简介
It is a very common issue the AF-S VR Zoom-Nikkor ED 70-200mm f2.8G IF focus ring stuck at close end. This will show Ifixers how to fix this.
你所需要的
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The lens. Focusing mechanism traps in close-up end, worsens over time.
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First, you better download the "AF-S VR Zoom-Nikkor ED 70-200mm f/2.8G IF REPAIR MANUAL". (The attatchment)
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Remove Tripod mount (The one can be removed with only hands)
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Remove tripod mount base by remove 4 screws.
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short
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long
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Unscrew switch board and disconnect all 3 FPC's
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Remove tripod ring, by removing 3 hidden screws. check the Repair Manual
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Remove 11 screws and separate rear group. There is an empty hole.
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Take the front group. remove zoom rubber ring.
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Peel the tape, and keep if you don't have a replacement.
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Remove 2 screws.
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Remove 3 screws and remove "4th Lens Group"
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Unscrew 3 outer screws and remove Aperture Blade Unit
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Remove 8 black screws and lift "Zoom Fixed Ring" and "MF Ring"
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Here is the ISSUE. internal focus ring has contact with Distance readout PCB. The PCB is mounted by double sided tape. This is a design flaw. double sided tape drifts over time, and let the PCB slip out.
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More detail. The infinity end is glued using some better glue(dark material), while the close end is NOT.
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The fix is
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Mark or remember the position BEFORE removing 2 screws and contact brush! but relax, this part is not extremely precise.
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Lift the PCB. Cleanup double sided tape. Glue the PCB back firmly against the inner edge.
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Be patient and Good Luck!!!
Be patient and Good Luck!!!
7等其他人完成本指南。
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13条评论
Does this fault affect manual focus also ?
Thanks
It does. And might be worse, because MF sometimes goes faster than AF, then stuck deeper…
Terrance -
Will whis work even if my focus ring is stiff (but moves and “jumps”) AF works finw