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Appendix C. Changing the Software Chips
This appendix describes servicing the following com-
ponents in the PrecisionFlo control assembly box:
Service Control Board Assembly
Current/Temperature Board Assembly
WARNING
ELECTRIC SHOCK HAZARD
Installing and servicing this equipment
requires access to parts which could
cause an electric shock or other serious
injury if the work is not performed properly.
Do not service this equipment unless you are
trained and qualified.
The power to the PrecisionFlo Control must be
off before you begin to change the software.
CAUTION
The service technician and the equipment must be
grounded to avoid static electricity discharge, which
can damage electronic components. It is recom-
mended that the technician wear a static-strap.
NOTE: Have the system binder (a collection of manu-
als and diagrams in a three-ring binder, supplied by
Graco) available to refer to.
Installing the New Software
To install the new software, do the following:
1.
Turn off the power to the PrecisionFlo Control.
2.
Locate the control board (32) in the control box
assembly. See Fig. 45.
Fig. 45
05499
32
U9
U4
U7
U1
U6
3.
Locate the software chips U6 and U7 on the con-
trol board (32). Note the direction of the chips.
4.
Use an I.C. extraction tool (33) to remove the old
software chips. Pull the chips directly up. See
Fig. 46.
Fig. 46
33
To remove the software chips without an extraction
tool, carefully pry the chips out evenly on both
sides. See Fig. 47.
Fig. 47
5.
Install the new software chips. Make sure chips U6
and U7 are placed in their proper locations. Verify
the chips are facing the correct direction and all
the pins are in the holes. See Fig. 48.
Fig. 48
Note direction
of chip
Make sure all the
pins are in the holes
6.
Set the proper parameters in the setup program.
Service Control Board
Electrical Troubleshooting
Have the following items available before you begin
troubleshooting.
PrecisionFlo system binder (collection of manuals
and diagrams in a three-ring binder, supplied by
Graco)
Voltmeter that is capable of reading values in ac
and dc voltage.
Small standard screwdriver