Excel 15 W7760A EPROM Replacement
REPLACEMENT
EPROM
Note: Orient the board with heat sink to
left. The EPROM to be replaced is the
socketed component located closest to
the component labeled Echelon
Heat Sink
Home and Building Control
Home and Building Control
Home and Building Control Products
Honeywell Inc.
Honeywell Limited-Honeywell Limitee
Honeywell AG
Honeywell Plaza
155 Gordon Baker Road
Böblinger Straße 17
P.O. Box 524
North York Ontario
D-71101 Schönaich
Minneapolis, MN 55408-0524
M2H 3N7
Phone (49-7031) 637-01
Fax (49-7031) 637-493
Echelon
Jack
8. Insert the tips of the Extraction Tool in the diagonal slots of the micro socket, and slowly remove the EPROM with a
rocking motion.
9. Again, making certain you are grounded, insert the new EPROM into the socket, orienting the notch in the chip with the
notch in the socket in the lower right hand corner. The EPROM may be inserted into the socket by placing it on top of the
socket and pressing it into place with thumb pressure until it is seated. While pressing the EPROM into the socket, keep
another finger on the rear of the circuit board behind the socket so the board is not stressed while pressing with the thumb.
10. Turn the circuit board upside down again and orient it on the cover. Replace the two center screws.
11. Replace the protective paper and the galvanized plate. Replace the 4 screws in each corner.
12. Replace the labeled plastic sheet.
13. Keep EPROM in a safe place until system operation has been confirmed.
14. Make a record of the W7760A as being updated. It is good idea to make a mark on the controller to that effect as well.
15. Reinstall the W7760A.
Printed in U.S.A. on recycled
paper containing at least 10%
95-7631 D.B. 12-99
post-consumer paper fibers.
www.honeywell.com