Nikon JAA79551, Repair Manual

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INC
JAA79551-R.3690.A
- A38 ･ AF-S VR 70-300/4.5-5.6G -
Caution
：
If the MF ring is rotated while the lens scanning is driven, the pulse shows an abnormal value. Do
NOT touch the MF ring during operations.
During the lens driving, the above screen is displayed.
This inspection must be made at the following 5 lens positions with the focal length [both 70 mm (W)
and 300 mm (T)].
The number of overrun/underrun pulses must be within the standards after the lens back-and forth driving
5-motion ("5/5TIME (S)." in
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of the display).
Standard RATIO (1) is 40% or less for Df1~Df6.
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of the screen
[Occurrence ratio of 6-15 pulses]
RATIO (2) is 10% or less for Df1~Df6.
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of the screen
[Occurrence ratio of 11-15 pulses]
Occurrence of 16 or more pulses is zero for Df1~Df6
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of the screen
[Only one occurrence indicates defective.]
※ ※
"Df1~Df6" shows the lens driving amount.
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Lens inclination Position of index window
Horizontal Up, right and left
Front lens group 90° angle upward
Front lens group 90° angle downward
(Lens position in inspecting)