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C546 Self Powered Elliptical Fitness Crosstrainer

Page 64

Procedure 7.22 - Replacing the PROM

Anti-static kits (part number 20024-101) can be ordered from Precor.

1. The PROM and the associated printed circuit assembly (PCA) are static sensitive. Anti-

static devices must be used and all anti-static precautions must be followed during this

procedure.

2. Remove the printed circuit assembly per its associated procedure.

3. Currently we are using two styles of IC software packages. they are a 28 pin dual in line

package (DIP28) and a forty-four pin square package (PLCC44). Each of these packages

should be removed with a proper IC removal tool (see the illustrations below)

4. The IC’s may inserted into their socket by hand by carefully aligning the notch on the IC with

the notch on the IC socket and carefully pressing the IC into its socket. See the illustrations

below for the alignment notches. Care must be taken that the IC legs on a DIP28 are all

aligned in the socket to prevent the legs from bending when inserted. The PLCC44 IC must

be carefully aligned squarely in its socket or it will not insert. Do not force the IC into its,

socket. If it does not insert easily, remove the it and re-align it in its socket.

DIP28 removal tool

PLCC44 removal tool

Notch

DIP28

Notch

PLCC44

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Precor EFX546 Manual de Serviço Página 64