Engine speed control board
When kneading, the force of the oar is not constant. Madley take action. The mode of operation of the collector motor will become jerky, negatively affect the service life of the device, irritate, frighten the hostess, the quality of the test is mediocre. In order to stabilize the mode, the engine is equipped with a speed sensor. The gearshift works normally in idle mode without test. The kneading is just beginning, the turns are walking. A sure sign of failure of the sensor, the clock generator control circuit. Checking the first one is simple:
- Remove the cover.
- Disconnect the sensor from the power supply, control board. Find the connector with three wires.
- Caution, to avoid getting an electric shock, plug the stationary mixer into an outlet.
- Turn on the first speed.
- Measure the sensor output voltage.
- Repeat the procedure for the available speeds.
The indications are new every time. The condition is met. Next, the power / control circuit of the pulse generator microcircuit is checked. Finally, it is allowed to connect a voltmeter in parallel with the motor and remove the voltage there, if the motor revs, the problem is hardly localized.
The board is repaired in the usual way. often visually Observe the burnt out elements: they turn black, contacts, the case melts. Defective capacitors will swell. Electrolytic on the top of the cylinder with a cruciform groove. In the event of a fault, the capacitor bends outward. Peeling off the mounting is common. Check tracks for integrity.
The main types of faults are listed. Microswitches break at times. The speeds are controlled in steps by a mechanical contactor. Disconnect from the stationary mixer control power board, ring in each position. over, you should measure the insulation resistance, which is at least 20 megohms. This is done for a simple reason: incorrect supply of commands to the power board, control of a stationary mixer will cause an unpredictable result. It takes a long time to find a fault, where there is no breakdown, when it is easy to understand the cause at the beginning.
The mixer device is sometimes supplemented with a fuse. It is clear, you need to start here. Distinguish between fuses that pass current only in case of failure of other elements of the board and those that are included in the motor power circuit. In the first case, to indicate the elimination of a failure in the terminals, turn on the incandescent light bulb. Lights up, it means we are continuing the search. In the second case, the described technique will NOT work. Manufacturers replace fuses with low-impedance resistors that burn out in the event of board failure, while limiting the breakdown current is the best protection. However, the method obviously leads to losses in the power circuits, suitable for fuses regulated by varistors.
We hope that now it will NOT be too difficult for readers to fix the mixer with their own hands while blindfolded. Meet the difficulty. Remove the bandage.
Repair of small household appliances, which includes the mixer, many users prefer to do on their own. Indeed, it doesn’t matter which company you use the device. Braun or Scarlett, its internals are pretty simple. However, when disassembling THESE simple instruments, certain difficulties can arise. How to disassemble a mixer if it looks like its body is non-separable, like, for example, many Bosch models? Let’s try to figure it out.
Stationary mixer device
Self-repair of mixers requires general knowledge of the internal structure. Manual models just contain a motor inside, stationary ones are more complicated. Consider do-it-yourself mixer repair.
How to disassemble bosch mixer 450w
Let’s discuss stationary mixers today. Devices show advantages and disadvantages. Globally stationary mixers are used Handle large quantities of products, avoid confusing units with hybrid models: a handle equipped with a motor, plus a bowl for chopping products, shredding. An unconditional merit of standard tabletop devices is considered a longer operating time. Housewives burn mixer motors with their own hands, since there is no protection against overheating inside. Stationary models are equipped with a speed regulator, you cannot say: we just see a motor. Do-it-yourself mixer repair is devoid of difficulties for those who managed to get the components.
Major malfunctions
First, we will consider in what cases it is necessary to resort to disassembling and repairing the mixer. Frequent malfunctions of the Braun mixers (Brown), Scarlet, Bosch, Ros and the second are the following:.
- Breakage inside the voltage supply cord. This defect can occur due to poor quality insulation. Frequent bends when folding the cable for laying in a box lead to a violation of the internal insulation and short-circuit of SEPARATE cores of the boundaries.
