 4 3 4 2 2 4 order 4 kHz Low Pass Filter U501 C D 4 3 4 2 3 Audio processor IC U102 4 3 4 2 3 1 TX Audio Processing 4 3 4 2 3 2 Tx Tone PL Digital PL Encode Filtering 4 4 4 2 4 TX audio amplifier and 6 order 3 kHz ...

Страница 10: ...esizer UHF2 6 2 6 3 Troubleshooting Table for Transmitter UHF2 6 3 6 4 Troubleshooting Table for Board and IC Signals UHF2 6 4 Chapter 7 UHF2 Schematic Diagrams Overlays and Parts Lists 7 1 7 1 Introduction 7 1 7 1 1 Notes For All Schematics and Circuit Boards 7 1 7 1 2 Four Layer Circuit Board 7 3 7 2 Speaker and Microphone Schematic 7 3 7 2 1 Speaker and Microphone Parts List 7 3 7 3 Circuit Boa...

Страница 11: ...1 Parts List 10 14 Chapter 11 403 447 MHz UHF1 Theory Of Operation 11 1 11 1 Introduction 11 1 11 2 UHF1 Receiver 11 1 11 2 1 Receiver Front End 11 2 11 2 2 Receiver Back End 11 2 11 3 UHF1 Transmitter 11 3 11 3 1 Power Amplifier 11 3 11 3 2 Antenna Switch 11 3 11 3 3 Harmonic Filter 11 3 11 3 4 Auto Power Control 11 4 11 4 UHF1 Frequency Generation Circuitry 11 4 11 4 1 Reference Oscillator 12 8 ...

Страница 12: ...13 3 13 2 1 Speaker and Microphone Parts List 13 3 13 3 Circuit Board Schematic Diagram and Parts List UHF1 403 447 MHz 13 1 13 3 1 Parts List 13 13 Appendix A Warranty Service Support and Replacement Parts A 1 A 1 Scope of Manual A 1 A 2 Warranty A 1 A 2 1 Warranty Period and Return Instructions A 1 A 2 2 After Warranty Period A 1 A 2 3 Piece Parts A 2 ...

Страница 13: ...00 7 15 Figure 8 1 VHF Receiver Block Diagram 8 1 Figure 8 2 VHF Transmitter Block Diagram 8 3 Figure 8 3 VHF Frequency Generation Unit Block Diagram 8 4 Figure 8 4 Keypad Block Diagram 8 6 Figure 10 1 Four Layer Circuit Board Copper Steps in Layer Sequence 10 3 Figure 10 2 Speaker and Microphone Schematic 10 3 Figure 10 3 VHF 136 174 MHz Receiver Schematic Diagram 10 1 Figure 10 4 VCO and PLL Sch...

Страница 14: ...ematic Diagram 13 6 Figure 13 9 Transmitter Audio Filter and Sub tone Schematic Diagram 13 7 Figure 13 10 UHF1 403 447 MHz Mainboard Top Side PCB No 8431BEAUHF300 13 8 Figure 13 11 UHF1 403 447 MHz Mainboard Bottom Side PCB No 8431BEAUHF300 13 9 Figure 13 12 UHF1 403 447 MHz Sub Circuit Board Top View PCB No 8421BEACON100 13 10 Figure 13 13 UHF1 403 447 MHz Sub Circuit Board Bottom View PCB No 842...

Страница 15: ...Table 6 3 Troubleshooting Table for Transmitter UHF2 6 3 Table 6 4 Troubleshooting Table for Board and IC Signals UHF2 6 4 Table 9 1 Troubleshooting Table for Receiver VHF 9 1 Table 9 2 Troubleshooting Table for Synthesizer VHF 9 2 Table 9 3 Troubleshooting Table for Transmitter VHF 9 3 Table 9 4 Troubleshooting Table for Board and IC Signals VHF 9 4 Table 12 1 Troubleshooting Table for Receiver U...

Страница 16: ...e use of the following notations These notations are used to emphasize that safety hazards exist and due care must be taken and observed Note An operational procedure practice or condition that isessential to emphasize CAUTION indicates a potentially hazardous situation which if not avoided might result in equipment damage ...

Страница 17: ...s manual Frequency Band Bandwidth Power Level PC Board Part Number Board Revision Chapter UHF2 435 480 MHz 1W or 4W 8431BEACON200 2 7 UHF2 8421BEACON100 1 7 UHF2 8422BEACON100 1 7 VHF 136 162 MHz 1W or 5W 8431BEACON400 4 10 VHF 8421BEACON100 1 10 VHF 8422BEACON100 1 10 UHF1 403 447 MHz 1W or 4W 8431BEAUHF300 3 13 UHF1 8421BEACON100 1 13 UHF1 8422BEACON100 1 13 ...

Страница 18: ...xiv Notes ...

Страница 19: ...0 5 solution of a mild dishwashing detergent in water The only factory recommended liquid for cleaning the printed circuit boards and their components is isopropyl alcohol 100 by volume 1 Cleaning External Plastic Surfaces The detergent water solution should be applied sparingly with a stiff non metallic short bristled brush to work all loose dirt away from the radio A soft absorbent lintless clot...

Страница 20: ...ecautions are mandatory for CMOS circuits and are especially important in low humidity conditions DO NOT attempt to disassemble the radio without first referring to the CMOS CAUTION paragraph in the Disassembly and Reassembly section of the manual 1 5 General Repair Procedures and Techniques NOTE Always use a fresh supply of alcohol and a clean container to prevent contamination by dissolved mater...

Страница 21: ... Be careful not to form solder bridges between the connector pins Closely examine your work for shorts due to solder bridges Chip Components Use the RLN4062 Hot Air Repair Station for chip component replacement Adjust the temperature control to 390 C 735 F and adjust the airflow to a minimum setting Airflow can vary due to component density To remove a chip component 1 Use a hot air hand piece and...

Страница 22: ...replacing shields is recommended to be done with the Air Blower BOSCH GHG 603 or equivalent To remove the shield 1 Place the circuit board in the circuit board holder 2 Add solder paste flux around the base of the shield 3 Position the heat focus head onto the shield 4 Turn on the heater and wait until the shield lifts off the circuit board 5 Once the shield is off turn off the heat and grab the p...

Страница 23: ...er 32 segment bar graph with backlit display Digital voltmeter is recommended for AC DC voltage and current measurements Fluke 85 RF probe 500 MHz 30 VAC max Use with Fluke 87 digital multi meter for RF voltage measurements R1377A AC voltmeter 1 mV to 300 mV 10 mega Ohm input impedance Audio voltage measurements R1611A Dual channel 100 MHz oscilloscope Agillent Two channel 100 MHz bandwidth 200 M ...

Страница 24: ...ye nut PMDN4040_R1 Radio Test Box Enables communication between the radio test equipment and the computer s USB port PMDN4041_R RF Adapter Adapts radio s antenna port to BNC cabling of test equipment PMDN4044_R T Head Ceramic Tuning Tool Used for tuning the VCO PMDN4053_R Flat Ceramic Tuning Tools 0 9mm Used for tuning the VCO PMDN4076_R Radio to Radio Cloning Cable Allows a radio to be duplicated...

Страница 25: ...gure 2 1 Programming Test Cable PMDN4077_R Figure 2 2 Cloning Cable PMDN4076_R Figure 2 3 Wiring of the Connectors 2 5mm stereo USB connection t 2 5mm stereo 2 5mm stereo 2 5mm stereo 1 2 TX_D RX_D 4 5 6 GND VBUS D D D D VBUS 1 2 3 USB_CONNECTOR 2 1 GND IC CP2102 To Computor RX TX data GND ...

Страница 26: ...Notes 2 4 Test Equipment Service Aids and Service Tools Service Aids ...

Страница 27: ...oltage is routed to SW VOL1 TX power amplifier Q403 via R417 APC circuit U401 RX audio power amplifier U601 5V regulator U505 3 3V regulator U506 Voltage divider R153 R154 a microprocessor A D input which measures battery voltage Key PCB Audio filter LCD Driver DTMF IC Digital potentiometer PLL IC MCU EEPROM TXVB RX B VCO Vcc VCTCXO Voltage Doubler Vdd Regulator Charge Pump 5V 10V Low Batt detecto...

Страница 28: ...to mixer IF IC and LNA Q407 is turned on by Q408 when TX_EN2 from U101 Pin 85 is high and supplies the TXVB source to the first transmitter stage Q401 base Q402 gate APC power source U401 Pin 8 and ANT switch CR401 The 3 3 V regulated source from U506 is applied to MCU IC U101 EEProm IC U104 DTMF IC U103 Audio processor IC U102 Microphone bias circuitry And applied to Key PCB LCD driver power sour...

Страница 29: ... pass filter to eliminate high frequency components higher than 3 kHz which are included in the receive demodulation signal TX RX HPF High pass filter to eliminate low frequency components lower than 250 Hz which are included in receive audio signal This circuit is turned on and off by control register of Audio processor IC Descrambler This circuit inverts the spectrum distribution of receive audi...

Страница 30: ...Pin 18 output pass through switchable high pass filter U105 This filter U105 A B has 4 different high pass cut off frequencies which can be selected accordingly to the sub tone audio This filter U105 A B filters the unwanted sub tone The tone of U105 B output passed through U105 C comparator which acts as a squaring circuit This output signal is then sent to microprocessor Pin 3 The micro processo...

