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Motorola EP450, Service Manual

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Motorola EP450 Service Manual Download Page 141

11-32

UHF 438-470 MHz Schematic Diagrams, Overlays, and Parts Lists

November 24, 2003

HKLN4216A

1

2

DC Regulation

Q493

3

100K

R322

390pF

C301

100

R507

Q311

D301

C313

.01uF

150pF

C323

U330

TK71730S

BYPASS

4

CTRL

3

GND

2

1

VIN VOUT 5

.01uF

R506

C304

10uF

C312

100

C302

390pF

10uF

C334

F301

3A

C333

.01uF

U310

TK71750S

BYPASS

4 CTRL

3

GND

2

1 VIN VOUT 5

R310
100K

VR302

MMBZ5250B

20V

C316

1200pF

100K

NC

SHUTDOWN

8

TAP

3

R509

ERROR

7

FEEDBACK

2

GND

1

INPUT

4

OUTPUT

5

SENSE

6

C305

100pF

LP2986

U320

C331

.01uF

330K

1%

R320

10uF

1200pF

C321

R313

C315

R312

10K

HIGH

T

AB1

6

T

AB2

7

2

NC

20K

S444

SWITCH

4

1

LOW

5

3

100K

R508

.01uF

C322

C303

33uF

Q494

2

6

4

1

3

.018uF

C320

Q313

.01uF

D3_3V

C306

Q312

.01uF

C310

R510

330K

D3_3V

.018uF

C311

NC

TP302

1

R321

1%

200K

C314

1200pF

D3_3V

20V

MMBZ5250B

VR301

NEG

POS

100K

R311

SWB+

BATT_CHARGE

NC

J301

DATA

D3_3V

3V

RESET

VOLUME

ON_OFF

5T

USWB+

RX_ENA

5V

TX_ENA

5R

Figure 11-25. UHF (438-470 MHz) PCB 8486348Z13-C Audio Circuitry Schematic Diagram

Summary of Contents for EP450

Page 1: ... are trademarks of Motorola Inc All other product or service names are the property of their respective owners 2003 Motorola Inc All rights reserved Printed in U S A HKLN4216A HKLN4216A EP450 Portable Radio Detailed Service Manual ...

Page 2: ...EP450 Portable Radio Detailed Service Manual VHF 146 174 MHz UHF 403 440 MHz UHF 438 470 MHz UHF 465 495 MHz Motorola Inc 1301 E Algonquin Road Schaumburg IL 60196 HKLN4216A ...

Page 3: ...nual 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 either directly or by implication estoppel or otherwise any license under the copyrights patents or patent applications of Motorola except for the normal non exclusive license to use ...

Page 4: ...rocessor Circuitry 3 1 3 1 1 1 Memory Usage 3 2 3 1 1 2 Control and Indicator Interface 3 2 3 1 1 3 Serial Bus Control of Circuit Blocks 3 2 3 1 1 4 Interface to RSS Programming 3 3 3 1 1 5 Storage of Customer Specific Information 3 3 3 1 1 6 Sensing of Externally Connected Accessories 3 3 3 1 1 7 Microprocessor Power Up Power Down and Reset Routine 3 3 3 1 1 8 Boot Mode Control 3 4 3 1 1 9 Microp...

Page 5: ... Speaker and Microphone Schematic 6 3 6 2 1 Speaker and Microphone Parts List 6 3 Figure 6 3 VHF 146 174 MHz Radio Circuit Block Interconnect Diagram 6 5 Figure 6 4 VHF 146 174 MHz Receiver Front End Schematic Diagram 6 6 Figure 6 5 VHF 146 174 MHz Receiver Back End Schematic Diagram 6 7 Figure 6 6 VHF 146 174 MHz Synthesizer Schematic Diagram 6 8 Figure 6 7 VHF 146 174 MHz Voltage Controlled Osci...

Page 6: ...ver 8 1 8 2 1 Receiver Front End 8 1 8 2 2 Receiver Back End 8 2 8 3 UHF Transmitter 8 3 8 3 1 Transmitter Power Amplifier 8 3 8 3 2 Antenna Switch 8 3 8 3 3 Harmonic Filter 8 3 8 3 4 Antenna Matching Network 8 4 8 3 5 Power Control 8 4 8 4 UHF Frequency Generation Circuitry 8 4 8 4 1 Fractional N Synthesizer 8 5 8 4 2 Voltage Controlled Oscillator VCO 8 6 8 5 Keypad 8 7 Chapter 9 465 495 MHz UHF ...

Page 7: ...HF 403 440 MHz Audio Circuitry Schematic Diagram 11 13 Figure 11 12 UHF 403 440 MHz DC Regulation Schematic Diagram 11 14 Figure 11 13 UHF 403 440 MHz Keypad Board Schematic Diagram 11 15 Figure 11 14 UHF 403 440 MHz Board Component Side View 11 16 Figure 11 15 UHF 403 440 MHz Board Solder Side View 11 17 Figure 11 16 UHF 403 440 MHz Keypad Board 11 18 UHF 403 440 MHz Radio Parts List 11 19 UHF 40...

Page 8: ...illator Schematic Diagram 11 45 Figure 11 35 UHF 465 495 MHz Transmitter and Power Control Schematic Diagram 11 46 Figure 11 36 UHF 465 495 MHz Controller Interconnect Schematic Diagram 11 47 Figure 11 37 UHF 465 495 MHz Microprocessor Circuitry Schematic Diagram 11 48 Figure 11 38 UHF 465 495 MHz Audio Circuitry Schematic Diagram 11 49 Figure 11 39 UHF 465 495 MHz DC Regulation Schematic Diagram ...

Page 9: ...agram 6 13 Figure 6 12 VHF 146 174 MHz PCB 8486342Z13 C DC Regulation Schematic Diagram 6 14 Figure 6 13 VHF 146 174 MHz Keypad Board Schematic Diagram 6 15 Figure 6 14 VHF 146 174 MHz PCB 8486342Z13 C Board Component Side 6 16 Figure 6 15 VHF 146 174 MHz Board Solder Side View 6 17 Figure 6 16 VHF 146 174 MHz PCB 8486342Z13 C Keypad Board 6 18 Figure 7 1 UHF Receiver Block Diagram 7 1 Figure 7 2 ...

Page 10: ...48Z13 C Controller Interconnect Schematic Diagram 11 30 Figure 11 24 UHF 438 470 MHz Microprocessor Circuitry Schematic Diagram 11 31 Figure 11 25 UHF 438 470 MHz PCB 8486348Z13 C Audio Circuitry Schematic Diagram 11 32 Figure 11 26 UHF 438 470 MHz DC Regulation Schematic Diagram 11 33 Figure 11 27 UHF 438 470 MHz PCB 8486348Z13 C Keypad Option Schematic Diagram 11 34 Figure 11 28 UHF 438 470 MHz ...

Page 11: ...Table 5 2 Troubleshooting Table for Synthesizer 5 3 Table 5 3 Troubleshooting Table for Transmitter 5 4 Table 5 4 Troubleshooting Table for Board and IC Signals 5 7 Table 10 1 Troubleshooting Table for Receiver 10 1 Table 10 2 Troubleshooting Table for Synthesizer 10 3 Table 10 3 Troubleshooting Table for Transmitter 10 4 Table 10 4 Troubleshooting Table for Board and IC Signals 10 6 Related Publi...

Page 12: ...2 segment bar graph with backlit display Digital voltmeter is recom mended 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 measure ments R1377 AC voltmeter 1 mV to 300 mV 10 mega ohm input impedance Audio voltage measurements R1611 Dual channel 100 MHz oscillo scope Agillent Two channel 100 MHz bandwidth 200 M sam...

Page 13: ...o to the other RLN4008 Radio Interface Box Enables communications between the radio and the computer s serial communications adapter 5886564Z01 RF Adaptor Adapts radio s antenna port to BNC cabling of test equipment 0180305K08 Shop Battery Eliminator Interconnects radio to power supply HSN9412 Wall Mounted Power Supply Used to supply power to the RIB 120 VAC 3080369B71 or 3080369B72 Computer Inter...

Page 14: ...Solder RMA type 63 67 0 5mm diameter 1 lb spool 0180303E45 SMD tool kit included with R1319A R1319 ChipMaster 110 V Surface mount removal and assembly of surface mounted integrated circuits and or rework station shields Includes 5 nozzles R1321 ChipMaster 220 V ChipMaster Nozzles 6680332E83 PLCC 28 nozzle Soldering and Un soldering IC s 6680332E82 PLCC 44 nozzle 6680332E94 PLCC 52 nozzle 6680332E9...

Page 15: ...LE CONNECTOR 25 POSITION MALE CONNECTOR 36 0 CABLE 36 0 CABLE P1 P2 P3 P2 25 pin Male D Connector Components molded inside 1 5 24 7 20 8 15 16 9 47 ohm 33K 1UF 16V 5 Orange Blue White Spiral Yellow P1 2 5mm stereo and 3 5mm 1 2 5 3 4 3 5mm Tip Speaker 3 5mm Sleeve 2 5mm Tip Microphone 2 5mm 2 5mm Center P3 25 pin Female D Connector 1 15 4 11 1 2 3 4 5 3 5mm mono 2 5mm stereo To Test Box To Test Bo...

Page 16: ...0 in the TX power control circuit turned on during transmit TX power amplifier module U110 via R150 input pins of regulators U310 U320 and U330 FET switch Q493 turned on whenever the radio is on on off switch S444 part of on off volume control to become SWB SWB Fuse Low Battery Detect Antenna Switch PA Driver PCIC ALC LI Ion 3 3V Reg Audio Power Amplifier ASFIC_CMP VCOBIC FRACTN LCD Driver 5V MECH...

Page 17: ...es Q21 Q22 and the VCO RX injection buffer Q280 Q312 is turned on by Q313 when TX_ENA from U401 pin 50 is high and supplies the 5T source to the first transmitter stage Q100 The digital 3 3 volt source from U320 D_3 3 V is applied to microprocessor U401 EEPROM U402 S RAM U403 flash ROM U404 The 3 V regulated source from U330 is applied to synthesizer IC U201 VCO buffer IC U251 portions of ASFIC U4...

Page 18: ...ious other radio blocks Figure 6 9 show the connections between the following circuit areas which comprise the controller block microprocessor circuitry audio circuitry DC regulation circuitry refer to Chapter 2 DC Regulations and Distribution rotary and pushbutton controls and switches option board interface The majority of the circuitry described below is contained in the VHF Microprocessor Circ...

Page 19: ...3 1 1 2 Control and Indicator Interface Ports PI3 and PI4 are outputs which control the top mounted LED indicator When PI3 is high the indicator is red When PI4 is high the indicator is green When both are high the indicator is amber When both are low the indicator is off Pressing the side mounted PTT button S441 provides a low to port PJ0 U401 pin 71 which indicates PTT is asserted Side mounted o...

Page 20: ...needing DC power applied to the microprocessor 3 1 1 6 Sensing of Externally Connected Accessories Port PJ1 is used to detect the presence of externally connected accessories Port PJ1 U401 pin 72 is normally low unless accessories lapel speaker microphone lightweight headset etc are used with the radio This port is used to detect an accessory PTT or auto sensing of a VOX accessory If VOX is progra...

Page 21: ...flash mode by cycling power to reset the radio Software upgrades can then performed by loading the new software code into Flash ROM U404 3 1 1 9 Microprocessor 7 3975 MHz Clock The 7 3975 MHz clock signal uP_CLK is provided from the ASFIC_CMP U451 pin 28 Upon startup the 16 8MHz crystal provides the signal to the ASFIC_CMP which sends out the uP_CLK at 3 8MHz until a steady state condition is reac...

Page 22: ...dio amp is muted when U451 pin 14 is low When U451 pin 14 is high U490 pin 1 is pulled low by Q490 enabling the audio amplifier Because the power amplifier is a bridge type neither speaker terminal is grounded Care should be taken that any test equipment used to measure the speaker audio voltage does not ground either speaker output terminal otherwise damage to the audio power amplifier IC may res...

Page 23: ...on the 2 5 mm microphone jack is used for reading programming or re flashing the radio using CPS This contact J471 pin 6 is routed to ports PD0_RXD data into uP pin 97 and PD1_TXD data out of uP pin 98 Transistor Q410 isolates the input and output functions by allowing PD1 to pull the line low but does not affect incoming data from being read by port PD0 To re flash the radio overwrite the softwar...

