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another PTK195 RCA 61" convergence problem

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Misfire
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Oct 16, 2014, 4:37 PM

Post #26 of 48 (6380 views)
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Re: [jts1957] another PTK195 RCA 61" convergence problem [In reply to]	Can't Post

http://i776.photobucket.com/albums/yy45/Misfire_photo/IMG_20141015_212814.jpg
Well I didn't go to TV school, and regardless if the STK has 11 or 12 pins? There be 12 terms on this board regardless if it dosnt use all them. So I think you want me to un glue or un solder the STK to check other than prob the backside?
http://i776.photobucket.com/albums/yy45/Misfire_photo/IMG_20141015_213448.jpg
just pointing out where AC goes in and and wondering how much of board was AC vs DC, The red box indicates an area that is discolored do to heat.

Ron.M
Veteran

Oct 16, 2014, 5:24 PM

Post #27 of 48 (6362 views)
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Re: [Misfire] another PTK195 RCA 61" convergence problem [In reply to]	Can't Post

Misfire;...

IF you are going to get sassy here then we'll have a problem...
jts1957 & I both tried to explain to you about pins 8/9 & 11/12...
You come back & post;=>..

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OK, ohming out term 8) to term 10)11)12),,,

Which is NOT what we were talking about !!!

We SPECIFICALLY said;=>..

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Read ohms from either pin 8 OR 9 TO pin 11 OR 12 to see IF you blew the IC..

So , IF you can't understand simple instructions , WHY do you say this ???;=>..

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and the way you talk about this board and being safe,,,,

I do NOT know what you know & what you don't know...
So , IF you feel intimidated or insulted by what I said , I have the solution for that...

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I guess this is one of those times where the repair manual say's (test with known good one) lol

NOT MINE !!!

PLEASE DO THE FOLLOWING:=>...

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I think he fried the same IC again. check for short between pins 8/9 & 11/12.

jts1957 is an EXCELLENT tech & it would be wise to listen to him & do EXACTLY as he & I suggest !!!

Later...Ron.M... Cool

...
Veteran & Retired TV technician

Ron.M
Veteran

Oct 16, 2014, 5:32 PM

Post #28 of 48 (6358 views)
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Re: [Misfire] another PTK195 RCA 61" convergence problem [In reply to]	Can't Post

Misfire;....

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So I think you want me to un glue or un solder the STK to check other than prob the backside?

WHAT problem on the backside ????

jts1957 & I never said a word about "un glue or un solder the STK" ...
So , its NOT a good idea to guess what we are thinking OR put words in our mouths...
Had he wanted you to , I suspect he would've said do it thataway ..

Later...Ron.M.. Cool

..
Veteran & Retired TV technician

jts1957
Veteran

Oct 16, 2014, 5:40 PM

Post #29 of 48 (6354 views)
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Re: [Misfire] another PTK195 RCA 61" convergence problem [In reply to]	Can't Post

J19701 is the place where the convergence power (SUPPLY) and the convergence circuit (LOAD) can be easily separated. Checking for leakage and/or shorts on pins 1, 2, 5 & 6 at both the socket (SUPPLY) and the plug (LOAD) can tell us whether the power supply or the convergence circuitry have any obvious faults that may (or may not) be repeatedly destroying the STK730-130.

The 'AC' portion of the board is approximately from the STK (NOT including the STK pins) to the edge of board where the AC plugs in. The 'Primary' Is between the STK (pins included) to approximately the center of the large transformer (HOT ground). And the 'secondary' is approximately from the center of the large transformer to the J19701 edge of the board (COLD ground).

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

(This post was edited by jts1957 on Oct 16, 2014, 7:28 PM)

Misfire
User

Oct 16, 2014, 6:06 PM

Post #30 of 48 (6348 views)
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Re: [Ron.M] another PTK195 RCA 61" convergence problem [In reply to]	Can't Post

