Motorola C1004 Service Manual

Portable RadiosDetailed Service ManualEP350

vi Table of Contents4.3.8 Battery indicator ...

10-13 Circuit Board/Schematic Diagram and Parts List (VHF: 136–174 MHz)Figure 10-15. VHF (136–174 MHz) Keypad Board: PCB No. 8422BEACON100MIC1CR110 CR

Circuit Board/Schematic Diagram and Parts List (VHF: 136–174 MHz) 10-1410.3.1 Parts ListCircuit Ref.Supplier Supplier Part No. DescriptionB401 TDK – C

10-15 Circuit Board/Schematic Diagram and Parts List (VHF: 136–174 MHz)C301 TDK – Chip Cap, 1005 J 47pFC304 TDK – Chip Cap,1005 J 20PFC305 TDK – Chip

Circuit Board/Schematic Diagram and Parts List (VHF: 136–174 MHz) 10-16C502 HITACH – Chip Tantal, 22uF-M/16V(B)C503 TDK – Chip Cap,1005 Z 0.1μFC506 TD

10-17 Circuit Board/Schematic Diagram and Parts List (VHF: 136–174 MHz)C727 TDK – Chip Cap, 1005 C 3PFC728 TDK – Chip Cap, 1005 D 10PFC729 TDK – Chip

Circuit Board/Schematic Diagram and Parts List (VHF: 136–174 MHz) 10-18FL701 BGTech 8289012R80010 SHINSUNG, VCTCXO, 12.8 MHZJ101 BGTech 851607C01S110

10-19 Circuit Board/Schematic Diagram and Parts List (VHF: 136–174 MHz)Q122 KEC – KRC 404Q201 KEC – KRC 404Q202 KEC – KRC 404Q206 KEC – KRC 404Q207 KE

Circuit Board/Schematic Diagram and Parts List (VHF: 136–174 MHz) 10-20R141KAMAYA – Chip Res, 1005 J 100KΩR142KAMAYA – Chip Res, 1005 J 330KΩR143 KAMA

10-21 Circuit Board/Schematic Diagram and Parts List (VHF: 136–174 MHz)R402 KAMAYA – Chip Res, 1005 J 39ΩR403 KAMAYA – Chip Res, 1005 J 180ΩR404 KAMAY

Circuit Board/Schematic Diagram and Parts List (VHF: 136–174 MHz) 10-22Note:1: Not for PMUD2441AALR701 KAMAYA – Chip Res, 1005 J 100ΩR702 KAMAYA – Chi

Table of Contents vii8.4.3 Voltage Doubler and Charge Pump... 8-58.4.4

10-23Notes

Chapter 11 403 – 447 MHz UHF1 Theory Of Operation11.1 IntroductionThis chapter provides a detailed theory of operation for the radio components. Schem

11-2 403 – 447 MHz UHF1 Theory Of Operation: UHF1 Receiver11.2.1 Receiver Front EndIncoming RF signals from antenna are first routed through the harmo

403 – 447 MHz UHF1 Theory Of Operation: UHF1 Transmitter 11-311.3 UHF1 TransmitterThe UHF1 transmitter covers the range of 403 – 447MHz. Depending on

11-4 403 – 447 MHz UHF1 Theory Of Operation: UHF1 Frequency Generation Circuitry11.3.4 Auto Power ControlThe APC keeps the current supply constant to

403 – 447 MHz UHF1 Theory Of Operation: UHF1 Frequency Generation Circuitry 11-511.4.2 PLL IC Prescaler and ComparatorThe reference frequency from VCT

11-6 403 – 447 MHz UHF1 Theory Of Operation: Keypad11.5 KeypadLeft, Right and P1 to P3 keys are directly connected to microprocessor via 22 Pin connec

Chapter 12 UHF1 Troubleshooting Tables12.1 Troubleshooting Table for Receiver (UHF1) Table 12-1. Troubleshooting Table for Receiver (UHF1)Symptom Pos

12-2 UHF1 Troubleshooting Tables: Troubleshooting Table for Synthesizer (UHF1)12.2 Troubleshooting Table for Synthesizer (UHF1) Table 12-2. Troublesh

