Sony DSLR-A900 User manual

Revision History
Revision History
Sony EMCS Co.
SERVICE MANUAL
LEVEL 2
Link
Link
DSLR-A900_L2
DISASSEMBLY
SERVICE NOTE
SPECIFICATIONS
SCHEMATIC DIAGRAMS
FRAME SCHEMATIC DIAGRAMS
BLOCK DIAGRAMS
REPAIR PARTS LIST
PRINTED WIRING BOARDS
2009G0500-1
© 2009.7
Published by Kohda TEC9-852-609-33
The components identified by
mark 0or dotted line with
mark 0are critical for safety.
Replace only with part num-
ber specified.
Les composants identifiés par une
marque 0sont critiques pour la
sécurité.
Ne les remplacer que par une pièce
portant le numéro spécifié.
Ver. 1.2 2009.07
US Model
Canadian Model
AEP Model
UK Model
E Model
Australian Model
Hong Kong Model
Chinese Model
Korea Model
Japanese Model
DSLR-A900
RMT-DSLR1
DIGITAL SINGLE LENS REFLEX CAMERA

— 2 —
DSLR-A900_L2
SPECIFICATIONS
Camera
[System]
Camera Type
Digital Single Lens Reflex Camera
and interchangeable lenses
Lens All of αLens (except for DT lens*)
*Using a DT lens is not guaranteed because the
corners of the field are darkened and the camera
does not meet the primary AE performance
standard. The APS-C size is automatically
selected.
[Image sensor]
Total pixel number of camera
Approx. 25 720 000 pixels
Effective pixel number of camera
Approx. 24 610 000 pixels
Image format
35 mm (35.9×24.0) CMOS sensor
ISO sensitivity (Recommended exposure index)
AUTO, 100 to 6400
[SteadyShot]
System Sensor-Shift mechanism
SteadyShot Compensation capability
Approximately 2.5 to 4 EV decrease
in shutter speed (varies according to
shooting conditions and lens used)
[Anti-Dust]
System Charge protection coating on
Low-Pass Filter and image
sensor-Shift mechanism
[Viewfinder]
Type Fixed eye-level system with
pentaprism
Focusing Screen
Spherical Acute Matte
(exchangeable, option)
Frame coverage
Approx. 1
Magnification
0.74 ×with 50 mm lens at infinity,
–1 m –1
Eye point Approximately 20 mm from the
eyepiece
Diopter Adjustment
–3.0 to +1.0 m–1
[Auto Focus System]
System TTL phase-detection system, CCD
line sensors (with center dual
cross-hair sensor, F2.8 sensor)
Ranging point
9 points and 10 supplementary
ranging points
Sensitivity Range
0 to 18 EV (at ISO 100 equivalent)
AF illuminator
Approx. 1 to 7 m (3.3 to 23 feet)
[Exposure]
Metering Cell
40-segment honeycomb-pattern SPC
Metering Range
0 to 20 EV (2 to 20 EV with Spot
metering), (at ISO 100 with
F1.4 lens)
[Shutter]
Type Electronically-controlled, vertical-
traverse, focal-plane type
Speed range 1/8000 second to 30 seconds, bulb
Flash sync speed
1/250 second (SteadyShot
deactivated),
1/200 second (SteadyShot activated)
[Recording media]
CompactFlash card (TypeI,II),
Microdrive, “Memory Stick Duo”
[LCD monitor]
LCD panel 7.5 cm (3.0 type) TFT drive
Total number of dots
921 600 (640 ×3 (RGB) ×480) dots
[LCD monitor]
With backlighting
[Power, general]
Used battery pack
Rechargeable battery pack
NP-FM500H
[Others]
PictBridge Compatible
Exif Print Compatible
PRINT Image Matching III
Compatible
Dimensions Approx. 156.3 ×116.9 ×81.9 mm
(6 1/4 ×4 5/8 ×3 1/4 inches)
(W/H/D, excluding protrusions)
Mass Approx.850 g (1 lb 14 oz) (without
batteries, memory card and body
accessories)
Operating temperature
0 to 40°C (32 to 104°F) (When using
the Microdrive: 5 to 40°C (41 to
104°F))
Exif Exif Ver.2.21
USB communication
Hi-Speed USB (USB 2.0 compliant)
BC-VM10 Battery charger
Input rating 100 V – 240 V AC, 50/60 Hz
Output rating
8.4 V DC, 750 mA
Operating temperature range
0 to 40°C (32 to 104°F)
Storage temperature range
–20 to +60°C (–4 to +140°F)
Maximum dimensions
Approx. 70 ×25 ×95 mm
(2 7/8 ×1 ×3 3/4 inches) (W/H/D)
Mass Approx. 90 g (3.2 oz)
Rechargeable battery pack
NP-FM500H
Used battery
Lithium-ion battery
Maximum voltage
DC 8.4 V
Nominal voltage
DC 7.2 V
Maximum charge current
2.0 A
Maximum charge voltage
DC 8.4 V
Capacity 11.8 Wh (1 650 mAh)
Maximum dimensions
Approx. 38.2 ×20.5 ×55.6 mm
(1 9/16 ×13/16 ×2 1/4 inches)
(W/H/D)
Mass Approx. 78 g (2.8 oz)
Design and specifications are subject to change
without notice.

