Disassembly-/Re-Assembly - Philips HD7751 Service Manual

DISASSEMBLY- AND RE-ASSEMBLY ADVICE
A. Heating element removal
1. Turn the appliance upside down and remove the
bottom from the base by unscrewing the 4 screws
under the rubber foot.
2. Remove the heating element by unscrewing the
5 screws B.
3. Remove the tubes from the heating element and
disconnect the wires.
B. PCB removal
1. Turn the appliance upside down and remove the
bottom from the base by unscrewing the 4 screws
under the rubber foot.
2. Remove the 2 screws C.
3. Disconnect the wires.
White / neutral wire
Black / Black wire
Synchronous motor
Brown
wire
Black Blue
wire wire
C. Grinder Motor removal
1. Unscrew the bean tray by unscrewing the 3 screws D.
2. Unscrew the 8 screws
aware of the 2 screws under the tank lid. They are
protected by plastic caps, and can be very hard to
remove. You can try blowing them out with a shot
of compressed air, otherwise you may have to use a
drill to get them out. New caps are available as 12nc:
4222 459 48871 (Pos 6.).
3. Remove the 7 screws
motor. (See picture with Pos 11 Grinder Motor)
4. Disconnect the Black / Red wire on the PCB.
(See instructions B). Unfortunately there is a ferrite
bead around the leads preventing easy removal, it may
be necessary to cut out a small piece of the plastic
bridge in the appliance to get it out.
Black / Red wire
Grinder motor
Panel connection
Red
wire
E on the top cover. Be
F en 4 screws G from the grinder
5. During installation of the grinder motor be aware of
the position of the Knob compared with the position
A
of gearwheel 4. On gearwheel 4 you will see an arrow
and when this arrow points to the marked line, the
Indication on the knob has to point to number 5.
This means the fl at side of gearwheel 1 has to be on the
side off the front panel.
A
Flat
side
Gearwheel 1
Remark;
How to set the motor grinder in a stronger or milder coffee
position?
When in the maximum setting, the coffee is not strong or mild
enough; the motor grinder can be changed in a stronger coffee
position by turning the gearwheel 4 a couple of gear teeth to
the left. The motor grinder can be changed in a milder coffee
position by turning the gearwheel 4 a couple of gear teeth to the
right.
D. Front panel removal
1. Remove the 2 screws H.
2. Disconnect the wire fl at cable on the PCB.
(See instructions B).
Be aware to use the rails when refi tting the front panel
with the base, and be aware to guide the wires along the
motor correctly.
E. Filter holder Housing removal
1. Turn the appliance upside down and remove the
2 screws I. (See picture pos 17 fi lter holder housing)
2. Remove the axle, and remove the fi lter holder housing.
HD7751
Gearwheel 4
Stronger coffee
Milder coffee
2-7