Nidek Medical AR-600 User manual

MAR10*RDA004A/E
Total Page 5 2
2002.03
NIDEK
AUTO REF/KERATOMETER
AR-600/ARK-700 SERIES
SERVICE MANUAL
(For adjustment)

I
T
Ta ab bl le e o of f C Co on nt te en nt ts s
§
1PRECAUTIONS ........................................................................................................... 1-1
§
2TROUBLESHOOTING ............................................................................................... 2-1
§
3SUB TROUBLESHOOTING ...................................................................................... 3-1
3.1 Can Not Perform the AR Measurement Normally....................................................3-1
3.2 Can Not Perform the KM Measurement Normally...................................................3-2
§
4ADJUSTMENT ............................................................................................................. 4-1
4.1 Optical Axis Adjustment of Phototransmitter /Photoreceptor ..................................4-1
4.2 Optical Axis Adjustment of Chart ............................................................................4-3
4.3 Three-Point Relation among SPD, Mask and LED ..................................................4-6
4.3.1 Check of three-point relation among SPD, mask and LED.............................4-6
4.3.2 Perpendicular adjustment of SPD and mask photoreceptors ...........................4-8
4.3.3 Tilt adjustment of LED lights and mask photoreceptor...................................4-9
4.3.4 LED adjustment in the middle.......................................................................4-10
4.3.5 Check after adjustment of three-point relation
among SPD, mask and LED..........................................................................4-11
4.4 Position Adjustment of Reticle and LED lights......................................................4-12
4.5 CYL Value Adjustment ..........................................................................................4-12
4.5.1 When the height of the side-by-side waveform is different...........................4-13
4.5.2 Optical axis adjustment of phototransmitter/ photoreceptor system
in horizontal direction ...................................................................................4-14
4.5.3 Optical axis adjustment of phototransmitter/ photoreceptor system
in vertical direction........................................................................................4-16
4.5.4 Check after waveform adjustment .................................................................4-17
4.6 Measurable Range Adjustment ...............................................................................4-18
4.7 SPH Value Calibration............................................................................................4-18
4.8 AR AXIS Adjustment .............................................................................................4-20
4.9 Microcoria Check....................................................................................................4-20
4.10 IOL Check.............................................................................................................4-21
4.11 Chart Calibration...................................................................................................4-21
4.12 Internal Reflection Check .....................................................................................4-22
Page

II
4.13 KM Optical Axis Adjustment ...............................................................................4-23
4.14 KM Calibration .....................................................................................................4-29
4.15 KM AXIS Check and Correction..........................................................................4-30
4.16 Tilt Adjustment of Chart.......................................................................................4-31
4.17 PD Adjustment......................................................................................................4-31
4.18 Auto-Tracking Adjustment ...................................................................................4-33
4.19 Auto-Shot Adjustment ..........................................................................................4-34
4.20 Chart Calibration/CYL Lens Adjustment .............................................................4-35
§
5REFERENCE ................................................................................................................ 5-1
5.1 DIP Switch Function Table.......................................................................................5-1
5.2 Error Code Table.......................................................................................................5-2
5.3 Switch Operation at Power ON.................................................................................5-3

§
1
P
RECAUTIONS
・This manual describes the adjustment method of the NIDEK AR-600/ARK-700 series.
・This manual is intended for references of engineer training and adjustment by trained
personnel.
・Only qualified personnel who received the necessary training should perform repair and
adjustment of the system.
Others must not make the adjustment. Otherwise, an accident or a failure may result.
・If a malfunction occurs, turn the system off after checking the symptom.
・Be careful not to drop the metallic parts such as a removed screw and parts into the system.
・If the screw with a threadlocker is loosened, apply a threadlocker again before tightening
the screw.

§
2
TROUBLESHOOTING
No
Ye s
No
Ye s
No
Ye s
No
Ye s
Turn the system on. Does the
initialization start without the Err at
the startup?
(The Err appears at the AR or KM
measurement, or the measured value is
out of the standard.)
Perform the AR measurement with a
model eye and a human eye.
Can the AR measurement be
performed normally?
A board etc. may fall because of the
malfunction other than the
adjustment.
Repair the system according to the
AR-600/ARK-700 series Service
Manual (No. MAR10RTZ001).
3.1 Can Not Perform the AR
Measurement Normally.
Perform the KM measurement with a
KM steel ball.
Can the KM measurement be
performed normally?
3.2 Can Not Perform the KM
Measurement Normally.
Measure the model eye while the auto-
tracking function is on.
Does the auto-tracking function work
normally?
Perform the auto-tracking adjustment.
(See 4.18.)

