MFJ MFJ-4215MV, MFJ-4218MV Instruction Manual

MFJ-4215MV Instruction Manual

Thank you for purchasing the MFJ-4215MV Switching Power Supply.
The MFJ-4215MV is designed to deliver up to 15 Amps intermittent or 13 Amps
continuous current at 13.8 VDC.

5-way binding posts and a cigarette lighter socket are provided for output
connection. The variable Output Control adjusts output from 4 Vdc to 16 Vdc.
The detent position on the Output Control pre-sets the output at 13.8Vdc.

The total combined output current for this power supply is 15 Amps intermittent
or 13 amps continuous @ 13.8 Vdc. Cigarette Light Socket has a current limit of
15 Amps. Do not draw current over the rated limited.

Installation

Before plugging the MFJ-4215MV in an AC outlet make sure that the proper
input AC voltage is set to the correct AC voltage you are using. Select 115 for
100/110/120 AC operation or select 230 for 200/220/240 ac operation. 115V is
the default factory setting. Do not connect any device to the power supply yet.
Turn the power supply ON. Set the output voltage by adjusting the variable
output control in front of the power supply. The MFJ-4215MV has variable
output adjustment from 4 Vdc to 16 Vdc. The control will set same output
voltage for output connectors. The detent position on the control is set for

13.8Vdc. Turn OFF the power supply after setting the output voltage.

Connect the loads to any of the output connectors. Positive to positive terminal
and negative to negative terminal. Reversed connection will damage your
equipment. Connect the devices to the power supply then turn ON the power
supply.

Protection

The MFJ-4215MV has fault protection for output terminal short or overload
(over 15 Amps), over voltage (preset at 16 Vdc) and component over heated. If
any the above conditions occur, the warning LED will come on. Under fault
condition, the power supply will automatically shut off. To reset, turn the unit
OFF and wait 20 seconds, then turn the unit back on.

2

MFJ LIMITED 12-MONTH WARRANTY

MFJ Enterprises, Inc. Warrants to the original owner of this product, if manufactured by
MFJ Enterprises, Inc. and purchased from an authorized dealer or directly from MFJ
Enterprises, Inc. to be free from defects in material and workmanship for a period of 12
months from date of purchase provided the following terms of this warranty are satisfied.

1. The purchaser must retain the dated proof-of-purchase (bill of sale, canceled check, credit card or
money order receipt, etc.) describing the product to establish the validity of the warranty claim
and submit the original of machine reproduction or such proof-of-purchase to MFJ Enterprises,
Inc. at the time of warranty service. MFJ Enterprises, Inc. shall have the discretion to deny
warranty without dated proof-of-purchase. Any evidence of alteration, erasure, or forgery
shall be cause to void any and all warranty terms immediately.

2. MFJ Enterprises, Inc. agrees to repair or replace at MFJ’s option without charge to the original
owner any defective product under warranty, provided the product is returned postage prepaid to
MFJ Enterprises, Inc. with a personal check, cashiers check, or money order for $7.00 covering
postage and handling.

3. This warranty is NOT void for owners who attempt to repair defective units. Technical
consultation is available by calling [phone].

4. This warranty does not apply to kits sold by or manufactured by MFJ Enterprises, Inc.

5. Wired and tested PC board products are covered by this warranty provided on the wired and
tested PC board product is returned. Wired and tested PC boards installed in the owner’s cabinet
or connected to switches, jacks, or cables, etc. sent to MFJ Enterprises, Inc. will be returned at the
owner’s expense un-repaired.

6. Under no circumstances is MFJ Enterprises, Inc. liable for consequential damages to person
property by the use of any MFJ products.

7. Out-of-warranty Service: MFJ Enterprises, Inc. will repair any out-of-warranty product provided
the unit is shipped prepaid. All repaired units will be shipped COD to the owner. Repair charges
will be added to the COD fee unless other arrangements are made.

8. This warranty is given in lieu of any other warranty expressed or implied.

9. MFJ Enterprises, Inc. reserves the right to make changes or improvements in design or
manufacture without incurring any obligation to install such changes upon any of the products
previously manufactured.

10. All MFJ products to be serviced in-warranty or out-of-warranty should be addressed to MFJ
Enterprises, Inc., 300 Industrial Park Road, Starkville, Mississippi 39759, USA and must be
accompanied by a letter describing the problem in detail along with a copy of your dated proof­of-purchase.

11. This warranty gives you specific rights, and you may also have other rights which vary from state
to state.