Nikon AF-S Zoom-Nikkor ED 24-70mm/F2.8G (IF) Repair Manual
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Nikon AF-S Zoom-Nikkor ED 24-70mm/F2.8G (IF) Repair Manual

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AF-S Zoom-Nikkor ED
24-70mm/F2.8G(IF)
Printed in Japan November 2007
JAA80251
REPAIR MANUAL
JAA80251-R.3723.A
作成承認印
Copyright ｃ 2007 by Nikon Corporation.
All Rights Reserved.
無断転載を禁ず !!
INC
配布許可印
サービス
計画課
Ｍ

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Summary of Contents for Nikon AF-S Zoom-Nikkor ED 24-70mm/F2.8G (IF)

  • Page 1 JAA80251-R.3723.A 作成承認印 配布許可印 サービス 計画課 Ｍ AF-S Zoom-Nikkor ED 24-70mm/F2.8G(IF) JAA80251 REPAIR MANUAL Copyright ｃ 2007 by Nikon Corporation. All Rights Reserved. 無断転載を禁ず !! Printed in Japan November 2007...
  • Page 2 JAA80251-R.3723.A ※ Before Disassembly / Reassembly / Adjustment When disassembling/(re)assembling, be sure to use the conductive mat (J5033) and wrist strap (J5033-5) for static protection of electrical parts. When disassembling, make sure to memorize the processing state of wires, screws to be fixed and their types, etc.
  • Page 3 JAA80251-R.3723.A 1. Disassembly Filter ring Remove the sheet. � Take out the two screws (#63) and the screw (#79), and remove the filter ring. � Sheet #63×2 #79（Shoulder screw） Filter ring - Ｄ 2・AF-S 24-70/2.8G -...
  • Page 4 JAA80251-R.3723.A 1st lens-G unit Take out the two screws (#50) and the screw (#61), and remove the 1st lens-G unit. � Caution: If the G1 lens is removed, the lens alignment work will be necessary. #72×3 1st lens group G1 lens #61 (Countersunk screw) #50×2 G2, G3 lens...
  • Page 5 JAA80251-R.3723.A Sheet Remove the sheet (#163). � #163 G4 lens G4 lens is the hybrid aspheric lens. R1-surface of G4 lens is plastic surface, so dip a wiping cloth (Savina Minimax) a little in ethanol, and wipe the surface lightly. If dust/dirt is attached, blow them away with a blower as much as possible.
  • Page 6 JAA80251-R.3723.A Tape Peel off the four pieces of the tape (#193) of ① - ② , and remove the two cover plates (#194). � ① Zoom brush #194 #193 ② M/A brush - Ｄ ・AF-S 24-70/2.8G -...
  • Page 7 JAA80251-R.3723.A 5th lens Group Take out the three screws (#182) of the 5th lens group. � Take out the two screws (#180) of the contacts unit. � Caution: For [#182], a thicker screw (1K010-343) may be used to fit with the larger screw hole caused by adjustments.
  • Page 8 JAA80251-R.3723.A Bayonet mount unit Take out the four screws (#172). � Remove the bayonet mount unit. � Remove the Bf adjustment washer (#78). � Caution: Handle the blade actuating plate spring with care, because it can be easily deformed. #172×4 Bayonet mount unit Blade actuating plate spring - Ｄ...
  • Page 9 JAA80251-R.3723.A 4th lens group Remove the 4th lens group. � Caution: Removing the 4th lens group needs the lens alignment work. #81×3 4th lens group Washer Washer Washer （with being light-shielding tape attached） The hybrid aspheric lens is used for the bayonet side of the 4th lens group. If dust/dirt is attached, blow them away with a blower as much as possible.
  • Page 10 JAA80251-R.3723.A 3rd lens group Remove the 3rd lens group with [J11346]. � Washer 3rd lens group ★ J11346 - Ｄ ・AF-S 24-70/2.8G -...
  • Page 11 JAA80251-R.3723.A Rear fixed tube Take out the five screws (#174), and remove the rear fixed tube. � #174×5 Rear fixed tube Set the cam tube to WIDE-end. Take out the two screws (#67) and remove the zoom coupling key. � #67×2 Zoom coupling key - Ｄ...
