Braun CombiMax K 750 Operator's manual

Service Documentation Market Release 4/97
Braun CombiMax K 750 3202
3202

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Exploded Drawing
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Spare Parts List
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Pos. No. Part Description Part Number
1Cover 3202627
2Return spring 3205029
3Leg spring 3202014
4Lever 3205017
5Switching PCB 3205641
6Coupling 3202056
7Coupling 3205053
8Safety lock 3202629
9Housing K 750 3202636
10 Setting knob 3205629
11 Switch knob 3202628
12 Button 3202012
13 Pressure spring 3210004
14 Spring 3205016
15 O-ring 3205055
40 Protective cover 3202011

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Exploded Drawing
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Spare Parts List
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Pos. No. Part Description Part Number
16 Spring 4227016
17 Carbon brush 4227034
18 Motor cpl. 3205634
19 Ferrite tube 3205155
20 Wiring, black 3205930
20 Wiring, brown 3205931
20 Wiring, orange 3205932
20 Wiring, red 3205933
20 Wiring, blue 3205934
21 Cable support 3202002
22 Washer 0111410
23 Damper 3205038
24 Supporting frame 3202625
25 Screw 0033423
26 Gear wheel with shaft 3202944
27 Tension roller 3202878
28 Gear wheel with shaft 3202626
29 Toothed belt 3202031
30 Screw 0028012
31 Cable clamp 4206149
32 Mains lead 3205879
33 Base 3202621
34 Rubber foot 3205025
35 Screw 0033419
36 Switch-PCB 3205642
37 Switch cam 3205078
38 Insulating tube 0818182

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Exploded Drawing
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Spare Parts List
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Pos. No. Part Description Part Number
55 Lid 3202643
56 Seal ring 3202144
57 Mixer blade 3202640
59 Mixer bowl 3202641
60 Pusher 3200032
61 Lid 3200640
62 Blade 3200636
63 Ice crushing blade 3200646
64 Kneading hook 3200635
66 Safety cover 4293067
67 Whipping attachment 3200645
68 Bowl 3200630
70 Grating insert 3200151
71 Coarse slicing insert 3200153
72 Fine slicing insert 3200152
73 Coarse shredding insert 3200155
74 Fine shredding insert 3200154
75 Julienne insert 3200158
76 Insert carrier 3200633
77 French fries system 3200634
78 Slicing insert 3200650
79 French fries insert 3200651
80 Insert carrier 3200649

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Exploded Drawing
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Spare Parts List
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Pos. No. Part Description Part Number
1Cone 3200637
2Strainer basket 3200638
30 Mixing arm 3200644
31 Whisk 3200643

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Service Information
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Technical Data
Nominal voltage/frequency: 120V 60 Hz
Driving motor: DC motor B2-DC
Nominal power: approx. 600 W (load dependent)
No-load power: approx. 120 - 180 Watts
No-load speed position 2: approx. 240 - 300 r.p.m. at the bowl coupling
No-load speed position 14: approx. 1850 - 2200 r.p.m. at the bowl coupling
No-load speed position 2: approx. 1100 r.p.m. at the mixing coupling
No-load speed position 14: approx. 10500 r.p.m. at the mixing coupling
Overload protection: electronic controls, see use instructions
Mixing arm rotation: approx. 14 - 130 r.p.m. mixing arm into the bowl
approx. 144 - 1320 r.p.m. whisk into the mixing arm
Length of mains lead: approx. 1.30 m
Note about the screws The special screws (25/35), can only be removed with a screw
driver furnished with a special blade insert. These special blade
inserts for the screwdriver can be ordered from the parts department.
Because of approval-board requirements and reasons of safety, only
the special screws (35) into the base plate must be used to avoid
tampering by un-authorized persons.
Note about the PCB Attention, charging capacitor on the PCB (36) is charged, use a
resistor of 10-50 Ohms to discharge.
Note about the wiring All connecting cables are provided with self-securing plugs. In order
be bent down slightly. These pins must not be deformed or broken
off. In case that the plug does not snap in correctly to the connecting
contact, a completely new cable must be used.
Note about the speed It is not possible to adjust the speed. In case that the number of
revolutions does not correspond to the technical data, the device is
defective.

