Maxon Telecom SP210, SP200 service manual Troubleshooting Chart, If IC

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Maxon SP200/210 Radio

SP200/210

6.2 Troubleshooting Chart

Symptoms	Causes			Remedy
Radio does not work	1.	Battery is discharged	1.		Replace battery
		(below 6V =/-10%)
	2.	Fuse blown	2.		Replace Fuse
	3.	5V supply missing	3.		Check IC5 (5V +/-0.2V)
Warning Tone and	1.	PLL error	1.		Check TCXO/VCO/PLL IC
radio does not work	2.	EEPROM failure			freqs programmed
	3.	Low battery	2.		Re-program
			3.		Replace, or charge, battery
Poor Rx sensitivity	1.	Defective Antenna switch	1.		Check D5 & D6
(-10 to –60dBm)	2.	Defective front-end	2.		Check front end
	3.	Defective mixer	3.		Check D9, T1 & T2
	4.	IF IC	4.		Check X1, CF1/CF2 & IC5
	5.	VCO output level	5.		Check Rx VCO level >+1.2dBm
	6.	LO frequency	6.		Retune TCXO
Defective Rx	1.	VCO frequency change or drop		1.	Repair VCO
		in level			Defective IF IC (IC1)
	2.	Defective voltage source		2.	Check IC1
PLL Error	1.	Defective 12.8MHz TCXO		1.	Replace TCXO
	2.	Voltage source for Rx VCO / Tx		2.	Check Rx VCO / Tx VCO
		VCO		3.	Replace IC2. Check DC/DC
	3.	Defective PLL			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

