Replacing the Fuse | Radio Shack HTX-242 instruction

Replacing the Fuse

Your HTX-242 (and vehicle) are protected by a 15-amp fuse in the HTX-242’s positive (red) power wire. If the HTX-242 does not turn on, even when you are sure the power wire is properly connected to a 12V DC power source, check the fuse and replace it, if necessary.

1.Snap open the in-line fuse holder.

2.Remove the fuse from the holder, and slide the fuse out of the end connectors.

3.If the fuse’s filament is no longer intact, replace the fuse with a 15-amp 11/4 ⋅ 1/4-inch fuse (Cat. No. 270-1073).

Caution: Use only a fuse of the recommended size and type. Using another type fuse, or defeating the fuse protection, could damage your vehicle or your HTX-242. If the fuse frequently blows, there is a problem with the HTX-242 or its wiring. Have that problem fixed as soon as possi- ble.

4.Replace the fuse in the holder and snap it closed.

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Radio Shack HTX-242 owner manual Replacing the Fuse

Contents

HTX-242 TWO-METER Mobile Trans Ceiver Introduction Features Using this Manual Contents Using Dtmf and Subaudible Tones Using Memory ChannelsUsing the Menu Troubleshooting Specifications Schematics Unpacking the Transceiver InstallationConnecting the Microphone Mounting the HTX-242 in a Vehicle Connecting an Antenna Connecting to your Vehicle’s Power Using the HTX-242 as a Base Station Connecting an External Speaker Optional Using the HTX-242 with Packet Radio Dual VFO Modes Dtmf Touch-Tone FeaturesUnderstanding the HTX-242 Memory Channels Subaudible Tone Ctcss FeaturesRepeater Operation VFO-A-T Understanding the DisplayPage Basic Operation Resetting the HTX-242Turning On/Off Your HTX-242 Extending the Transmit Frequency Range Using the Light Setting Volume and SquelchSetting the Power Level Locking the Controls Directly Entering a Frequency Tuning to a FrequencySelecting a Frequency Scanning for a Frequency Setting the Frequency Step Storing Scan Skip Frequencies Setting the Scan OptionsSetting the Scan Resume Condition Setting the Scanning Range Setting the Scan Resume Delay Transmitting Receiving Transmissions Transmitting Dtmf Tones from Memory Manually Transmitting Dtmf Tones Limiting Transmit Duration Turning the Keytone Beep On and Off Advanced Operation Frequency Offset DefaultsTurning Auto Duplex On and Off Receive Frequency Transmit Offset Overriding the Duplex Offset Changing the Default OffsetReversing the Offset Using the Dual VFOs for Duplex Operation Storing a Frequency Using Memory ChannelsChanging Stored Settings Using Auto Memory Store AMS Checking Priority Channel Tuning to a Standard Memory ChannelUsing the Calling-Frequency Memory Enabling/Disabling Scanning for Memory Channels Scanning Memory ChannelsClearing a Memory Channel Transmitting a Dtmf Sequence Using Dtmf and Subaudible TonesStoring a Dtmf Sequence Name Assignment Dtmf Page Sequence Using DtmfUsing Group Calling Using Auto-Reply Using Dtmf Auto Send Setting the Subaudible Tones Using Subaudible TonesValid Subaudible Tones Code Freq. Hz Activating Subaudible Tone Transmit and Squelch Setting the Dtmf Page and Subaudible Tone Alert Using the Menu OFF Menu Default Explanation/Available Settings Option Error Codes TroubleshootingCommon Problems and Solutions Problem Possible Solutions Replacing the Fuse Receiver SpecificationsGeneral Transmitter Schematics RF Schematic Digital Schematic Microphone Schematic Radio Shack Division of Tandy Corporation Fort Worth, Texas