TV problem 46GW948 GE 48? Thomson Guide Plus...

Question

On our TV, 46GW948 GE 48” Thomson Guide Plus GemStar.
The picture needs to be lined back up. It is giving a double image. The cross hairs need to be adjusted. There is a red outline around each image. We cannot find our manual and this happened to our parent's tv a few years ago. The repair man adjusted it with a set of cross hairs. How do we get to those cross hairs? HELP! We cannot afford to buy a new tv right now. Thank you.