Страница 31: ...ammable LPF pin4 pin17 pin8 U102 6 to 6dB 0 5dB Fc 300Hz VR2 Pre Emphasis Com pressor DTA1 pin19 To VCO VCTCXO 2 Order LPF Fc 300Hz U502 A Mod Adj 6 Order LPF Fc 3KHz U501 A B U508 TX AF Amp U502 C 4 Order LPF Fc 4KHz U501 C D Mic Audio IN Fc 2 55KHz 3KHz VR1 HPF Limiter Scrambler Descrambler Splatter SMF TX RX HPF TXA1 6 to 4 5dB 1 5dB 9 6 to 3dB 0 2dB Audio Processor IC AK2347 Tone IN from CPU V...

Страница 32: ...ircuit is turned on and off by control register of Audio Processor IC Scrambler This circuit inverts the spectrum distribution of transmitter audio signals with respect to the carrier frequency The carrier frequency is 3 388 kHz or 3 290 kHz Limiter Amplitude limiting circuit to suppress frequency deviation in the modulation signal The limit level can be adjusted by applying a DC voltage the LIMLV...

Страница 33: ... 2 Control and Indicator Interface Ports Pin 35 and 36 are outputs which control the Sub PCB mounted LED indicator When Pin 35 is high the indicator is green When Pin 36 is high the indicator is red When both are high the indicator is amber When both are low the indicator id is off Pressing the side mounted PTT button PB501 provides a low to port Pin 44 which indicates PTT is asserted Side mounted...

Страница 34: ... voltage Once the digital supply reaches steady state and releases the reset line U107 Pin 2 the microprocessor begins to start up After reset release by all circuit the software within the microprocessor begins executing port assignment RAM checking and initialization 4 3 7 Microprocessor 7 3728 MHz Clock The 7 3728 MHz clock signal Pin 13 X in is provided from the FL101 4 3 8 Battery indicator V...

Страница 35: ...frequency range of 435 480 MHz and it is a double conversion super heterodyne with 1st IF 45 1 MHz and 2nd IF 455 kHz The receiver is divided into two major blocks Front End and Back End as shown in Figure 5 1 Figure 5 1 UHF2 Receiver Block Diagram Crystal Filter Crystal 44 645MHz 1st Mixer RF Amp Preselector Filter Postselector Filter RX from Antenna Switch Inj Filter First LO from Synthesizer IF...

Страница 36: ...nd controlled by CPU 435 480 MHz The output of the post selector is connected to the single balanced mixer consisting of components L329 L333 Q306 and Q307 1st local signal generated from VCO is filtered by injection filter L310 L331 C325 C326 C327 to remove second harmonics The converted 1st IF frequency at mixer passes through L331 and matches the 45 1 MHz IF signal to pair crystal filter FL301 ...

Страница 37: ... amp The final amp Q403 is an enhancement mode N channel MOSFET device providing a gain of 12dB The device drain current is drawn directly from the DC battery supply voltage input via L413 A matching network consisting of C416 to C420 and a strip line transforms the impedance to approximately 50 Ohm 5 3 2 Antenna Switch An antenna switch works mainly as a switching device between transmit and rece...

Страница 38: ...d By tuning the RF output power the bias voltage will be tuned through U402 Extra care has to be taken during the tuning process Do not exceed the maximum allowed bias voltage 5 4 UHF2 Frequency Generation Circuitry The PLL synthesizer subsystem consists of the reference oscillator VCTCXO VCO PLL IC Charge Pump and Loop Filter Figure 5 3 UHF2 Frequency Generation Unit Block Diagram 5 4 1 Reference...

Страница 39: ...noise to get the best signal to noise ratio The output signal from loop filter is applied to VCO 5 4 5 Dual VCO The dual VCO module contains a RX VCO and a TX VCO They are configured as colpitts oscillators and connected to power up through transistor switches Only one VCO is selected at a time A steering line voltage between 0 35V and 9 7V at varactor CR701 tunes the full RX frequency range from ...

Страница 40: ...ow and microprocessor detects it For full keypad models the number keys are in matrix type which consisted of 3 rows and 4 columns When any of these keys is pressed the voltage goes low and microprocessor interprets the voltage for each key press Figure 5 4 Keypad Block Diagram KEYPAD Left NUMBERS Right P1 P2 P3 Key Key row Key column 22pin connector Keypad board 22pin connector Main board MCP det...

Страница 41: ...rts on outputs Troubleshoot Repair as needed replace faulty regulator 5 Flexible Cable fault Check connection of the 12 pin flexible cable between J104 J105 Re assemble or replace flexible cable No RX Audio with LED indication 1 Speaker dead or defective Substitute a good housing with speaker Verify J603 connection Change the housing with accessory Change the housing with accessory 2 Audio Process...

Страница 42: ...04 Q305 circuitry 4 Check PLL LD port Verify U101 Pin 27 is Low Normal Mode Verify U101 Pin 27 is swept from low to high Power Save Mode Troubleshoot PLL circuitry Repair Replace U701 Synthesizer Out of Lock No TX Mode 1 Defective 12 8 MHz VCTCXO Verify clock output FL701 Pin 3 is 12 8 MHz using high impedance probe Repair Replace FL701 2 1 2VCC defective Verify FL701 Pin 1 U502 B Pin 5 U502 D Pin...

Страница 43: ...ndication OK 1 Synthesizer out of lock Refer to Table 6 2 Check U101 operating 2 No TX Enable Verify U101 Pin 84 TX EN1 is high when PTT is pressed Verify Q407 collector voltage is approximately 4 7V when PTT is pressed TX EN2 Check U101 Pin 85 is high Replace Q407 Check LK2 is short Low Power 1 Low TX injection Check the RF level at Q409 C449 per schematic Troubleshoot Q409 circuitry VCO bias 2 R...

Страница 44: ...45 MHz input 2 Osc2 3 3 4 VCC 4 7 9 Audio frequency 1 2 12 RSSI out Approximately 1 At 47dBm with conducted 13 N DET BUSY Low At busy 15 GND 0 16 RF input 1 45 1 MHz input U701 PLL IC 1 Reference OSC input 1 4 12 8 MHz input 4 VCC 3 3 6 GND 0 7 XF IN 2 2 8 F IN 2 2 12 Power save High 13 GND 0 14 LD_out High If pll unlock is low 15 P 2 4 16 R Low U601 1 Mode Mute con 0 Audio Amp 2 SVR 3 8 3 IN 3 8 ...

Страница 45: ...MHz 4 VCC 5 Q206 N S SW E GND 0 B N S SW 12 5 kHz Low C Collector 12 5 kHz High 25 kHz Low Q304 E 5V 5 At RX Mode B To Q305 collector Low C RX_B 4 7 Q305 E GND 0 At RX Mode B RX_EN High C To Q304 base Low Q503 E GND 0 At TX Mode B TX_EN1 High C To Q706 base Low Q407 E 5V 5 At TX Mode B To Q408 collector Low C TXVB 4 7 Q408 E GND 0 At TX Mode B TX_EN2 High C To Q407 Low Table 6 4 Troubleshooting Ta...

Страница 46: ...xpressed in volts DC relative to ground 0V 2 Voltages are measured with a DC input voltage of 7 50 02 volts DC applied to the battery connector J602 3 All voltages are measured in the squelched receive mode unless otherwise indicated 4 Voltages are identical for VHF and UHF models unless otherwise indicated Table 6 4 Troubleshooting Table for Board and IC Signals UHF2 Continued IC Designator Pin P...

Страница 47: ... RF are DC level readings which correspond approximately 1 1 to the RF voltage level in mV rms RF voltages in the Receiver Front End and Receiver Back End circuits are measured with an on channel 1mV 47dBm RF signal applied to the antenna jack ANT1 ANT 4 RF voltages on UHF models are measured both with a high impedance RF voltmeter having a bandwidth in excess of 500 MHz levels are expressed in dB...

Страница 48: ...WB Switched Battery Voltage BAT Unswitched Battery voltage 10V Digital 10V Regulated RESET Low line reset signal fromU107 to U101 Pin 10 TX_EN1 Transmit enable signal from U101 Pin 84 TX_EN2 Transmit enable signal from U101 Pin 85 TXVB TX operating voltage TX_AF3 TX audio signal from audio processor IC to TX Audio filter TX_SUB_TONE TX sub tone signal from audio processor IC to TX modulation RX_B ...

Страница 49: ...d Microphone Schematic Figure 7 2 Speaker and Microphone Schematic 7 2 1 Speaker and Microphone Parts List Reference Designator Motorola Part No Description MIC1 PMDN4139_R Microphone SPK1 PMDN4067BR Speaker Cable Plating Au PSR ink Copper Plate Copper Copper Copper Copper Copper Plate PSR ink PrePreg CCL core PrePreg MIC1 SPK1 1 2 1 2 MATES WITH J103 ON RADIO BOARD MATES WITH J603 ON RADIO BOARD ...

