[Solved] Bosch SMV53L50EU - what is the SMD Marking LLW, LKW transistor?

Hello
I am asking for help in finding out what a transistor it is, because it is probably not a triac. It controls the operation of the water jacket solenoid valve (300V DC coil). It says LKW 66, and what replacement can I insert here?

Please
Marking LL W = PBHV9050T
Marking LK W = PMBTA45


Marking LK...MBTA45.pdf Download (244.56 kB) Marking LL...V9050T.pdf Download (195.81 kB)

This is what this element looks like.

Ok, but surely, because Bosch has been giving a damn like this lately. The worst company in household appliances. How can a DC solenoid be used! So how can you use a 54V pump in a dishwasher? How can you use a washing pump integrated with a hopeless heater? They will remember ... crap. Let's make them "famous".

bruno55 wrote:

Ok, but surely, because Bosch

Because you have to "improve" it.
I can see from the photo that two coils are already to be replaced - one replaced and the other? Immediately again, apart from E19, E1 will flash.
Let's boycott everyone - Electrolux, Whirlpool.

Down Peter 2608 .
I have always had respect for you, but you will admit yourself: where are those Bosch washing machines: WFL 1200, WFL 1600, where are those dishwashers that had removable floors and everything was available, now? Of course, everything for scrap, but who suffers from it? The so-called mother nature. I predict - we will wash by the river and wash in the tub.

I know that it is a transistor, but why it is so mysterious, what is the problem to diagnose it, if anyone has any interest in it, and why the PCB does not even have its number on it. They play us and you give in!

bruno55 wrote:

I have always had respect for you, but you will admit yourself: where are these Bosch washing machines: WFL 1200, WFL 1600

The stick has two ends:
- first, the fault of our service technicians - it does not pay off to repair it, the module and the equipment have been scrapped for sure
- customers who are chasing news and gadgets i
- "rats" fight for a customer, low price, Chinese design, but the most important thing is that a cake is displayed on a color display in the oven

I did the 2000 versus 2019 analysis.
In 2000 - the washing machine cost about PLN 1,500 with min. remuneration about PLN 650.
Today, for a minimum wage, you can buy: TV, washing machine and you will stay on a vacuum cleaner.
Therefore, among others today nothing pays off to repair.

When something is produced, it must also be "annihilated", or without side effects? We cut the branch we're sitting on, but as the saying goes: there are circles that say, that their wardrobe plays ...

bruno55 wrote:

But as the saying goes: there are circles that say THAT IM THE WARDROBE IS GAME "

Someday someone will wake up with a hand in the potty, but then it will be too late. As part of the curiosity, the "W" hour struck on July 23 this year. This is the day we exceeded the consumption of the earth's resources - we recovered more from the earth than the earth could regenerate.

E19 at Bosch is the fault of the customer, incl. turns off the water, goes on vacation, comes home, turns on the dishwasher, forgets to turn on the water and after 3 minutes BOOM. The coils in Bosch are cooled with water.

Current equipment has no "power" reserve. It is so perfectly made that only the strict observance of the operating instructions can be prevented from a serious failure.

I will add something else from myself, I have been running a home appliance service for over 20 years. I was able to repair a lot of washing machines, dishwashers, ovens and refrigerators with electronic modules.

However, recently, I have been thinking about changing the industry, but people keep calling me (also regular customers) and I tell them that home appliances service technicians are a dying species.

It was wrong (on the left is now on the right in the photo), but what can we do ...

Again, I mean to check the marking on the LKW66 transistor, what is it?

Welcome back.
Good news, dishwasher repaired. Thanks a lot to Kraniec_Internetów . This transistor is actually PMBTA45, although I didn't get one, I put in MPSA44, not SMD, a bit more powerful and everything goes wrong. I will add, maybe it will be useful to someone, the LK symbol means NPN transistor, and LL PNP, the letter W means that it was made in China, I do not know what the numbers mean, but probably the voltage and current values. The one I am looking for, ie LKW66, is for a voltage of 500V / 150mA. I put it on 500V / 300mA.

Besides, I would like to add that the coil of the water jacket solenoid valve is very weak. It says that it can work 5 minutes and 20 minutes should be turned off. However, this is stated on the coil and must be read with a magnifying glass. I noticed that after 2-3 minutes the coil heats up a lot and as he wrote Peter 2608 if there is a problem with water, the coil will damage and the module also flies, error E19, then E01. How could you use such a coil, wouldn't it be easier to put a normal one on 235V, but Bosch has to introduce some innovation that it bangs your feet. "What a great idea."

Reviewing the post again, I would like to thank my colleague TONI_2003 which also guided me well in the search for this transistor.

Hello
Please help me determine what a transistor it is as it is probably not a triac. Controls the operation of the jacket water solenoid valve. It says LKW 1L, but what kind of exchange can I put here?

I wanted to add that I put a solenoid valve by mistake on alternating current having no idea that the original that had the interruption was on DC. This made the dishwasher work for several days, after which the transistors described above by my colleagues exploded. Please pay attention to this.

For border811 and wojtus61
Read the posts / topic /

wojtus61 wrote:

it worked for several days, after which the transistors described above by my colleagues exploded. Please pay attention to this.

Because this solenoid valve is at 320V DC and has a different resistance than any other.

But I already mentioned it in the first post

I had the same thing, but I came across it too late, and replacing the solenoid valve coil from the washing machine caused damage to the transistor after a few days LLW and permanent error E19 . Replacing the transistor and valve solved the problem.