2 - 2
No
Ye s
No
Ye s
No
Measure the model eye while the auto-
shot function is on.
Does the auto-shot function work
normally?
Adjust the auto-shot function.
(See 4.19.)
Perform the chart calibration.
(See 4.11.)
(As for the AR-660A/ARK-760A, see
4.20.)
Does the chart work normally at the
AR or KM measurement? (Pressing
the start button brings the chart into
focus. Then the view is fogged
automatically.)
Perform the PD adjustment.
(See 4.17.)
Measure a PD.
Is the measured PD within the
standard?

§
3
SUB TROUBLESHOOTING
Yes
No
3.1 Can Not Perform the AR Measurement Normally.
Check and perform the adjustment in
the following order.
4.3 Three-Point Relation among
SPD, Mask and LED
(* When the three-point relation
is misaligned widely in the item
4.3, perform the adjustment in
the order of 4.1 →4.2 →4.3.)
4.5 CYL Value Adjustment
4.6 Measurable Range Adjustment
4.7 SPH Value Calibration
4.8 AR AXIS Adjustment
4.9 Microcoria Check
4.10 IOL Check
4.11 Chart Calibration
4.12 Internal Reflection Check
4.18 Auto-Tracking Adjustment
4.19 Auto-Shot Adjustment
Measure the model eye.
Can the measure be performed even if
the measured value is out of the
standard?
The SPH value is out of the standard.
→Perform the SPH calibration.
(See 4.7.)
The CYL value is out of the standard.
→Check and repair the system in the
following order.
4.5 CYL Value Adjustment
4.6 Measurable Range Adjustment
4.7 SPH Value Calibration
4.8 AR AXIS Adjustment
4.9 Microcoria Check
4.10 IOL Check
4.11 Chart Calibration
4.12 Internal Reflection Check
4.18 Auto-Tracking Adjustment
4.19 Auto-Shot Adjustment

3 - 2
Yes
No
3.2 Can Not Perform the KM Measurement Normally.
Can the KM measurement be
performed?
The KM measurement can be
performed, but the measured value is
out of the standard.
→Perform the KM calibration.
(See 4.14.)
The KM optical axis is misaligned.
Check and adjust it in the following
order.
4.13 KM Optical Axis Adjustment
4.14 KM Calibration
4.15 KM Axis Check and Correction

§
4
A
DJUSTMENT
4.1 Optical Axis Adjustment of Phototransmitter
/Photoreceptor
[Optical axis check of phototransmitter/photoreceptor]
1. Attach a lamp in front of the SPD holder to illuminate the photoreceptor.
2. Put a piece of white paper in front of the LED.
3. Attach the optical axis adjustment jig (ARMJ-7).
4. Turn the SPD holder to make the photoreceptor horizontal.
5. If the positions of the photoreceptor and
aperture are not as the right figure shows,
perform the [Optical axis adjustment of
phototransmitter/photoreceptor].
[Optical axis adjustment of phototoransmitter/phototreceptor]
First, align the photoreceptor height.
1. Turn the holder of G13 to align the photoreceptor height at –12D with the aperture.
* See Figure on page 4-3 for the –12D position.
Aperture
Photoreceptor
Aperture
Holder of G13
Holder of G8+G9+G10
A piece of
white paper
SPD holder
Optical axis
adjustment jig
Lamp
Photoreceptor

4 - 2
2. Turn the holder of G8+G9+G10 to align
the photoreceptor height at +12D with the
aperture center.
3. Repeat Step 1 and 2 to align the
photoreceptor height with the aperture
center.
[Adjustment of photoreceptor in horizontal direction]
1. Turn the SPD holder 90º to make the photoreceptor vertical.
2. Move G13 to make a horizontal alignment
of the photoreceptor at +12D and –12D
with the aperture.
* Turn G13 at –12D and move parallel at
+12D.
3. Repeat Step 2 until the photoreceptor is
horizontally aligned with the aperture
center.
[Important]
1. Tighten the set screws (n=3) on the top of G13 holder
evenly, paying attention to the displacement in the
horizonal direction.
2. If there is a displacement in the vertical direction,
make an adjustment by turning G13 holder again.
3. G13 is not out of the holder.
4. Turn the SPD holder and make sure that
the photoreceptor is always at the aperture
center.
Photoreceptor
Aperture
At +12D
At –12D