1-1
ENGLISH JAPANESE
ENGLISH JAPANESE
DSLR-A900_L2
1. SERVICE NOTE
1-1. CHEMICALS
Some chemicals used for servicing are highly volatile.
Their evaporation caused by improper management affects your health and environment, and wastes resources.
Manage the chemicals carefully as follows.
•Store chemicals sealed in a specific place to prevent from exposure to high temperature or direct sunlight.
•Avoid dividing chemicals into excessive numbers of small containers to reduce natural evaporation.
•Keep containers sealed to avoid natural evaporation when chemicals are not in use.
•Avoid using chemicals as much as possible. When using chemicals, divide only required amount to a small plate from the container and
use up it.
1-2. EXTERIOR PARTS
Be careful to the following points for plastic parts used in this unit.
• Use a piece of cleaning paper or cleaning cloth for cleaning plastic parts. Avoid using chemicals.
Even if you have to use chemicals to clean heavy dirt, don’t use paint thinner, ketone, nor alcohol.
•Insert the specific screws vertically to the part when installing a plastic part.
Be careful not to tighten screws too much.
1-3. UNLEADED SOLDER
This unit uses unleaded solder.
Boards requiring use of unleaded solder are printed with the lead free mark (LF) indicating the solder contains no lead.
(Caution: Some printed circuit boards may not come printed with the lead free mark due to their particular size.)
: LEAD FREE MARK
Be careful to the following points to solder or unsolder.
• Set the soldering iron tip temperature to 350 °C approximately.
If cannot control temperature, solder/unsolder at high temperature for a short time.
Caution: The printed pattern (copper foil) may peel away if the heated tip is applied for too long, so be careful!
Unleaded solder is more viscous (sticky, less prone to flow) than ordinary solder so use caution not to let solder bridges occur
such as on IC pins, etc.
•Be sure to control soldering iron tips used for unleaded solder and those for leaded solder so they are managed separately. Mixing
unleaded solder and leaded solder will cause detachment phenomenon.
1-4. SAFETY CHECK-OUT
After correcting the original service problem, perform the following safety checks before releasing the set to the customer.
1. Check the area of your repair for unsoldered or poorly-soldered connections. Check the entire board surface for solder splashes and
bridges.
2. Check the interboard wiring to ensure that no wires are “pinched” or contact high-wattage resistors.
3. Look for unauthorized replacement parts, particularly transistors, that were installed during a previous repair. Point them out to the
customer and recommend their replacement.
4. Look for parts which, through functioning, show obvious signs of deterioration. Point them out to the customer and recommend their
replacement.
5. Check the B+ voltage to see it is at the values specified.
6. Flexible Circuit Board Repairing
•Keep the temperature of the soldering iron around 270 °C during repairing.
• Do not touch the soldering iron on the same conductor of the circuit board (within 3 times).
• Be careful not to apply force on the conductor when soldering or unsoldering.
SAFETY-RELATED COMPONENT WARNING!!
COMPONENTS IDENTIFIED BY MARK 0OR DOTTED LINE WITH
MARK 0ON THE SCHEMATIC DIAGRAMS AND IN THE PARTS
LIST ARE CRITICAL TO SAFE OPERATION. REPLACE THESE
COMPONENTS WITH SONY PARTS WHOSE PART NUMBERS
APPEAR AS SHOWN IN THIS MANUAL OR IN SUPPLEMENTS
PUBLISHED BY SONY.
ATTENTION AU COMPOSANT AYANT RAPPORT
À LA SÉCURITÉ!
LES COMPOSANTS IDENTIFÉS PAR UNE MARQUE 0SUR LES
DIAGRAMMES SCHÉMATIQUES ET LA LISTE DES PIÈCES SONT
CRITIQUES POUR LA SÉCURITÉ DE FONCTIONNEMENT. NE
REMPLACER CES COMPOSANTS QUE PAR DES PIÈSES SONY
DONT LES NUMÉROS SONT DONNÉS DANS CE MANUEL OU
DANS LES SUPPÉMENTS PUBLIÉS PAR SONY.
CAUTION
Danger of explosion if battery is incorrectly replaced.
Replace only with the same or equivalent type.