Page 24: ...ts of a preselector filter RF amplifier an interstage filter and a double balanced first mixer The preselector filter is a fixed tuned 4 pole design using discrete elements L1 L4 and C1 C9 in a series shunt resonator configuration It has a 3 dB bandwidth of 44 MHz an insertion loss of 2 dB and image attenuation of 40 dB at 235 MHz with increasing attenuation at higher frequencies Diode CR1 protect...

Page 25: ...44 85 MHz crystal filter with a minimum 3 dB bandwidth of 6 7 kHz a maximum 20 dB bandwidth of 12 5 kHz and a maximum insertion loss of 3 5 dB The output is matched to IF amplifier stage Q51 by L53 and C93 Q51 provides 16 dB of gain and a noise figure of 1 8 dB The dc operating current is 1 mA The output of Q51 is applied to the input of the receiver IFIC U51 Diode CR51 limits the maximum RF level...

Page 26: ...h consists of two pin diodes D120 and D121 In the receive mode both diodes are off Signals applied at the antenna or at jack J140 are routed via the harmonic filter through network C122 C124 and L121 to the receiver input In the transmit mode Q170 is on and TXB is present forward biasing both diodes into conduction The diode current is 50 mA set by R120 R122 The transmitter RF from U110 is routed ...

Page 27: ... and R111 and applied as a gate voltage to the power amplifier U110 By varying this gate voltage as needed to keep the voltages at U150 pins 2 and 3 equal power is maintained at the desired setting Excessive final current for example due to antenna mismatch causes a lowering of the voltage at U150 pin 6 an increased voltage at pin 2 and a lowering of the voltage at pin 1 and of the gate voltage VG...

Page 28: ...ned to the crystal that identifies its temperature characteristics Stability is better than 2 5 ppm over temperatures of 30 to 60 C Software programmable electronic frequency adjustment is achieved by an internal DAC which provides a frequency adjustment voltage from U201 pin 25 to varactor D201 The synthesizer IC U201 further divides the 16 8 MHz signal to 2 1 MHz 2 225 MHz or 2 4 MHz for use as ...

Page 29: ...ne U251 pin 19 is low This activates the receive VCO and the receive buffer of U251 which operate within the range of 190 85 to 218 85 MHz The VCO frequency is determined by tank inductor L254 C253 C257 and varactor D251 The buffered RF signal at U251 pin 8 is further amplified by Q280 and applied as RX_INJ to the low pass injection filter in the receiver front end circuit In the transmit mode U25...

Page 30: ... each key press Figure 4 6 Keypad Block Diagram Presc RX TX Matching Network Pin 8 Pin 14 Pin 10 3V U330 Pin 5 VCC Buffers U201 Pin 32 AUX3 U201 Pin 2 Prescaler Out Pin 12 Pin 19 Pin 20 TX RX BS Switching Network U251 VCOBIC Rx Active Bias Tx Active Bias Pin 2 Rx I adjust Pin 1 Tx I adjust Pins 9 11 17 Pin 18 Vsens Circuit Pin 15 Pin 16 TX VCO Circuit TX Tank RX VCO Circuit RX Tank Pin 7 Vcc Super...

Page 31: ...November 24 2003 HKLN4216A 4 8 VHF Theory Of Operation Keypad Notes ...

Page 32: ...ery voltage present at S444 pin 5 when radio is on Verify Q494 1 is at least 1 V dc Q494 6 is 0 1 V dc Q493 3 is at Vbatt Check replace on off volume control S444 Troubleshoot replace Q493 4 5 Microprocessor not starting up Verify clock input to U401 90 EXTAL is 7 3975 MHz using high impedance probe If clock is 3 8 MHz check for shorts on U401 pins Connect RIB to verify communica tion via CPS Veri...

Page 33: ...F level at T42 6 is approx 6 dBm Check that RF level at U251 8 is at least 8 dBm Check injection filter C40 44 L40 41 If yes check Q280 and associ ated parts If no check U251 and components on pins 5 and 6 2 No 5R source Verify U401 49 is high in RX Verify Q311 gate is 0 V dc in RX Verify Q311 drain is 5 V dc in RX Check replace U401 Check replace Q313 Check for shorts check replace Q311 3 Harmoni...

Page 34: ...es at U251 pins 1 3 4 10 15 16 per Table 5 4 Verify steering line voltage is between 3 V and 10 V Check VCO tank components connected to U251 15 and 16 Check for shorts opens replace U251 Check D261 and associated components 2 Synthesizer fault Verify TRB line U201 2 to U251 19 is high 3 V in TX mode Check for shorts check U201 voltages per Table 5 4 replace U201 if incorrect 3 Programming fault V...

Page 35: ... U401 50 is high when pin 71 or 72 is low Check replace U401 3 TX DC switch fault Verify Q171 C is 0 V in TX Verify Q170 C is at Vbatt in TX Replace Q171 Check for shorts replace Q170 4 Power control fault Check Q150 and U150 dc voltages per schematic and Table 5 4 Repair replace defective com ponents 5 No TX injection Check that RF level at jct R100 R101 per schematic Check U251 L291 292 C290 291...

Page 36: ... may occur Check replace D120 121 L120 121 R120 122 etc 5 Harmonic filter defect Visually inspect components C130 137 L130 132 Check dc continuity of L130 132 in RX mode only Repair replace if necessary Poor TX range conducted power OK 1 RF test jack defective Verify continuity of J140 pins 3 and 4 in RX mode only Replace J140 2 Antenna matching net work fault Visually inspect components C140 141 ...

Page 37: ...n speaking into mic Check Q470 R475 R477 L471 Check VR473 VR475 D470 for shorts 2 Audio path fault Verify mic audio present 10 mV rms at U451 46 Verify amplified mic audio present 200 mV rms at U451 40 Check L471 C470 Check replace U451 3 Defective audio acces sory Try another accessory Replace defective accessory Table 5 3 Troubleshooting Table for Transmitter Continued Symptom Possible Causes Pr...

Page 38: ...l 6 Vcc 4 70 7 Audio feedback 0 89 8 Audio output 1 44 DEMOD to stage U510 9 RSSI feedback 0 74 no received signal 10 Quad detector input 2 22 11 Limiter output 1 25 12 Limiter decoupling 2 1 30 13 Limiter decoupling 1 1 30 14 Limiter input 1 28 15 Ground GND 16 IF amp output 1 22 17 IF amp decoupling 2 1 26 18 IF amp input 1 26 19 IF amp decoupling 1 1 26 20 2nd mixer output 3 09 U52 BW Select Sw...

Page 39: ...p TX mode 8 Vcc 6 79 TX mode U201 Freq Synthesizer 1 AUX2 output NU 0 2 AUX3 output TRB 0 03 To U251 19 RX mode 3 AUX4 output NU 0 4 Lock detect output 2 98 To U401 56 5 PD Vdd 2 98 6 Digital ground GND 7 Serial data input 3 23 8 Serial clock input 0 9 Synth chip select 3 23 From U401 47 10 Modulation input 1 50 From U451 40 11 VMULT4 NU 2 98 12 VMULT3 NU 0 13 VRO 4 96 14 VMULT2 1 49 15 VMULT1 1 4...

Page 40: ...3 20 V in TX mode 41 Modulation output 3 42 typ 1 62 V typ in TX mode 42 CCOMP NU 0 05 43 Steering line IOUT 9 62 typ Depends on frequency 44 PD ground GND 45 Steering line IADAPT 9 62 typ Depends on frequency 46 Adapt switch NU 0 47 Voltage from charge pump 12 8 48 AUX1 output NU 2 98 U251 VCO Buffer 1 TX VCO current adjust 4 50 2 RX VCO current adjust 4 35 3 Superfiltered input 4 51 4 Collector ...

Page 41: ...pacitor 1 26 5 Vout 4 96 U320 3 3 V Regulator 1 Ground GND 2 Feedback 1 23 3 Tap NU 0 4 Vin 7 48 5 Vout 3 23 6 Sense NU 0 7 Error reset output 3 20 8 Shutdown input 7 48 U330 3 V Regulator 1 Vin 7 48 2 Ground GND 3 Control input 7 48 4 Bypass capacitor 1 26 5 Vout 3 00 U401 Microprocessor 1 PD4_SCK serial clock input 0 2 PD5_SS 3 23 ASFIC chip select 3 PD6_VLIN 3 23 EEPROM chip select 4 PG7_R_W 3 ...

Page 42: ... 23 PF6_ADDR6 3 08 24 PF5_ADDR5 3 06 25 PF4_ADDR4 0 16 26 PF3_ADDR3 0 26 27 PF2_ADDR2 3 06 28 PF1_ADDR1 3 06 29 PFO_ADDR0 3 05 30 PC0_DATA0 0 69 31 PC1_DATA1 0 96 32 PC2_DATA2 1 10 33 PC3_DATA3 0 81 34 PC4_DATA4 0 62 35 PC5_DATA5 0 68 36 PC6_DATA6 0 67 37 PC7_DATA7 0 73 38 PH7_CSPROG 3 05 39 VDDL 3 23 40 VSSL GND 41 PH6_CSGP2 3 23 42 PH5_CSGP1 3 23 43 PH4_CSIO 0 44 PH3_PW4 3 21 On off control outp...

Page 43: ...12 59 AVDD 3 23 60 PE7_AN7 3 20 61 PE6_AN6 3 20 62 PE5_AN5 2 91 VOX threshold detect 63 PE4_AN4 0 73 RSSI input 64 PE3_AN3 0 14 65 PE2_AN2 1 62 66 PE1_AN1 0 3 3 V Volume control wiper 67 PE0_AN0 2 48 33 of battery voltage 68 VRL 0 69 VRH 3 20 70 AVSS GND 71 PJ0_CSGP3 3 23 Side PTT button 72 PJ1_CSGP4 0 External MIC PTT 73 PJ2 3 23 74 PJ3 3 23 75 PJ4 3 23 76 PJ5 0 77 PJ6 3 23 Bottom option button 7...

Page 44: ...ot used 92 VDDSYN 0 93 XFC NU 0 94 RESET 3 20 From U320 95 LVOUT 0 96 IRQ 3 20 97 PD0_RXD 3 23 98 PD1_TXD 1 9 99 PD2_MISO 0 100 PD3_MOSI 3 23 U402 EEPROM 1 Chip select 3 23 From U401 3 2 Serial data out 0 3 Write protect 3 23 4 Vss GND 5 Serial data in 3 23 6 Serial clock 0 7 Hold 3 23 8 Vcc 3 23 U404 Flash ROM 1 A11 3 06 2 A9 3 08 3 A8 3 05 4 A13 0 13 5 A14 0 31 6 NC 3 17 7 EN_WE 3 21 From U401 4...

Page 45: ...om U401 38 31 A10 0 16 32 EN_OE 0 From U401 86 U451 ASFIC_CMP 1 VDD for analog circuits 3 00 2 DISC audio input 1 34 From U510 3 Ground for analog circuits GND 4 DACU output 0 5 DACR output 0 6 DACG output 2 38 typ Power set TX mode 7 VOX peak detector output 2 91 8 PLCAP for DC integrator 0 40 9 SQIN 0 01 10 Universal audio input output 0 11 VDD for DACs 4 95 12 SQCAP 0 13 GCB2 general purpose ou...

Page 46: ...ut 1 70 29 1200 Hz ref for MDC decode 3 00 30 GNDDO GND 31 Ground for digital circuits GND 32 Vdd for analog switches 4 96 33 Vdd for digital circuits 3 00 34 16 8 MHz master clock input 1 54 35 GCB3 general purpose output 3 00 Internal MIC enable 36 TX audio return from option 0 37 GCB4 general purpose output 0 38 GCB5 general purpose output 0 39 RX audio send to option 1 48 40 Modulation output ...

Page 47: ...9 Unsquelched U510 Dual Opamp 1 Unit 1 output 1 75 2 Unit 1 input 1 56 3 Unit 1 input 1 55 4 Ground GND 5 Unit 2 input 1 55 6 Unit 2 input 1 56 7 Unit 2 output 1 38 8 Vcc 4 96 1 All voltages are measured with a high impedance digital voltmeter and expressed in volts DC relative to ground 0 V 2 Voltages are measured with a DC input voltage of 7 50 02 volts DC applied to the battery connector J301 3...

Page 48: ...ont 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 corres...