Страница 50: ...F C373 20pF C379 20pF C354 10pF R332 100K FTV R333 100K C375 NA C355 15pF CR305 KDV154E C358 15pF L322 22nH L323 18nH CR304 KDV154E C304 OR C374 10pF C318 15pF L328 18nH EJPS EJPS EJPS C363 NA R334 100K R309 100R R310 4 7K R335 2 2K R336 1K R337 100R RX_B RX_EN 5V C B E C319 10nF C320 10uF 16V A C380 47pF C378 10uF 16V A C334 1nF C338 47nF CR306 KDS160E C339 0 1uF K R314 100R R317 180K R318 3 3K D...

Страница 51: ... 10K R503 56K R733 0R R734 10R R732 10K 8 7 6 5 4 3 2 1 9 10 11 12 13 14 15 16 FIN CLK DATA LE PS ZC LD_FOUT P R OSCIN OSCOUT VP VCC DO GND XFIN U701 MB15E03L PLL_PS PLL_CLK PLL_LD PLL_DATA PLL_STB C738 7pF C739 1nF C756 1nF C747 10pF C746 10pF L709 22nH C740 0 1uF C741 0 1uF R731 10R 3 3V 5V 7 6 3 2 1 FL701 12 8MHZ VCC VCXO VCON GND OUT 4 5 C749 1uF 1608 C753 47nF 3216 C754 47nF 3216 Q708 KTA2014...

Страница 52: ...602 2 1 3 U401 A KIA358 GND R420 4 7M R423 3 9M R425 3 9K R424 12K R430 100R L406 220nH 1608 C436 0 1uF C469 0 1uF 3 3V C470 47pF C473 47pF 7 8 1 U402 U D VDD NC VSS B CS W A 2 3 4 6 5 R426 4 7K R431 10K R433 0R TX_PWR_CS TX_PWR_U D TX_PWR_LOW MCP4011 502 Q406 KRC404 C439 1nF Q408 KRC404 C472 470pF C471 0 1uF Q407 KRA305 C438 NA C437 0 1uF TXVB TX_EN2 FROM_VCO TX_VCO_B LK2 5V 7 47nF C435 R427 220K...

Страница 53: ...7K 47K 47K 47K 47pF 47pF 47pF 47pF 47pF 47pF C169 FUN_KEY1 POP_CON TONE_INT2 MOD_CON_CS MOD_CON_U D LCD_DATA KIA7027AT 3 3V R164 100K R169 1 2K R175 51K R174 100K FTV C1017 470pF R171 10K R172 10K R173 10K MIC1 BUSY Q4 3 3V U102_SDATA U102_SCLK U102_CSN 8 VCC OC A1 A2 SCL SDA VSS 7 6 5 4 3 2 A0 1 C147 0 1uF K U104 24LC64 R139 10K Q3 Q2 Q1 STD U106_SW PTT2 20KHZ_SEL PLL_PS TX_PWR_U D BEEP_CON DTMF_...

Страница 54: ...100 1uF 1608 R1002 9 1K C1026 47pF R613 15K 1608 R609 1K R622 0R R621 39K C605 4 7uF 2012 R608 NA R620 33K C606 0 1uF C601 0 1uF SWB R610 2R2 C616 0 1uF K R615 2R2 J603 53047 0210 C617 0 1uF K R616 0R C621 330pF C609 0 1uF K C622 47pF L601 2 2uH 1608 SPK1 SM3624X1 J601 0980683Z01 L602 2 2uH 1608 POP_CON Q602 KRC404 Q601 KRC404 1 2 3 4 5 6 7 1 2 3 4 5 6 7 8 9 10 11 12 1 2 3 4 5 6 7 8 9 10 11 12 J10...

Страница 55: ...PIN7 5V R734 U501_pin4 Q705 706 Q304 Q407 R171 173 U105_pin4 U502_pin4 5V 5V 5V 5V 5V 5V 5V 3 3V 3 3V 3 3V 3 3V 3 3V 3 3V 3 3V 3 3V 3 3V 3 3V 3 3V 3 3V 3 3V 3 3V U107_pin1 U106_pin4 R131 R150 U103_pin11 20 U104_pin8 J102_pin16 U101_pin14 96 97 U104_pin1 Q711 R719 722 R507 R537 U508_pin1 C507 22uF 16V B C503 0 1uF U505 TK11250AMTL 1 2VCC C545 22uF 10V A R523 30K 1 C533 0 1uF C531 0 1uF R524 47K 1 N...

Страница 56: ...182 200K R183 NA U101_PIN66 U101_PIN65 U101_PIN64 U101_PIN63 12 12 CSN SDATA VSS MOD LIMLV EXTINO EXTIN TXIN TXINO AGND AGNDIN SCLK TEST XIN XOUT VDD TSAOUT RSAOUT DIN DIN0 RXOUT FILO RXINO RXIN 13 13 14 14 15 15 16 16 17 17 18 18 19 19 20 20 21 22 23 24 C154 1uF K C1039 47pF C105 15nF C107 0 1uF K C120 15pF U101_PIN79 RX_AF2 C118 10uF 16V R143 100K R144 100K C117 1 2nF C115 27pF C116 27pF C3 47pF...

Страница 57: ...10 R145 R146 C105 C104 C1022 C1023 TP4 TP10 U101 FL101 TP8 TP9 TP2 TP6 TP5 TP7 J102 TP3 C1027 C1026 C1025 C116 C1016 C214 U202 PB502 Q202 PB503 C473 C617 C621 C601 C625 C624 R608 R609 R623 R619 R433 U402 Q601 Q602 PB501 R616 L601 L604 L603 J601 R417 R421 R419 R420 C433 C471 C472 C435 C438 C411 C463 C462 C465 L709 C747 R730 R721 R722 R723 R724 R725 R740 R726 R716 R718 R717 C749 C738 R733 C748 C752 ...

Страница 58: ...4 C347 R315 L327 C342 R319 R312 R258 CR312 CR315 C203 C201 C207 C113 C100 C118 C509 C508 C507 C194 C502 C501 R139 R539 R512 C521 C161 C178 C179 C177 C523 R509 R508 C517 C544 C524 C516 C525 C548 C529 C550 C519 R107 C575 C547 C542 R517 R518 R538 R536 C527 U508 C543 C522 R514 R515 U501 C168 C167 C166 C165 C171 C164 C189 C188 C170 C173 C169 C172 R193 C1034 C1036 C1035 C162 C163 C142 C140 C141 R194 C54...

Страница 59: ...rcuit Board Schematic Diagram and Parts List UHF2 435 480 MHz 7 13 Figure 7 12 UHF2 435 480 MHz Sub Circuit Board Top View PCB No 8421BEACON100 R501 R502 CR501 C563 C564 C562 C565 C566 C560 C561 Q501 Q502 ...

Страница 60: ...7 14 Circuit Board Schematic Diagram and Parts List UHF2 435 480 MHz Figure 7 13 UHF2 435 480 MHz Sub Circuit Board Bottom View PCB No 8421BEACON100 SW1 J104 SW VOL1 ...

Страница 61: ...MHz Keypad Board PCB No 8422BEACON100 MIC1 CR110 CR111 CR114 CR115 CR112 CR113 C1018 J101 SH201 C176 C175 C174 C187 R155 R199 R147 C1005 C1004 R196 R197 R198 R161 R160 R159 C1002 C1003 C1006 C1007 R108 R158 R156 C1008 C1001 R109 R112 C1012 C1013 C1014 R119 R157 C1015 J103 C1009 C1010 C1011 Q110 ...

Страница 62: ...C146 TDK Chip Cap 1005 J 15PF C147 TDK Chip Cap 1005 K 0 1μF C153 TDK Chip Cap 1005 K 1μF C154 TDK Chip Cap 1005 K 1μF C156 TDK Chip Cap 1005 K 0 22μF C157 TDK Chip Cap 1005 K 0 22μF C158 TDK Chip Cap 1005 K 0 22μF C161 TDK Chip Cap 1005 J 220PF C162 TDK Chip Cap 1005 J 220PF C163 TDK Chip Cap 1005 J 220PF C164 TDK Chip Cap 1005 J 220PF C165 TDK Chip Cap 1005 J 220PF C166 TDK Chip Cap 1005 J 220PF...

Страница 63: ... Chip Cap 1005 J 47PF C382 TDK Chip Cap 1005 Z 0 1μF C401 TDK Chip Cap 1005 C 3PF C402 TDK Chip Cap 1005 K 10nF C403 TDK Chip Cap 1005 K 470PF C404 TDK Chip Cap 1005 J 56PF C405 TDK Chip Cap 1005 J 56PF C406 TDK Chip Cap 1005 Z 0 1μF C408 TDK Chip Cap 1005 K 10nF C410 TDK Chip Cap 1608 J 27PF C413 TDK Chip Cap 1608 J 27PF C416 TDK Chip Cap 1608 D 7PF C417 TDK Chip Cap 1608 J 12PF C418 TDK Chip Cap...

Страница 64: ...M 10V A C546 TDK Chip Cap 1005 K 0 1μF C547 TDK Chip Cap 1005 K 2200PF C549 TDK Chip Cap 1005 K 560PF C550 TDK Chip Cap 1005 K 560PF C551 HITACH Chip Tantal 10uF M 10V A C560 TDK Chip Cap 1005 J 47PF C561 TDK Chip Cap 1005 J 47PF C562 TDK Chip Cap 1005 J 47PF C563 TDK Chip Cap 1005 J 47PF C564 TDK Chip Cap 1005 J 47PF C565 TDK Chip Cap 1005 J 47PF C566 TDK Chip Cap 1005 J 47PF C570 TDK Chip Cap 10...