1-2
ENGLISH JAPANESE
ENGLISH JAPANESE
DSLR-A900_L2
1-5. METHOD OF EXCHANGING FOCUSING SCREEN
1Remove two claws pushing part Abelow,
and remove focusing screen holder in the
direction of arrow.
3Confirm whether the point of the focusing
screen holder and the height of front frame
become complete after exchanging boards.
2Remove focusing screen.
Focusing Screen Holder
Focusing Screen HolderFront Frame
Focusing Screen
Claw Claw
A

1-3
ENGLISH JAPANESE
ENGLISH JAPANESE
DSLR-A900_L2
1-1. 各種薬品の取り扱いについて
現在使用されている薬品の中には揮発性の高い薬品もあります。
それらを不用意に取り扱い蒸発させてしまうと，環境や健康へ影響を与えたり，資源の無駄使いになります。
各種薬品は，下記の点に注意して取り扱ってください。
・ 保管場所を定め，高温になったり直射日光の当たらない場所に密閉して保管してください。
・ 小分け（ハンドラップ等）する数は必要最小限に留め，容器による自然蒸発を防いでください。
・ 作業に使用しない時は，必ずキャップ等をして自然蒸発を防いでください。
・薬品を使用する回数を極力少なくし，使用する場合は使用する量だけ容器より出して受け皿に残さないようにしてくだ
さい。
1-2. 樹脂系部品の取り扱いについて
本機に使用されている樹脂系の部品は，下記の点に注意して取り扱ってください。
・ 清掃には薬品を使用せず，清掃紙や清掃布を使用してください。
やむを得ず汚れがひどくて薬品を使用する場合は，シンナー，ケトン，エーテルは使用しないでください。
・ 各部品の取り付けには指定されたねじを使用し，部品に対して垂直に取り付けてください。
また，ねじを締め付ける時は，無理な力を加えないでください。
1-3. 無鉛半田について
本機には無鉛半田が使用されています。
無鉛半田を使用している基板には，無鉛（LeadFree）を意味するレッドフリーマークがプリントされています。
（注意：基板サイズによっては，無鉛半田を使用していてもレッドフリーマークがプリントされていないものがあります）
：レッドフリーマーク
無鉛半田は，下記の点に注意して使用してください。
・ 半田こてのこて先温度は約350℃に設定してください。
温度調節が無理な場合は，高温短時間で作業を行ってください。
注意： 半田こてを長く当てすぎると，基板のパターン（銅箔）がはがれてしまうことがありますので，注意してくださ
い。また，従来の半田よりも粘性が強いため，IC端子などが半田ブリッジしないように注意してください。
・ 半田こてのこて先は，必ず無鉛半田用と有鉛半田用に分けて管理してください。
無鉛半田と有鉛半田が混在すると剥離現象が発生してしまいます。
1. SERVICE NOTE

1-4
ENGLISH JAPANESE
ENGLISH JAPANESE
DSLR-A900_L2
1-4. SAFETYCHECK-OUT
サービス，点検時には次のことにご注意ください。
1. 注意事項をお守りください。
サービスのとき特に注意を要する個所については，キャビネット，シャーシ，部品などにラベルや捺印で注意事項を表
示しています。これらの注意書き及び取扱説明書等の注意事項を必ずお守りください。
2. 指定部品のご使用を
セットの部品は難燃性や耐電圧など安全上の特性を持ったものとなっています。
従って交換部品は，使用されていたものと同じ特性の部品を使用してください。
特に回路図，部品表に0印で指定されている安全上重要な部品は必ず指定のものをご使用ください。
3. 部品の取付けや配線の引きまわしはもとどおりに
安全上，チューブやテープなどの絶縁材料を使用したり，プリント基板から浮かして取付けた部品があります。
また内部配線は引きまわしやクランパによって発熱部品や高圧部品に接近しないよう配慮されていますので，これらは
必ずもとどおりにしてください。
4. サービス後は安全点検を
サービスのために取外したネジ，部品，配線がもとどおりになっているか，またサービスした個所の周辺を劣化させて
しまったところがないかなどを点検し，安全性が確保されていることを確認してください。
5. チップ部品交換時の注意
・取り外した部品は再使用しないでください。
・タンタルコンデンサのマイナス側は熱に弱いため交換時は注意してください。
6. フレキシブルプリント基板の取扱いについて
・こて先温度を270℃前後にして行なってください。
・同一パターンに何度もコテ先を当てないでください。（3回以内）
・パターンに力が加わらないよう注意してください。
注意
電池の交換は，正しく行わないと破裂する恐れがあり
ます。電池を交換する場合には必ず同じ型名の電池
又は同等品と交換してください。