Page 49: ...d filter BW select from ASFIC RSSI RX signal strength indication from IFIC to uP IF_IN OUT 44 85 MHz from 1st mixer to high IF filter RF_IN OUT RX signal from antenna switch to front end MOD OUT IN TX modulation from ASFIC to synthesizer 16_8_MHZ Ref osc signal from synthesizer to ASFIC SYNTH_CS Synthesizer chip select from uP SPI_CLK Serial clock from uP SPI_DATA_OUT Serial data from uP LOCK Lock...

Page 50: ...aker and Microphone Schematic Figure 6 2 Speaker and Microphone Schematic 6 2 1 Speaker and Microphone Parts List Reference Designator Motorola Part No Description MK1 5085880L01 Microphone 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 SP1 1 2 1 2 MATES WITH J470 ON RADIO BOARD MATES WITH J49...

Page 51: ...November 24 2003 HKLN4216A Notes 6 4 VHF Schematic Diagrams Overlays and Parts Lists Speaker and Microphone Schematic ...

Page 52: ..._VHF_R2 V_SF V_STEER VHF R2 5V 3V 5R 16_8_MHZ 3V 5V LOCK MOD_IN PRESC SPI_CLK SPI_DATA_OUT SYNTH_CS TRB VCO_MOD RSSI 5V 5R 3V 5R USWB 5V USWB V_SF V_STEER 5T 3V 5T PWR_SET RX_OUT TX_ENA TX_INJ USWB 5V BW_SEL DEMOD IF_IN LOCK MOD_OUT PWR_SET RSSI SPI_CLK SPI_DATA_OUT SYNTH_CS TX_ENA USWB 3V 5R PRESC RX_INJ TRB TX_INJ VCO_MOD 5R IF_OUT RX_IN RX_INJ 5T 16_8_MHZ 3V 5R 5T 5V BW_SEL DEMOD Figure 6 3 VHF...

Page 53: ...IF_OUT Q21 BFS540 1 1K R40 36pF 1 C42 NU C9 82pF C51 L32 2 68nH 3 2 1 NC L41 2 68nH RF BALUN T41 NC 5 4 6 1000pF C23 C40 1 20pF 27pF C35 1 L3 68nH 2 15pF 1 C41 FE_RF_INJ R26 0 20pF 1 C44 C25 1000pF 2 68nH L2 NU C32 1 56pF C24 51 R51 30pF 1 C8 NC 1 33pF C7 1 IO1 IO2 2 3 IO3 4 IO4 TP2 1 HSMS2829 CR41 C36 1 24pF 2 68nH L33 15pF 1000pF C22 1 1 C4 1 C3 47pF C31 1 SHIELD SH40 TP1 1 30pF SHIELD SH1 1 22K...

Page 54: ...R57 C66 SH52 SHIELD 1 OUT IN 1 0 1uF 44 395MHz TSS2_44_395MHZ Y51 2 GND 4 GND1 3 2 CC1 5 CC2 1 GND1 4 GND2 3 IN 6 OUT 44 85MHz MXF45 FL51 4 VCC 8 C58 3 9pF PWR_GND U52 4 GND R81 10uF C91 0 1uF C65 1K R75 12K 20K C57 0 1uF 9180468V04 3 GND IN 1 OU T 2 R64 FLTR FL52 C81 1 33pF C70 IF_IN RFIN RFIN_DEC 2 5 RSSIOUT RSSI_FEED 9 6 VCC 130pF LIMIN LIMOUT 11 13 LIM_DEC1 12 LIM_DEC2 20 MIXOUT OSCIN 4 3 OSCO...

Page 55: ...nH 150 R221 C219 0 1uF C207 470pF C232 0 1uF 150K NC C209 R202 C245 470pF C225 1uF C224 NC 10uF 01uF C213 C223 01uF 1 01uF 470pF TP240 C208 R205 100 470pF C204 220pF C201 22pF C220 NC NC R245 C222 01uF FN_16_8 1 5K 1000pF C217 150K R227 2 7pF 3 7 C203 1000pF C214 R244 51 FN_SYNTH_CS C228 0 1uF C205 R212 0 NU FN_3V NC NC NC R223 100 FN_CLK A2 5 A3 4 K1 1 K2 2 K3 3 D221 A1 6 01uF NC FN_VCO_MOD C221 ...

Page 56: ... R280 1 16pF 51pF C253 47nH 2 L264 C290 Q280 BFS540 1 3 2 30 L262 R263 0 1uF C272 560nH TX_OUT 13 TX_SWITCH 14 VCC_BUFFERS 18 VCC_LOGI C D251 RX_IADJ 8 RX_OUT 7 RX_SWITCH 3 SUPER_FLTR TRB_IN 19 16 TX_BASE 15 TX_EMITTER 1 TX_IADJ 10 COLL_RFIN 20 FLIP_IN 11 GND_BUFFERS 9 GND_FLAG GND_LOGIC 17 12 PRESC_OUT 5 RX_BASE 6 RX_EMITTER 2 U251 50 U5 4 4 C269 1500pF 36pF 1 C267 C283 1200pF V_SF C284 1200pF R2...

Page 57: ...7nH L131 1500pF PA_TX_IN J C103 C137 200pF C122 15pF 6 5 7 8 4 L120 560nH U150 2 LM2904 18pF C123 15pF C141 NU C104 T2 330 R156 J140 G1 G2 S1 S2 T1 1500pF C120 0 1uF C170 C121 1500pF R103 3 3K 5 2 3 6 4 1 C111 NU EMB10 Q170 57R01 U151 PA_TX_EN A C114 1500pF C130 12pF C159 1500pF L121 47nH PA_PWR_SET D121 MA4PH261 2 C109 0 1uF Q150 1 3 13pF C140 1000pF C117 100K 1 R153 C115 1uF 150 R120 C110 0 1uF ...

Page 58: ... RX_ENA SWB TX_ENA USWB VOLUME 14 C407 1000pF CNTL_SYNTH_CS 3 A2 2 B1 4 B2 CNTL_SPI_CLK SWITCH S443 1 A1 C403 150p F 32 1000pF C40 2 5R CNTL_LOCK R505 100 1 A1 3 A2 2 B1 4 B2 CNTL_RSSI 3V SWITCH S441 8 24 6 29 28 27 C406 150pF C409 1000pF 150pF C405 5V C404 1000pF CNTL_SPI_DATA_OUT CNTL_5R 31 30 5V R503 13 100 21 18 19 TP404 15 16 1000pF 23 10 C500 CNTL_BW_SEL 1 A1 3 A2 B1 2 4 B2 USWB 5V SYNTH_CS ...

Page 59: ...414 33K D414 NC R430 100K 0 R432 01uF C420 C412 1000pF D3_3V NC SH400 SHIELD 1 10uF 100K 1 R425 C410 0 1uF D3_3 V C432 R441 4 7K 4 7K R440 100K R418 C400 NU R400 NU 1000pF C417 D3_3V C433 1000pF C443 01uF SH401 SHIELD 1 SW_B NC 0 1uF C418 R416 20K Q440 2 2 4 3 R422 SW_B 1 3 2 NC 100K Q402 100K 1 R421 200K 1 R420 120 R443 01uF C445 C446 100K 01uF R423 BRPY1204W D440 01uF C421 4 7K R445 0 1uF R446 C...

Page 60: ...M2904 U510 1 0 R487 0 1uF Not_Placed NU C481 01uF NC NU R521 C482 Not Placed NU C463 0 1uF 01uF C480 0 1uF R520 100K U480 2 LM2904 6 5 7 8 4 5V_A 6 3 5V Not_Placed NU 5V_B Q470 10K R496 Not_Placed NU R480 0 BK1005HM471 E451 NC 100K R476 100K R486 5V_A Not_Placed NU 330K R488 Not_Placed NU R489 91K 0 1uF C472 680 R473 C492 10uF R460 24K IMX1 Q520 5 1 6 C484 033uF Not_Placed NU R479 100K R464 30K VR...

Page 61: ...00pF 100K NC SHUTDOW N 8 TAP 3 R509 ERROR 7 FEEDBACK 2 GND 1 INPUT 4 OUTPUT 5 SENSE 6 C305 100pF LP2986 U320 C331 01uF 330K 1 R320 10uF 1200pF C321 R313 C315 R312 10K HIGH TAB1 6 TAB2 7 2 NC 20K S444 SWITCH 4 1 LOW 5 3 100K R508 01uF C322 C303 33uF Q494 2 6 4 1 3 018uF C320 Q313 01uF D3_3V C306 Q312 01uF C310 R510 330K D3_3V 018uF C311 NC TP302 1 R321 1 200K C314 1200pF D3_3V 20V MMBZ5250B VR301 N...

Page 62: ... J2 23 23 R3 J2 20 20 J1 3 3 J2 11 11 J2 1 1 QSMG H799 D6 J2 2 2 J2 22 22 D3 QSMG H799 J1 7 7 J1 2 2 J2 25 25 J2 26 26 D7 QSMG H799 C7 150pF DNF 0 1uF C4 R13 330 470 R12 22K R8 R9 J2 24 24 NC NC 43K J2 4 4 J2 6 6 5 J1 4 4 470 J1 5 NC NC R11 QSMG H799 D11 1 2 3 D10 QSMG H799 1 2 3 SWITCH S32 1 2 3 SWITCH S31 SWITCH S29 1 2 3 SWITCH S30 3 SWITCH S28 1 2 3 2 3 SWITCH S27 1 2 1 2 3 SWITCH S26 1 1 2 3 ...

Page 63: ...R1 D251 D261 D262 D301 D424 D470 D471 E452 E500 F301 4 3 2 FL53 4 3 2 FL54 J140 3 2 J301 J470 6 4 7 5 2 3 J471 L1 L2 L3 L4 L21 L22 L31 L32 L33 L211 L251 L252 L253 L254 L255 L262 L263 L264 L265 L281 L283 L471 M140 Q21 Q171 Q280 Q402 Q403 Q440 Q472 R22 R24 R25 R26 R61 R63 R171 R205 R212 R220 R221 R223 R230 R243 R244 R245 R247 R248 R253 R254 R261 R262 R263 R264 R280 R281 R282 R283 R286 R400 R410 R414...

Page 64: ... 28 2 29 30 32 31 J460 2 J491 L40 L41 L51 L52 L53 L54 L81 L100 L101 L102 L103 L110 L120 L121 L130 L131 L132 L140 L270 L271 L276 L282 L291 L292 Q22 Q51 Q70 Q100 Q150 1 6 3 4 Q170 Q311 Q312 4 3 Q313 4 3 Q410 Q470 4 3 Q471 Q481 Q482 4 3 Q490 Q493 4 3 Q494 Q520 R20 R21 R23 R40 R51 R52 R53 R54 R55 R57 R60 R62 R64 R65 R66 R67 R72 R73 R74 R75 R76 R77 R78 R80 R81 R82 R90 R91 R100 R101 R102 R103 R104 R105 ...

Page 65: ...s Lists November 24 2003 HKLN4216A D1 D2 D3 D4 D5 D6 D7 D8 D9 D10 D11 C1 C2 C3 C4 C5 C6 C7 C8 G1 G2 9 J1 28 1 g1 g2 J2 R1 R2 R3 R4 R5 R6 R7 R8 R9 R10 R11 R12 R13 R14 R15 Component Side Solder Side Figure 6 16 VHF 146 174 MHz PCB 8486342Z13 C Keypad Board ...

Page 66: ...6 2113743L41 CAP 01uF C157 2113743M24 CAP 0 1uF C158 2113743L21 CAP 1500pF Circuit Ref Motorola Part No Description C159 2113743L21 CAP 1500pF C170 2113743L21 CAP 1500pF C171 2113743N12 CAP 2 7pF C172 2113743L21 CAP 1500pF C201 2113740F59 CAP 220pF C202 2109445U52 CAP 62pF C203 2109445U13 CAP 2 7pF C204 2113743L09 CAP 470pF C205 Not_Placed CAP 2 7pF C206 Not_Placed CAP 1000pF C207 2113743L09 CAP 4...

Page 67: ...18 RB520S 30 D471 4809924D18 RB520S 30 D491 4805129M41 MMBD501 E451 2480640Z01 BK1005HM471 E452 2480640Z01 BK1005HM471 E453 2480640Z01 BK1005HM471 Circuit Ref Motorola Part No Description E500 2480640Z01 BK1005HM471 F301 6580542Z01 FUSE FL51 9180022M11 MXF45 FL52 9180468V05 FLTR FL53 9180469V05 CFWC455E FL54 9180469V03 CFWC455G J140 0986428Z01 CONN_J J301 0986237A02 CONN_J J460 Not_Placed CONN_J J...

