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2-10

DSLR-A900_L2

Follow the disassembly in the numerical order given.

1

Iris Ring (

1

-1 to 

1

-15)

2

SLLK Contact Piece Unit (

2

-1 to 

2

-8)

3

BL 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

2

SLLK
Contact
Piece Unit

3

BL Contact Unit

3

-2

2

-7

1

Iris Ring

Mirror Box Section
(Sub Unit-2)

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

2-11

DSLR-A900_L2

Follow the disassembly in the numerical order given.

1

Mirror Charge Motor Unit (1-1 to 1-5)

2

Aperture Unit (2-1 to 2-4)

3

AF 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

2

Aperture Unit

1

Mirror Charge Motor Unit

3

AF Driving Unit

2-12

DSLR-A900_L2

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.

Adjusting Screw

Fixed Screw

2-13

DSLR-A900_L2

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.

* 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.

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