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Service Documentation Braun BaristaMaster
Market Release 9/95
KFE 750
3064
3064
BINC Rev: 7/96 BAG Rev: 9/95
Service Documentation
Exploded Drawing 3064
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Service Documentation
Spare Parts List 3064 Part Description
Tank cover Upper housing cpl. Angle elbow Boiler filter Sealing Sensor cpl. Earth connection Nut Insulating plate Lever Pressure spring Coulisse Interlock/Coffee switch Shower head support Sealing ring Flat spring Steam pipe Motor Toothed belt Pump cpl. with motor Screw Damper Chassis Screw Lower housing Switch knob Switch marking 3-piece connector Valve cpl. Switch-P.C.B. 10-piece wire LED-P.C.B. Contact rubber Push button Cover-Box Mains lead Control P.C.B. Transformer Base Plate Rubber foot Screw 4-piece connector Pressure tube, 120 mm
Pos. No.
1 2 3 5 6 7 8 9 10 12 14 15 16 17 18 19 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 49
Part Number
3063655 3063677 3063162 3063987 3063080 3063659 3063083 0065007 3063084 3063119 3063012 3063113 3064654 3063651 3063118 3064012 3063942 3063667 3063056 3063666 0034001 3063067 3063007 0033403 3064651 3063032 3063010 3063142 3063675 3064661 3064013 3064657 3064016 3064010 3063018 3064027 3064660 3063670 3064653 4107012 0033410 3063140 3063078
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Service Documentation
Exploded Drawing 3064
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Service Documentation
Spare Parts List 3064 Part Description
Pressure tube, 130 mm Pressure tube, 190 mm Tube Hose clip (pinch) Hose clip (spring) Regulating knob Tube Measuring spoon 2 Cups filter (espresso) 4 Cups filter (espresso) Filter holder Swivel support Carafe lid Carafe Stand Drip tray Creaming nozzle 4 Cups filter (coffee) Wire-strap for wiring
Pos. No.
50 51 52 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71
Part Number
3063075 3063077 3063040 3063048 3063049 3064011 3063044 3063098 3063953 3063954 3063109 3063661 3064015 3063790 3063005 3063924 3063951 3064909 3063033
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Service Documentation
Service Information 3064
Technical Data Voltage: Frequency: Nominal wattage: Boiler-Capacity: Maximum pump pressure: 1. Espresso: Green LED illuminates: Green LED flashing: Current limiting when >15 bar: Espresso temperature into the cup: Temperature control: Overheating protection: Length of Mains lead: * Important: 120 V 40 - 60 Hz 1000 Watt 450 ml >15 bar Total time approx. 6 Minutes approx. a Minutes for cooking and approx. 3 Min. for working temperature approx. 9.9 Ampere on Pump motor approx. 71 °C - 78 °C 1 Thermostat * (not exchangeable) 2 SOD-Fuses * (not exchangeable) (SOD = Single Operation Device) approx. 1 .00 Meter
It is not allowed to make any changes at the fuse and at the thermostat. The contacts must not be bent, re-bent, re-soldered or in any case bridged.
Functions Switch knob for: espresso / coffee specialties hot water steam neutral position coffee specialties "cafe creme" / "cafe" "espresso cappuccino" = yellow "cafe creme" / "cafe" = yellow warning = red readiness indicator = green on/off switch = red
Regulating knob for: Pilot lamp for:
Note: The special screws (28/45), can only be removed with a screwdriver furnished with a special blade insert. These special blade inserts for screwdriver can be ordered from the parts department. Because of approval-board requirements and reasons of safety, only the special screws (45) into the base plate must be used to avoid tampering by un-authorized persons.
