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Crumbtrail TV Forums: TV Equipment: TV Repair Forum:
samsung repair

 
 


bombidragon
New User

Jul 17, 2010, 12:08 AM

Post #1 of 22 (1317 views)
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samsung repair Can't Post
I have a 26" Samsung tube tv that i removed the case off of to use as a arcade monitor.. Took the case off and got it mounted and there is no picture. Turns on makes all the fun degaussing and crackling noises. The normal buzz noise changes when I switch channels just no picture. It has a separate board for the ir and the power button that got broke in half in the process but i do not need the ir and i figured out what pins are power.

Any basic stuff i can check?

thanks



jts1957
Veteran


Jul 17, 2010, 12:31 AM

Post #2 of 22 (1316 views)
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Re: [bombidragon] samsung repair [In reply to] Can't Post
Arcade monitors usually don't need/use tuner. R/G/B/H&V Sync; some even use SVGA plugs.

Of course you could connect cable to it and watch HBO.Cool


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Location: Far, Far Away


bombidragon
New User

Jul 17, 2010, 12:43 AM

Post #3 of 22 (1312 views)
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Re: [jts1957] samsung repair [In reply to] Can't Post
i think you misunderstood. I am using a tv as a arcade monitor that will hook to a pc via s-video. I got it all handled except for the fact i have no video after i took the case off and mounted it. Its gotta be something easy. I do get a little about 20v ac shock from the grounds which is a little weird but i have little experience with tvs.


jts1957
Veteran


Jul 17, 2010, 2:36 AM

Post #4 of 22 (1311 views)
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Re: [bombidragon] samsung repair [In reply to] Can't Post
You are attempting to put it on a external input (A/V1, Line In)? Usually NOT channel up/channel down. "VIDEO" button on remote perhaps?

Quote
except for the fact i have no video after i took the case off and mounted it.
This implies you DID have video BEFORE taking the case off and mounting it.Unsure

20VAC - could be worse. Try holding a cold water pipe and a ground at the same time with opposite hands.





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Location: Far, Far Away


bombidragon
New User

Jul 18, 2010, 5:12 AM

Post #5 of 22 (1299 views)
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Re: [jts1957] samsung repair [In reply to] Can't Post
i got that part handled with the switching of channels. i just need basic tips on what to check to start out with. like check voltage between points ab that kind of stuff.

thanks


becyn
New User

Jul 18, 2010, 4:28 PM

Post #6 of 22 (1294 views)
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Re: [bombidragon] samsung repair [In reply to] Can't Post
Quote
i think you misunderstood. I am using a tv as a arcade monitor that will hook to a pc via s-video. I got it all handled except for the fact i have no video after i took the case off and mounted it. Its gotta be something easy. I do get a little about 20v ac shock from the grounds which is a little weird but i have little experience with tvs.
Ok, I'll state the obvous questions:
1) did set the tv to the proper input?
2) define "no video" no hv no sound no anything or just no video?
3) do you see a menu if you press the menu button?

I was "shocked" to read some of the other stuff, but I will refrain from commenting. I hope you read the site dislaimers.
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Visit McVey Electronics for TV Repair!


bombidragon
New User

Jul 18, 2010, 7:03 PM

Post #7 of 22 (1290 views)
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Re: [becyn] samsung repair [In reply to] Can't Post
no light output from the tube.


becyn
New User

Jul 18, 2010, 7:11 PM

Post #8 of 22 (1289 views)
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Re: [bombidragon] samsung repair [In reply to] Can't Post
*sigh*
Too vague
How about going through the questions above, answering them in a clear and succinct way.
"no light from the tube doesn't tell me if you get a menu, sound,or what mode the set is in".
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Visit McVey Electronics for TV Repair!


bombidragon
New User

Jul 18, 2010, 7:21 PM

Post #9 of 22 (1288 views)
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Re: [becyn] samsung repair [In reply to] Can't Post
really, this is amazing. No menu nothing the tube is not lit up , no photons are coming out of the screen.

