Repair schemes.

And who does not tell me where to get an electrical circuit diagram for a Panasonic SD253 or 207. Plizzzz

There are no schemes for these stoves. The manufacturer in the service manual instructs the service centers to replace boards without going into the intricacies of circuitry. And the very process of troubleshooting, according to the manual, is carried out by replacing the boards.

If you really itch, you will have to draw yourself.

There are no schemes for these stoves. The manufacturer in the service manual instructs the service centers to replace boards without going into the intricacies of circuitry. And the very process of troubleshooting, according to the manual, is carried out by replacing the boards.

If you really itch, you will have to draw yourself.

And also program the microprocessor yourself ...

O_o I knew it ... Well, thanks for confirming my guess.

Is the circuit needed to eliminate a specific defect, or in order to have it?

Well, for that, of course, too. Talk about the situation with Panasonic AMI yourself. (You need to try on your own). And now it is to eliminate a specific defect: the drive to the kneader does not work. That is, I pour in the food, turn it on, the heating goes on, but the kneader does not spin.

This address contains the service manual for the Panasonic SD 207.

SERVICE INSTRUCTIONS FOR PANASONIC SD-207 AUTOMATIC BREAD Maker

It contains a wiring diagram, as well as the resistances of the motor windings and a method for checking the operation of the motor in service mode.

Did you remove the bottom of the stove, the drive belt is intact, does the mixer rotate by hand? Turn on the check mode, you can even just turn on the oven in the "pizza" mode. Kneading should start (motor rotates).

If it does not rotate, you will have to disassemble the stove and see where the wires from the motor go to the board. Yes, undo and reconnect the connector that connects the motor to the board. Loss of contact in connectors is a typical malfunction.

The agitator turns by hand. Belt in place. I just didn't include it on pizza. Schaz download the instructions and see. Thank you very much. What happens, I will answer.

Well, for that, of course, too. Talk about the situation with Panasonic AMI yourself. (You need to try on your own). And now it is to eliminate a specific defect: the drive to the kneader does not work. That is, I pour in the food, turn it on, the heating goes on, but the kneader does not spin.

First, what kind of situations are you talking about?
And, secondly, did you have a stove before? Maybe it's just temperature equalization, it can be up to an hour, only then the shaft starts spinning, that's why they say that they would check it in the "pizza" mode, there immediately the kneading goes.

This is not my bread maker. I'm just doing renovations.

Is the circuit needed to eliminate a specific defect, or in order to have it?

Thanks for the instruction. In general, I also need it, because Panasonic AMI (bread makers) have not yet had to deal with. I should have come here earlier, it would have been much easier. And then I had to do a lot of unnecessary gestures. But in this case, (all these procedures about which you wrote, I did it, it did not help) I need a circuit of the electronic control board and processor. Is this even possible to find somewhere?

Stoves are not as common as TVs, for example. Therefore, they are rarely repaired outside of service centers. Maybe someone posted handwritten diagrams or parts of them somewhere, but where to look? Is that on the forums for the repair of household appliances.
If you have experience in repair, then, it seems to me, it will be faster and most likely to trace the connections on the board itself and draw the desired section of the circuit. Then upload it to this thread.

The controller does not directly control the motor.So you need to trace to which element the tracks on the board go from the motor connection connector. What is this element, its labeling?
By the way, is the resistance of the motor windings normal? It is better to check directly from the contacts of the disconnected connector.

Thank you, it's all true. Therefore, it is interesting that few people repair them. Here is just such a case. But thanks anyway for your participation. I'll try to rummage in one more forum.

Thank you, it's all true. Therefore, it is interesting that few people repair them. Here is just such a case. But thanks anyway for your participation. I'll try to rummage in one more forum.

