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Crumbtrail TV Forums: TV Equipment: Projection TV Forum:
Round 2 with the RCA PTK195 61"

 

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Ron.M
Veteran


Aug 24, 2015, 8:49 PM

Post #51 of 177 (5637 views)
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Re: [Misfire] Round 2 with the RCA PTK195 61" [In reply to] Can't Post

 

Misfire;....


Quote
there is a slight wetness at the funnel neck of glass, where it horn's out,, im sure it had gotten into the red coils of white part i removed,,, could that be causing the issue?

Quite possibly , yes !!!!

OK , we have 2 ways to do this...
1)..
See if a replacement yoke is still available & order one...
2)..
Remove the BLUE yoke EXACTLY as you did with the red yoke , SWAP the red yoke on the BLUE CRT & see what color you get in the box...
DO NOT do this until I give you further instructions..

And your choice is......


Later...Ron.M...Cool...
Veteran & Retired TV technician


Misfire
User


Aug 25, 2015, 12:33 AM

Post #52 of 177 (5623 views)
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Re: [Ron.M] Round 2 with the RCA PTK195 61" [In reply to] Can't Post

when i very first logged on here few months ago looking inside the set is when i noticed the coolant diaphram had leaked TV coolant on to the CRT board, I replaced the faulty seal I do know that ethylene glycol plays havic with electrical circuitry. can it not be cleaned up? Have you known TV coolant to do that?


Misfire
User


Aug 25, 2015, 1:44 AM

Post #53 of 177 (5619 views)
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Re: [Misfire] Round 2 with the RCA PTK195 61" [In reply to] Can't Post

OK, I found the problem,,, The ethalene -glycol did play a role in corroiding a coil wire in the winding into,,, would post a picture but photo bucket is still messed up, ever had any luck repairing a single strand? I know the wire is coated.


Ron.M
Veteran


Aug 25, 2015, 3:59 PM

Post #54 of 177 (5609 views)
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Re: [Misfire] Round 2 with the RCA PTK195 61" [In reply to] Can't Post

 

Misfire;....

Yes , ethylene glycol plays havoc with electrical / electronic circuits...


Quote
would post a picture but photo bucket is still messed up, ever had any luck repairing a single strand? I know the wire is coated.

Need to see which wiring is affected ...

Try http://imageshack.com

Here is how to use imageshack;=>..
http://www.tv-forums.com/...g=imageshack;#157911

Take a GOOD , CLEAR , CLOSE-UP of the wiring damaged & post as instructed in the thread...EXCEPT for the following;=>..

Quote
"links to share this image"...
Click on that & click again on "Direct Link" & copy it , paste it in a new tab to open a new window..

Copy the "Direct Link" & post it here...

EDIT:...
Imageshack has changed their layout & possibly their format !!!...Frown..
You'll have to figure that out on your own...
Find & post a "Direct Link..
Good Luck.....Smile.



Thanks...

Later...Ron.M.....Cool....
Veteran & Retired TV technician

(This post was edited by Ron.M on Aug 25, 2015, 4:16 PM)


Misfire
User


Aug 26, 2015, 1:46 PM

Post #55 of 177 (5556 views)
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Re: [Ron.M] Round 2 with the RCA PTK195 61" [In reply to] Can't Post

http://i776.photobucket.com/albums/yy45/Misfire_photo/CAM00601.jpg
i slightly lifted each end of broken wire,soldered back together and coated repair with fingernail polish pushed back in place,,, that was the fix other than convergence is off and is missing from the menu,,, in the process of scrolling thru the menu looking at things,,, The TV picture started strobing/flashing at me and i hear a hissing sound now,,, WTF?


Ron.M
Veteran


Aug 26, 2015, 3:54 PM

Post #56 of 177 (5543 views)
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Re: [Misfire] Round 2 with the RCA PTK195 61" [In reply to] Can't Post

 

Misfire;....


ALL bad news , I'm afraid....Unsure...

IF that break is on the Horiz winding , & it looks like it is , it can not be fixed...
A better pix a little further away from the problem would help me determine that for sure...
That winding has a high voltage pulse on it & fingernail polish is not a strong enough insulator...
Chances are that the strobing / flashing / hissing you are seeing could be coming from arcing at the break you attempted to repair...
The ONLY fix here is to replace the yoke...
That's only part of the bad news...
The part number for that yoke is;..
240618

I've done an EXTENSIVE search for one & ALL results show that that yoke is NO LONGER AVAILABLE !!!...