UHF1 Troubleshooting Tables: Troubleshooting Table for Transmitter (UHF1) 12-312.3 Troubleshooting Table for Transmitter (UHF1) Table 12-3. Troublesh

viii Table of Contents13.1.1 Notes For All Schematics and Circuit Boards ... 13-113.1.2

12-4 UHF1 Troubleshooting Tables: Troubleshooting Table for Board and IC Signals (UHF1)12.4 Troubleshooting Table for Board and IC Signals (UHF1) Tabl

UHF1 Troubleshooting Tables: Troubleshooting Table for Board and IC Signals (UHF1) 12-5(DTMF decoder) 2 IN- 1.63 GS 1.64Vref 1.68 OSC1 1.6 3.579545 MH

12-6 UHF1 Troubleshooting Tables: Troubleshooting Table for Board and IC Signals (UHF1)Q601 E GND 0B Audio_MUTE_CON Mute: LowNone Mute: HighC Mode Mut

Chapter 13 UHF1 Schematic Diagrams, Overlays, and Parts Lists13.1 IntroductionThis section provides schematic diagrams, overlays, and parts lists for

13-2 UHF1 Schematic Diagrams, Overlays, and Parts Lists: Introduction6. Reference Designators are assigned in the following manner:7. Circuit Block In

UHF1 Schematic Diagrams, Overlays, and Parts Lists: Speaker and Microphone Schematic 13-313.1.2 Four Layer Circuit BoardFigure 13-1. Four–Layer Circu

13-1 Circuit Board/Schematic Diagram and Parts List (UHF1: 403–447 MHz)13.3 Circuit Board/Schematic Diagram and Parts List (UHF1: 403–447 MHz)Figure 1

Circuit Board/Schematic Diagram and Parts List (UHF1: 403–447 MHz) 13-2Figure 13-4. VCO and PLL Schematic Diagram

13-3 Circuit Board/Schematic Diagram and Parts List (UHF1: 403–447 MHz)Figure 13-5. Transmitter Schematic Diagram

Circuit Board/Schematic Diagram and Parts List (UHF1: 403–447 MHz) 13-4Figure 13-6. Microprocessor and Keypad Schematic Diagram

List of Figures ixList of FiguresFigure 2-1. Programming/Test Cable (PMDN4077_R)...

13-5 Circuit Board/Schematic Diagram and Parts List (UHF1: 403–447 MHz)Figure 13-7. Audio Power Amplifier and External Audio Schematic Diagram

Circuit Board/Schematic Diagram and Parts List (UHF1: 403–447 MHz) 13-6Figure 13-8. Switches and Battery Schematic Diagram

13-7 Circuit Board/Schematic Diagram and Parts List (UHF1: 403–447 MHz)Figure 13-9. Transmitter Audio Filter and Sub-tone Schematic Diagram

Circuit Board/Schematic Diagram and Parts List (UHF1: 403–447 MHz) 13-8Figure 13-10. UHF1 (403–447 MHz) Mainboard Top Side: PCB No. 8431BEAUHF300J603C

13-9 Circuit Board/Schematic Diagram and Parts List (UHF1: 403–447 MHz)Figure 13-11. UHF1 (403–447 MHz) Mainboard Bottom Side: PCB No. 8431BEAUHF300AN

Circuit Board/Schematic Diagram and Parts List (UHF1: 403–447 MHz) 13-10Figure 13-12. UHF1 (403–447 MHz) Sub Circuit Board Top View: PCB No. 8421BEACO

13-11 Circuit Board/Schematic Diagram and Parts List (UHF1: 403–447 MHz)Figure 13-13. UHF1 (403–447 MHz) Sub Circuit Board Bottom View: PCB No. 8421BE

Circuit Board/Schematic Diagram and Parts List (UHF1: 403–447 MHz) 13-12Figure 13-14. UHF1 (403–447 MHz) Keypad Board: PCB No. 8422BEACON100MIC1CR110C

