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Re: Need Service guide or schematic of system
I do not have a manual, but check on the board and inside chassis for a sticker that should tell you the fuse value and location. 99% of the time it's in there. The fuse itself will also be marked with its value
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My RCA 2280 receiver went out on me one day. I thought I'd have to take it to the shop. But before I do that I'll check the fuse because I took it to the shop once before and the repair man said that it was the fuse, he replace it with a new one. So I thought that I would take a look inside first. I took the cover off and looked around and notice that the fuse looked loose. It was loose. I just push it all the way in, replace the cover, plugged it back up and it worked. As far as the on and off problem goes (which happened to me too) the speaker wire coming from one of the speakers to the back of the receiver were crossed, over loading the system causing it to over heat resulting in it shutting off. I found that the wire was going from red to the gray instead of red to red and gray to gray. Once I rearranged the speaker wires I had no more problems and that was years ago. I haven't had anymore trouble sense. I've had the receiver maybe 12 years now. Except for today with the Dish Network 20.0 IR 155681 remote control for the 722k HD/DVR. I tried everything in their book but I can't get it to control the RCA 2280 surround sound volume. Anybody gotta clue? I would surely appreciate it. Good Luck.
A semi-conductor has shorted. It will continue to blow fuses until you replace the shorted component. If you have electronics background, you can locate the short with a multimeter and a schematic diagram.
You need to have the receiver serviced. The fuse is blowing because some part in the power supply or amplifier section has failed. A service technician will need to troubleshoot the unit to determine what parts need to be replaced.
You can check the fuse inside the init, take the top off and look i nthe area where the A/C cord goes to the board. Make sure the unit is not plugged into an outlet when you take the top off. You can be shocked and even worse.
If the glass fuse is OK, you will need it checked by a technician. There are no magic cures for this type of problem. It could be the transformer, a component in the power supply, the control micro, and a host of other things that can all cause this problem. Without some electronics background and all the right equipment, yu really won't be able to fix it on your own, even with help on the internet.
It is likely a short somewhere BEFORE the fuse, not the fuse itself. Follow the signal chain if possible and test connections before this. If that is not in your realm of expertise to do hands on, let the repair shop you bring it to know that there is a missing capacitor or short somewhere before "this fuse."
Problem solved! Hope this helps!
I am having this same problem. I have checked all fuses and all seem ok. Does anyone know what else might be keeping this from powering on? Any common problems that this one had to cause this? Also does anyone have a diagram of the schematics or the service manual?
Thanks in Advanced.
I had the same power problem with my th-c50. In fact, this is a common problem with this model Home Theater In a Box (HTIB). The issue truly is the fuse. All you have to do is take the cover off and replace the fuse. There are approximately 8 screws total to take the cover off and you can do it with a standard phillips screwdriver. Once the cover is off, the fuse you need to change is underneath and slightly to the right of the power input (if the box in on your lap with the front facing away from you). The stock fuse is a ceramic, white fuse and if you aren't familiar with fuses, it looks like a very small cylinder. The model number is T1AH250V. These numbers mean that it is a 1 amp, 250 volt ceramic fuse, 5 x 20 mm in size. The fuse is held together by four metal posts. Bend the posts back to take the fuse out. Go to Radio Shack or your local hardware store and get a replacement fuse with the specs above. The problem that I had is that none of my local hardware stores had a ceramic fuse with these specs, only glass. I bought the glass fuse anyway (T1AL250V) and it works beautifully. Be sure to buy a "slow blow" fuse instead of a "fast acting" as they are more durable. Insert the fuse into the slot, tighten the clamps, put the cover back on and your done! It doesn't take too long. Hope this helps.