[TechAssist] Re: rca P46100TN-CTC169BN-need convergence amp board schematic-FIXED
- From: Richard La Placa <continentaltv@xxxxxxxxx>
- To: techassist@xxxxxxxxxxxxx
- Date: Wed, 27 Oct 2004 17:06:54 -0700 (PDT)
Hello everyone and Many thanks- I removed all the output transistors and
noticed that the board was turning to carbon between the traces. I scraped it
off and cleaned everthing off with denatured alcohol and a stiff brush. Then I
replaced all the red transistors with new ones and the thing is running cool
now. The only problem I had was the bottom left red vertical pin convergence
was serpentine and very critical but I finally got it passable.I'm really glad
you sent these tips because they will really be helpful on new jobs.
Gary McCartney <gary@xxxxxxxxxxx> wrote:Richard, I found the following in my
data. Maybe something will help:
-----------------------------------------------------------
<< Here is what I've had come to me several times.
CTC169BH:
Replace Q09v , I think it is a green xsistor and ONLY use OEM component.
(located at 23-K) I would also at the same time replace:
Q13 and R59
(suspect also but not necessairly Q15, 16, 17)
this should solve the problem
tom s. >>
this one was a warranty from one of my friends younger techs. thanks to
zeus
I found easily the solution the prob/ was the Q12; THE OVERHEATING TR were
Q10 AND Q11 located in the green conv/ section I owe you one; this is the
second time I get benefit from repairworld you can count on me IF IT IS
in my
hands to give you a hand. for now I am working mostly in the new MGA
diamond
kind.
see you soon jose posada los ang. CA.
******************************************************
This tip is for: RCA PTV CTC169BL
Problem: Convergence Jumping Vertically On Any One Of The 3 Crt's
Info: Dick's Radio & Tv, Inc.
Fix: If It's A "blue" Problem...r7119 Will Run Hot! Replace Q7031 (148996)
If It's A "red" Problem...r7077 Runs Hot! Replace Q7019 (148996) If It's
A "green" Problem...r7037 Runs Hot! Replace Q7007 (148996)
----------------------------------------------------------------
This is an RCA PTK169BNA chassis. The blue convergance is way off and I
changed Q7035 and Q7036 and R7119 . Now R7119 gets hot really fast. As
per a tip I have on my computer from Dick's TV, I found that Q7031 is
bad. The service manual calls for a 148996.
----------------------------------------------------------------
Gary McCartney
McCartney Electronics
Guelph Ontario Canada
Est. 1984
email: gary (at) number63.ca
Richard La Placa wrote:
> Al sent me a scan of the red convergence section and I might have enough to
> go on here.Thanks everybody. I'll post the results as soon as I figure out
> this problem
> Richard La Placa wrote:Help!
> I changed the red vertical amp output transistors and they are getting red
> hot. I checked as many other parts on this board to no avail. Some small
> transistor basings are marked wrong from the factory, or somebody before me
> might have put the wrong parts in here.They want over $80.00 for a schematic
> and I will never need it again. Can somebody sell me a copy of this output
> board. It has the ps &op amps all on same board.TIA!
>
>
> Richard La Placa
> Continental TV
> 312 a Park Row
> Chestertown, Md, 21620
> http://www.continentaltv.homestead.com
> 410-778-1113 (voice & fax)
>
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> Richard La Placa
> Continental TV
> 312 a Park Row
> Chestertown, Md, 21620
> http://www.continentaltv.homestead.com
> 410-778-1113 (voice & fax)
>
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Richard La Placa
Continental TV
312 a Park Row
Chestertown, Md, 21620
http://www.continentaltv.homestead.com
410-778-1113 (voice & fax)
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