The Kenwood TM-255 adjustment manual provides detailed instructions for setting up and operating the radio in service adjustment mode, including procedures for correcting mechanical center positions, carrier point adjustments, and S meter curve adjustments. It also covers troubleshooting steps such as writing data into EEPROM and adjusting microphone gain control by ALC to ensure optimal performance.

• Brand: Kenwood-tm-255
• Model: ADJUSTMENT
• Type: manual
• File size: 2.3 MB

Manual Overview

The Kenwood TM-255A/E adjustment manual provides detailed instructions for technicians to perform service adjustments, focusing on calibration and troubleshooting. The manual outlines the service adjustment mode, which is activated by holding down specific keys and powering on the device. Technicians can navigate through menu numbers A1 to AQ and AA to AC for various adjustments. Key adjustments include RIT and IF-SHIFT VR mechanical center corrections, LSB and USB carrier point adjustments, and S meter curve adjustments for both FM and non-FM modes. The manual specifies procedures for inputting and storing A/D values into the microcomputer to ensure accurate meter readings. For example, the S meter curve adjustments involve inputting specific voltage levels to correct variations at S1, S9, and full-scale levels. Each adjustment procedure involves transmitting and using keys to modify and store correction frequencies or voltage levels. The manual emphasizes the importance of writing updated data into the EEPROM to maintain accurate settings.

Quick Issues Covered

• RIT VR mechanical center correction for frequency zeroing.
• LSB/USB carrier point adjustment in 10 Hz steps.
• S meter curve adjustment for accurate signal level display.

Overview

Refer to the PDF for details.

Specifications

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Controls & Indicators

Refer to the PDF for details.

Installation / Setup

Refer to the PDF for details.

Operation

The manual provides detailed instructions for operating in service adjustment mode. To start the adjustment menu, hold down the NB and MHz keys while switching the power on. Use the encoder to change the menu number, and press the UP or DOWN key to set it. Menu numbers A1 to AQ and AA to AC are available in adjustment mode. To cancel the adjustment mode, press the CLR key or turn off the power.

Specific adjustment procedures include setting the IF-SHIFT VR mechanical center by positioning the IF-SHIFT control at the center and pressing the F.LOCK/LOW or MIC UP/DOWN key. For LSB and USB carrier point adjustments, transmit and change the correction frequency using the F.LOCK/LOW or MIC UP/DOWN key. S meter curve adjustments involve inputting specified levels and pressing the F.LOCK/LOW or MIC UP/DOWN key to store the values in the microcomputer.

Troubleshooting & Error Codes

Refer to the PDF for details.

Safety & Warnings

Refer to the PDF for details.

Download ADJUSTMENT Manual (PDF – 2.3 MB)

Kenwood TM-255 Adjustment Manual PDF (2.3 MB): Guides technicians in calibrating and adjusting the Kenwood TM-255 model.

• Brand: Kenwood-tm-255
• Model: ADJUSTMENT
• Type: Manual
• File size: 2.3 MB

Overview

Brief overview of the product.

Specifications

• Key spec 1
• Key spec 2

Controls & Indicators

Control panel/button layout.

Installation / Setup

1. Step 1…
2. Step 2…

Operation

Basic usage, modes, cycles.

Troubleshooting & Error Codes

Safety & Warnings

• Important warning…

Downloads

Download ADJUSTMENT manual (PDF)