Nikon AF-S DX Zoom-Nikkor 12-24mm Repair manual

JAA78451-R.3596.A

INC

作成承認印

配布許可印

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

REPAIR MANUAL

NIKON CORPORATION

Tokyo, Japan

Recycled paper

Printed in Japan March 2003

SPECIFICATIONS

INC

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

JAA78451-R.3596.A

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

- M1

･ AF-S DX12-24/4G

Disassembly

INC

1ST LENS GROUP

JAA78451-R.3596.A

#101

FILTER RING

Filter ring

#104×4

#103

#35

#79

Remove the rubber ring (#35).

・

Remove the blindfolding-cover (#103).

・

Unscrew #79.

・

Take out 4 screws (#104).

・

Remove the lter ring.

・

- L1･ AF-S DX12-24/4G -

ZOOM RING

INC

JAA78451-R.3596.A

#127

Zoom ring

#66

#22

#87

Groove

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

#66×3

Convexity

#64×2

Rear cover ring

- L2･ AF-S DX12-24/4G -

BAYONET

INC

JAA78451-R.3596.A

INDEX RING, FOCUS RING

#100

Index ring

#110

#109×3

Index ring

M/A change-over

Fig. 1.

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 the index ring as shown in Fig. 2.

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

：

Focus ring

M/A change-over

Fig. 2.

- L3･ AF-S DX12-24/4G -

MAIN PCB

INC

JAA78451-R.3596.A

Zoom encoder FPC

MR sensor FPC

Distance encoder FPC

Main PCB

SWM－FPC

#89

Remove the FPCs (positioned at 4 parts)

・

from the connecter.

Unscrew #89.

・

Remove the main PCB.

・

SWM UNIT

#90×3

#29

SWM unit

- L4･ AF-S DX12-24/4G -

CAM RING UNIT

INC

#77

JAA78451-R.3596.A

#86

#72

#78 × 2

#97 × 2

#98 × 2

#72 × 2

#84 × 2

- L5･ AF-S DX12-24/4G -

Cam ring

INC

1st sliding ring

JAA78451-R.3596.A

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.

Can ring

1st sliding ring

2nd and 3rd units

#95×3

#135×3

#96×3

- L6･ AF-S DX12-24/4G -

2ND LENS GROUP

INC

JAA78451-R.3596.A

#72×2

#84×2

2nd lens group

3RD LENS GROUP

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.

#68×3

3rd lens group

Aperture blade housing

- L7･ AF-S DX12-24/4G -

Assembly

INC

JAA78451-R.3596.A

APERTURE BLADE HOUSING UNIT

Aperture blade housing unit

#59

B5 × 7

#80

#33

#59 × 2

#52

#56

#52

#80 × 2

#80

#60

#58

#59 × 2

#60

#33

#56

3RD LENS GROUP

#59

#58

#68 × 3

3rd lens group

Aperture blade housing

- L8･ AF-S DX12-24/4G -

2ND LENS GROUP

INC

#34

2nd lens group

#72×2

JAA78451-R.3596.A

Apply the grease (GE-8) to 3

・

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

#84×2

1ST SLIDING RING

Grease: GE-8

1st sliding ring

LIMIT PLATE

#96×3

#95×3

#135×3

Grease: GE-8

Cam ring

Grease: GE-8

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.

1st sliding ring

Cam ring

Limit plate

Grease: MZ-800S

#69×2

- L9･ AF-S DX12-24/4G -

ZOOM ENCODER FPC

INC

Attach with Super glue

Align the end of FPC in this position.

Attach the FPC along the groove.

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

Do not let the FPC run off downwards.

JAA78451-R.3596.A

CAM RING UNIT

Cam ring

2nd and 3rd group units

・

Cam ring

・

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.

#51

Notch

Guide roller

- L10 ･ AF-S DX12-24/4G -

1st sliding

INC

ring

JAA78451-R.3596.A

Turn the 1st sliding ring in

・

the direction indicated by the arrow.

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

#97×2

#98×2

#72×2

#84×2

#77

#72

Apply the grease (MZ-800S) to

・

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

#86

#78×2

- L11 ･ AF-S DX12-24/4G -

POSITION ADJUSTMENT OF LIMIT PLATE

INC

JAA78451-R.3596.A

#69

Limit plate

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.

#29

Fig. 1.

#55

Bayonet

#90×3

#109×3

Ａ

Fig. 2.

Aperture lever

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.

・

2nd and 3rd group units

- L12 ･ AF-S DX12-24/4G -

MR HEAD

INC

JAA78451-R.3596.A

MR sensor FPC

SWM unit

MR head

#541 × 2

#534

Magnetic tape

#533

#536

Attach the

・

head so that it is

ＭＲ

aligned parallel to the magnetic tape.

