Procedure 6.9 - Replacing The Prom - Precor 9.23 Service Manual

Procedure 6.9 - Replacing the PROM

Note: If the lower PCA is replaced, the upper PCA to lower PCA initialization procedure
(Procedure 2.3) must be performed to ensure proper operation.
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)
DIP28 removal tool
4. The IC's may be 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 it and re-align it in its socket.
Notch
9.23, 9.27 Treadmill
PLCC44 removal tool
DIP28
Notch
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