13-13 Circuit Board/Schematic Diagram and Parts List (UHF1: 403–447 MHz)13.3.1 Parts ListCircuit Ref.Supplier Supplier Part No. DescriptionC100 TDK N/

Circuit Board/Schematic Diagram and Parts List (UHF1: 403–447 MHz) 13-14C330 TDK N/A Chip Cap,1005 J 47PFC331 TDK N/A Chip Cap,1005 J 20PFC332 MURATA

x List of FiguresFigure 13-4. VCO and PLL Schematic Diagram ...13-2Figur

13-15 Circuit Board/Schematic Diagram and Parts List (UHF1: 403–447 MHz)C512 TDK N/A Chip Cap,1005 K 470PFC515 TDK N/A Chip Cap,1005 Z 0.1μFC516 HITAC

Circuit Board/Schematic Diagram and Parts List (UHF1: 403–447 MHz) 13-16C738. TDK N/A Chip Cap, 1005 D 7PFC739 TDK N/A Chip Cap,1005 K 1nFC740 TDK N/A

13-17 Circuit Board/Schematic Diagram and Parts List (UHF1: 403–447 MHz)F-CABLE1BGTech 8560228005000 SNAGGWA, BEACON FLAT CABLE, FF12-22N080XXAF-CABLE

Circuit Board/Schematic Diagram and Parts List (UHF1: 403–447 MHz) 13-18Q303 NEC N/A 2SC4226 BJT NPN Transis-torQ304 KEC N/A KRA 305 BJT PNP Transisto

13-19 Circuit Board/Schematic Diagram and Parts List (UHF1: 403–447 MHz)R160 KAMAYA N/A Chip Res, 1005 J 47KWR161 KAMAYA N/A Chip Res, 1005 J 47KWR162

Circuit Board/Schematic Diagram and Parts List (UHF1: 403–447 MHz) 13-20R431 KAMAYA N/A Chip Res, 1005 J 10KWR432 KAMAYA N/A Chip Res, 1005 J 27KWR433

13-21 Circuit Board/Schematic Diagram and Parts List (UHF1: 403–447 MHz)Note:1: Not for PMUE3323AALR1001 KAMAYA N/A Chip Res, 1005 J 10KWR1002 KAMAYA

Appendix A Warranty, Service Support, and Replacement PartsA.1 Scope of ManualThis manual is intended for use by service technicians familiar with si

A-2 Warranty, Service Support, and Replacement Parts: Warrantyremedy. THIS WARRANTY IS GIVEN IN LIEU OF ALL OTHER EXPRESS WARRANTIES. IMPLIEDWARRANTIE

Warranty, Service Support, and Replacement Parts: Warranty A-3A.2.5 Patent And Software ProvisionsMOTOROLA will defend, at its own expense, any suit b

List of Tables xiList of TablesTable 1-1. Lead Free Solder Wire Part Number List ...

A-4 Warranty, Service Support, and Replacement Parts: WarrantyA.2.6 Piece PartsSome replacement parts, spare parts, and/or product information can be

Glossary of TermsTerm DefinitionALC Automatic Level Control: a circuit in the transmit RF path that controls RF power amplifier output, provides level

G-2 PLPrivate-Line® tone squelch: a continuous sub-audible tone that is transmitted along with the carrier.PLL Phase-Locked Loop: a circuit in which

© 2009 Motorola Inc. All rights reserved.Motorola Technology Sdn Bhd (Co. No. 455657-H)Plot 2 Bayan Lepas Technoplex Industrial ParkMukim 12 S.W.D1190

xii Notations Used in This Manual Notations Used in This ManualThroughout the text in this publication, you will notice the use of the following notat

Summary of Printed Circuit Boards and Bands Available xiii Summary of Printed Circuit Boards and Bands AvailableTable below lists all the bands availa

xiv Notes

Chapter 1 Maintenance1.0 IntroductionThis chapter of the manual describes:• Preventive maintenance• Safe handling of CMOS devices• Repair procedures a

1-2 Introduction2. Cleaning Internal Circuit Boards and ComponentsIsopropyl alcohol may be applied with a stiff, non-metallic, short-bristled brush t