TROUBLESHOOTING	Issue 1.0
Page 6-2	03/01

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Contents SP200/210 NSW Australia Tel +61 0 2 9707 Amendment Record Sheet Issue No Effective Date Reason for Change SignatureAmendment Record Sheet Maxon SP200/210 Radio Table of Contents SL100 UHF Parts List 11.4 Default Settings 11-810-1 11-1List of Tables Maxon SP200/210 Radio Issue 03/01 Using this Manual IntroductionAmendments to this Manual Category C Engineering BulletinContact Information Specifications GeneralEnvironmental Operating Temperature Range Physical Dimensions SynthesiserVibration ESD EMCPre-Install Check Accessories Accessories & OptionsOptions Accessories & Options INSTALLATION, Commissioning & Alignment InstallationINSTALLATION, Commissioning & Alignment ConnectionsCommissioning Recommended Test EquipmentCommissioning Equipment Commissioning KitTest Equipment Set-up using Discrete Test Equipment Discrete Test EquipmentSK 3100 Service Kit Transmitter Performance Tests Test Equipment ConnectionReceiver Performance Tests Squelch Power AdjustmentAudio Output Tests without Disassembly AlignmentPreparation VHFRemoving and Replacing Battery Disassembly and Re-assembly of the RadioRemoving and Replacing the Belt Clip Location of Adjustment Points Removing and Replacing the Main AssemblyPLL Alignment Transmitter Alignment Squelch SensitivityTcxo Radiocommunications Test SET Audio deviation adjustment Balance AdjustmentCtcss / DCS deviation At maximum volume, nominal distortion is 10% Audio Volume LevelReceiver Alignment Detailed Functional Description IntroductionCommon Circuits EepromAudio Signal Path Audio AsicSat Signal Path Miscellaneous Signals and ControllerAudio/SAT Circuits Battery Low Indicator Circuit LEDs and indicatorsCommon RF Circuits PLL SynthesiserPLL IC Out-of-Lock DetectorCharge Pump and Loop Filter DC to DC ConverterAntenna Switch Automatic power control APC circuitsTransmitter PA moduleReceiver Front EndFirst Mixer Second mixer, Second IF, FM detectorSquelch Mute Circuit 16kHz Band Pass FilterAF Output Low Pass Filter Noise detector circuitSpeaker Audio Amplifier Troubleshooting Diagnostic FunctionDiagnostics TroubleshootingTroubleshooting Chart If ICTransistors Main Circuit Voltage ChartsMain Circuit Transistor Voltages Integrated Circuit Voltages Receive Integrated CircuitsIntegrated Circuit Voltages Transmit Troubleshooting Troubleshooting Troubleshooting Troubleshooting Programming SMP6100Introduction Getting StartedSelect Features Menu ScanningProgram/Print/Save Program RadioPrint Data Save Data to DiskMaxon SP200/200 Radio SP200/210 Exploded Mechanical Drawings & Parts Lists Parts ListExploded Mechanical Drawings & Parts Lists Spare PartsSL100U2 SL100V2Mechanical Parts For details on servicing, please refer to SectionParts List for Exploded Mechanical Drawing LCD TTR 1866 DpfdpwPCB LCD SKPT-110VASML-020MLTT86 SMD NUT M7 BsbmPCB VCO PCB RF Aldc Bsbm M2.6V2 Control Circuit SL100 VHF Parts List05B-000-5Z Diode Switching KDS181S A3 Chip Ceramic 0.001UF GRM39 X7R102K 50V PChip Ceramic 0.012UF GRM39 X7R123K 25V P Chip Ceramic 0.0022UF GRM39 X7R222J 50V P2 V2 RF SW Tact SKPT-1101VARES.CHIP Trimmer 1K RH03E1C13X RES.CHIP Trimmer 10K RH03E1C14XThermistor Chip 33KNTCCS32163SH333KC TH1 Elect Capacitor 10UF 16V 20%RE Power Module GNOK-M68776-E01 IC9 Chip Ceramic 39PF GRM40 COG390J 50V PChip Ceramic 43PF GRM40 COG430J 50V P Chip Ceramic 47PF GRM39 COG470J 50V PTcxo Assembly 4 V2 VCO 5 V2 Front EndSL100 UHF Parts List U2 Control CircuitConnector Waffer 2 U2 RF Chip Resistor 12KChip Resistor 18K Chip Resistor 39KRES.CHIP Trimmer K RH03E1C13X Chip Ceramic 0.0015UF GRM39 X7R152K 50V PChip Ceramic 10PF GRM40 COG100C 50V P Chip CeramicPower Mpduleuhf M68732HGNOK IC9 Chip Ceramic 2.2PF GRM40 COG2R2C 50V PChip Ceramic 470PF GRM40 COG471J 50V P Chip Ceramic 4.7PF GRM40 COG4R7C 50V PTcxo Coil Chip 18NHLL2012-F18NMCoil Spring X0.35X7TR Coil Spring 2X0.75X3TL SMD4 VCO Maxon SP200/210 Radio Circuit Diagrams & PCB Layouts Circuit Diagrams & PCB LayoutsRF PCB TcxoCircuit Diagrams & PCB Layouts Digital Board Layout Top Side Digital Board Layout Bottom Side RF Board Layout Top Side Issue RF Board Layout Bottom Side P406787a Front End Front-End Board Layout Tcxo Board Layout 10SPARE Parts Spare Parts & Maintenance Policy10.1Spare Parts Component Replacement Surface mount component replacementSurface mount components Surface mount removalSurface mounted integrated circuit replacement Spare Parts & Maintenance Policy 11APPENDIX ACC-2003 Alignment BOX 11.1Purpose11.2Test Equipment 11.3Calibration ProgramCalibration Program Primary Screen Appendix a ACC-2003 Alignment BOXAsic Control Screen Rx TXTRIM2 Adjustment of Asic valuesTXTRIM3 RX VOL SAT Balance Transmit AdjustmentsSAT Deviation Receive Adjustments Audio Output Level11.4Default Settings 11.4.1 V1 Band Default SettingsV1 Default Frequency Table V1 Default Asic SettingsV2 Default Frequency Table 11.4.2 V2 Band Default SettingsV2 Default Asic Settings U1 Default Frequency Table 11.4.3 U1 Band Default SettingsU1 Default Asic Settings U2 Default Frequency Table 11.4.4 U2 Band Default SettingsU2 Default Asic Settings