- Problems with the start button. A common problem with Brown mixers. If it sticks, then it is necessary to dismantle it and troubleshoot in case of serious breakdown. Install new button.
- Electric Motor: There are many options here, the simplest one. Malfunctions can be due to brushes, which have worn out and lost contact with the rotor. One or more speeds are not working: the root cause may be a defective switch. Its contacts from frequent use can burn or oxidize. The renovation is pretty simple. It is necessary to remove the regulator and inspect the contacts, if necessary, clean it, and if the wear is complete, then replace.
- Extraneous noise. There are only two options here: bearings and no grease in the gearbox. We check the rotation of the bearing, if there is a ringing, then we need to lubricate them, and a backlash appeared. Replacement only. In the gearbox, due to the influence of kinetic energy, lubricant can accumulate on the ends of the worm gear. Gently distribute it between the gears with a screwdriver sting and make a few turns. Extraneous sound will disappear.
Knowing the typical failures of a hand or planetary mixer, you are free to repair the product yourself. You don’t need any special tool for this. The main thing here. This is caution, patience and basic knowledge of product design.
The nuances of disassembling mixers
Before you repair the product with your own hands, you need to disassemble it. There are certain nuances that you need to know in order not to damage the device.
- The body of the mixer is made of strong injection molded plastic, it has many special protrusions and hidden plastic clips, which can be damaged if handled carelessly.
- All constructive grooves reliably cover plastic plugs, which must be pry off with a thin screwdriver. So, for example, in the Braun Turbo 600 watt mixer there is a gap around the body, which must be gently pulled apart to get to the latches.
- The fasteners are hidden under the self-adhesive label and stickers, to detect them, they will rather press on the surface, then remove part of the sticker and Unscrew the screw or self-tapping screw.
- There are also plastic latches in the case design, which must be handled very carefully so as not to break.
- After opening the device, take a photo so as not to confuse the connection of the wires during assembly. Each node must be installed in a specific place.
- Often the connection of the wire to the terminal is tight enough to remove them. Use a screwdriver or special tools. Do not pull them together by hand so as not to disrupt the structure.
- If the wire fits under the fixing screw, then the latter must be loosened, and checked during assembly. Is there an exposure of the area outside, only then fasten the screw.
- Disassemble the gearbox only if a malfunction is detected, in other cases, only replace the lubricant.
- Check damping sleeves for integrity. If there are minor violations of integrity, then immediately change.
- Extraneous noise. This is the wear of the bearings, in order to replace them, you need to know the device design and have certain skills.
- After eliminating the breakdown, the assembly process is carried out exactly the opposite of dismantling.
If you find complex breakdowns, immediately contact the professionals, they will repair the mixer Brown, Bosch and any second quickly, with reliable quality.
Stationary mixer gearbox
The gearbox looks like an impressive part of the stationary mixer. Inside, under a cover in the front, above the rod of the oars of the reinforcement with bolts, there is an aluminum or plastic casing that hides a set of gears filled with grease. Pay attention to the complexity of the drive, pay due attention to maintaining the gearbox in good condition, it cannot be repaired, you will have to change gears, seals, bearings. Let’s briefly list the fillings:
- The main shaft is equipped with a drive gear, which has chosen a pin.
- The floor is a pressure bevel gear with a profile cutout for the pin, fixed on the shaft with an O-ring.
- The drive gear is in contact with the side transmission directly driven by the motor shaft.
- The inclined gear is pressed by a pair of inclined side gears, if necessary, adjusted by the screw of the front part of the head of the stationary mixer. Allows you to eliminate backlash, adjust the vertical position of the paddle.
- Finally, the lateral transmission gear is formed by two wheels sitting on the same shaft. It will allow you to reduce the rotation speed, while increasing the power.
