Author Topic: What's this please? (Component Advice)  (Read 969746 times)

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Online Cubdriver

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Re: What's this please? (Component Advice)
« Reply #1750 on: February 19, 2022, 03:26:15 pm »
RCA house coded part, done so you went to the original manufacturer for replacement parts. But being made in 1974, not going to be a very beefy transistor, or anything special. Probably easy to replace with almost any NPN power device, like a TIP31C, which likely has plenty of SOA margin, seeing likely 5V supply has 15V input and no more than 1A load maximum, limited more by the heatsinking than anything else.

That explains why all my searches came up blank.  Thanks for the help, Sean.  It’s more likely to be an issue with the circuitry driving the pass transistor, but thought it would be nice to know its specs, too.  Back to the fun of figuring out what's what on the hand laid out board…

-Pat
If it jams, force it.  If it breaks, you needed a new one anyway...
 

Online jogri

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Re: What's this please? (Component Advice)
« Reply #1751 on: March 01, 2022, 08:59:50 pm »
I need help identifying/replacing some relays: My HP LCR meter seems to have a fault in the H cur section, looks like at least one relay in the signal path has failed. The relays are Matsushita NR-HD-12 and they have some weird 7 pin configuration, i haven't been able to find replacement relays with that pin configuration.

Yes, i know that you can find them "new" on ebay, just tried that and got desoldered and broken relays and i'm not in the mood of playing relay roulette again anytime soon so i'm looking for new relays from component distributors.

Can someone point me in the right direction?
 

Online tautech

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Re: What's this please? (Component Advice)
« Reply #1752 on: March 01, 2022, 09:43:51 pm »
Well you have a sample with the pinout and pin measurements so now you only need measure the coil resistance and go shopping for 12V relays that match.
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Can help with advice on Siglent equipment when time allows.
 

Online jogri

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Re: What's this please? (Component Advice)
« Reply #1753 on: March 01, 2022, 10:27:50 pm »
Well you have a sample with the pinout and pin measurements so now you only need measure the coil resistance and go shopping for 12V relays that match.

That's not the problem, you can find the datasheet for this relay on the internet. My problem is that i don't know what form factor it has since pretty much every relay that i could find either has six or eight pins, but not seven pins where one of the pins is between the two rows of pins.
 

Offline gamalot

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Re: What's this please? (Component Advice)
« Reply #1754 on: March 02, 2022, 06:17:06 am »
Well you have a sample with the pinout and pin measurements so now you only need measure the coil resistance and go shopping for 12V relays that match.

That's not the problem, you can find the datasheet for this relay on the internet. My problem is that i don't know what form factor it has since pretty much every relay that i could find either has six or eight pins, but not seven pins where one of the pins is between the two rows of pins.

I haven't seen this pinout either, but it's definitely a "form C" relay (SPDT, break before make). I found this seller in Australia claiming it's "brand new".

https://www.ebay.com.au/itm/283835807688

Online nali

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Re: What's this please? (Component Advice)
« Reply #1755 on: April 27, 2022, 08:42:17 am »
I'm struggling to ID this SOT23-6 part. It's marked "R30wV", and it's a buck converter.

(I did find a Toyo part with the similar marking but that was a LDO)

Also, these are the sites I have bookmarked for lookups... can anyone suggest any others?
www.smdmark.com
www.marsport.org.uk
www.s-manuals.com
connectorbook.com

Thanks
 

Offline gamalot

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Re: What's this please? (Component Advice)
« Reply #1756 on: April 27, 2022, 09:32:55 am »
I'm struggling to ID this SOT23-6 part. It's marked "R30wV", and it's a buck converter.

(I did find a Toyo part with the similar marking but that was a LDO)

Also, these are the sites I have bookmarked for lookups... can anyone suggest any others?
www.smdmark.com
www.marsport.org.uk
www.s-manuals.com
connectorbook.com

Thanks

AP65111A

https://au.mouser.com/datasheet/2/115/DIOD_S_A0013030248_1-2543852.pdf

« Last Edit: April 27, 2022, 09:35:30 am by gamalot »
 
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Online nali

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Re: What's this please? (Component Advice)
« Reply #1757 on: April 27, 2022, 09:56:03 am »
 

Offline gamalot

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Offline VinzC

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Re: What's this please? (Component Advice)
« Reply #1759 on: May 10, 2022, 11:01:14 am »
Hi fellas :-) .