1-5E
ENGLISH JAPANESE
ENGLISH JAPANESE
DSLR-A900_L2
1-5. 焦点板の交換方法
1A部を下に押してつめ2箇所を外し，
 矢印方向に焦点板ホルダを外す。
2焦点板を外す。
3焦点板を交換したあとは，焦点板ホルダの
 先端と前枠との高さが同じになっているか
 確認をする。
焦点板
焦点板ホルダ
つめ つめ
焦点板ホルダ前枠
A

2-1
DSLR-A900_L2
2. DISASSEMBLY
NOTE FOR REPAIR
• Make sure that the flat cable and flexible board are not cracked of bent at the terminal.
Do not insert the cable insufficiently nor crookedly.
• When remove a connector, don’t pull at wire of connector. It is possible that a wire is snapped.
•When installing a connector, don’t press down at wire of connector.
It is possible that a wire is snapped.
•Do not apply excessive load to the gilded flexible board.
Cut and remove the part of gilt
which comes off at the point.
(Be careful or some
pieces of gilt may be left inside)
SUBSIDIARY MATERIALS
G: Grease
G-15 (J-6082-619-A)
G-85 (J-6082-626-A)

2-2
DSLR-A900_L2
2-1. IDENTIFYING PARTS
Top Cover
⋅ TOP-004 Flexible Board
Rear Cover
Mirror Box
Jack Holder
⋅ FP-898 Flexible Board
Shutter
AF Module
Te b ure Unit
⋅ Omega Unit
⋅ FP-893 Flexible Board
⋅ FP-894 Flexible Board
Battery Holder
⋅ GY-009 Flexible Board
⋅ FP-896 Flexible Board
MM-079 Board
⋅ FP-890 Flexible Board
AF Assist
Light Block
DD-299 Board
⋅ FP-895 Flexible Board
MA-453 Flexible Board
AM-015 Board
Front Cover
Side Cover
2-2-2. MAIN BOARD SECTION
⋅AM-015 Board
2-2-3. OVERALL SECTION-2
⋅Te b ure Unit
⋅Front Cover
2-2-5. SHUTTER SECTION
⋅Shutter
⋅DD-299 Board
2-2-7. MIRROR BOX SECTION (PENTA UNIT)
⋅AF Module
⋅Penta Unit
2-2-4. SIDE FRAME SECTION
⋅MA-453 Flexible Board
⋅Bottom Frame
⋅Jack Holder
2-2-6. BATTERY HOLDER SECTION
⋅Battery Holder
⋅MM-079 Board
⋅GY-009 Flexible Board
2-2-8. MIRROR BOX SECTION (SUB UNIT-1)
⋅Iris Ring
⋅SLLK Contact Piece Unit
⋅BL Contact Unit
2-2-9. MIRROR BOX SECTION (SUB UNIT-2)
⋅Mirror Charge Motor Unit
⋅Aperture Unit
⋅AF Driving Unit
2-2-1. OVERALL SECTION-1
⋅Side Cover
⋅Rear Cover
⋅Top Cover
- DISASSEMBLY FLOW -

2-3
DSLR-A900_L2
2-2. DISASSEMBLY
2-2-1. OVERALL SECTION-1
Follow the disassembly in the numerical order given.
1Side Cover (1-1 to 1-3)
2Rear Cover (2-1 to 2-10)
3Top Cover (3-1 to 3-8)
HELP
HELP
EXPLODED VIEW
HARDWARE LIST
3-2 (#94)
3-5 (#94)
3-6
(#94)
3-8
(Claw)
3-7 (#94)
3-3 (#83)
3-4
3-1
2-1
2-2
(#94)
2-9
(#94)
2-10
2-5
(Open)
2-4
(#94)
2-6 (#94)
2-7 (#94)
2-8 (#12)
2-3
2Rear Cover
HELP 1 HELP 2
1-1
(Peel off)
1-2 (Open)
1-3 (#94)
1Side Cover
3Top Cover
Main Board
Section
(See Page 2-4)
Body Cap

