Nikkor JAA79051 Operating instructions

JAA79051-R.3624.A
作成承認印 配布許可印
REPAIR MANUAL
NIKON CORPORATION
Tokyo, Japan
Recycled paper
Printed in Japan February 2004
Copyright ｃ 2004 by Nikon Corporation.
All Rights Reserved.
AF-S DX Zoom-Nikkor
ED 18-70mm f/3.5-4.5G IF
JAA79051
INC

JAA79051-R.3624.A
- M1 ･AF-S DX18-70/3.5-4.5G -
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 DX Zoom- Nikkor lens having built-in CPU and Nikon bayonet mount
18mm-70mm
f/3.5-4.5
15 elements in 13 groups (1 aspherical lens and 3 ED lens elements)
76 ° -22 ° 50 ′ with Nikon Digital Camera D1/D1H/D1X/D2H/D100)
18,24,35,50,70mm
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 18mm), f/4.5 to f/29 (at 70mm)
Via full-aperture method with cameras having CPU interface system
67mm (P ＝0.75mm)
Approx. 73mm dia. ×75.5mm extension from the camera's lens mount ange
(min. length at 18mm focal length)
Approx.420g (14.8 oz)
SPECIFICATIONS
This lens can be used for Nikon digital SLR camera only.
INC

JAA79051-R.3624.A
- L1･ AF-S DX18-70/3.5-4.5G -
RUBBER RING, SHEET
DISASSEMBLY/ASSEMBLY/ADJUSTMENT
1. DISASSEMBLY
1st AND 2nd LENS GROUP
＃ 35 ＃ 48
＃ 77
＃ 79
1st lens group unit
2nd lens group unit
INC

JAA79051-R.3624.A
- L2･ AF-S DX18-70/3.5-4.5G -
FILTER RING
＃96×3
＃ 25
ZOOM RING
＃ 61
●Remove 3 screws (#96) and remove the lter
ring (#25) while rotating it in the arrow
direction.
①Remove the screw (#61).
INC

JAA79051-R.3624.A
- L3･ AF-S DX18-70/3.5-4.5G -
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
INC

JAA79051-R.3624.A
- L4･ AF-S DX18-70/3.5-4.5G -
BAYONET MOUNT
＃98×3
＃ 116
＃ 78
INDEX RING, FOCUS RING
M/A selector switch
①Slide the M/A selector switch unit in the
arrow direction as shown in the left pic-
ture.
①Remove 3 screws (#98) and the screw (#116),
and detach the bayonet mount.
②Remove the washers (#78).
INC

JAA79051-R.3624.A
- L5･ AF-S DX18-70/3.5-4.5G -
M/A selector switch
②Remove the index ring rst 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 from the connectors as
shown in the left .
②Remove the screw (#115).
③Remove the main PCB.
＃ 97
INC

JAA79051-R.3624.A
- L6･ AF-S DX18-70/3.5-4.5G -
SWM UNIT
＃96×3
＃96×3
SWM unit
＃ 29
①Remove 3 screws (#96), and detach the Rear
xed ring (#29).
②Remove 3 screws (#96), and detach the SWM
unit.
INC

JAA79051-R.3624.A
- L7･ AF-S DX18-70/3.5-4.5G -
2nd LENS GROUP HOUSING UNIT
＃84×3
＃86×3
＃85×3
2nd lens group housing unit
Note：
After the above, the 5th and 4th lens groups should be removed.
When the 5th and 4th lens groups are removed, lens alignment should be
performed after assembly.
If the alignment is impossible in the service ofce, do not carry out
further disassembly work, but the zoom encoder brush and zoom key can
be replaced.
②Remove 3 screws (#84), 3 springs (#86)and 3
rollers #(85).
INC

JAA79051-R.3624.A
- L8･ AF-S DX18-70/3.5-4.5G -
4th AND 5th LENS GROUP
＃96×3
5th lens group
4th lens group
＃96×3
3rd LENS GROUP
3rd lens group
①Remove 3 screws (#96) and detach the 5th lens
group.
②Remove 3 screws (#96) and detach the 4th lens
group.
INC

JAA79051-R.3624.A
- L9･ AF-S DX18-70/3.5-4.5G -
APERTURE BLADE HOUSING UNIT
＃80×3
＃83×3
Aperture blade housing unit
ZOOM ENCODER BRUSH
＃ 74
＃ 75
①Remove 3 screws (#80), 3 rollers (#83), and
detach the Aperture blade housingunit.
①Remove 3 screws (#75) and detach the zoom
encoder brush (#74).
INC

JAA79051-R.3624.A
- L10 ･ AF-S DX18-70/3.5-4.5G -
ZOOM KEY
＃ 59
＃ 62
＃ 60
B7 × 3
1st LENS GROUP SLIDING RING
＃81×3
＃ 51
①Remove the screws (#60 and#62) and detach
the zoom key (#59).
①Remove 3 screws (#51), the three zoom keys
(B7) and detach the 1st lens group sliding ring
(#51).
② Remove the 1st sliding ring (#51).
INC

JAA79051-R.3624.A
- L11 ･ AF-S DX18-70/3.5-4.5G -
CAM RING
＃ 50
INC

JAA79051-R.3624.A
- L12 ･ AF-S DX18-70/3.5-4.5G -
2. ASSEMBLY/ADJUSTMENT
ZOOM ENCODER FPC
＃ 1002
＃ 24
Adhesive: Aron alpha
・By aligning the edges as shown by the left
arrows,adhere the zoom encoder FPC
(#1002) to #24.
CAM RING GROUP
MZ-800S
●Grease application:
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
Grease:I-40
3 sliding places on outer diameter
Grease:I-40
Grease: MZ-800S
INC

JAA79051-R.3624.A
- L13 ･ AF-S DX18-70/3.5-4.5G -
1st LENS GROUP SLIDING RING
B7
Back washer (Thickness: 0.4mm)
○ ×
B7 × 3
＃81×3
＃ 51
×
（B7）
《Reference》
Tighting the screws (#81) causes inclination of B7, and
it becomes heavy in operating the cam ring.
Therefore, as shown below, put a back washer, etc. in
between B7 and the straight groove and tighten the
screws (#81). This can prevent B7 from being inclined.
Adhesive: Screw Lock
Grease: I-40
Adhesive: Lock END B
（B7）
Grease: I-40
INC

JAA79051-R.3624.A
- L14 ･ AF-S DX18-70/3.5-4.5G -
ZOOM KEY
＃ 59
＃ 62
＃ 60
Adhesive:
Lock End B
ADJUSTMENT OF ZOOM ENCODER BRUSH POSITION
＃ 74
＃ 75
Adhesive: 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 edge of the brush are
positioned as shown right.
④Tighten the screw (#75) securely and x it with the screw lock.
Adhesive: Lock End B
①Attach the zoom key #59 with the screws
(#60 and #62).
INC

JAA79051-R.3624.A
- L15 ･ AF-S DX18-70/3.5-4.5G -
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 left.
①Assemble the zoom Aperture blade housing
unit with 3 screws (#80) and 3 rollers (#83).
INC

JAA79051-R.3624.A
- L16 ･ AF-S DX18-70/3.5-4.5G -
2nd LENS GROUP HOUSING UNIT
＃84×3
＃86×3
＃85×3
2nd lens group housing unit
＃ 52
＃ 56
Apply to 2 convexties on outer diameter
Grease: G92KA
●Apply G92KA to the 3 cam grooves of #52.
①Assemble the 2nd lens group with 3 rollers
(#85), 3 springs #86 and 3 screws (#84).
INC

JAA79051-R.3624.A
- L17 ･ AF-S DX18-70/3.5-4.5G -
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
largely slack.
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 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：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 measuring lens
・Assemble the SWM unit, on which the MR head is already attached, and the MF ring into the cam ring unit.
Then, connect to the measuring devices. (Refer to the next page.)
INC

JAA79051-R.3624.A
- L18 ･ AF-S DX18-70/3.5-4.5G -
＃96×3
Focus ring
Oscilloscope
（2ch）
Power supply
Set values
5.0V
100mA
（＋）
（GND）
・Connection diagram
Self-made tool
SWM unit
Cam ring unit
Oscilloscope(2ch)
Oscilloscope(1ch)
Power supply(+)
Power supply(-)
INC