Ron,,Any sassy or smart butt thing I might say is do to my ignorance in this field or just don't understand. I have had elec DC from aviation school and a Mercedes Benz Master Tech for 16 yrs, ( would think I should have the money to buy new stuff) but I work for myself now so im broke, lol. Your other friend tech just had me laffing my butt off yesterday. I by no means am a porsche mechanic and far from being the sharpest knife in the drawer. The phrase,,, test with known good one, Actually comes from GM auto repair manuals when I worked at a Chevrolet dealership many,many yrs ago and it's used at the very end of a diagnostic run when you have exhausted all testing means. And all real auto tech's are paid on straight commission, no salary and comm, straight commission pay.
Am I here to insult you guy's? By all means no, Is this TV im working on a pain? Its really no different than any other things in life to figure out, It's my first. I know you guy's have seen thousands of em. I'm actually having a good time with the TV cause I have no ole lady wanting to watch it and hounding me for a TV that works.lol. If I have offended anyone, Im sorry and wasn't trying to, just trying to fix a TV, learn a little and have a good time doing it. that's all. I did say take it easy on me in the first post, hehe

Misfire
User

Oct 16, 2014, 6:38 PM

Post #31 of 48 (6341 views)
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Re: [jts1957] another PTK195 RCA 61" convergence problem [In reply to]	Can't Post

OK, from back reading post, still a little confused on what the 8/9 & 11/12 means, Is this at the STK? check for short from pin to pin or to grnd? or to the rainbow 6 wire plug J19701? I cant find a P19701 on this board.

Ron.M
Veteran

Oct 16, 2014, 6:59 PM

Post #32 of 48 (6334 views)
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Re: [Misfire] another PTK195 RCA 61" convergence problem [In reply to]	Can't Post

Misfire;....

OK , we have an understanding...
I presumed you were ignorant (Do not confuse this word with stupid !!!) by what you said in your first post , hence the detailed replies....

Lets move on & do exactly as jts1957 asked.
PLease post results..
Thanks...
Later....Ron.M... Cool

...
Veteran & Retired TV technician

jts1957
Veteran

Oct 16, 2014, 7:19 PM

Post #33 of 48 (6326 views)
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Re: [jts1957] another PTK195 RCA 61" convergence problem [In reply to]	Can't Post

STK pin to pin - one meter lead on: 8/9 = 'pin 8 and/or 9' ... the other meter lead on: 11/12 = 'pin 11 and/or 12'.

In Reply To

Two connectors: One two pin for AC in (J19700) & One 6 pin for Output (J19701)

Try a 'J' then. TOP (component) side of pcb.
one meter lead stay on ground throughout - use pin 3 of the jack for the pcb - for the plug use tuner case (or pin 3 of the plug). (God let us hope he can figure out how to back probe the plug. Angelic

)

The pcb has the JACK that you insert the rainbow wire PLUG into.

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

(This post was edited by jts1957 on Oct 16, 2014, 7:46 PM)

Ron.M
Veteran

Oct 16, 2014, 7:33 PM

Post #34 of 48 (6317 views)
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Re: [Misfire] another PTK195 RCA 61" convergence problem [In reply to]	Can't Post

Misfire;....

"8/9" means that they are the SAME connection & you can measure from either & get the SAME result...

"11/12" means that they are the SAME connection & you can measure from either & get the SAME result...
They are mechanically & electronically connected together...
They are pin numbers..

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Is this at the STK?

YES !!!

P19701 is the connector that plugs into "the rainbow 6 wire plug J19701"...
You will not find it labeled on the board...

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check for short from pin to pin or to grnd?

He wants you to read between those pins to "HOT" ground...
Thats the "-" side of C19702..
That means pin 8 to 11 OR 12 , OR pin 9 to 11 OR 12....

And read from pins 1, 2, 5 & 6 at both the socket and the jack.
Use pin 3 of J19701 (socket) when reading the board pins...
Use pin 3 of P19701 (Jack/plug) when reading the wiring to the convergence board..

PLEASE post results...

