Question about RCA F36650 36" TV

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No picture High pitch squeal RCA F36650

Hi, I have a RCA F36650 with no picture and a high pitch squeal. After checking out your site I found this solution:

replace flyback transformer (IHVT).Also,replace
horiz output transistor w/OEM or better quality.

I was curious if you had any more information about which components they are or what exactly they look like. I have a degree in electronics so I'm not to afraid to touch the stuff(well maybe a little) but I want to make sure I replace the right parts, also I've since changed fields and I'm a bit rusty. Thank you in advance

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Re: No picture High pitch squeal RCA F36650

Confirm service # from back of set = F36650 YX01..........
Transformer red HV lead attaches to CRT & Horiz output
xistor is on heatsink next to transformer = 2SC5148 .........
Rca part # 257805 or ASTI 2078 and 237470 xistor............
Do not use a generic transistor = name brand only............T.

Please rate this solution..............

Posted on Nov 13, 2007

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1 Answer


Your horizontal ouput is shorted. You might can get by with just replacing it but the flybcak may also be bad.

Jan 05, 2010 | RCA F36650 36" TV

2 Answers


A shorted horizontal output transistor or shorted flyback. If the flyback is shorted replace also its HOT.

Apr 05, 2009 | RCA F36650 36" TV

1 Answer

High pitch noise and the power light flashes.

most likely it is the flyback transformer. I have had meny RCA tv's with a bad Flyback and H.O.T transistor bad. Cost depends on the service center. Parts average around $60.00 dealer, so depending on mark up and shop labor it could vary greatly. If you have never changed these parts it is best to have a service man do it ... Take it to the shop and save the trip call charge $49.00 and up to $125.00..

Nov 18, 2008 | RCA F36650 36" TV

1 Answer

RCA Model f27650 High pitch squeal

the high pitch squeal indicates shorted component/s. the transformer goes hot co'z its being overloaded by the shorted component, it too could be the one creating the squeal!!

if you have experience with electronic troubleshooting, try to test some of the components particularly on the secondary part of the transformer.
Be careful and make sure the TV set is unplugged.
test for shorted diodes and transistors, if you're in doubt of your readings try to desoldering one leg of the diode then proceed with the testing/measuring. replace any of the bad components you find exactly with same part number or replacements with the same rating.

spend more time on it resoldering some other cold soldered components.

Oct 29, 2008 | RCA F32650 32" TV

1 Answer

RCA F36650 36" TV

is the squealing noise from the back of ur set , if so it is ur flyback transformer

May 29, 2008 | RCA F36650 36" TV

1 Answer

RCA F36650 Television . . .

It can be repaired. It sounds like a bad high voltage transformer or something in that circuit. I would take it to a TV shop and ask for an estimate. It might be costly to repair.

Apr 16, 2008 | RCA F36650 36" TV

1 Answer

Horizontal line

It looks like the squeal or high pitch is produced by the flyback part # 257805. Also check the the secondary side of the power supply for around 130VDC if that voltage is found to be lower than 120VDC I would suggest to replace CP80 with a 100 mfd@250 vdc. Part # 218374 has these parts, for the flyback transformer just type in search for FLY-391, this one is cheaper than the genuine(257805) fly back.
Good Luck.

Jan 17, 2008 | RCA F36650 36" TV

1 Answer

My rca tru flat is NFG

The high-pitched squeal usually indicates that the horizontal drive circuit has failed as a result of a dead line-output transistor. This symptom indicates that the control circuit of the main power supply is trying to over-compensate for a greater than usual secondary current. Certainly, an inspection of the line-output transistor will show that it's most likely dead. Sometimes instead of the squeal you will hear hiccups instead. Focus your attention on the horizontal circuit.

Jan 06, 2008 | RCA TruFlat 27F520T 27" TV

1 Answer

No picture no sound only the power light turn on and off

Hmm, sounds like a fuse has blown, and this is a problem that I recommend only those comfortable around high voltages try to fix......

Dec 22, 2007 | RCA F36650 36" TV

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