The lateral drive gear is suspended by two bearings, the structure is sealed on the sides with washers. To prevent oil from filling up the planetary gear, the shaft is fitted with a slight interference fit. The disassemblers are easily knocked out of the seat with a soft hammer (mallet). The planetary gearbox was mentioned. A cover, inside which the pinion shaft transmits the movement of a pinion gear rotating around it, equipped with an oar. Allows the blade to spin, rotate around the center of the drive shaft.
It is pertinent to describe the correct adjustment of the paddle position. The chair of typical stationary mixers is thrown backward from the bowl. There is a small screw on the loop on the front side, twisting and adjusting the position of the oar. Important as a stand mixer is more often supplied with a bowl. The paddle should not touch the material of the vessel; avoid leaving the gap too large. Americans use a dime (10 cents) to adjust. Russian measures are offered by the ruble. The coin is placed on the bottom of the bowl and low speed is activated. The paddle should sometimes touch the money slightly. Adjust the height with the mentioned screw.
There is vertical backlash. Check by hand in the off state, the screw of the front part of the head of the stationary mixer is tightened. The operation will probably be required after the repair, the inclined gears (at least one) are on the gear case.
Major malfunctions
First, we will consider in what cases it is necessary to resort to disassembling and repairing the mixer. Frequent malfunctions of the Braun mixers (Brown), Scarlet, Bosch, Ros and the second are the following:.
- Breakage inside the voltage supply cord. This defect can occur due to poor quality insulation. Frequent bends when folding the cable for laying in a box lead to a violation of the internal insulation and short-circuit of SEPARATE cores of the boundaries.
- Problems with the start button. A common problem with Brown mixers. If it sticks, then it is necessary to dismantle it and troubleshoot in case of serious breakdown. Install new button.
- Electric Motor: There are many options here, the simplest one. Malfunctions can be due to brushes, which have worn out and lost contact with the rotor. One or more speeds are not working: the root cause may be a defective switch. Its contacts from frequent use can burn or oxidize. The renovation is pretty simple. It is necessary to remove the regulator and inspect the contacts, if necessary, clean it, and if the wear is complete, then replace.
- Extraneous noise. There are only two options here: bearings and no grease in the gearbox. We check the rotation of the bearing, if there is a ringing, then we need to lubricate them, and a backlash appeared. Replacement only. In the gearbox, due to the influence of kinetic energy, lubricant can accumulate on the ends of the worm gear. Gently distribute it between the gears with a screwdriver sting and make a few turns. Extraneous sound will disappear.
Knowing the typical failures of a hand or planetary mixer, you are free to repair the product yourself. You don’t need any special tool for this. The main thing here. This is caution, patience and basic knowledge of product design.
The nuances of disassembling mixers
Before you repair the product with your own hands, you need to disassemble it. There are certain nuances that you need to know in order not to damage the device.
- The body of the mixer is made of strong injection molded plastic, it has many special protrusions and hidden plastic clips, which can be damaged if handled carelessly.
- All constructive grooves reliably cover plastic plugs, which must be pry off with a thin screwdriver. So, for example, in the Braun Turbo 600 watt mixer there is a gap around the body, which must be gently pulled apart to get to the latches.
- The fasteners are hidden under the self-adhesive label and stickers, to detect them, they will rather press on the surface, then remove part of the sticker and Unscrew the screw or self-tapping screw.
- There are also plastic latches in the case design, which must be handled very carefully so as not to break.
- After opening the device, take a photo so as not to confuse the connection of the wires during assembly. Each node must be installed in a specific place.
- Often the connection of the wire to the terminal is tight enough to remove them. Use a screwdriver or special tools. Do not pull them together by hand so as not to disrupt the structure.
- If the wire fits under the fixing screw, then the latter must be loosened, and checked during assembly. Is there an exposure of the area outside, only then fasten the screw.
- Disassemble the gearbox only if a malfunction is detected, in other cases, only replace the lubricant.
- Check damping sleeves for integrity. If there are minor violations of integrity, then immediately change.
- Extraneous noise. This is the wear of the bearings, in order to replace them, you need to know the device design and have certain skills.