Страница 65: ... TDK Chip Cap 1005 J 47PF C1002 TDK Chip Cap 1005 J 47PF C1003 TDK Chip Cap 1005 J 47PF C1004 TDK Chip Cap 1005 J 47PF C1005 TDK Chip Cap 1005 J 47PF C1006 TDK Chip Cap 1005 J 47PF C1007 TDK Chip Cap 1005 J 47PF C1008 TDK Chip Cap 1005 J 47PF C1009 TDK Chip Cap 1005 J 47PF C1010 TDK Chip Cap 1005 J 47PF C1011 TDK Chip Cap 1005 J 47PF C1012 TDK Chip Cap 1005 J 47PF C1013 TDK Chip Cap 1005 J 47PF C1...

Страница 66: ...12 8 MHZ F CABLE 1 BGTech 8560228005000 SNAGGWA BEACON FLAT CABLE FF12 22N080XXA F CABLE 2 BGTech 8560124005000 SNAGGWA BEACON FLAT CABLE FF12 12N040XXA J101 BGTech 851607C01S110 YUNHO FPC CONNECTOR 05004HR 07C01S G J102 BGTech 851622A01S110 YUNHO FPC CONNECTOR 05004HR 22A01S J103 BGTech 8516220005020 KYOCERA FPC CONNECTOR 04 6292 022 000 800 J104 BGTech 851612151A110 OMIRON FPC CONNECTOR XF2M 121...

Страница 67: ...BJT NPN Transistor Q111 KEC KTA 2014 BJT PNP Transistor Q112 KEC KTA 2014 BJT PNP Transistor Q113 KEC KRC 404 BJT NPN Transistor Q114 KEC KRC 404 BJT NPN Transistor Q120 KEC KRC 404 BJT NPN Transistor Q121 KEC KRC 404 BJT NPN Transistor Q122 KEC KRC 404 BJT NPN Transistor Q201 KEC KRC 404 BJT NPN Transistor Q206 KEC KRC 404 BJT NPN Transistor Q207 KEC KRC 404 BJT NPN Transistor Q301 KEC 2SC4226 BJ...

Страница 68: ... 1005 K 0 1μF R136 KAMAYA Chip Res 1005 J 100KΩ R137 KAMAYA Chip Res 1005 J 4 7MΩ R138 KAMAYA Chip Res 1005 J 220KΩ R139 KAMAYA Chip Res 1005 J 10KΩ R140 KAMAYA Chip Res 1005 J 68KΩ R141 KAMAYA Chip Res 1005 J 100KΩ R142 KAMAYA Chip Res 1005 J 330KΩ R143 KAMAYA Chip Res 1005 J 100KΩ R144 KAMAYA Chip Res 1005 J 100KΩ R145 KAMAYA Chip Res 1005 J 1MΩ R146 KAMAYA Chip Res 1005 J 0Ω R147 KAMAYA Chip Re...

Страница 69: ...es 1005 J 100Ω R338 KAMAYA Chip Res 1005 J 100Ω R401 KAMAYA Chip Res 1005 J 180Ω R402 KAMAYA Chip Res 1005 J 39Ω R403 KAMAYA Chip Res 1005 J 180Ω R404 KAMAYA Chip Res 1005 J 8 2KΩ R405 KAMAYA Chip Res 1005 J 1 5KΩ R406 KAMAYA Chip Res 1005 J 22Ω R407 KAMAYA Chip Res 1005 J 4 7KΩ R408 KAMAYA Chip Res 1005 J 2 2KΩ R409 KAMAYA Chip Res 1005 J 10Ω R410 KAMAYA Chip Res 1005 J 10Ω R411 KAMAYA Chip Res 1...

Страница 70: ...KAMAYA Chip Res 1005 J 1 5KΩ R703 KAMAYA Chip Res 1005 F 4 7KΩ R704 KAMAYA Chip Res 1005 F 4 7KΩ R705 KAMAYA Chip Res 1005 J 220Ω R706 KAMAYA Chip Res 1005 J 100Ω R707 KAMAYA Chip Res 1005 J 1 5KΩ R708 KAMAYA Chip Res 1005 F 4 7KΩ R709 KAMAYA Chip Res 1005 F 6 8KΩ R710 KAMAYA Chip Res 1005 J 220Ω R711 KAMAYA Chip Res 1005 J 100KΩ R712 KAMAYA Chip Res 1005 J 100KΩ R713 KAMAYA Chip Res 1005 J 30KΩ R...

Страница 71: ...311360020 TOSHIBA FM IC TA31136 U202 BGTech 8191401150220 MIRCOCHIP DIGITAL POTENTIOMETER MCP4011 502 U401 KEC OP AMP DUAL KIA358 U402 BGTech 8191401150220 MIRCOCHIP DIGITAL POTENTIOMETER MCP4011 502 U501 JRC JRC OP AMP NJM324 U502 JRC JRC OP AMP NJM324 U505 BGTech 8123011250021 TOKO REGULATOR IC TK11250AMTL U506 BGTech 8123112330020 TOKO REGULATOR IC TK11233AMTL U507 BGTech 8128TC1240020 MICRO CH...

Страница 72: ...7 26 Notes ...

Страница 73: ...frequency range of 136 174 MHz and it is a double conversion super heterodyne with 1st IF 45 1 MHz and 2nd IF 455 kHz The receiver is divided into two major blocks Front End and Back End as shown in Figure 8 1 Figure 8 1 VHF Receiver Block Diagram Crystal Filter Crystal 44 645MHz 1st Mixer RF Amp Preselector Filter Postselector Filter RX from Antenna Switch Inj Filter First LO from Synthesizer IF ...

Страница 74: ...U 136 174 MHz The output of the post selector is connected to the single balanced mixer consisting of components L329 L333 Q306 and Q307 1st local signal generated from VCO is filtered by injection filter L310 L331 C325 C326 C327 C333 and C365 to remove second harmonics The converted 1st IF frequency at mixer passes through L331 and matches the 45 1 MHz IF signal to pair crystal filter FL301 8 2 2...

Страница 75: ... channel MOSFET device providing a gain of 12dB The device drain current is drawn directly from the DC battery supply voltage input via L413 A matching network consisting of C417 C418 C419 C420 C455 and a strip line transforms the impedance to approximately 50 Ohm 8 3 2 Antenna Switch An antenna switch works mainly as a switching device between transmit and receive paths In transmit mode PTT Q407 ...

Страница 76: ...wer the bias voltage will be tuned through U402 Extra care has to be taken during the tuning process Do not exceed the maximum allowed bias voltage 8 4 VHF Frequency Generation Circuitry The PLL synthesizer subsystem consists of the reference oscillator VCTCXO VCO PLL IC Charge Pump and Loop Filter Figure 8 3 VHF Frequency Generation Unit Block Diagram 8 4 1 Reference Oscillator 12 8 MHz VCTCXO Th...

Страница 77: ...se to get the best signal to noise ratio The output signal from loop filter is applied to VCO 8 4 5 Dual VCO The dual VCO module contains a RX VCO and a TX VCO They are configured as colpitts oscillators and connected to power up through transistor switches Only one VCO is selected at a time A steering line voltage between 0 35V and 9 7V at varactor CR701 tunes the full RX frequency range from 181...

Страница 78: ...ow and microprocessor detects it For full keypad models the number keys are in matrix type which consisted of 3 rows and 4 columns When any of these keys is pressed the voltage goes low and microprocessor interprets the voltage for each key press Figure 8 4 Keypad Block Diagram KEYPAD Left NUMBERS Right P1 P2 P3 Key Key row Key column 22pin connector Keypad board 22pin connector Main board MCP det...

Страница 79: ...n outputs Troubleshoot Repair as needed replace faulty regulator 5 Flexible Cable fault Check connection of the 12 pin flexible cable between J104 J105 Re assemble or replace flexible cable No RX Audio with LED indication 1 Speaker dead or defective Substitute a good housing with speaker Verify J603 connection Change the housing with accessory Change the housing with accessory 2 Audio Processor IC...

Страница 80: ... Q305 circuitry 4 Check PLL LD port Verify U101 pin 27 is Low Normal Mode Verify U101 pin 27 is swept from low to high Power Save Mode Troubleshoot PLL circuitry Repair Replace U701 Synthesizer Out of Lock No TX Mode 1 Defective 12 8 MHz VCTCXO Verify clock output FL701 pin 3 is 12 8 MHz using high impedance probe Repair replace FL701 2 1 2VCC defective Verify FL701 pin 1 U502 B pin 5 U502 D pin 1...

Страница 81: ...LED indication OK 1 Synthesizer out of lock Refer to Table 9 2 Check U101 operating 2 No TX Enable Verify U101 pin 84 TX EN1 is high when PTT is pressed Verify Q407 collector voltage is approximately 4 7V when PTT is pressed TX EN2 Check U101 pin 85 is high Replace Q407 Check LK2 is short Low Power 1 Low TX injection Check the RF level at Q7 C449 per schematic Troubleshoot Q409 circuitry VCO bias ...