  • Page 12 JAA80251-R.3723.A Zoom ring Align the cutout section of the exterior fixed tube with the convex portion of the zoom ring. Then � detach the zoom ring. Convex portion Zoom ring Exterior fixed tube Cutout section △ (Revision) Disconnect the focus zoom-FPC from the connector of the main PCB. �...
  • Page 13 JAA80251-R.3723.A Exterior fixed tube ・Take out the four screws (#174) of the exterior fixed tube. #174×4 Remove the exterior fixed tube. � Caution: When the exterior fixed tube is removed, be careful not to touch the main �CB and the focus : When the exterior fixed tube is removed, be careful not to touch the main �CB and the focus index sheet.
  • Page 14 JAA80251-R.3723.A MF ring Detach the MF ring and washer (#169) from the SWM unit. � #169 MF ring SWM unit - Ｄ ・AF-S 24-70/2.8G -...
  • Page 15 JAA80251-R.3723.A GMR unit Peel off the tape (#196). � #196 Disconnect the GMR-FPC from the connector of the main PCB. � Slide the connector in the direction of the arrow, and remove the FPC. Main PCB Take out the screw (#73) and remove the GMR unit. �...
  • Page 16 JAA80251-R.3723.A Main PCB unit Take out the screw (#120). � #120 Remove the contact-FPC from the main PCB. � Remove the focus-FPC from the main PCB. � Remove the SWM relay-FPC from the main PCB. � SWM relay-FPC Contact-FPC Focus-FPC Main PCB Take out the two screws (#81) and two washers (#74), and remove the main PCB unit.
  • Page 17 JAA80251-R.3723.A SWM coupling key ・Take out the two screws (#96) and remove the SWM coupling key. SWM coupling key #96×2 Focus coupling key △ (Deletion) ・Take out the two screws (#96), and remove the focus coupling key. Focus coupling key #96×2 Focus encoder brush ・Take out the screw (#96) and remove the focus encoder brush.
  • Page 18 JAA80251-R.3723.A ・Attach the protection tape to the SWM relay-FPC. (Do NOT attach the FPC-contacts area.) Protection tape SWM relay-FPC ・Remove the rollers from the focus fixed tube (by following the order from "Fig.1" to "Fig.3".） Focus fixed tube Roller #158 Fig.1 #157 Fig.2...
  • Page 19 JAA80251-R.3723.A ・Remove the focus fixed tube from the inner fixed tube. Be careful so that fingers or a screwdriver do NOT touch the magnetic surface. Magnetic tape Focus fixed tube Inner fixed tube - Ｄ 8・AF-S 24-70/2.8G -...
  • Page 20 JAA80251-R.3723.A Focus coupling key ・Set the zoom to TELE-end position, and disengage the focus coupling key from the focus coupling pin. Focus coupling key Lens (front) Focus coupling pin （∞ infinity-end) Zoom: TELE-end position - Ｄ ・AF-S 24-70/2.8G -...
  • Page 21 JAA80251-R.3723.A Removal of Washer With alcohol, remove each screw lock that was applied to the washers (#160) at three places. � Push down the washer (#160) at the position of the concave portion of the inner fixed tube, and turn the �...
  • Page 22 JAA80251-R.3723.A SWM unit ・Remove the three rollers of the SWM unit. ・Remove the SWM unit from the inner fixed tube. #158 Roller ×3 #159 Adhesive: Lockend B Be careful of the facing direction of #159 when assembled. SWM unit Inner fixed tube - Ｄ...
  • Page 23 JAA80251-R.3723.A Hood fixed ring ・Take out the three screws (#174). Hood fixed ring #174×3 ・Set the zoom to WIDE-end position, and remove the hood fixed ring from the inner fixed tube. Hood fixed ring Inner fixed tube - Ｄ 22・AF-S 24-70/2.8G -...
  • Page 24 JAA80251-R.3723.A 1st lens-G lead ring ・Peel off the three pieces of tape (#107). #107×3 ・Remove the three rollers. Roller ×3 - Ｄ 2・AF-S 24-70/2.8G -...
