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Topic: Lens issue on Barco 12c
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Gavin Lewarne
Master Film Handler
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Posts: 278
From: Plymouth, UK
Registered: Aug 2009
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posted 11-09-2015 05:58 AM
When our site was being serviced last Monday, our engineer noticed that when the motorised lens does any sort of zoom, it will come to its designated position and then "pulse / hunt" on the screen for a few seconds afterwards, ie, rapidly getting a bit smaller and then a bit bigger until it settles in the correct position. It does this for about 3 seconds.
I have been watching this very carefully over the last week and it does it every time there is any sort of lens shift or zoom movement.
As a VPF site, I reported it to DcineX and included a copy of the projector logs, which show no sign of any lens issue as far as the projector is concerned.
DcineX have come back to me and asked if I can swap the lens with a different projector, which is impossible as we are a single screen. While I deal with the run-around they are giving me, I was wondering if anyone has seen this before and what the likely culprit might be.
Lens: Fujinon 1.95 - 3.2 Projector: DP2k-12c Projector Firmware - 1.13.190
The projection room and projector are kept impeccably clean, I check lens and screen alignments weekly, the lens was removed, contacts checked, and rehomed during the service which made no difference.
We also replaced a SMPS fan which necessitated the removal of the front cover, so we took the opportunity to inspect the lens holder - no obvious damage and everything was secure. Our lens settings are well within the shift boundaries so it isn't a case of it being "close to maximum" in any particular direction.
The projector has not been moved for months, no firmware changes, it just spontaneously started doing it.
cheers
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