2-4
DSLR-A900_L2
2-2-2. MAIN BOARD SECTION
Follow the disassembly in the numerical order given.
1AM-015 Board (1-1 to 1-24)
EXPLODED VIEW
HARDWARE LIST
AM-015
HELP 3
HELP 4
HELP 5
1-2 (#76)
1-1 (Open)
1-23
(#109)
1-3
1-4
1-5
1-15
1-16
1-17
1-18
1-19
1-20
1-21
1-22
1AM-015 Board
Overall Section-2
(See Page 2-5)
1-7
1-8
1-9
1-10
1-111-121-13
1-14
1-6
1-24
(#109)

2-5
DSLR-A900_L2
2-2-3. OVERALL SECTION-2
Follow the disassembly in the numerical order given.
1Te b ure Unit (1-1 to 1-9)
2Front Cover (2-1 to 2-7)
EXPLODED VIEW
HARDWARE LIST
2-1 (#94)
2-5 (#94)
2-7 (#12) 2-6
(#94)
2-3
2-4 (#83)
2-2
2Front Cover
HELP 6
HELP 8 G-15
HELP 7
1-2
1-1
1-8
1-4
1-3
(#109)
1-9 (#59) 1-7 (#59)
1-5 (#59)
1Te bure Unit
Side Frame Section
(See Page 2-6)
1-6 (#59)

2-6
DSLR-A900_L2
2-2-4. SIDE FRAME SECTION
Follow the disassembly in the numerical order given.
1MA-453 Flexible Board (1-1 to 1-8)
2Bottom Frame (2-1 to 2-4)
3Jack Holder (3-1 to 3-4)
EXPLODED VIEW
HARDWARE LIST
3-1
3-2
3-3
3-4 (#76)
2-3 (#76)
2-4 (#76)
2-1 (#109)
2-2 (#109)
2Bottom Frame
HELP 9 HELP 13
HELP 11
HELP 14
HELP 15
HELP 12
HELP 10
1-6
(#109)
1-4
1-1
1-8
1-7
1-5
1-2
1-3
1MA-453 Flexible Board
3Jack Holder
Shutter Section
(See Page 2-7)

2-7
DSLR-A900_L2
EXPLODED VIEW
HARDWARE LIST
2-2-5. SHUTTER SECTION
Follow the disassembly in the numerical order given.
1Shutter (1-1)
2DD-299 Board (2-1 to 2-8)
1-1 (#91)
2-1 (#76)
2-6 (#12)
2-7 (#109)
2-8
2-2
2-3
2DD-299 Board
1Shutter
Battery Holder Section
(See Page 2-8)
2-4
HELP 16
2-5
HELP 17

2-8
DSLR-A900_L2
EXPLODED VIEW
HARDWARE LIST
2-2-6. BATTERY HOLDER SECTION
Follow the disassembly in the numerical order given.
1Battery Holder (1-1 to 1-2)
2MM-079 Board (2-1 to 2-3)
3GY-009 Flexible Board (3-1)
1-1 (#76)
1-2 (#76)
3-1
(#109)
2-1 (#109)
2-2 (#76)
2-3
2MM-079 Board
1Battery Holder
3GY-009
Flexible Board
Mirror Box Section
(Penta Unit)
(See Page 2-9)

2-9
DSLR-A900_L2
EXPLODED VIEW
HARDWARE LIST
2-2-7. MIRROR BOX SECTION (PENTA UNIT)
Follow the disassembly in the numerical order given.
1AF Module (1-1 to 1-3)
2Penta Unit (2-1 to 2-4)
1-1 (#149)
1-2
1-3
2-1
2-2 (#89)
2-3 (#89)
2-4
2Penta Unit
HELP 18
HELP 19
HELP 20
1AF Module
Mirror Box Section
(Sub Unit-1)
(See Page 2-10)
Refer to page 1-2 "1-5. METHOD OF EXCHANGING FOCUSING
SCREEN" when focusing screen are exchanged.