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Service Information
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Dismantling Remove all supplementary parts from the device and turn the switch to the “0”
position.
Exchangeable parts assembled in the housing upper part
Remove the cover (1) by means of a dismantling fork (already existing for K 1000),
see sketch 1.
Now, the leg spring (3), the lever (4) and the switching-PCB (5) can be reached.
Exchangeable Parts assembled in the housing lower part
For the sake of a better dismantling, the parts in the housing upper part must be
dismantled.
Take off the setting knob (10) and the switch knob (11) to the front. Remove the
button (12) and the pressure spring (13) to the front.
Place the supporting plate underneath the corresponding coupling shaft by inserting
the supporting bolt from the lower side into the small long hole (8 x 3 mm) in the
base plate, see sketch 2. Now, cleave the coupling (6/7) with an appropriate tool
(e.g. screwdriver size 4 - 5.5 mm) in the center of the top and remove it from the
shaft.
Unscrew the screws (35) in the base (33) and remove the base.
The completely assembled carrier with motor can be removed from the housing.
All remaining parts which are as well shown in the exploded drawing can be disman-
tled and exchanged.
Before dismantling the gear wheels with shafts (26/28), the tension roller (27) and
the motor (18) the toothed belt (29) must be removed.
The safety lock (8) is inserted in the housing by means of two snap-in pins.
Reassembly To be performed in reversed order. However, attention must be paid to the
following points:
After reassembling the gear wheels (26/28), the tension roller (27) and the motor
(18) the toothed belt must be orderly positioned and the tension must be reapplied.

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Service Information
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Attention must be paid to the reassembling position of the motor and to the cable
connection (+/-), see sketch 3.
Tension of the toothed belt: Slightly loosen the motor securing screws and displace the
motor (18) on the carrier. If the toothed belt is correctly tensioned, the motor securing
screws (25) will be tied. Please refer to sketch 4 for the tension value of the toothed
belt.
The both washers (22) must be attached to the shafts. The O-rings (15) must be
inserted into the housing.
Attach all dampers (23) for the carrier.
Insert the completely reassembled carrier into the housing (9).
Connect the leads to the switch-PCB (36), see sketch 3.
Insert the switch-PCB into the guides of the base plate and the switch cams (37), see
sketch 6.
Attach the base (33) and the rubber feet (34).
Place the supporting plate underneath the corresponding coupling shaft. Then, press
the coupling onto the shaft by slightly tapping against the embossing spike. The axial
free space of the coupling shafts must be 0.4 mm - 0.6 mm, see sketch 5 (symbolic
illustration). A smaller or larger axial free space may cause a defect of the appliance.
Insert the setting knob (10), and make sure that the potentiometer for the setting knob
axis is placed in the correct position.
Insert the spring (14) into the housing front.
Assemble the pressure spring (13), the button (12) and the switch knob (11), see
sketch 6.
Connect the leads to the switching-PCB (5) and insert the switching-PCB into the
housing upper part.
Insert the lever (4) and the leg spring (3), see sketch 7 (symbolic illustration).
Attach the cover (1) to the housing upper part until it snaps in.

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Service Information
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Measuring points PCB In case the switching contacts on the PCBs (5 and 36) are closed and
a connecting wire at the motor (for example +) is taken off for the
measuring process.
NL Mains voltage
+-165-170 Volts DC voltage (intermittent 6-10 kHz)
PM165-170 Volts DC voltage (constant)
N~Mains voltage
Function Check Check the appliance in all switching positions and, if necessary,
attach the available supplementary parts.
Check the security locks with and without the complete bowl resp.
mixer.

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Reference Drawing
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Reference Drawing
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Service Information
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Reference Drawing
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