Indeed, OLA, the advice you have been given is absolutely correct. First you need to check the engine itself. Up to the supply of the RIGHT VOLTAGE to it from an autonomous power supply unit (if the motor is not a stepper there, which is very unlikely). If it is serviceable, but the stove does not turn on for batching, then you need to look at the details of the circuit section to which the engine is directly connected. Apply voltage to the input through the resistor. Turned around? This is worse, since something is not being received at the input or not at all ... There may be several reasons. If the heater turns on according to the program correctly, but the motor does not, then most likely the central controller itself is in perfect order. It is unlikely that he will issue one command, and the other, which runs in parallel, will not. In short, the scheme for repair is not yet necessary, not everything has been tested yet from what can be checked without the scheme.

All this is true, but I need at least the nominal value of the thermistor so that I can check it by replacing it. And in general, of course, thanks for the advice, but this is not the first year I have been doing repairs and, in general, I know what to do if you understand me. But in any business, you need those materials and schemes that facilitate the work and improve it.

The thermistor rating is indicated in the service manual - 27 kOhm.
But in this case, the thermistor and the motor are not functionally connected.
Determine all the same, what kind of element controls the engine.

... those materials and diagrams that make work easier and better.

can easily not be found.
But if you're lucky and you find them, don’t take the trouble to put them in this thread. This will be the best "thank you".

This address contains the service manual for the Panasonic SD 207.

SERVICE INSTRUCTIONS FOR PANASONIC SD-207 AUTOMATIC BREAD Maker

It contains a wiring diagram, as well as the resistances of the motor windings and a method for checking the operation of the motor in service mode.

Thank you so much for the service manual. We really need a piece for the owners of all Panasonic bread machines. For example, I finally figured out why lately my bread is so low. Thanks again.

But if you're lucky and you find them, don’t take the trouble to put them in this thread. This will be the best "thank you".

Unfortunately, all my attempts ended in failure. More than what I received from you, I did not find anything.

Well, what about repairing the stove, did you find the reason for the lack of engine rotation?

Not yet. Can you tell me what the value of the thermal resistance should be at the beginning of the batch.

[saint-i-yazans]

Already suggested (see post dated January 30) - 27 kOhm at a temperature of 25 degrees.
Well, not saint-i-yazans functionally thermistor and motor. Digging in the wrong place.
I repeat once again - look to which element on the board there are tracks from the motor connection connector.
Are the resistances of the motor windings OK (see service instructions)?

The bread maker starts up when a certain resistance occurs on the thermistor when it heats up, at which the kneading starts (first, the stove heats up, and then the batch only turns on), so I need to know at what resistance rating the processor gives the command to start.

Not certainly in that way.
The batch is switched on after a certain heating time. Or the batch is switched on immediately in the "pizza", "accelerated baking" modes, ie, if you accept your theory, at a nominal value of 27 kOhm, the processor gives a command to start.
Digging hard in the wrong place.

Not certainly in that way.
The batch is switched on after a certain heating time. Or the batch is switched on immediately in the "pizza", "accelerated baking" modes, ie, if you accept your theory, at a nominal value of 27 kOhm, the processor gives a command to start.
Digging hard in the wrong place.

Yes, that is right. A thermistor is just a temperature sensor. By turning the heater on and off, the oven maintains the temperature set in the program, and the temperature sensor gives the controller information to generate an "on-off" command to the heater. The timer is ticking at the same time. When the timer expires, the PROCESSOR through the EXECUTIVE and POWER circuits gives a signal to turn on the electric motor. So you need to look at the EXECUTIVE and POWER CIRCUITS of the electric motor (if it is guaranteed to be in good working order).

Maybe we won't understand each other. I will explain the situation again. On the pizza, the kneading is in progress, but with the "main bread" program, it is heated, but there is no kneading. From this I draw the conclusion that the thermistor still plays a role, with a certain drop in resistance, it gives a command for mixing. If not, how? And what determines the degree of heating? And yet, in the service manual that you gave me, there is an item "test modes for quick check of functions" and so, they are not suitable for me, the stove is 253 and not 207. I just thought there would be similar schemes ..

