I have no remote for the tv Sylvania 6313ce 13" TV/VCR. I am trying to program a rca remote for it so I can change the channel to 3 so the converter box will work, how do I do that

Hello
RCA- RCU 500 model universal remote has Sylvania TV coded with. The codes are:

006,007,010,011,013,016,027,
033,035,043,049,066,087,089
Programming method

[1] Press the button of the device you want to
control (for example TV).

[2] If the device turns on, press another button,
to confirm (for example CHANNEL UP)

[3] If the device you selected (TV) responds,

you will not need to program the remote.

If the device you selected (TV) does

not respond, you will need to program
the remote
There are very rare RCA remotes, with Sylvania TV can be programmed. Just try the above codes with your present RCA remote control. If it does not help, buy the above model RCA universal remote. You will get code list and all other related documents, how to programme it or so, with the device you do purchase. OK.

Although you didn't explain what brand of universal remote this was for, all universe remotes have a code search option for this situation. Check the manual for your specific remote control for more details.
Often manufacturers of multiple brands will use the same infrared (IR) codes for all of their brands. For example, Panasonic and Quasar share the same codes as their parent company is Matsushita Industries. In your case Funai is the parent company of Sylvania and the parent company of Magnavox so you might want to try the Magnavox codes before doing a code search. As Funai also manufactures televisions for Toshiba and Sharp, so try those codes as well.

It would depend on the brand of remote but you can find most of them here:

http://www.remotecodelist.com

go to walmart and get a $10 rca universal remote and under the codes list go under vcr not tv and program it to vcr/aux

With cable input connected to "RF in"on rear of unit make sure vidoe input is set to "Tuner". This will show up on the TV screen. Change channels numerically or using up/down arrow keys on DVR remote. Note there is a slight pause between changing channels.You probably will have to "autoscan" for channel setup/etc. If you say your TV set is old; it probabaly is equiped with coax
connection only/set TV channel to "3" or "4". when yot opt to play vcr/dvd it will override your
cable channel selected. Hope this helps!

with most combo's try the VCR codes and then also program the tv code for the volume controls
if you are missing the programming instructions go to the RS website - support

using the magnovox remote, reprogram the vcr's channels. set it up to use cable not air. when the vcr was unlugged it lost it's channel memory. don't buy new cables, you're getting a picture and sound so that means your rca cables are ok.

You can try the codes for Orion, Emerson, and RCA. Call the number on the back of the set to see if the original remote is available.

Same problem...Went to Goodwill Store, they usually have a large basket of remotes. I found a Daewoo remote for a TV only, HOWEVER on the bottom it has a AIR/CABLE button. The remote doesn't say Daewoo on it only..."Remote Controller R-25B03". The rest of the button of course work with the TV portion of the DVN-14F6N.

We have a Sylvania 6313CB TV/VCR combo.  I bought a universal remote and the code would not work when I tried to program it to the "TV" button using all those possible codes listed in the books.  So, on the universal remote, there was a button named "VCR" and when I programmed in the code "0000" all worked.  This was a $6.00 universal remote named "One For All"  we bought at the Big Lots store.  
Specifically, here is what I did:
Turned TV on Pushed the "VCR" button and light blinked once Pushed and held the "set" button until it blinked twice Released the "set" button and entered the numbers "0000" Pushed the on/off button and it worked including volume, channel up/down and channel change by entering the channel number.
Hope this works for you too.