Difficulty

Moderate

Steps

7

Time Required

                          1 - 4 hours

Sections

1

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

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Introduction

What you need

Step 1

              Solve stuck focus of AF-S VR Zoom-Nikkor ED 70-200mm f2.8G IF
  • The lens. Focusing mechanism traps in close-up end, worsens over time.

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

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Step 2

              Separate front and rear group
  • 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.

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.

Step 3

              Remove 4th Lens Group
  • 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”

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”

Step 4

              Remove Zoom Fixed Ring
  • 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”

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”

Step 5

              Reposition the PCB
  • 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.

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.

Step 6

  • 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.

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.

Step 7

  • 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)

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)

Be patient and Good Luck!!!

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                                                                                      6 other people completed this guide.

Attached Documents

  • 修理指針表紙.indd
  • PDF - 11.27 mb
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修理指針表紙.indd

PDF - 11.27 mb

Author

                                      with 1 other contributor 


                    Terrance

Member since: 11/17/2009

6,193 Reputation

                                      17 Guides authored                  



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Arnold Livingston - Jul 20, 2018

Reply

Does this fault affect manual focus also ?

Thanks

Terrance - Oct 10, 2018

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

t2psalm - Oct 11, 2018

Reply

Hi Terrance,

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

Terrance - Oct 11, 2018

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.

philippscaglia - Mar 18, 2019

Reply

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