Question about RCA F36649 36" TV

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F32672sb pincushion I am an electronics teacher at a high school and trying to figure out why this tv has a pincushion display......any help would be greatly appreciated

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Re: F32672sb pincushion

The pincushion is something that happens to this particular set. You may have the blue box type Capacitor in this set if not then a more brown or redish orange cap. I believe it is C4401. Most of the time its behind the Horizontal output. The cap gets leaky, most of the time it's a .47uf @250v. Try this, hope this helps

Posted on Sep 11, 2007

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Pin problems

I assume that the pincushion problem to your TV, ie, the display have curved vertical lines [X] shape. If so, the pincushion circuit should be troubleshooted. Check the transistor of this stage. Try to download the repair manual to this set. It will have all details. Is it a Sony TV? If so, try this link. up older posts.

Dec 26, 2013 | Standard (CRT) Televisions

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I have a RCA model F32672sb chas.number CTC187cl3 that the picture has a hour glass display meaning the two sides are shrunk in.Everything else seems ok.

From your description you probably have a horizontal sweep circuit problem. Unfortunately, the days of taking off the back cover of your TV and replacing a defective tube or fuse are long gone. Proper servicing will require troubleshooting procedures that can only be performed by a qualified electronic repair facility or professional television repair person. Ask for an estimate and a realistic appraisal of whether the set can be adequately fixed. Depending on the age and condition of your TV it may not be cost effective to repair.

Sep 13, 2009 | RCA F32672SB 32" TV

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How do i get to the input/video screen on the RCA F32672sb 32

If you have an old vcr hook the dvd player to the inputs on back of the vcr (RCA jacks) Run a coax cable from the "out" on the vcr to the back of tv. Turn the tv on channel 4 or 3 then put a tape in the vcr and push record then pause it. Or if the vcr has a tv/video button you can push or activate it and it should allow the dvd to play through to the tv.

Feb 10, 2009 | RCA F32672SB 32" TV

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I need to find the pincushion circuit on my RCA F32632SB TV to check a problem with the TV displaying an hour glass picture. Where can I find a picture of this or a manual to guide me to the circuit?

The pincushion it intimately related to the horizontal circuits,the electron beam must travel farther to reach the corners of the crt and it does to the middle and so without pincushion circuits the raster would be bowed in on the sides on crts 27 inches are larger.Pincushion corrections straightens the raster by modulating the horizontal yoke current at a vertical rate.In an RCA tv the pincushion circuits are usually numbered 4800and the pin amp will probably be numbered 4801,its drive transistor should be Q4802,R4802 will be the width control,and R4805 the e/w pin amplitude. its inputs from the vertical should be Q4801 (subtractor) Q4803 (buffer) you should have a parabola waveform at 4801,yoke current can be modulated here without effecting high voltage.when Q4802 conducts voltage should decrease across Q4801 and the voltage drop across the yoke increases. The east west pin amp control 4805 controls how much of the vertical parabola is input to U4801 to compensate for changes in width caused by variations in beam current.By varying the e/w control resistor you can know if the circuit fault is in the input or output,if the picture varies in size the fault is in the input to U4801,if it does not vary check the output or U4801......hope that helps

Jan 15, 2009 | RCA F32632SB 32" TV

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Have you ever had this problem?

Sorry Ginko, but a convergence problem would have the curves down from the top and up from the bottom. The hourglass shape is a pincushion problem. This can be as simple as a bad capacitor in the pincushion circuit.

Could you please confirm the model number so I can look up the probable part?


Jan 08, 2009 | RCA F32632SB 32" TV

1 Answer

Thank you for the suggestion

I have the schematic diagram if you need it.
Let me know where to send it to.

Apr 21, 2008 | Emerson EWF2004 20" TV

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Rca tv model # F32672SB

The fuse is a 5 amp,can get at any electronics store

Jan 09, 2008 | RCA F32672SB 32" TV

1 Answer

Apex PF3230 TV with pincushion problem.

too dangerous for a home repair as this requires replacement high voltage components and adjusting the set with the back off while running.
Take to repair store.

Nov 08, 2007 | Apex Digital PF3230 32" TV

1 Answer

No picture, just a high pitch sound

Sounds like the flyback and horz output is shorted.

Nov 30, 2006 | RCA F32672SB 32" TV

1 Answer


There is a pincussion correction circuit in this RCA TV set that does have problems from time to time. Its in the horizontal High voltage sweep circuit and should only be worked on by a trained tech as there is alot of High ZVoltage there. In this set there is no user replaceable parts inside, as everything is soldered into place. It could be in your case a pincussion correction driver transistor or the coupling capacitor or capacitors that need to be replaced. if your not trained in the high voltage circuits , for your safety, please call in a local repair person to assist you in this repair.

Sep 23, 2006 | RCA F32650 32" TV

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