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Topic: sony problem
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Sascha F. Roll
Expert Film Handler
Posts: 140
From: Berlin, Berlin / Germany
Registered: Sep 2015
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posted 05-19-2019 02:53 PM
Though I am a bit fed up of giving my knowledge out for free and companies who clearly don't have a clue what they are doing get the money... here are my 2 Cents:
- Your projector suffers from severe Shading. First of all, get the following DCP from Sony: "PRDTESTB1V1_TST-1_C_30_4K_20170814_IOP_OV" and take pictures of the results, then send it to your qualified Sony technician.
- What you probably need: Complete cleaning of the "Optical Block" and surrounding filters, glass surfaces ect. - Followed by Adjustment of the "Optical Compensator" (e.g. "Black Level uniformity") - Perform PCAB-G (Gamma) - Perform PCAB-U (Uniformity) - Perfom CSC (Color Space Converter)
After all those steps were done properly you should have a very, very good and uniform picture again. Those steps above usually take between 6 hours or up to 8 hours, depending on the state of your projector.
Note: There have been quite some updates in the last year or so. (Patches for lower target temperatures for the Blue Panel for example - there is also a "replacement kit" consisting of a new, more powerful fan for the blue panel and a small board that needs to be replaced.) Also you should find out WHY your picture looks that aweful - how lang has the machine been installed? Operating Hours? Ambient temperature? Dirt? Your picture really looks aweful, I've seen a LOT of Sonys (and performed Maintenance on them) and yours seems to be quite unique.
PS: The above Maintenance steps should be perfomed AT LEAST anually, if you're putting lots of hours on your unit (>2800 p.a. or so) better twice a year. Sonys are great machines, very reliable, put out great picture BUT they need more love than DLPs. It's really not that bad. If you have a good tech performing the maintenance anually it also takes less than 6 hours because the projector should be in a better state in the first place. Also: DO NOT USE the air filters that come with the machine per default, I have not yet found one location where they were suitable. At least german distributors are aware of that problem and provide "better" filters for "normal booth environments".
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