Страница 82: ... MHz input 2 Osc2 3 3 4 VCC 4 7 9 Audio frequency 1 2 12 RSSI out Approximately 1 At 47dBm with conducted 13 N DET BUSY Low At busy 15 GND 0 16 RF input 1 45 1 MHz input U701 PLL IC 1 Reference OSC input 1 4 12 8 MHz input 4 VCC 3 3 6 GND 0 7 XF IN 2 2 8 F IN 2 2 12 Power save High 13 GND 0 14 LD_out High If pll unlock is low 15 P 2 4 16 R Low U601 1 Mode Mute con 0 Audio Amp 2 SVR 3 8 3 IN 3 8 4 ...

Страница 83: ...MHz 4 VCC 5 Q206 N S SW E GND 0 B N S SW 12 5 kHz Low C Collector 12 5 kHz High 25 kHz Low Q304 E 5V 5 At RX Mode B To Q305 collector Low C RX_B 4 7 Q305 E GND 0 At RX Mode B RX_EN High C To Q304 base Low Q503 E GND 0 At TX Mode B TX_EN1 High C To Q706 base Low Q407 E 5V 5 At TX Mode B To Q408 collector Low C TXVB 4 7 Q408 E GND 0 At TX Mode B TX_EN2 High C To Q407 Low Table 9 4 Troubleshooting Ta...

Страница 84: ...xpressed in volts DC relative to ground 0V 2 Voltages are measured with a DC input voltage of 7 50 02 volts DC applied to the battery connector J602 3 All voltages are measured in the squelched receive mode unless otherwise indicated 4 Voltages are identical for VHF and UHF models unless otherwise indicated Table 9 4 Troubleshooting Table for Board and IC Signals VHF Continued IC Designator Pin Pi...

Страница 85: ...V RF are DC level readings which correspond approximately 1 1 to the RF voltage level in mV rms RF voltages in the Receiver Front End and Receiver Back End circuits are measured with an on channel 1mV 47dBm RF signal applied to the antenna jack ANT1 ANT 4 RF voltages on UHF models are measured both with a high impedance RF voltmeter having a bandwidth in excess of 500 MHz levels are expressed in d...

Страница 86: ...WB Switched Battery Voltage BAT Unswitched Battery voltage 10V Digital 10V Regulated RESET Low line reset signal fromU107 to U101 Pin 10 TX_EN1 Transmit enable signal from U101 Pin 84 TX_EN2 Transmit enable signal from U101 Pin 85 TXVB TX operating voltage TX_AF3 TX audio signal from audio processor IC to TX Audio filter TX_SUB_TONE TX sub tone signal from audio processor IC to TX modulation RX_B ...

Страница 87: ...nd Microphone Schematic Figure 10 2 Speaker and Microphone Schematic 10 2 1 Speaker and Microphone Parts List Reference Designator Motorola Part No Description MIC1 PMDN4139_R Microphone SPK1 PMDN4067BR Speaker Cable Plating Au PSR ink Copper Plate Copper Copper Copper Copper Copper Plate PSR ink PrePreg CCL core PrePreg MIC1 SPK1 1 2 1 2 MATES WITH J103 ON RADIO BOARD MATES WITH J603 ON RADIO BOA...

Страница 88: ...C206 0 1uF K C207 0 1uF K C209 560pF C211 0 1uF K Q202 KRC404 20KHZ_SEL N S_SW Q201 KRC404 C342 0 1uF K C381 0 1uF K RX_AF1 BUSY RSSI R210 120K C210 560pF R250 10K CR202 KDS181 R204 22K R211 15K R222 1 2K 8 7 6 5 4 3 2 1 VDD VSS A W CS B NC U D R212 100K RT201 10K TH R213 20K R208 2K 9 1 2 3 4 5 6 7 8 10 11 12 13 14 15 16 C337 10nF CR312 KDS160E R314 100R R316 100K C378 10UF 16V L327 820nH 1608 R3...

Страница 89: ...34 10R 12 8MHz VCXO 4 3 2 1 FL701 7 U502 B NJM324 RT502 47K TH C515 0 1uF R506 10K R503 100K R522 30K R504 47K R505 10K C516 10uF 16V A 1 2VCC 5 6 VCON VCC OUT GND C739 1nF C740 0 1uF C741 0 1uF U701 MB15E03L C755 0 1uF K 3 3V C717 12pF R709 12K 1 R713 10K C719 27pF R710 180R C749 1uF 1608 R717 56R R716 680R C748 0 1uF R718 20K 3 3V 10V R719 1K R720 270R R721 270R R740 1 8K R727 2 7K R728 2 7K C75...

Страница 90: ...K Q406 KRC404 R431 47K U402 8 7 6 5 4 3 2 1 U D NC VSS A B CS W VDD MCP4011 502 R499 1 5K TX_PWR_CS 3 3V TX_EN2 Q408 KRC404 5V Q407 KRA305 C TXVB C438 NA C437 0 1uF R432 47K B 8 7 R427 47K C435 10nF 6 R428 100R R430 100R C413 30pF C421 47pF C410 56pF R412 3 9K R413 8 2K SWB C406 0 1uF Q404 STB1188 Q405 KTC4075 C415 20K R411 3 3K R414 4 7K C411 NA R410 10R R409 10R R406 10R C403 NA C402 NA L401 220...

Страница 91: ...M R185 0R R114 10K DTMF_OUT PLL_LD VOX_EN AK_CSN 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 AK_CLK AK_DATA FUN_KEY2 PRG CLONE_TX PRG CLONE_RX LED GREEN LED RED RIGHT_BUTTON LEFT_BUTTON PGM_BUTTON3 PGM_BUTTON2 PGM_BUTTON1 PTT1 SW_SCAN4 SW_SCAN3 SW_SCAN2 SW_SCAN1 DTMF_CON SW_IN3 SW_IN2 SW_IN1 PLL_CLK PLL_STB PLL_DATA BUSY LIGHT_CON EPP_DATA EPP_CLK VCC2 SQ_CS VSS DTMF...

Страница 92: ...0R R619 10K R613 15K R609 1K R608 NA R621 39K R620 33K C619 33pF R614 560K TDA 8541 U601 IN OUT VCC IN SVR GND OUT MODE 4 3 2 1 8 7 7 6 6 5 5 3 1 2 4 R610 2R2 R615 2R2 C616 0 1uF K C617 0 1uF K J603 53047 0210 SPK1 SM3624X1 J601 0980683Z01 L601 2 2uH 1608 L602 2 2uH 1608 R616 0R C615 0 22uF K 1608 C609 0 1uF K C621 470pF C622 47pF SWB C601 10uF 16V A C606 0 1uF C618 4 7uF 16V A R635 0R C605 4 7uF ...

Страница 93: ... 2K C406 0 1uF C511 22uF 16V B C510 4 7uF 2012 U507 TC1240 C512 470pF 10V 6 1 C507 22uF 16V B C506 470pF C545 22uF 10V A C531 0 1uF NJM324 U502 D R523 30K 1 C533 0 1uF R524 47K 1 1 2 VCC VIN C VOUT 1 14 13 5V 5V 5V 5V 5V 5V 5V 5V 3 3V 3 3V 3 3V 3 3V 3 3V 3 3V 3 3V 3 3V 3 3V 3 3V 3 3V 3 3V 3 3V 3 3V U107_pin1 U106_pin4 U103_pin11 20 U104_pin8 J102_pin16 U104_pin1 Q711 R719 722 R507 U508_pin1 R537 U...

Страница 94: ...47pF PTT1 3 3V FUN_KEY1 FUN_KEY2 R537 1K Q505 KRA305 Q504 KRC404 TX_AF2 PTT2 R529 47K R531 47K R540 47K R530 47K R526 100R R545 4 7k C537 2 2nF U101_PIN31 SDATA FL102 3 5795MHz C120 15pF R180 3 3V C121 33nF C107 0 1uF K C105 15nF R110 270K R118 47K C106 47nF R116 1 2K U101 PIN26 DTMF_IN C104 150pF R117 8 2K 3 3V R181 150R U102 AK2347 C153 1uF K C154 1uF K R150 10K 1 R151 12K 1 U101_PIN72 U101_PIN6...

Страница 95: ...L U106 TC7S66FU SCLK CSN SW VOL1 RY8418 R1001 10K R1002 9 1K C113 560pF C116 27pF C110 22nF C125 47nF C126 33nF R126 15K R122 330K R191 15K R128 3 9K Q103 KRC413 C127 47nF R127 33K C129 47nF C130 33nF C157 0 22uF K C134 0 22uF K NJM324 U105 C TONE_INT RX_TONE_EN C158 0 22uF K Q102 KRC413 5V Q104 KRC413 Q113 KRC404 RX_TONE_CON1 RX_TONE_CON2 1 2VCC R149 100K R129 150K C109 22nF R121 330K NJM324 U105...

Страница 96: ...40 R717 R728 R727 R141 R140 R505 R526 R545 R527 R541 R521 R519 R523 R524 R506 U502 R504 R503 R522 R142 C121 RT502 R528 R734 R729 R753 R752 R751 Q711 Q710 Q708 Q707 R721 R720 C538 U701 C746 L709 C756 C747 R732 Q503 Q114 C127 C116 R216 R206 R207 R168 R117 R116 R1005 R1006 R1004 R167 R110 R133 R136 R115 R185 R148 R118 R165 C206 R203 C204 C214 C208 C198 C158 C110 C156 C125 C136 C129 C104 C139 C105 C10...

