What are some good ways to reverse check silk screen printing? Welcome to chat and share your experience

okhxyyo

What are some good ways to reverse check silk screen printing? Welcome to chat and share your experience [Copy link]

 

In the past two days, several netizens have asked about silk screen reverse checking, and Guan Guan has also tried to understand and check it. It is not a complicated matter, but it is a headache if you can't find it.

I just searched on Baidu and found several websites for silk screen reverse checking.

I tried several times, and some websites couldn't find a silk screen at all. I felt that there was too little content and many of them could not be found;

Some websites charge a fee, 10 yuan for each check, -_-||, this is a huge money swallowing;

I did find it on some websites, but they only told me that it was a certain type of chip, without telling me the specific model. They just asked me if I wanted to buy it or not. I asked them for information, but they didn't give me anything. Sigh~

I also learned a new trick from netizen @天天1, which is to search for silk screen printing on Taobao. However, this still requires luck and is still difficult to find.

There are also books on silk screen reverse checking, but these books are not complete, and there are always new chips coming out, so searching is not that convenient. But I still found some from our download center, and you can download them if you need them:

Commonly used voltage chip abbreviations reverse lookup

Code silk screen mark reverse check manual copy board, maintenance essential tool book

SMD diode and transistor code silk screen query manual

What do you usually do when you want to reverse check the silk screen? Come and share your experience!!!

dcexpert

There is a website that can do reverse check, but many chips cannot be found.

http://www.smdmark.com/LN

天天1

I have also used a special silk screen reverse check website, but I don't think it's very good. After comprehensive comparison, I still think it's the fastest and most convenient to search for silk screen on Taobao and 1688.

okhxyyo

Tiantian1 published on 2021-3-16 16:41 I have also used the special silk screen reverse check website, but I don’t think it’s very good. After comprehensive comparison, I still think it’s the fastest and most convenient to search for silk screen on Taobao and 1688

OK. I found a new way, 1688, haha

okhxyyo

dcexpert published on 2021-3-16 15:42 There is a website that can be used for reverse checking, but many chips cannot be found. http://www.smdmark.com/LN

Yes, I have searched this website, but I didn’t find the chip that the netizen asked about today.

shihuntaotie

For ti, you can check Linear Technology's official website directly, and for the others, you can go to Taobao or 1688, or Taobao or other purchasing websites.

qwqwqw2088

Now there are more chip manufacturers, and foreign big manufacturers don't care about these silk screen reverse checks. They are too lazy to print the company logo of domestic chips, and they don't play by the rules at all.

The silk screen reverse check website cannot get any data without big data support. It only deals with old chips from the past all day long. Some of them require a fee to check. Besides, silk screen is not a core technology, so counterfeit manufacturers and companies that imitate others will pay close attention to it.

Really practical, the use of silk screen search is the mainstream of maintenance personnel

damiaa

Good. This post is good. Let's discuss it. I failed to check it yesterday.

But because the known condition is

1. This chip boosts the 3.7~4.2V voltage from the rechargeable battery to 5V.

2. SOT23-6 package

3. Know the silk screen AA6B.

solve

1. The first step is to check the silk screen. The search on the website and Taobao failed.

2. Considering this is a boost IC, I found the LiChuang Mall. There are many chips, but not this model.

I want to praise Lichuang here. The data and schematic PCB library are directly provided. It can also be exported to protel

3. List the manufacturers listed by LiChuang and check the manufacturers’ official websites!

At first I wanted to look up Changdian Technology, but I couldn’t find the website.

Later, I checked several boost chips from different companies and found Nanlin Electronics' LN2272, which was a perfect match. I felt it was almost the same.

4. Then use LN2272 to check on Taobao. It is found that LN2272 shows AA6B in the Taobao display picture. This is further confirmed.

Can't find LN2272 using AA6B on Taobao

Chip search is hard work. Everyone works hard. Haha.

okhxyyo

damiaa posted on 2021-3-17 09:34 Not bad. This post is good. Let's discuss it more. I failed to reverse check yesterday. But because the known condition is 1, the chip is a rechargeable battery...

You have perseverance. You list them one by one. That's amazing.

眼大5子

There are people on Taobao who specialize in checking chips.

okhxyyo

Yanda5zi posted on 2021-3-17 10:17 There are people on Taobao who specialize in checking chips

Hmm??? Is there any other like this?? This should be charged

freebsder

Last year I was looking for a small Japanese NEC device, but it was 20 years old. The silk screen had almost no internal and external screens, and the printed silk screen had almost nothing to do with the device. Damn. I searched for three days before I finally found some clues in the corners.

okhxyyo

freebsder posted on 2021-3-17 18:46 Last year I found a small Japanese NEC component, but it was 20 years old. The silk screen, not only the inner and outer nets were almost gone, but the printed silk screen and components were basically...

I really admire your perseverance.

littleshrimp

damiaa posted on 2021-3-17 09:34 Not bad. This post is good. Let's discuss it more. I failed to reverse check yesterday. But because the known condition is 1, the chip is a rechargeable battery...

Your silkscreen naming method for LN2272 isn't even in the data sheet?

damiaa

littleshrimp posted on 2021-3-18 20:32 Don’t you even have the silkscreen naming method for LN2272 in the data sheet?

It is in the printed information of the manual. But the pinout of the package diagram is probably wrong. It does not match the schematic diagram.

LN2272_C.pdf (330.53 KB, downloads: 3)

2021-3-22 08:48 上传

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