  • Page 25 JAA80251-R.3723.A 1st lens-G lead ring (continued) Detach the 1st lens-G lead ring by disengaging the three 1st lens-G lead keys from the key grooves. � 1st lens-G lead key Key groove 1st lens-G lead ring 1st lens-G lead key Take out the two screws (#191) each at three places, and remove the three 1st lens-G lead keys. �...
  • Page 26 JAA80251-R.3723.A SWM brush ・Remove the solders of the eight lead wires (which are connected from the followings) from the SWM relay-FPC. Red: SWM brush Black: M-ring detection （Lead wire/short) Red: SWM brush Yellow: M-ring detection （Lead wire/long) Yellow: SWM brush Black: SWM brush (Lead wire/long) Lead wire/long)
  • Page 27 JAA80251-R.3723.A Caution: In order to maintain optical accuracy, the inner fixed tube (1C999-528) is set as assembled unit. If disassembled, therefore, it will be unrepairable at repair service facilities. Inner fixed tube (1C999-528) - Ｄ 2・AF-S 24-70/2.8G -...
  • Page 28 JAA80251-R.3723.A 2 ． Assembly / Adjustment SWM relay-FPC ・Attach the SWM relay-FPC to the inner fixed tube, based on the reference position. Inner fixed tube SWM relay-FPC Reference position for attachment - Ａ ・AF-S 24-70/2.8G -...
  • Page 29 JAA80251-R.3723.A SWM brush ・Attach the SWM brushes (lead wires/long and short) to the inner fixed tube, and tighten two screws (#50) each at two places. Inner fixed tube SWM brush SWM brush (Lead wire/long) (Lead wire/short) #50×2 #50×2 Adhesive: Screw lock Adhesive: Screw lock ・Solder the eight lead wires on the SWM relay-FPC.
  • Page 30 JAA80251-R.3723.A Selection and Temporary attachment of 1st lens-G lead key Select the 1st lens-G lead key from A to C, based on the groove width of the 1st lens-G lead key. � Attach temporarily the three 1st lens-G lead keys to the inner fixed tube with two screws (#191) each at �...
  • Page 31 JAA80251-R.3723.A Adjustment and Firm attachment of 1st lens-G lead key As below, position the 1st lens-G lead key and the 1st lens-G lead ring. � 1st lens-G lead ring 1st lens-G lead key Tighten three screws (#191) in numeric order from ① to ③ . �...
  • Page 32 JAA80251-R.3723.A As below, position the 1st lens-G lead key and the 1st lens-G lead ring along the white dot line. � 1st lens-G lead ring 1st lens-G lead key Tighten three screws (#191) in numeric order from ④ to ⑥ . �...
  • Page 33 JAA80251-R.3723.A Hold the 1st lens-G lead ring at the uppermost position, and confirm that the 1st lens-G lead ring drops � by its own weight. If not, go back to Page A4 and make a readjustment. � 1st lens-G lead ring 1st lens-G lead ring ・Attach the 1st lens-G lead ring with three rollers.
  • Page 34 JAA80251-R.3723.A Hood fixed ring ・Mount the hood fixed ring on the inner fixed tube, and align "A" and "B". Hood fixed ring Index position Inner fixed tube ・Attach the hood fixed ring with three screws (#174). Hood fixed ring #174×3 Adhesive: Lockend B - Ａ...
  • Page 35 JAA80251-R.3723.A ・Attach the three plate springs with two screws (#96) each at three places. [Select the plate spring (from A or B type) by checking the followings:] ・When the MF ring is rotated slowly, check whether the focus index ring subsequently moves together. (If the focus index ring does not follow smoothly, change the spring to a thicker one.）...
  • Page 36 JAA80251-R.3723.A SWM unit ・Attach the protection tape to the SWM relay-FPC. (Do NOT attach to the FPC-contacts area.) SWM relay-FPC Protection tape ・Mount the SWM unit on the inner fixed tube. ・To attach the SWM unit firmly to inner fixed tube, tighten three rollers. SWM unit Roller ×3 Adhesive: Lockend B...
  • Page 37 JAA80251-R.3723.A Putting of Washer Put the washers (#161 and #156) on the inner fixed tube. � Fit the convex portion of the washer (#160) with the grooved guide track of the inner fixed tube, and put � the washer. (Fig.1) Rotate the washer (#160) leftwards, and fit the convex portion of the washer in the concave portion of �...
