Today I went to Canon service centre at Mangga Dua Jakarta.
In case you find difficulties to find the building, here is the guidance.
Go to WTC Mangga Dua. From Pademangan TransJakarta shelter, you will find below bridge.
Go behind the WTC building through that bridge and you will find ruko. Go to corner and you will find below building.
Tadaa! It opens in Saturday also for half day only.