2-10
DSLR-A900_L2
EXPLODED VIEW
HARDWARE LIST
2-2-8. MIRROR BOX SECTION (SUB UNIT-1)
Follow the disassembly in the numerical order given.
1Iris Ring (1-1 to 1-15)
2SLLK Contact Piece Unit (2-1 to 2-8)
3BL Contact Unit (3-1 to 3-2)
3-1 (#23)
2-1 (#91)
2-8 (#23)
2-2
2-3
2-4
2-5
2-6
2SLLK
Contact
Piece Unit
HELP 21
3BL Contact Unit
3-2
G-85
G-85
2-7
1Iris Ring
Refer to page 2-13 "2-4. IRIS RING
REMOVAL/INSTALLATION" when
the iris ring is exchanged.
Mirror Box Section
(Sub Unit-2)
(See Page 2-11)
1-8
1-9
1-7
1-10
1-14
1-15
1-13
1-11
1-1 (#89)
1-2 (#89)
1-5 (#89)
1-6 (#89)
1-3 (#89)
1-4 (#89)
1-12
Ver. 1.1 2009.01

2-11
DSLR-A900_L2
EXPLODED VIEW
HARDWARE LIST
2-2-9. MIRROR BOX SECTION (SUB UNIT-2)
Follow the disassembly in the numerical order given.
1Mirror Charge Motor Unit (1-1 to 1-5)
2Aperture Unit (2-1 to 2-4)
3AF Driving Unit (3-1 to 3-5)
1-4 (#23)
1-5 (#23)
1-1
1-3
1-2
3-1 (#23)
3-2 (#23)
3-4 (#23)
2-1 (#23)
2-2
2-3
2-4
3-3
3-5
2Aperture Unit
HELP 22
HELP 23
HELP 26
HELP 24 HELP 25
Refer to page 2-13 "2-5. APERTURE
UNIT INSTALLATION" when the
aperture unit is exchanged.
1Mirror Charge Motor Unit
3AF Driving Unit

2-12
DSLR-A900_L2
2-3. IMAGER INCLINATION ADJUSTMENT
Checking Method
1. Use the copy stand or place a mirror on the wall, and adjust the accuracy so that the camera is opposed to the mirror.
2. Use the AE master lens as an inspection lens.
3. Obtain the inclination angle with the Photoshop, and perform as follows according to the angle:
• For the angle above ±0.4 degree, be sure to repair the camera.
• For the angle above ±0.2 degree and below ±0.4 degree, repair the camera according to the user's requirement level.
• For the angle below ±0.2 degree, check again the angle to satisfy the specified value.
Adjusting Method
1. Loosen the fixed screw.
2. Adjust the inclination with the adjusting screw.
• For an image that tilts to the right, rotate the screw clockwise.
• For an image that tilts to the left, rotate the screw counterclockwise.
3. Tighten the fixed screw.
Imager Inclination Adjusting Screw
Adjusting Screw
Fixed Screw

2-13
DSLR-A900_L2
2-4. IRIS RING REMOVAL/INSTALLATION
Removal
Rotate the iris ring clockwise, and remove it at the stop position (iris-in end).
At this time, do not rotate the iris joint gear of the Aperture Unit.
Installation
1. With the Aperture Unit set in the charge position (see "2-6. Aperture Unit Charge Position Setting" ), install it on the front
frame set.
*The Aperture Unit has been set in the charge position, if it is not removed.
However, the iris ring must be in the removed state (where the iris joint gear is not rotated).
2. Install the iris ring with it's a punch mark aligned with a line that connects the iris joint gear shaft and the optical axis center.
2-5. APERTURE UNIT INSTALLATION
*The Aperture Unit is supplied by being set in the charge position (initial position), but if this position is disordered when the
Aperture Unit is removed, or if the charge position is to be set again, perform as follows.
*Refer to "2-6. Aperture Unit Charge Position Setting" for the confirm method at the charge position.
2-6. APERTURE UNIT CHARGE POSITION SETTING
1. Check that the Aperture Unit is in a free state.
2. After confirming that the Aperture Unit is in a free state, rotate the gear by 3 turns.
3. After rotating the gear by 3 turns, set the Aperture Unit where the holes in the gear and the Aperture Unit coincide. This
position is the charge position.
*Refer to "2-7. Aperture Unit Free Position Setting" for the setting and the confirm method at the free position.
Iris Ring
Optical Axis Center
Iris Joint Gear Shaft
Punch Mark