I need the cod - Hitachi 51F510 51" Rear Projection HDTV-Ready Television

Hello
I don't know what code do you need. Your post is not clear. Anyway assumeing that you needs universal remote contol codes for your Hitachi, and posts this solution.
Three digit universal remote code for Hitachi are:
001/ 004/ 009/ 013/ 059/ 061/ 079/ 088/ 091/ 137/ 139/ 140/ 141/ 142/ 143/ 144/ 145/ 146/ 179/ 210
Four digit universal remote codes for Hitachi are:
0088 0059 0142 0060 0072 0004 0009 0091 0001 0012 0061 0137 0139 0141 0179 0227
Direct Code Entry

1. Press and hold the SETUP button until the red indicator stays on, then release the SETUP button.
2. Press and release the desired Mode button (TV, VCR, etc.). The red indicator blinks, then stays lit.
3. Enter the 4 digit code from the code tables. Note: after a valid code entry, the red indicator turns off. For an invalid code, the red indicator flashes.
4. With your device on, press CHANNEL UP. If the device responds, no further programming is required. Note: If some buttons do not operate your device, try one of the other codes for your brand.

1. Manually turn on the device (TV, VCR, etc.) to be controlled.
2. Press and hold the SETUP button until the red indicator stays on, then release the SETUP button.
3. Press and release the desired Mode button (TV, VCR, etc.). The red indicator blinks once, then stays on.
4. Press the CHANNEL UP button repeatedly (up to 300 times) until the device to be controlled changes channel. The red indicator blinks, then stays lit.
5. Press and release MUTE to install the code. The indicator light goes off.