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Search: Posts Made By: diif
Forum: General Electronics Technical Discussion 12-05-2019, 03:31 PM
Replies: 5
Views: 60
Posted By diif
Re: Component identification

This listing suggests it's a G524B1 https://www.ebay.com/itm/10pcs-G524B1-54B1M-54B1Y-524B1S-54B1C-54B1G-54B1P-54BI-54B1-G524B1T11U-SOT23-5-/401903391376
Forum: Troubleshooting TVs and Video Sources 12-03-2019, 04:54 PM
Replies: 13
Views: 152
Posted By diif
Re: Samsung LN46D550 power board issue

Check DP802 for a short.
Forum: Troubleshooting TVs and Video Sources 12-01-2019, 04:40 PM
Replies: 44
Views: 353
Posted By diif
Re: Sony KDL-46ex520

I believe this is your service manual.
Forum: Troubleshooting TVs and Video Sources 11-29-2019, 06:44 AM
Replies: 17
Views: 184
Posted By diif
Re: Samsung 46 model:UE46C675US

I'm not suggesting heat gun at this stage, it's got more than enough heat to do permanent damage. A hair dryer on high heat held close should have enough heat to cause a little bit of expansion but...
Forum: Troubleshooting TVs and Video Sources 11-29-2019, 06:21 AM
Replies: 17
Views: 184
Posted By diif
Re: Samsung 46 model:UE46C675US

The bigger of the two squares on the mainboard. Under the heatsink is the main processor. Around it are 6 black rectangles, these are the RAM.

It could be either the processor or piece of RAM...
Forum: Troubleshooting TVs and Video Sources 11-29-2019, 04:00 AM
Replies: 17
Views: 184
Posted By diif
Re: Samsung 46 model:UE46C675US

Yes, looks like a BGA (solder balls) problem under the main processor or a ram issue.
Forum: Troubleshooting TVs and Video Sources 11-26-2019, 06:51 PM
Replies: 10
Views: 104
Posted By diif
Re: JMB JT014001/01 main board problems

The heatsink on the Veatel's is either non existent or it's a flexible strip a solid heatsink is more than sufficien. I'm speaking from first hand experience.
No need to patent, there's nothing...
Forum: Troubleshooting TVs and Video Sources 11-26-2019, 05:52 PM
Replies: 10
Views: 104
Posted By diif
Re: JMB JT014001/01 main board problems

Having done several reflows I've yet to have one come back. If it's lasted x years, there's no reason it shouldn't last another x years until it fails again. It will benefit from an aluminium or...
Forum: Troubleshooting TVs and Video Sources 11-26-2019, 07:18 AM
Replies: 47
Views: 314
Posted By diif
Re: LG 50LF561V LEDs

LGs lenses are like bloody lemmings, look at them the wrong way and off the pop.
It degrades over time with the heat, loosing it's grip on the little feet.
Forum: Troubleshooting TVs and Video Sources 11-26-2019, 06:32 AM
Replies: 47
Views: 314
Posted By diif
Re: LG 50LF561V LEDs

I'd want to ensure I could align the lenses correctly before replacing all 45 LEDs, they are a pain, with bright spots on the LCD if they aren't.
Forum: Troubleshooting TVs and Video Sources 11-25-2019, 05:53 PM
Replies: 47
Views: 314
Posted By diif
Re: LG 50LF561V LEDs

The ones I use are of a similar brightness but the colour is slightly off.