Introduction 1-3Any rework or repair on Environmentally Preferred Products must be done using the appropriate lead-free solder wire and solder paste

1-4 Introduction• To replace a chip component using a soldering iron: 1. Select the appropriate micro-tipped soldering iron and apply fresh solder to

Chapter 2 Test Equipment, Service Aids, and Service Tools2.1 Test EquipmentTable 2-1 lists test equipment required to service the radios.Table 2-1. R

2-2 Test Equipment, Service Aids, and Service Tools: Service Aids2.2 Service AidsTable 2-2 lists the service aids recommended for working on the EP350

Test Equipment, Service Aids, and Service Tools: Service Aids 2-3Programming/Test CableFigure 2-1. Programming/Test Cable (PMDN4077_R)Figure 2-2. Cl

Notes2-4 Test Equipment, Service Aids, and Service Tools: Service Aids

Chapter 3 DC Power Distribution3.1 DC Regulation and DistributionA block diagram of the DC power distribution throughout the radio is shown in Figure

3-2 DC Power Distribution: DC Regulation and DistributionThe following regulators are used:The 5 V source from U505 is applied to:• RX back end circui

Chapter 4 Controller Theory of Operation4.1 RX Audio CircuitThe RX audio circuit consists of Audio Processor IC, Audio Amplifier, Internal (INT)/Exter

Technical Information UpdatesAs we continue to make engineering enhancements to our products, the information in our Service Manuals need to be update

4-2 Controller Theory of Operation: RX Audio Circuit• De-emphasis: This circuit restores the original state of signal of which high-frequency componen

Controller Theory of Operation: TX Audio Circuit 4-34.2 TX Audio CircuitThe TX audio circuit consists of MIC/External MIC, LPF, Audio processor IC, an

4-4 Controller Theory of Operation: TX Audio Circuit4.2.1 MIC and External MICThe TX audio enters the radio via the internal MIC or the external MIC j

Controller Theory of Operation: Microprocessor Circuitry 4-54.2.4 TX audio amplifier and 6 order 3 kHz Low-Pass filter The TX audio signal from ASIC P

4-6 Controller Theory of Operation: Microprocessor Circuitry4.3.5 Sensing of VOX operatingPort PTT2 (Pin 68) is used to detect the presence of VOX ope

Chapter 5 435 – 480 MHz UHF2 Theory Of Operation5.1 IntroductionThis chapter provides a detailed theory of operation for the radio components. Schemat

5-2 435 – 480 MHz UHF2 Theory Of Operation: UHF2 Receiver5.2.1 Receiver Front EndIncoming RF signals from antenna are first routed through the harmoni

435 – 480 MHz UHF2 Theory Of Operation: UHF2 Transmitter 5-35.3 UHF2 TransmitterThe UHF2 transmitter covers the range of 435 – 480 MHz. Depending on m

5-4 435 – 480 MHz UHF2 Theory Of Operation: UHF2 Frequency Generation Circuitry5.3.4 Auto Power ControlThe APC keeps the current supply constant to th

435 – 480 MHz UHF2 Theory Of Operation: UHF2 Frequency Generation Circuitry 5-55.4.2 PLL IC Prescaler and ComparatorThe reference frequency from VCTCX

Service Manual Feedback FormWe believe that reports from users provide valuable information for producing quality manuals. Kindly take a few moments t

5-6 435 – 480 MHz UHF2 Theory Of Operation: Keypad5.5 KeypadLeft, Right and P1 to P3 keys are directly connected to microprocessor via 22 pin connecto

Chapter 6 UHF2 Troubleshooting Tables6.1 Troubleshooting Table for Receiver (UHF2) Table 6-1. Troubleshooting Table for Receiver (UHF2)Symptom Possib

6-2 UHF2 Troubleshooting Tables: Troubleshooting Table for Synthesizer (UHF2)6.2 Troubleshooting Table for Synthesizer (UHF2) Table 6-2. Troubleshoot

UHF2 Troubleshooting Tables: Troubleshooting Table for Transmitter (UHF2) 6-36.3 Troubleshooting Table for Transmitter (UHF2) Table 6-3. Troubleshoot

