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Table of Contents

Instruction for PR65003
Equipment Needed4
Using the Software4
Index5
Introduction6
Electronics Pcb's6
Mechanical Components6
Selcall Compatible Versions of the RT65006
List of Current Product Variants7
Operating the RT65008
Assembly/Disassembly Instructions9
Radio Disassembly9
Fistmike Disassembly9
Handset Disassembly9
RT6500 Circuit Description10
Control P.C.B.10
Rx/Tx PCB (E00425)11
Synthesizer11
Voltage Supplies11
Modulation11
Transmit Amplification12
Power Controls12
Receiver Front End/ Mixer and 1St I.F.12
2Nd I.F. Demodulation and Audio12
RT6500 Block Diagram13
Squelch14
Setup Procedure14
BD6500 Circuit Description14
RT6500 Control P.C.B. Circuit Diagram16
Configuration and Programming17
Private Channel Programming for the RT6500S17
Entering Programming Mode17
Selecting Channel Number18
Entering a Frequency18
Selecting the Mode of Operation19
Terminating the Programming Mode19
Extended Programming Mode B19
Private Channel Enable Position (Pad3)20
Entering the Calling Number21
Test Mode21
Circuit/Mechanical Assembly Drawings22
PCB Circuit Diagrams22
Parts Lists and Circuit Layout22
Mechanical Assembly Drawings22
RT6500/RT6500S Components List23
RT6500 RX/TX Circuit Diagram E00425. PCB Assembly E0183123
Semiconductor Devices23
Minimum Spares Stockholding27
Product Variations28
Historical List of Modifications28
Tuning Components in the VCO28
Power Control28
RX-TX Switching29
IF Amplifier29
On Units with Boards Dated 1988 and Used on29
Increased Frequency Range TX30
Line Borne Audio Interference31
Surface Mount Technology Front Panel PCB31
Detailed Changes Pre-Version B31
Version B (from IC26724)32
Historical List of Software Modifications33
Trouble Shooting Guide35
Update Sheets36
RT6500 RX/TX P.C.B. Circuit Diagram39
Circuit Diagram: RT6500 Front Panel, RT6500 Version 241
View of Rear of Connector47
PIN Function49
Circular Connector/Pin Function53
Connector Terminal53
Cable Prep Ref. E0045253
Assembly of Lamps53

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