Outback-power-systems FX Series Circuit Board Replacement Instruction User Manual download pdf

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Page 1 Rev 2.0 10/26/04 Tel 360 435 6030 Fax 360 435 6019

FX Circuit Board Replacement Instructions

There are three circuit boards inside the FX inverter. Normally, only two of

these boards are candidates for replacement; the FET board (large board that

includes the battery terminals) and the control board (smallest board that includes

the microprocessors). In some cases, however, the AC assembly (the “L”-shaped

boards that include the AC terminal block) is defective.

Tools required to service the FX are:

• #2 Phillips screwdriver

• 3/8” flat blade screwdriver

• 4mm hex wrench (included with the boards shipped to you)

• 10mm deep socket on a 12” extension with ratchet

• 10mm wrenches (2 of them would be nice)

• Rubber-band wrench (usually used for opening jars)

• Flashlight

• 9-volt batteries (three if you have a 12V or 24V FX, six for a 48V FX)

The FET board is the “brawn” of the system. It processes all of the high

current to and from the battery. This board contains the drive and overcurrent

protection circuits. In general, when an inverter fails, it is often the power FETs

that go. The FX is designed such that in the event of a FET failure, you replace

only the one assembly. There are two green LED’s on the FET board that help to

diagnose problems.

The control board is the “brains” of the inverter. It contains all of the

processing power as well as the unit’s memory. The processors and memory are

programmable and therefore possible to upgrade. It may be possible in the future to

download new code into the control board in the field, but for now we will have to

live with board swapping. There are either 15 or 20 (depending on the age of the

board) green LED’s on the back of the control board to help diagnose problems

with it.

The AC assembly is the I/O (Input/Output) portion of the FX. The AC

assembly consists of the AC board and the connector board. They are soldered

together to form one “L”-shaped assembly. This AC assembly will rarely require

repair or upgrade.

Once you have determined that the FX must come apart, use the following

guidelines to disassemble, repair, test and reassemble the unit. Repair should be

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Summary of Contents

Page 1

Page 2

Page 3 - Hex

Page 4 - Wire Connection

Page 5

Page 6

Page 7

Page 8

Page 9

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