problem with QB288 connector

M

mannitu77

Active Member
hello men,
can somebody give me advice for this connectors? i just suck at them. Theyre supposed to hold on to the wire, just put in in? I pushed and drilled different diameters in there, single or doubled wires..doesnt hold, the slightest pull and theyre out again. :(

Wanted to use 0,75 mm2DSCI2589[1].JPG
 
The recommended wire is solid core 18-22 AWG, per HLG. A right sized, properly stripped wire will slide in about 1/4" and remain. Pulling it out requires pushing down gently on the release tab.

The 288 is a great board but those molex connectors are fragile as fuck.

It looks lik you mangled the shit out of yours. Next to the molex connector is a solder pad. If you permanently fucked up your molex connector you can solder the wire permanently to the pad.

PS: Never use stranded wire, never force those connectors, always insert at the proper angle, and never force them.
 
never use standard wire? Im using AWG 19 copper cable. Its many fine copper strings, that makes it difficult to apply force. what wire should i use? I think ill just secure every connecting with a tip of transparent silikon. Probably not the only good reason. Still wondering what im doing wrong.
 
Ah I see why you are asking for help from men only, because this is an issue of proper insertion. Before we get too far into that though, it might be worth acknowledging that your + connector appears to have a broken release tab. As far as proper insertion, yes you need a solid core, not some girly braided stuff.
 
BTW those are not HLG QB 288 boards - HLG stamps both “ quantum board “ and full company name . Plus red leds run differently than your layout .

18 guage solid core are preferred with similar connections
 
Last edited:
not a single person said its HLG. Besides that, their Boards are also made in China, who knows, maybe the same factory. Theyre using more expensive 660nm solutions. I dont even know, if they ever had LM281B+ boards. Total cost of this lamp is less than 250eu.

edit: they assemble in USA, but i dont think they print the PCBs on their own.

edit2: hope im not telling BS here XD
 
Last edited:
mannitu77 said:
not a single person said its HLG. Besides that, their Boards are also made in China, who knows, maybe the same factory. Theyre using more expensive 660nm solutions. I dont even know, if they ever had LM281B+ boards. Total cost of this lamp is less than 250eu.

edit: they assemble in USA, but i dont think they print the PCBs on their own.
Click to expand...

They do , in Tennessee and Michigan . QB 288 unfortunately is a branding name used across many chinese board clones. I would suggest hardwire solder to pad.
 
mannitu77 said:
never use standard wire? Im using AWG 19 copper cable. Its many fine copper strings, that makes it difficult to apply force. what wire should i use? I think ill just secure every connecting with a tip of transparent silikon. Probably not the only good reason. Still wondering what im doing wrong.
Click to expand...

Tin the lead of your strand wire like youre supposed to. No longer a strand wire.
 
mannitu77 said:
not a single person said its HLG. Besides that, their Boards are also made in China, who knows, maybe the same factory. Theyre using more expensive 660nm solutions. I dont even know, if they ever had LM281B+ boards. Total cost of this lamp is less than 250eu.

edit: they assemble in USA, but i dont think they print the PCBs on their own.

edit2: hope im not telling BS here XD
Click to expand...
I call BS.


 
theres no data on this LM281B+ boards, is there? I mean complete board, not just the Lm281B* SE rank datasheet.

edit: yeah i was wrong with HLG but i didnt want to edit my comment or delete it, would have looked cowardish.
But HLG wasnt the first to have the idea to put some LEDS on a board instaed of a strip?
 
mannitu77 said:
theres no data on this LM281B+ boards, is there? I mean complete board, not just the Lm281B* SE rank datasheet.

edit: yeah i was wrong with HLG but i didnt want to edit my comment or delete it, would have looked cowardish.
But HLG wasnt the first to have the idea to put some LEDS on a board instaed of a strip?
Click to expand...
Well they're the ones with the Quantum Board patent.
 
mannitu77 said:
theres no data on this LM281B+ boards, is there? I mean complete board, not just the Lm281B* SE rank datasheet.

edit: yeah i was wrong with HLG but i didnt want to edit my comment or delete it, would have looked cowardish.
But HLG wasnt the first to have the idea to put some LEDS on a board instaed of a strip?
Click to expand...
Do you have any evidence that someone came up with the QB288 idea before HLG did, or is this just some speculation on your part?
 
mannitu77 said:
theres no data on this LM281B+ boards, is there? I mean complete board, not just the Lm281B* SE rank datasheet.

edit: yeah i was wrong with HLG but i didnt want to edit my comment or delete it, would have looked cowardish.
But HLG wasnt the first to have the idea to put some LEDS on a board instaed of a strip?
Click to expand...
165 lumens /watt, not counting driver loss

www.samsung.com

LM281B+ | SAMSUNG LED | Samsung LED Global Website

0.5 W, 3 V mid power LED, Luminous Flux: 73 lm @ 150 mA, Luminous Efficacy: 165 lm/W
www.samsung.com www.samsung.com
 
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