Round 2 with the RCA PTK195 61": Page 7


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Round 2 with the RCA PTK195 61"

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jts1957
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Sep 28, 2015, 5:16 PM

Post #151 of 177 (4987 views)
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Re: [Misfire] Round 2 with the RCA PTK195 61" [In reply to]	Can't Post

Should see plus AND minus 15 & 45 volts on Boosts &/or Outputs. I don't see any 7 volts.

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Location: Far, Far Away

Misfire
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Sep 29, 2015, 9:16 AM

Post #152 of 177 (4962 views)
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Re: [jts1957] Round 2 with the RCA PTK195 61" [In reply to]	Can't Post

outlined in grey (bad choice in color) are the 2 alum cooling fins that are not even getting warm,
http://i776.photobucket.com/albums/yy45/Misfire_photo/CAM00705.jpg
I made a youtube video of checking transistors on convergence board but missed a couple, these photo's are ones I missed on video.
http://i776.photobucket.com/albums/yy45/Misfire_photo/CAM00723.jpg
http://i776.photobucket.com/albums/yy45/Misfire_photo/CAM00724.jpg
https://youtu.be/nOv6lNV_kIY

jts1957
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Sep 29, 2015, 10:04 AM

Post #153 of 177 (4959 views)
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Re: [Misfire] Round 2 with the RCA PTK195 61" [In reply to]	Can't Post

I prefer the photos with arrows/voltages over the YT video - Photos you CAN at least zoom in and make out device location numbers.

In Reply To

outlined in grey (bad choice in color) are the 2 alum cooling fins that are not even getting warm,
http://i776.photobucket.com/albums/yy45/Misfire_photo/CAM00705.jpg
I made a youtube video of checking transistors on convergence board but missed a couple, these photo's are ones I missed on video.
http://i776.photobucket.com/albums/yy45/Misfire_photo/CAM00723.jpg One on the left should be '-'15V
http://i776.photobucket.com/albums/yy45/Misfire_photo/CAM00724.jpg
https://youtu.be/nOv6lNV_kIY

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Location: Far, Far Away

(This post was edited by jts1957 on Sep 29, 2015, 10:08 AM)

Ron.M
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Sep 29, 2015, 4:30 PM

Post #154 of 177 (4951 views)
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Re: [Misfire] Round 2 with the RCA PTK195 61" [In reply to]	Can't Post

Misfire;...

Quote

4 of 6 large aluminum fins warm,

Quote

You may have discovered something !!!..
How about posting the Reference numbers of the transistors/ICs on the "cool" heat sinks..
It may be worth checking into...

WHAT part of the above did you NOT understand ???...
Pictures that do NOT show "REFERENCE" numbers OR videos that the "REFERENCE" numbers are even MORE unrecognizable do NOT cut it !!!...
"REFERENCE" numbers begin with "Q1xxxx" OR U1xxxx" & CAN be found either on the component (PART) side of the board OR the foil (SOLDER) side of the board NEAR the transistor OR IC !!!
Let's try this again..OK ???..

Later...Ron.M... Cool

....
Veteran & Retired TV technician

jts1957
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Sep 29, 2015, 6:09 PM

Post #155 of 177 (4946 views)
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Re: [Ron.M] Round 2 with the RCA PTK195 61" [In reply to]	Can't Post

Q19306 / Q19307 / Q19355 / Q19356.

Red & Blue Horiz.

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Location: Far, Far Away

(This post was edited by jts1957 on Sep 29, 2015, 6:10 PM)

jts1957
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Sep 29, 2015, 6:12 PM

Post #156 of 177 (4944 views)
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Re: [Misfire] Round 2 with the RCA PTK195 61" [In reply to]	Can't Post

Quote

Photos you CAN at least zoom in and make out device location numbers.

Well, some people can. Wink

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Location: Far, Far Away

Misfire
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Oct 2, 2015, 1:19 AM

Post #157 of 177 (4772 views)
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Re: [jts1957] Round 2 with the RCA PTK195 61" [In reply to]	Can't Post

I'm kinda lost guy's,,,, from the still foto's,,, there are reference numbers to be seen on back side of the convergence board, the cooling fin I had skipped accidentally is the one in still foto that has two,,, and the photo of accidental forgot mosfet pin in other still foto,,,, that cooling fin is dead also,,,, in the video after the voltage check from power supply, those are the transistors on the cooling fin that is closest to front of TV.

jts1957
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Oct 2, 2015, 1:41 AM

Post #158 of 177 (4768 views)
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Re: [Misfire] Round 2 with the RCA PTK195 61" [In reply to]	Can't Post

Quote

Q19306 / Q19307 / Q19355 / Q19356.