Later...Ron.M... Cool

..
Veteran & Retired TV technician

(This post was edited by Ron.M on Oct 16, 2014, 8:19 PM)

Misfire
User

Oct 17, 2014, 6:43 AM

Post #35 of 48 (6292 views)
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Re: [Ron.M] another PTK195 RCA 61" convergence problem [In reply to]	Can't Post

http://i776.photobucket.com/albums/yy45/Misfire_photo/met1.jpg
http://i776.photobucket.com/albums/yy45/Misfire_photo/met2.jpg
http://i776.photobucket.com/albums/yy45/Misfire_photo/met3.jpg
http://i776.photobucket.com/albums/yy45/Misfire_photo/met4.jpg
http://i776.photobucket.com/albums/yy45/Misfire_photo/met5.jpg
http://i776.photobucket.com/albums/yy45/Misfire_photo/met6.jpg
http://i776.photobucket.com/albums/yy45/Misfire_photo/met7.jpg
http://i776.photobucket.com/albums/yy45/Misfire_photo/met8.jpg
http://i776.photobucket.com/albums/yy45/Misfire_photo/met9.jpg
Still confused on j/p connector? am I? looking for a voltage drop across connector plugged in? like a bad connection? meter lead to mail pin other to same female pin while unplugged and checking resistance across another board?

jts1957
Veteran

Oct 17, 2014, 4:49 PM

Post #36 of 48 (6286 views)
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Re: [Misfire] another PTK195 RCA 61" convergence problem [In reply to]	Can't Post

I would have used 2K setting. (Just leave it at 200 for consistency for now).
I'm presuming you had PS board out of set & plugs detached for all those pictures?
Resistance readings ARE what I want.
Now do the same with the PLUG connections. Leave convergence PS disconnected. Leave everything else connected. You DO NOT disconnect and remove convergence board to take the following readings. You may connect to the pins in the plug itself or you may prefer to go to the far end of that cable (where it plugs into the convergence pcb) and measure the same 4 pins. Your black lead can reference tuner cover or a ground on the convergence pcb (C19310 negative or minus lead for example).

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

(This post was edited by jts1957 on Oct 17, 2014, 4:51 PM)

Ron.M
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Oct 17, 2014, 5:39 PM

Post #37 of 48 (6280 views)
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Re: [jts1957] another PTK195 RCA 61" convergence problem [In reply to]	Can't Post

jts1957;.....

Looks to me like he's using the SAME ground for all the readings !!!

Good Luck....

Later...Ron.M... Cool

...
Veteran & Retired TV technician

(This post was edited by Ron.M on Oct 18, 2014, 7:44 PM)

jts1957
Veteran

Oct 17, 2014, 5:46 PM

Post #38 of 48 (6277 views)
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Post deleted by jts1957 [In reply to]

Ron.M
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Oct 17, 2014, 6:01 PM

Post #39 of 48 (6269 views)
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Re: [jts1957] another PTK195 RCA 61" convergence problem [In reply to]	Can't Post

jts1957;...

NO , the reading he's doiing in that one is FINE !!!!..

In the top pix in my post , you'll see that he is using the "-" side of C19702 which is CORRECT for reading the IC...

Now look at the bottom pix & you'll see that he is using the SAME foil pattern when reading the pins on J19701...
The 2 circuits have DIFFERENT GROUNDS...
At least in my manual they do....

Later...Ron.M... Cool

...
Veteran & Retired TV technician

jts1957
Veteran

Oct 17, 2014, 6:12 PM

Post #40 of 48 (6265 views)
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Re: [Ron.M] another PTK195 RCA 61" convergence problem [In reply to]	Can't Post

So we'll tell HIM he needs to REPEAT the 4 J19701 readings using the foil connected to pin #3 for referencing his black lead. Unsure

It's Friday and I'd just woken up, but apparently not awakened enough. Crazy

Quote

Using you volt meter connect the "-" to chassis ground...
A good place for that is the tuner cover or cable connector...
You will be reading "-" DC voltages from pins 1 , 2 , & "+" voltages from pins 4 , 5 & 6...
Set the board in a SAFE way so you can take those readings with the TV turned on & the convergence screwed up..
Pin 3 is ground , so you should get "0.0" vdc there...

BESIDES, I thought you had already covered the ground reference for the 'connector'!

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

(This post was edited by jts1957 on Oct 17, 2014, 6:39 PM)

Ron.M
Veteran

Oct 17, 2014, 6:28 PM

Post #41 of 48 (6257 views)
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Re: [jts1957] another PTK195 RCA 61" convergence problem [In reply to]	Can't Post

jts1957;...

Sounds good to me ....

Might want to have him bring up the range on his meter too...

And I thought I was a late sleeper !!!!..