  • Page 38 JAA80251-R.3723.A Fixing of Washer ・Apply the screw lock to the engaged areas of the inner fixed tube and the washers (#160) (in numeric order from "Fig.1" to "Fig.3".） Inner fixed tube #160 Apply here. Adhesive: Screw lock Fig.1 Apply here. Adhesive: Screw lock Fig.2 Apply here.
  • Page 39 JAA80251-R.3723.A Focus coupling key ・Set the zoom to TELE-end position. Insert the focus coupling key, and put the focus coupling pin in the key groove. Focus coupling key Grease: I-40 Apply to the key groove. Inner fixed tube ・Viewed from the front of the lens, confirm that the focus coupling pin and the focus coupling key are engaged with each other.
  • Page 40 JAA80251-R.3723.A ・Put the focus fixed tube, with the magnetic tape facing upwards. Focus fixed tube Magnetic tape Grease: NKS-211SP Apply to the tape surface. ・Mount the focus fixed tube on the inner fixed tube. Be careful so that fingers or a screwdriver do NOT touch the magnetic surface. Magnetic tape Focus fixed tube Inner fixed tube...
  • Page 41 JAA80251-R.3723.A ・Attach three rollers to the focus fixed tube (in numeric order from "Fig.1" to "Fig.3".） #158 Roller Adhesive: Lockend B Fig.1 #157 Be careful of the facing direction of #157 when assembled Roller Adhesive: Lockend B Fig.2 Roller Adhesive: Lockend B Fig.3 - Ａ...
  • Page 42 JAA80251-R.3723.A ・Attach the focus coupling key to the focus fixed tube with two screws (#96). Confirm that the focus coupling pin fits in the groove of the focus coupling key. Focus fixed tube Focus coupling key #96×2 Adhesive: Lockend B Focus-FPC / Focus encoder brush Focus encoder brush ・Attach the focus-FPC, based on the reference hole and reference position.
  • Page 43 JAA80251-R.3723.A Positioning of Focus encoder brush ① Set the zoom to Middle position, and turn the focus turning-tube towards "∞"-side. (Fig.1) ② Insert the "∞" (infinity) positioning tool ( ★ J11347) into the tool hole. (Fig.2) ③ Position the focus encoder brush, and tighten the screw (#96). (Fig.3) Fig.1 ∞Positioning tool ★�...
  • Page 44 JAA80251-R.3723.A SWM coupling key ・As below, fit "B" of the SWM with "A" of the SWM coupling key . ・Attach the SWM coupling key to the focus turning-tube with two screws (#96). Focus turning-tube Ｂ SWM coupling key Ａ #96×2 Adhesive: Lockend B - Ａ...
  • Page 45 JAA80251-R.3723.A Main PCB unit Attach the tape (#196) to the main PCB. � Caution: To prevent short-circuit, attach the tape so that the pins of the CPU do not touch the screw. #196 Attach the main PCB based on the reference position, and stabilize with two screws (#81) and two �...
  • Page 46 JAA80251-R.3723.A Connect the contact-FPC and focus-FPC to each connector. � Tuck the slackened portion of each FPC into the back of the main PCB. � Contact-FPC Focus-FPC Attach the lug plate with the screw (#120). � Put the lug plate with the soldered side facing outwards, and attach it.
  • Page 47 JAA80251-R.3723.A GMR unit △ (Revision) Based on the following reference position, attach the tape (#190 #197) to the GMR base plate, and � peel off a backing paper of the tape. #197 TA-0004(3×10) GMR base plate Reference position △ (Revision) Based on the following reference position, attach the tape (#190 #197) to the GMR base plate.
  • Page 48 JAA80251-R.3723.A Align the reference position of the back side of the GMR unit with the reference position of the � inner fixed tube. Then tighten the screw (#73). Reference position for attachment Back side of GMR unit Inner fixed tube Reference position for attachment GMR unit Adhesive: Screw lock...
  • Page 49 JAA80251-R.3723.A Inspection and Adjustment of GMR output waveform ● When the GMR unit is disassembled and replaced, be sure to make the inspection and adjustment. 1. Device: 　　・Single-output rated voltage power-supply 1 unit: 5V 100mA 1 unit 　　・Oscilloscope 　　・GMR output inspection tool 1 unit J11341 　Caution: If there is a problem with continuity between the contacts of the GMR output inspection...