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Service Documentation
Service Information 3064
Dismantling Prior to repairing the device, a soft pad should be placed on the working surface to prevent the device from being scratched. LED-P.C.B. (36)/Transformer (42)/Control-P.C.B. (41): Unscrew the base plate screws (type: tri-wing). Insert a screwdriver (approx. 4 mm end width), successively, in the square indentations on the base plate pressing the pins slightly in an outward movement. The base plate is detached. The connecting leads are slipped onto the P.C.B. Remove the regulating knob (59) from the LEDPCB in frontward direction. The mains lead (40) and the connections of the boiler are provided with self-protecting plugs; the protection pins of their plugs must be pushed somewhat outwards when dismantling. The transformer, switch and LED-P.C.B. are merely placed in their appropriate mounting positions. After removing the control-P.C.B., the potentiometer used for the motor control must be readjusted. Sensor (7)/Motor (22)/Pump (24)/Valve (33)/Lower Housing (29)/Switch-P.C.B. (34): Following the procedure described above, remove the cover-box (39) and unscrew the four screws (type: Torx T 10). Remove the switch knob (30). Now, slightly lever the both notches at the valve by means of a screwdriver and turn the valve approx. 45 degrees to the front (bayonet lock, see sketch 1). Remove the valve from the lower housing (29). Take off lower housing in an upward movement. Special care has to be taken that the connecting leads and tube connections must not be damaged. The switch-P.C.B. is fixed on the backside of the valve by four notches. Remove the connection plug, carefully press sidewards the both notches next to the plug connection, and take off the P.C.B. Unscrewing the nut (9), the sensor can easily be removed. The pump is hanged into the chassis (27) with two dampers (26). Release the pump and detach it from the sealing (6). The motor can be released from the pump after removing the connecting leads and unfastening the both screws (25). For exchanging the toothed belt (23), carefully press apart the pump cradle. Upper housing cpl. (2)/Shower head support (17)/Chassis (27)/Steam pipe (21): Take off the chassis and remove the tube connection from the steam pipe. Slightly press apart one of the guide notches for the steam pipe and take off the steam pipe. Remove the lever (12) towards the front and pull the shower head support out of the upper housing cpl. (2). By taking the coulisse (15) off the shower head support, the interlock-switch (16) can be removed from its holder. Upper housing cpl. (2): Is one group including the boiler, frame and housing upper part. For safety reasons it is not possible to disassemble.
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Service Documentation
Service Information 3064
Removing the tube connections: The hose clip (spring) (58) is to be pressed together on its ends by means of a suitable flat-nose pliers and pulled off. On the hose clip (pinch) (57) connection the tube is powerfully removed together with the hose clip (pinch). Generally, after this proceeding, a new hose clip (pinch) is to be used (see "Securing the tube connections" in the reassembling instructions). Reassembly Slip on the leads connecting to the boiler and install the sensor and the earth connection. Insert the insulating plate (10). Snap the angle elbow (3) into the upper housing and slip the tube (52) onto the connection stub in the upper housing. Insert the interlock and coffee switch with plug (16) into the holders, taking care not to break the connecting leads. Insert the connecting leads into the small cable lead on the backside of the shower head support. The coffee switch is to be fixed with the flat spring (19). Place the coulisse (15) onto the shower head support, the rectangular opening pointing to the front. The coulisse is to be turned in a left/right movement during which the piston is expected to move up and down. The sealing ring (18), if not provided, must absolutely be attached to the piston. Insert the pre-assembled shower head support into the upper housing, snapping the both square bars placed on the front into the regulating slot of the upper housing. Push in the lever (12) from the front side. Attention is to be paid