RCA F36650 Will Not power on Buzzing Churping when plugged in
I have an RCA F36650 YX01 ATC113CA1
A few months ago the picture would randomly disapear and come bad, then recently it made a pop and no picture and loud buzzing churping puslsating sound. If you even try to plug it in it makes the same noise and will not turn on. I replaced the flyback transformer, hoping that was it, and it still does the same thing and will not power on, is there anything else that would cause this what could make such a noise and what part might need replacing where would i be located.
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To your unit RCA F36650/CHASSIS # ATC113CA1, I posted replies to your original problem here. FBT would be the FlyBack Transformer or Line OutPut Transformer (LOPT).A ring test is check for the FBT out of circuit using an instrumentthat sends pulses to the FBT's primary circuit. Thereafter a comparatorcircuitry checks the number of damped oscillations or 'rings' producedand determines if the primary is good or not. Incidentally, it could also be the power supply unit (PSU). You could verify by doing the check on the HOT or lifting the supply to the main B+ going to the FBT and trying it. It the PSU powers up and the light lits as well as the sound comes up, the PSU is good and HOT/FBT is suspect. You might be better off getting hold of a service manual or at least a schematic diagram.
Incidentally, 13 years is a rather long time in electronics with the technology changing at such a fast pace. 13 years ago we still have a few Betamax and laserdisc players especially those by Pioneer.
Fly back transformer will cause a buzzing sound like this. Really up to you how bad it bothers you it can be fixed but it will cost a couple hundred dollars. If you can solder you can put it in yourself but the flyyback will still cost a little bit of money.
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.
Apparently, a power supply weakness re-occurring........ Possible incomplete or incorrect repair the first time..... Have it diagnosed by a qualified RCA tech...... Always a possibility = IHVT = 257805 or asti 2078.......T.
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