  • Page 50 JAA80251-R.3723.A 3．How to inspect and adjust: ・Confirm that the electric current and voltage of the connected rated voltage power-supply are set values, then turn it ON. ・Set the oscilloscope, and turn the focus turning-tube (ref. Page A16) with hand. In case large waveform-noise is detected, use the FILTER function. ・...
  • Page 51 JAA80251-R.3723.A 　＜ Ref. ＞ 　● As shown in Fig. 1, if the amplitude of only either CH1 or CH2 is small, one of the 2 screws (#119) may be loosened, so check for it. If this is not the case, the GMR sensor may malfunction so replace it and make a readjustment.
  • Page 52 JAA80251-R.3723.A GMR unit Based on the reference position, fix the GMR-FPC with the tape (#196). � Attach [#196] so that its upper part protrudes from the edge of the GMR base plate by 1mm as below. Then push [#196] from above with the fingers. Caution: Do NOT attach [#196] at the closer position to the GMR sensor than [#197].
  • Page 53 JAA80251-R.3723.A MF ring Mount the MF ring and washer (#169) on the SWM unit. � #169（Select from A to C) Standard: B Caution: Put with rounded surface facing downwards MF ring Grease�GN-20S Apply to sliding surface Grease: OS-30MEL Apply to the overall sliding surface SWM unit - Ａ...
  • Page 54 JAA80251-R.3723.A Zoom FPC Attach the zoom-FPC to the exterior fixed tube, based on the reference position. � Grease: NKS-211SP Pattern face Focus window Name plate Reference position of attachment Lead wire (black) Lead wire (blue) Bend the zoom-FPC slightly inwards at "A" area. �...
  • Page 55 JAA80251-R.3723.A Exterior fixed tube Set the MF ring to the close-end. � Fit the reference pin of the exterior fixed tube in the reference pinhole of the inner fixed tube, and mount � on the inner fixed tube. Caution: Mount the exterior fixed tube so that it does NOT touch the main PCB and focus index Reference pin sheet.
  • Page 56 JAA80251-R.3723.A Connect the zoom-FPC to the connector of the main PCB. � Tuck the zoom-FPC inwards as below. � Zoom FPC Zoom ring Fit the cutout of the exterior fixed tube unit with the convex portion of the zoom ring, then mount �...
  • Page 57 JAA80251-R.3723.A Set the cam tube to WIDE-end. Put the zoom coupling key in the zoom key groove and tighten two � screws (#67) in numeric order from ① to ② . To Zoom key groove ② ①　 #67×2 Adhesive: Lockend B Zoom coupling key Zoom key groove Rear fixed tube...
  • Page 58 JAA80251-R.3723.A 3rd lens group Assemble the 3rd lens group with [J11346]. � Washer （Select from A to J） 3rd lens group ★ J11346 - Ａ ・AF-S 24-70/2.8G -...
  • Page 59 JAA80251-R.3723.A △ (Deletion) 4th lens group Set the zoom to WIDE-end position. By using two pins (J11349) as guide, insert them and put the washer � and mount the 4th lens group. (Fig.1) Caution: Removing the 4th lens group needs the lens alignment work. #81×3 4th lens group Washer...
  • Page 60 JAA80251-R.3723.A Bayonet mount unit #113×2 3.1 lever Bayonet mount Mount rubber Disk lever C-ring Bayonet mount Body side #175 Adhesive: Lockend B Spring Spring hooking plate Grease: I-40 #118 Mount rubber Apply to the sliding surface.　 Direction of attaching Mount rubber Put the Bf adjustment washer (#78).
  • Page 61 JAA80251-R.3723.A Limit plate adjustment Set the zoom ring to TELE-end. � Press the aperture lever all the way towards the direction for full aperture so that the aperture becomes � full open by the blades. Aperture lever If the aperture does not get full open by the blades or the aperture blades are fully opened too quickly, �...
  • Page 62 JAA80251-R.3723.A 4th lens group Set the zoom to WIDE-end position. By using two pins (J11349) as guide, insert them and put the washer � and mount the 4th lens group. (Fig.1) Caution: Removing the 4th lens group needs the lens alignment work. #81×3 4th lens group Washer...
