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General| Frequency Range | 136-174 MHz |
|---|---|
| Operating Temperature | -30°C to +60°C |
| Waterproof | IP54 |
| Channel Capacity | 128 channels |
| Modulation | FM |
Service manual details latest technical info for VHF mobile transceivers.
Important safety and handling precautions for the transceiver.
Procedures for ordering parts and guidelines for transceiver repair.
Covers general technical specs like frequency, impedance, power, dimensions, and weight.
Details transmitter parameters like emission type, deviation, frequency error, and audio.
Outlines receiver metrics like sensitivity, selectivity, spurious response, and audio output.
Identifies components and ICs on the top side of the front unit PCB.
Labels components and ICs on the top side of the main unit PCB.
Identifies components and ICs on the bottom side of the main unit PCB.
Provides a step-by-step guide for disassembling the transceiver unit.
Details installation steps for optional units like UT-108, OPC-1939, UT-109R, UT-110R.
Explains the RF signal path and intermediate frequency stages.
Describes audio frequency circuits, amplification, and tone decoding.
Details mic amp, TX AF circuits, and modulation methods.
Describes VCOs, PLL, and overall voltage distribution.
Lists pin assignments for CPU, expander, and D/A converters.
Lists required equipment and jig cable setup for adjustments.
Details steps for adjusting frequency parameters and PLL lock voltage.
Outlines procedures for adjusting output power, modulation balance, and deviation.
Details how to adjust receive sensitivity, S-meter, and squelch.
Lists all part numbers and descriptions for the main unit.
Lists all part numbers and descriptions for the front unit.
Details mechanical components, chassis parts, and assembly diagrams.
Shows component placements on the top side of the main and front unit PCBs.
Shows component placements on the bottom side of the main and front unit PCBs.
Illustrates overall wiring and pinouts for connectors and optional cables.
Provides a high-level functional block diagram of the transceiver's internal circuitry.
Details voltage levels and distribution within the front and main units.
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