I think I have them. Let's see tomorrow, it is too late now to go to the workshop.
Good morning,
Here we are, originals. I believe @htsz2006 has got genuine transistors. Let me remind you, everything is "Made in China" today. These originals have been purchased from Mouser but in Invoice there is "Country of Origin: CN". There are also other producers of these transistors, including ON Semi and ISC. All of them are Made in China. Loogically one may ask: why should anyone in China use "Fakes"?
"Usual Suspects" produce them all!
Here we are, originals. I believe @htsz2006 has got genuine transistors. Let me remind you, everything is "Made in China" today. These originals have been purchased from Mouser but in Invoice there is "Country of Origin: CN". There are also other producers of these transistors, including ON Semi and ISC. All of them are Made in China. Loogically one may ask: why should anyone in China use "Fakes"?
"Usual Suspects" produce them all!
Hello!
Thanks for your input.
Strange that 3 pin connector...I would have liked the balanced input.
So how should I connect the unbalanced signal and ground wires to this connector? This is how the back of this pin looks...
I hope they are working as it should....or I am the only one who bought these board with not so good transistors -I tend to have this kind of luck...
In the description of the product it does not say Toshiba...just "power transistors are 2SC5200 and 2SA1943 (8 pairs)" -All the board I have found on Aliexpress had these transistors..., I do not care if as long as it
will work (if someone wants to copy, I guess could copy the text alignment too, I do not think this is the hardest thing to copy.) as long as it will function as it should. My original Hitachi fridge died 1 month after was out of warranty...the service does not exist...only on paper. All the ic-s on the board had holes in them...I have found a service in Hungary, the new board price was around 300Euros....so I bought I new Beko fridge for 350Euros...works well so far.
Thanks for your input.
Strange that 3 pin connector...I would have liked the balanced input.
So how should I connect the unbalanced signal and ground wires to this connector? This is how the back of this pin looks...
I hope they are working as it should....or I am the only one who bought these board with not so good transistors -I tend to have this kind of luck...
In the description of the product it does not say Toshiba...just "power transistors are 2SC5200 and 2SA1943 (8 pairs)" -All the board I have found on Aliexpress had these transistors..., I do not care if as long as it
will work (if someone wants to copy, I guess could copy the text alignment too, I do not think this is the hardest thing to copy.) as long as it will function as it should. My original Hitachi fridge died 1 month after was out of warranty...the service does not exist...only on paper. All the ic-s on the board had holes in them...I have found a service in Hungary, the new board price was around 300Euros....so I bought I new Beko fridge for 350Euros...works well so far.
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Everything is correct. There is normal China, and there is a fake. Your transistors with laser engraving and paint correspond to the drawings and markings in the datasheet. The line underlining the code is also there. The word Japan should be at the same level, and what is this marking N 470? I think CN on the packaging is the country of delivery, not manufacture. In recent years, I have read many forums about fakes, everywhere they point out the incorrect application of the font. Counterfeit ones do not correspond to the marking, even in small things. I also had normal Chinese ones (spare parts from a ship, the steamer was built in China) 1943/5200, but they corresponded to the Toshiba marking. I am only pointing out the unreliability, but measurements must be taken. I do not argue, I am just sharing a little experience.
I've seen many black boards on Aliexpress with transistors, but this is the first time I've seen them with such markings. Send me a link where you bought them.
I have compared your photo and indeed it is different from the version I have. Difference is just input.
Could you please post a photo of the whole board?
EDIT:
Below is an image I have found at aliexpress: a board with three holes for input terminal.
I found it >>HERE<<
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The link htsz2006 simply says power transistors - 2SC5200 and 2SA1943 (8 pairs). They can install any, which is what they did. They installed a fake. Complaints are not accepted. Berlusconi's link says Toshiba, that's why it's more expensive. Chinese business. 😉
The strange thing is the pin which should not be connected(according to the marking in the front) is connected to something on the back...