  • Page 63 JAA80251-R.3723.A Aperture lever adjustment Set the zoom ring to TELE-end. � Confirm that when the lock pin of "J18004-1" is put in the lock hole of the bayonet, the aperture � becomes full open by the blades. J18004-1 If the aperture blades are fully opened too quickly or slowly, adjust the position of the aperture �...
  • Page 64 JAA80251-R.3723.A Zoom brush Set the zoom ring to TELE-end. � Align the reference position for the zoom brush with the rounded part of the brush, and tighten � screw (#96). Reference position for Zoom brush Zoom brush Rounded part Zoom ring Zoom brush Adhesive: Screw lock Measure electrical continuity between the screw of zoom brush (#96) and the bayonet GND with a tester.
  • Page 65 JAA80251-R.3723.A M/A brush Attach the M/A brush with the screw (#100). � By visual check, confirm that the M/A brush touches the pattern surface. � M/A brush #100 Adhesive: Screw lock Tape Cover the opening areas of ① and ② by attaching the two cover plates (#194) with two pieces of the �...
  • Page 66 JAA80251-R.3723.A Rubber ring Attach the focus rubber ring. � Attach the zoom rubber ring. � Zoom rubber ring Be careful of assembling direction. Bayonet side Sloped Rubber ring Zoom ring Cross-section view of Focus ring/Zoom ring Focus rubber ring Sheet Attach the sheet (#163).
  • Page 67 JAA80251-R.3723.A 1st lens-G unit Mount the 1st lens group, and tighten the two screws (#50) and the screw (#61) in numeric order from ① � to ③ . Caution: If G1 lens is removed, the lens alignment work will be necessary. 1st lens group #72×3 Positioning of G1 lens...
  • Page 68 JAA80251-R.3723.A Filter ring Mount the filter ring, and tighten the two screws (#63) and the screw (#79) in numeric order from � ① to ③ . Attach the sheet. � Sheet #63×2 #79（Shoulder screw） ③ ① Filter ring ② This hole diameter is larger than the other two. - Ａ...
  • Page 69 JAA80251-R.3723.A 5th lens group Position the 5th lens group in the direction of the arrow, and tighten three screws (#182). � Attach the contacts unit with two screws (#180). � If the screwhole for [#182] got larger, use the thicker screw (1K010-343) instead. [#182] has M1.4-diameter, while [1K010-343] has M1.7-diameter.
  • Page 70 JAA80251-R.3723.A Adjustment of Focus movement (T, W) ref. Page A39 ① Select "6. Infinity positioning for FFD adjustment" of AF-S24-70 inspection and adjustment software (J18427), and perform "∞" (infinity) adjustment. ② Fix the aperture lever so that the aperture is full open. ③...
  • Page 71 JAA80251-R.3723.A Preparation for Inspection & Adjustment ● In case of replacing the main PCB, SWM unit, GMR sensor, or focus turning-tube, be sure to make the below inspection and adjustment. 1. Adjustment: 　・Adjustment for Electrical Device 2. Inspection : ・Inspection of Lens switches and Lens condition ・Inspection of GMR-encoder Operations ・Inspection of Lens Driving Stop Accuracy ・Inspection Lens Driving Time...
  • Page 72 JAA80251-R.3723.A 【System configuration】 ★ : New tool Constant-voltage power supply (Set voltage: 6V) （＋） （－） Oscilloscope If the RS232C terminal of PC is a 9-pin type, connect it by using the 25-pin/9-pin conversion AF-I communication box connector. This connector is NOT supplied as RJ, (J15306-1) so use commercial products on the market.
  • Page 73 JAA80251-R.3723.A AF-S 24-70 inspection program ● 　(1) Menu screen ・Menu items Items 1 is used for "Adjustment for Electrical Device". Items from 2 through to 5 are used for "Inspections". Items 6 is used for positioning to become "Infinity" of the focus encoder when FFD adjustment is made. 　Item 7 is used for reading "Lens Firmware Version".
