toshiba 20AF41 pincushion


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toshiba 20AF41 pincushion

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boo
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Nov 20, 2010, 8:40 PM

Post #1 of 9 (948 views)
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toshiba 20AF41 pincushion	Can't Post

Moderate pincushion upon turn-on and after a few minutes the pincushion recedes and both sides of the screen are perfectly normal with straight,vertical and parallel sides. Any ideas on the cause upon turn-on??

jts1957
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Nov 21, 2010, 12:58 AM

Post #2 of 9 (933 views)
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Re: [boo] toshiba 20AF41 pincushion [In reply to]	Can't Post

Bad electrolytic capacitor in pincushion circuits? Wink

20" sets usually do NOT have pincushion circuits.
What is H.O. collector B-Plus at turn on vs. warmed up?

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

(This post was edited by jts1957 on Nov 21, 2010, 1:04 AM)

Ron.M
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Nov 21, 2010, 7:30 PM

Post #3 of 9 (918 views)
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Re: [jts1957] toshiba 20AF41 pincushion [In reply to]	Can't Post

jts1957;.....

Quote

What is H.O. collector B-Plus at turn on vs. warmed up?

Here goes another meter !!!!.....

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

.....
Veteran & Retired TV technician

jts1957
Veteran

Nov 21, 2010, 7:53 PM

Post #4 of 9 (914 views)
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Re: [Ron.M] toshiba 20AF41 pincushion [In reply to]	Can't Post

Doesn't everybody have GOOD quality test equipment like I do?(Sencore, Fluke) Smile

Be thankful I didn't have him use his tongue. Tongue

Apparently it DOES have Parabola, Trapezium, Corner Corr Top & Bottom adjustments???

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

(This post was edited by jts1957 on Nov 21, 2010, 8:14 PM)

Ron.M
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Nov 21, 2010, 9:01 PM

Post #5 of 9 (910 views)
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Re: [jts1957] toshiba 20AF41 pincushion [In reply to]	Can't Post

jts1957;....

Quote

Doesn't everybody have GOOD quality test equipment like I do?(Sencore, Fluke)

Duh....ah , NO !!!

Quote

Apparently it DOES have Parabola, Trapezium, Corner Corr Top & Bottom adjustments???

Altho I'm not familiar with this model , I don't think his problem is as simple as an adjustment....
Looks more like a thermal problem with a cap in the Horiz circuit OR one of the above circuits.....

Good Luck , anyway.... Sly

....

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

....
Veteran & Retired TV technician

(This post was edited by Ron.M on Nov 21, 2010, 9:02 PM)

jts1957
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Nov 21, 2010, 9:43 PM

Post #6 of 9 (905 views)
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Re: [Ron.M] toshiba 20AF41 pincushion [In reply to]	Can't Post

I was just pointing out that if it has pincushion adjustments, then it follows that it should have pincushion circuits. Tongue

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Location: Far, Far Away

Ron.M
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Nov 21, 2010, 9:52 PM

Post #7 of 9 (899 views)
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Re: [jts1957] toshiba 20AF41 pincushion [In reply to]	Can't Post

jts1957;.....

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I was just pointing out that if it has pincushion adjustments, then it follows that it should have pincushion circuits.

Absolutely correct , & I was just adding my 2 cents worth...

Now boo has 4 cents.... Sly

...

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

....
Veteran & Retired TV technician

jts1957
Veteran

Nov 21, 2010, 10:27 PM

Post #8 of 9 (896 views)
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Re: [Ron.M] toshiba 20AF41 pincushion [In reply to]	Can't Post

What if boo were Canadian eh? He could be Loonie with $$ for eyes. Wink

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Location: Far, Far Away

Ron.M
Veteran

Nov 21, 2010, 11:42 PM

Post #9 of 9 (891 views)
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Re: [jts1957] toshiba 20AF41 pincushion [In reply to]	Can't Post

jts1957;.....

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What if boo were Canadian eh?

Would that make him boo hoo ????

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

....
Veteran & Retired TV technician

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