The misunderstanding was promoted by your post dated 01/29/2008
Previously it was suggested to check the rotation in the "pizza" mode. Here's a quote from your answer:

But in this case, (all these procedures about which you wrote, I did, it did not help)

From this it was concluded that the engine does not rotate in any mode.
The heating mode can last up to 1 hour. Specific questions.
1. Does the display show the total time (4 hours) after selecting the "basic" mode?
2. There is a decrease in the counter readings after pressing the "start?
3. What happens when the meter is 330, 300?
4. Does the reading continue to decrease?
5. Is the batch in quick bake mode?

The command for mixing is given by a timer, the operation of which we see in the form of changing readings on the display, but not a thermistor.
The degree of heating is determined by the microcontroller, guided by a program wired into it, based on the data received from the thermistor. The degree of heating is kept constant within 35 degrees during heating and is not associated with the inclusion of a batch.

But you yourself say that the warm-up time can last up to 1 hour. After all, every time this time is different. If the time were constant, this is a completely different matter. How can a timer give a batch command? We do not set the time for the timer. And here's another quote from your answer:
The degree of heating is determined by the microcontroller, guided by a program wired into it based on data received from the thermistor
The logic of the processor is based on the parameters of the change in the thermistor at the moment. And the timer counts down the time through the impulse counter, which is regulated by the program embedded in the processor.

After all, every time this time is different.

This time is different in the sense that, in relation to the "main" mode, either 30 minutes or 60 minutes. But not 28 or 46 minutes. Only two values ​​- or 30 minutes. or 60 min.

How can a timer give a batch command?

Read the description of some microcontroller that contains a timer in its architecture. In short, at the end of the counting cycle, the timer gives the controller a signal called an interrupt. The controller processes this interrupt in accordance with the program. In our case, the controller gives a command to turn on the stirrer motor.

We don't set the time for the timer.

We select the operating mode of the stove, thereby indirectly setting the time for the timer through the parameters specified in the program for this mode.
Depending on the temperature in the kitchen, measured, naturally, with a thermistor, one of two sets of parameters will be loaded. T.That is, if the voltage at the input of the controller to which the thermistor is connected is below the threshold specified by the developer, one set of parameters will be loaded, above the other. This is the role of the thermistor besides maintaining the temperature.

If you are already so fixated on a thermistor that it prevents you from connecting a simple 27kOhm resistor instead, or, even better, a variable resistor and check the operation of the stove.

And, by the way, they did not answer the questions asked. They may seem simple and empty to you, but I would be interested to know the answer to them.

And further. Run the pizza program. There are two mixes during the program. Look, will the second batch start?

I am answering your questions.
1. Does the display show the total time (4 hours) after selecting the "basic" mode? - Yes displayed.
2. There is a decrease in the counter readings after pressing the "start?" - Yes it does.
3. What happens when the meter is 330, 300? - Nothing happens.
4. Does the reading continue to decrease? - Yes, it continues.
5. Is the batch in quick bake mode? Yes it goes.
As for "Pizza", there is an initial batch, but I didn’t wait until the second one, because we need to run the whole program.

Depending on the temperature in the kitchen, measured, naturally, with a thermistor, one of two sets of parameters will be loaded.

And why then does ten turn on when the program starts? and if the temperature in the kitchen is +15 degrees?

connect a simple 27kOhm resistor, or, even better, a variable resistor and check the operation of the stove.

This is understandable, I was interested, maybe you already know exactly at what resistance of the thermistor the start-up takes place. But I will of course check with another resistor.

[second batch]

And why then does ten turn on when the program starts? and if the temperature in the kitchen is +15 degrees?

The heating element at the start of the program turns on literally for a split second. Do not believe it - look at the current consumed by the stove. This is enough for the heating temperature to be established within a short time due to thermal inertia.
If the temperature in the kitchen is +15 degrees, the kneading will start in 30 minutes, the display will show at this moment 330 - the time until the end of the program.

As for "Pizza", there is an initial batch, I didn’t wait until the second one, because I need to run the whole program.

It is important that second batch, because it is the timer that gives the command to it. The first batch in this mode, as in the accelerated baking mode, can be controlled by the controller without the timer. The controller does not yet simply load data into it and, accordingly, does not wait or receive a signal from it about the end of the cycle.