  • Page 74 JAA80251-R.3723.A Adjustment for electrical device ● In case of replacing the main PCB and SWM unit, GMR sensor or focus turning-tube, be sure to make adjustments. ・Select "Adjustment for Electrical Device" on the menu. ・Follow the instructions on the screen for preparation. Then click "Next". 　・...
  • Page 75 JAA80251-R.3723.A ● Oscilloscope setting C H 1 = 5 V C H 2 = 5 V 5 m s / d i v D C 1 0 : 1 D C 1 0 : 1 : 5V 　V/Div（CH1） NORM 200KS/s : 5V 　V/Div（CH2）...
  • Page 76 JAA80251-R.3723.A Inspection of Lens operations Check the lens operations by using a PC after assembling. ○ Check on PC 　● Inspection item: 　　1. GMR encoder operations 　　・Perform the scanning-drive of lens and check the total number of pulses. 　　・In case the GMR encoder is defective, the number of pulses becomes out of standard. 　　2.
  • Page 77 JAA80251-R.3723.A 　(1) Inspection screen of GMR encoder operations ・Select "Inspection of GMR-encoder Operations" on the menu. ・Follow the instructions on the screen for preparation. Then click "Next". 　 ・ Click "Start insp." button . 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.
  • Page 78 JAA80251-R.3723.A 　(2) Inspection screen of lens driving stop accuracy ● Make inspections by focal length 24mm (W) or 70m (T) at the following five lens positions. (Lens position in inspecting) Horizontal lens position Index 90° angle rightward (from horizontal position) Index 90°...
  • Page 79 JAA80251-R.3723.A ・When the inspection ends, the result will be indicated. If "Inspection result" shows "Good", click "Close" button. ① ④ ② ③ The number of overrun/underrun pulses must be within the standards after the lens back-and forth driving 5-motion ("1/1TIME (S)." in -motion ("1/1TIME (S)."...
  • Page 80 JAA80251-R.3723.A 　(3) Inspection screen of lens driving time ● Make inspections by focal length 24mm (W) or 70m (T) at the following five lens positions. (Lens position in inspecting) Horizontal lens position Index 90° angle rightward (from horizontal position) Index 90°...
  • Page 81 JAA80251-R.3723.A ●Oscilloscope setting 　V/Div �5V 　Coupling �DC E terminal �20m Sec 　Time/Div 　Trigger Mode �SGL (S) H terminal 　Trigger Coupling �DC 　Trigger Source �CH1 Driving time ※ There are two types in shape of waveforms of E and H terminals: Waveform (1) starts and goes up (2) starts and goes down.
  • Page 82 JAA80251-R.3723.A 　 （5）Backup / Restoring of FLASH-ROM How to back up FLASH-ROM data 　・Click "Backup / Restoring of EEP-ROM Data" button. ・Click ["Read from" Lens] button. ・Follow the instructions on the screen for preparation. Then click "Next". ・ When reading FLASH-ROM data is completed, click "OK" button. ・Click ["Write into"...
  • Page 83 JAA80251-R.3723.A ・Type the file name in any folder, and click "Save" button. e.g. File name ・Click "OK" button. ・Click "Close" button to end. - Ａ ・AF-S 24-70/2.8G -...
  • Page 84 JAA80251-R.3723.A How to Restore FLASH-ROM data 　・Click "Backup / Restoring of FLASH-ROM Data" button. ・Click ["Read from" File] button. ・Select the file name in the folder that was saved as backup, and click "Open" button. e.g. ・When reading FLASH-ROM data is completed, click "OK" button. ・Click ["Write into"...
  • Page 85 JAA80251-R.3723.A ・Follow the instructions on the screen for preparation. Then click "Next". ・Click "OK" button. ・Click "Close" button. - Ａ 7・AF-S 24-70/2.8G -...
  • Page 86 JAA80251-R.3723.A Necessary adjustment when replacing parts Adjustments Lens alignment Adjustment for electrical device (incl. aberration compensation Parts to be inspection) replaced ○ ○ 　Main PCB unit （Aberration compensation inspection only） ○ 　SWM unit ○ 　GMR sensor ○ 　Focus turning-tube unit ○...