to the fact that the pressure tube of the shower head support is not to be squeezed. Insert the steam pipe (21) into the chassis from the bottom, slightly turn and push until a snap is audible. Attach the pressure tube to the steam pipe and secure with the hose clip (pinch). The chassis (27) is to be hanged into the rectangular indentations of the shower head support. Now, push downwards and press until the chassis snaps in. Mount the motor (22) to the pump (24), apply the toothed belt (23) and slip on the connecting leads to the motor. Reconnect the tubes. Slip the sealing (6) onto the pump inlet stub, and hang the pump cpl. with the both dampers (26) into the chassis holders. Insert the sealing (6) into the boiler opening and press in the boiler filter (5) from above. Reconnect the tubes of the valve (33) as described above. Insert the switch-P.C.B. (34) into the valve and connect the 3 piece connector with the leads. The protective conductor of the mains lead is now to be slipped onto the earth connection of the boiler. 3064 - 8
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Service Information 3064
Place the lower housing (29) onto the upper part, leading all connecting leads and the mounted valve with the tube connections through the lower housing. Attention is to be paid to the fact that the leads or tubes are not to be squeezed. Fix the lower housing to the upper part by means of the four screws (28). Position the valve, displaced 45 degrees on the bayonet guidance in the lower housing, and turn it back 45 degrees until the valve snaps in. Attach the switch knob (30). Slip the 10-piece connector with leads onto the LED-P.C.B., and insert the P.C.B., in the lower housing. Insert the regulating knob (59) into the LED-P.C.B. in front of the housing lower part. Insert the cover-box (39) in the lower housing, leading all connecting leads past the side of the cover-box. Insert the control-P.C.B. (41) and the transformer (42) into the box. Slip the plug-in connections onto the P.C.B. The leads are to be wired according to sketch 2. Apply and fix the base plate (43). The density is to be tested (see separate description), and the function to be checked. Cable connections resp. plug-in connections, see separate sketch 3. Tube connections with terminals, see separate sketch 4. Securing the tube connections: When fixed with a hose clip (spring) (58), the latter is to be pushed over the tube. Slip the tube onto the corresponding connection stub and bend off the hose clip (spring) on the hose ends by means of flat nose pliers. Then, the hose clip (spring) is to be positioned at the height of the connection stub, and the hose ends are to be released. When fixed with a hose clip (pinch) (57), the latter is to be pushed over the tube. Slip the tube over the corresponding connection stub. Then the hose clip (pinch) is to be positioned at the height of the connection stub, the hose eyelet is to be pressed together by means of pinch tongs. Special tools Special pliers for Hose clip: Order number: 4889123
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Service Documentation
Service Information 3064
Density Test Insert the test filter, lock and place the carafe. The switch-off tab of the test filter remains open. Fill the boiler with water until the "min" mark is reached. Connect the device to the power mains and switch it on. Wait until the green control lamp lights up. Turn the switch knob to the "Cup" position. At first, let some water run through the test filter. Attention: The appliance is under pressure (>15 bar), be very careful with the next steps and keep some distance if necessary. Shortly afterwards (approx. 15 seconds), the pump motor is to run more and more slowly, and even to stand still. Now, the pump motor is switched off through the electronics. Leave the pump motor standing for about 15 seconds. No water is expected to be pouring out during this time. Note: If the pump motor continues to run slowly, this means more then 15 seconds, the system has a leak or the pump is defective. After a check, the switch-off tab is to be reopened, in order to decrease the pressure. Switch off the device and unplug it from the power mains. The water is to be emptied and the device to be recompleted. Special tool Test filter for density test Order number 4889024.