4 - 3
4.2 Optical Axis Adjustment of Chart
[Optical axis check of chart]
1. Attach the illumination jig in front of the SPD holder to illuminate the photoreceptor.
2. Put a piece of white paper in front of the measuring LED.
3. Attach the optical axis adjustment jig (ARMJ-7).
4. Set the DIP switch No.4 to the ON position and turn the system on.
5. Press (IOL button).
6. Look into G8+G9+G10 through the –12D magnifier and move the sensor carry until the
chart is focused.
<Reference>
• Where both the chart and aperture of the sensor carry are focused, looking into G8+9+10
with the naked eye. 0D position
• Where both the chart and aperture of the sensor carry are focused, looking into G8+9+10
with the +012D magnifier. –12D position
• Where both the chart and aperture of the sensor carry are focused, looking into G8+9+10
with the –12D magnifier. +12D position
G8+G9+G10
G6+G7
+12D
–12D 0D
Sensor carry
3130 (chart)

4 - 4
When adjusting the optical axis of the chart, adjust the chart in vertical direction.
[Adjustment of chart in vertical direction]
1. Turn the holder of G6+G7 to align the chart height at +12D and –12D with the aperture
center.
* Check at 0D posiiton, as well.
Adjust the chart in horizontal direction.
[Adjustment of chart in horizontal direction]
1. Move G6 + G7 parallel as the right figure
shows to align the chart at –12D with the
aperture center.
2. Turn G6 + G7 as the right figure shows to
align the chart at +12D with the aperture
center.
Repeat Step 1 and 2 until the chart is horizontally aligned with the aperture center.
G6 + G7
Chart Aperture
G6+G7
Aperture
Chart

4 - 5
[Important]
1. When G6 + G7 is fixed with set screws, there may be a displacement in both vertical and
horizontal directions.
In such a case, tighten the screws paying attention to the horizontal direction and turn the
holder again if there is a displacement in the vertical direction.
2. The screws (n=3) retaining G6 + G7 shall be tightened evenly.
3. The prism of G6 + G7 is not out of the front of the holder.
3. Move the entire chart unit until the balloon center is placed within 1/4 of the aperture.

4 - 6
4.3 Three-Point Relation among SPD, Mask and LED
4.3.1 Check of three-point relation among SPD, mask and LED
1. Remove the shield plate.
* The right figure shows ARK-700 series.
In the AR-600 series, the shield plate is
removed in the same manner.
2. Remove the LED base L.
* The right figure shows ARK-700 series.
In the AR-600 series, the LED base L is
removed in the same manner.
3. Attach the optical axis adjustment jig
(ARMJ-7) on the measuring unit with
PC4×14.
* Remove the cable cramp.
* Attach the jig so as not to crush the cable.
* Adjust the length of the arm by pushing or
pulling the arm so that two magnifiers and
the mire (measuring window) will be placed
in a straight line.
* The front one is a magnifier of the + power.
4. Remove EA15 (chart LED) on 3130
(chart).
* The SPD photoreceptor cannot be seen
unless the chart LED is turned off.
* The chart LED is used for illuminating the
SPD photoreceptor.
* If the SPD photoreceptor is illuminated by a
pen light, etc., you may disconnect J17 on
the PC6 board to turn off the chart LED.
5. Set the chart LED removed in the previous
step in front of the SPD photoreceptor with
a tape, etc.
* Illuminating the SPD photoreceptor allows
you to see an element easily.
* If it is hard to see with the chart LED, use a
pen light, etc.
LED base L
Shield plate Mire
Optical axis adjustment jig
Chart LED
SPD photoreceptor
Chart LED

4 - 7
In Step 6 and 7, make sure that the SPD and mask
photoreceptors are perpendicular as the right
figure shows.
6. Set the sensor plate on 5047 (SPD unit) at
the 0º position (top).
* The mask photoreceptor can be seen by
looking into G6 + G7 with the naked eye.
7. Move 5035 (sensor carry) to the + side to
bring the SPD photoreceptor into focus.
* Look into G6 + G7 with the naked eye and
make sure that the SPD and mask
photoreceptors are perpendicular.
When the SPD and mask photoreceptors are not perpendicular, perform “4.3.2 Perpendicular
adjustment of SPD and mask photoreceptors”.
Look into 1651 (G6+G7) with naked eye.
+ side
– side
Sensor carry
SPD photoreceptor
Mask photoreceptor
Turn the SPD unit in the direction of the arrow.
0º
90º
180º

4 - 8
4.3.2 Perpendicular adjustment of SPD and mask photoreceptors
1. Loosen HH3×4 (n=2) retaining 5041 (timing pulley).
* The SPD unit and mask unit turn seperately.
2. Set the shutter on 5047 (SPD unit) at the 0º position (top).
3. Turn the mask unit so that the SPD and
mask photoreceptor will be perpendicular.
4. Tighten HH3×4 (n=2) retaining 5041
(timing pulley).
When the SPD and mask photoreceptors become to be perpendicular, attach the LED adjustment
jig (RKDJ-1) to make sure that the LED lights are parallel to the mask photoreceptor.
* If the LED adjustment jig (RKDJ-1) is not
available, it may use the optical axis adjustment
jig (ARMJ-7).
When the LED lights are not parallel to the mask photoreceptor, perform “4.3.3 Tilt adjustment
of LED lights and mask photoreceptor”.
HH3×4 (n=2) retaining timing pulley
Mask unit
LED lights are parallel to mask photoreceptor.
HH35B
SB3IB
LED adjustment jig (RKDJ-1)