Страница 97: ... C370 C343 C344 R310 R315 R335 Q306 Q307 Q303 U201 Q305 Q120 Q121 Q122 Q304 R306 R307 R336 R309 R173 R176 R175 R172 R171 R174 R191 CF1 CF2 Q201 C112 C207 C153 C101 C111 C154 C103 C102 R181 R101 R162 R103 R102 R151 R150 R104 R1003 R1002 R1001 R144 C113 C114 C117 R143 R131 R184 R180 R179 R182 R183 R190 R178 R114 R532 R533 U107 U102 R105 R106 C190 CR101 C191 C501 C507 C541 C506 R139 R537 FL701 U104 R...

Страница 98: ... 11 Circuit Board Schematic Diagram and Parts List VHF 136 174 MHz Figure 10 13 VHF 136 174 MHz Sub Circuit Board Top View PCB No 8421BEACON100 R501 R502 CR501 C563 C564 C562 C565 C566 C560 C561 Q501 Q502 ...

Страница 99: ...Circuit Board Schematic Diagram and Parts List VHF 136 174 MHz 10 12 Figure 10 14 VHF 136 174 MHz Sub Circuit Board Bottom View PCB No 8421BEACON100 SW1 J104 SW VOL1 ...

Страница 100: ...MHz Keypad Board PCB No 8422BEACON100 MIC1 CR110 CR111 CR114 CR115 CR112 CR113 C1018 J101 SH201 C176 C175 C174 C187 R155 R199 R147 C1005 C1004 R196 R197 R198 R161 R160 R159 C1002 C1003 C1006 C1007 R108 R158 R156 C1008 C1001 R109 R112 C1012 C1013 C1014 R119 R157 C1015 J103 C1009 C1010 C1011 Q110 ...

Страница 101: ...05 Z 0 1μF C144 TDK Chip Cap 1005 K 0 1μF C145 TDK Chip Cap 1005 J 15PF C146 TDK Chip Cap 1005 J 15PF C147 TDK Chip Cap 1005 K 0 1μF C153 TDK Chip Cap 1005 K 1μF C154 TDK Chip Cap 1005 K 1μF C156 TDK Chip Cap 1005 K 0 22μF C157 TDK Chip Cap 1005 K 0 22μF C158 TDK Chip Cap 1005 K 0 22μF C161 TDK Chip Cap 1005 J 220PF C162 TDK Chip Cap 1005 J 220PF C163 TDK Chip Cap 1005 J 220PF C164 TDK Chip Cap 10...

Страница 102: ...220PF C368 TDK Chip Cap 1005 K 10nF C376 TDK Chip Cap 1005 Z 0 1μF C378 HITACH Chip Tantal 10uF M 16V A C380 TDK Chip Cap 1005 K 470PF C381 TDK Chip Cap 1005 K 0 1μF C401 TDK Chip Cap 1005 C 5PF C404 TDK Chip Cap 1005 J 15PF C405 TDK Chip Cap 1005 J 20PF C406 TDK Chip Cap 1005 Z 0 1μF C409 TDK Chip Cap 1005 D 8PF C410 TDK Chip Cap 1005 J 56PF C413 TDK Chip Cap 1608 J 30PF C415 KAMAYA Chip Res 1005...

Страница 103: ...K Chip Cap 1005 J 47PF C561 TDK Chip Cap 1005 J 47PF C562 TDK Chip Cap 1005 J 47PF C563 TDK Chip Cap 1005 J 47PF C564 TDK Chip Cap 1005 J 47PF C565 TDK Chip Cap 1005 J 47PF C566 TDK Chip Cap 1005 J 47PF C567 HITACH Chip Tantal 10uF M 16V A C568 TDK Chip Cap 1005 K 10nF C570 TDK Chip Cap 1005 J 47PF C601 HITACH Chip Tantal 10uF M 16V A C602 TDK Chip Cap 1005 K 0 22μF C605 TDK Chip Cap 2012 Z 4 7uF ...

Страница 104: ...c Filter ELFY455F CF2 BGTech 8286045500220 TOKO Ceramic Filter ELFY455H CR110 Bright LED LED DIODE BL HG036D TR CR111 Bright LED LED DIODE BL HG036D TR CR1121 Bright LED LED DIODE BL HG036D TR CR1131 Bright LED LED DIODE BL HG036D TR CR1141 Bright LED LED DIODE BL HG036D TR CR1151 Bright LED LED DIODE BL HG036D TR CR116 KEC SWITCH DIODE KDS 160E ESM CR117 KEC SWITCH DIODE KDS 160E ESM CR201 KEC Sw...

Страница 105: ...UDEN Chip Ind 1608 K 820NH L401 TAIYOYUDEN Chip Ind 1608 220nH J L403 TAIYOYUDEN Chip Ind 1608 220nH J L404 TAIYOYUDEN Chip Ind 1005 J 22N L405 TAIYOYUDEN Chip Ind 1005 J 22N L406 TAIYOYUDEN Chip Ind 1608 220nH J L407 TAIYOYUDEN Chip Ind 1608 220nH J L408 DAERIM COIL AIR 0 28 1 1 6TL SMD L409 DAERIM COIL AIR 0 35 1 6 6TL SMD L410 DAERIM COIL AIR 0 35 1 6 6TL SMD L411 DAERIM COIL AIR 0 35 1 6 6TL S...

Страница 106: ...P Transistor Q707 KEC KTC 4075 BJT NPN Transistor Q708 KEC KTA 2014 BJT PNP Transistor Q709 KEC KTA 2014 BJT PNP Transistor Q710 KEC KTC 4075 BJT NPN Transistor Q711 KEC KRA304 BJT PNP Transistor R101 KAMAYA Chip Res 1005 J 10KΩ R102 KAMAYA Chip Res 1005 J 47KΩ R103 KAMAYA Chip Res 1005 J 150KΩ R104 KAMAYA Chip Res 1005 J 47KΩ R105 KAMAYA Chip Res 1005 J 47KΩ Circuit Ref Supplier Supplier Part No ...

Страница 107: ...A Chip Res 1005 J 0Ω R190 KAMAYA Chip Res 1005 J 15KΩ R191 KAMAYA Chip Res 1005 J 15KΩ R192 KAMAYA Chip Res 1005 J 15KΩ R193 KAMAYA Chip Res 1005 J 10KΩ R194 KAMAYA Chip Res 1005 J 6 8KΩ R195 KAMAYA Chip Res 1005 J 100Ω R196 KAMAYA Chip Res 1005 J 47KΩ R197 KAMAYA Chip Res 1005 J 47KΩ R198 KAMAYA Chip Res 1005 J 47KΩ R199 KAMAYA Chip Res 1005 J 47KΩ R203 KAMAYA Chip Res 1005 J 22KΩ R204 KAMAYA Chi...

Страница 108: ...A Chip Res 1005 J 10KΩ R507 KAMAYA Chip Res 1005 J 10KΩ R508 KAMAYA 1005 J 1KΩ R509 KAMAYA Chip Res 1005 J 2 2KΩ R510 KAMAYA Chip Res 1005 J 15KΩ R511 KAMAYA Chip Res 1005 J 8 2KΩ R512 KAMAYA Chip Res 1005 J 20KΩ R513 KAMAYA Chip Res 1005 J 10KΩ R514 KAMAYA Chip Res 1005 J 24KΩ R515 KAMAYA Chip Res 1005 J 12KΩ R516 KAMAYA Chip Res 1005 J 12KΩ R517 KAMAYA Chip Res 1005 J 15KΩ R518 KAMAYA Chip Res 1...

Страница 109: ...TAIYOYUDEN Thermistor 10K TH RT501 TAIYOYUDEN Thermistor 10K TH RT502 TAIYOYUDEN Thermistor 47K TH SPK1 BG Tech 8400362424100 Speaker 24Ω 1 0W 36θ Connector type SW VOL1 BG Tech 84766N992N151 TOKOS Switch Volume RY 8418 U101 BG Tech 81100303RF020 CPU IC U102 BG Tech 8116AK2347020 AUDIO LSI AK2347 U103 BG Tech 8192088L70020 DTMF RECEIVER MT88L70 U104 BG Tech 811324LC64020 EEPROM IC 24LC64 U105 BG T...

Страница 110: ...10 23 Notes ...

Страница 111: ...he frequency range of 403 447MHz and it is a double conversion super heterodyne with 1st IF 45 1MHz and 2nd IF 455kHz The receiver is divided into two major blocks Front End and Back End as shown in Figure 11 1 Figure 11 1 UHF1 Receiver Block Diagram Crystal Filter Crystal 44 645MHz 1st Mixer RF Amp Preselector Filter Postselector Filter RX from Antenna Switch Inj Filter First LO from Synthesizer ...

Страница 112: ...U 403 447MHz The output of the post selector is connected to the double balanced mixer consisting of components L329 L333 CR316 1st local signal generated from VCO is filtered by injection filter L310 L331 C325 C326 C388 C386 C365 and C387 to remove harmonics The converted 1st IF frequency at mixer passes through L333 and matches the 45 1MHz IF signal to crystal filter FL301 11 2 2 Receiver Back E...

