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DSC-W520

3-12

REAR LENS
SPRING

FOCUSING
SHAFT ASSY

REAR LENS 

Engaged 

13. Hook the FOCUSING SHAFT ASSY and the REAR LENS SPRING to the REAR LENS as a unit as shown in the

figure. Then engage the unit with the certain groves of the FIXED BARREL as shown in the figure.

The end-loop of 
REAR LENS SPRING 

 

COVER TAPE

Hooked part for 
Zoom drive 

14. Hook the end-loop of REAR LENS SPRING. Then attach the COVER TAPE.

15. Turn the long gear clockwise to set the block in the retracted state. Then attach the hooked part for Zoom drive.

DSC-W520

3-13

2ND FOCUS GEAR

ZOOM LONG GEAR

REAR RETAINER 

(*) ECCENTRIC BUSH

Aligning is possible by turning it if the 
result of [Focus check] is NG level in the 
"4. Checking and judging" page 3-15.

16. Install the 2ND FOCUS GEAR and the ZOOM LONG GEAR.

17. Install the REAR RETAINER.

(*) Confirm whether the ECCENTRIC BUSH is there or not.

18. Install the four screws.

To retract, apply a positive 
supply voltage (+) here.

To Tele, apply a positive 
supply voltage (+) here. 

19. Install the two screws.

20. Solder the connection.

21. To test the assembly, apply a voltage of 2.5 V for DC to the zoom motor.

DSC-W520

3-14

Mirror

Dust check

1. Viewing from the front lens

No visible dust inside the lens.

2. Shooting check 

2-1. Shoot the object with following conditions

- Object should be perfect white high brightness object. (Example; PTB1450 clear chart, etc)
- Shoot above object from a few centimeters with Pixel; Maximum size and Tele end.

2-2. Check the image on PC. Image should have no dust.

Focus Check

1. Preparation

- Camera installed re-assemble lens
- Test camera for comparing
- Chart (Printed PDF file at the same magnification)
- Tripod 
- Mirror (ex. CD)
- Memory Stick
- PC

2. Setting up to shoot

2-1. Paste the chart.

- Chart should be on the flat wall.
- Illuminance level in the chart should be the same.
- Make the tripod’s height and the center of the chart to the same 
height.

- Enough space needed for shooting

2-2. Set up the camera as follows;

- [P] mode
- [Maximum] size
- ISO lowest level
- Steady Shot [OFF]
- Flash [OFF]

2-3. Attach the camera on a tripod.

2-4. Align the positions of the camera and the chart as follows;

2-4-1. Set the zoom position of the camera at Wide end.
2-4-2. Attach the mirror(*) onto the center of the chart.

(*) The mirror should not tilt on the chart.

 

 

LCD display

2-4-3. Move(*) the camera with the tripod to display the chart on LCD as the following picture.

(*) Avoid the tilt of the camera face against the chart.

2-4-4. Align the camera position(*) to the center of the chart.

(*) Adjust the position of the tripod vertically and horizontally with referring to the reflected image.

2-4-5. Reconfirm the conditions of 2-4-3. and 2-4-4. If OK, remove the mirror.

3. Shooting 

3-1. Set to [Self-Timer] mode.
3-2. Take the shot by the camera installed re-assemble lens.
3-3. Take the shot by the test camera for comparing with the same condition.

Display the frame* like in this 
picture.
* Whole square frame should 
be displayed.  

 

Refer to the reflected image in the mirror.
Adjust the position so that the center of Lens part 
overlaps with the center of the chart.

DSC-W520

3-15

4. Checking and judging

4-1. Check the shot images on PC.

- Display at the same magnification of its Pixel. (100% display)

4-2. Compare the images by the repaired camera and the test camera.

- There should not be extreme focus blurring
- It should be distinguished the black and white by the sharpness between them.
- If it is in NG level, replace the lens unit.

 

Check the five parts (center and 4 surrounding areas) at the same magnification.

NG level or Out of focus

OK level

Center

OK level

NG level

Limit of OK level

Surrounding areas

Images for judjing