The Kenwood TR-3500 service manual provides detailed instructions on setting up and operating the 70 cm FM synthesized hand-held transceiver, including specifications for frequency range, power requirements, and antenna impedance. It also includes troubleshooting information, such as circuit descriptions for both the receiver and transmitter sections, and diagrams for disassembly and parts identification.
Manual Overview
The Kenwood TR-3500 service manual provides comprehensive guidance for technicians on troubleshooting, diagnostics, and calibration of the 70 cm FM synthesized hand-held transceiver. The manual outlines a dual conversion superheterodyne receiver with a first IF frequency of 21.6 MHz and a second IF frequency of 455 kHz. Troubleshooting involves checking the RF amplifier stages and local oscillator signals, with specific attention to the squelch circuit controlled by the MC3359P IC. Error diagnostics focus on the PLL unit, where the MC145156P IC manages frequency synthesis and phase locking. Calibration requires adjustments to the VCO and peaking circuits to ensure proper frequency response. Board-level guidance includes detailed circuit descriptions, schematic diagrams, and component specifications, such as the use of 2SC2026 transistors in the RF amplifier and 2SC2283M in the power amplifier. The manual emphasizes maintaining frequency stability and minimizing spurious emissions through precise component alignment and testing procedures.
Quick Issues Covered
- Diagnose power-up failures with detailed circuit tracing instructions.
- Calibrate frequency deviations using PLL unit adjustments.
- Troubleshoot receiver sensitivity issues with squelch circuit diagnostics.
Overview
The Kenwood TR-3500 is a 70 cm FM synthesized hand-held transceiver. The service manual covers various models including TR 3500 BT-1, MS-1, PB-25, SC-4, ST-2, SMC-25, TU-35A/TU-35B, and TU-1. It provides detailed specifications, circuit descriptions, parts lists, disassembly instructions, packing information, PC board views, level diagrams, reference data, block diagrams, and schematic diagrams for different models. The manual includes information on both the receiver and transmitter sections, as well as the PLL section.
Specifications
- Weight: With Ni-Cd battery: 540 g (1.2 lbs.)
- Frequency Range: 440.000 – 449.995 MHz (K, M1, M3), 430.000 – 439.995 MHz (M2, M4, T, W, X)
- RF Output Power: Hi= 1.5 W, LOW =0.3 W approx.
- Frequency Step: 5 kHz
- Memory Channels: 10 CH
- Modulation: Variable reactance direct shift
- Frequency Tolerance: Less than + 20x 10^-7
- Operating voltage: 8.4 VDC + 25%
- Power Requirement: 8.4 V, 400 mAH (Ni-Cd battery pack), 9V AA manganese or alkaline (not Ni-Cd)
- Back-up Power Requirement: CR2032 Lithium battery (supplied)
- Current Drain: Approx 35 mA in receive mode with no input signal, Approx 700 mA in HI transmit mode (at 8.4V), Approx. 350 mA in Low transmit mode (at 8.4V), Approx 1A for memory back-up
- Grounding: Negative
- Operating Temperature: -10°C to +50°C
- Antenna impedance: 50 ohms
- Semiconductors: Microcomputer 1, ICs 6, Transistors 49 (KM, X), 52 (T, W), Diodes 45 (K, M, X), 43 (T, W), 41
- LED: 1
- Dimensions: With Ni-Cd battery: 66 (2.6) W x 168 (6.7) H x 40 (1.6) D mm (inch), With manganese battery: 66 (2.6) W x 176 (7.0) H x 40 (1.6) D mm (inch)
Controls & Indicators
Refer to the PDF for details.
Installation / Setup
Refer to the PDF for details.
Operation
Refer to the PDF for details.
Troubleshooting & Error Codes
Refer to the PDF for details.
Safety & Warnings
Refer to the PDF for details.
Download MANUAL Service manual (PDF – 8.8 MB)
Kenwood TR-3500 Service Manual PDF (8.8 MB): Guide for technicians to troubleshoot, repair, and maintain Kenwood TR-3500 devices efficiently.
- Brand: Kenwood-tr-3500-service
- Model: MANUAL
- Type: Service manual
- File size: 8.8 MB
Overview
Brief overview of the product.
Specifications
- Key spec 1
- Key spec 2
Controls & Indicators
Control panel/button layout.
Installation / Setup
- Step 1…
- Step 2…
Operation
Basic usage, modes, cycles.
Troubleshooting & Error Codes
| Issue / Code | Fix |
|---|---|
| Example | How to fix… |
Safety & Warnings
- Important warning…
Downloads
Download MANUAL service manual (PDF)
Kenwood TR-3500 Service Manual Overview
The Kenwood TR-3500 is a reliable and versatile handheld transceiver designed for amateur radio enthusiasts and professional communication users. This device offers clear voice transmission and reception across UHF frequencies, making it ideal for both personal and emergency communication needs. The service manual provides detailed instructions for maintenance, repair, and optimal operation of the Kenwood TR-3500, ensuring long-lasting performance and reliability.
Main Features and Specifications
- Frequency Range: UHF 450-490 MHz
- Power Output: 5 Watts (adjustable)
- Channel Capacity: 128 programmable memory channels
- Battery Type: Rechargeable NiMH battery pack
- Display: LCD with backlight for easy readability
- CTCSS/DCS Tone Encoding and Decoding
- Built-in VOX (Voice Operated Transmission) function
- Durable, ergonomic design for handheld use
Basic Usage and Operation Tips
To operate the Kenwood TR-3500, first ensure the battery is fully charged. Turn on the device using the power switch and select the desired channel using the channel selector knob or keypad. Adjust the volume to a comfortable level. When transmitting, press and hold the push-to-talk (PTT) button, then speak clearly into the microphone. Release the PTT button to listen. Utilize the programmable memory channels to quickly access frequently used frequencies. Refer to the manual for detailed programming instructions.
Troubleshooting and Maintenance Notes
If you experience poor audio quality or weak transmission, check the antenna connection and battery charge level. Regularly clean the device exterior and connectors with a soft, dry cloth to prevent dust buildup. For battery maintenance, avoid overcharging and replace the battery pack if you notice reduced operating time. Consult the service manual for detailed circuit diagrams and component replacement procedures to address more complex issues.
Safety Reminder
Always operate the Kenwood TR-3500 in accordance with local regulations and licensing requirements. Avoid using the device near high-voltage power lines or during thunderstorms to prevent electrical hazards. Use only the recommended accessories and batteries to ensure safe operation. Keep the transceiver away from moisture and extreme temperatures to prevent damage and ensure user safety.