The code for a JVC TV is 0053 (non-combination TV). To program the remote, turn on the tv manually. Then press the TV button once. Then press and hold Set until the LED blinks twice. Then release Set. Aim the remote at the TV and enter the four digit code. The LED should blink twice again. Press the power button on the remote. The TV should turn off. Turn it back on and check if the remote does the other functions that it should for the TV.
There is a manual code search option. Press TV once, then press and hold Set until the LED blinks twice. Release Set and enter 9 - 9 - 1 . Then aim the remote at the TV and alternate between pressing Power and TV. When the TV turns off, press Set to save the code. Turn the TV back on and check if the remote performs other functions. If not, repeat the above steps until another code turns off the TV.
The manuals for All-for-One Remotes are available here: http://www.oneforall.com/support/manual
. Choose universal remote control in the top drop down and then the URC-4220 in the second.
Please note that universal remotes only have codes for devices released 6 months of more before the remote was programmed. If your TV is newer than your TV, then you may need a newer remote.
I hope this helps.