Page 68: ...057N23 RES 100K R431 Not_Placed RES 100K R432 0662057M01 RES 0 R433 0662057N23 RES 100K R434 Not_Placed RES 100K Circuit Ref Motorola Part No Description R440 0662057M90 RES 4 7K R441 0662057M90 RES 4 7K R442 0662057A33 RES 220 R443 0662057A27 RES 120 R445 0662057M90 RES 4 7K R446 0662057M98 RES 10K R451 0662057N15 RES 47K R460 0662057N08 RES 24K R462 0662057N08 RES 24K R463 0662057N08 RES 24K R46...

Page 69: ...AP 150pF C6 NOTPLACED CAP 150pF C7 NOTPLACED CAP 150pF C8 NOTPLACED CAP 150pF D1 4809496B11 QSMG H799 D2 4809496B11 QSMG H799 D3 NOTPLACED QSMG H799 D4 NOTPLACED QSMG H799 D5 NOTPLACED QSMG H799 D6 NOTPLACED QSMG H799 D7 NOTPLACED QSMG H799 D8 NOTPLACED QSMG H799 D9 4809496B11 QSMG H799 D10 4809496B11 QSMG H799 D11 4809496B11 QSMG H799 J1 09_54548_091 1_9pin CONN_J J2 09_52892_289 0_28PIN CONN_J R...

Page 70: ...crete elements L1 L3 C1 C10 C12 and C523 in a shunt resonator configuration It has a 3 dB bandwidth of 68 MHz centered at 421 MHz an insertion loss of 2 2 dB and image attenuation of 38 dB at 350 MHz Diode CR1 protects the RF amplifier by limiting excessive RF levels The filter bandwidth is considerably wider than the receive band to achieve low insertion loss in a compact size C523 provides a tra...

Page 71: ...applied to the input of the receiver IFIC U51 Diode CR51 limits the maximum RF level applied to the IFIC The IFIC is a low voltage monolithic FM IF system incorporating a mixer oscillator two limiting IF amplifiers quadrature detector logarithmic received signal strength indicator RSSI voltage regulator and audio and RSSI op amps The second LO frequency 44 395 MHz is determined by Y51 The second m...

Page 72: ... The antenna switch consists of two pin diodes D120 and D121 In the receive mode both diodes are off Signals applied at the antenna or at jack J140 are routed via the harmonic filter through network C122 C124 and L121 to the receiver input In the transmit mode Q170 is on and TXB is present forward biasing both diodes into conduction The diode current is 20 mA set by R120 R121 The transmitter RF fr...

Page 73: ...ared to the power set voltage PWR_SET at pin 3 The output of U150 pin 1 is divided by R110 and R111 and applied as a gate voltage to the power amplifier U110 By varying this gate voltage as needed to keep the voltages at U150 pins 2 and 3 equal power is maintained at the desired setting Excessive final current for example due to antenna mismatch causes a lowering of the voltage at U150 pin 6 an in...

Page 74: ...ion algorithm within U201 and is specific to each crystal Y201 based on a unique code assigned to the crystal that identifies its temperature characteristics Stability is better than 2 5 ppm over temperatures of 30 to 60 C Software programmable electronic frequency adjustment is achieved by an internal DAC which provides a frequency adjustment voltage from U201 pin 25 to varactor D201 The synthesi...

Page 75: ... TRB line U251 pin 19 is low This activates the receive VCO and the receive buffer of U251 which operate within the range of 358 15 to 395 15 MHz The VCO frequency is determined by tank inductor L254 C253 C257 and varactor D251 The buffered RF signal at U251 pin 8 is further amplified by Q280 and applied as RX_INJ to the low pass injection filter in the receiver front end circuit In the transmit m...

Page 76: ...OL for each key press Figure 7 6 Keypad Block Diagram Presc RX TX Matching Network Pin 8 Pin 14 Pin 10 3V U330 Pin 5 VCC Buffers U201 Pin 32 AUX3 U201 Pin 2 Prescaler Out Pin 12 Pin 19 Pin 20 TX RX BS Switching Network U251 VCOBIC Rx Active Bias Tx Active Bias Pin 2 Rx I adjust Pin 1 Tx I adjust Pins 9 11 17 Pin 18 Vsens Circuit Pin 15 Pin 16 TX VCO Circuit TX Tank RX VCO Circuit RX Tank Pin 7 Vcc...

Page 77: ...November 24 2003 HKLN4216A Notes 7 8 403 440 MHz UHF Theory Of Operation Keypad ...

Page 78: ...screte elements L1 L3 C1 C10 C12 and C523 in a shunt resonator configuration It has a 3 dB bandwidth of 68 MHz centered at 460 MHz an insertion loss of 2 dB and image attenuation of 35 dB at 380 MHz Diode CR1 protects the RF amplifier by limiting excessive RF levels The filter bandwidth is considerably wider than the receive band to achieve low insertion loss in a compact size C523 provides a tran...

Page 79: ...lied to the input of the receiver IFIC U51 Diode CR51 limits the maximum RF level applied to the IFIC The IFIC is a low voltage monolithic FM IF system incorporating a mixer oscillator two limiting IF amplifiers quadrature detector logarithmic received signal strength indicator RSSI voltage regulator and audio and RSSI op amps The second LO frequency 44 395 MHz is determined by Y51 The second mixe...

Page 80: ...switch consists of two pin diodes D120 and D121 In the receive mode both diodes are off Signals applied at the antenna or at jack J140 are routed via the harmonic filter through network C122 C124 and L121 to the receiver input In the transmit mode Q170 is on and TXB is present forward biasing both diodes into conduction The diode current is 20 mA set by R120 R121 The transmitter RF from U110 is ro...

Page 81: ...ared to the power set voltage PWR_SET at pin 3 The output of U150 pin 1 is divided by R110 and R111 and applied as a gate voltage to the power amplifier U110 By varying this gate voltage as needed to keep the voltages at U150 pins 2 and 3 equal power is maintained at the desired setting Excessive final current for example due to antenna mismatch causes a lowering of the voltage at U150 pin 6 an in...

Page 82: ...ion algorithm within U201 and is specific to each crystal Y201 based on a unique code assigned to the crystal that identifies its temperature characteristics Stability is better than 2 5 ppm over temperatures of 30 to 60 C Software programmable electronic frequency adjustment is achieved by an internal DAC which provides a frequency adjustment voltage from U201 pin 25 to varactor D201 The synthesi...

Page 83: ... TRB line U251 pin 19 is low This activates the receive VCO and the receive buffer of U251 which operate within the range of 393 15 to 425 15 MHz The VCO frequency is determined by tank inductor L254 C253 C257 and varactor D251 The buffered RF signal at U251 pin 8 is further amplified by Q280 and applied as RX_INJ to the low pass injection filter in the receiver front end circuit In the transmit m...

Page 84: ...OL for each key press Figure 8 6 Keypad Block Diagram Presc RX TX Matching Network Pin 8 Pin 14 Pin 10 3V U330 Pin 5 VCC Buffers U201 Pin 32 AUX3 U201 Pin 2 Prescaler Out Pin 12 Pin 19 Pin 20 TX RX BS Switching Network U251 VCOBIC Rx Active Bias Tx Active Bias Pin 2 Rx I adjust Pin 1 Tx I adjust Pins 9 11 17 Pin 18 Vsens Circuit Pin 15 Pin 16 TX VCO Circuit TX Tank RX VCO Circuit RX Tank Pin 7 Vcc...

Page 85: ...November 24 2003 HKLN4216A Notes 8 8 438 470 MHz UHF Theory Of Operation Keypad ...

Page 86: ...rete elements L1 L3 C1 C10 C12 and C523 in a shunt resonator configuration It has a 3 dB bandwidth of 68 MHz centered at 480 MHz an insertion loss of 2 dB and image attenuation of 39 dB at 405 3 MHz Diode CR1 protects the RF amplifier by limiting excessive RF levels The filter bandwidth is considerably wider than the receive band to achieve low insertion loss in a compact size C523 provides a tran...

Page 87: ...applied to the input of the receiver IFIC U51 Diode CR51 limits the maximum RF level applied to the IFIC The IFIC is a low voltage monolithic FM IF system incorporating a mixer oscillator two limiting IF amplifiers quadrature detector logarithmic received signal strength indicator RSSI voltage regulator and audio and RSSI op amps The second LO frequency 44 395 MHz is determined by Y51 The second m...

Page 88: ...tch The antenna switch consists of two pin diodes D120 and D121 In the receive mode both diodes are off Signals applied at the antenna or at jack J140 are routed via the harmonic filter through network C122 C124 and L121 to the receiver input In the transmit mode Q170 is on and TXB is present forward biasing both diodes into conduction The diode current is 20 mA set by R120 R121 The transmitter RF...

Page 89: ...ared to the power set voltage PWR_SET at pin 3 The output of U150 pin 1 is divided by R110 and R111 and applied as a gate voltage to the power amplifier U110 By varying this gate voltage as needed to keep the voltages at U150 pins 2 and 3 equal power is maintained at the desired setting Excessive final current for example due to antenna mismatch causes a lowering of the voltage at U150 pin 6 an in...

Page 90: ...ion algorithm within U201 and is specific to each crystal Y201 based on a unique code assigned to the crystal that identifies its temperature characteristics Stability is better than 2 5 ppm over temperatures of 30 to 60 C Software programmable electronic frequency adjustment is achieved by an internal DAC which provides a frequency adjustment voltage from U201 pin 25 to varactor D201 The synthesi...

Page 91: ... TRB line U251 pin 19 is low This activates the receive VCO and the receive buffer of U251 which operate within the range of 420 15 to 450 15 MHz The VCO frequency is determined by tank inductor L254 C253 C257 and varactor D251 The buffered RF signal at U251 pin 8 is further amplified by Q280 and applied as RX_INJ to the low pass injection filter in the receiver front end circuit In the transmit m...

Page 92: ...OL for each key press Figure 9 6 Keypad Block Diagram Presc RX TX Matching Network Pin 8 Pin 14 Pin 10 3V U330 Pin 5 VCC Buffers U201 Pin 32 AUX3 U201 Pin 2 Prescaler Out Pin 12 Pin 19 Pin 20 TX RX BS Switching Network U251 VCOBIC Rx Active Bias Tx Active Bias Pin 2 Rx I adjust Pin 1 Tx I adjust Pins 9 11 17 Pin 18 Vsens Circuit Pin 15 Pin 16 TX VCO Circuit TX Tank RX VCO Circuit RX Tank Pin 7 Vcc...

Page 93: ...November 24 2003 HKLN4216A Notes 9 8 465 495 MHz UHF Theory Of Operation Keypad ...

Page 94: ...battery voltage present at S444 pin 5 when radio is on Verify Q494 1 is at least 1V dc Q494 6 is 0 1V dc Q493 3 is at Vbatt Check replace on off volume control S444 Troubleshoot replace Q493 4 5 Microprocessor not starting up Verify clock input to U401 90 EXTAL is 7 3975 MHz using high impedance probe If clock is 3 8MHz check for shorts on U401 pins Con nect RIB to verify communication via CPS Ver...

Page 95: ...F level at T42 6 is approx 6 dBm Check that RF level at U251 8 is at least 8 dBm Check injection filter C40 44 L40 41 If yes check Q280 and associ ated parts If no check U251 and components on pins 5 and 6 2 No 5R source Verify U401 49 is high in RX Verify Q311 gate is 0V dc in RX Verify Q311 drain is 5V dc in RX Check replace U401 Check replace Q313 Check for shorts check replace Q311 3 Harmonic ...

Page 96: ...oltages at U251 pins 1 3 4 10 15 16 per Table 10 4 Verify steering line voltage is between 3V and 10V Check VCO tank components connected to U251 15 and 16 Check for shorts opens replace U251 Check D261 and associated components 2 Synthesizer fault Verify TRB line U201 2 to U251 19 is high 3V in TX mode Check for shorts check U201 voltages per Table 10 4 replace U201 if incorrect 3 Programming fau...

Page 97: ...7 TX gain stage failure Check RF levels at Q100 and U110 per schematic Troubleshoot Q100 U110 and associated circuitry 8 Antenna switch failure Verify dc voltage at jct R122 L120 is approx 1 5V Check replace D120 121 L120 121 R120 122 etc Low Power 1 Low TX injection Check that RF level at jct R100 R101 per schematic Check U251 L291 292 C290 291 2 Low gain in TX stage Verify dc voltage at Q100 E i...