Red & Blue Horiz.
http://i776.photobucket.com/albums/yy45/Misfire_photo/CAM00723.jpg One on the left should be NEGATIVE 15 volts

DO I? have the items referenced correctly? based upon being able to enlarge the fotos. If so, would suggest you go back and do the rest (the ones you did in video), giving them the same voltage / arrow treatment

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Location: Far, Far Away

Misfire
User

Oct 4, 2015, 8:17 AM

Post #159 of 177 (4756 views)
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Re: [jts1957] Round 2 with the RCA PTK195 61" [In reply to]	Can't Post

14.9V is not considered 15V?

jts1957
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Oct 4, 2015, 8:26 AM

Post #160 of 177 (4753 views)
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Re: [Misfire] Round 2 with the RCA PTK195 61" [In reply to]	Can't Post

Quote

14.9V is not considered 15V?

IF your insisting that BOTH collectors ARE positive, THAT would be a MAJOR problem.

POSITIVE 15 volts is 30 volts away from NEGATIVE 15 volts! (15/14/13/12/11/10/9/8/7/6/5/4/3/2/1/0\-1\-2\-3\-4\-5\-6\-7\-8\-9\-10\-11\-12\-13\-14\-15)(30 - 'there ain't no zero')

http://imgur.com/hiMmJ93
Q19306 & Q19307 Right?
Top and Bottom of stack (totem pole)
Q19307 #49 source (MINUS 15V) & Q19306 #43 source (POSITIVE 15V)

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Location: Far, Far Away

(This post was edited by jts1957 on Oct 4, 2015, 8:50 AM)

Misfire
User

Oct 5, 2015, 12:12 AM

Post #161 of 177 (4744 views)
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Re: [jts1957] Round 2 with the RCA PTK195 61" [In reply to]	Can't Post

Well,,, I went to go check the voltages as you asked,,, while turning on the TV set, I got a flash show,, seems the high voltage splitter from flyback has let go, will post picture as soon as can find camera cable to computer,

Misfire
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Oct 5, 2015, 5:15 AM

Post #162 of 177 (4740 views)
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Re: [Misfire] Round 2 with the RCA PTK195 61" [In reply to]	Can't Post

Sooo, wondering whats happing with this thing to do this,
http://i776.photobucket.com/albums/yy45/Misfire_photo/CAM00730.jpg

jts1957
Veteran

Oct 5, 2015, 5:48 AM

Post #163 of 177 (4736 views)
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Re: [Misfire] Round 2 with the RCA PTK195 61" [In reply to]	Can't Post

Your YT video had excessive hissing in background ~30 seconds & onward.
Wires you and Ron were discussing earlier.

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Location: Far, Far Away

(This post was edited by jts1957 on Oct 5, 2015, 5:50 AM)

Misfire
User

Oct 5, 2015, 9:56 AM

Post #164 of 177 (4732 views)
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Re: [jts1957] Round 2 with the RCA PTK195 61" [In reply to]	Can't Post

that was another reason for vid so could also hear what was going on,,,, what to do now? did the splitter go bad or something cause that?

jts1957
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Oct 5, 2015, 10:52 AM

Post #165 of 177 (4729 views)
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Re: [Misfire] Round 2 with the RCA PTK195 61" [In reply to]	Can't Post

Its bad NOW.

Did we lose Ron? Or what?

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Location: Far, Far Away

Misfire
User

Oct 5, 2015, 6:12 PM

Post #166 of 177 (4721 views)
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Re: [jts1957] Round 2 with the RCA PTK195 61" [In reply to]	Can't Post

Geees,,,, gonna try to find a splitter and do you think that convergence can be fixed? I would rather by an oscilloscope than major TV parts, at least the scope could be used for other things.

Ron.M
Veteran

Oct 10, 2015, 5:19 PM

Post #167 of 177 (4660 views)
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Re: [Misfire & jts1957] Round 2 with the RCA PTK195 61" [In reply to]	Can't Post

jts1957;...

Just watching the show...

Misfire;....

In case you're interested...
eBay has your HV Splitter for $10.00 + #5.00 s&h..
Also has a 14 day return with money back...

Check here;=>..
http://www.ebay.com/...?hash=item35dad6c121

Doubt that it would bring back convergence ...

GOOD LUCK... Wink

...

