MFJ MFJ-4402 Instruction Manual Download Page 1 | Manualshive

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Summary of Contents for MFJ-4402

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Page 2: ...ations technical manuals documents positional handbooks or other official publications The copy of this manual provided to the customer will not be updated to reflect current data Customers using this manual should report errors or omissions recommendations for improvements or other comments to MFJ Enterprises 300 Industrial Park Road Starkville MS 39759 Phone 662 323 5869 FAX 662 323 6551 Busines...

Page 3: ...ns 2 Installation 2 Radio is Already Installed 3 Radio and Power Lines Not Installed Yet 4 Ignition Sense Line Installation 5 Checkout and Operation 6 Adjustments 6 Timer Adjustment 6 Undervoltage Cutout 6 Fuse Replacement 6 Powerpole Connector Assembly 7 Additional Materials That May Be Needed 8 Schematic 9 Troubleshooting 9 NOTES 11 FULL 12 MONTH WARRANTY 12 ...

Page 4: ...t start The MFJ 4402 has a circuit to cut the radio off before the voltage gets down too low for proper operation A third issue that occasionally happens is leakage currents in the portions of the radio that do not get disconnected when the power is turned off rise to levels that can discharge batteries especially batteries that are near the end of their life The MFJ 4402 disconnects the power to ...

Page 5: ... in a convenient out of the way place that is not exposed to outside conditions The MFJ 4402 is not waterproof or made for exterior use Do not use on positive ground vehicles The MFJ 4402 is designed for negative ground 12V electrical systems only WHEN WORKING AROUND THE BATTERY IT IS RECOMMENDED TO DISCONNECT THE BATTERY TERMINALS TO REDUCE THE CHANCE OF A SHORT CIRCUIT A SHORT CIRCUIT CAN CAUSE ...

Page 6: ...ole installation and go to step 4 When wiring make sure that the RED terminals go on the positive wires which should be red and the BLACK terminals go on the negative wires which should be black 1 Remove the fuses in the line to the battery 2 Cut the cable where the MFJ 4402 is to be installed 3 Install Powerpoles on each end of the cut cable 4 Make sure the Powerpole connectors are put together t...

Page 7: ...e job Loosening the bolt and stuffing the wire behind the bolt is not recommended Corrosion and reliability issues will show up in the future Good quality properly sized solder lugs special terminals or special side mount bolts that have screw terminals to replace the existing side mount bolts are strongly recommended These should be available at well stocked auto parts stores 1 Connect a power li...

Page 8: ...LFUNCTION If tapping a fuse connection use adapters that are designed for this job Just pushing a bare wire in between the fuse lug and the socket is not safe Stray wire strands can short out the block Follow the instructions with the adapters to insure they are installed correctly Put the connector on the fused side of the fuse to protect the connection and wire in case of a short circuit Do not ...

Page 9: ...y 4 seconds Undervoltage Cutout 1 Adjustment range is approximately 10 to 12 5V Mid range is approximately 10 8V 2 This adjustment requires an adjustable power supply to properly set the level 3 Remove the MFJ 4402 from the vehicle 4 Connect an adjustable power supply to the MFJ 4402 with the negative connection to either of the BLACK Powerpole connections and the positive to the IGNITION SENSE li...

Page 10: ...areful not to deform or squash the terminal body If you do crimp again to return it to its original shape Otherwise the terminal may not fit inside the housing Be sure that you have a good firm connection to reduce resistance If you solder wires to the terminals tin them lightly first When soldering flow solder only into the hole in which the wire is inserted Be careful not to get any solder aroun...

Page 11: ...ems listed Quantity Item Notes Red Stranded Wire 12 gauge minimum Larger wire can be used but may not fit the terminals properly Black Stranded Wire 12 gauge minimum Larger wire can be used but may not fit the terminals properly Wire Ties Electrical Tape Terminal to fit Accessory connection If used Fuse tap If used must fit the fuse in the panel Terminal to fit fuse tap If fuse tap is used Strande...

Page 12: ...e line to the MFJ 4402 Find and repair short in cable Negative Fuse blows in line to battery Battery ground loose or inadequate Repair ground in the vehicle Delay time too short or long Adjust the time delay control on the MFJ 4402 Cutout voltage wrong Adjust the LV SET control See the radio owners manual for the minimum level recommended Radio still looses memory Check radio memory battery if one...

Page 13: ...Whine The MFJ 4402 does not fix alternator whine Have the alternator checked out A blown diode in the alternator may not inhibit its function but will increase whine Check battery and alternator connections for corrosion and loose connections Add an alternator whine filter capable of 30A capacity ...

Page 14: ...MFJ 4402 Mobile Transceiver Protector Instruction Manual 2012 MFJ Enterprises Inc 11 NOTES ...

Page 15: ...ovided to cover postage and handling 4 This warranty is NOT void for owners who attempt to repair defective units Technical consultation is available by calling 662 323 5869 5 This warranty does not apply to kits sold by or manufactured by MFJ Enterprises Inc 6 Wired and tested PC board products are covered by this warranty provided only the wired and tested PC board product is returned Wired and ...

Page 16: ...MFJ 4402 Mobile Transceiver Protector Instruction Manual 2012 MFJ Enterprises Inc ...

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