Page 98: ...U451 Check replace R474 R476 and Q470 2 Defective mic Verify approx 1 8V dc across car tridge when side PTT button is pressed Verify audio present 10 mV rms when speaking into mic Check mic connector and R478 Replace mic cartridge 3 Defective mic jack Verify continuity between J471 pins 4 and 5 Replace J471 No EXT MIC audio 1 Mic bias fault Verify approx 1 8V dc across EXT MIC cartridge in TX mode...

Page 99: ...nal 6 Vcc 4 70 7 Audio feedback 0 89 8 Audio output 1 44 DEMOD to stage U510 9 RSSI feedback 0 74 no received signal 10 Quad detector input 2 22 11 Limiter output 1 25 12 Limiter decoupling 2 1 30 13 Limiter decoupling 1 1 30 14 Limiter input 1 28 15 Ground GND 16 IF amp output 1 22 17 IF amp decoupling 2 1 26 18 IF amp input 1 26 19 IF amp decoupling 1 1 26 20 2nd mixer output 3 09 U52 BW Select ...

Page 100: ... TX mode 8 Vcc 6 79 TX mode U201 Freq Synthesizer 1 AUX2 output NU 0 2 AUX3 output TRB 0 03 To U251 19 RX mode 3 AUX4 output NU 0 4 Lock detect output 2 98 To U401 56 5 PD Vdd 2 98 6 Digital ground GND 7 Serial data input 3 23 8 Serial clock input 0 9 Synth chip select 3 23 From U401 47 10 Modulation input 1 50 From U451 40 11 VMULT4 NU 2 98 12 VMULT3 NU 0 13 VRO 4 96 14 VMULT2 1 49 15 VMULT1 1 49...

Page 101: ...3 20V in TX mode 41 Modulation output 3 42 typ 1 62V typ in TX mode 42 CCOMP NU 0 05 43 Steering line IOUT 9 62 typ Depends on frequency 44 PD ground GND 45 Steering line IADAPT 9 62 typ Depends on frequency 46 Adapt switch NU 0 47 Voltage from charge pump 12 8 48 AUX1 output NU 2 98 U251 VCO Buffer 1 TX VCO current adjust 4 50 2 RX VCO current adjust 4 35 3 Superfiltered input 4 51 4 Collector RF...

Page 102: ...pacitor 1 26 5 Vout 4 96 U320 3 3V Regulator 1 Ground GND 2 Feedback 1 23 3 Tap NU 0 4 Vin 7 48 5 Vout 3 23 6 Sense NU 0 7 Error reset output 3 20 8 Shutdown input 7 48 U330 3V Regulator 1 Vin 7 48 2 Ground GND 3 Control input 7 48 4 Bypass capacitor 1 26 5 Vout 3 00 U401 Microprocessor 1 PD4_SCK serial clock input 0 2 PD5_SS 3 23 ASFIC chip select 3 PD6_VLIN 3 23 EEPROM chip select 4 PG7_R_W 3 21...

Page 103: ... 23 PF6_ADDR6 3 08 24 PF5_ADDR5 3 06 25 PF4_ADDR4 0 16 26 PF3_ADDR3 0 26 27 PF2_ADDR2 3 06 28 PF1_ADDR1 3 06 29 PFO_ADDR0 3 05 30 PC0_DATA0 0 69 31 PC1_DATA1 0 96 32 PC2_DATA2 1 10 33 PC3_DATA3 0 81 34 PC4_DATA4 0 62 35 PC5_DATA5 0 68 36 PC6_DATA6 0 67 37 PC7_DATA7 0 73 38 PH7_CSPROG 3 05 39 VDDL 3 23 40 VSSL GND 41 PH6_CSGP2 3 23 42 PH5_CSGP1 3 23 43 PH4_CSIO 0 44 PH3_PW4 3 21 On off control outp...

Page 104: ...12 59 AVDD 3 23 60 PE7_AN7 3 20 61 PE6_AN6 3 20 62 PE5_AN5 2 91 VOX threshold detect 63 PE4_AN4 0 73 RSSI input 64 PE3_AN3 0 14 65 PE2_AN2 1 62 66 PE1_AN1 0 3 3 V Volume control wiper 67 PE0_AN0 2 48 33 of battery voltage 68 VRL 0 69 VRH 3 20 70 AVSS GND 71 PJ0_CSGP3 3 23 Side PTT button 72 PJ1_CSGP4 0 External MIC PTT 73 PJ2 3 23 74 PJ3 3 23 75 PJ4 3 23 76 PJ5 0 77 PJ6 3 23 Bottom option button 7...

Page 105: ...ot used 92 VDDSYN 0 93 XFC NU 0 94 RESET 3 20 From U320 95 LVOUT 0 96 IRQ 3 20 97 PD0_RXD 3 23 98 PD1_TXD 1 9 99 PD2_MISO 0 100 PD3_MOSI 3 23 U402 EEPROM 1 Chip select 3 23 From U401 3 2 Serial data out 0 3 Write protect 3 23 4 Vss GND 5 Serial data in 3 23 6 Serial clock 0 7 Hold 3 23 8 Vcc 3 23 U404 Flash ROM 1 A11 3 06 2 A9 3 08 3 A8 3 05 4 A13 0 13 5 A14 0 31 6 NC 3 17 7 EN_WE 3 21 From U401 4...

Page 106: ...om U401 38 31 A10 0 16 32 EN_OE 0 From U401 86 U451 ASFIC_CMP 1 VDD for analog circuits 3 00 2 DISC audio input 1 34 From U510 3 Ground for analog circuits GND 4 DACU output 0 5 DACR output 0 6 DACG output 2 38 typ Power set TX mode 7 VOX peak detector output 2 91 8 PLCAP for DC integrator 0 40 9 SQIN 0 01 10 Universal audio input output 0 11 VDD for DACs 4 95 12 SQCAP 0 13 GCB2 general purpose ou...

Page 107: ...ut 1 70 29 1200 Hz ref for MDC decode 3 00 30 GNDDO GND 31 Ground for digital circuits GND 32 Vdd for analog switches 4 96 33 Vdd for digital circuits 3 00 34 16 8 MHz master clock input 1 54 35 GCB3 general purpose output 3 00 Internal MIC enable 36 TX audio return from option 0 37 GCB4 general purpose output 0 38 GCB5 general purpose output 0 39 RX audio send to option 1 48 40 Modulation output ...

Page 108: ...Unsquelched U510 Dual Opamp 1 Unit 1 output 1 75 2 Unit 1 input 1 56 3 Unit 1 input 1 55 4 Ground GND 5 Unit 2 input 1 55 6 Unit 2 input 1 56 7 Unit 2 output 1 38 8 Vcc 4 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 Al...

Page 109: ...November 24 2003 HKLN4216A Notes 10 16 UHF Troubleshooting Tables Troubleshooting Table for Board and IC Signals ...

Page 110: ...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 corr...

Page 111: ...nd filter BW select from ASFIC RSSI RX signal strength indication from IFIC to uP IF_IN OUT 44 85 MHz from 1st mixer to high IF filter RF_IN OUT RX signal from antenna switch to front end MOD OUT IN TX modulation from ASFIC to synthesizer 16_8_MHZ Ref osc signal from synthesizer to ASFIC SYNTH_CS Synthesizer chip select from uP SPI_CLK Serial clock from uP SPI_DATA_OUT Serial data from uP LOCK Loc...

Page 112: ...eaker and Microphone Schematic Figure 11 2 Speaker and Microphone Schematic 11 2 1 Speaker and Microphone Parts List Reference Designator Motorola Part No Description MK1 5085880L01 Microphone 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 SP1 1 2 1 2 MATES WITH J470 ON RADIO BOARD MATES WITH ...

Page 113: ...November 24 2003 HKLN4216A Notes 11 4 UHF Schematic Diagrams Overlays and Parts Lists Speaker and Microphone Schematic ...

Page 114: ...1 RX_FE_UHF_R1 UHF R1 TX_INJ USWB 3V 5R PRESC RX_INJ TRB TX_INJ VCO_MOD V_SF V_STEER 5R IF_OUT RX_IN RX_INJ 16_8_MHZ 3V 5V LOCK MOD_IN PRESC SPI_CLK SPI_DATA_OUT SYNTH_CS TRB VCO_MOD V_SF V_STEER 5T PWR_SET RX_OUT TX_ENA USWB 5V 5R 3V USWB 5V BW_SEL DEMOD IF_IN RSSI TX_ENA USWB 3V 5T 5T 5V 5R 3V 5R 5V 16_8_MHZ 3V 5R 5T 5V BW_SEL DEMOD LOCK MOD_OUT PWR_SET RSSI SPI_CLK SPI_DATA_OUT SYNTH_CS Figure ...

Page 115: ...SHIELD 1 L31 9 85nH 2 L3 680nH L52 1 0 C44 10pF BFS505 Q21 1 3 FE_IF_OUT C35 1 12pF 0 C48 RF BALUN 5 NC 4 6 3 2 1 T41 30pF NU C47 TP1 1 C43 1 13pF 1 C10 R24 1 2K C39 1 12pF TP2 1 SH1 SHIELD 1 1 3 2 18nH L55 CR1 2 4pF C30 1 22pF C13 4 2 9 1pF 1 1 C27 NU C46 C42 1 8pF 5 6 C6 1 0 10pF 390pF C25 R51 390pF 10 C21 L51 150nH 51 L2 2 9 85nH L32 27nH 9 85nH 2 L33 2 9 85nH L41 C38 1 16pF 2 5 6 3 1 4 UMT1 Q2...

Page 116: ...R57 C66 SH52 SHIELD 1 OUT IN 1 0 1uF 44 395MHz TSS2_44_395MHZ Y51 2 GND 4 GND1 3 2 CC1 5 CC2 1 GND1 4 GND2 3 IN 6 OUT 44 85MHz MXF45 FL51 4 VCC 8 C58 3 9pF PWR_GND U52 4 GND R81 10uF C91 0 1uF C65 1K R75 12K 20K C57 0 1uF 9180468V04 3 GND IN 1 OU T 2 R64 FLTR FL52 C81 1 33pF C70 IF_IN RFIN RFIN_DEC 2 5 RSSIOUT RSSI_FEED 9 6 VCC 130pF LIMIN LIMOUT 11 13 LIM_DEC1 12 LIM_DEC2 20 MIXOUT OSCIN 4 3 OSCO...

Page 117: ...DIN 41 MODOUT 17 NC1 29 NC2 31 NC3 44 PD_GND PD_VDD 5 32 CLK 7 DATA 6 DGND 36 DVDD 19 FREFOUT 45 IADAPT 16 INDMULT 43 IOUT LOCK AUX2 2 AUX3 3 AUX4 20 AVDD 40 BIAS1 39 BIAS2 42 CCOMP 9 CEX 8 46 ADAPTSW 22 AGND 48 AUX1 1 1 63A27 U201 FN_MOD TP200 C223 01uF 01uF TP240 1 C213 L211 390nH NU R212 0 R206 1 K1 2 K2 3 K3 6 A1 5 A2 4 A3 C221 D221 01uF 2 2uF C215 2 2uF FN_V_SF C218 C230 2 2uF C240 NC FN_VCO_...

Page 118: ...262 C290 6 8pF 13pF C291 C271 L271 390pF R272 NU 1 5 6K 0 1uF SH253 SHIELD SH250 SHIELD 1 C274 L262 27nH C268 20 0 5pF VCO_RX_INJ R253 V_SF 4 7K 33 2 12 5nH R280 C256 2 8 3 6pF L264 33nH V_SF 910 NC L281 L255 R282 22K NC 220nH 130 R261 R283 6 8pF 1 5 C267 C272 0 1uF L276 R284 330 R277 27nH R276 NU 0 C251 0888600M03 VCO_3V 8 2K 150pF 220nH R281 V_SF L272 L291 6 8nH 100 R254 C252 C276 3 9pF NU L252 ...

