Maxon Telecom SP200, SP210 6.2 Troubleshooting Chart

Maxon SP200/210 Radio SP200/210

TROUBLESHOOTING Issue 1.0

Page 6-2 03/01

6.2 Troubleshooting Chart

Symptoms Causes Remedy

Radio does not work 1. Battery is discharged

(below 6V =/-10%)

2. Fuse blown

3. 5V supply missing

1. Replace battery

2. Replace Fuse

3. Check IC5 (5V +/-0.2V)

Warning Tone and

radio does not work 1. PLL error

2. EEPROM failure

3. Low battery

1. Check TCXO/VCO/PLL IC

freqs programmed

2. Re-program

3. Replace, or charge, battery

Poor Rx sensitivity

(-10 to –60dBm) 1. Defective Antenna switch

2. Defective front-end

3. Defective mixer

4. IF IC

5. VCO output level

6. LO frequency

1. Check D5 & D6

2. Check front end

3. Check D9, T1 & T2

4. Check X1, CF1/CF2 & IC5

5. Check Rx VCO level >+1.2dBm

6. Retune TCXO

Defective Rx 1. VCO frequency change or drop

in level

2. Defective voltage source

1. Repair VCO

Defective IF IC (IC1)

2. Check IC1

PLL Error 1. Def ective 12.8MHz TCXO

2. Voltage source for Rx VCO / Tx

VCO

3. Defective PLL

1. Replace TCXO

2. Check Rx VCO / Tx VCO

3. Replace IC2. Check DC/DC

converter

Low / No Tx power 1. Tx Amp 1. Check Q9, IC9 & power control

loop

No modulation 1. Audio ASIC 1. Check IC406

No programming 1. Defective programming lead

2. Check accessories connector.

Table 6-2 – Troubleshooting chart

Contents

Main Page Page Page TABLE OF CONTENTS 1 INTRODUCTION 1-1 2 SPECIFICATIONS 2-1 3 ACCESSORIES & OPTIONS 3-1 4 INSTALLATION, COMMISSIONING & ALIGNMENT 4-1 8 EXPLODED MECHANICAL DRAWINGS & PARTS LISTS 8-1 9 CIRCUIT DIAGRAMS & PCB LAYOUTS 9-1 10 SPARE PARTS 10-1 11 APPENDIX ACC-2003 ALIGNMENT BOX 11-1 LIST OF FIGURES LIST OF TABLES Page 1 INTRODUCTION 1.1 Using this Manual 1.2 Amendments to this Manual 1.3 Contact Information 2 SPECIFICATIONS 2.1 General Page 3 ACCESSORIES & OPTIONS 3.1 Pre-Install Check 3.2 Accessories 3.3 Options Page 4 INSTALLATION, COMMISSIONING & ALIGNMENT 4.1 Installation 11 12 4.2 Connections 4.3 Commissioning Page Page Page 4.3.1 Test Equipment Connection 4.3.2 Transmitter Performance Tests 4.3.3 Receiver Performance Tests 4.4 Power Adjustment PowerSquelch 4.5 Alignment 4.5.1 Preparation 4.5.2 Disassembly and Re-assembly of the Radio RF PCB 4.5.3 PLL Alignment 4.5.4 Squelch Sensitivity 4.5.5 Transmitter Alignment RADIOCOMMUNICATIONS TEST SET Page 4.5.6 Receiver Alignment 5 DETAILED FUNCTIONAL DESCRIPTION 5.1 Introduction 5.2 Common Circuits 5.3 Audio ASIC 5.3.1 Audio Signal Path 5.3.2 Sat Signal Path 5.3.3 Miscellaneous Signals and Controller 5.4 Audio/SAT Circuits 5.5 Common RF Circuits ~ Page 5.6 Transmitter 5.7 Receiver ~ Page Page 6 TROUBLESHOOTING 6.1 Diagnostic Function 6.2 Troubleshooting Chart 6.3 Voltage Charts 6.3.1 Transistors (Main Circuit) Maxon SP200/210 Radio SP200/210 TROUBLESHOOTING Issue 1.0 Page 6-4 03/01 6.3.2 Integrated Circuits Table 6-5 - Integrated Circuit Voltages (Transmit) Receive Table 6-4 - Integrated Circuit Voltages (Receive) Transmit Page Page Page Page 7 PROGRAMMING 7.1 SMP6100 7.1.1 Introduction 7.1.2 Getting Started 7.1.3 Programming Page Page Page 8 EXPLODED MECHANICAL DRAWINGS & PARTS LISTS 8.1 Parts List 8.2 Spare Parts Page Page Page Page Page Page 8.4 SL100 VHF Parts List 8.4.1 V2 Control Circuit Page 8.4.2 V2 RF Page Page 8.4.3 TCXO Assembly 8.4.4 V2 VCO 8.4.5 V2 Front End 8.5 SL100 UHF Parts List 8.5.1 U2 Contr o l Circuit Page 8.5.2 U2 RF Page Page 8.5.3 TCXO 8.5.4 VCO Page 9 CIRCUIT DIAGRAMS & PCB LAYOUTS Page Page Page Page Page Page Page 10 SPARE PARTS 10.1 Spare Parts 10.1.1 Component Replacement Page Page 11 APPENDIX ACC-2003 ALIGNMENT BOX 11.1 Purpose 11.2 Test Equipment 11.3 Calibration Program 11.3.1 Operation Page Page 11.3.2 Adjustment of ASIC values Page 11.3.3 Transmit Adjustments 11.3.4 Receive Adjustments 11.4 Default Settings 11.4.1 V1 Band Default Settings 11.4.2 V2 Band Default Settings 11.4.3 U1 Band Default Settings 11.4.4 U2 Band Default Settings