I suggest you go to Beijing Zhongguancun digital maintenance chain. It is close to the ideal building, where you specialize in digital camera maintenance and receive additional training. Master Jiao has good skills, takes one or two people every month, practices a lot, and can maintain independently after learning. I have contact information, area code 0 10 and telephone number 8267076. Ask Master Jiao to see if it is suitable for your own study.