Having looked at old ones under the microscope, they are cracked and discoloured and moments away from death.
Forum: Troubleshooting TVs and Video Sources 11-25-2019, 05:09 PM
Replies: 47
Views: 314
Posted By diif
Re: LG 50LF561V LEDs

There answer was on the power supply.
There are obviously 27 LEDs on the first string and 18 on the second.
A little over 6v.
Forum: Troubleshooting TVs and Video Sources 11-25-2019, 10:06 AM
Replies: 30
Views: 540
Posted By diif
Re: "Smart" TVs

https://www.statista.com/statistics/668519/lcd-tv-shipments-worldwide-by-vendor/
Forum: Troubleshooting TVs and Video Sources 11-25-2019, 06:35 AM
Replies: 30
Views: 540
Posted By diif
Re: "Smart" TVs

Samsung sell about four times as many TVs as Sony, there's bound to be more failures.
Forum: Troubleshooting TVs and Video Sources 11-22-2019, 11:34 AM
Replies: 29
Views: 486
Posted By diif
Re: Panasonic TX-48CX400B - No Video

Looking at the schematic, Q212 is the 5V standby regulation.
Forum: Equipment Usage, Soldering, Techniques, and Reviews 11-22-2019, 06:18 AM
Replies: 13
Views: 255
Posted By diif
Re: Solder fume extractor - recommendations?

I'm in the process of making one. I have a 3" inline fan and some large loc line with a flange on the end. https://www.amazon.co.uk/Loc-Line-80813-Shop-Vacuum-Orange/dp/B01LYEMPY1

I need to make...
Forum: Equipment Usage, Soldering, Techniques, and Reviews 11-21-2019, 03:53 AM
Replies: 15
Views: 452
Posted By diif
Re: Looking for a new hot air station, any recommendations?

I was going to buy an 861DW from here. https://eleshop.eu/quick-861dw-hot-air-station.html
The main reason apart from it not being a random Chinese seller and having to pay import duty/tax is the...
Forum: Troubleshooting TVs and Video Sources 11-21-2019, 12:52 AM
Replies: 35
Views: 362
Posted By diif
Re: LG 42" 42LD550 start up.

Yes, a few adhesives can be used, I wouldn't worry about it for now, there is a possibility the processor is already dead.
Forum: Troubleshooting TVs and Video Sources 11-20-2019, 05:34 PM
Replies: 35
Views: 362
Posted By diif
Re: LG 42" 42LD550 start up.

Yes, take it off.
Forum: Troubleshooting TVs and Video Sources 11-20-2019, 05:15 PM
Replies: 35
Views: 362
Posted By diif
Re: LG 42" 42LD550 start up.

The main processor, under the big heatsink in the middle.
Forum: Troubleshooting TVs and Video Sources 11-20-2019, 07:56 AM
Replies: 21
Views: 189
Posted By diif
Re: LOGIK L32HED13 LED TV Intermittent wont turn on

Why guess when meters are so cheap. Those that fix have a way to measure ESR, those that don't either don't fix or don't know about them.
Forum: Troubleshooting TVs and Video Sources 11-20-2019, 06:00 AM
Replies: 21
Views: 189
Posted By diif
Re: LOGIK L32HED13 LED TV Intermittent wont turn on

There are plenty of posts on here about them. Anyone half serious about fixing has some way of measuring ESR. That's ignoring all of the other features of them and the fact if you buy a kit version...
Forum: Troubleshooting TVs and Video Sources 11-20-2019, 05:47 AM
Replies: 18
Views: 296
Posted By diif
Re: LG 55LA6200 Back light strips

I didn't really think you'd have left bits on but I've seen more obvious things overlooked in the past so had to ask.

I use 5 second fix....
Forum: Troubleshooting TVs and Video Sources 11-19-2019, 04:50 PM
Replies: 21
Views: 189
Posted By diif
Re: LOGIK L32HED13 LED TV Intermittent wont turn on

C25 is for the missing capacitor above, that's D9 and a diode. What is the value of the small green capacitor in photo 3 at the bottom of the PCB under the word HOT. ?



It does look a little...
Forum: Equipment Usage, Soldering, Techniques, and Reviews 11-19-2019, 04:36 PM
Replies: 27
Views: 418
Posted By diif
Re: Advice for a new BGA rework station owner please

There was/is a user from here that use to reball using a toaster oven element for the bottom heater and hot air for the top.
He upgraded to a 3 zone machine similar to yours but with out the auto...
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