I do get the highfrequency buzzing sound from the electronics and you can hear it change when you switch channels and inputs. It degausses like normal.

thanks


(This post was edited by bombidragon on Jul 18, 2010, 7:24 PM)


becyn
New User

Jul 18, 2010, 7:36 PM

Post #10 of 22 (1282 views)
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Re: [bombidragon] samsung repair [In reply to] Can't Post
Ok so everything works EXCEPT getting a pix?
Off the top of my head:
1) some older sets had "service mode" switches that when set in a position would intentionally kill the video. These were usually a plastic toggle switch located on the CRT "neck board". You may have hit that.

2) video mute due to vertical deflection failure.
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Visit McVey Electronics for TV Repair!


bombidragon
New User

Jul 18, 2010, 7:54 PM

Post #11 of 22 (1281 views)
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Re: [becyn] samsung repair [In reply to] Can't Post
no switch checking the website out now. I would figure it would have been a plug or wire but i cant find any extras


bombidragon
New User

Jul 18, 2010, 7:56 PM

Post #12 of 22 (1280 views)
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Re: [bombidragon] samsung repair [In reply to] Can't Post
not really any info on site unless i want to send it in. :(


bombidragon
New User

Jul 18, 2010, 8:40 PM

Post #13 of 22 (1275 views)
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Re: [bombidragon] samsung repair [In reply to] Can't Post
got a website with alot of info, The crt filament is not glowing and i have horizontal deflection. The rest i dont know about. How do i test the circuit for the crt filament


jts1957
Veteran


Jul 18, 2010, 10:00 PM

Post #14 of 22 (1269 views)
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Re: [bombidragon] samsung repair [In reply to] Can't Post
Shall we try pulling teeth... I mean extracting a model number?


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Location: Far, Far Away


bombidragon
New User

Jul 18, 2010, 10:11 PM

Post #15 of 22 (1265 views)
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Re: [jts1957] samsung repair [In reply to] Can't Post
i dont have the outside case anymore i hucked it 2 weeks ago. it is a Mitsubishi tube.

it would be easy to figure it out with pics because it has the power button at the top


(This post was edited by bombidragon on Jul 18, 2010, 10:14 PM)


jts1957
Veteran


Jul 18, 2010, 10:20 PM

Post #16 of 22 (1261 views)
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Re: [bombidragon] samsung repair [In reply to] Can't Post
Hold a neon lamp against main body of flyback - does it light?


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Location: Far, Far Away


bombidragon
New User

Jul 18, 2010, 11:13 PM

Post #17 of 22 (1258 views)
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Re: [jts1957] samsung repair [In reply to] Can't Post
yes it does so that has power

Florescent light correct?


(This post was edited by bombidragon on Jul 18, 2010, 11:14 PM)


jts1957
Veteran


Jul 18, 2010, 11:38 PM

Post #18 of 22 (1254 views)
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Re: [bombidragon] samsung repair [In reply to] Can't Post
NEON - hold glass bulb against - NOT leads.





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Location: Far, Far Away


bombidragon
New User

Jul 19, 2010, 12:03 AM

Post #19 of 22 (1250 views)
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Re: [jts1957] samsung repair [In reply to] Can't Post
dont have one on me and it lit up a whole 36 inch florescent tube by putting it next to it. same effect i would think.


jts1957
Veteran


Jul 19, 2010, 12:41 AM

Post #20 of 22 (1246 views)
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Re: [bombidragon] samsung repair [In reply to] Can't Post
Confirms you have high voltage.

Without model number - can't search for service literature to find out how CRT filament is supplied with power.


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Location: Far, Far Away


becyn
New User

Jul 19, 2010, 12:46 AM

Post #21 of 22 (1244 views)
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Re: [bombidragon] samsung repair [In reply to] Can't Post
Dude! You don't make it easy.
No model number, vague info, etc.
Well, my friend, it's like this:
If there is no crt filament light (and you checked this in the dark), then that is a bad thing.
On the neck board check for filament continuity. ( labelled H) If that's Ok, then there is an open circuit between the filiment connections and the flyback.
This could take the form of loose wire, cracked board, open solder or open fuseable resistor link.
Since you have chucked the model data, that's all anybody can tell you.
Good luck...
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Visit McVey Electronics for TV Repair!


bombidragon
New User

Jul 19, 2010, 12:55 AM

Post #22 of 22 (1243 views)
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Re: [becyn] samsung repair [In reply to] Can't Post
thanks for all of the help

 
 
 


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