IMG_6476

Need Your NIDEK Marco 700A Repaired?

Tell us what’s wrong with your unit– we’ll arrange picking it up, and repair it back to factory specifications. Although your instrument may no longer be supported by the manufacturer, we produce a variety of original parts to ensure future service for the lifetime of your instrument.

 

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When calibration can not be achieved properly by adjusting the variable resistors on the PC6 board, it is necessary to perform calibration by adjusting the focus of CCD camera lens.

  1. Measure the Model eye of 0D and verify that the obtained data equals to the model eye base value. If not, adjust VR2 (S.ZERO) on the PC6 board.
  2. Measure the model eyes of page108image2460049610D and +10D. Check the difference between the obtained data and Model eye base value.
  3. If all the data obtained by measuring model eyes of any diopter is higher than the calibration value as shown on the right graph, turn the CCD camera lens clockwise.
  4. If all the data obtained by measuring model eye of any diopter is lower than the calibration value as shown on the right graph, turn the CCD camera lens counterclockwise.
  5. Adjust the TV camera lens properly so that the data distribution forms a straight line on the graph. Adjust GAIN (gradient) on VR1 (S. GAIN) on the PC6 board.
  6. Tighten the screw (HH3 × 4) after the adjustment work of camera lens.

  1. Set Switch 4 of the switchpack to the ON position.
  2. Press and place the instrument in the OTHER ADJUST MODE 10-0.
  1. Align the frame of the model eyes to the measuring point and adjust the focus of two measurement light LEDs.
  2. Move the target square to the right and left with and to position it between two LEDs.
  3. Turn the Rotator 90°
  4. Press the Start button to place the instrument in the MODE 10-2.
  5. Move the target square up and down to position between two LEDs.

If only the obtained SPH data is abnormal after replacing the PC6 board, perform sensor calibration by adjusting VR1 and VR2 on the PC6
board. However, the calibration work should be performed only in conditions where sensor OFFSET is normal and the focus of the camera lens are achieved properly.

If CYL data is too high and SPH data is abnormal due to other reasons, correct the erroneous state first. If not, the measured data may be
unreliable instead.

  1. Remove the Left and Right covers.
  2. Attach the Model eyes (three steel balls) to the Forehead rest and turn ON the Power Switch.
  3. Adjust the VR2 (S.ZERO) on the PC6 board so that the measured data of 0D model eye (the center one) equals to its base value.
  4. Adjust the VR1 (S.GAIN) on the PC6 board so that the measured data of + and – 10D model eyes (the left and right ones) equal to their base value.

  1. Set the Model eyes to the Forehead Rest.Clean the steel balls and measuring window before calibration.
  2. Turn the Power switch ON.
  3. Set Switch 4 of the switchpack to the
    ON position. Press page112image24594256to place the instrument in the KM calibration mode.
  4. Press page112image24597376. The display as shown on the right figure appears.
  5. Align the steel ball of R7.94mm to the center of the TV monitor and then press the Start button. KM measurement will take place 10 times in a row automatically. The display on the right figure appears.
  6. Align the steel ball of R5.95mm to the center of the TV monitor and then press the Start button. KM measurement will take place 10 times in a row automati cally. The display on the right figure appears.
  7. Align the steel ball of R9.13mm to the center of the TV monitor and then press the Start button. KM measurement will take place 10 times in a row automatically. The display on the right figure appears.
  8. Verify that the measurement results are within the following tolerances:R1 ± 0.02mmR2 ± 0.02mm
  9. If the measurement results are out of the tolerances, check to see that the steel ball is aligned precisely to the center of the TV monitor and perform auto-calibration again.
  10. If the desired results cannot be obtained by repeating the calibration several times, it is necessary to adjust the optical axis for KM measurement again.
  11. Set Switch 4 of the switchpack to the OFF position.

 

  1. Place the instrument in “MODE 17-0” with the Start button.
  2. Adjust the vertical position of the fiducial line and guide line with and page120image24631392.
  3. Change the mode to “MODE 17-1” with the Start button.
  4. Adjust the vertical position of the fiducial line and guide line with and page120image24627648
  5. Change the mode to “MODE 17-2” with the Start button.
  6. Move the guide line to the left or right with page120image24627232 and page120image24632848, and position it 12mm to the fiducial line right so that the 12mm of the guide line is aligned with 12mm of the guide line eye.
  7. Change the mode to “MODE 17-3” with the Start button.
  8. Change spacings between scales of the guide line with page120image24627232and page120image24625984, and align the 10 – 14mm scales with the ones of the model eye scale.
  9. Return the mode to“MODE17-0”with page120image24628688.

<Adjusting CS>

  1. Place the instrument in “MODE 18-0” withthe Start button.
  2. Adjust the vertical position of the fiducial line and guide line with page121image24535792and page121image24530176.

3. Change the mode to “MODE 18-1” with the Start button.

  1. Adjust the vertical position of the fiducial line and guide line with page121image24539536and page121image24530592.
  2. Change the mode to “MODE 18-2” with the Start button.
  3. Move the guide line to the left or right with and page121image24528720, and position it 5mm to the fiducial line right so that the 5mm scale of the guide line is aligned with the one of the model eye scale.
  4. Change the mode to “MODE 18-3” with the Start button.
  5. Change spacings between scales of the guide line with page121image24531216and page121image24532464, and align the 1 – 10mm scales with the ones of the model eye scale.
  6. Return the mode to“MODE18-0”with page120image24628688.