6. Replace the control circuit board (See Figure 2):
a. Remove five pin cable connector.
b. Flip up tab on switch flex tail connector and remove tail from connector.
c. Remove three screws securing board to the enclosure and remove board.
d. Replace with new circuit board and re-assemble by reversing above procedure. Be sure that
the switch flex tail is inserted far enough into its connector that the locking teeth on the
connector tab engage the slots in the switch tail.
i’. If unit still does not operate, check membrane switch by removing switch tail from connector and
inserting tail of a new unattached membraneswitch in connector from P. C. board sideof hood and
secure with tab. Insure that tail is oriented same as tail on attached switch. Operate switch and if
unit operates, replace attached switch with new switch. To replace membraneswitch, proceed as
follows:
a. Release switch flex tail from P. C. board connector.
b. Remove front trim by removing screws securing trim to hood. Be careful not to scratch or
otherwise damage trim.
C.
Remove switch by carefully running a sharp thin knife or razor blade under edge of switch to
break adhesive loose at one end of switch. Pull switch with steady outward pressure.
d. Replace switch by removing paper backing, inserting flex tail in hood front slot and
CAREFULLY aligning switch before allowing adhesive to secure switch to front panel.
Remove switch front protective coating by carefully peeling off of switch.
e. Insert flex tail into circuit board connector and secure with locking tab.
f. Operate unit and if it works properly, replace trim, original circuit board, and circuit board
enclosure cover.
/- PC BOARD MfG SCREWS@)
FIVE PIN CONNECTOR
FIG. 2
P C BOARD REMOVAL
