Re: Insignia NS-LTDVD26-pwr board MIP260B- tracking down shut down issue
thanks all
Wyld_Goose
Member
Last Activity: 05-02-2013, 07:36 PM
Joined: 04-09-2013
Location: FL
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Re: Insignia NS-LTDVD26-pwr board MIP260B- tracking down shut down issue
ok weirdness!
there are 13 pins but 5 things (6 if you count the second ground) to check.
stand by
+5=0.68
SB=0.68
VS=5.32
+5=0.68
+12=0
Unit on
+5=5.29
SB=3.13
VS=5.32
+5=5.32
+12=12.13
when unit trips
+5=0.86
SB=2.67 whoa! Unit comes back on. seems to stay on
hmmm. do it all over again. boom same results. and one more time to be sure. presto it comes back on and seems...Leave a comment:
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Re: Insignia NS-LTDVD26-pwr board MIP260B- tracking down shut down issue
"Check the voltages on the connectors" are you talking about the pin connector behind the words "didn't replace cap" on my 8th pic?Leave a comment:
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Re: Insignia NS-LTDVD26-pwr board MIP260B- tracking down shut down issue
yes, there is picture. I have a dvd playing so I have a signalLeave a comment:
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Re: Insignia NS-LTDVD26-pwr board MIP260B- tracking down shut down issue
don't hear any squeeling or buzzing. measured the main cap on standby = 159.7v, with unit turned on = 389v, and when the unit "trips off" = 389v
I don't know how I'm going to test the voltage of the transistors while the unit is on. I had been testing with the diode testing from the back of the board touching the pins, but to do it with the unit on, I would need to probe the legs of the transistors and that's a tight squeeze not to make contact with something else.
The board...Leave a comment:
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Insignia NS-LTDVD26-pwr board MIP260B- tracking down shut down issue
Ok as the titles says, I'm working on a Insignia NS-LTDVD26. Everything seems to work fine (DVD player, antenna, rca, vga, blah blah) for about 3-6 minutes and it turns off, sorta.
So let's start: standby LED comes on "red" voltage checks good.
Turn on the set, LED turns blue, good to go.
When the set "turns off" audio and video turn off, but blue LED stays lit. Doesn't go back to standby red, doesn't turn off, stays blue.
The unit won't turn off when I hit the power button, I have to literally unplug it (or turn off the power strip it's... -
Re: Proview PL926Wbi - recapped, same shut off issue
Yup, powers up and is as good as gold. Funny how in both cases, it was the bulbs and not the caps. (not that changing them out for good ones didn't hurt) I just want my old fashion monitor powered by a hamster and wheel. Wheels needed a little WD-40 and hampsters just needed to be fed, and were cheaply replaced if they died....Leave a comment:
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Re: Proview PL926Wbi - recapped, same shut off issue
What I have learned:
LCD panel corners are easy to crack when the light goes out in the workshop just as your separating the screen case, an you attempt to set it back down carefully, and the corner just catches the edge of the case and doesn't want to support the weight of the entire panel. Needless to say the original monitor I've been working on here is screwed.
Dunno about replacing an LCD panel or if it's even worth it.
I've learned the working with CCFLs sucks! I turned to working on the 2nd monitor...Leave a comment:
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Re: Proview PL926Wbi - recapped, same shut off issue
Thank you. I'm now wondering what is going to be more difficult. Checking/Changing out CCFL tubes for the first time, or finding somewhere in my house without dog hair. lol
Again. Thanks. I will attempt to keep updated on success or failure.Leave a comment:
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Re: Proview PL926Wbi - recapped, same shut off issue
Ok I now know what bulbs are bad. On the 1st monitor, the one this thread is about, I definitely know 1 that is really bad. (Made the 2nd monitor screech and fritz), and am a little suspicious of a 2nd bulb on the first monitor. I know which bulb is bad on the 2nd monitor. OK! Small steps to success. (little happy dance)
Ok sensei, now what?Leave a comment:
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Re: Proview PL926Wbi - recapped, same shut off issue
ok that's what I'm working on now. Correct me if I'm in error.
I have both monitors next to each other. The 1st monitor has 3 of the 4 ccfl connected to the inverter board.
The second is not connected to it's board at all. I am connecting 1 of the ccfl connectors from the 2nd monitor to the 1st inverter board (the 4th spot).