No I was supposed to get a no-name power transistors are 2SC5200 and 2SA1943 (8 pairs), but I got Toshiba...as you can see in the pictures...🙂
If i would have bought the more expensive one with declared Toshiba transistors and the Japan inscription would have been in the center(like mine)
what complain could I be making...🙂
I could complain that the bord on the aliexpress site has green connectors at the output, mine has green and white, so the board I have received is different from that on the site...
Anyway..I will see and hear something..the question remains where should I connect the two input wires?
Thanks for all your inputs!
If i would have bought the more expensive one with declared Toshiba transistors and the Japan inscription would have been in the center(like mine)
what complain could I be making...🙂
I could complain that the bord on the aliexpress site has green connectors at the output, mine has green and white, so the board I have received is different from that on the site...
Anyway..I will see and hear something..the question remains where should I connect the two input wires?
Thanks for all your inputs!
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К сожалению, надпись Toshiba сейчас ничего не значит. Самое простое — выпаять по одному 1943 и 5200, измерить мультиметром емкость между базой и эмиттером. Если она в пределах 6000-7000 пФ, то хотя бы будешь знать, что кристалл там большой и не сгорит в процессе работы. Дальше проверка сложнее. На плате прозвонить каждый контакт, один должен быть на массу, другой на входной резистор, а третий отпаять.
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My question is still....how to connect the input signal wires on this 3 pin connector?
Regarding the originality of the transistors...you can't know for sure...even if you buy the most expensive version..🙂
This more expensive board https://www.aliexpress.com/item/100...5320bc11622,tpp_buckets:668#nav-specification
looks like mine...so...I received the most expensive board-so I received the board with Toshiba transistors🙂and this has in the desciption
5200 finished:
Finished board with Toshiba 5200 transistors and ELNA capacitors (2240 version).
Regarding the originality of the transistors...you can't know for sure...even if you buy the most expensive version..🙂
This more expensive board https://www.aliexpress.com/item/100...5320bc11622,tpp_buckets:668#nav-specification
looks like mine...so...I received the most expensive board-so I received the board with Toshiba transistors🙂and this has in the desciption
5200 finished:
Finished board with Toshiba 5200 transistors and ELNA capacitors (2240 version).
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@htsz2006
You mix photos with soldered terminal with photos without the output terminal. Obviously, some are downloaded from internet and perhaps there are photos of your board taken by you. Also there are two different photos of their backs. This is confusing. This isn't helpful at all.
Please take a photo of YOUR board and indicate that this is the actual board you have in your hands. Then someone can help you to connect the input.
You mix photos with soldered terminal with photos without the output terminal. Obviously, some are downloaded from internet and perhaps there are photos of your board taken by you. Also there are two different photos of their backs. This is confusing. This isn't helpful at all.
Please take a photo of YOUR board and indicate that this is the actual board you have in your hands. Then someone can help you to connect the input.
Dear htsz2006, we have explained to you everything that could be said, but you do not hear us. Once again, ring (if you can) each pin of the connector. Or better yet, unsolder it and solder a shielded conductor for better quality. One contact in the connector is ground, one is an input (connected to a resistor that is nearby), and the third is not soldered to anything (bare). Here we try to buy boards without transistors, and buy them from trusted sellers and we know for sure that they are good. I am not imposing my opinion on you, but trying to protect you from fire and explosion, since there is a suspicion of a fake. How to check 1943/5200 quickly has already been written.
Hello! I hear you and appreciate all your input and thank you all again ...it is not clear to me yet how to check the transistors. I have found a video on youtube
according to which fake 5200 are slimmer, are magnetic and are lighter...so far mine are 5mm thin(as originals), are not magnetic(as originals), and I have not measured their weight yet...
The easiest thing for you is to have an inexpensive multimeter to measure the capacitor. I showed how to do it in the photo above. If the capacity is at least higher than 6000 pF, then you can at least assume that the crystal there is not small and the transistor will not burn out instantly. Chinese fakes are now very high quality. Look carefully at the markings and font in the film, every detail has a meaning.