6-4 UHF2 Troubleshooting Tables: Troubleshooting Table for Board and IC Signals (UHF2)6.4 Troubleshooting Table for Board and IC Signals (UHF2) Table

UHF2 Troubleshooting Tables: Troubleshooting Table for Board and IC Signals (UHF2) 6-5(DTMF decoder) 2 IN- 1.63 GS 1.64Vref 1.68 OSC1 1.6 3.579545 MHz

6-6 UHF2 Troubleshooting Tables: Troubleshooting Table for Board and IC Signals (UHF2)Q601 E GND 0B Audio_MUTE_CON Mute: LowNone Mute: HighC Mode Mute

Chapter 7 UHF2 Schematic Diagrams, Overlays, and Parts Lists7.1 IntroductionThis section provides schematic diagrams, overlays, and parts lists for th

7-2 UHF2 Schematic Diagrams, Overlays, and Parts Lists: Introduction6. Reference Designators are assigned in the following manner:7. Circuit Block Int

UHF2 Schematic Diagrams, Overlays, and Parts Lists: Speaker and Microphone Schematic 7-37.1.2 Four Layer Circuit BoardFigure 7-1. Four–Layer Circuit

iCOPYRIGHTCopyrights© 2009 by Motorola, Inc. All rights reserved.No part of this manual may be reproduced, transmitted, stored in a retrieval system,

7-4 Circuit Board/Schematic Diagram and Parts List (UHF2: 435–480 MHz)7.3 Circuit Board/Schematic Diagram and Parts List (UHF2: 435–480 MHz)Figure 7-3

Circuit Board/Schematic Diagram and Parts List (UHF2: 435–480 MHz) 7-5Figure 7-4. VCO and PLL Schematic Diagram+5VRX_ENTX_EN1VCO_OUT(TX)C53810nFQ705KR

7-6 Circuit Board/Schematic Diagram and Parts List (UHF2: 435–480 MHz)Figure 7-5. Transmitter Schematic DiagramC431 1nF(1608) C428 6pF(1608) C429 5pF(

Circuit Board/Schematic Diagram and Parts List (UHF2: 435–480 MHz) 7-7Figure 7-6. Microprocessor and Keypad Schematic Diagram+3.3V R194 10K C140 47nF

7-8 Circuit Board/Schematic Diagram and Parts List (UHF2: 435–480 MHz)Figure 7-7. Audio Power Amplifier and External Audio Schematic DiagramC6150.22uF

Circuit Board/Schematic Diagram and Parts List (UHF2: 435–480 MHz) 7-9Figure 7-8. Switches and Battery Schematic DiagramJ602BAT+LED(RED)LED(GREEN)B_S2

7-10 Circuit Board/Schematic Diagram and Parts List (UHF2: 435–480 MHz)Figure 7-9. Transmitter Audio Filter and Sub-tone Schematic Diagram+3.3VR194 1

Circuit Board/Schematic Diagram and Parts List (UHF2: 435–480 MHz) 7-11Figure 7-10. UHF2 (435–480 MHz) Mainboard Top Side: PCB No. 8431BEACON200L602C6

7-12 Circuit Board/Schematic Diagram and Parts List (UHF2: 435–480 MHz)Figure 7-11. UHF2 (435–480 MHz) Mainboard Bottom Side: PCB No. 8431BEACON200ANT

Circuit Board/Schematic Diagram and Parts List (UHF2: 435–480 MHz) 7-13Figure 7-12. UHF2 (435–480 MHz) Sub Circuit Board Top View: PCB No. 8421BEACON1

iiSAFETY INFORMATIONProduct Safety and RF Energy Exposure ComplianceATTENTION!This is restricted to occupational use only to satisfy ICNIRP RF energy

7-14 Circuit Board/Schematic Diagram and Parts List (UHF2: 435–480 MHz)Figure 7-13. UHF2 (435–480 MHz) Sub Circuit Board Bottom View: PCB No. 8421BEAC