  • Page 87 JAA80251-R.3723.A Aberration compensation data writing adjustment ・ This adjustment uses the software which calculates the aberration compensation data according to the feature of lens aberration and writes in FLASH-ROM of the lens, in order to improve the accuracy of autofocus. Note: This adjustment is necessary when the main PCB and/or each lens part (glass, lens chamber) is replaced and/or when each lens part is disassembled.
  • Page 88 JAA80251-R.3723.A （ Target chart ） （ Resolution chart ） - Ａ 0・AF-S 24-70/2.8G -...
  • Page 89 JAA80251-R.3723.A (3) Writing aberration compensation data ① Prepare a camera. Set the "Exposure mode" to "A", the aperture to "Full", and "Focus mode" to "S". On the shooting menu, set the "Image quality mode" to "FINE", "Image size" to"L", "WB" to "Preset", , "WB"...
  • Page 90 JAA80251-R.3723.A △ (Revision) 　⑥ Confirm that "AF-S 14 24-70/2.8G" is selected on "Lens select" screen. Click "OK". 　⑦ Click the "Defocus rectify..." . サービス 計画課 Ｍ - Ａ 62・AF-S 24-70/2.8G - Changed Page　△× 1 December.10.2007...
  • Page 91 JAA80251-R.3723.A 　⑧ Click the "JPEG Shot". ⑨ The shutter is released after the AF operation. The shot image is automatically displayed on the PC The shutter is released after the AF operation. The shot image is automatically displayed on the PC screen.
  • Page 92 JAA80251-R.3723.A 　⑪ Set the focal length of the lens (to be inspected) to "50 mm", and also set the distance between the test chart and camera (CCD face) to 1m 50cm ± 2cm . 　　Caution: Confirm that the aperture is fully open. 　⑫...
  • Page 93 JAA80251-R.3723.A 　�� �� When the following screen appears, click "OK". 　�� �� The reconfirmation screen is displayed. Click "OK". 　�� �� When the rewriting ends and the following screen appears, click "OK".　　 　　 　⑲ Click "END" twice to complete the adjustment software.　　 Note: Unless the camera is turned off once, the value that was written in FLASH-ROM is not reflected.
  • Page 94 JAA80251-R.3723.A 　� � Check whether an object is in focus by actually taking pictures. If it is out of focus, make the readjustment. If this phenomenon does not improve even after repeating the procedure, some abnormal value may have been written in the FLASH-ROM. In this case, therefore, click "Design value Rewriting" and input the initial value, and then make the adjustment.
  • Page 95 JAA80251-R.3723.A 工具編 TOOLS ★：NEW TOOL RJ 番号 名称 備考 RJ No. NAME OF TOOL OTHERS 横型焦点面検査器 AT-500H J15430 BACK FOCUS COLLIMATER ★ 安定化電源５Ａ J9001-5N-1 DC REGULATED POWER SUPPLY 5A J15306-1 ＡＦ－Ｉ通信ボックス AF-I LENS COMMUNICATION BOX(CE) J15307 ＡＦ－Ｉ通信アダプター COMMUNICATION ADAPTER FOR AF-I J18004-1 Ｊ１８００４用基準ゲージ...
  • Page 96 JAA80251-R.3723.A ★�NEW TOOL RJ 番号 名称 備考 RJ No. NAME OF TOOL OTHERS J5400 5400 鉛フリー糸はんだ RMA02(M705) 0.5MMX500G ECO SOLDER RMA02(M705) 0.5MMX500G J***** 調芯装置用チャート LENS ALIGNMENT CHART ★ J19128A ライトビューワー（J28 用） LIGHT VIEWER (J19128) J19129 調芯装置用スライドレール LENZ ALIGNMENT EQUIP.SLIDE RAIL J19127S AF-S 24-70G 用�ルダー...
  • Page 97 JAA80251-R.3723.A ★�NEW TOOL RJ 番号 名称 備考 RJ No. NAME OF TOOL OTHERS MZ-800SEL ドライサ－フ　ＭＺ－８００ＳＥＬ ＥＬ DRY SURF MZ-800SEL GP-1RS グリ－ス　ＧＰ－１ＲＳ FOR AF-S 18-135 GREASE GP-1RS M300S ザヴィーナ ミニマックス SAVINA MINI MAX J11341 ＧＭＲ出力点検工具 FOR AF-S 18-135 GMR output inspection tool - Ｔ...

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