320M Troubleshooting Guide

Below is list of trouble shooting steps to use with your 320M or 320MP echosounders. If you have any questions, please contact our Technical Support Team.

You may also download the 320M Series Maintenance and Troubleshooting Manual, which provides the following troubleshooting section as well as color diagrams and a maintenance section.

To view these manuals you must have the free pdf viewer, Adobe Acrobat Reader® installed on your computer. If you do not have this program you can download it at the Adobe website: http://www.adobe.com/.

Troubleshooting Suggestions

Problem: Printer grid keeps changing. Back to Top
Solution #1: The communication cable from the MPM to the PCM has become damaged. Inspect the cable for possible breaks.
Solution #2: The 5V line provided by the Power Distribution Module has dropped to a low level. Adjust the 5V trimpot on the PDM.
Solution #3: Software mismatch between the PCM and MPM. Confirm versions with KEL Tech Support.
Problem: Depth displays show "5.678" Back to Top
Solution #1: The communication cable from the MPM to the FPM has become disconnected.
Solution #2: The 5V line provided by the Power Distribution Module has dropped to a low level. Adjust the 5V trimpot on the PDM.
Solution #3: The fuse on the MPM has failed. Replace the fuse.
Problem: Paper is Skewing. Back to Top
Solution #1: Make sure that paper is loaded straight. A small skew at the start of a paper roll can amount to problems by the end of a paper roll.
Problem: No output to transducers. Back to Top
Solution #1: Damage to transducer cable. Inspect the cable for possible breaks.
Solution #2: The fuse on the Transmitter module has failed. Replace the fuse.
Solution #3: There is no input voltage from the PDM. Measure and confirm 48V at fuse of transmitter module.
Problem: No serial communication to PC via COM3 Back to Top
Solution #1: Confirm proper baud rate and parity parameters on both ends.
Solution #2: Make sure communication cable is serial null modem cable.
Problem: Menu display shows error message "Printer not found". Back to Top
Solution #1: The communication cable from the MPM to the PCM has become damaged. Inspect the cable for possible breaks.
Solution #2: The 5V line provided by the Power Distribution Module has dropped to a low level. Adjust the 5V trimpot on the PDM.
Solution #3: The power cable from the PDM to the PCM has become damaged. Inspect the cable for possible breaks.
Problem: There is a constant blank line on the printout. Back to Top
Solution #1: Debris has built up on the printhead. Clean with cotton swab.
Solution #2: One or more elements on the printhead have been burned out.
Problem: The contrast of paper record printout seems light. Back to Top
Solution #1: Adjust the 24V trimpot on the PDM.
Solution #2: Make sure nothing is impeding the printhead plate from contacting the print roller.
Problem: The echosounder seems to reset in warmer conditions, but fine when cooled. Back to Top
Solution #1: Confirm the presence and then functionality of internal fans. Earlier models did not include this feature.
Solution #2: Confirm that the printer stepping motor has attached heatsink. Earlier models did not include this feature.