Sorry about that...

Wish I had better news !!!...


Later..Ron.M.....Cool...
Veteran & Retired TV technician


Misfire
User


Aug 26, 2015, 7:49 PM

Post #57 of 177 (5536 views)
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Re: [Ron.M] Round 2 with the RCA PTK195 61" [In reply to] Can't Post

If that is what the hissing/strobing is from,,, I can fix that,,, I had eagerly done that to verify that was the repair needed, just sit tight and I will have further thoughts on the repair and get back to you on getting all the screens square again, should I start a new thread on that?


Ron.M
Veteran


Aug 26, 2015, 10:32 PM

Post #58 of 177 (5528 views)
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Re: [Misfire] Round 2 with the RCA PTK195 61" [In reply to] Can't Post

 

Misfire;....

No , you don't need to start another thread...
This applies to the same TV...

What you mean by "getting all the screens square again," ??
Do you mean NORMAL again & NOT like the red was ???


Later/...Ron.M...Cool...
Veteran & Retired TV technician


Misfire
User


Aug 27, 2015, 3:56 AM

Post #59 of 177 (5521 views)
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Re: [Ron.M] Round 2 with the RCA PTK195 61" [In reply to] Can't Post

seems photobucket back to normal, I went back over my coil winding repair with some nice silicone sealer, Its good repair,, the noise is defiantly less and is coming from HV splitter? (white thing redirects to guns) checked all wires pushed in, slightly move them the sound pitch changes, trying not get bit, still no convergence in menu,,
http://i776.photobucket.com/albums/yy45/Misfire_photo/CAM00603.jpg
http://i776.photobucket.com/albums/yy45/Misfire_photo/CAM00604.jpg


Ron.M
Veteran


Aug 27, 2015, 4:03 PM

Post #60 of 177 (5508 views)
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Re: [Misfire] Round 2 with the RCA PTK195 61" [In reply to] Can't Post

 

Misfire;....

OK , WHAT happened to the Blue convergence ???...
Looks like the red is back to what it should be...Smile...


"""HV splitter? (white thing redirects to guns)"""
Where is that located /??

""no convergence in menu""
Look under "Setup"...
Could have something to do with Blue problem...


Later..Ron.M...Cool....
Veteran & Retired TV technician


Misfire
User


Aug 27, 2015, 5:54 PM

Post #61 of 177 (5504 views)
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Re: [Ron.M] Round 2 with the RCA PTK195 61" [In reply to] Can't Post

This thing, anyway to tighten the connections on these? this is whats buzzing, all holes ohm out the same, as far as the blue convergence? I have no idea, But it is all working again other than not square,
http://i776.photobucket.com/albums/yy45/Misfire_photo/CAM00605.jpg


Ron.M
Veteran


Aug 27, 2015, 10:44 PM

Post #62 of 177 (5497 views)
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Re: [Misfire] Round 2 with the RCA PTK195 61" [In reply to] Can't Post

 

Misfire;....

Check the ends of ALL the red wires for darkened spots &/or indications of arcing..

Get a flashlight & look down inside each hole for darkened spots &/or indications of arcing..

Look on the bottom side for a black pinhole , darkened spots &/or indications of arcing..


Later...Ron.M...Cool...
Veteran & Retired TV technician


Misfire
User


Aug 28, 2015, 12:28 AM

Post #63 of 177 (5489 views)
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Re: [Ron.M] Round 2 with the RCA PTK195 61" [In reply to] Can't Post

this project reminds me when I use to work on Jaguar cars, almost cant fix them fast enough before something else breaks, I bet you cringed at site of old TV to work on.
anyways, no sir, no blacked or carbon tracking going on other than cannot see metal holding tabs for the IN wire from fly-back transformer, and that's the one when wire is moved some the sound changes,,, I will dip the wire end in solder to tighten it up in hole unless you guys have another approved method?


