Honeywell Excel 15 W7760A Installation Instructions

DESCRIPTION
This EPROM Replacement procedure outlines the
process to upgrade the Excel 15 W7760A Controller to
the latest firmware release.
Firmware replacement kit: Part # 32004159-002
Procedure will apply to future firmware as released.
Material Needed
1. Replacement EPROM. Programmed with new Firmware
2. #10 Tork Driver (preferred), or 3/16" thin flat-blade
screwdriver
3. Extraction Tool: AMP PLCC Extraction Tool 821903-50
00, AMP 822154-1 00, or small diameter probe/object
(i.e. paper clip)
Procedure
1. Discharge static electricity form body by touching known
earth ground.
2. Remove W7760A from wiring subbase. Place controller
on work surface with pins and label side up.
3. Remove plastic, anti-static sheet. (This sheet contains
device information) – Set aside.
Caution: Do not tear plastic protective sheet at
corners.
4. Using the #10 Tork Driver or flat-bladed screwdriver
remove the four screws around perimeter. Put the
screws aside in a secure place for later re-assembly.
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Excel 15 W7760A
EPROM REPLACEMENT
5. Remove galvanized plate. Place on adjacent work
surface in the orientation as it was removed
Work Surface
6. Set aside paper protective sheet, then remove 2 screws
that secure board to cover.
7. Making certain you are grounded. Remove the circuit
board and place it component side up, pin side down on
top of the galvanized plate. Extend pins over the edge
on each side of the galvanized plate.
Board
Work Surface
Plate
Side View
Plate
Side View
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