Black Box Short-Haul Modem B, ME810, ME800A-R2, ME805-C-R2 manual Troubleshooting Guide

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SHM-B ASYNC

6. Troubleshooting Guide

The following information will help you troubleshoot your installation if problems develop. If your particular situation isn’t listed here, call Technical Support for assistance. Have ready a description of the problem with your installation, your DTE equipment make and models, your equipment’s DTE/DCE configuration and flow control type (hardware or software), your EIA-232 cable pinouts, and what (if anything) you have already done to correct the situation.

SYMPTOM: LEDs do not light when power transformer is plugged into a wall outlet.

1.Is the power connection loose? Try moving or nudging the wall transformer.

2.Are there broken power leads? Disconnect the power supply. Remove the printed circuit board from the chassis. Inspect the three leads from the transformer for continuity.

3.The SHM-B is defective.

4.SHM-B Async Card: Make certain that the SHM-B’s

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Contents Short-Haul Modem B SHM-B Async SHM-B Async SHM-B Async SHM-B Async Trademarks Used in this Manual Distance miles/km SpecificationsOperating Temperature 32 to 112F 0 to 50C SHM-B Async Introduction Four-Wire Connections InstallationSHM-B board 5-screw terminal block EIA-232 Connection Wiring diagram for two SHM-B unitsEIA-232 Pin Connections on SHM-B Switch SettingsPinning with DTE/DCE switch in the DCE position Flow Control ON/X-OFF Mode Operation Activating the Loopback switchSHM-B Async Rackmount Installation SHM-B Async Troubleshooting Guide SHM-B Async SHM-B Async SHM-B Async SHM-B Async SHM-B Async Copyright 2000. Black Box Corporation. All rights reserved
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