Misfire
User


Aug 28, 2015, 10:08 AM

Post #64 of 177 (5484 views)
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Re: [Misfire] Round 2 with the RCA PTK195 61" [In reply to] Can't Post

I blew out the holes in splitter with compressed air and fed some .025 safety wire in the smaller holes and felt friction from the little metal tabs so don't think have to solder anything. I have not reinstalled the splitter yet because I have a question about another resister, should I go ahead and replace the one that's bleached out? have no idea what its value is?
http://i776.photobucket.com/albums/yy45/Misfire_photo/CAM00607.jpg
I thought this was weird, the aluminum is cooked black around this resister and this is only mosfet to have silicone like heat transfer,
http://i776.photobucket.com/albums/yy45/Misfire_photo/CAM00612.jpg
i just noticed this, think someone's been here before,
http://i776.photobucket.com/albums/yy45/Misfire_photo/CAM00613.jpg


jts1957
Veteran


Aug 28, 2015, 12:07 PM

Post #65 of 177 (5481 views)
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Re: [Misfire] Round 2 with the RCA PTK195 61" [In reply to] Can't Post

R14512 239110 xx11062-630 RES WW 2W 10% 150R
150 ohm 2 watt flameproof 13 volt supply

U14501 7 pin vertical output IC - cant make out a location number.

Red to red ,,, green to green


-------------------------
Location: Far, Far Away

(This post was edited by jts1957 on Aug 28, 2015, 12:15 PM)


Ron.M
Veteran


Aug 28, 2015, 4:18 PM

Post #66 of 177 (5472 views)
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Re: [Misfire] Round 2 with the RCA PTK195 61" [In reply to] Can't Post

 
Misfire;...


Quote
should I go ahead and replace the one that's bleached out? have no idea what its value is?

Use your handy-dandy DVM to check & see what it reads...
Desolder one end of R14512...
Put your meter on ohms & check the resistance..
Post reading..


Quote
the aluminum is cooked black around this resister

That could be due to age & usage..
To make sure , look for the Ref number Rxxxxx & post it & I or jts1957 will ID it's value & go from there...




Quote
i just noticed this, think someone's been here before,

Those are the yoke connections..
Due to the way the circuitry is in these TVs , it makes NO difference which way those 2 & the blue are connected..
Has to do with the fact that the vertical windings of the yokes are hooked up in series with each other & the horizontal windings are hooked up in parallel with each other..


Quote
cannot see metal holding tabs for the IN wire from fly-back transformer,

Need close-up pix of the end of that wire...


Quote
I will dip the wire end in solder to tighten it up in hole unless you guys have another approved method?

Wait till we determine the result of the above pix...

Later...Ron.M...Cool...
Veteran & Retired TV technician


Misfire
User


Aug 30, 2015, 11:52 AM

Post #67 of 177 (5449 views)
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Re: [Ron.M] Round 2 with the RCA PTK195 61" [In reply to] Can't Post

this is the HV wire from fly-back coil,, it seemed to have a green corrosion on it,
http://i776.photobucket.com/albums/yy45/Misfire_photo/CAM00619.jpg
I went ahead and replaced the 150ohm res that had turned white, I checked the old resistor and it ohmed out at 160 ohm's. as far as the resister next to aluminum heat sink,,, there are no numbers for it,,, seems if that res blacked that aluminum the res should look cooked also I would think,, maybe its been replaced befor?


Misfire
User


Aug 30, 2015, 3:40 PM

Post #68 of 177 (5441 views)
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Re: [Misfire] Round 2 with the RCA PTK195 61" [In reply to] Can't Post

And I have no idea whats going with this thing now,,, still no convergence in menu,, is there anyway to get some kind of fault codes from this thing?
http://i776.photobucket.com/albums/yy45/Misfire_photo/CAM00622.jpg


Ron.M
Veteran


Aug 30, 2015, 4:02 PM

Post #69 of 177 (5437 views)
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Re: [Misfire] Round 2 with the RCA PTK195 61" [In reply to] Can't Post

 
Misfire;....

Yes that wire doesn't look healthy...
Take a sharp knife & gently scrape the end of that wire clean...
Do the other wires have a copper colored (or another color) connector with the wire coming thru the center of it & soldered or spot welded in place ??...

The resistor next to the heat sink does not look damaged in any way to me & is most likely OK ...

EDIT:...
Try switching the Red & Blue convergence connections at J19301 & J19303 ...
Do you have Instruction / Owners Manual for this TV ???.


