
C944 Treadmill
Page 38
Procedure 6.5 - 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
Notch
DIP28
Notch
Notch
PLCC44
Summary of Contents for c944
Page 39: ...C944 Treadmill Page 39 Wiring Diagram 7 1 C944 SCR 120 Vac J9...
Page 40: ...C944 Treadmill Page 40 Block Diagram 7 2 C944 SCR 120 Vac...
Page 42: ...C944 Treadmill Page 42 Block Diagram 7 4 C944 SCR 240 Vac...
Page 43: ...C944 Treadmill Page 43 Wiring Diagram 7 5 C944 PWM 120 Vac F1 Lift Fuse 2A Slow Blow...
Page 44: ...C944 Treadmill Page 44 Block Diagram 7 6 C944 PWM 120 Vac...
Page 45: ...C944 Treadmill Page 45 Wiring Diagram 7 7 C944 PWM 240 Vac F1 Lift Fuse 2A Slow Blow...
Page 46: ...C944 Treadmill Page 46 Block Diagram 7 8 C944 PWM 240 Vac...