Maxon Telecom SP210, SP200 service manual PLL Alignment, Removing and Replacing the Main Assembly

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Maxon SP200/210 Radio

SP200/210

REMOVING AND REPLACING THE MAIN ASSEMBLY

Removal

With the battery pack removed, there are four, black, cross-head screws visible.

These can now be removed along with the black, cross head screw holding the accessories socket dust cover.

Unscrew the antenna and slide off the volume control knob.

Replace the battery but do not push all of the way home. Gripping the lower sides of the battery, and the lower sides of the radio lever the two apart at the bottom of the radio to separate the two.

Withdraw the module from the case.

Remove the battery from the module.

This level of disassembly will be enough for test purposes.

Note: A screwdriver, or similar object, should never be used to force open the radio as the sealing gasket is likely to be damaged.

To reassemble the radio, carry out the above instructions in reverse, ensuring that the seal is pushed down into the cover. Take care not to damage the sealing gasket.

With the two parts of the radio separated, for servicing, it will be necessary to link the two pcbs using the flexi-pcb ME110016, which is part of the Service Kit.

LOCATION OF ADJUSTMENT POINTS

C208 L203

TCXO

TP1

RF PCB

Figure 4-14 – Adjustment Points

4.5.3 PLL Alignment

Before any alignment is carried out to the transmitter, or receiver, it is necessary to align the Phase Locked Loop (PLL). The PLL consists of the Rx VCO, Tx VCO and TCXO.

If the PLL is out of lock, an audible warning will be heard UL will appear on the LCD display.

Note: This alert will also be heard when a channel is programmed out of the range of operation of the radio, or it is not programmed at all.

Note: If the power save parameter is programmed there will be a periodic change at TP1. Measurement should be based on the steady state voltage, with power save off.

In order to carry out repairs, the two halves of the radio may need to be linked using the flexi- pcb, ME110016.

This is part of the Service Kit and the Interface Box and leads will also be required for some of the tests.

Connect the radio under test to the Test Equipment.

INSTALLATION, COMMISSIONING & ALIGNMENT -	Issue 1.0
Page 4-10	03/01

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Contents SP200/210 NSW Australia Tel +61 0 2 9707 Issue No Effective Date Reason for Change Signature Amendment Record SheetAmendment 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 EMCAccessories & Options Pre-Install Check AccessoriesOptions 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 Test Equipment Connection Transmitter Performance TestsReceiver Performance Tests Power Adjustment SquelchAudio Output Tests without Disassembly AlignmentPreparation VHFDisassembly and Re-assembly of the Radio Removing and Replacing BatteryRemoving and Replacing the Belt Clip Removing and Replacing the Main Assembly Location of Adjustment PointsPLL Alignment Squelch Sensitivity Transmitter AlignmentTcxo Radiocommunications Test SET Balance Adjustment Audio deviation adjustmentCtcss / DCS deviation Audio Volume Level At maximum volume, nominal distortion is 10%Receiver 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 FilterNoise detector circuit AF Output Low Pass FilterSpeaker Audio Amplifier Troubleshooting Diagnostic FunctionDiagnostics TroubleshootingTroubleshooting Chart If ICVoltage Charts Transistors Main CircuitMain Circuit Transistor Voltages Integrated Circuits Integrated Circuit Voltages ReceiveIntegrated 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 M2.6SL100 VHF Parts List V2 Control Circuit05B-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 Spare Parts & Maintenance Policy 10SPARE Parts10.1Spare 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 Adjustment of Asic values TXTRIM2TXTRIM3 RX VOL Transmit Adjustments SAT BalanceSAT Deviation Receive Adjustments Audio Output Level11.4Default Settings 11.4.1 V1 Band Default SettingsV1 Default Frequency Table V1 Default Asic Settings11.4.2 V2 Band Default Settings V2 Default Frequency TableV2 Default Asic Settings 11.4.3 U1 Band Default Settings U1 Default Frequency TableU1 Default Asic Settings 11.4.4 U2 Band Default Settings U2 Default Frequency TableU2 Default Asic Settings