I'm looking for a new soldering station/iron for home, that's not too costy. I have a Hakko FM-202/FM-2027 at work, and I love it, but the price point is way too high for home/occasional use.
I have heard there were cheaper non-Hakko soldering stations/irons that could use FM-2027 tips, like this one [url]http://www.ebay.ca/itm/Hakko-T15-JS02-Tip-Bent-R0-2-30-deg-x-1-6-x-7-9mm-for-FM-2021-FM-2027-FM-203-FM-/281700128365[/url] (love those tips).
Thanks!https://I'm looking for a new solder...7 at work, and
Five_magics
Member
Last Activity: 02-27-2018, 11:10 AM
Joined: 04-11-2016
Location: Quebec
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Looking for new soldering station/iron
Last edited by Five_magics; 06-10-2016, 10:47 PM. -
Re: Samsung LN46D630M3F, TV powers on, sound works but no backlight
Ordered everything (the caps, the resistors and the IC). Will report back whenever I receive everything. -
Re: Samsung LN46D630M3F, TV powers on, sound works but no backlight
As a single resistor, there are 38,3k 1% available. If I use resistors in parallel I can go with 56,2k with a 118k for a total of 38 068 ohm....Leave a comment:
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Re: Samsung LN46D630M3F, TV powers on, sound works but no backlight
Took out the resistors to test them out. One is at 38,8kohm, the other at 2Mohm (they're in parallel). In theory this should give me 38,061 ohm.
But there's no 38,8kohm resistors available over at digikey or mouser. Thought I'd get different values to end up as close to 38,061 as possible. For example, a 44,2k in parallel with a 274k should give 38,060 ohms.
I'm thinking that would be just fine, but I'm wondering how much of a difference is acceptable.Leave a comment:
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Re: Samsung LN46D630M3F, TV powers on, sound works but no backlight
Thanks for the info on the INV and OVP pins. INV works like I thought, but wasn't too sure about the OVP pin.
The cap on the OVP pin was a ceramic cap, like these; [url]http://2.imimg.com/data2/JF/EC/MY-899663/smd-capacitor-250x250.jpg[/url]
The one on the INV pin was grey/white-ish. That's the one I lost, so can't measure it. Can only say it wasn't shorted.
I will be ordering both caps, and both resistors(2x in parallel) for the INV pin, aswell as the...Leave a comment:
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Re: Samsung LN46D630M3F, TV powers on, sound works but no backlight
Voltage fluctuation was before taking out the caps. After taking them out and leaving them out, the voltage is stable at 390 volts. TV been working for 2 hours now.
Haven't measured the grounded resistors on the INV and OVP pins yet, will do that tomorrow. Will most likely replace them anyways, aswell as the bypass caps and IC (have to order online and pay shipping anyways). I'm still thinking the heat from the soldering iron might be "fixing" the resistors/IC temporarly. Either...Last edited by Five_magics; 06-08-2016, 10:01 PM.Leave a comment:
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Re: Samsung LN46D630M3F, TV powers on, sound works but no backlight
Got to test the TV some more tonight, here's what happens. At first, the backlight works, but the PFC output fluctuates (390vdc > 410vdc > 400vdc > 410vdc, etc). After 5-10 minutes, the output reaches 450vdc, at which point the backlight/PFC shuts off. Shorting the BL_on signal at that point is useless, and the PFC won't turn back on.
With the PFC off, the Gate ouput of the IC is at 0vdc (6vdc when working), so I figured there must be something wrong with the voltage dividers (or IC). Decided...Last edited by Five_magics; 06-08-2016, 09:07 PM.Leave a comment:
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Re: Samsung LN46D630M3F, TV powers on, sound works but no backlight
Right now, the TV works for a few minutes, before the backlight shuts off.
When it works, PFC voltage varies between 390 and 410v.
Also, the inverter transformers now make a buzzing sound that wasn't there before, if that's any indication.Last edited by Five_magics; 06-07-2016, 08:42 PM.Leave a comment:
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Re: Samsung LN46D630M3F, TV powers on, sound works but no backlight
Removed the new resistors, tested them out of circuit(they're good), resoldered and the TV works.
A solder joint looked shady, probably my mistake. Will test and report back.Leave a comment:
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Re: Samsung LN46D630M3F, TV powers on, sound works but no backlight
Will do tomorrow. I'll check if there's any change going on at all when shorting the BL_on signal.Leave a comment:
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Re: Samsung LN46D630M3F, TV powers on, sound works but no backlight
They are. 5x 1,2Mohm and 4x 6,8Mohm. By the picture from your post #22, that's exactly what's on the board (it's also what was on my board originally). Didn't measure the new ones before soldering them on board tho.
Also, when the TV crapped again I took for granted the resistors failed so didn't bother confirming it was the same trouble as before(now that I think of it I probably should have).
D810 is good.Last edited by Five_magics; 06-02-2016, 10:37 PM.Leave a comment:
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Re: Samsung LN46D630M3F, TV powers on, sound works but no backlight
Judging from the 7930B datasheets, operating supply voltage should be 13-20v, so at 16v I should expect it to work properly. Could ICP801 be fried?Leave a comment:
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Re: Samsung LN46D630M3F, TV powers on, sound works but no backlight
Wow ok my mistake, measure with the cold ground as reference, hope I didn't screw anything up. VCC is at 16vdc (was at 12,9v before).Last edited by Five_magics; 06-02-2016, 07:43 PM.Leave a comment:
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Re: Samsung LN46D630M3F, TV powers on, sound works but no backlight
PS_on coming from main board is present, but ICP801 has no Vcc.Leave a comment:
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Re: Samsung LN46D630M3F, TV powers on, sound works but no backlight
Shorthing the BL_on signal, I'm only getting 160 vdc on the main caps.
EDIT: BL_on is at 5v.Leave a comment:
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Re: Samsung LN46D630M3F, TV powers on, sound works but no backlight
Okay received the resistors, swapped them and it's still not working.Leave a comment:
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Re: Samsung LN46D630M3F, TV powers on, sound works but no backlight
They're surface-mounted.Leave a comment:
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Re: Samsung LN46D630M3F, TV powers on, sound works but no backlight
Looks like the resistors are 1206 package(0,125in x 0,060in). They're 1,2M and 6,8M. Seems out of luck with Digikey, where else should I look?
EDIT: Found some at Mouser. Will 1/4 watts do? Sounds a bit low to me.Last edited by Five_magics; 05-24-2016, 08:10 PM.Leave a comment:
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Re: Samsung LN46D630M3F, TV powers on, sound works but no backlight
Until I get the resistors, is there anything else in the PFC I should check out for?Leave a comment:
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Re: Samsung LN46D630M3F, TV powers on, sound works but no backlight
Two weeks later, problem came back. Gonna order the resistors and swap them. Anyone can help identifying the P/N or ratings? Gonna order from Digikey.Leave a comment:
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