Tait Orca 5000 Service Manual

Also see for Orca 5000: User manual

Contents

vi June 2003 IPN: M5000-00-105TOP-Jxxxx 806-870MHz radio specifications...................................................................................... B-11TOP-Kxxxx 896-941MHz radio specifications .................................................................................... B-12Circuit descriptionsCircuit descriptionsCircuit descriptionsCircuit descriptions .................................................................................................................................................................................................................................................................................................................................................................................................................................................................... B-13B-13B-13B-13Transmitter ........................................................................................................................................ B-13Transmit (Tx) audio ........................................................................................................................... B-13Receiver .............................................................................................................................................. B-13Receive (Rx) audio .............................................................................................................................. B-13DSP .................................................................................................................................................... B-14Synthesiser and VCO .......................................................................................................................... B-14Power supplies ................................................................................................................................... B-14Accessory connector interface ............................................................................................................ B-15Universal band versus wideband IF filtering ...................................................................................... B-15Part C: Diagnostics and fault findingTest facilitiesTest facilitiesTest facilitiesTest facilities .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... C-3C-3C-3C-3Error codes ........................................................................................................................................... C-3Test commands..................................................................................................................................... C-5Calculating the parameters required for test command 101................................................................. C-7Fault finding chartsFault finding chartsFault finding chartsFault finding charts ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................ C-8C-8C-8C-8Radio cannot be switched on ................................................................................................................ C-9Cannot change channel ...................................................................................................................... C-10No serial communication ................................................................................................................... C-11Receive faults ...................................................................................................................................... C-12Cannot transmit ................................................................................................................................. C-13No transmit audio .............................................................................................................................. C-14Part D: Servicing the radioServicing the radioServicing the radioServicing the radioServicing the radio ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................ D-3D-3D-3D-3Screw head types ..................................................................................................................................D-3Disassembling the radioDisassembling the radioDisassembling the radioDisassembling the radio ........................................................................................................................................................................................................................................................................................................................................................................................................................................ D-4D-4D-4D-4Removing the front panel from the chassis ..........................................................................................D-4Removing the shield sub-assembly from the chassis ............................................................................D-5Removing the PCB from the chassis .....................................................................................................D-6Removing the rear panel ......................................................................................................................D-7Replacing key mechanical and ancillary devicesReplacing key mechanical and ancillary devicesReplacing key mechanical and ancillary devicesReplacing key mechanical and ancillary devices ........................................................................................................................................................................................................................................................................................ D-8D-8D-8D-8Replacing the lens (Orca 5015/2x/35/40) ...........................................................................................D-8Replacing the PTT keypad ....................................................................................................................D-8Replacing the speaker ...........................................................................................................................D-9