Page 119: ...nH L110 R100 220nH 820 0 1uF C101 L100 R158 5 1K 390pF C151 390pF C172 3pF C107 1 8K R111 C525 PA_RX_OU T 390pF 2 3 4 1 C170 390pF PA_PWR_SET BFG540W Q100 R110 PA_TX_ENA 510 Q171 R152 1 100K Q150 1 3 2 R159 0 390pF C158 390pF R103 C154 R157 2 2K 3K R101 5 6 R121 150 C122 9 1pF U150 2 LM2904 6 5 7 8 4 R162 8 7nH L102 10K 820 R102 PA_USWB 390pF C113 390pF C152 330 R156 220pF C124 0 47uF C153 C121 39...

Page 120: ... RX_ENA SWB TX_ENA USWB VOLUME 14 C407 1000pF CNTL_SYNTH_CS 3 A2 2 B1 4 B2 CNTL_SPI_CLK SWITCH S443 1 A1 C403 150p F 32 1000pF C40 2 5R CNTL_LOCK R505 100 1 A1 3 A2 2 B1 4 B2 CNTL_RSSI 3V SWITCH S441 8 24 6 29 28 27 C406 150pF C409 1000pF 150pF C405 5V C404 1000pF CNTL_SPI_DATA_OUT CNTL_5R 31 30 5V R503 13 100 21 18 19 TP404 15 16 1000pF 23 10 C500 CNTL_BW_SEL 1 A1 3 A2 B1 2 4 B2 USWB 5V SYNTH_CS ...

Page 121: ... R414 33K D414 NC R430 100K 0 R432 01uF C420 C412 1000pF D3_3V NC SH400 SHIELD 1 10uF 100K 1 R425 C410 0 1uF D3_3 V C432 R441 4 7K 4 7K R440 100K R418 C400 NU R400 NU 1000pF C417 D3_3V C433 1000pF C443 01uF SH401 SHIELD 1 SW_B NC 0 1uF C418 R416 20K Q440 2 2 4 3 R422 SW_B 1 3 2 NC 100K Q402 100K 1 R421 200K 1 R420 120 R443 01uF C445 C446 100K 01uF R423 BRPY1204W D440 01uF C421 4 7K R445 0 1uF R446...

Page 122: ...M2904 U510 1 0 R487 0 1uF Not_Placed NU C481 01uF NC NU R521 C482 Not Placed NU C463 0 1uF 01uF C480 0 1uF R520 100K U480 2 LM2904 6 5 7 8 4 5V_A 6 3 5V Not_Placed NU 5V_B Q470 10K R496 Not_Placed NU R480 0 BK1005HM471 E451 NC 100K R476 100K R486 5V_A Not_Placed NU 330K R488 Not_Placed NU R489 91K 0 1uF C472 680 R473 C492 10uF R460 24K IMX1 Q520 5 1 6 C484 033uF Not_Placed NU R479 100K R464 30K VR...

Page 123: ...1200pF 100K NC SHUTDOW N 8 TAP 3 R509 ERROR 7 FEEDBACK 2 GND 1 INPUT 4 OUTPUT 5 SENSE 6 C305 100pF LP2986 U320 C331 01uF 330K 1 R320 10uF 1200pF C321 R313 C315 R312 10K HIGH TAB1 6 TAB2 7 2 NC 20K S444 SWITCH 4 1 LOW 5 3 100K R508 01uF C322 C303 33uF Q494 2 6 4 1 3 018uF C320 Q313 01uF D3_3V C306 Q312 01uF C310 R510 330K D3_3V 018uF C311 NC TP302 1 R321 1 200K C314 1200pF D3_3V 20V MMBZ5250B VR301...

Page 124: ... J2 23 23 R3 J2 20 20 J1 3 3 J2 11 11 J2 1 1 QSMG H799 D6 J2 2 2 J2 22 22 D3 QSMG H799 J1 7 7 J1 2 2 J2 25 25 J2 26 26 D7 QSMG H799 C7 150pF DNF 0 1uF C4 R13 330 470 R12 22K R8 R9 J2 24 24 NC NC 43K J2 4 4 J2 6 6 5 J1 4 4 470 J1 5 NC NC R11 QSMG H799 D11 1 2 3 D10 QSMG H799 1 2 3 SWITCH S32 1 2 3 SWITCH S31 SWITCH S29 1 2 3 SWITCH S30 3 SWITCH S28 1 2 3 2 3 SWITCH S27 1 2 1 2 3 SWITCH S26 1 1 2 3 ...

Page 125: ... C503 C504 C505 C506 C507 C513 C521 C522 C523 C524 CR1 D251 D261 D262 D301 D424 D470 D471 E452 E500 F301 4 3 2 FL53 4 3 2 FL54 J140 3 2 J301 J470 6 4 7 5 2 3 J471 L1 L2 L3 L21 L31 L32 L33 L34 L55 L211 L251 L252 L254 L255 L262 L264 L265 L281 L283 L471 M140 Q21 Q171 Q280 Q402 Q403 Q440 Q472 R22 R24 R25 R61 R63 R205 R212 R220 R221 R223 R230 R243 R244 R245 R247 R253 R254 R261 R262 R263 R264 R280 R281 ...

Page 126: ...460 2 J491 L40 L41 L51 L52 L53 L54 L81 L100 L101 L102 L103 L110 L120 L121 L130 L131 L132 L140 L141 L270 L271 L272 L276 L282 L291 L292 Q22 Q51 Q70 4 3 2 Q100 Q150 1 6 3 4 Q170 Q311 Q312 4 3 Q313 4 3 Q410 Q470 4 3 Q471 Q481 Q482 4 3 Q490 Q493 4 3 Q494 Q520 R20 R21 R23 R40 R51 R52 R53 R54 R55 R57 R60 R62 R64 R65 R66 R67 R72 R73 R74 R75 R76 R77 R78 R80 R81 R82 R90 R91 R100 R101 R102 R103 R104 R105 R10...

Page 127: ...arts Lists December 4 2003 HKLN4216A D1 D2 D3 D4 D5 D6 D7 D8 D9 D10 D11 C1 C2 C3 C4 C5 C6 C7 C8 G1 G2 9 J1 28 1 g1 g2 J2 R1 R2 R3 R4 R5 R6 R7 R8 R9 R10 R11 R12 R13 R14 R15 Component Side Solder Side Figure 11 16 UHF 403 440 MHz PCB 8486635Z03 O Keypad Board ...

Page 128: ... 8 2pF C150 2113743L07 CAP 390pF C151 2113743L07 CAP 390pF Circuit Ref Motorola Part No Description C152 2113743L07 CAP 390pF C153 2113743K18 CAP 0 47uF C154 2113743L07 CAP 390pF C156 2113743L41 CAP 01uF C157 2113743M24 CAP 0 1uF C158 2113743L07 CAP 390pF C159 2113743L07 CAP 390pF C170 2113743L07 CAP 390pF C171 2113743L07 CAP 390pF C172 2113743L07 CAP 390pF C201 2113740F59 CAP 220pF C202 2109445U5...

Page 129: ...973Z02 MA4PH261 D201 4862824C03 1SV232 D220 4802233J09 IMN10 D221 4802233J09 IMN10 D251 4862824C01 1SV229 D261 4862824C01 1SV229 Circuit Ref Motorola Part No Description D262 4862824C01 1SV229 D301 4813833A19 MBRM120ET3 D414 4805129M41 MMBD501 D424 4809924D18 RB520S 30 D440 4805729G49 BRPY1204W D470 4809924D18 RB520S 30 D471 4809924D18 RB520S 30 D491 Not_Placed MMBD501 E451 2480640Z01 BK1005HM471 ...

Page 130: ...ES 20K R417 0662057M98 RES 10K R418 0662057N23 RES 100K R419 0662057M90 RES 4 7K R420 0662057V35 RES 200K Circuit Ref Motorola Part No Description R421 0662057V27 RES 100K R422 0662057N23 RES 100K R423 0662057N23 RES 100K R424 0662057V35 RES 200K R425 0662057V27 RES 100K R430 0662057N23 RES 100K R431 Not_Placed RES 100K R432 0662057M01 RES 0 R433 0662057N23 RES 100K R434 Not_Placed RES 100K R440 0...

Page 131: ...laced 45J68 Circuit Ref Motorola Part No Description C1 NOTPLACED CAP 150pF C2 2113740F55 CAP 150pF C3 NOTPLACED CAP 150pF C4 2113743E20 CAP 0 1uF C5 NOTPLACED CAP 150pF C6 NOTPLACED CAP 150pF C7 NOTPLACED CAP 150pF C8 NOTPLACED CAP 150pF D1 4809496B11 QSMG H799 D2 4809496B11 QSMG H799 D3 NOTPLACED QSMG H799 D4 NOTPLACED QSMG H799 D5 NOTPLACED QSMG H799 D6 NOTPLACED QSMG H799 D7 NOTPLACED QSMG H79...

Page 132: ...CO_UHF_R2 RX_BE IF_IN RSSI UHF R2 RX_OUT TX_ENA TX_INJ USWB 3V 5R PRESC RX_INJ TRB TX_INJ VCO_MOD V_SF V_STEER 5V BW_SEL DEMOD RX_INJ 16_8_MHZ 3V 5V LOCK MOD_IN PRESC SPI_CLK SPI_DATA_OUT SYNTH_CS TRB VCO_MOD V_SF V_STEER 5T PWR_SET 5R USWB 5V 5R 3V USWB 5R IF_OUT RX_IN SPI_CLK SPI_DATA_OUT SYNTH_CS TX_ENA USWB 3V 5T 5T 5V 5R 3V 5V 16_8_MHZ 3V 5R 5T 5V BW_SEL DEMOD LOCK MOD_OUT PWR_SET RSSI Figure...

Page 133: ...L34 C8 2 5 1pF L31 2 9 85nH 9 85nH 2 L3 C13 6 7 1 5pF 680nH L52 0 C48 BFS505 Q21 1 3 2 FE_IF_OUT C35 1 3 7 5pF 1 C43 20pF 4 6 3 2 1 TP1 T41 RF BALUN 5 NC C47 1 TP2 1 SH1 SHIELD CR1 1 3 2 22nH L55 1 16pF C1 C30 C27 9 1pF 1 1 C33 7 5pF 1 3 390pF 20pF 1 C23 1 5pF 6 7 C14 C2 8pF 1 25 C6 9 1pF 1 1 5 1pF C521 FE_RF_INJ R25 5 6K T42 5 NC 4 6 3 2 1 IF BALUN NC L2 2 9 85nH L21 22nH 1K R40 C45 16pF NC L33 2...

Page 134: ... R57 C66 SH52 SHIELD 1 OUT IN 1 0 1uF 44 395MHz TSS2_44_395MHZ Y51 2 GND 4 GND1 3 2 CC1 5 CC2 1 GND1 4 GND2 3 IN 6 OUT 44 85MHz MXF45 FL51 4 VCC 8 C58 3 9pF PWR_GND U52 4 GND R81 10uF C91 0 1uF C65 1K R75 12K 20K C57 0 1uF 9180468V04 3 GND IN 1 OU T 2 R64 FLTR FL52 C81 1 33pF C70 IF_IN RFIN RFIN_DEC 2 5 RSSIOUT RSSI_FEED 9 6 VCC 130pF LIMIN LIMOUT 11 13 LIM_DEC1 12 LIM_DEC2 20 MIXOUT OSCIN 4 3 OSC...

Page 135: ...5 NC Y201 14R06 16 8MHz XTAL1 23 XTAL2 24 C202 1 62pF VBPASS 21 VCP 47 VMULT1 15 VMULT2 14 VMULT3 12 VMULT4 11 13 VRO WARP 25 PVREF 35 REFSEL 18 SFBASE 27 SFCAP 26 SFIN 30 SFOUT 28 TEST1 37 TEST2 38 NC1 17 NC2 29 NC3 31 PD_GND 44 5 PD_VDD PREIN 32 PRE_GND 33 PRE_VDD 34 DVDD 36 FREFOUT 19 IADAPT 45 INDMULT 16 IOUT 43 4 LOCK MODIN 10 MODOUT 41 AVDD 20 BIAS1 40 BIAS2 39 CCOMP 42 CEX 9 CLK 8 DATA 7 DG...

Page 136: ... 390pF D261 2pF 5 C264 4 7pF 2 1 C263 100 R275 R273 330 1 3 2 0 R285 Q280 BFS540 VCO_TRB D251 VCO_V_STEER R271 5 1K C281 C285 390pF 390pF 0 1uF C292 12 5nH 2 L254 VCO_TX_INJ 6 2pF C286 C275 390pF C283 390pF V_SF D262 1SV229 NC L255 220nH 22K R261 TX_EMITTER 1 TX_IADJ 10 TX_OUT 13 TX_SWITCH 14 VCC_BUFFERS 18 VCC_LOGIC RX_BASE 6 RX_EMITTER 2 RX_IADJ 8 RX_OUT 7 RX_SWITCH 3 SUPER_FLTR TRB_IN 19 16 TX_...

