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Nidek Medical ARK-760A User Manual

Nidek Medical ARK-760A
165 pages
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NIDEK
AR-600/ARK-700 SERIES
SERVICE MANUAL
FOR AR-600 ARK-700
AR-600A ARK-700A
AR-660A ARK-760A
MAR10*RTZ001C/E
Total Page: 164
2003. 12

Table of Contents

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Nidek Medical ARK-760A Specifications

General IconGeneral
TypeAuto Ref/Keratometer
Minimum Pupil Diameter2.0 mm
Display5.7-inch color LCD
PrinterBuilt-in thermal printer
Power SupplyAC 100-240 V, 50/60 Hz
Measurement Range (Keratometry)33.00 to 67.50 D
Axis1° to 180°
Measurement ModeAuto / Manual
Measurement Range (Cylinder)0 to ±10.00 D
Pupil Diameter Measurement Range2.0 to 9.5 mm

Summary

Caution

Check Flows and Items to be Checked

Flowchart for diagnosing issues and listing items to check for operational problems.

Troubleshooting

TV Monitor Display Issues

Troubleshooting steps for no display or abnormal display on the TV monitor.

Err Messages After Power On

Diagnosing and resolving 'Err' messages that appear after turning on the power.

Err 1 Sensor Carry Error

Troubleshooting specific 'Err 1' indicating a sensor carry malfunction.

Err 2 Chart Carry Error

Diagnosing and resolving 'Err 2' related to the chart carry mechanism.

Err 3 Rotator Error

Troubleshooting steps for 'Err 3' indicating a problem with the rotator.

Err 4 Chart Error

Resolving 'Err 4' which signifies a chart-related error.

Err 5/Err 6 CL1/CL2 Error

Troubleshooting 'Err 5' (CL1) and 'Err 6' (CL2) errors for cylinder lens sensors.

Err 7 Line Printer Error

Diagnosing and fixing 'Err 7' related to the line printer operation.

Err 8 Serial Printer Error

Troubleshooting 'Err 8' for issues with the serial printer.

Err 9 EEPROM Memory Failure

Resolving 'Err 9' indicating a memory failure in the EEPROM.

Err A RAM Memory Failure

Troubleshooting 'Err A' for memory failure in the RAM.

PD ERR Display

Diagnosing and resolving 'PD ERR' messages during measurements.

Shutter Does Not Open

Troubleshooting the AR-600 shutter failing to open for early models.

Raster Does Not Appear

Diagnosing why the raster is not visible or the TV monitor is not lit.

Eye Image Does Not Appear

Troubleshooting the absence of an eye image on the TV monitor.

Unclear Characters or Target

Resolving issues with unclear or missing characters/targets on the TV monitor.

Manual/Auto-Tracking Mode Switching Issue

Troubleshooting failure to switch between manual and auto-tracking modes.

Cannot Enter Objective Measurement Mode

Resolving inability to place the instrument in objective measurement mode.

Parameter Settings Unchangeable

Troubleshooting issues where parameter settings cannot be modified.

Measuring Mode Unchangeable

Diagnosing problems with changing the instrument's measuring mode.

Measuring Unit Movement Issues

Troubleshooting smooth movement problems of the measuring unit on a plane and vertically.

Measuring Unit Unstable

Resolving instability issues with the measuring unit.

Alignment Light/Mire Ring Not Appearing

Troubleshooting the absence of alignment light (AR-600) or Mire Ring (ARK-700).

Unclear Model Eye Image

Resolving issues with a blurry or unclear model eye image on the TV monitor.

AR Measurement Fails to Start

Troubleshooting why the AR measurement process does not initiate.

Err Message During AR Measurement

Diagnosing and resolving 'Err' messages that occur during AR measurements.

SPH Value Shifted

Troubleshooting when the obtained SPH value is inaccurately shifted.

CYL Value Too Large

Resolving issues where the obtained CYL value is excessively high.

No Short Beep on Start Button

Troubleshooting the absence of a short beep when pressing the Start button.

IOL Mode Cannot Turn ON

Resolving issues with the IOL mode failing to activate.

Cylinder Mode Cannot Change

Troubleshooting problems when the Cylinder mode cannot be switched.

Cannot Recognize Left and Right

Diagnosing why the instrument fails to recognize the patient's left and right eyes.

Cannot Enter PD Mode

Troubleshooting inability to place the instrument in PD mode for measurement.

Abnormal PD Value

Resolving issues with an abnormal or incorrect PD measurement value.

Err During KM Measurement

Diagnosing and resolving 'Err' messages that occur during KM measurements.

Abnormal KM Value

Troubleshooting when the obtained KM value is abnormal or incorrect.

Chin Rest Up-and-Down Movement Issue

Resolving problems with the smooth up-and-down movement of the chin rest.

Chart Cannot Be Seen

Troubleshooting why the chart is not visible in the measuring window.

Err Not Appearing Despite Blink

Diagnosing why 'Err' does not appear even when the patient blinks during measurement.

Auto-Tracking Function Not Working

Resolving issues where the auto-tracking function fails to operate.

Auto-Shot Function Not Working

Troubleshooting the auto-shot function not initiating or working correctly.

Err IF Interface Error

Diagnosing and resolving 'Err IF' messages indicating interface communication errors.

Printer Does Not Operate

Troubleshooting issues where the printer fails to function or print.

Checking Electric Parts

Replacing Circuit Boards

Replacing PC1 (Main) Board

Procedure for replacing the main control board (PC1) of the instrument.

Replacing Parts

Replacing the Measuring Unit

Instructions for replacing the core measuring unit of the instrument.

Adjusting Each Part

Sensor Calibration (PC6 Board VR1/VR2 Adjustment)

Calibrating sensors by adjusting VR1 (S.GAIN) and VR2 (S.ZERO) on the PC6 board.

Program for Adjustment

References and Diagrams

Error Code Chart

A comprehensive chart detailing error codes, their indications, contents, and details.

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