Nikon Coolpix 8700 Repair Manual page 29

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Operational / Resolution inspections

　Whenever the lens unit is disassembled or repaired, be sure to make an inspection.

(1) Operational inspection

(a) Connect the connector "A part" of self-made lens-barrel inspection tool （Page L17）to the lens-barrel

FPC of the lens-barrel unit.

(b) Turn the power ON to drive the zoom, then after zooming, turn the power OFF; Repeat this operation

several times.

If there is no operational problem after the above inspections, detach the lens-barrel unit from the

self-made inspection tool. Then after assembling it into the body, make the following inspection on

resolving power.

(2) Resolution inspection

Take a shot of ITE high-resolution chart (J63079) and check if the number of TV lines is within standard.

Standard TV lines: 1450 or more TV lines in the center; 900 or more TV lines in periphery

（Ref. The resolution is represented by the total number of black and white stripe lines, in the unit of "TV

lines", which are visible on TV screen.）

(a) Set the camera as follows. Shooting mode: P, Image quality: FINE, Image size: FULL, Speedlight: Flash

cancel

(b) Although the illumination irregularity on chart does not affect, take a shot with luminance for full

aperture (ISO100, 1/15 ～ 1/250).

WIDE (about 0.6 m), MIDDLE (about 1.25m), and TELE (about 4.0 m) , and adjust so that the chart can

be fully placed within the LCD. Then mount the camera on the tripod firmly.

(d) Open the shot image with Photoshop, and magnify it by zooming to 100% for checks.

(e) Check if the resolution marked in 4 red circles each for the center and the peripheral 4 corners of the

frame can be visible in black and white.

In case either (1) or (2) shows problems, it is necessary to replace the lens-barrel unit with the new one.

TE high-resolution chart (4:3 reflect) (J63079)

- A9 ･ E8700 -

VAA26001-R.3627.A

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