Page 137: ...106 18 3 6nH 390pF R104 220nH C100 Q171 L100 R152 1 100K 390pF C159 PA_USWB PA_TX_EN A 5 1nH L103 TP150 1 3 9pF PA_TX_IN J C105 57R01 U151 NC U150 1 LM2904 2 3 1 8 4 220nH L101 100K 1 R154 100K 1 R153 C133 NU C153 C108 0 47uF L110 390pF C111 220nH C135 NU 390pF C101 TAB1 1 TAB2 2 TAB3 3 TAB4 4 0 1uF M140 ANTENNA_NUT 01uF C156 C131 NU 17 02nH L131 PA_RX_OU T 3K R103 R157 2 2K R101 5 6 C122 5 1pF Q1...

Page 138: ...CHARGE D3_3 V ON_OFF RESET RX_ENA SWB TX_ENA USWB VOLUME 14 C407 1000pF CNTL_SYNTH_CS 3 A2 2 B1 4 B2 CNTL_SPI_CLK SWITCH S443 1 A1 C403 150p F 32 1000pF C40 2 5R CNTL_LOCK R505 100 1 A1 3 A2 2 B1 4 B2 CNTL_RSSI 3V SWITCH S441 8 24 6 29 28 27 C406 150pF C409 1000pF 150pF C405 5V C404 1000pF CNTL_SPI_DATA_OUT CNTL_5R 31 30 5V R503 13 100 21 18 19 TP404 15 16 1000pF 23 10 C500 CNTL_BW_SEL 1 A1 3 A2 B...

Page 139: ... R414 33K D414 NC R430 100K 0 R432 01uF C420 C412 1000pF D3_3V NC SH400 SHIELD 1 10uF 100K 1 R425 C410 0 1uF D3_3 V C432 R441 4 7K 4 7K R440 100K R418 C400 NU R400 NU 1000pF C417 D3_3V C433 1000pF C443 01uF SH401 SHIELD 1 SW_B NC 0 1uF C418 R416 20K Q440 2 2 4 3 R422 SW_B 1 3 2 NC 100K Q402 100K 1 R421 200K 1 R420 120 R443 01uF C445 C446 100K 01uF R423 BRPY1204W D440 01uF C421 4 7K R445 0 1uF R446...

Page 140: ...4 U510 1 0 R487 0 1uF Not_Placed NU C481 01uF NC NU R521 C482 Not Placed NU C463 0 1uF 01uF C480 0 1uF R520 100K U480 2 LM2904 6 5 7 8 4 5V_A 6 3 5V Not_Placed NU 5V_B Q470 10K R496 Not_Placed NU R480 0 BK1005HM471 E451 NC 100K R476 100K R486 5V_A Not_Placed NU 330K R488 Not_Placed NU R489 91K 0 1uF C472 680 R473 C492 10uF R460 24K IMX1 Q520 5 1 6 C484 033uF Not_Placed NU R479 100K R464 30K VR473 ...

Page 141: ...200pF 100K NC SHUTDOW N 8 TAP 3 R509 ERROR 7 FEEDBACK 2 GND 1 INPUT 4 OUTPUT 5 SENSE 6 C305 100pF LP2986 U320 C331 01uF 330K 1 R320 10uF 1200pF C321 R313 C315 R312 10K HIGH TAB1 6 TAB2 7 2 NC 20K S444 SWITCH 4 1 LOW 5 3 100K R508 01uF C322 C303 33uF Q494 2 6 4 1 3 018uF C320 Q313 01uF D3_3V C306 Q312 01uF C310 R510 330K D3_3V 018uF C311 NC TP302 1 R321 1 200K C314 1200pF D3_3V 20V MMBZ5250B VR301 ...

Page 142: ... J2 23 23 R3 J2 20 20 J1 3 3 J2 11 11 J2 1 1 QSMG H799 D6 J2 2 2 J2 22 22 D3 QSMG H799 J1 7 7 J1 2 2 J2 25 25 J2 26 26 D7 QSMG H799 C7 150pF DNF 0 1uF C4 R13 330 470 R12 22K R8 R9 J2 24 24 NC NC 43K J2 4 4 J2 6 6 5 J1 4 4 470 J1 5 NC NC R11 QSMG H799 D11 1 2 3 D10 QSMG H799 1 2 3 SWITCH S32 1 2 3 SWITCH S31 SWITCH S29 1 2 3 SWITCH S30 3 SWITCH S28 1 2 3 2 3 SWITCH S27 1 2 1 2 3 SWITCH S26 1 1 2 3 ...

Page 143: ...505 C506 C507 C513 C521 C522 C523 C524 CR1 D251 D261 D262 D301 D424 D470 D471 E452 E500 F301 4 3 2 FL53 4 3 2 FL54 J140 3 2 J301 J470 6 4 7 5 2 3 J471 L1 L2 L3 L21 L31 L32 L33 L34 L55 L211 L251 L252 L254 L255 L262 L264 L265 L281 L283 L471 M140 Q21 Q171 Q280 Q402 Q403 Q440 Q472 R22 R24 R25 R61 R63 R205 R212 R220 R221 R223 R230 R243 R244 R245 R247 R253 R254 R261 R262 R263 R264 R280 R281 R282 R283 R2...

Page 144: ... 2 29 30 32 31 J460 2 J491 L40 L41 L51 L52 L53 L54 L81 L100 L101 L102 L103 L110 L120 L121 L130 L131 L132 L140 L141 L270 L271 L272 L276 L282 L291 L292 Q22 Q51 Q70 4 3 2 Q100 Q150 1 6 3 4 Q170 Q311 Q312 4 3 Q313 4 3 Q410 Q470 4 3 Q471 Q481 Q482 4 3 Q490 Q493 4 3 Q494 Q520 R20 R21 R23 R40 R51 R52 R53 R54 R55 R57 R60 R62 R64 R65 R66 R67 R72 R73 R74 R75 R76 R77 R78 R80 R81 R82 R90 R91 R100 R101 R102 R1...

Page 145: ...ists November 24 2003 HKLN4216A D1 D2 D3 D4 D5 D6 D7 D8 D9 D10 D11 C1 C2 C3 C4 C5 C6 C7 C8 G1 G2 9 J1 28 1 g1 g2 J2 R1 R2 R3 R4 R5 R6 R7 R8 R9 R10 R11 R12 R13 R14 R15 Component Side Solder Side Figure 11 29 UHF 438 470 MHz PCB 8486348Z13 C Board Solder Side View ...

Page 146: ... CAP 6 8pF C135 Not_Placed CAP 0 5pF C136 2113740F18 CAP 4 3pF Circuit Ref Motorola Part No Description C137 2113740F59 CAP 220pF C141 Not_Placed CAP 8 2pF C150 2113743L07 CAP 390pF C151 2113743L07 CAP 390pF C152 2113743L07 CAP 390pF C153 2113743K18 CAP 0 47uF C154 2113743L07 CAP 390pF C155 2113743E20 CAP 0 1uF C156 2113743L41 CAP 01uF C157 2113743M24 CAP 0 1uF C158 2113743L07 CAP 390pF C159 21137...

Page 147: ...2246J04 HSMS2829 CR51 4813825A19 MMBD352 D51 4802245J97 DAN235ETL D52 4802245J97 DAN235ETL D120 4880973Z02 MA4PH261 D121 4880973Z02 MA4PH261 Circuit Ref Motorola Part No Description D201 4862824C03 1SV232 D220 4802233J09 IMN10 D221 4802233J09 IMN10 D251 4862824C01 1SV229 D261 4862824C01 1SV229 D262 4862824C01 1SV229 D301 4813833A19 MBRM120ET3 D414 4805129M41 MMBD501 D440 4805729G49 BRPY1204W D470 ...

Page 148: ...ES 100K R414 0662057N11 RES 33K R415 0662057N11 RES 33K R416 0662057N06 RES 20K R417 0662057M98 RES 10K Circuit Ref Motorola Part No Description R418 0662057N23 RES 100K R419 0662057M90 RES 4 7K R420 0662057V35 RES 200K R421 0662057V27 RES 100K R422 0662057N23 RES 100K R423 0662057N23 RES 100K R424 0662057V35 RES 200K R425 0662057V27 RES 100K R430 0662057N23 RES 100K R431 Not_Placed RES 100K R432 ...

Page 149: ...06 Y202 Not_Placed 45J68 Circuit Ref Motorola Part No Description C1 NOTPLACED CAP 150pF C2 2113740F55 CAP 150pF C3 NOTPLACED CAP 150pF C4 2113743E20 CAP 0 1uF C5 NOTPLACED CAP 150pF C6 NOTPLACED CAP 150pF C7 NOTPLACED CAP 150pF C8 NOTPLACED CAP 150pF D1 4809496B11 QSMG H799 D2 4809496B11 QSMG H799 D3 NOTPLACED QSMG H799 D4 NOTPLACED QSMG H799 D5 NOTPLACED QSMG H799 D6 NOTPLACED QSMG H799 D7 NOTPL...

Page 150: ...RX_FE_UHF_R3 UHF R3 TX_ENA TX_INJ USWB 3V 5R PRESC RX_INJ TRB TX_INJ VCO_MOD V_SF V_STEER 5R IF_OUT RX_IN RX_INJ 3V 5V LOCK MOD_IN PRESC SPI_CLK SPI_DATA_OUT SYNTH_CS TRB VCO_MOD V_SF V_STEER 5T PWR_SET RX_OUT USWB 5V 5R 3V USWB 5V BW_SEL DEMOD IF_IN RSSI 16_8_MHZ SYNTH_CS TX_ENA USWB 3V 5T 5T 5V 5R 3V 5R 5V 16_8_MHZ 3V 5R 5T 5V BW_SEL DEMOD LOCK MOD_OUT PWR_SET RSSI SPI_CLK SPI_DATA_OUT Figure 11...

Page 151: ... 1 C44 C36 1 18pF C20 390pF C34 1 6 6 2pF C522 0 5pF 68pF 1 C21 R51 L51 150nH 51 1 6 6 2pF 27nH C9 L41 R22 5 6K 6 3 1 4 4 3pF 2 3 C3 UMT1 Q22 2 5 1 6 6 2pF IF1 C11 390pF C29 C4 1 0 10pF 9 85nH 2 L34 C8 2 3 4 3pF L31 2 9 85nH 9 85nH 2 L3 1 5pF 6 7 C13 680nH L52 BFS505 Q21 1 3 0 C48 FE_IF_OUT C35 1 6 6 2pF C43 1 20pF 1 TP1 1 T41 RF BALUN 5 NC 4 6 3 2 C47 1 NU SH1 SHIELD 1 TP2 2 22nH L55 CR1 1 3 C30 ...

Page 152: ...57 C66 SH52 SHIELD 1 OUT IN 1 0 1uF 44 395MHz TSS2_44_395MHZ Y51 2 GND 4 GND1 3 2 CC1 5 CC2 1 GND1 4 GND2 3 IN 6 OUT 44 85MHz MXF45 FL51 4 VCC 8 C58 3 9pF PWR_GND U52 4 GND R81 10uF C91 0 1uF C65 1K R75 12K 20K C57 0 1uF 9180468V04 3 GND IN 1 OU T 2 R64 FLTR FL52 C81 1 33pF C70 IF_IN RFIN RFIN_DEC 2 5 RSSIOUT RSSI_FEED 9 6 VCC 130pF LIMIN LIMOUT 11 13 LIM_DEC1 12 LIM_DEC2 20 MIXOUT OSCIN 4 3 OSCOU...

Page 153: ...41 MODOUT 17 NC1 29 NC2 31 NC3 44 PD_GND PD_VDD 5 32 CLK 7 DATA 6 DGND 36 DVDD 19 FREFOUT 45 IADAPT 16 INDMULT 43 IOUT LOCK AUX2 2 AUX3 3 AUX4 20 AVDD 40 BIAS1 39 BIAS2 42 CCOMP 9 CEX 8 46 ADAPTSW 22 AGND 48 AUX1 1 1 63A 27 U201 FN_MOD TP200 C223 01uF 01uF TP240 1 C213 L211 390nH NU R212 0 R206 1 K1 2 K2 3 K3 6 A1 5 A2 4 A3 C221 D221 01uF 2 2uF C215 2 2uF FN_V_SF C218 C230 2 2uF C240 NC FN_VCO_MOD...