Circuit Board/Schematic Diagram and Parts List (UHF2: 435–480 MHz) 7-15Figure 7-14. UHF2 (435–480 MHz) Keypad Board: PCB No. 8422BEACON100MIC1CR110 CR

7-16 Circuit Board/Schematic Diagram and Parts List (UHF2: 435–480 MHz)7.3.1 Parts ListCircuit Ref.Supplier Supplier Part No. DescriptionC100 TDK – Ch

Circuit Board/Schematic Diagram and Parts List (UHF2: 435–480 MHz) 7-17C310 TDK – Chip Cap, 1005 Z 0.1μFC312 TDK – Chip Cap, 1005 J 15PFC318 TDK – Chi

7-18 Circuit Board/Schematic Diagram and Parts List (UHF2: 435–480 MHz)C472 TDK – Chip Cap, 1005 K 470PFC473 TDK – Chip Cap, 1005 J 47PFC501 TDK – Chi

Circuit Board/Schematic Diagram and Parts List (UHF2: 435–480 MHz) 7-19C706 TDK – Chip Cap, 1005 C 3PFC707 TDK – Chip Cap, 1005 D 9PFC709 TDK – Chip C

7-20 Circuit Board/Schematic Diagram and Parts List (UHF2: 435–480 MHz)CR1132BRIGHT LED – LED DIODE, BL-HG036D-TRCR1142BRIGHT LED – LED DIODE, BL-HG03

Circuit Board/Schematic Diagram and Parts List (UHF2: 435–480 MHz) 7-21L406 TAIYOYUDEN – Chip Ind, 1608 220nH JL407 TAIYOYUDEN – Chip Ind, 1005 J 33nH

7-22 Circuit Board/Schematic Diagram and Parts List (UHF2: 435–480 MHz)Q703 NEC – 2SC4226 BJT NPN Transistor Q704 NEC – 2SC4226 BJT NPN Transistor Q70

Circuit Board/Schematic Diagram and Parts List (UHF2: 435–480 MHz) 7-23R190 KAMAYA – Chip Res, 1005 J 15KΩR193 KAMAYA – Chip Res, 1005 J 10KΩR194 KAMA

iiiDOCUMENT HISTORYThe following major changes have been implemented in this manual since the previous edition:Edition Description Date6878422A01-A In

7-24 Circuit Board/Schematic Diagram and Parts List (UHF2: 435–480 MHz)R510 KAMAYA – Chip Res, 1005 J 15KΩR511 KAMAYA – Chip Res, 1005 J 8.2KΩR512 KAM

Circuit Board/Schematic Diagram and Parts List (UHF2: 435–480 MHz) 7-25Note:2: Not for PMUE3144AALSH201 MOTOROLA PMDN4151AR Finger Strip–PairSPK1 BGTe

7-26Notes

Chapter 8 136 – 174 MHz VHF Theory Of Operation8.1 IntroductionThis chapter provides a detailed theory of operation for the radio components. Schemati

8-2 136 – 174 MHz VHF Theory Of Operation: VHF Receiver8.2.1 Receiver Front EndIncoming RF signals from antenna are first routed through the harmonic

136 – 174 MHz VHF Theory Of Operation: VHF Transmitter 8-38.3 VHF TransmitterThe VHF transmitter covers the range of 136 – 174 MHz. Depending on model

8-4 136 – 174 MHz VHF Theory Of Operation: VHF Frequency Generation Circuitry8.3.4 Auto Power ControlThe APC keeps the current supply constant to the

136 – 174 MHz VHF Theory Of Operation: VHF Frequency Generation Circuitry 8-58.4.2 PLL IC Prescaler and ComparatorThe reference frequency from VCTCXO

8-6 136 – 174 MHz VHF Theory Of Operation: Keypad8.5 KeypadLeft, Right and P1 to P3 keys are directly connected to microprocessor via 22 pin connector

Chapter 9 VHF Troubleshooting Tables9.1 Troubleshooting Table for Receiver (VHF) Table 9-1. Troubleshooting Table for Receiver (VHF)Symptom Possible

iv Notes

9-2 VHF Troubleshooting Tables: Troubleshooting Table for Synthesizer (VHF)9.2 Troubleshooting Table for Synthesizer (VHF) Table 9-2. Troubleshooting

