Nikon AF-S Zoom-Nikkor ED 24-85mm f/3.5-4.5G IF Operating instructions

JAA78071-R.3583.A
作成承認印 配布許可印
REPAIR MANUAL
NIKON CORPORATION
Tokyo, Japan
Recycled paper
Printed in Japan May 2002
Copyright ｃ 2002 by Nikon Corporation.
All Rights Reserved.
TEMPORARY
AF-S Zoom-Nikkor ED 24-85mm f/3.5-4.5G IF

JAA78071-R.3583.A
- M1 ･AF-S 24-85/3.5-4.5G -
Type of lens
Focal length
Maximum aperture
Lens construction
Picture angle
Focal length scale
Distance information
Zoom control
Focusing
Shooting distance scale
Closest focus distance
Diaphragm
Aperture range
Exposure measurement
Attachment size
Dimensions
Weight
G-type AF Zoom- Nikkor lens having built-in CPU and Nikon bayonet mount
24mm-85mm
f/3.5-4.5
15 elements in 12 groups (1 aspherical lens and 1 ED lens elements)
84 ° -28 ° 30 ′ (71 ° 18 ′ -22 ° 54 ′ with IX 240 system cameras,
60 ° 54 ′ -18 ° 48 ′ with Nikon Digital Camera D1/D1H/D1X/D100)
24,35,50,70,85mm
Output to camera body
Manually via separate zoom ring
Nikon Internal Focusing (IF) system (utilizing an internal Silent Wave Motor);
manually via separate focus ring
Graduated in meters and feet from 0.38m (2ft.) to innity (∞)
0.38m (1.2ft.) at all zoom settings
Fully automatic
f/3.5 to f/22 (at 24mm), f/4.5 to f/29 (at 85mm)
Via full-aperture method with cameras having CPU interface system
67mm (P ＝0.75mm)
Approx. 73mm dia. ×72.5mm extension from the camera's lens mount ange
(min. length at 24mm focal length)
Approx.415g (14.6 oz)
SPECIFICATIONS

JAA78071-R.3583.A
- L1･ AF-S 24-85/3.5-4.5G -
RUBBER RING ＃35, SHEET ＃48
DISASSEMBLING/ASSEMBLING/ADJUSTMENT
１．DISASSEMBLING
1st AND 2nd LENS GROUP
＃ 35 ＃ 48
＃ 77
＃ 79
1st lens group unit
2nd lens group unit

JAA78071-R.3583.A
- L2･ AF-S 24-85/3.5-4.5G -
FILTER RING ＃25
＃96×3
＃ 25
ZOOM RING
＃ 61
●Remove the three screws #96 and then
remove the lter ring #25 as rotating in the
arrow mark direction.
①Remove the screw #61.

JAA78071-R.3583.A
- L3･ AF-S 24-85/3.5-4.5G -
REAR COVER RING
＃ 38
Zoom ring
②Remove the zoom ring.
Note：
The three convex sections on the inner
diameter of zoom ring are put into the
groove of #22.
When removing the zoom ring, rotate it
until the convex sections can be removed
from the groove and then remove it.
Convex section
＃ 22
Groove
＃ 105 × 2
＃ 107 × 3
Rear cover ring
Convex section
Convex section

JAA78071-R.3583.A
- L4･ AF-S 24-85/3.5-4.5G -
BAYONET MOUNT
＃98×3
＃ 116
＃ 78
INDEX RING, FOCUS RING
M/A selector switch
①Slide the M/A selector switch unit in
thearrow mark direction to be in the
condition as shown in the left picture.

JAA78071-R.3583.A
- L5･ AF-S 24-85/3.5-4.5G -
M/A selector switch
②Remove the index ring rst and then the
focus ring.
※As shown in the left picture, pass the
M/A selector switch unit through the
index ring.
Index ring
Focus ring
MAIN PCB
Zoom encoder FPC
Distance encoder FPC
MR sensor FPC
ＳＷＭ－ＦＰＣ
＃ 115
Main PCB
①Remove each FPC as shown in the left
from the connectors.
②Remove the screw #115.
③Remove the main PCB.

JAA78071-R.3583.A
- L6･ AF-S 24-85/3.5-4.5G -
SWM UNIT
＃96×3
B31
＃96×3
SWM unit

JAA78071-R.3583.A
- L7･ AF-S 24-85/3.5-4.5G -
2nd LENS GROUP HOUSING UNIT
＃84×3
＃86×3
＃85×3
2nd lens group housingunit
Note：Hereafter, the 5th and 4th lens groups have to be removed.
When the 5th and 4th lens groups have been removed, alignment must
be done after assembly.
If alignment is impossible in your service ofce, do not carry out further
disassembly works.
But it is possible to replace the zoom encoder brush and zoom key.

