I need the codes for the yamaha rav245 remote control

Joseph, codes 0081,0082,0176, 0186, 1176, the attached manual may have more codes.
Yamaha rx-v2500 receiver, try the auto programming feature on your remote to set up universal remote. It is possible the remote may not support your equipment and you will have to replace with compatible remote. Check the attached links,instruction and guides, Good luck
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RC Yamaha RX V2500 Receiver and DVR PVR 5 HELP
Codes for Universal Remotes Codes for Universal Remotes How to Program Universal Remote
Yamaha RX V2500 Owner Manual Setting Remote Control Codes

http://www.replacementremotes.com/YAMAHA-Manuals/Buy-Download-RXV861-MANUAL-OPERATING-MANUAL-Operating-Manual.html
Try the above link to download the manual.
Gopakumar Gopalan Google

Codes to check with Yamaha Audio devices are: 028,026,022,025,024. Try these codes. If you wish to get more details, check the sites linked here. Set-up code list, and Set-up procedure to many popular brand remote controls are given. http://electrohelponline.blogspot.com/ http://remotesearch.blogspot.com/ Selecting the view option, either to Mosaic / Flip card, can be selected by the drop-down list, by the top left of the display window, will make surf easy.
Irrespective of Brand of the remote control, you should look for the codes to Yamaha. Brand name of the remote control isn't a matter. Check whether this set will receive a 3-digit code, 4-digit code or 5-digit code.

Since Insignia and LG share compatible codes for digital-to-analog converters, review your remote control's manual for LG VCR codes as they should work to control the Insignia converter.

http://www2.yamaha.co.jp/manual/pdf/av/english/re/RX-V461_U_en.pdf
this web page has complete manuel for your yamaha RX-V461 home theater system they list code for samsung tv as 30739
press dtv button
press code set button
enter five diget code any questions refer to online manuel good luck ron

On most universal remote control, you will find the procedure to enter the builder code OR a procedure to pass through all the code of the remote, one by one and pass to the other TILL you find the right one.

Does anyone know where to find a user manual or instructions to use the Yamaha RAV250 remote control?

(I have the RX-V659). Because the Yamaha remote has TWO SEPARATE buttons - power ON and power OFF (standby). This problem can't be fixed. There's a code to choose power ON and another code for power OFF. But one button can't be two buttons. Bad engineering\ design by Yamaha in my opinion

i have sony receiver codes 31759, 30158, 31758,
or 4 digit codes 0158 and 1758

Try reseting the Yamaha-Shut the power off, and while holding down presets 1,2 and 3 press power on.