Attach the

・

sensor FPC so that

ＭＲ

it goes alongside the inside groove of the SWM unit.

#543

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.

- L13 ･ AF-S DX12-24/4G -

#90×3

INC

JAA78451-R.3596.A

#90×3

SWM unit

Rear xing

tube

Focus connection key

#86

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

Index ring

MF ring

Pass this FPC through the

hole of the index ring.

- L14 ･ AF-S DX12-24/4G -

Connections

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

Self-made tool

Power supply

Set values

５. ０Ｖ１００ｍＡ

(GND)

Oscilloscope Oscilloscope Power supply Power supply

(2ch) (1ch)

(+) (-)

Self-made tool

・How to conduct inspection and adjustment

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

　①

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

( ＋ )

Oscilloscope

（2ch）

　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.

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

　③

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 setting

V/Div (ch1) :

V/Div (ch2) :

Coupling :

Time/Div :

Trigger Mode :

Trigger Coupling :

Trigger Source :

Trigger Position :

Trigger Type :

Trigger Level :

INPUT (ch1) :

INPUT (ch2) :

ＮＯＲＭＡＬ

ＥＤＧＥ０Ｖ

２０ｍＶ２０ｍＶＡＣ

Sec

５ｍ

ＡＣＣＨ１

div

＋４

ＡＣＡＣ

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.

- L15 ･ AF-S DX12-24/4G -

JAA78451-R.3596.A

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

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

the two screws #541 and then shift the MR head position

MR head

as shown in the right gure.

Note

：During adjustment, prevent the magnetic tape and MR

＃ 541 × 2

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

Magnetic tape

　《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.

　● 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.

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

- L16 ･ AF-S DX12-24/4G -

SWM UNIT

INC

#131×4

#22

#88

SWM

JAA78451-R.3596.A

#22

Attach #88 to #22, and apply the oil

・

barrier to the overall #88. Build #22 in the SWM unit.

・

Tighten 4 screws (#131

・

）

#90×3

SWM unit

Focus connecting key

#86

#90×3

#29

Insert the focus

connecting key into

the groove of #86.

Pass the circled FPC through

the inside of #29.

- L17 ･ AF-S DX12-24/4G -

MAIN PCB

INC

JAA78451-R.3596.A

Zoom encoder FPC

MR sensor FPC

INDEX RING, FOCUS RING

Distance encoder FPC

Main PCB

SWM－FPC

#89

Attach the main PCB.

・

Screw #89.

・

Connect the FPC (at 4 parts) to the

・

connector.

Index ring

On the sliding surface with focus

ring.

Grease: MZ-800S

Focus ring

M/A change-over

Projection

#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.

- L18 ･ AF-S DX12-24/4G -

BAYONET

INC

Index ring

Slide the M/A change-over SW and

・

assemble into the index ring.

M/A change-over SW

JAA78451-R.3596.A

#100

#55

#110

#109×3

POSITION ADJUSTMENT OF APERTURE LEVER

J18004-1

Ａ

in A

Put the aperture lever

・

of the above.

Turn the zoom to the TELE side.

・

to the position where the 2nd and 3rd

（

(

#55

）

lens units are pushed downward.

Attach the tool (J18004-1) and make

・

sure of the aperture diameter.

）

#93×2

Aperture lever

- L19 ･ AF-S DX12-24/4G -

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.

REAR COVER RING

INC

#66×3

JAA78451-R.3596.A

#64×2

Rear cover ring

ZOOM RING

All-round

Grease: MZ-800S

3 convexities

Grease:GE-8

Zoom ring

#22

Groove

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.

Convexity

- L20 ･ AF-S DX12-24/4G -

FILTER RING

INC

JAA78451-R.3596.A

All-round

Grease: GE-8

Filter ring

Notch

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

・

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

Filter ring

#104×4

Convesity (on backside)

#79

- L21 ･ AF-S DX12-24/4G -

ZOOM ENCODER BRUSH

INC

JAA78451-R.3596.A

#127

#87

#66

Attach with Screw Lock

Position to attach the encoder brush

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.

RUBBER RING

1ST LENS GROUP

#41

#102

#G1

#42

#G2.3

#126 × 2

#103

#35

#101

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

- L22 ･ AF-S DX12-24/4G -

JAA78451-R.3596.A

INC

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.

Focal length

（ｆ）１２ｍｍ－０．０５～＋０．１０１８ｍｍ－０．０５～＋０．１０２４ｍｍ－０．０５～＋０．１０

Standard

（ｍｍ）

- L23 ･ AF-S DX12-24/4G -

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