Motorola Portable Radio Ep450 Detailled Hkln4216c Manual
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HKLN4216CJune, 2005 UHF Troubleshooting Tables: Troubleshooting Table for Board and IC Signals 12-15 U480 Dual Opamp1 Unit 1 output 2.48 2Unit 1 (-) input2.48 3 Unit 1 (+) input 2.46 4GroundGND 5 Unit 2 (+) input 0.28 6Unit 2 (-) input0.29 7 Unit 2 output 0 8Vcc4.96 U490 Audio Power Amp1 Enable/shutdown 0.12 (Unsquelched) 2Bias reference3.26(Unsquelched) 3 (+) input 3.26 (Unsquelched) 4(-) input3.27(Unsquelched) 5 (-) output 3.25 (Unsquelched) 6Vcc7.48(Unsquelched) 7 Ground GND 8(+) output3.29(Unsquelched) U510 Dual Opamp1 Unit 1 output 1.75 2Unit 1 (-) input1.56 3 Unit 1 (+) input 1.55 4GroundGND 5 Unit 2 (+) input 1.55 6Unit 2 (-) input1.56 7 Unit 2 output 1.38 8Vcc4.96 1. All voltages are measured with a high-impedance digital voltmeter and expressed 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 (J301). 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 (Continued) IC Designator Pin Pin Function DC Voltage Comments (Condition)
June, 2005HKLN4216C Notes: 12-16UHF Troubleshooting Tables: Troubleshooting Table for Board and IC Signals
Chapter 13 UHF Schematic Diagrams, Overlays, and Parts Lists 13.1 Introduction This section provides schematic diagrams, overlays, and parts lists for the radio circuit boards and interface connections. 13.1.1 Notes For All Schematics and Circuit Boards * Component is frequency sensitive. Refer to the Electrical Parts List for value and usage. 1. Unless otherwise stated, resistance values are in ohms (K = 1000), capacitance values are in picofarads (pF) or microfarads (µF), and inductance values are in nanohenries (nH) or micro- henries (µH). 2. DC voltages are measured from point indicated to chassis ground using a Motorola DC multi- meter or equivalent. If the board has been removed from the chassis, the transmitter module mounting screws may be used for ground connection. (Note: The antenna nut bracket is not connected to ground.) Operating mode dependent voltages are followed by (RX) for receive mode, (TX) for transmit mode, (UNSQ) for unsquelched mode, etc. 3. RF voltages on VHF models are measured with a Fluke model 85 RF probe. The indicated voltages expressed in 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 100 mV (-7 dBm) RF signal applied to the antenna jack J140. 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 dBm) and with a Fluke model 85 RF probe [levels are expressed in mV (RF)]. These indicated voltages are DC level readings which correspond approximately 1:1 to the RF voltage level in mV rms, and are only approxi- mate for UHF frequency measurements. RF voltages in the Receiver Front End and Receiver Back End circuits are measured with an on-channel 100 mV (-7 dBm) RF signal applied to the antenna jack J140. 5. Audio voltages are measured with a high-impedance AC rms voltmeter. The indicated volt- ages are expressed in mV rms. Receive mode voltages are followed by (RX) and are mea- sured with an on-channel signal with 1 kHz modulation at 60% deviation (3 kHz for 25 kHz channels, or 1.5 kHz for 12.5 kHz channels). Transmit mode voltages are followed by (TX) and are measured with a 1 kHz, 10 mV rms signal present at the external microphone input (accessory connector J471 pin 4 hot and pin 7 ground). 6. Reference Designators are assigned in the following manner: Ref. No. Series Circuit Block 1-99RF Front End 100-149 Transmitter RF Stages 150-200Transmitter Power Control 201-250 Frequency Synthesizer 251-300VCO
June, 2005HKLN4216C 13-2UHF Schematic Diagrams, Overlays, and Parts Lists: Introduction 7. Circuit Block Interconnection Legend: 301-400 DC Regulation 401-450Microprocessor 451-550 Audio Name Description USWB+Unswitched Battery Voltage (always on) 5V 5 volts (regulated) 5R5 volts in RX mode only 5T 5 volts in TX mode only RESETLow-line reset signal from U320 to uP D3_3V Digital 3.3 volts (regulated) 3VAnalog 3 volts (regulated) TX_ENA Transmit enable signal from uP to transmitter PWR_SETDC voltage from ASFIC to TX power control DEMOD RX audio from backend to ASFIC BW_SELBackend filter BW select from ASFIC RSSI RX signal strength indication from IFIC to uP IF_IN/OUT44.85 MHz from 1st mixer to high IF filter RF_IN/OUT RX signal from antenna switch to front end MOD OUT/INTX modulation from ASFIC to synthesizer 16_8_MHZ Ref osc signal from synthesizer to ASFIC SYNTH_CSSynthesizer chip select from uP SPI_CLK Serial clock from uP SPI_DATA_OUTSerial data from uP LOCK Lock detect indication from synth to uP PRESCVCO freq feedback from VCOBIC to synth V_STEER Steering line voltage from synth to VCOs V_SFSuper-filtered 4.5 volts from synth to VCOBIC VCO_MOD TX modulation from ASFIC to synthesizer TRBTX/RX control from synth to VCOBIC RX_INJ Buffered RX VCO output to RX 1st mixer TX_INJTX VCO output to transmitter input Ref. No. Series Circuit Block
HKLN4216CJune, 2005 UHF Schematic Diagrams, Overlays, and Parts Lists: Speaker and Microphone Schematic 13-3 13.1.2 Six Layer Circuit Board Figure 13-1. Six-Layer Circuit Board: Copper Steps in Layer Sequence 13.2 Speaker and Microphone Schematic Figure 13-2. Speaker and Microphone Schematic 13.2.1 Speaker and Microphone Parts List Reference DesignatorMotorola Part No.Description MK15085880L01Microphone, electret SP1 5085738Z08 Speaker assembly with connector LAYER 1 (L1) LAYER 2 (L2) LAYER 3 (L3) LAYER 4 (L4) LAYER 5 (L5) LAYER 6 (L6) INNER LAYERS SIDE 1 SIDE 2 MK1 SP11 2 1 2MATES WITH J470 ON RADIO BOARD MATES WITH J491 ON RADIO BOARD
