In detail: fubag in 160 DIY repair from a real master for the site my.housecope.com.
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The Fubag in160 is similar to the GYSMI 161 circuitry.
I continue to repair IN160, the NCP1055 microcircuit was replaced from another batch, dead transistors Q11S02 = Q11S01 = BSR14, replacement from a donor, dead optocouplers U12X01, U41X01. The duty room started up, the fan is spinning. The S17LITE05 processor does not issue a PWM signal, therefore the power section does not start. I took off the force, unsoldered the comb, I did not find any broken elements.
Does anyone have a power section diagram?
S17LITE05 was thrown from the donor, there are no changes, not the fact that it is whole.
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Basically, devices with defective microcircuits do not react in any way to attempts to turn on, but there were rare cases when Fubag IN160 inverter shutdown with warm-up, after a few seconds it turned on, then turned off again, and clicked. In this case, it turned out to check the microcircuit by turning on the device and, while clicking, gently leaning a cotton swab moistened with alcohol against it, the clicking immediately stopped and the inverter worked normally until the alcohol dried out.
Sometimes, after opening the device and external examination, such defects of the NCP1055B microcircuit are visible, one might say, with the naked eye.
Often the microcircuit breaks down, by itself, without affecting the vital surrounding elements. Something she has personal problems with the tightness of the case. In such cases, it is sufficient to replace only the microcircuit. We will consider this option.
First of all, we will clear the place from the killed microcircuit.
It makes no sense to put it in the SOT-223 case again, since they are unreliable. Better to somehow contrive. and receive the FEATHER BIRD. no set the microcircuit to DIP-8.
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Video (click to play). |
Comparing the conclusions of this microcircuit by the datasheet, we bend them in this way.
If everything is done correctly and the surrounding components are intact, which is better to be sure by using the circuit in advance and checking them, then the device turns on immediately and works great.
On the forums, you can find options for replacing the NCP1055B with the TNY268 with a slight alteration of the circuit.
remont22
Posted 02 April 2011 - 01:57
PWM NCP1055P100.
From another forum.
I fixed another dead body, with an "improved" duty feeder on the NCP1055 which constantly explodes.
In general, this product can be exchanged for a TNY268 in a DIP-8 package. I soldered it onto a small breadboard, and connected it to the circuit with short conductors. How to do this is clear from the comparison of the documentation for these 2 mikruhi. The bypass kander (10mk) is changed to 0.1mk. A source.
Which option to choose is at your discretion.
Attention!
Be careful when repairing the welding inverter with your own hands, the responsibility lies with you.
Repair of welding inverters from Fubag and other manufacturers.
Welding inverters Fubag often brought in for repair with accompanying comments - “turns on but does not cook" or "works but no current“.
These models have a very peculiar design of the power unit.
In most cases, the racks coming from the secondary winding of the power transformer burn out. In this case, the device stops cooking, as they say “no current“.
So that the current appears, it is necessary to restore the connection between the rack and the power unit board, in other words, solder it.
It's easier to say, to make it a little harder.
Firstly armed with this gadget: Glowing Soldering Iron.
We unsolder the board from the power unit.
Now we have gained access to all the torn off and burnt-out racks, we can proceed to the restoration.
The Fubag inverter restored in this way can still serve its owner.
Attention!
To avoid complications when repairing a welding inverter with your own hands - be careful, all responsibility is on you.
Repair of welding inverters from Fubag and other manufacturers.
More on the topic:
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- Repair of the welding inverter FUBAG IN160 [1]
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2. diggerweb (14.06.2015 17:37) It depends on how it burned out.
This is the Fubag IN 190 power unit.
The area under the pillar of the power unit burned out. The white layer under the foil is the intact heat-conducting coating, the dark area is burnt down to the radiator.
The burnout area is smeared with transparent silicone and a piece of mica is glued on top. Silicone is a common sealant, it does not burn or melt from high temperatures when we solder the rack. I used the silicone that comes with the repair kit for restore TV remotes, Something like that.
After all this has dried to the surviving foil, we solder a copper patch and a stand to it. The transistor had to be moved a little, since the space allowed.
And this is Fubag IN 160, here the situation is hopeless - the heat-conducting layer burned out not only under the rack but also under the transistors, this is already in the trash.