Now you want a funny story? She EARNED !!! The fact is that before me this bread maker was in the hands of other masters (in the service center). The warranty has already passed, so the guys disassembled it, poked it with a tester and said that it was the processor. Well, I decided to take a look too. I disassembled it, looked it up, poked it with a tester too, assembled it ... does not work. Then (began to correspond with you) you send me a service manual for the Panasonic 207 and I decide to test my bread maker using test modes of quick function tests. But my Panasonic 253 !!!! And nothing works, I played a little on the buttons "Waltz Boston" and after that - lo and behold - she began to work
Thank you for your advice, it was very pleasant to talk to you.
But the thermistor also plays an important role here.

Well, now a little nuance: if the stove, which had been junk before, suddenly started working on its own, there is some possibility that this phenomenon will happen again someday. But it may not happen again! "Maybe", after all, sometimes it works.

But the thermistor also plays an important role here.

Eh, who would have doubted!
In fact, playing the keys eliminated a certain software plug.

In fact, playing the keys eliminated a certain software plug.

I thought so too. Thanks for the informative conversation. Can I contact if what?

Contact, but if not on the topic, then write in a personal or email.

It has been quite a while since the last reply in this thread. Has the service manual appeared on the latest 254, 255 models?

By the way, if you're interested, the combination of going to the service menu in model 255 (probably in 254) is "Program" + "Size" + "Timer". Now I don’t remember everything. I remember exactly that "Program" is a lifting mode, that is, maintaining a temperature of about 35 ° C. In general, there are all the modes described in the service manual from the 207 stove. But in addition there is a sound signal test, and two more engine tests, how they differ, I still do not understand.

I can give a link where there are many service manuals, but they are paid.

Guys, I read your correspondence with interest - I really have a different HP, but the problem is exactly the same !!!! Similarly, the kneading does not work, but the timer counts down and bakes as usual! The drive belt is intact, we also disassembled it and looked from the inside, it has been with us for a very long time ... I did not find repair shops in our city, I have to knead it myself, and bake in the oven. During the last such kneading, I broke the mixer: (Now I don't even know what to do ... It is very, very difficult to knead with your hands ... Help at least someone, I don't want to part with my Hitachi (she's almost a family member. ..) Hitachi HB-B100.

[the city]

How can I help? Search in your the city service center for the repair of TVs or cell phones. Perhaps one of the repairmen will agree to help you. Someone in your city is repairing radio equipment.

Check the thermistor.

The bread maker has regular program failures (10-30 minutes). Accompanied by the flickering of the monitor, at this moment the stirring stops. Light tapping on the body will revive the stove. there is a suspicion of a banal non-contact in the schematic. The stove is after the warranty period, so the disassembly does not affect the service. If anyone shares the service manual, I would be very grateful.

[wowanich]

wowanich There is no manual on the network, if there is only on request for "babos", here on the forum there is a model for 207, but this, as they say, "two big differences"

SERVICE INSTRUCTIONS FOR PANASONIC SD-207 AUTOMATIC BREAD Maker

There are no disassembly problems.
Just start taking apart.
But if you are afraid, then try to disassemble yours and take photos.

Lift the cover, unscrew 5 screws.
You unscrew the two screws on the back, on the power cord.
Carefully (I used an unnecessary plastic card) you break off the entire upper part of the bread machine in a circle. It is fixed with latches.
Gently slide the unfastened upper part back a little, you see two trains. Both are gently undocked from the bottom board.
You take off the top.
You put the stove on one side, unscrew 4 screws (legs) Take out the whole interior of the stove. Caution wire! (just, beforehand, you push it inside the oven)
All disassembly!

There she is Service manual Panasonic SD-255

And where can I get the service manual for 255? There is nothing on the transition

[zabu]

zabu, Try here https://Mcooker-enn.tomathouse.com/in...&task=view&id=190, as an option to help Electrotan 🔗
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