June, 2005HKLN4216C Notes: 13-4UHF Schematic Diagrams, Overlays, and Parts Lists: Speaker and Microphone Schematic
INDEX A Antenna Matching Network, UHF 403-440 MHz Theory Of Operation ...............................8-4 Antenna Matching Network, UHF 438-470 MHz Theory Of Operation ...............................9-4 Antenna Matching Network, UHF 465-495 MHz Theory Of Operation .............................10-4 Antenna Matching Network, UHF 490-527 MHz Theory Of Operation ............................. 11-4 Antenna Matching Network, VHF 136-162 MHz Theory Of Operation................................4-4 Antenna Matching Network, VHF 146-174 MHz Theory Of Operation................................5-4 Antenna Switch, UHF 403-440 MHz Theory Of Operation..................................................8-3 Antenna Switch, UHF 438-470 MHz Theory Of Operation..................................................9-3 Antenna Switch, UHF 465-495 MHz Theory Of Operation................................................10-3 Antenna Switch, UHF 490-527 MHz Theory Of Operation................................................ 11-3 Antenna Switch, VHF 136-162 MHz Theory Of Operation ..................................................4-3 Antenna Switch, VHF 146-174 MHz Theory Of Operation ..................................................5-3 Audio Circuitry Theory of Operation ....................................................................................3-4 Audio Power Amplifier Theory of Operation ........................................................................3-5 B Battery Charging Through Microphone Jack Controller Theory of Operation .....................3-6 Battery Gauge Controller Theory of Operation....................................................................3-4 Boot Mode Control Controller Theory of Operation .............................................................3-4 C Computer Software Copyrights .............................................................................................. ii Control and Indicator Interface Controller Theory of Operation ..........................................3-2 Controller Theory of Operation ............................................................................................3-1 Controller .......................................................................................................................3-1 Microprocessor Circuitry ..........................................................................................3-1 Memory Usage ..................................................................................................3-2 Control and Indicator Interface ..........................................................................3-2 Serial Bus Control of Circuit Blocks ..................................................................3-2 Interface to RSS Programming .........................................................................3-3 Storage of Customer-Specific Information .........................................................3-3 Sensing of Externally-Connected Accessories ..................................................3-3 Microprocessor Power-Up, Power-Down and Reset Routine............................3-3 Boot Mode Control.............................................................................................3-4 Microprocessor 7.3975 MHz Clock....................................................................3-4 Battery Gauge ...................................................................................................3-4 Audio Circuitry ...............................................................................................................3-4 Transmit and Receive Low-Level Audio Circuitry ..............................................3-4 Audio Power Amplifier .......................................................................................3-5 Internal Microphone Audio Voice Path ..............................................................3-5 PTT Circuits .......................................................................................................3-6 VOX Operation ..................................................................................................3-6 Battery Charging Through Microphone Jack .....................................................3-6 Programming and Flashing Through Microphone Jack .....................................3-6
June, 2005HKLN4216C 2INDEX: D DC Power Distribution Theory of Operation ........................................................................ 2-1 DC Regulation and Distribution Theory of Operation .......................................................... 2-1 Disclaimer .............................................................................................................................. ii Document Copyrights.............................................................................................................ii E F Foreword ................................................................................................................................ ii Fractional-N Synthesizer, UHF 403-440 MHz Theory Of Operation ................................... 8-5 Fractional-N Synthesizer, UHF 438-470 MHz Theory Of Operation ................................... 9-5 Fractional-N Synthesizer, UHF 465-495 MHz Theory Of Operation ................................. 10-5 Fractional-N Synthesizer, UHF 490-527 MHz Theory Of Operation ................................. 11-5 Fractional-N Synthesizer, VHF 136-162 MHz Theory Of Operation ................................... 