Страница 113: ...nhancement mode N channel MOSFET device providing a gain of 12dB The device drain current is drawn directly from the DC battery supply voltage input via L413 A matching network consisting of C416 C417 C418 C419 C420 C451 C422 C452 and a strip line transforms the impedance to approximately 50Ohm 11 3 2 Antenna Switch An antenna switch works mainly as a switching device between transmit and receive ...

Страница 114: ...tage will be tuned through U402 Extra care has to be taken during the tuning process Do not exceed the maximum allowed bias voltage 11 4 UHF1 Frequency Generation Circuitry The PLL synthesizer subsystem consists of the reference oscillator VCTCXO VCO PLLIC Charge pump and Loop Filter Figure 11 3 UHF1 Frequency Generation Unit Block Diagram 11 4 1 Reference Oscillator 12 8 MHz VCTCXO The reference ...

Страница 115: ...o get the best signal to noise ratio The output signal from loop filter is applied to VCO 11 4 5 Dual VCO The dual VCO module contains a RX VCO and a TX VCO They are configured as colpitts oscillators and connected to power up through transistor switches Only one VCO is selected at a time A steering line voltage between 0 35V and 9 7V at varactor CR701 tunes the fill RX frequency range from 357 9M...

Страница 116: ...low and microprocessor detects it For full keypad models the number keys are in matrix type which consisted of 3 rows and 4 columns When any of these keys is pressed the voltage goes low and microprocessor interprets the voltage for each key press Figure 11 4 Keypad Block Diagram KEYPAD Left NUMBERS Right P1 P2 P3 Key Key row Key column 22pin connector Keypad board 22pin connector Main board MCP d...

Страница 117: ...orts on outputs Troubleshoot Repair as needed replace faulty regulator 5 Flexible Cable fault Check connection of the 12 pin flexible cable between J104 J105 Re assemble or replace flexible cable No RX Audio with LED indication 1 Speaker dead or defective Substitute a good housing with speaker Verify J603 connection Change the housing with accessory Change the housing with accessory 2 Audio Proces...

Страница 118: ...Q304 Q305 circuitry 4 Check PLL LD port Verify U101 Pin 27 is Low Normal Mode Verify U101 Pin 27 is swept from low to high Power Save Mode Troubleshoot PLL circuitry Repair Replace U701 Synthesizer Out of Lock No TX Mode 1 Defective 12 8 MHz VCTCXO Verify clock output FL701 Pin 3 is 12 8 MHz using high impedance probe Repair Replace FL701 2 1 2VCC defective Verify FL701 Pin 1 U502 B Pin 5 U502 D P...

Страница 119: ...indication OK 1 Synthesizer out of lock Refer to Table 12 2 Check U101 operating 2 No TX Enable Verify U101 Pin 84 TX EN1 is high when PTT is pressed Verify Q407 collector voltage is approximately 4 7V when PTT is pressed TX EN2 Check U101 Pin 85 is high Replace Q407 Check LK2 is short Low Power 1 Low TX injection Check the RF level at Q409 C449 per schematic Troubleshoot Q409 circuitry VCO bias 2...

Страница 120: ... 645 MHz input 2 Osc2 3 3 4 VCC 4 7 9 Audio frequency 1 2 12 RSSI out Approximately 1 At 47dBm with conducted 13 N DET BUSY Low At busy 15 GND 0 16 RF input 1 45 1 MHz input U701 PLL IC 1 Reference OSC input 1 4 12 8 MHz input 4 VCC 3 3 6 GND 0 7 XF IN 2 2 8 F IN 2 2 12 Power save High 13 GND 0 14 LD_out High If pll unlock is low 15 P 2 4 16 R Low U601 1 Mode Mute con 0 Audio Amp 2 SVR 3 8 3 IN 3 ...

Страница 121: ...MHz 4 VCC 5 Q206 N S SW E GND 0 B N S SW 12 5 kHz Low C Collector 12 5 kHz High 25 kHz Low Q304 E 5V 5 At RX Mode B To Q305 collector Low C RX_B 4 7 Q305 E GND 0 At RX Mode B RX_EN High C To Q304 base Low Q503 E GND 0 At TX Mode B TX_EN1 High C To Q706 base Low Q407 E 5V 5 At TX Mode B To Q408 collector Low C TXVB 4 7 Q408 E GND 0 At TX Mode B TX_EN2 High C To Q407 Low Table 12 4 Troubleshooting T...

Страница 122: ...xpressed in volts DC relative to ground 0V 2 Voltages are measured with a DC input voltage of 7 50 02 volts DC applied to the battery connector J602 3 All voltages are measured in the squelched receive mode unless otherwise indicated 4 Voltages are identical for VHF and UHF models unless otherwise indicated Table 12 4 Troubleshooting Table for Board and IC Signals UHF1 Continued IC Designator Pin ...

Страница 123: ...mV RF are DC level readings which correspond approximately 1 1 to the RF voltage level in mV rms RF voltages in the Receiver Front End and Receiver Back End circuits are measured with an on channel 1mV 47dBm RF signal applied to the antenna jack ANT1 ANT 4 RF voltages on UHF models are measured both with a high impedance RF voltmeter having a bandwidth in excess of 500 MHz levels are expressed in ...

Страница 124: ...WB Switched Battery Voltage BAT Unswitched Battery voltage 10V Digital 10V Regulated RESET Low line reset signal fromU107 to U101 Pin 10 TX_EN1 Transmit enable signal from U101 Pin 84 TX_EN2 Transmit enable signal from U101 Pin 85 TXVB TX operating voltage TX_AF3 TX audio signal from audio processor IC to TX Audio filter TX_SUB_TONE TX sub tone signal from audio processor IC to TX modulation RX_B ...

Страница 125: ...nd Microphone Schematic Figure 13 2 Speaker and Microphone Schematic 13 2 1 Speaker and Microphone Parts List Reference Designator Motorola Part No Description MIC1 PMDN4139_R Microphone SPK1 PMDN4067BR Speaker Cable Plating Au PSR ink Copper Plate Copper Copper Copper Copper Copper Plate PSR ink PrePreg CCL core PrePreg MIC1 SPK1 1 2 1 2 MATES WITH J103 ON RADIO BOARD MATES WITH J603 ON RADIO BOA...

Страница 126: ...13 1 Circuit Board Schematic Diagram and Parts List UHF1 403 447 MHz 13 3 Circuit Board Schematic Diagram and Parts List UHF1 403 447 MHz Figure 13 3 UHF1 403 447 MHz Receiver Schematic Diagram ...

Страница 127: ...Circuit Board Schematic Diagram and Parts List UHF1 403 447 MHz 13 2 Figure 13 4 VCO and PLL Schematic Diagram ...

Страница 128: ...13 3 Circuit Board Schematic Diagram and Parts List UHF1 403 447 MHz Figure 13 5 Transmitter Schematic Diagram ...

Страница 129: ...Circuit Board Schematic Diagram and Parts List UHF1 403 447 MHz 13 4 Figure 13 6 Microprocessor and Keypad Schematic Diagram ...

Страница 130: ...13 5 Circuit Board Schematic Diagram and Parts List UHF1 403 447 MHz Figure 13 7 Audio Power Amplifier and External Audio Schematic Diagram ...

Страница 131: ...Circuit Board Schematic Diagram and Parts List UHF1 403 447 MHz 13 6 Figure 13 8 Switches and Battery Schematic Diagram ...

Страница 132: ...13 7 Circuit Board Schematic Diagram and Parts List UHF1 403 447 MHz Figure 13 9 Transmitter Audio Filter and Sub tone Schematic Diagram ...

Страница 133: ...6 C1023 C134 C139 C1029 Q103 Q113 Q104 Q102 C126 C539 C538 C746 C756 C747 C738 C748 C752 C749 R718 R716 R728 R727 C741 C750 C753 C751 C755 Q707 Q708 Q711 R717 Q710 C754 R740 R726 R729 R735 R736 R737 TP11 Q709 R731 R720 R730 R721 R722 R723 R724 R725 R719 R733 U701 L709 R732 Q503 SH102 C128 C130 C157 R129 R204R217 C127 C135 C137 C1031 C1037 TP4 TP3 FL101 TP8 TP2 TP6 TP5 TP7 J102 C576 C577 R520 R521 ...

Страница 134: ...423 C452 C416 C418 C413 L405 C417 L406 L403 L402 L401 C410 Q402 Q401 Q409 C444 C448 C731 R714 C728 C701 C715 C706 R704 C719 C711 C726 C724 C730 C729 C716 R709 C718 C721 C723 C722 C712 C710 C101 C102 C153 L703 L704 R162 R101 R181 R103 R102 R151 R150 R104 R105 R106 R540 R139 C503 C506 C541 C144 R113 R131 R184 R180 R179 R182 R183 R190 R178 R532 R533 R534 R535 R530 R531 R529 R152 R195 R120 R114 TP15 T...

Страница 135: ...cuit Board Schematic Diagram and Parts List UHF1 403 447 MHz 13 10 Figure 13 12 UHF1 403 447 MHz Sub Circuit Board Top View PCB No 8421BEACON100 R501 R502 CR501 C563 C564 C562 C565 C566 C560 C561 Q501 Q502 ...

Страница 136: ...13 11 Circuit Board Schematic Diagram and Parts List UHF1 403 447 MHz Figure 13 13 UHF1 403 447 MHz Sub Circuit Board Bottom View PCB No 8421BEACON100 SW1 J104 SW VOL1 ...

