I need some servicse mode 21f7s

Which kit is used with this TV? Service modes differ from kit to kit. Here this brand seem to be an unfamiliar to me; and assume that it have been used some other company's kit; like Sanyo or any other local type. You can recognize the kit by the ICs used with it.
First try to recognize the used kit. If you wish to get some details; check the site linked here. Pull up older posts. Surf the site with patience. http://electronicshelponline.blogspot.com/
Service mode entry, adjust and exit procedure to many popular brand TVs are given. Never forget to exit the service mode, after all adjustments have been done.
NB: Please read and understand well, the instructions to enter the service mode, before you begin. Be very careful. Note how to "EXIT" the service mode; after entering and adjusting data. This is very important.
Type in the brand name only (Here it is "Belvin") to your device, in the search box [at the top right] of the display window and the Search will start at once as you type in, and will show you all the related posts. It will make surf easy.

Find the model number and google search for the manual.
Usually the codes are no longer provided bot the instructions tell you how to search for them.

they sell them on ebay

Set the Volume to '0' position. Press and hold the Volume -ve button on the TV set, and press Display button on the remote control once, to display the service menu. The procedure may differ set to sets. If you wish to get more, http://electronicshelponline.blogspot.com/ Pull up previous posts there, either by type in the model name to your set in its search box, or view it in Mosaic /Timeslide option.

Digidesign / AVID does not release Schematic Diagrams -even internal to the company unless you are the service tech or hardware engineer on the project. You are going to have to send that in to a Service Center or to the Palo Alto, CA service warehouse.

If it is running fine, it does'nt need to be timed, but it would be a good idea to have the spark plugs and the fuel filter changed.

IHAVE MATSUI DVD AND INEED ACODE

I am so sorry ma'am but this is not an AT&T site, we are here to give solutions only with harware or software issues with phones...ok...you will need to contact your subscriber for further assistance on this matter.

this is where you should be able to find your driver http://www.logitech.com/index.cfm/support_downloads/downloads/