4-5 Fractional-N Synthesizer, VHF 146-174 MHz Theory Of Operation ................................... 5-5 Frequency Generation Circuitry, UHF 403-440 MHz Theory Of Operation......................... 8-4 Frequency Generation Circuitry, UHF 438-470 MHz Theory Of Operation......................... 9-4 Frequency Generation Circuitry, UHF 465-495 MHz Theory Of Operation....................... 10-4 Frequency Generation Circuitry, UHF 490-527 MHz Theory Of Operation....................... 11-4 Frequency Generation Circuitry, VHF 136-162 MHz Theory Of Operation ......................... 4-4 Frequency Generation Circuitry, VHF 146-174 MHz Theory Of Operation ......................... 5-4 G H Harmonic Filter, UHF 403-440 MHz Theory Of Operation .................................................. 8-3 Harmonic Filter, UHF 438-470 MHz Theory Of Operation .................................................. 9-3 Harmonic Filter, UHF 465-495 MHz Theory Of Operation ................................................ 10-3 Harmonic Filter, UHF 490-527 MHz Theory Of Operation ................................................ 11-3 Harmonic Filter, VHF 136-162 MHz Theory Of Operation .................................................. 4-3 Harmonic Filter, VHF 146-174 MHz Theory Of Operation .................................................. 5-3 I Interface to RSS Programming Controller Theory of Operation.......................................... 3-3 Internal Microphone Audio Voice Path Theory of Operation ............................................... 3-5 Introduction, UHF 403-440 MHz Theory Of Operation........................................................ 8-1 Introduction, UHF 438-470 MHz Theory Of Operation........................................................ 9-1 Introduction, UHF 465-495 MHz Theory Of Operation...................................................... 10-1 Introduction, UHF 490-527 MHz Theory Of Operation...................................................... 11-1 Introduction, UHF Schematic Diagrams, Overlays, and Parts Lists .................................. 12-1 Introduction, VHF Schematic Diagrams, Overlays, and Parts Lists .................................... 7-1 Introduction, VHF 136-162 MHz Theory Of Operation ........................................................ 4-1 Introduction, VHF 146-174 MHz Theory Of Operation ........................................................ 5-1 J K
HKLN4216CJune, 2005 INDEX: 3 Keypad, UHF 403-440 MHz Theory Of Operation ..............................................................8-7 Keypad, UHF 438-470 MHz Theory Of Operation ..............................................................9-7 Keypad, UHF 465-495 MHz Theory Of Operation ............................................................10-7 Keypad, UHF 490-527 MHz Theory Of Operation ............................................................ 11-7 Keypad, VHF 136-162 MHz Theory Of Operation...............................................................4-7 Keypad, VHF 146-174 MHz Theory Of Operation...............................................................5-7 L List of Figures ......................................................................................................................... x List of Tables ........................................................................................................................xiii M Memory Usage Controller Theory of Operation ..................................................................3-2 Microprocessor 7.3975 MHz Clock Controller Theory of Operation ....................................3-4 Microprocessor Circuitry Controller Theory of Operation ....................................................3-1 Microprocessor Power-Up, Power-Down and Reset Routine Controller Theory of Operation........................................................................................................3-3 N Notes For All Schematics and Circuit Boards, UHF ..........................................................12-1 Notes For All Schematics and Circuit Boards, VHF ............................................................7-1 O P Power Control, UHF 403-440 MHz Theory Of Operation ....................................................8-4 Power Control, UHF 438-470 MHz Theory Of Operation l ..................................................9-4 Power Control, UHF 465-495 MHz Theory Of Operation ..................................................10-4 Power Control, UHF 490-527 MHz Theory Of Operation .................................................. 11-4 Power Control, VHF 136-162 MHz Theory Of Operation ....................................................4-4 Power Control, VHF 146-174 MHz Theory Of Operation ....................................................5-4 Product Safety and RE Exposure Compliance....................................................................... ii Programming and Flashing Through Microphone Jack Controller Theory of Operation .....3-6 PTT Circuits Controller Theory of Operation .......................................................................3-6 Q R Receiver Back End, UHF 403-440 MHz Theory Of Operation ............................................8-2 Receiver Back End, UHF 438-470 MHz Theory Of Operation ............................................9-2 Receiver Back End, UHF 465-495 MHz Theory Of Operation ..........................................10-2 Receiver Back End, UHF 490-527 MHz Theory Of Operation .......................................... 11-2 Receiver Back-End, VHF 136-162 MHz Theory Of Operation ............................................4-2 Receiver Back-End, VHF 146-174 MHz Theory Of Operation ............................................5-2 Receiver Front End, UHF 403-440 MHz Theory Of Operation............................................8-1 Receiver Front End, UHF 438-470 MHz Theory Of Operation............................................9-1 Receiver Front End, UHF 465-495 MHz Theory Of Operation..........................................10-1 Receiver Front End, UHF 490-527 MHz Theory Of Operation.......................................... 11-1