Страница 137: ...z Keypad Board PCB No 8422BEACON100 MIC1 CR110 CR114 CR112 CR113 CR115 CR111 R119 R157 R112 R109 R158 R156 R159 R160 R161 R198 R197 R196 C1011 C1004 C187 C174 C175 C176 C1018 J101 SH202 R155 Q110 C1005 R147 R199 C1010 C1009 SH201 C1008 C1001 R108 C1014 C1013 C1012 C1006 C1003 C1002 C1007 J103 C1015 ...

Страница 138: ...005 K 0 1μF C156 TDK N A Chip Cap 1005 K 0 22μF C157 TDK N A Chip Cap 1005 K 0 22μF C158 TDK N A Chip Cap 1005 K 0 22μF C161 TDK N A Chip Cap 1005 J 220PF C162 TDK N A Chip Cap 1005 J 220PF C163 TDK N A Chip Cap 1005 J 220PF C164 TDK N A Chip Cap 1005 J 220PF C165 TDK N A Chip Cap 1005 J 220PF C166 TDK N A Chip Cap 1005 J 220PF C167 TDK N A Chip Cap 1005 J 220PF C168 TDK N A Chip Cap 1005 J 220PF ...

Страница 139: ...3 TDK N A Chip Cap 1608 J 27PF C416 TDK N A Chip Cap 1608 C 8PF C417 TDK N A Chip Cap 1608 C 8PF C418 TDK N A Chip Cap 1608 J 15PF C419 TDK N A Chip Cap 1608 C 6PF C420 TDK N A Chip Cap 1608 J 12PF C422 TDK N A Chip Cap 1608 C 8PF C426 TDK N A Chip Cap 1608 D 7PF C427 TDK N A Chip Cap 1608 C 4PF C428 TDK N A Chip Cap 1608 D 7PF C429 TDK N A Chip Cap 1608 C 3PF C431 TDK N A Chip Cap 1608 J 1nF C432...

Страница 140: ... 1005 J 47PF C576 TDK N A Chip Cap 1608 J 47PF C577 TDK N A Chip Cap 1005 J 47PF C578 TDK N A Chip Cap 1005 J 47PF C579 TDK N A Chip Cap 1005 J 47PF C580 TDK N A Chip Cap 1005 J 47PF C581 TDK N A Chip Cap 1005 J 47PF C582 TDK N A Chip Cap 1005 J 47PF C583 TDK N A Chip Cap 1005 J 47PF C601 TDK N A Chip Cap 1005 Z 0 1μF C602 TDK N A Chip Cap 1005 K 0 22μF C605 TDK N A Chip Cap 2012 Z 4 7μF C606 TDK ...

Страница 141: ...N A Chip Cap 1005 J 47PF C1028 TDK N A Chip Cap 1005 J 47PF C1029 TDK N A Chip Cap 1005 J 47PF C1030 TDK N A Chip Cap 1005 J 47PF C1031 TDK N A Chip Cap 1005 J 47PF C1032 TDK N A Chip Cap 1005 J 47PF C1033 TDK N A Chip Cap 1005 J 47PF C1034 TDK N A Chip Cap 1005 J 47PF C1035 TDK N A Chip Cap 1005 J 47PF C1036 TDK N A Chip Cap 1005 J 47PF C1037 TDK N A Chip Cap 1005 J 47PF C1038 TDK N A Chip Cap 10...

Страница 142: ...5 TAIYOYUDEN N A Chip Ind 1608 6 8nH J L406 TAIYOYUDEN N A ChipInd 1608220nHJ L407 TAIYOYUDEN N A Chip Ind 1005 J 33nH L409 DAERIM N A COIL AIR 0 45 1 4 3TL SMD L410 DAERIM N A COIL AIR 0 45 1 4 3TL SMD L411 DAERIM N A COIL AIR 0 45 1 4 3TL SMD L412 TAIYOYUDEN N A Chip Ind 1608 220nH J L413 DAERIM N A COIL AIR 0 35 1 6 7TL SMD L601 TAIYOYUDEN N A Chip Ind 1608 K 2 2uH L602 TAIYOYUDEN N A Chip Ind ...

Страница 143: ...Chip Res 1005 J 3 9KW R1081 KAMAYA N A Chip Res 1005 J 4 7KW R1091 KAMAYA N A Chip Res 1005 J 4 7KW R110 KAMAYA N A Chip Res 1005 J 270KW R1121 KAMAYA N A Chip Res 1005 J 4 7KW R113 KAMAYA N A Chip Res 1005 J 47KW R114 KAMAYA N A Chip Res 1005 J 10KW R115 KAMAYA N A Chip Res 1005 J 10KW R116 KAMAYA N A Chip Res 1005 J 1 2KW R117 KAMAYA N A Chip Res 1005 J 8 2KW R118 KAMAYA N A Chip Res 1005 J 47KW...

Страница 144: ...MAYA N A Chip Res 1005 J 56KW R309 KAMAYA N A Chip Res 1005 J 8 2KW R310 KAMAYA N A Chip Res 1005 J 5 6KW R311 KAMAYA N A Chip Res 1005 J 330W R312 KAMAYA N A Chip Res 1005 J 150KW R314 KAMAYA N A Chip Res 1005 J 100W R315 KAMAYA N A Chip Res 1005 J 100W R316 KAMAYA N A Chip Res 1005 J 100KW R317 KAMAYA N A Chip Res 1005 J 180KW R318 KAMAYA N A Chip Res 1005 J 2 7KW R319 KAMAYA N A Chip Res 1005 J...

Страница 145: ...J 330KW R540 KAMAYA N A Chip Res 1005 J 47KW R541 KAMAYA N A Chip Res 1005 J 330KW R609 KAMAYA N A Chip Res 1005 J 1KW R610 KAMAYA N A Chip Res 1005 J 2 2W R613 KAMAYA N A Chip Res 1005 J 15KW R614 KAMAYA N A Chip Res 1005 J 390KW R615 KAMAYA N A Chip Res 1005 J 2 2W R616 KAMAYA N A Chip Res 1005 J 0W R619 KAMAYA N A Chip Res 1005 J 10KW R620 KAMAYA N A Chip Res 1005 J 33KW R621 KAMAYA N A Chip Re...

Страница 146: ...DTMF RECEIVER MT88L70 U104 BGTech 811324LC64020 EEPROM IC 24LC64 U105 BGTech 8124000324011 OP AMP NJM324 U106 BGTech 8135TC7S66020 Analog SW IC TC7S66FU U107 BGTech 81287027AT020 VOLTAGE DETECTOR KIA7027AT U201 BGTech 8125311360020 FM IC TA31136 U202 BGTech 8191401150220 DIGITAL POTENTIOME TER MCP4011 502 U401 BGTech 8124000358011 OP AMP DUAL KIA358 U402 BGTech 8191401150220 DIGITAL POTENTIOME TER...

Страница 147: ...ginal end user purchaser only and is not assignable or transferable to any other party This is the complete warranty for the Product manufactured by MOTOROLA MOTOROLA assumes no obligations or liability for additions or modifications to this warranty unless made in writing and signed by an officer of MOTOROLA Unless made in a separate agreement between MOTOROLA and the original end user purchaser ...

Страница 148: ...cts or damage resulting from use of the Product in other than its normal and customary manner Defects or damage from misuse accident water or neglect Defects or damage from improper testing operation maintenance installation alteration modification or adjustment Breakage or damage to antennas unless caused directly by defects in material workmanship A Product subjected to unauthorized Product modi...

Страница 149: ...tion will be an equal amount per year over the lifetime of the Product or parts as established by MOTOROLA MOTOROLA will have no liability with respect to any claim of patent infringement which is based upon the combination of the Product or parts furnished hereunder with software apparatus or devices not furnished by MOTOROLA nor will MOTOROLA have any liability for the use of ancillary equipment...

Страница 150: ...cluded this generally means that no user serviceable parts are available for that kit or assembly All orders for parts information should include the complete Motorola identification number Request for help in identification of non referenced spare parts should be directed to the Motorola s local area representation When damaged parts are replaced identical parts should be used If the identical re...

Страница 151: ...tered or reprogrammed FGU Frequency Generation Unit GaAs Gallium Arsenide a type of crystalline material used in some semiconductors GKC Good Key Chirp ISW Inbound Signalling Word data transmitted on the control channel from a subscriber unit to the central control unit LH DATA Longhorn Data a bidirectional 0 5V RS 232 line protocol that uses the microcontroller s integrated RS 232 asynchronous se...

Страница 152: ...th RPT TA Repeater Talk Around Softpot A computer adjustable electronic attenuator Software Computer programs procedures rules documentation and data pertaining to the operation of a system SPI clock and data lines Serial Peripheral Interface how the microcontroller communicates to modules and ICs through the CLOCK and DATA lines Squelch Muting of audio circuits when received signal levels fall be...

Страница 153: ......

Страница 154: ...orola Inc All rights reserved Motorola Technology Sdn Bhd Co No 455657 H Plot 2 Bayan Lepas Technoplex Industrial Park Mukim 12 S W D 11900 Penang Malaysia Printed in Malaysia August 2009 6878422A01 B 6878422A01 ...

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