Fire it up. If it doesn't work, turn off, wait a minute, disconnect ccfl connection from 2nd monitor and move it to then next connection up on the first monitor. (say the 3rd slot...Leave a comment:
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Re: Proview PL926Wbi - recapped, same shut off issue
I've got a 2nd monitor that I'm working on, but to seems to have the same problem. There is always my wife's monitor that works. hmmmmm
So if 1 CCFL is bad, all 4 will shut off?
(has breaking a wife's monitor in the process of checking for a bad CCFL ever been used as grounds for divorce before?)Leave a comment:
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Re: CCFL Lamp Testing
SgtRock, that tester you posted doesn't come with a power cable. What amp rating is required with the 12v power cable?Leave a comment:
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Re: Proview PL926Wbi - recapped, same shut off issue
Should I be getting a volt reading from when I test the actual connectors on the inverter that lead to the CCFLs? My DCV only goes up to 1000.
update: never mind I guess it can easily go up and over 1300vLast edited by Wyld_Goose; 04-13-2013, 06:08 PM.Leave a comment:
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Re: Proview PL926Wbi - recapped, same shut off issue
I did a test on the transistors Q5 and Q6 per [url]https://www.badcaps.net/forum/showthread.php?t=7366[/url] thread which deals with the same power board as I have.
Testing pins 1 -3 via 1-2, 1-3, 2-3 to both resister and compare the numbers,then reverse the readings. (My diode tester doesn't give me an option to set it to 2000 or anything else. It simply is what it is)
1-2 on both = 1145 ohms
1-3 on both = 678 ohms
2-3 on both = (climbs up to over 2000 ohms then says "1")
...Last edited by Wyld_Goose; 04-13-2013, 04:38 PM.Leave a comment:
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Re: Proview PL926Wbi - recapped, same shut off issue
I see what my first problem is, when i touch the probes together for an ohms test, my meter reads 002 @2000 ohms. =/
with that said.. S1-S2 I get a reading of 797, S3-S4 I get 805, and both fuses read 002 (which is the same when I touch the probes together.....so should be good?
sigh! faulty equipment.
Got caps in today for my second monitor that did the same thing a few years ago, just decided to hang on to it up in the closet. Wanna guess what my results were after recapping it? GRRR!...Last edited by Wyld_Goose; 04-13-2013, 03:46 PM.Leave a comment:
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Re: Proview PL926Wbi - recapped, same shut off issue
S1-S4 @ meter set to 2000 ohms all read 002
I feel like a bit of a dunce. I'm not sure how to check the fuses. My multimeter doesn't have a continuity function on it. DCV, ACV, DCV, battery tester, OHMs, transistor tester and diode tester is what I got.Leave a comment:
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Re: Proview PL926Wbi - recapped, same shut off issue
Caps are all in the correct polarity. I was very anal about this seeings how it was my first repair job. Drew up a diagram for myself and everything. But just to check because you asked............. yup totally confirmed.
What happens is exactly what the 2 second to black describes. Click pwr button. blue LED comes on. Screen comes on, then 2-3 seconds later it goes black. No clicks or any sounds. No smells either (I have honestly expected some kind of smell all along) The blue LED stays lit. Hold a flashlight up...Last edited by Wyld_Goose; 04-13-2013, 02:09 PM.Leave a comment:
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Re: Proview PL926Wbi - recapped, same shut off issue
The 1st pic is what I believe to be the logic board.
The 2nd pic is a pic of the 200-000-170DTLBMH power board. All caps, except the 100uF 400v, have been replaced.
The 3rd pic is of the reverse side of the power board. Took quite a few pics to get clear identifiers of the points.
OK, so what is the inverter board?
Here are all of the measure voltage readings from all caps, +5, BLON & +14 pins and the HV CCFL outputs:
C11 220uF 25v Measured @ 14.69v
C12 220uF...Leave a comment:
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Re: Proview PL926Wbi - recapped, same shut off issue
I will probably upgrade all of the caps, but for the time being to solve the issue, what I have should be fine. Just not for anything beyond getting this back on it's feet. I will get some pics posted here soon. Leave it to me to have searched for postings but missed the sticky "A guide on how to troubleshoot 2 seconds to black" at the top of this thread. doh!
[URL="https://www.badcaps.net/forum/showthread.php?t=10419"]https://www.badcaps.net/forum/showthread.php?t=10419[/URL]
Could...Last edited by Wyld_Goose; 04-12-2013, 08:28 PM.Leave a comment:
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