- After eliminating the breakdown, the assembly process is carried out exactly the opposite of dismantling.
If you find complex breakdowns, immediately contact the professionals, they will repair the mixer Brown, Bosch and any second quickly, with reliable quality.
How to disassemble a mixer for DIY repair
Repair of small household appliances, which includes the mixer, many users prefer to do on their own. Indeed, it doesn’t matter which company you use the device. Braun or Scarlett, its internals are pretty simple. However, when disassembling THESE simple instruments, certain difficulties can arise. How to disassemble a mixer if it looks like its body is non-separable, like, for example, many Bosch models? Let’s try to figure it out.
Features of dismantling a Bosch mixer
The disassembly process is carried out using a similar technology for Braun mixers, Zepter and was described above, but specific products from different manufacturers have peculiar, albeit small, nuances. In this section we will tell you how to disassemble a mixer from Bosch Turbofixx 400 watt:
- Disassembly begins by removing the end cap;
- Next, we disassemble the product body;
- Remove the top cover and put it aside;
- Then we will carefully disassemble all the components of the device into separate parts;
- Disassembled device Place on a clean table;
- Disconnect the wire terminals from the engine;
- Now carefully remove the fixation and dismantle the devices where the nozzles are inserted;
- We check the operation of the engine, if everything is in order, then we start the assembly in the reverse order, we lubricate the shaft for high-quality work;
- All breakdowns are eliminated during assembly.
Repairing a Bosch mixer will help one where not only the algorithm for complete disassembly is shown, but attention is focused on frequently breaking parts, and options for their repair are given.
Dismantling the submersible model
The hand blender consists of 3 main parts: a spindle motor and a control unit (board). Its repair is reduced to replacing the defective part and removing contamination. Let’s see how to disassemble the Bosch MSM 7700 model.
To do this, we need a small flat screwdriver with a wide thin tip or a penknife with a thin blade. And also a small hex key 3-4 mm. If there is no such key in the household, you can try using a Phillips or flathead screwdriver of a suitable size instead.
As a workout, let’s start with the simplest. Removing the small panel from the handle of the device. It is quite easy to pry it off with a screwdriver and snap it off. Under it we will see two self-tapping screws, which must be carefully unscrewed with a hex wrench.
With the back case, everything is a little more complicated and you need to be extremely careful not to break anything. It is not worth the effort here, but it is important first to understand what exactly holds the cover in engagement with the body, and in which direction it moves.
Having coped with this task, we find two more self-tapping screws inside, which also need to be unscrewed in order to continue further disassembly. Having carefully examined the edges, we will notice that the two halves of the case hold a few more latches, which can be easily snapped off with a flat screwdriver and finally gain access to the electric motor and control board of the submersible blender.
Trouble-shooting
As mentioned above, you can repair the damage yourself only by replacing the faulty components. To do this, you need to carefully inspect all elements and connections of the control board for swelling, oxidation or melting. It is also advisable to check all suspicious nodes with a tester.
First of all, pay attention to the fuse.
This fuse is designed for 100 operations, after which the device itself returns to its original state after a while and continues to function normally. If the resource of the fuse is completely exhausted, it must be replaced with a similar in characteristics.
Disassembly features
There are two types of blenders: hand-held (submersible) and stationary (tabletop). To disassemble the desktop version, you may need a wrench or screwdriver, depending on the type of mountings on the bottom case cover. In this case, everything is simple: screws or nuts are unscrewed, and the cover is removed, giving access to the internal device.
With immersion blenders, the situation is more complicated, since their external fasteners are often fragile plastic latches, the location of which is not known in advance, and the internal components can be additionally fastened with screws, self-tapping screws or bolts.
Dismantling Bosch blenders
It makes sense to try to fix a broken Bosch blender yourself if its free warranty repair has expired. And only if you yourself are at least a little versed in electronics and electrical engineering, know how to use a tester and a soldering iron. But first you need to disassemble it, and not completely break it. So how do you do it?