RCA RT2770 Support Question
Find answers below for this question about RCA RT2770 - Receiver Home Theater System.Need a RCA RT2770 manual? We have 2 online manuals for this item!
Question posted by jmall2684 on April 29th, 2017
Hello, I Am Looking For A Psu As Well. Have You Had Any Luck In Finding
Current Answers
Answer #1: Posted by Troubleshooter101 on May 3rd, 2017 2:57 AM
I have RCA RT2770 and have diagnosed the problem.
R202 along with C211 make up the "snubber network" for the fast action diode pack (TO5 Tab mounted on 2nd large heatsink) labeled D207. This resister is so burnt, on my unit, the color bands are not readable, so the value can not be determined. Obviously, by size, this is a 1 watt resistor. This resistor goes out when C211 shorts out at high voltages. Normal testing will not show the short, since it is an arching short at high voltage. On my system C211 has no markings so I need this value also.
From my knowledge of High Efficiency Switching Power Supplies, they use high frequency switching (pulse width modulation is used to vary signal width to increase amperage under load). Snubber networks are needed to chop off the high voltage spikes that occur. These spikes vary as the input voltage varies. Typical voltage here in the US varies from 105 to 125 VAC. Therefore the spike voltages at the upper end can easily exceed 30 KVAC.
Since I used to repair switching power supplies, the design engineers typically under rate the capacitor at 10-25 KVAC, which should be 35-50 KVAC. So when you replace this capacitor, get one with same capacitance rating (critical for resonance with the frequency of the design) but add 10-20 KVAC to the voltage rating from the schematic (35-50 KVAC).
I'm trying to find the value of these 2 components, so please share if you have this knowledge.
This power supply is used in many similar surround sound and audio amp system by RCA, so this solution will be good for other models also.
Failure of the snubber network is the most common failure in switching power supplies, so hope this is added to a FAQ section, if it exists here on this forum.
Please respond to my effort to provide you with the best possible solution by using the "Acceptable Solution" and/or the "Helpful" buttons when the answer has proven to be helpful. Please feel free to submit further info for your question, if a solution was not provided. I appreciate the opportunity to serve you!
Troublshooter101
Related RCA RT2770 Manual Pages
RCA Knowledge Base Results
We have determined that the information below may contain an answer to this question. If you find an answer, please remember to return to this page and add it here using the "I KNOW THE ANSWER!" button above. It's that easy to earn points!-
Menu Setup Information for DRC300N DVD Player
... enter the password you are formatted to a receiver via the DIGITAL AUDIO OUT jack (COAXIAL or...is highlighted, and press OK. controls how the picture looks. Use the arrow buttons on the remote control to ... Lock is off . What settings can I find acceptable, and press OK. Even if you... the DVD Player Menu on the RCA RTD315W Home Theater System If you want to 8 with Chapter 1. To... -
Menu Setup Information for DRC220N DVD Player
... arrow buttons to enter the password you find setup information for this feature - The Main...looks. The Lock Menu: You can set . Enter your program (playlist) in step 3. Setting Rating Limits: The Rating Limits feature lets you can turn the feature on the RCA RTD315W Home Theater System...please refer to your DVD Player to a receiver via the DIGITAL AUDIO OUT jack (COAXIAL... -
Support Account or Account Login
... Remote Control Cloths Wipes Kits Home Antennas AM/FM Antennas Indoor Outdoor Home Audio Shelf Systems Home Speakers Home Wired Speakers Home Subwoofers Home Speaker Covers Home Wireless Speakers Home Theater Systems Shuttle Systems Home Radio Internet Under Cabinet CD Player Radio Wireless Transmitter or Receiver Home Satellite Products Satellite Radio Receiver Satellite Radio Boombox Satellite...
Similar Questions
Where can I get a replacement remote control for my RT2770 Home Theater System?
subwoofer
i have the RRT2911 - 5.1 Channel 1000 Watt Home Audio Theater System Speakers/Receiver and it wont ...
I would like to know if it is possible to connect my Klipsch 2.1 ProMedia computer speakers to myRCA...