HD7857/50 / HD7857/51
6-24
DISASSEMBLY- AND RE-ASSEMBLY ADVISE
Remove the brewhead.
• Unhook the 3-way valve from the Brew chamber back
frame and undo the hose from the 3-way valve to the
brew chamber.
• Unhook the boiler from the boiler support on the Brew
chamber bottom.
• Unhook the Brewhead detection sensor from its
mounting and disconnect the UI cable from the Main
PCBA (
J3
) to the brewhead, and undo its routing
through the inner frame.
• The Brew head can now be tilted forward and removed
from the appliance.
Remove the PCBA
• To be able to remove or replace the PCBA it is the
easiest to open the appliance up until you have the Brew
head removed.
• Carefully unplug all connectors on the lower right side
of the PCBA for the NTC’s, Brew head switch and water
level sensor.
• Disconnect the Brown and Blue lead from the Cordset
on the left side of the PCBA
• Undo all fixed leads from their routing through the
frame. They are going to: Boiler, Thermo block, Steam
pump and Water pump.
• The PCBA is held in place by one screw (
E
) in the center
of the PCBA.
Open the brew head lid
• To be able to open the lid of the brew head, remove the
front, back and side covers.
• Disconnect the UI cable from the Main PCBA (
J3
) to the
brewhead, and undo its routing through the inner frame.
• Undo the hose from the 3-way valve to the brew head.
• Use a flathead screwdriver to unhook one side of the
hinges of the brew head lid. Carefully feed the hose and
cable through the frame.
• To open the lid, undo the eight snaphooks holding the
lid in place. To be able to remove the lid completely the
lever needs to be in the Open position (flipped up).
Note: Please make very sure that all wires you have
undone will be put back properly and with
the same routing as they have originally been
designed.
Note: Any tie-wrap that has been cut must be
replaced by a new one as specifi ed on the Parts
list, and tightened with a force of 115 N.
Summary of Contents for Senseo Latte Duo HD7857/50
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