VHF Troubleshooting Tables: Troubleshooting Table for Transmitter (VHF) 9-39.3 Troubleshooting Table for Transmitter (VHF) Table 9-3. Troubleshooting

9-4 VHF Troubleshooting Tables: Troubleshooting Table for Board and IC Signals (VHF)9.4 Troubleshooting Table for Board and IC Signals (VHF) Table 9-4

VHF Troubleshooting Tables: Troubleshooting Table for Board and IC Signals (VHF) 9-5(DTMF decoder) 2 IN- 1.63 GS 1.64Vref 1.68 OSC1 1.6 3.579545 MHz i

9-6 VHF Troubleshooting Tables: Troubleshooting Table for Board and IC Signals (VHF)Q601 E GND 0B Audio_MUTE_CON Mute: LowNone Mute: HighC Mode Mute:

Chapter 10 VHF Schematic Diagrams, Overlays, and Parts Lists10.1 IntroductionThis section provides schematic diagrams, overlays, and parts lists for t

10-2 VHF Schematic Diagrams, Overlays, and Parts Lists: Introduction6. Reference Designators are assigned in the following manner:7. Circuit Block Int

VHF Schematic Diagrams, Overlays, and Parts Lists: Speaker and Microphone Schematic 10-310.1.2 Four Layer Circuit BoardFigure 10-1. Four–Layer Circui

10-1 Circuit Board/Schematic Diagram and Parts List (VHF: 136–174 MHz)10.3 Circuit Board/Schematic Diagram and Parts List (VHF: 136–174 MHz)Figure 10-

Circuit Board/Schematic Diagram and Parts List (VHF: 136–174 MHz) 10-2Figure 10-4. VCO and PLL Schematic Diagram+5V+5VR701++++100RC710C70910pFTZY02

Table of Contents vTable of ContentsCopyright ...

10-3 Circuit Board/Schematic Diagram and Parts List (VHF: 136–174 MHz)Figure 10-5. Transmitter Schematic DiagramANT 1 ANT 1 2 C431 1nF(1608) R41

Circuit Board/Schematic Diagram and Parts List (VHF: 136–174 MHz) 10-4Figure 10-6. Microprocessor and Keypad Schematic DiagramQ4 Q3 Q2 Q1 STD U106_SW

10-5 Circuit Board/Schematic Diagram and Parts List (VHF: 136–174 MHz)Figure 10-7. Audio Power Amplifier and External Audio Schematic DiagramAUDIO_INA

Circuit Board/Schematic Diagram and Parts List (VHF: 136–174 MHz) 10-6Figure 10-8. Switches and Battery Schematic Diagram+3.3VRX_AF2B_S211111112121010

10-7 Circuit Board/Schematic Diagram and Parts List (VHF: 136–174 MHz)Figure 10-9. Transmitter Audio Filter and Sub-tone Schematic DiagramR508 1KC568

Circuit Board/Schematic Diagram and Parts List (VHF: 136–174 MHz) 10-8Figure 10-10. Receiver Audio Filter and Sub-tone Schematic DiagramC191220pFC6020

10-9 Circuit Board/Schematic Diagram and Parts List (VHF: 136–174 MHz)Figure 10-11. VHF (136–174 MHz) Mainboard Top Side: PCB No. 8431BEACON400J603C62

Circuit Board/Schematic Diagram and Parts List (VHF: 136–174 MHz) 10-10Figure 10-12. VHF (136–174 MHz) Mainboard Bottom Side: PCB No. 8431BEACON400ANT

10-11 Circuit Board/Schematic Diagram and Parts List (VHF: 136–174 MHz)Figure 10-13. VHF (136–174 MHz) Sub Circuit Board Top View: PCB No. 8421BEACON1

Circuit Board/Schematic Diagram and Parts List (VHF: 136–174 MHz) 10-12Figure 10-14. VHF (136–174 MHz) Sub Circuit Board Bottom View: PCB No. 8421BEAC