Repair manual

Page 19
CONPONENT ACCESS
This section provides procedures for testing and
replacing various major components used in this
brewer should service become necessary. Refer to
Troubleshooting for assistance in determining the
cause of any problem.
WARNING - Inspection, testing, and repair of electri-
cal equipment should be performed only by qualified
service personnel. The brewer should be disconnected
from power source when servicing, except when
electrical tests are required and the test procedure
specifically states to plug in the brewer.
WARNING - Disconnect the brewer from the power
source before the removal of any panel or the replace-
ment of any component.
All components are accessible by the removal of
the top cover, front access panel and platform cover.
Refer to wiring diagrams at the back of this manual
when reconnecting wires.
CONTROL BOARD
Location:
The Control Board (Fig 1) is located under the top
cover behind the control panel.
Check for Power to board:
1. Insert one meter lead in J11-pin 12 and the other
lead in J11-pin 14.
2. With the power connected to brewer, the voltage
reading to the board should be the line voltage
rated for that model.
If no voltage is present, check wiring to the board.
If voltage is present, and brewer does not power on,
replace board.
Removal and Replacement:
1. Disconnect brewer from power source.
2. Disconnect the funnel sensor(s) from connector
J9 on the control board.
3. Disconnect the main harness from connector J11
on the control board.
4. Disconnect the ribbon cable from connector J4 on
the control board.
5. Disconnect the level probe harness and server
detect harness for SH models from connector J2
on the control board.
6. Remove the two mounting nuts securing the top
of the control board to the hood.
7. Tilt the control board inward to clear the display
section and lift out of the control board mount.
8. Place the bottom edge of the new control board
in the control board mount, tilt the board forward,
and secure with the two keps nuts.
9. Re-connect wires to the circuit board.
FIG 1 CONTROL BOARD MOUNTING
Control Board Mount
Control Board Mounting Nut
Ribbon Cable
41746 112008