Later...Ron.M....Cool...
Veteran & Retired TV technician

(This post was edited by Ron.M on Aug 30, 2015, 4:11 PM)


Misfire
User


Sep 1, 2015, 5:45 PM

Post #70 of 177 (5399 views)
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Re: [Ron.M] Round 2 with the RCA PTK195 61" [In reply to] Can't Post

all the hissing and fizzing noise has gone, I swapped the red and blue as said, picture looks little better and I had the convergence adjustment for a little while then it disappeared,,, I do have a owners manual but cannot find it at this times, altho there was really nothing in it that was helpful considering I had read it cover to cover a few times,


Ron.M
Veteran


Sep 1, 2015, 6:35 PM

Post #71 of 177 (5393 views)
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Re: [Misfire] Round 2 with the RCA PTK195 61" [In reply to] Can't Post

 
Misfire;....

Just to humor some people (Myself included) , correct this hookup that jts1957 mentioned;=>..

http://i776.photobucket.com/...e_photo/CAM00613.jpg


Owners Manual for your TV;=>..
http://www.rca.com/...tv_manual_search.php
Insert your model number , click on "Submit & then select "
Model P61937 RCA 61 Projection TV (1551933B/2001 Revision) Manual (pdf)""


IF the Green convergence image is NOT SQUARE & LINEAR across the top & bottom , left to right , STOP HERE & post a pix of it...
IF it looks like it SHOULD , proceed as instructed below..
Open the manual to page 34...
On the "Adjust Projection TV" page , IF NEEDED , adjust "Blue Convergence (#2) & Red Convergence (#3)..
Perform those steps ONLY !!!..
Do NOT do "Advanced Convergence ( #4) UNTIL I CLEAR IT WITH YOU !!!!..
That is tricky & you CAN MESS IT UP EASILY...
Post a pix of how the set looks AFTER you reset the connectors & BEFORE you tinker with the convergence......


Thanks...


Later...Ron.M...Cool...
Veteran & Retired TV technician

(This post was edited by Ron.M on Sep 1, 2015, 6:55 PM)


Misfire
User


Sep 2, 2015, 4:14 AM

Post #72 of 177 (5381 views)
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Re: [Ron.M] Round 2 with the RCA PTK195 61" [In reply to] Can't Post

That's why I said (looks like someone has been here before)
the red gun is labeled green and plugged into the red socket,,, I corrected the situation by removing labels I dont think belonged there to begin with.
adjust the convergence? I would love to if it would stay in settings and not disappear,,, most time its not there to start with, something is not letting me have that option at this time.


jts1957
Veteran


Sep 2, 2015, 7:46 AM

Post #73 of 177 (5375 views)
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Re: [Misfire] Round 2 with the RCA PTK195 61" [In reply to] Can't Post


Quote
Yeaaa, I removed the larger board that the rainbow wires go to from PS just to look over and clean up and found a ball of black goo. guessing where the coolant had leaked from and attacked the solder joints, cleaned it up and resoldered the transistor and Whamo!


Might have been that guy?


-------------------------
Location: Far, Far Away


Misfire
User


Sep 2, 2015, 11:13 AM

Post #74 of 177 (5372 views)
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Re: [jts1957] Round 2 with the RCA PTK195 61" [In reply to] Can't Post

I didn't label connectors,,, I took foto's, lets see, facing the the TV normally, from left to right it is R,G,B. am I correct? red to back of board, green in middle and blue up front, if you look at the one cable connector that was labeled RED, it has a green convergence sticker around cable,, I specifically pointed an arrow to that, I did not label connectors. <br>and whats the deal with TV info? especially on old TV's? why so taboo? its easier getting Hillarie's E-mails than info on RCA projector TV. <br>

question? This TV offers error codes in service mode, or is that not anything?


(This post was edited by Misfire on Sep 2, 2015, 11:22 AM)


jts1957
Veteran


Sep 2, 2015, 11:59 AM

Post #75 of 177 (5367 views)
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Re: [Misfire] Round 2 with the RCA PTK195 61" [In reply to] Can't Post

http://imgur.com/xzcgf8O
http://imgur.com/CDRm2AA

Now that you have them, what's it saying to you?


-------------------------
Location: Far, Far Away

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