I'd like to identify an SMD part, actually an SOT363 (or SOT23-6, if my searches haven't mistaken me). The part is marked GHU (I swear that's how it looks like when I put it under magnifying glasses :D ) and it's from a Samsung phone charger (not mine actually) that was lent me for repairing the USB connector. The chip case is exactly 3mm x 1.5mm (length x width), which is slightly different from the standard values I came across but I guess that's not too much important.

Here's the picture, attached. The part is illustrated on the PCB.

Tech data: the output is advertised 5V DC @ 700mA. The charger model number is ETA0U10EBE. (Made in China, of course!)
« Last Edit: May 10, 2022, 11:09:22 am by VinzC »
 

Offline grumpydoc

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Re: What's this please? (Component Advice)
« Reply #1760 on: May 10, 2022, 12:05:24 pm »
No idea but it looks like GNU rather than GHU and maybe an Advanced Analogue Circuits logo

https://www.ecadata.de/ddv/myfindherst.php?CHERST=Aac&F_SPRACHE=2

[attachimg=1]
 
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Offline VinzC

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Re: What's this please? (Component Advice)
« Reply #1761 on: May 10, 2022, 12:32:57 pm »
[...] it looks like GNU rather than GHU [...]
Hmmm... I don't think so. It's really GHU. Picture taken under magnifying glass and another angle. Although it's blurry, I can tell that's how it appears with a steady hand :D .
Good spot for the company logo though  :-+
 

Offline gamalot

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Re: What's this please? (Component Advice)
« Reply #1762 on: May 10, 2022, 01:58:42 pm »
[...] it looks like GNU rather than GHU [...]
Hmmm... I don't think so. It's really GHU. Picture taken under magnifying glass and another angle. Although it's blurry, I can tell that's how it appears with a steady hand :D .
Good spot for the company logo though  :-+

The logo and the marking pattern indicate that it is from BCD Semiconductor (now Diodes), which looks like AP3105, but only GHN/GHO/GHP/GHQ in the datasheet, no GHU  :-//
 
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Offline VinzC

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Re: What's this please? (Component Advice)
« Reply #1763 on: May 10, 2022, 02:25:05 pm »
The logo and the marking pattern indicate that it is from BCD Semiconductor (now Diodes), which looks like AP3105, but only GHN/GHO/GHP/GHQ in the datasheet, no GHU  :-//
Yup, that's the main reason I posted here :-//. I did find "GHU" references over there (https://smd.yooneed.one/code4748.html) but no GNU.

But anyway thanks for finding the relevant part  :-+ AP3105 makes sense, by the looks of it.
 

Offline grumpydoc

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Re: What's this please? (Component Advice)
« Reply #1764 on: May 10, 2022, 03:50:48 pm »
[...] it looks like GNU rather than GHU [...]
OK, yes, definitely GHU in the 2nd photo.

I see you tracked down the part now though  :-+
 

Offline timelessbeing

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Re: What's this please? (Component Advice)
« Reply #1765 on: June 26, 2022, 05:02:06 am »
I'm having trouble find any kind of specs or data for this chip.

It's in a bluetooth audio adapter.

Chips reads: NNOD151T UHQ696

Also what company is 'AB'?

TIA
 

Offline gamalot

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Re: What's this please? (Component Advice)
« Reply #1766 on: June 26, 2022, 06:39:53 am »
I'm having trouble find any kind of specs or data for this chip.

It's in a bluetooth audio adapter.

Chips reads: NNOD151T UHQ696

Also what company is 'AB'?