Later...Ron.M... Cool

...
Veteran & Retired TV technician

(This post was edited by Ron.M on Oct 17, 2014, 6:30 PM)

Misfire
User

Oct 17, 2014, 6:50 PM

Post #42 of 48 (6245 views)
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Re: [Ron.M] another PTK195 RCA 61" convergence problem [In reply to]	Can't Post

I did scale the meter per every term check,,, was a on going process, and you instruct me to use term 3 at the J plug in on pcb for the rainbow wires? I will have to go re read that post, just cant do it right now. and thanks guy's Wink

jts1957
Veteran

Oct 17, 2014, 6:53 PM

Post #43 of 48 (6244 views)
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Re: [Ron.M] another PTK195 RCA 61" convergence problem [In reply to]	Can't Post

Quote

I would have used 2K setting. (Just leave it at 200 for consistency for now).

200 ohm {or less} IS a pretty goodly amount of leakage.

As long as he does both plug & jack with SAME Ground references and meter range setting, I'll be purring happily.

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

Misfire
User

Oct 21, 2014, 6:50 AM

Post #44 of 48 (6204 views)
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Re: [jts1957] another PTK195 RCA 61" convergence problem [In reply to]	Can't Post

http://i776.photobucket.com/albums/yy45/Misfire_photo/IMG_20141021_013551.jpg
http://i776.photobucket.com/albums/yy45/Misfire_photo/IMG_20141021_011827.jpg
http://i776.photobucket.com/albums/yy45/Misfire_photo/IMG_20141021_011857.jpg
http://i776.photobucket.com/albums/yy45/Misfire_photo/IMG_20141021_011915.jpg
http://i776.photobucket.com/albums/yy45/Misfire_photo/IMG_20141021_011934.jpg
Other meter had died on me over the weekend so got a newer one. I hope I am doing what you guy's ask is right?

jts1957
Veteran

Oct 21, 2014, 7:16 AM

Post #45 of 48 (6201 views)
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Re: [Misfire] another PTK195 RCA 61" convergence problem [In reply to]	Can't Post

Quote

Now do the same with the PLUG connections. Leave convergence PS disconnected. Leave everything else connected. You DO NOT disconnect and remove convergence board to take the following readings. You may connect to the pins in the plug itself or you may prefer to go to the far end of that cable (where it plugs into the convergence pcb) and measure the same 4 pins. Your black lead can reference tuner cover or a ground on the convergence pcb (C19310 negative or minus lead for example).

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

Misfire
User

Oct 22, 2014, 10:50 AM

Post #46 of 48 (6194 views)
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Re: [jts1957] another PTK195 RCA 61" convergence problem [In reply to]	Can't Post

http://i776.photobucket.com/albums/yy45/Misfire_photo/IMG_20141022_053144.jpg
http://i776.photobucket.com/albums/yy45/Misfire_photo/IMG_20141022_053116.jpg
http://i776.photobucket.com/albums/yy45/Misfire_photo/IMG_20141022_053244.jpg
http://i776.photobucket.com/albums/yy45/Misfire_photo/IMG_20141022_053306.jpg
http://i776.photobucket.com/albums/yy45/Misfire_photo/IMG_20141022_053328.jpg
Using the cable connector as grd, Now I did have a brief flash of numbers except on the 6 or blk wire. and I did have a flash of numbers while checking the board for previous post also on 1 and 2 pins.

Misfire
User

Oct 26, 2014, 10:56 AM

Post #47 of 48 (6149 views)
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Re: [Misfire] another PTK195 RCA 61" convergence problem [In reply to]	Can't Post

Did I stump you guy's?? No clue's or hint's? lol, No worry's I found the problem, It is fixed! 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! And big thanks guys!
http://i776.photobucket.com/albums/yy45/Misfire_photo/IMG_20141023_212556.jpg
http://i776.photobucket.com/albums/yy45/Misfire_photo/IMG_20141023_230519.jpg

jts1957
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Oct 26, 2014, 4:50 PM

Post #48 of 48 (6143 views)
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Re: [Misfire] another PTK195 RCA 61" convergence problem [In reply to]	Can't Post

Well, everything that you were measuring was indicating PS / convergence board had no direct shorts - under static conditions.
Leaking coolant can be so unpredictable.

Glad to see it worked out for you.

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

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