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- disassembly. dust cleaning. disconnection of boards. replacement of diodes soldering racks. replacement of power outlets. connection of boards. filling with varnish. assembly. examination.
- disassembly. cleaning from dust and dirt. separation of boards. assembly. filling with varnish. test at the stand.
- potentiometer knob
- disassembly. cleaning. replacing a ceramic resistor with two in series. replacement mic-we ncp1055. replacement of a 24v 0 / 3a cooler.
- the apparatus is tested with a ballast and an electrode.
- disassembly. cleaning. ncp replacement. resistor replacement. check on the ballast and on the welding table.
- assembly.
- replaced by:
- resistor 47ohm 5w
- ncp1055
- filled with varnish
- diodes stth 4
- 2 pcs. from a donor.
- disassembly. cleaning. installation of diodes and soldering of the control board.
- check on the ballast and on the welding table.
- disassembly. identification of malfunctions. rectifier malfunction.
- assembly. ballast check. 140 a. check on the welding table.
- replacement diode stth 2003
- replacement
- replacement ims ncp1055
- 5w47om resistor replacement
- output diodes for replacement. repair of a network cable.
- igbt replacement-1pc
- replacement ncp1055
- filter capacitor replacement
- preventive cleaning, dismantling-assembly of the unit with replacement of the capacitor of the mains filter and restoration of the burnt seal
- elimination of track closures along the UPS + 5v circuit, replacement of two transistors for switching on the relay and replacement of the charging resistor
- check on ballast and welding table
- no limitation (replacement of the current regulator with a switch)
- replacement of the current regulator with a switch
- Fubag IN 160 refers to budget single-phase inverters. Hence, it is suitable for working with cast iron and low carbon metals. Domestic technical data sheets indicate that the apparatus cooks galvanized steel and alloy steel, in practice the seam is far from ideal. Therefore, it is better not to experiment.
- The main problem of the designers during the creation of the device was to reduce the weight and dimensions. The resulting inverter is the smallest in the entire range. This is convenient for high-altitude work.
- The manufacturer tried to provide the most multifunctional device for a minimum of funds. In addition to classical welding, the possibility of argon-arc welding is provided, there is a HOT-START function, which simplifies the occurrence of an arc. The ANTI STICK function is responsible for preventing the electrode from sticking to metal.
- For the convenience of work, a visual display is installed that shows the current strength. There are warning indicators.
- The face shield is the most interesting accessory in the package. It is equipped with an electronically controlled liquid crystal display. Darkening occurs only at the moment the arc occurs. Therefore, it is not necessary to constantly take off and put on the mask. All electronics are powered by a solar panel.
- The price ranges from $ 300 to $ 350.
- operating voltage - 220 V,
- current strength - 10-160 A,
- uninterrupted operating time of 6 minutes with a current strength of 160 A,
- diameter of electrodes - 1.6-4 mm,
- dimensions - 42x17x37 cm,
- weight - 4.2 kg, with additional accessories - 6.3 kg,
- idle running of the transformer - 75 V,
- protection - IP 21.
- inverter housing,
- holder,
- power cable,
- grounding cable,
- carrying strap,
- case for transportation,
- mask.
- after assembly, the power cable is connected to the mains,
- the device is started by the start button, it also regulates the current strength,
- You need to turn on the inverter only once and until all the work is completed, the constant on-off of the device leads to a quick breakdown of the regulator.
- select the mode, conventional or argon welding,
- install and fix the appropriate electrode,
- install grounding,
- try out the arc,
- make a seam,
- let the seam cool down,
- knock down the scale.
tehsvar (30 March 2014 - 16:53) wrote:
Add what is the denomination of the green resistor, N55B burned out and burst
The manifestation of a malfunction according to the owners: does not work
What preceded the breakdown: suddenly, banged during work, repairs in a third-party SC and short-term work, plugged into an outlet clicked and stopped working
The following problems have been identified at various times: malfunction of the rectifier circuits of the welding current. malfunction of the power supply circuit of the primary circuits of the inverter; malfunction of the welding current circuits; malfunction of the welding current rectifier. malfunction of the current adjustment potentiometer; malfunction of the main board; malfunction of the power supply circuits of the power section control circuit;
Work performed: repair of welding current rectifier circuits; repair of the control circuit of the power unit; fan replacement; repair of power supply circuits;
replaced 1 diode, fan, in total 5 racks were soldered - I separated the board 2 times and soldered
check on the ballast and on the welding table.
on ballast norms, the electrode burned.
assembly. ballast check. check on the welding table.
