PARKSIDE PABS 20-Li B2-2 Charger - Burnt Transistor Resistors: Repair Possibilities

Question

Hello and welcome! I have a problem with the charger as in the topic. After the winter, it was connected to the socket, but after installing a battery for charging, it unfortunately stopped working. After disassembling it, I noticed that the resistors on the transistor were burned so much that...

wiertacz · Answer

I do not have such a charger, but from the photo I can see that these resistors are connected in parallel and are connected to the source of the transistor, so preventively check this transistor if it is damaged, or rather it will be damaged.
The resistors did not burn for a reason. The transistor will probably be punctured and all the current has gone through the resistors which acted as a fuse.

Przemek22tex · Answer

I also have a problem with this charger.
When connected to the mains, the red LED indicates charging, even though there is no battery. After a dozen or so seconds, the green LED lights up, and then the red one again. I measured the voltage at the output and it is 21 V, but it drops to 13 V every now and then and increases again. When you insert a new battery, the charger indicates charging, but the output voltage is equal to the battery voltage.

Witek76 · Answer

IC1 is the OB2263MP system, here I will try to install SG6859ATZ - because I have one available locally. Resistors R7, R8, R9 have 1.5 Ω each. However, R9A had a different value, so a request to the col. Przemek22tex to give it to us. Your fault will probably be secondary, but I have to repair the primary one first. Resistors R20A and R20B (connected in parallel) are not damaged? What are the voltages on pins 2, 3, 5, 6 of the LM358G system?

zanellato · Answer

hello, I'm zanellato andrea, I have a charger to repair the model: PARKSIDE PABS 20-Li B2
I need the exact values of: r7-r8-r9-r9A ???
(they are burned, you can't see the value)
can you get them?

can you give me some advice on modification to make to avoid burning the resistors and the tranistor
Many thanks in advance!
Hello!

andreazanellat(malpa)tiscali.it

krzymowski.tomek · Answer

In my charger The resistors R7, R8, R9 are marked 1R5 or 1.5?. R9A = 1R0 = 1?.

zanellato · Answer

hi, thank you so much for your help !!!

Kaziko2Nowicki · Answer

Hello. Refresh the theme of this charger. Namely, in such a charger I burned two rectifier diodes on the secondary side (which are connected in parallel on the board), I would like to ask what the parameters should be because I replaced them with diodes that have 1A because I had them at hand, but unfortunately they get hot during the charger operation. I would also like to inform you about the parameters of the original LEDs ... Regards

jaeger · Answer

You need to use fast rectifying diodes, such as BYW29, MUR820. You could also solder a double diode, and maybe a single one with a fairly high allowable current.
Since the SR5200 used here has a maximum of 5A, a single diode would have to be for a current of at least 10A.
Additionally, the approximate calculation on the website http://schmidt-walter-schaltnetzteile.de/smps_e/smps_e.html shows that the diode peak current is about 10A.

I think it would be good to use a small heat sink for a single diode.

If you decide to solder two LEDs, they must be from the same production series.

BANANvanDYK · Answer

These chargers are apparently quite fail-safe. I add photos of my colleague's charger, I did not repair due to the lack of availability of the transistor, but I did not want to look for a replacement. It was a year and a half ago, LIDL changed its range and the new chargers do not fit the old power tools.

As it turns out, the batteries have a built-in BMS, so you can use any power supply (eg from other Chinese screwdrivers) with an output voltage of 21 V. I do not know about the current limitation, I used a laboratory power supply for charging.

Messij · Answer

I have this charger model and the problem that it stopped working after the fall, I have a multimeter but no knowledge of how to use it to check where the problem is, someone would be able to help guide something, after looking at the plate, you do not see any physical damage such as burns or something from fall ...

BANANvanDYK wrote:
As it turns out, the batteries have a built-in BMS, so you can use any power supply (eg from other Chinese screwdrivers) with an output voltage of 21 V. I do not know about the current limitation, I used a laboratory power supply for charging.

I also have an isdt q6 nano charger, in which I can set the DC power mode option, in which I can set 21.5V and 2.3A, I understand that I can charge this way too?

jaeger · Answer

This is most likely a mechanical fault. Examine the PCBs carefully under the magnifying glass, also take a look at the larger components and check if they are slightly loose. For example, the input filter could break and the connection of the winding wire with the pin was broken, or one of the paths could be broken.

Messij · Answer

Unfortunately, after looking at the plate with the flashlight and the magnifying glass, I did not find anything that would look loose or damaged. I was just hoping that something would simply be physically damaged somewhere and it would solder, unless something with this large yellow one was damaged (I do not have a concept of what it is called), but it probably won't be easy to get there due to the fact that I am a layman in these matters.

Padre76 · Answer

>>19580474 Won't charging the battery this way damage it.How long should I charge it to make it full?

zaradny2 · Answer

I confirm that these Parside chargers from Lidl are in great demand, probably 4 of them have gone up in smoke in the company for 1.5 years. I heard that the topic is known, some triac is falling apart and I can`t find it anywhere.
It is quite possible that the charger is being used inappropriately, and when reading the manual I see the following sentences:

Section of a user manual regarding battery charging.

My question is that I have Parkside 2A and 4A batteries and chargers that say 2.4A and 4.5A. Will inserting a 4A battery into a 2.4A charger damage it?

PARKSIDE PABS 20-Li B2-2 Charger - Burnt Transistor Resistors: Repair Possibilities

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