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Solve stuck focus of AF-S VR Zoom-Nikkor ED 70-200mm f2.8G IF

Введение

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.

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  1. Solve stuck focus of AF-S VR Zoom-Nikkor ED 70-200mm f2.8G IF, Solve stuck focus of AF-S VR Zoom-Nikkor ED 70-200mm f2.8G IF: шаг 1, изображение 1 из 1

    • The lens. Focusing mechanism traps in close-up end, worsens over time.

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  2. Solve stuck focus of AF-S VR Zoom-Nikkor ED 70-200mm f2.8G IF, Separate front and rear group: шаг 2, изображение 1 из 3 Solve stuck focus of AF-S VR Zoom-Nikkor ED 70-200mm f2.8G IF, Separate front and rear group: шаг 2, изображение 2 из 3 Solve stuck focus of AF-S VR Zoom-Nikkor ED 70-200mm f2.8G IF, Separate front and rear group: шаг 2, изображение 3 из 3

    • First, you better download the "AF-S VR Zoom-Nikkor ED 70-200mm f/2.8G IF REPAIR MANUAL". (The attatchment)

    • Remove Tripod mount (The one can be removed with only hands)

    • Remove tripod mount base by remove 4 screws.

    • short

    • long

    • Unscrew switch board and disconnect all 3 FPC's

    • Remove tripod ring, by removing 3 hidden screws. check the Repair Manual

    • Remove 11 screws and separate rear group. There is an empty hole.

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  3. Solve stuck focus of AF-S VR Zoom-Nikkor ED 70-200mm f2.8G IF, Remove 4th Lens Group: шаг 3, изображение 1 из 2 Solve stuck focus of AF-S VR Zoom-Nikkor ED 70-200mm f2.8G IF, Remove 4th Lens Group: шаг 3, изображение 2 из 2

    • Take the front group. remove zoom rubber ring.

    • Peel the tape, and keep if you don't have a replacement.

    • Remove 2 screws.

    • Remove 3 screws and remove "4th Lens Group"

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  5. Solve stuck focus of AF-S VR Zoom-Nikkor ED 70-200mm f2.8G IF, Remove Zoom Fixed Ring: шаг 4, изображение 1 из 3 Solve stuck focus of AF-S VR Zoom-Nikkor ED 70-200mm f2.8G IF, Remove Zoom Fixed Ring: шаг 4, изображение 2 из 3 Solve stuck focus of AF-S VR Zoom-Nikkor ED 70-200mm f2.8G IF, Remove Zoom Fixed Ring: шаг 4, изображение 3 из 3

    • Unscrew 3 outer screws and remove Aperture Blade Unit

    • Do NOT manipulate the Aperture calibration screw! (RED mark)

    • Do NOT manipulate the whatever calibration screw! (YELLOW mark)

    • Remove 8 black screws and lift "Zoom Fixed Ring" and "MF Ring"

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  6. Solve stuck focus of AF-S VR Zoom-Nikkor ED 70-200mm f2.8G IF, Reposition the PCB: шаг 5, изображение 1 из 3 Solve stuck focus of AF-S VR Zoom-Nikkor ED 70-200mm f2.8G IF, Reposition the PCB: шаг 5, изображение 2 из 3 Solve stuck focus of AF-S VR Zoom-Nikkor ED 70-200mm f2.8G IF, Reposition the PCB: шаг 5, изображение 3 из 3

    • 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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  7. Solve stuck focus of AF-S VR Zoom-Nikkor ED 70-200mm f2.8G IF: шаг 6, изображение 1 из 3 Solve stuck focus of AF-S VR Zoom-Nikkor ED 70-200mm f2.8G IF: шаг 6, изображение 2 из 3 Solve stuck focus of AF-S VR Zoom-Nikkor ED 70-200mm f2.8G IF: шаг 6, изображение 3 из 3

    • More detail. The infinity end is glued using some better glue(dark material), while the close end is NOT.

    • The fix is

    • Mark or remember the position BEFORE removing 2 screws and contact brush! but relax, this part is not extremely precise.

    • Lift the PCB. Cleanup double sided tape. Glue the PCB back firmly against the inner edge.

    • Use proper glue, like "high viscous super glue" or "2-part epoxy resin". Do NOT use low viscous glue, it will mess up and contaminate the contacts.

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    • Now put it back, following these instructions in reverse order.

    • Screw tighten torque list.

    • Internal M1.6 screws: 0.12N.m.

    • Tripod mount M2.0 screws: 0.2N.m.

    • 2 screws on switch panel: 0.06~0.08N.m (watch out the plastic is very fragile)

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Заключение

Be patient and Good Luck!!!

7 участников успешно повторили данное руководство.

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Terrance

Участник с: 11/17/09

6 359 Репутация

Автор 17 руководств

Значки: 22

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13 Комментариев

Does this fault affect manual focus also ?

Thanks

Arnold Livingston - Ответить

It does. And might be worse, because MF sometimes goes faster than AF, then stuck deeper…

Terrance -

Hi Terrance,

So is your lens good til now after this fix? By the way, what type of glue specifically did you use?

t2psalm - Ответить

Good as brand new :D. I used “super glue“ and learned the lesson. Luckily the mess is not very bad, cleaned that up and the great lens is happy again.

Terrance -

Will whis work even if my focus ring is stiff (but moves and “jumps”) AF works finw

philippscaglia - Ответить

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