JAA78071-R.3583.A
- L8･ AF-S 24-85/3.5-4.5G -
4th AND 5th LENS GROUP
＃96×3
5th lens group
4th lens group
＃96×3
3rd LENS GROUP
3rd lens group

JAA78071-R.3583.A
- L9･ AF-S 24-85/3.5-4.5G -
APERTURE BLADE HOUSING UNIT
＃80×3
＃83×3
Aperture blade housingunit
ZOOM ENCODER BRUSH
＃ 74
＃ 75

JAA78071-R.3583.A
- L10 ･ AF-S 24-85/3.5-4.5G -
ZOOM KEY ＃59
＃ 59
＃ 62
＃ 60
B7 × 3
1st LENS GROUP SLIDING RING ＃51
＃81×3
＃ 51

JAA78071-R.3583.A
- L11 ･ AF-S 24-85/3.5-4.5G -
CAM RING ＃50
＃ 50

JAA78071-R.3583.A
- L12 ･ AF-S 24-85/3.5-4.5G -
２．ASSEMBLING/ADJUSTMENT
ZOOM ENCODER FPC
B18
＃ 24
Krazy glue
・While the arrow mark surface (as shown
in the left picture) is regarded as reference,
adhere the zoom encoder FPC (B18) to #24.
CAM RING GROUP
MZ-800S
●Lubrication places
Apply MZ-800S to 6 straight grooves of #24.
Apply I-40 to 3 cam grooves of #24.
Apply I-40 to 9 cam grooves and horizontal groove
of #50.
＃ 24
＃ 24
＃ 50
Horizontal groove
3 convex places on outer diameter
I-40
3 sliding places on outer diameter
I-40
MZ-800S

JAA78071-R.3583.A
- L13 ･ AF-S 24-85/3.5-4.5G -
1st LENS GROUP SLIDING RING ＃51
B7
Back washer (Thickness: 0.4mm)
○ ×
B7 × 3
＃81×3
＃ 51
×
（B7）
《Reference》
Tighten the screws #81, and B7 is inclined and so the
cam ring does not operate smoothly.
As shown below, set a back washer, etc. between B7
and the straight groove and then tighten the screws #81
to prevent B7 from being inclined.
Screw Lock
I-40
Lock END B
（B7）
I-40

JAA78071-R.3583.A
- L14 ･ AF-S 24-85/3.5-4.5G -
ZOOM KEY ＃59
＃ 59
＃ 62
＃ 60
Lock End B
ADJUSTMENT OF ZOOM ENCODER BRUSH POSITION
＃ 74
＃ 75
Screw Lock
＃ 74
①Set the zoom encoder brush #74. Tighten the screw #75
temporarily.
②Set the cam ring to the W side as shown in the above picture.
③Adjust the brush position so that the brush end may be as
shown in the right gure.
④Tighten the screw #75 securely and x it with the screw lock.
Lock End B

JAA78071-R.3583.A
- L15 ･ AF-S 24-85/3.5-4.5G -
APERTURE BLADE HOUSING UNIT
＃80×3
＃83×3
Aperture blade housingunit
Aperture lever
Convex section
Check：When mounting the aperture
blade chamber unit, the aperture lever
must be positioned as shown in the left
picture.

JAA78071-R.3583.A
- L16 ･ AF-S 24-85/3.5-4.5G -
2nd LENS GROUP HOUSING UNIT
＃84×3
＃86×3
＃85×3
2nd lens group housingunit
＃ 52
＃ 56
9 convex places on outer diameter
G92KA
●Apply G92KA to the 3 cam grooves of #52.

JAA78071-R.3583.A
- L17 ･ AF-S 24-85/3.5-4.5G -
MR HEAD
＃ 541 × 2
＃ 534
＃ 533
＃ 536 ＃ 543
MR head
①Set the MR head to be parallel with the
magnetic tape.
②Adhere the MR sensor FPC to the inside
of the SWM unit.
Note：Adhere the MR sensor FPC not to be
sharply loosened.
Magnetic tape
MR sensor FPC
SWM unit
INSPECTION AND ADJUSTMENT FOR THE WAVEFORM OUTPUT FROM MR ENCODER
●In case of disassembling or replacing the MR head, be sure to conduct adjustment.
１．Equipment and tools to be required
・Single output rated voltage power supply: 1 unit With 5.0V and 100mA, applicable to the self-made tool
・Oscilloscope: 1 unit
・Self-made tool: 1 unit
Note：自In case of any trouble in continuity between the self-made tool and the contacts of relay FPC, there may
be dust, corrosion or oxidation on the contact surface of relay FPC. Be sure to polish the contact surface prior to
getting connected with the self-made tool.
２．Preparation for the lens to be measured
・Set the SWM unit on which the MR head has already been set and the MF ring into the cam ring unit.
Then, connect to the measuring devices. (Refer to the next page.)

JAA78071-R.3583.A
- L18 ･ AF-S 24-85/3.5-4.5G -
＃96×3
Focus ring
Oscilloscope
（2ch）
Power supply
Set values
５. ０Ｖ
１００ｍＡ
（＋）
（GND）
・Connection diagram
Self-made tool
SWM unit
Cam ring assembly
Oscilloscope(2ch)
Oscilloscope(1ch)
Power supply(+)
Power supply(-)