Canon Optura 20 Not Working Properly

Hi, I am Joemon,From India.Basicaly I am a camcorder technician,One my camcorder is working not proerly.Its Over Exposure.Out Door Picture not working Properly.But indoor its working fine.I am alredy changed its IG Meter Unit.(SHUTTER UNIT)But tiil the same Problem.Please anybody can help me? Regards JOMON

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