In this section, practical cases of repair from our service center
Be careful! The information provided should not be taken as a guide to action, since in the event of an attempt to repair complex electronic devices by unqualified personnel, various negative consequences may occur.
Today the stores offer a wide range of inverter welding machines. One of the most popular is the inverter in 160 fubag scheme.
This device is a single-phase welding inverter, suitable for carrying and ventilation.
The presented machine produces welding using electrodes and direct current.
With this welding machine, you can weld all kinds of electrodes from rutile to stainless steel.
As for the voltage required for the operation of the tool, it is 220 volts.
In order for the device to perform its direct functions, it must be connected to a 16, 20 or 25 A socket with a voltage of 220 volts.
Then you should attach the earth clamp and the electric holder to the inverter, guided by the information about the polarity, which corresponds to the type of electrode used.
The device will turn on the moment the potentiometer is set to the required current.
The scheme - inverter in 160 fubag can work in two modes - MMA and TIG. When applying the first mode, do not forget to follow the existing welding rules.
In addition, do not turn off the device immediately after stopping welding, leave it on in order to allow it to cool sufficiently.
When the yellow indicator lights up, it means that the thermal protection has tripped. Please note that the cooling period for the tool is approximately 5 minutes.
Using TIG mode, connect the clamp of the earth cable to the socket with positive polarity and insert the valve torch into the socket with negative polarity.
Then connect the gas hose from the cylinder to the tool and set the required pressure. After that, proceed to adjust the desired intensity using the potentiometer.
Remember that during the operation of the welding machine, the inverter in 160 fubag diagram cannot be viewed at work. Certain safety rules must be followed.
Always wear protective clothing, mask or goggles and other protective equipment when using the tool to avoid damage to skin and eyes.
In addition, do not under any circumstances come into contact with exposed inverter cables that carry current, as well as with the electric holder and the surface to be welded.
Moreover, do not allow contact with water while using the tool, as well as fumes and gases generated during the welding process, as they can harm your health.
Among other things, take care not only of your own safety, but also of the safety of those around you, so make sure that there are no other people on the work site.
These are basic safety rules. You can familiarize yourself with all existing standards in more detail by carefully studying the instructions for this welding machine.
Low-cost models of welding inverters are distinguished by a limited period of uninterrupted operation and a rather narrow specification of currents. Therefore, when choosing such a welding machine, it is necessary to weigh the pros and cons. Consider a model from the German manufacturer Fubag IN 160.
It is impossible to draw a conclusion based only on reviews, so we will carefully dwell on the capabilities of the inverter:
If everything is clear with the main characteristics, then let's talk about the protection class in more detail. IP marking is a uniform worldwide standard. The first number means protection against mechanical stress, the second - against water penetration. Given the sophistication of the Fubag IN 160 at a relatively inexpensive cost, it is obvious that the manufacturer should have saved money. The second class of mechanical protection implies that the main working elements of the inverter are protected from the effects of objects with a diameter of 12 mm and above. The first class of moisture protection means that the device will withstand several vertical drops, therefore, you need to work in well-ventilated rooms, away from water sources.
It should be noted right away that the cables are very short, both power and ground. Therefore, they either have to be replaced, or a certain equipment upgrade must be carried out. Another major problem is the lack of a fuse. It will be solved by using an extension cord with automatic shutdown. It is better to set the RCD at 25 A, standard 16 A will not withstand and in case of overheating of the device or a strong voltage surge, the coils of the inverter will burn out to the ground.
The average welding current is 115-125 A, in this mode the Fubag IN 160 inverter works for 10-12 minutes. After that, the device must cool down without fail. In summer it is at least 15 minutes, in winter 5-7 minutes. The device must cool naturally, no fans, air conditioners or even more extravagant means can be used.
Post has been editedROMAN-WELDER on: 30 March 2014 - 11:55