June, 2005HKLN4216C 4INDEX: Receiver Front-End, VHF 136-162 MHz Theory Of Operation ........................................... 4-1 Receiver Front-End, VHF 146-174 MHz Theory Of Operation ........................................... 5-1 Receiver, UHF 403-440 MHz Theory Of Operation ............................................................ 8-1 Receiver, UHF 438-470 MHz Theory Of Operation ............................................................ 9-1 Receiver, UHF 465-495 MHz Theory Of Operation .......................................................... 10-1 Receiver, UHF 490-527 MHz Theory Of Operation .......................................................... 11-1 Receiver, VHF 136-162 MHz Theory Of Operation............................................................. 4-1 Receiver, VHF 146-174 MHz Theory Of Operation............................................................. 5-1 Related Publications ............................................................................................................xiii S Sensing of Externally-Connected Accessories Controller Theory of Operation .................. 3-3 Serial Bus Control of Circuit Controller Blocks Theory of Operation ................................... 3-2 Service Aids ........................................................................................................................ 1-2 Six Layer Circuit Board, UHF ............................................................................................ 12-3 Six Layer Circuit Board, VHF .............................................................................................. 7-3 Speaker and Microphone Parts List, UHF ......................................................................... 12-3 Speaker and Microphone Parts List, VHF ........................................................................... 7-3 Speaker and Microphone Schematic, UHF ....................................................................... 12-3 Speaker and Microphone Schematic, VHF ......................................................................... 7-3 Storage of Customer-Specific Information Controller Theory of Operation ......................... 3-3 T Test Equipment, Service Aids, and Service Tools ............................................................... 1-1 Test Equipment ................................................................................................................... 1-1 Service Aids .................................................................................................................. 1-2 Transmit and Receive Low-Level Audio Circuitry Theory of Operation .............................. 3-4 Transmitter Power Amplifier, UHF 403-440 MHz Theory Of Operation .............................. 8-3 Transmitter Power Amplifier, UHF 438-470 MHz Theory Of Operation .............................. 9-3 Transmitter Power Amplifier, UHF 465-495 MHz Theory Of Operation ............................ 10-3 Transmitter Power Amplifier, UHF 490-527 MHz Theory Of Operation ............................ 11-3 Transmit Power Amplifier, VHF 136-162 MHz Theory Of Operation ................................... 4-3 Transmit Power Amplifier, VHF 146-174 MHz Theory Of Operation ................................... 5-3 Transmitter, UHF 403-440 MHz Theory Of Operation ........................................................ 8-3 Transmitter, UHF 438-470 MHz Theory Of Operation ........................................................ 9-3 Transmitter, UHF 465-495 MHz Theory Of Operation ...................................................... 10-3 Transmitter, UHF 490-527 MHz Theory Of Operation ...................................................... 11-3 Transmitter, VHF 136-162 MHz Theory Of Operation......................................................... 4-3 Transmitter, VHF 146-174 MHz Theory Of Operation......................................................... 5-3 Troubleshooting Tables, UHF............................................................................................ 12-1 Troubleshooting Table for Board and IC Signals, UHF ..................................................... 12-6 Troubleshooting Table for Board and IC Signals, VHF ....................................................... 6-6 Troubleshooting Table for Receiver, UHF ......................................................................... 12-1 Troubleshooting Table for Receiver, VHF ........................................................................... 6-1 Troubleshooting Table for Synthesize, UHF...................................................................... 12-3 Troubleshooting Table for Synthesize, VHF ........................................................................ 6-3 Troubleshooting Table for Transmitter, UHF ..................................................................... 12-4 Troubleshooting Table for Transmitter, VHF........................................................................ 6-4