TIA

It comes from Bluetrum (中科蓝汛), a Chinese manufacturer with Bluetooth SOC as their main product, and they don't have any technical information on their website.

http://www.bluetrum.com/

Looks like AB137A:

http://www.bluetrum.com/product/ab137a.html

« Last Edit: June 26, 2022, 06:48:07 am by gamalot »
 
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Offline timelessbeing

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Re: What's this please? (Component Advice)
« Reply #1767 on: June 26, 2022, 05:25:50 pm »
I don't think that's it.
If you translate the page, the specs for the AB137A says
" Built-in charging: not support ", and
" Bluetooth protocol: none "
This chip does charge the lithium pouch cell from USB.
 

Offline tsmith35

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Re: What's this please? (Component Advice)
« Reply #1768 on: June 26, 2022, 07:23:30 pm »
 

Offline gamalot

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Re: What's this please? (Component Advice)
« Reply #1769 on: June 26, 2022, 07:27:54 pm »
I don't think that's it.
If you translate the page, the specs for the AB137A says
" Built-in charging: not support ", and
" Bluetooth protocol: none "
This chip does charge the lithium pouch cell from USB.

Yes you are right, I didn't scroll down that page.  |O

They have other chips that in SOP16 package, support Bluetooth audio, and build-in charging. like this one:

http://www.bluetrum.com/product/ab5607e.html

Offline tsmith35

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Re: What's this please? (Component Advice)
« Reply #1770 on: June 27, 2022, 04:23:02 am »
Also... stereo or mono?
 

Offline fkfaraz

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Re: What's this please? (Component Advice)
« Reply #1771 on: July 08, 2022, 08:01:54 am »
Hello I Hope you all will be fine.
S i have an EEPROM for which i cant find the right datasheet. i do know that it is microchip eeprom and is atleast 7 or 8 years old.(Plz See Pic). The Marking is ATMLH150

Main problem is i want to read the chip but until i know the right name for it i cannot be shure that i am reading the right chip or not..
So please help..
 

Offline mariush

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Re: What's this please? (Component Advice)
« Reply #1772 on: July 08, 2022, 08:46:34 am »
Well, it's an eeprom chip.  It was made by Atmel which is now part of Microchip

The ## part tells the truncation code (a sort of unique ID)

Example from AT24MAC402 (2 kbit eprom with i2c) datasheet

ATMLHYWW
## M @
AAAAAAAA

AT24MAC402 Truncation Code ##: P4
AT24MAC602 Truncation Code ##: P6

Date Codes
Y = Year 
2: 2012 6: 2016
3: 2013 7: 2017
4: 2014 8: 2018
5: 2015 9: 2019

M = Month
A: January
B: February
...
L: December

WW = Work Week of Assembly
01: Week 1
02: Week 2
..
52: Week 52

##  truncated part code

M: 1.7V min

@ : country where it's made

AAAA  =

and so on .....


So yours is ATMLH , maybe from 2011, week 50

2F or 2FB would be the truncation code

later edit:

In this post here : https://www.eevblog.com/forum/programming/atmlu-eeproms-marked-atmlu-identification/

There's 2FB listed as AT24C512B (512K as 65,536 x 8) : http://ww1.microchip.com/downloads/en/devicedoc/doc5297.pdf

It's obsolete, replaced by AT24C512C

 
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Offline fkfaraz

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Re: What's this please? (Component Advice)
« Reply #1773 on: July 08, 2022, 10:47:09 am »
Thank You @Mariush for the great response. Honestly i did not thought someone will reply here. so thanks for that

the complete no is
ATMLH150
2FB 2
@1H0064a

A local shop is quoting 24c02 for its replacement. is it right part for this???
 

Offline mariush

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Re: What's this please? (Component Advice)
« Reply #1774 on: July 08, 2022, 04:21:43 pm »
Well, it would probably be pin compatible, but the amount of bytes of eeprom memory would be different. 

If the original has 512 Kbit of data ( AT24C512B, 65536 x 8 bits )  you could replace with a 24C02 with only 2 Kbit of memory but if something tries to read or write data from above that 2 Kbit threshold, everything's gonna go bad, because there's no memory there.

Ideally you would get a programmer to read the chip contents and see how much data actually is stored in the chip, then get an eeprom with suitable size and same pinout.
 
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