Re: Emerson LF320EM4F
Sorry for the late reply. I went through the whole primary side and tested all the diodes and resistors I could. I set my meter to auto and tested all the resistors. For testing all the diodes, I set my meter to diode mode and tested the forward and reverse bias.
Resistors
R611 is 0.6. Supposed to be 0.36.
R601 is 1.052M. Supposed to be 1.2M.
R614, R603 & R604 all read low. They should be 470K, but measure ~310K.
R622 is supposed to be 0, but reads 0.4.
R623 is 0.4 and supposed to be 10K.
R608...
JamisonM
Member
Last Activity: 11-18-2017, 02:11 PM
Joined: 06-02-2010
Location:
-
-
Emerson LF320EM4F
I have an Emerson LF320EM4F that seems totally dead. I made some measurements using the the metal tab on the corner of the board as ground. The 21v, 3.3v and 13v lines are all dead.
J145(Reset) Is 2.6v and J171(Protect3) is 0.073v. On CN1001, I get 2.2v. On the Primary side, I get 173.8v at the main filter cap. I've looked the board over for any physical damage and there are three places I've identified. On the secondary, D660 seems to have had it's face blown off.
On the primary side, Q602 also has a chunk of itself missing. Right next to it, C609 has darkened... -
Re: LED Backlight Upgrade Kit Opinions
Next go around, I'll put them to the scalpel. Should be fairly easy if I line the other side up well. I'll just have to follow the side of the PCB. I've got some some [URL="http://www.amazon.com/Scotch-Heavy-Duty-Mounting-Clear/dp/B00004Z4BU"]clear scotch mounting tape[/URL] around here somewhere. Overkill for sure, but falling off isn't something I expect it to do with that stuff. Here are some pictures you requested.
Re: LED Backlight Upgrade Kit Opinions
...Leave a comment:
-
Re: LED Backlight Upgrade Kit Opinions
Heh, too late. They arrived in just under two weeks. They aren't an XP-G, but they are still quite bright.
I tested them with a old computer PSU that I converted to a bench supply. I wasn't sure how to wire the two yellow wires, so I experimented with the 3.3 and 5v rails. Once I got the wiring right, I was quite pleased with both their brightness and color temperature.
By my eyes, they're closer to white than blue, easily. Oddly, the 3.3 works to turn them on and to what I would consider maximum brightness....Leave a comment:
-
Re: AOC 2216sw no backlight
Check out [URL="https://www.badcaps.net/forum/showthread.php?t=10419"]2 seconds to black[/URL] sticky. It's got loads of info for troubleshooting this problem.Re: AOC 2216sw no backlight
Check out [URL="https://www.badcaps.net/forum/showthread.php?t=10419"]2 seconds to black[/URL] sticky. It's got loads of info for troubleshooting this problem.Re: AOC 2216sw no backlight
Check out [URL="https://www.badcaps.net/forum/showthread.php?t=10419"]2 seconds to black[/URL] sticky. It's got loads of infoLeave a comment:
-
Re: LED Backlight Upgrade Kit Opinions
I guess I'll bite the bullet and see how these are. Maybe I'll even do a bit of a review of them.Leave a comment:
-
Re: LED Backlight Upgrade Kit Opinions
stj, one thing I forgot to ask was about the color of the LEDs. Did they lean heavily to the blue side or were they more of a neutral tint? I don't think it matter too greatly as I can adjust the colors with the monitors menu or the software installed with my video card.Leave a comment:
-
Re: LED Backlight Upgrade Kit Opinions
stj, that's one thing I like about them them. If I have to open the LCD panel, why not replace them with something that will run cooler and use less power while at the same time providing similar performance? That's what I'm hoping at least.
Thing I don't like is I can't tell what kind of LEDs they're using or how hard they're driving them. My guess is they're the same LEDs found of the various flexible strips. Basically, 3528, 5050, 3014 or 5630. If they're running as cool as you say, then it can't be too hard. While they won't...Leave a comment:
-
Re: LED Backlight Upgrade Kit Opinions
stj, do you have another monitor with ccfl to compare with? How's the brightness? Is the screen uniformly lit?Leave a comment:
-
LED Backlight Upgrade Kit Opinions
I've got an Acer B243W monitor that I believe has CCFL lamps at the end of their lives. The monitor turns on fine and stays on as well, but the backlight turns off after a few seconds. Using a flashlight, I can still see that there is a image being displayed while connected to my laptop. Using [URL="https://www.badcaps.net/forum/showthread.php?t=19987"]budm's great idea[/URL], I've gotten some old CFL bubs to stay lit while the monitor is turned on instead of turning off after a few seconds. Now, I'm at a bit of a crossroads. I could order replacement lamps from CCFL Warehouse, but 4... -
Re: Gateway 504GR
kc8adu, do you think that broken resistor pictured above is preventing this computer from turning on? If it is, what kind should I replace with it?Last edited by JamisonM; 10-06-2010, 11:25 AM.Leave a comment:
-
Gateway 504GR
I was throwing out some scrap lumber to the local recycling center the other day and looked in the scrap metal bin as I always do and saw the rear of a computer missing its power supply. I fished it out and took off the side panel and saw it was of a slightly newer design. I took it home and hooked up and got nothing. It then occurred to me why it was in the bin and why it was missing it's power supply. Anyway, the LED indicator on the motherboard, an Intel e210882 as best as I can figure, comes on ,but nothing happens. All the caps are Rubycon and Nichicon and all look to be in good condition.... -
Re: Preventive Recaping?
I just noticed I put this in the wrong forum. Can a Moderator please move this where they believe it belongs?Leave a comment:
-
Preventive Recaping?
I have an old 27" CRT television set that's probably around a decade old. It's a hand me down and has given me no problems for as long as I've had it. I'm looking to have it upgraded to a 32" LCD TV sometime this year or within the next. I keep looking around on Cregslist trying to score one at a decent price. I've seen a few, but none that are what I'm looking for. Anyway, when I do, it will most likely not come with a warranty seeing as they notoriously short. Can I replace the caps in it with some Panasonic's or Rubycon's to help prevent a future failure that can possibly take other...
No activity results to display
Leave a comment: