Nikon ED 12-24 Repair manual

JAA78451-R.3596.A

作成承認印

配布許可印

REPAIR MANUAL

NIKON CORPORATION

Tokyo, Japan

Recycled paper

Printed in Japan March 2003

AF-S DXZoom-Nikkor ED 12-24mm f/4G IF

INC

JAA78451-R.3596.A

- M1

･ AF-S DX12-24/4G

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 F bayonet mount

12mm - 24mm (18 - 36 mm in 35 mm format)

f/4

11 elements in 7 groups (3 aspherical lens and 2 ED lens elements)

99° - 61° (with Nikon Digital Camera D1/D1H/D1X/D100)

12,15,18,20,24mm

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 0.3m (1ft.) to innity (∞)

0.3m (1ft.) at all zoom settings

Fully automatic

f/4-22 at all zoom settings

Via full-aperture method with cameras having CPU interface system

77mm (P=0.75mm)

Approx. 82.5mm dia. ×90mm extension from the camera's lens mount ange

Approx.485g

SPECIFICATIONS

This lens can be used for Nikon digital SLR camera only.

INC

JAA78451-R.3596.A

- L1･ AF-S DX12-24/4G -

Disassembly

1ST LENS GROUP

#101

FILTER RING

#103

#35

#79

#104×4

・

Remove the rubber ring (#35).

・

Remove the blindfolding-cover (#103).

・

Unscrew #79.

・

Take out 4 screws (#104).

・

Remove the lter ring.

Filter ring

INC

JAA78451-R.3596.A

- L2･ AF-S DX12-24/4G -

REAR COVER RING

#64×2

#66×3

ZOOM RING

#87

#66

・

Unscrew #87.

・

Unscrew #66.

・

Remove the encoder brush (B4).

・

Remove the zoom ring.

Note

：

The convex 3 parts of the zoom ring are grooved in #22. So remove the zoom ring by turning it to the position where the convex parts detach from the groove.

Rear cover ring

Zoom ring

Groove

Convexity

#22

#127

INC

JAA78451-R.3596.A

- L3･ AF-S DX12-24/4G -

BAYONET

#100

#109×3

#110

INDEX RING, FOCUS RING

Index ring

Focus ring

M/A change-over

・

Detach the M/A change-over SW from the index ring

by sliding it as shown in Fig. 1.

・

Remove the index ring.

・

Remove the focus ring.

Note

：

Pass the M/A change-over SW through the hole of

the index ring as shown in Fig. 2.

Fig. 1.

Index ring

Fig. 2.

INC

JAA78451-R.3596.A

- L4･ AF-S DX12-24/4G -

MAIN PCB

Distance encoder FPC

Main PCB

Zoom encoder FPC

SWM－FPC

MR sensor FPC

・

Remove the FPCs (positioned at 4 parts)

from the connecter.

・

Unscrew #89.

・

Remove the main PCB.

SWM UNIT

#89

#90×3

#29

#90×3

SWM unit

INC

JAA78451-R.3596.A

- L5･ AF-S DX12-24/4G -

#86

#77

#72

#78 × 2

#98 × 2

#97 × 2

#84 × 2

#72 × 2

CAM RING UNIT

INC

JAA78451-R.3596.A

- L6･ AF-S DX12-24/4G -

・

Take out the cam ring by turning the

1st sliding ring in the direction indicated by the arrow.

・

Detach the 2nd and 3rd units from

the cam ring.

1st sliding ring

Cam ring

Can ring

2nd and 3rd units

1st sliding ring

#96×3

#135×3

#95×3

INC

JAA78451-R.3596.A

- L7･ AF-S DX12-24/4G -

2ND LENS GROUP

#84×2

#72×2

2nd lens group

3RD LENS GROUP

3rd lens group

Aperture blade housing

#68×3

Note

：

If the 3rd lens group is removed, the shaft alignment is necessary

after assembling.

If the shaft alignment is impossible in your service ofces, do not

remove the 3rd lens group.

INC

JAA78451-R.3596.A

- L8･ AF-S DX12-24/4G -

Assembly

3RD LENS GROUP

3rd lens group

Aperture blade housing

#68 × 3

APERTURE BLADE HOUSING UNIT

Aperture blade housing unit

B5 × 7

#56

#33

#52

#59 × 2

#58

#60

#59 × 2

#80 × 2

#58

#60

#80

#56

#52

#33

#59

INC

JAA78451-R.3596.A

- L9･ AF-S DX12-24/4G -

2ND LENS GROUP

#84×2

#72×2

2nd lens group

・

Apply the grease (GE-8) to 3

parts of the cam groove and the all-round of #34.

1st sliding ring

#96×3

#135×3

#95×3

1ST SLIDING RING

・

Apply the grease (GE-8) to 5 parts of

the cam groove and across stepped parts.

・

Assemble the 1st sliding ring at the

below position.

LIMIT PLATE

#69×2

Limit plate

1st sliding ring

Cam ring

#34

Grease: GE-8

Grease: MZ-800S

INC

JAA78451-R.3596.A

- L10 ･ AF-S DX12-24/4G -

ZOOM ENCODER FPC

Attach the FPC along the groove.

Align the end of FPC in this position.

Do not let the FPC run off downwards.

CAM RING UNIT

Cam ring

2nd and 3rd group units

・

Insert the 2nd and 3rd group units

into the cam ring in the position as shown in the left.

・

Insert the cam ring by aligning it with the 3 guide rollers and 3 notches of #51.

Notch

#51

Guide roller

Cam ring

・

Apply the grease (GE-8) to the cam grooves (3 transversal grooves and 2 longitudinal grooves.).

・

Apply the grease (GE-8) to 3 inside

cam grooves.

Inside cam groove

Attach with Super glue

INC

JAA78451-R.3596.A

- L11 ･ AF-S DX12-24/4G -

・

Turn the 1st sliding ring in the direction indicated by the arrow.

1st sliding ring

#86

#77

#72

#78×2

Make sure that the limit plate is entered in the notches of the 2nd and 3rd group units.

#98×2

#97×2

#84×2

#72×2

・

Apply the grease (MZ-800S) to

the 1 longitudinal groove and 3 transversal grooves of #86.

INC

JAA78451-R.3596.A

- L12 ･ AF-S DX12-24/4G -

POSITION ADJUSTMENT OF LIMIT PLATE

Limit plate

#69

#29

#90×3

#109×3

Bayonet

・

Fix the limit plate in the center.

・

As shown in Fig. 1., assemble #29 and the

bayonet. The aperture lever (#55) is put into A of Fig.

#55

Fig. 1.

Ａ

Fig. 2.

・

Turn the zoom to TELE side.

(to the position where the 2nd and 3rd lens units are pushed downward.)

・

Move the aperture lever slowly in the direction indicated

by the arrow, and make sure of being the full aperture

when the aperture blades stop. Make adjustments by changing the position of attaching the limit plate.

・

After adjusting, apply the Screw Lock to #69.

・

Remove #29 and the bayonet.

Aperture lever

2nd and 3rd group units

INC

JAA78451-R.3596.A

- L13 ･ AF-S DX12-24/4G -

SWM unit

#541 × 2

#534

#533

#543

#536

・

Attach the

ＭＲ

head so that it is

aligned parallel to the magnetic tape.

・

Attach the

ＭＲ

sensor FPC so that it goes alongside the inside groove of the SWM unit.

INSPECTION AND ADJUSTMENT FOR THE WAVEFORM OUTPUT FROM MR ENCODER

●In case of disassembling or replacing the MR head, be sure to make adjustments.

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：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 connect to the self-made tool.

2. Preparation for the measuring lens 　　・Set the SWM unit on which the MR head is already set, the MF ring, the rear xing tube, and

the index ring into the cam ring unit. Then connect to the measuring devices. (Refer to the next page.)

Note: When make checks and adjustments, put a cloth under the lens to avoid any damages to the

rear lens.

Magnetic tape

MR sensor FPC

MR head

MR HEAD

INC

JAA78451-R.3596.A

- L14 ･ AF-S DX12-24/4G -

#90×3

Rear xing

tube

#90×3

SWM unit

Insert the focus connection key into the groove of #86.

#86

Focus connection key

Index ring

MF ring

Pass this FPC through the

hole of the index ring.

INC

JAA78451-R.3596.A

- L15 ･ AF-S DX12-24/4G -

・

Connections

(GND)

( ＋ )

C H 1 = 2 0 m V C H 2 = 2 0 m V 5 m s / d i v AC 10 : 1 A C 10 : 1

NO RM 20 0K S/ s

● Oscilloscope setting

V/Div (ch1) :

２０ｍＶ

V/Div (ch2) :

２０ｍＶ

Coupling :

ＡＣ

Time/Div :

５ｍ

Sec

Trigger Mode :

ＮＯＲＭＡＬ

Trigger Coupling :

ＡＣ

Trigger Source :

ＣＨ１

Trigger Position :

＋４

div

Trigger Type :

ＥＤＧＥ

Trigger Level :

０Ｖ

INPUT (ch1) :

ＡＣ

INPUT (ch2) :

ＡＣ

Standard：The amplitude of every pulse/waveform should be 50mV or more.

Note：Check the waveform by letting the focus ring to travel from the innity-end position to

the near distance end position and vice versa.

・How to conduct inspection and adjustment

　①

Make sure that the current and voltage of the connected rated voltage power supply are set values.

If they meet the set values, turn on the power.

　② Set the oscilloscope and drive the focus ring by hand.

Note：Since the shape of waveform varies according to the driving speed of focus ring, particularly and properly set

Time/Div.

　③

In case of detecting any wider waveform noise, use the lter function.

How to set the ler function in the employment case of Yokogawa-manufactured DL1540

　　１．Press the lter button. 　　２．Select "Smooth" in the menu on the PC screen.

Oscilloscope

(2ch)

Oscilloscope

(1ch)

Power supply

(+)

Power supply

(-)

Self-made tool

Oscilloscope

（2ch）

Set values

５. ０Ｖ１００ｍＡ

Self-made tool

Power supply

INC

JAA78451-R.3596.A

- L16 ･ AF-S DX12-24/4G -

　④ In the case of smaller amplitude, for adjustment, loosen

the two screws #541 and then shift the MR head position as shown in the right gure.

Note

：During adjustment, prevent the magnetic tape and MR

head from touching the magnetized driver bit, or the magnetic data may be damaged.

　● In case of a presence of partial drop in the amplitude between the innity and the near distance, the magnetic data

in magnetic tape may be damaged. Then, replace the magnetic tape and adjust it again.

　《Reference》

　● In case the amplitude of either CH1 or CH2 seems smaller, one of the two screws #541 may be loosened.

Then, check the screws. In case the screws are fully tightened, the MR head may be troubled. Then, be sure to replace the MR head unit B15 and adjust it again.

　⑦ Turn off the rated voltage power supply and remove the SWM unit. Ｐ

＃ 541 × 2

MR head

Magnetic tape

C H 1 = 2 0 m V C H 2 = 2 0 m V 5 m s / d i v AC 10 : 1 A C 10 : 1

NO RM 20 0K S/ s

C H 1 = 2 0 m V C H 2 = 2 0 m V 5 m s / d i v AC 10 : 1 A C 10 : 1

NO RM 20 0K S/ s

INC

JAA78451-R.3596.A

- L17 ･ AF-S DX12-24/4G -

SWM UNIT

#90×3

#29

#90×3

SWM unit

#88

#22

#131×4

・

Attach #88 to #22, and apply the oil barrier to the overall #88.

・

Build #22 in the SWM unit.

・

Tighten 4 screws (#131

）

#22

SWM

Insert the focus

connecting key into

the groove of #86.

#86

Focus connecting key

Pass the circled FPC through

the inside of #29.

INC

JAA78451-R.3596.A

- L18 ･ AF-S DX12-24/4G -

MAIN PCB

Distance encoder FPC

Main PCB

Zoom encoder FPC

SWM－FPC

MR sensor FPC

・

Attach the main PCB.

・

Screw #89.

・

Connect the FPC (at 4 parts) to the

connector.

#89

Index ring

M/A change-over

INDEX RING, FOCUS RING

Focus ring

#75

・

Attach #75 to the focus ring, and apply the oil barrier

to the overall #75.

・

Assemble the focus ring by aligning the inside notches

(at 3 parts) and the projections of SWM (at 3 parts).

・

Assemble the index ring by passing the M/A change-

over SW unit through the hole of the index ring.

Projection

On the sliding surface with focus

ring.

Grease: MZ-800S

INC

JAA78451-R.3596.A

- L19 ･ AF-S DX12-24/4G -

M/A change-over SW

Index ring

・

Slide the M/A change-over SW and

assemble into the index ring.

BAYONET

#100

#109×3

#110

・

Put the aperture lever

(

#55

）

in A

of the above.

Ａ

#55

J18004-1

POSITION ADJUSTMENT OF APERTURE LEVER

Aperture lever

#93×2

・

Turn the zoom to the TELE side.

（

to the position where the 2nd and 3rd

lens units are pushed downward.

）

・

Attach the tool (J18004-1) and make

sure of the aperture diameter.

Standard: Full aperture

・

In case it is out of standard, adjust the

position of the aperture lever by loos

ening 2 screws (#93).

・

After adjusting, x the 2 screws (#93)

with Screw Lock.

INC

JAA78451-R.3596.A

- L20 ･ AF-S DX12-24/4G -

ZOOM RING

Zoom ring

Groove

Convexity

#22

Zoom ring

#105

・

Attach #105 to the zoom ring, and

apply the oil barrier to the overall

#105.

・

Put the convexities (at 3 parts) inside

the zoom ring in the notches (at 3 parts) of #22, to assemble together.

All-round

3 convexities

REAR COVER RING

#64×2

#66×3

Rear cover ring

Grease: MZ-800S

Grease:GE-8

INC

JAA78451-R.3596.A

- L21 ･ AF-S DX12-24/4G -

#79

#104×4

Filter ring

FILTER RING

・

Put the convexity of the leter ring in the notch of the above, and

attach the lter ring with 4 screws (#104).

Notch

Convesity (on backside)

All-round

Filter ring

Grease: GE-8

INC

JAA78451-R.3596.A

- L22 ･ AF-S DX12-24/4G -

#G1

#42

#41

#102

#126 × 2

#101

#G2.3

● The size of 2 washers (#126) is xed (0.038mm).

1ST LENS GROUP

#87

#66

#127

・

Turn the zoom to the TELE side.

・

Attach the encoder brush (B4) in the

above position and x it with screw (#66). After adjusting,x #66 with the Screw Lock.

Position to attach the encoder brush

ZOOM ENCODER BRUSH

RUBBER RING

#35

#103

Attach with Screw Lock

INC

JAA78451-R.3596.A

- L23 ･ AF-S DX12-24/4G -

Focal length

（ｆ）

Standard

（ｍｍ）

１２ｍｍ－０．０５～＋０．１０１８ｍｍ－０．０５～＋０．１０２４ｍｍ－０．０５～＋０．１０

ADJUSTMENT (DIVISION) OF FOCUS MOVEMENT (T, W)

１．Fit the innity ( ∞ ) mark of the focus ring to the index.

２．Fix the aperture lever to make the aperture "full".

３．Read the values of the Wide and Tele sides.

４．Carry out the following calculations.

Ａ－Ｂ＝ＣＡ＝ Value of Tele side

Ｂ＝ Value of Wide side

Ｃ＝ Adjustment amount (mm) of the 2nd lens group unit washer #101

５．Adjust the thickness of the washer #101 by the value of C calculated in the above. If C is positive, thicken the

washer. If it is negative, thin the washer.

　　Note：When setting the washer #101, put a thin washer between thick washers.

ADJUSTMENT OF BACK FOCUS

１．Fit the innity ( ∞ ) mark of the focus ring to the index.

２．Fix the aperture lever to make the aperture "full".

３．Read the value of Wide or Tele side.

４．Remove the bayonet mount.

５．Adjust the thickness of the washer #100 by the difference from the standard value. If the difference value is

positive, thicken the washer. If it is negative, thin the washer.

INC

JAA78451-R.3596.A

- L23-1･ AF-S DX12-24/4G -

Added page

July. 01. 2005

Note: This adjustment is required when the 3rd lens groups is removed.

(1) Preparation of Lens to be examined

　　・

Remove the main PCB on Page L2-L4.

　　・

Remove the aperture lever of the bayonet mount.

　　・

Remove the solder of wires (blue and black) of M/A change SW from the main PCB.

　　・

Assemble the other parts, but exclude the main PCB, aperture lever, and rear cover ring.

　　・

Create an aperture opening tool for (AF-S DX12-24/4G).

Procedure

　　　①

Prepare one piece of rubber (17mm x 7.5mm x 2mm).

(Note) Choose relatively exible material of rubber that can be easily cut, because it is used for putting

in the clearance between the lens aperture lever and lens chamber.

　　　②

Cut the rubber sheet (17mm x 7.5mm x 2mm) into the below size.

　　・

By using the above created tool, set the lens to full aperture opening.

17.0mm

4.0mm

2.0mm

7.0mm

2.5mm

5.0mm

M/A change SW

Lens alignment

Aperture opening tool

INC

JAA78451-R.3596.A

- L23-2･ AF-S DX12-24/4G -

Added page

July. 01. 2005

(2) Preparation of Lens optical alignment equipment

・

Fix the attachment holder for the 3rd lens group (J19127J) in the lens equipment for center alignment.

How to x: Move down the holder-moving lever slowly so that the holder touches the stage. Then tighten 4

screws to x it.

　　・

Create the center positioning tool (ref. Page L23-13 for how to create it).

　　・

Create setting boards in which "Lens alignment chart" and "Viewers" are t. (ref. Page L23-15 for how

to create them.)

Holder-moving lever

Move down slowly

Holder for 3rd lens group (J19127J)

Stage

Screw×4

Lens alignment equipment (for periphery)

Monitor

LINE GENERATOR

MEGALIGHT 100

Attachment holder for 3G (J19127J

）

CCD camera

Lens optical alignment equipment for center (left) and periphery (right)

Lens alignment equipment (for center)

INC

JAA78451-R.3596.A

- L23-3･ AF-S DX12-24/4G -

Added page

July. 01. 2005

①

VIDEO cable

‘①VIDEO IN

②

VIDEO OUT

Back view of Lens optical alignment equipment for center and periphery

・

Connect each cable to the appropriate equipment with the same number. (e.g. Connect up

①

to‘

①

④

Power cable for CCD camera

‘

②

"VIDEO

IN" of LINE A

③

Fiber-optic cable

‘‘

③

Pinhole chart

‘

④

AC power for CCD camera

‘

③

Cross line chart

Chart shooting equipment for Lens alignment

Slide rail for Lens alignment equipment

The chart is embeddied in blackened cardboards.

INC

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