Later...Ron.M.... Cool

...
Veteran & Retired TV technician

Misfire
User

Oct 11, 2015, 7:21 AM

Post #168 of 177 (4651 views)
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Re: [Ron.M] Round 2 with the RCA PTK195 61" [In reply to]	Can't Post

I don't know what or why it did that,,, under further inspection, the flame traveled back out of the HV input tube on the splitter from fly-back to ground,,, I soda -blasted the splitter and got rid of any carbon tracking and was able to cut 3" off input wire and put back together,,Its back working again,,, back to where we were,,,
question? sometimes the screen or all 3 guns at same time want to flicker back and forth between trying to have square to guessing concave or bowing on all sides of picture, happens too fast to take a foto of it. I'm trying to give all the hints I can at whats going on.

Misfire
User

Oct 12, 2015, 7:30 PM

Post #169 of 177 (4634 views)
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Re: [Misfire] Round 2 with the RCA PTK195 61" [In reply to]	Can't Post

OK, So I know the reason for the flashback of the splitter,,, I had poor connections,,, I have that fixed now, The set doesn't make a sound now, . something is getting hot causing the flickering because it doesn't do it when first turned on, only after it warms up,
I was going back to check the transistor's on the convergence board after propping the board up to access the bottom side, (of course being careful as hell with it) The convergence power supply is not working properly now. question? the convergence board turns on the power supply when TV turned on?

jts1957
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Oct 12, 2015, 8:20 PM

Post #170 of 177 (4631 views)
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Re: [Misfire] Round 2 with the RCA PTK195 61" [In reply to]	Can't Post

Post # 113.

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Location: Far, Far Away

Misfire
User

Oct 22, 2015, 8:34 AM

Post #171 of 177 (4581 views)
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Re: [jts1957] Round 2 with the RCA PTK195 61" [In reply to]	Can't Post

I'm still here guy's,,, had that (life thing going on) for a second,,, I've been poking around and I know this guy is bad,
http://i776.photobucket.com/...to/1445498152673.jpg
http://i776.photobucket.com/...to/1445498437835.jpg
http://i776.photobucket.com/...to/1445498360371.jpg

jts1957
Veteran

Oct 22, 2015, 10:23 AM

Post #172 of 177 (4574 views)
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Re: [Misfire] Round 2 with the RCA PTK195 61" [In reply to]	Can't Post

Sumtin different 'bout dem links.

May be clickeble, but can't seem to enlarge as well as the ole ones.

IF that's a standard transistor (Q19001), you should get two more readings like you show, plus two 'mediocre' meter readings. three transistor pins, two polarized meter leads = 6 possible connections/readings.

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Location: Far, Far Away

(This post was edited by jts1957 on Oct 22, 2015, 10:24 AM)

Misfire
User

Oct 22, 2015, 11:45 PM

Post #173 of 177 (4568 views)
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Re: [jts1957] Round 2 with the RCA PTK195 61" [In reply to]	Can't Post

my bad,, that transistor is good, dog gonnit, been all over this board trying find something wrong,

Misfire
User

Oct 25, 2015, 6:20 PM

Post #174 of 177 (4554 views)
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Re: [Misfire] Round 2 with the RCA PTK195 61" [In reply to]	Can't Post

OK, the convergence board has nothing to do with whats goin on now,, while looking at everything again, I was able to tap or jiggle the main board (one with fly-back) everything turned on, had power coming from CPS to conv board,,, jiggled it again and TV shut down and tried to restart 3 times and quit,,, Maybe you guy's can steer me in a direction to look at on the main board?
question? I know resisters are used to slow down the flow of current but they are not able to make voltage changes?

jts1957
Veteran

Oct 25, 2015, 6:45 PM

Post #175 of 177 (4551 views)
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Re: [Misfire] Round 2 with the RCA PTK195 61" [In reply to]	Can't Post

Things to look at: Bad solder joints, Plugs fully seated, coolant damage, 5V & 12V run supplies & error codes.

"... the system control circuitry monitors the +5 and +12V run supply directly from inputs to pins 37 and 38, once the set has been turned on. If for any reason the run supply is not present when the set is initially turned on, the microprocessor will abort the power on sequence and then try to restart the set. If after three tries the run supply is not detected, the microprocessor places the TV in the off mode. This is known as the "three strikes and your out" sequence. Pressing the power button will restart the detection process. Remember there are only three error code locations and that every start attempt will fill one of the locations. If the set is restarted, the new error codes will overwrite the ones recorded during the previous power up attempt."

'resisters' Yes, to both.

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Location: Far, Far Away

(This post was edited by jts1957 on Oct 25, 2015, 6:46 PM)

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