Page 154: ...66 220nH L265 R264 220nH L270 100 C252 NU 33 R274 L252 27nH C253 1 6 6 2pF R262 7 5K 390pF C284 D261 C264 3 3 3 0pF C263 1 6 6 2pF R275 100 330 R273 R285 0 BFS540 Q280 1 3 2 VCO_TRB D251 R271 5 1K C281 390pF VCO_V_STEER C285 0 1uF 390pF C292 VCO_TX_INJ L254 2 12 5nH VCO_PRESC R280 4 7K 2 5 3 9pF L292 C256 18nH 15nH L282 18nH L281 R282 910 NC VCO_MOD VCO_VSF R283 130 9 1pF 1 1 C267 C272 0 1uF R284 ...

Page 155: ... 5 S1 4 S2 6 8pF C104 20 45nH L130 R153 1 100K R110 680 Q170 EMB10 5 2 3 6 4 1 L121 15nH C132 6 8pF 01uF 0 1uF C102 C156 C111 390pF 18 R104 C116 0 1uF 220pF C137 R105 2 7K R156 330 VGG 2 17 02nH L132 U110 RA07M4452M_UHF GND 5 RFIN 1 RFOUT 4 VDD 3 C134 6 8pF 0 1uF C112 C130 2K NU R111 C152 390pF 0 1uF C160 L110 220nH NC 390pF C100 C136 4 3pF R100 820 PA_TX_EN A Q171 100K 1 R152 TP150 1 L103 5 1nH 3...

Page 156: ...X_ENA SWB TX_ENA USWB VOLUME 14 C407 1000pF CNTL_SYNTH_CS 3 A2 2 B1 4 B2 CNTL_SPI_CLK SWITCH S443 1 A1 C403 150p F 32 1000pF C40 2 5R CNTL_LOCK R505 100 1 A1 3 A2 2 B1 4 B2 CNTL_RSSI 3V SWITCH S441 8 24 6 29 28 27 C406 150pF C409 1000pF 150pF C405 5V C404 1000pF CNTL_SPI_DATA_OUT CNTL_5R 31 30 5V R503 13 100 21 18 19 TP404 15 16 1000pF 23 10 C500 CNTL_BW_SEL 1 A1 3 A2 B1 2 4 B2 USWB 5V SYNTH_CS TX...

Page 157: ... R414 33K D414 NC R430 100K 0 R432 01uF C420 C412 1000pF D3_3V NC SH400 SHIELD 1 10uF 100K 1 R425 C410 0 1uF D3_3 V C432 R441 4 7K 4 7K R440 100K R418 C400 NU R400 NU 1000pF C417 D3_3V C433 1000pF C443 01uF SH401 SHIELD 1 SW_B NC 0 1uF C418 R416 20K Q440 2 2 4 3 R422 SW_B 1 3 2 NC 100K Q402 100K 1 R421 200K 1 R420 120 R443 01uF C445 C446 100K 01uF R423 BRPY1204W D440 01uF C421 4 7K R445 0 1uF R446...

Page 158: ...2904 U510 1 0 R487 0 1uF Not_Placed NU C481 01uF NC NU R521 C482 Not Placed NU C463 0 1uF 01uF C480 0 1uF R520 100K U480 2 LM2904 6 5 7 8 4 5V_A 6 3 5V Not_Placed NU 5V_B Q470 10K R496 Not_Placed NU R480 0 BK1005HM471 E451 NC 100K R476 100K R486 5V_A Not_Placed NU 330K R488 Not_Placed NU R489 91K 0 1uF C472 680 R473 C492 10uF R460 24K IMX1 Q520 5 1 6 C484 033uF Not_Placed NU R479 100K R464 30K VR4...

Page 159: ...1200pF 100K NC SHUTDOW N 8 TAP 3 R509 ERROR 7 FEEDBACK 2 GND 1 INPUT 4 OUTPUT 5 SENSE 6 C305 100pF LP2986 U320 C331 01uF 330K 1 R320 10uF 1200pF C321 R313 C315 R312 10K HIGH TAB1 6 TAB2 7 2 NC 20K S444 SWITCH 4 1 LOW 5 3 100K R508 01uF C322 C303 33uF Q494 2 6 4 1 3 018uF C320 Q313 01uF D3_3V C306 Q312 01uF C310 R510 330K D3_3V 018uF C311 NC TP302 1 R321 1 200K C314 1200pF D3_3V 20V MMBZ5250B VR301...

Page 160: ...J2 23 23 R3 J2 20 20 J1 3 3 J2 11 11 J2 1 1 QSMG H799 D6 J2 2 2 J2 22 22 D3 QSMG H799 J1 7 7 J1 2 2 J2 25 25 J2 26 26 D7 QSMG H799 C7 150pF DNF 0 1uF C4 R13 330 470 R12 22K R8 R9 J2 24 24 NC NC 43K J2 4 4 J2 6 6 5 J1 4 4 470 J1 5 NC NC R11 QSMG H799 D11 1 2 3 D10 QSMG H799 1 2 3 SWITCH S32 1 2 3 SWITCH S31 SWITCH S29 1 2 3 SWITCH S30 3 SWITCH S28 1 2 3 2 3 SWITCH S27 1 2 1 2 3 SWITCH S26 1 1 2 3 S...

Page 161: ...04 C505 C506 C507 C513 C521 C522 C523 C524 CR1 D251 D261 D262 D301 D424 D470 D471 E452 E500 F301 4 3 2 FL53 4 3 2 FL54 J140 3 2 J301 J470 6 4 7 5 2 3 J471 L1 L2 L3 L21 L31 L32 L33 L34 L55 L211 L251 L252 L254 L255 L262 L264 L265 L281 L283 L471 M140 Q21 Q171 Q280 Q402 Q403 Q440 Q472 R22 R24 R25 R61 R63 R205 R212 R220 R221 R223 R230 R243 R244 R245 R247 R253 R254 R261 R262 R263 R264 R280 R281 R282 R28...

Page 162: ... 29 30 32 31 J460 2 J491 L40 L41 L51 L52 L53 L54 L81 L100 L101 L102 L103 L110 L120 L121 L130 L131 L132 L140 L141 L270 L271 L272 L276 L282 L291 L292 Q22 Q51 Q70 4 3 2 Q100 Q150 1 6 3 4 Q170 Q311 Q312 4 3 Q313 4 3 Q410 Q470 4 3 Q471 Q481 Q482 4 3 Q490 Q493 4 3 Q494 Q520 R20 R21 R23 R40 R51 R52 R53 R54 R55 R57 R60 R62 R64 R65 R66 R67 R72 R73 R74 R75 R76 R77 R78 R80 R81 R82 R90 R91 R100 R101 R102 R103...

Page 163: ...arts Lists November 24 2003 HKLN4216A D1 D2 D3 D4 D5 D6 D7 D8 D9 D10 D11 C1 C2 C3 C4 C5 C6 C7 C8 G1 G2 9 J1 28 1 g1 g2 J2 R1 R2 R3 R4 R5 R6 R7 R8 R9 R10 R11 R12 R13 R14 R15 Component Side Solder Side Figure 11 43 UHF 465 495 MHz PCB8486634Z02 O Keypad Board ...

Page 164: ...3740F23 CAP 6 8pF C135 Not_Placed CAP 0 5pF C136 2113740F18 CAP 4 3pF Circuit Ref Motorola Part No Description C137 2113740F59 CAP 220pF C141 2113740F03 CAP 1pF C150 2113743L07 CAP 390pF C151 2113743L07 CAP 390pF C152 2113743L07 CAP 390pF C153 2113743K18 CAP 0 47uF C154 2113743L07 CAP 390pF C156 2113743L41 CAP 01uF C157 2113743M24 CAP 0 1uF C158 2113743L07 CAP 390pF C159 2113743L07 CAP 390pF C160 ...

Page 165: ...6J04 HSMS2829 CR51 4813825A19 MMBD352 D51 4802245J97 DAN235ETL D52 4802245J97 DAN235ETL D120 4880973Z02 MA4PH261 D121 4880973Z02 MA4PH261 Circuit Ref Motorola Part No Description D201 4862824C03 1SV232 D220 4802233J09 IMN10 D221 4802233J09 IMN10 D251 4862824C01 1SV229 D261 4862824C01 1SV229 D262 4862824C01 1SV229 D301 4813833A19 MBRM120ET3 D414 4805129M41 MMBD501 D424 4809924D18 RB520S 30 D440 480...

Page 166: ... R413 0662057N23 RES 100K R414 0662057N11 RES 33K R415 0662057N11 RES 33K R416 0662057N06 RES 20K Circuit Ref Motorola Part No Description R417 0662057M98 RES 10K R418 0662057N23 RES 100K R419 0662057M90 RES 4 7K R420 0662057V35 RES 200K R421 0662057V27 RES 100K R422 0662057N23 RES 100K R423 0662057N23 RES 100K R424 0662057V35 RES 200K R425 0662057V27 RES 100K R430 0662057N23 RES 100K R431 Not_Pla...

Page 167: ...145B02 45B02 Y201 4880114R06 14R06 Y202 Not_Placed 45J68 Circuit Ref Motorola Part No Description C1 NOTPLACED CAP 150pF C2 2113740F55 CAP 150pF C3 NOTPLACED CAP 150pF C4 2113743E20 CAP 0 1uF C5 NOTPLACED CAP 150pF C6 NOTPLACED CAP 150pF C7 NOTPLACED CAP 150pF C8 NOTPLACED CAP 150pF D1 4809496B11 QSMG H799 D2 4809496B11 QSMG H799 D3 NOTPLACED QSMG H799 D4 NOTPLACED QSMG H799 D5 NOTPLACED QSMG H799...

Page 168: ...r 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 Microproc...

Page 169: ...heory Of Operation 4 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 7 1 Introduction UHF 438 470 MHz Theory Of Operation 8 1 Introduction UHF 465 495 MHz Theory Of Operation 9 1 Introduction UHF Schematic Diagrams Overlays and Parts Lists 11 1 Introduction VHF 146 174 ...

Page 170: ...ont End UHF 438 470 MHz Theory Of Operation 8 1 Receiver Front End UHF 465 495 MHz Theory Of Operation 9 1 Receiver Front End VHF 146 174 MHz Theory Of Operation 4 1 Receiver UHF 438 470 MHz Theory Of Operation 8 1 Receiver UHF 403 440 MHz Theory Of Operation 7 1 Receiver UHF 465 495 MHz Theory Of Operation 9 1 Related Publications x S Sensing of Externally Connected Accessories Controller Theory ...

Page 171: ...oting Table for Transmitter UHF 10 4 Troubleshooting Table for Transmitter VHF 146 174 MHz 5 4 U UHF 403 440 MHz Theory Of Operation 7 1 UHF 438 470 MHz Theory Of Operation 8 1 UHF 465 495 MHz Theory Of Operation 9 1 UHF 403 440 MHz Theory Of Operation 7 1 Introduction 7 1 UHF Receiver 7 1 Receiver Front End 7 1 Receiver Back End 7 2 UHF Transmitter 7 3 Transmitter Power Amplifier 7 3 Antenna Swit...

Page 172: ...ubleshooting Table for Synthesizer 10 3 Troubleshooting Table for Transmitter 10 4 Troubleshooting Table for Board and IC Signals 10 6 V VHF 146 174 MHz Keypad Board Parts List 6 22 VHF 146 174 MHz Radio Parts List 6 19 VHF 146 174 MHz Schematic Diagrams Overlays and Parts Lists 6 1 VHF 146 174 MHz Theory Of Operation 4 1 VHF 146 174 MHz Troubleshooting Tables 5 1 VHF Receiver VHF 146 174 MHz Theo...

Page 173: ... 1 Troubleshooting Table for Receiver 5 1 Troubleshooting Table for Synthesizer 5 3 Troubleshooting Table for Transmitter 5 4 Troubleshooting Table for Board and IC Signals 5 6 Voltage Controlled Oscillator VCO UHF 465 495 MHz Theory Of Operation 9 6 Voltage Controlled Oscillator VCO VHF 146 174 MHz Theory Of Operation 4 6 Voltage Controlled Oscillator VCO UHF 403 440 MHz Theory Of Operation 7 6 V...

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