Tait Orca series - Page 81

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11/98 IPN: 449-51000-01 Interfacing non-Tait accessories F - 9

Figure F-5: Circuit diagram of the 7.5 mm accessory adaptor PCB for handportables

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Servicing Tait Orca Handportables9
What Does this Manual Contain9
What Is Included in the Calibration Service Kit9
Programming Service Kits10
The Tait Orca Series of Handportables11
Product Codes11
Operating Instructions11
Fitting an Accessory12
Fitting a Non-Tait Accessory12
Basic Servicing Precautions14
Radio Specifications and Circuit Descriptions17
Radio Specifications19
Circuit Descriptions22
Transmit (Tx) Audio22
Receive (Rx) Audio23
Power Supplies23
Synthesiser and VCO23
Accessory Connector Interface24
Implications of Narrowband Versus Wideband if Filtering24
Diagnostics and Fault Finding25
Test Facilities27
Error Codes27
Fault Finding Charts32
Servicing the Radio39
Screw Head Types41
Disassembling the Radio42
Removing the Front Panel from the Chassis42
Removing the Shield from the Chassis43
Removing the PCB from the Chassis44
Removing the Rear Panel45
Replacing Key Mechanical and Ancillary Devices46
Replacing the Lens (Orca Excel and Orca Eclipse)46
Replacing the PTT Keypad46
Replacing the LCD Display (Orca Excel and Orca Eclipse)47
Replacing the Speaker47
Replacing the Shield, User Interface PCB Assembly and Polyester Dome (Orca Excel and Orca Eclipse)50
Replacing the Battery and Speaker Contacts50
Replacing the Microphone50
Replacing the Tact Switch50
Reassembling the Radio51
Rear Panel Reassembly and Replacing the Auxiliary Flexible PCB51
Fitting the PCB to the Chassis and Replacing the RF out Assembly52
Fitting the Shield to the Chassis52
Fitting the Front Panel to the Chassis53
Spares Kits54
Battery Packs and Chargers59
Battery Packs61
Battery Life61
Extending Battery Life62
Disposing of Used Nickel-Cadmium Batteries62
Battery Chargers63
Desktop Fast Charger64
Hardware Operation64
Fast Charger Operation64
Software Operation66
Using the Fast Charger67
Charging the Battery Using the Fast Charger67
Repairing the Fast Charger68
Reassembling the Charger69
Desktop Trickle Charger70
Trickle Charger Operation70
Using the Trickle Charger71
Repairing the Trickle Charger71
Multi-Charger Operation72
Tait Orca Accessory Connector75
Accessory Function Buttons77
Accessory Power77
Connecting an Accessory78
Mechanical Assembly Procedure78
MM Accessory Adaptor80
Additional Information83
Conventional Mode85
Programming Mode87
Receive Mode87
Test Mode88
Tait Electronics Limited Software Licence Agreement89
Term and Termination89
Limited Warranty89
Exclusion of Liability90

Tait Orca series - Page 81

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