4 - 9
4.3.3 Tilt adjustment of LED lights and mask photoreceptor
1. Set the DIP switch No.4 and No.5 on the
PC1 board to the ON position.
2. Turn the power switch on and press
(IOL button).
Press the START button on the joystick to
place the system in “Test mode 1”.
3. Put a piece of white paper between 5035
(sensor carry) and 5043 (relay lens).
* The paper must be tilted so that reflected
light will come into the mask unit.
* The white paper makes it easy to see the
mask photoreceptor.
* This adjustment can be made by attaching
EA15 (chart LED lamp) on 5043 (relay
lens).
4. Draw out the + power magnifier of the
optical axis adjustment jig (ARMJ-7)
about 10 cm and look into G8+G9+G10.
Check the position of the LED lights and
mask photoreceptor.
* The position to be seen differs from the
indivisual eyesight.
5. Loosen HH3×4 (n=2) which hold 3110
(LED).
* It makes SPD and LED turn seperately and
only LED lights turns.
6. Look into G8+G9+G10 with the + power
magnifier of the optical axis adjustment jig
(ARMJ-7) and turn 3110 until the LED
lights are parallel to the mask
photoreceptor.
7. Tigten HH3×4 (n=2) retaining 3110 (LED).
HH3×4(n=2) retaining LED
Put a piece of white paper.
LED light
Mask photoreceptor
LED lights are not parallel to mask photoreceptor.
LED lights are parallel to mask photoreceptor.

4 - 10
When the LED lights has become to be parallel to
the mask photoreceptor, make sure that the LED
lights are positioned in the middle of the mask
photoreceptor as the right figure shows.
If not, perform “4.3.4 LED adjustment in the
middle”.
4.3.4 LED adjustment in the middle
1. Loosen PC3×8 (n=2) retaining 5065 (mask
unit).
2. Set the sensor plate on 5047 (SPD unit) to
the 90º position (left side).
3. Look into G8+G9+G10 with the + power
magnifier of the optical axis adjustment jig
(ARMJ-7) and move 5065 (mask unit) to
the right or left side so that the LED lights
will be positioned in the middle of the
mask photoreceptor.
* Then, be sure not to fail the parallel
adjustment of the LED lights by turning the
mask unit.
4. Turn 5047 (SPD unit) from 0º to 180º and
make sure that the LED lights are always
positioned in the middle of the mask
photoreceptor.
5. Tighten PC3×8 (n=2) retaining 5065 (mask
unit).
Screw retaining mask unit
LED lights are out of the middle of mask photoreceptor.
LED light Mask photoreceptor
LED lights are in the middle of mask photoreceptor.
LED lights are in the middle of mask photoreceptor.

4 - 11
After “4.3.2 Perpendicular adjustment of SPD and mask photoreceptors”, “4.3.3 Tilt adjustment
of LED lights and mask photoreceptor” and “4.3.4 LED adjustment in the middle”, perform
“4.3.5 Check after adjustment of three-point relation among SPD, mask and LED”.
4.3.5 Check after adjustment of three-point relation among
SPD, mask and LED
1. Turn 5047 (SPD unit) from 0º to 180º and make sure that the following conditions are
met at all times.
When all conditions are met, the relation among SPD, mask and LED is normal.
• The SPD and mask photoreceptors are
perpedicular.
• LED lights are parallel to the mask
photoreceptor.
• LED lights are positioned in the middle of
the mask photoreceptor.
If only the one of conditions is not met,
perform the adjustment from 4.3.1 to 4.3.4
again.
2. Make sure that the following three
requirements are met.
• 5047 (SPD unit) is at the 0º position (top).
• Operation amplifier of 5065 (mask unit) is
top.
• Set screw (TG2×3) of 3110 (LED) is top.
3. Loosen PC3×8 (shaft mounting screw)
(n=2) to move the shaft up and down and
then adjust the tension of the belt.
* Make this adjustment when 5065 (mask
unit) is moved.
Moving 5065 (mask unit) changes the
tension of the belt.
* The belt shall be sagged by 3 - 5 mm when
pressed with 50 - 150g.
* Adjust the tension with 5047 (SPD unit) at
the 180º position. Shaft mounting screw
Belt
Operation amplifier is top.
LED light Mask
photoreceptor
SPD unit is 0º or 180º.
SPD unit is 90º.