Need help identifying smd components - Page 1
Forum section: electronics / beginners

author: ArcadeTV
author_rank: Contributor
timestamp: December 01, 2014, 08:45:33 pm
content: Hi guys,I've been doing these pcb-strips from videogame consoles for quite a while now, you may download my scans at full 600dpi resolution from my dropbox here:https://www.dropbox.com/sh/w8fv38h2xrett7x/AABkX7Z1ZcIsq6W8taO3I_Qma?lst=Right now I'm creating a full schematic of the first-revision Game Boy Advance and I need help identifying some components please.After the schematic is finished I want to move the cpu, sram and cartslot to an fpga-dev-board so my focus is not only to identify but also find available components for these.Here's the first candidate that gives me a headache:Microchip-branded M 144 (someone else mentioned an M 121 on his pcb)It's a power-controller that has to be related to voltage switching between 5V and 3.3V on the GBA.And the same IC from another pcb:Next is an SMD-transformer:Found another one on another board labelled 247 and 70.These are all transistors, diodes and other SOT-ICs that I can't find:Would be just great if somebody could point me to some info,thanks!

author: 128er
author_rank: Regular Contributor
timestamp: December 01, 2014, 08:58:33 pm
content: Hi ArcadeTV,welcome to the Forum. One question: How do you remove the silkscreen and the soldermask from the pcb's? Mechanically with fine sandpaper, or with some sort of chemicals? Looks rather clean!

author: ArcadeTV
author_rank: Contributor
timestamp: December 01, 2014, 09:04:57 pm
content: It takes like forever but I do it all manually. Desoldering, cleaning and then sanding with a delta-grinder and 240+ grain sandpaper. I measured all caps and resistors on the gba in the process and it was a 12 hrs job!

author: ivaylo
author_rank: Frequent Contributor
timestamp: December 02, 2014, 09:41:53 am
content: http://www.smdcode.com/en/There was also a Russian hosted one which was pretty good but am not finding it immediately

author: ArcadeTV
author_rank: Contributor
timestamp: December 02, 2014, 10:24:12 am
content: How could I not find that site in the first placeThanks!

author: tautech
author_rank: Super Contributor
timestamp: December 02, 2014, 10:43:55 am
content: Quote from: ArcadeTV on December 01, 2014, 08:45:33 pmWhen trying to identify coded SMD componetry IMO use Google but you must include the package id.Accurate identification of the package is crucial to the correct result.Easy example:Q9 in second image from bottom of your post.Google: z r sot-23Without opening the hits you can see several that identify it as a 2PD601ARBecause there are several, you can be confident you may have found the right answer.But this is not always the case, you must follow ANY lead in a Google search. Often these days with so many devices used only in Asian products and they are not commonly used elsewhere. Then results that point to Aliexpress are often your friend.Sometimes this is the only way I have found SMD identification.BUT when you think you have the answer you MUST get the datasheet and CONFIRM with the datasheet the MARKING CODE.If it all matches you have won.Post edited

author: hamdi.tn
author_rank: Frequent Contributor
timestamp: December 02, 2014, 10:48:10 am
content: i often use this page to identify SMD parthttp://www.s-manuals.com/smd

author: ArcadeTV
author_rank: Contributor
timestamp: December 02, 2014, 10:51:42 am
content: Thanks!It's hard to read but it's 'Z R' and not 'Z8', also Q is indicating a transistor instead of a diode.

author: ArcadeTV
author_rank: Contributor
timestamp: December 02, 2014, 06:48:24 pm
content: I think I've found some of my missing components.The IC from Microchip "514X" makes me crazy... There's a TC510 - TC514 but the 514 has far too many pinsI also made a table and got some more gba-mainboards to find alternative smd-codes on the equivalent components...

author: lgbeno
author_rank: Frequent Contributor
timestamp: December 02, 2014, 07:01:31 pm
content: Make sure that you are not on a false path with microchip, I've seen a macronix logo that was very similar. I honestly can't tell one way or another

author: lgbeno
author_rank: Frequent Contributor
timestamp: December 02, 2014, 07:03:40 pm
content: http://www.eetimes.com/document.asp?doc_id=1128718

author: ArcadeTV
author_rank: Contributor
timestamp: December 02, 2014, 07:09:00 pm
content: How very interesting!Thanks for that!!

author: PA0PBZ
author_rank: Super Contributor
timestamp: December 02, 2014, 07:44:32 pm
content: While searching for U4 I found this:http://ftp3.ie.freebsd.org/pub/download.sourceforge.net/pub/sourceforge/n/ni/nintendo/gbatek-ndsl-spec.pdfUnfortunately all that is in there about U4 is:QuoteBut It's 300+ pages of GBA information

author: ArcadeTV
author_rank: Contributor
timestamp: December 02, 2014, 08:19:39 pm
content: of course i did know that sitebut thanks for looking!!datasheet would be great to see footprints, find alternatives and see circuit notes.I'll be rebuilding the gba from scratch and transplant the cpu to a new pcb to get it working with an fpga and 240p TV-out. that's why i'm looking for the datasheets.