canon ir/adv service mode change। *28*/*49*

hello everyone my self Govind Mishra from Lucknow my ? number 9918053366 copier related any query/problem call me canon ir/adv service mode change। *28*/*49* canon adv service mode# canon copier service # ir 5020# 5075# ERROR # error code # canon imege runner# 6075# 6275# advance # 8105#