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Service Documentation
Service Information 3064
Measuring Points G- Boiler Heating The device is not to be connected to the power mains. "G" is to be measured on the detached plugs. Switch knob position "Dot" Resistor value: 14 Ohm +/- 5%. When varying or no values are obtained, the boiler component is defective. Reconnect plugs "G". F - Transformer Detach one plug "G" Connect the device to the power mains. Measure at the connections "F1" and "F3". Switch knob position "Dot". The transformer voltage is 24 Volt AC. When a varying value is obtained, the transformer is defective. Unplug the device from the power mains and reconnect the "G" plug. Connections
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Service Documentation
Service Information 3064
E/T - Control-P.C.B. - Operating Voltages Remove one plug "G". Connect the device to the power mains, push button off, the device is not on. Switch knob position "Dot". The voltage to be measured between "E2 (-)" and the wire bridge behind the plug "D" is 29 Volt DC. The voltage to be measured between "E2 (-)" and contact "T6 (+)" is 5 Volt DC. When varying values are obtained, the control-p.c.b. is defective. Unplug the device from the power mains and reconnect the ""G'" plug. C/E - Switch-P.C.B. Remove one plug "G" Do not remove plug "C". Connect the device to the power mains and switch is off, the device is not on. "C1 (+)/E2 (-)" and "C3 (+)/E2 (-)" are to be measured on the plugs. (Instrument > 50 kOhms/Volt) Switch knob position "Dot" C1/E2 and C3/E2- no voltages - > 4 Volt DC Switch knob position "Cup": C1/E2 and C3/E2- 0 Volt DC , no voltage Switch knob position "Steam":C1/E2 - > 4 Volt and C3/E2- 0 Volt DC, no voltage Switch knob position "Drop": C1/E2- 0 Volt, no voltage and C3/E2- > 4 Volt DC. When varying values are obtained, the micro switch is defective, or the micro switch is not operated by the valve cam, or the lead is interrupted. Unplug the device from the power mains and reconnect the ""G'" plug.
Connections:
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Service Documentation
Service Information 3064
Function check After exchanging the control-p.c.b., the potentiometer "P" must be adjusted in a way that the voltage from plug "E2 (-)" to the metal surface of the potentiometer (+) is 3...3.1 Volt. Remove the base plate and connect the appliance to the power supply. Turn the switch knob (30) to the basic position, symbol "Dot". The swivel support must be open. Connect contacts "T1" and "T3". Switch on the appliance. The buzzer beeps once, all LED'S light up No reaction. control-p.c.b. or LED-p.c.b. is defective or connecting wire is interrupted.
The buzzer beeps once and all LEDs light up. Open contacts "T1" and "T3". Turn the switch knob (30) to the Espresso position, "Cup" symbol. The buzzer beeps 5 x. On/Off - and Standby-LED light up. No sound. LED does not light up. Defective control-p.c.b. Potentiometer "P" is placed in one of the final positions.
The buzzer beeps 5 x. On/Off- and Standby-LEDs light up. Turn the regulating knob (59) for coffee specialties to the central position. Turn the switch knob (30) to the basic position. "Dot" symbol. The pump works with steam speed. On/Off- and Standby -LEDs light up. Does not work with steam speed, but LEDs light up. Standby-LED does not light up. Motor is defective or blocked. Motor circuit is interrupted.
The pump works with steam speed and On/Off- and standby-LEDs light up. Turn the regulating knob (59) for coffee specialties all the way to the left stop. LED/!\ lights up in addition. LED /!\ does not light up. Connecting wire leading to the LED-p.c.b. is defective,
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Service Documentation
Service Information 3064
LED /!\ lights up. Turn the switch knob (30) to the Creaming position, "Steam" symbol. The pump stops working and the Standby-LED must continue lighting up. LED does not light up Interruption or shaft circuit of the sensor, or the boiler temperature is higher than 50 °C.
The pump stops working, and the standby-LED continues lighting up. Turn the switch knob (30) to the Water position, "Drop" symbol. LED/!\ may not light up when the boiler is cold, extinguishes LED /!\ lights up. Defective boiler group or line interruption.
LED /!\ does not light up: extinguishes. Connect the contacts "T1" and "T3". Now, the boiler heater can be switched on in order to test the power consumption. Attention: Danger of overheating! The relay must be heard to operate. Power consumption (1000 watt). Relay does not switch. No power consumption. Defective control-p.c.b. Defective boiler/group.
The relay switches and the power consumption is correct. Lock and re-open swivel support. Insert coffee filter and close swivel filter. Interlock/coffee switch is operated. All LEDS extinguish. No reaction. Defective interlock/coffee switch or line interruption.
All LEDs extinguish. The function test is concluded; the appliance can be operated in the normal manner.
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Reference Drawing 3064
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Reference Drawing 3064
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Reference Drawing 3064
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Reference Drawing 3064
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