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 § 1 INTRODUCTION........................................................................................................1-1 § 2 CAUTION.....................................................................................................................2-1 2.1 Check flows and items to be checked ......................................................................2-2 § 3 TROUBLESHOOTING ..............................................................................................3-1 3.1 The TV monitor display nothing/the monitor display is abnormal ..........................3-1 3.2 The message “Err” appears after turning ON the Power Switch..............................3-2 3.2.1 “Err 1” (Sensor carry error) appears................................................................3-2 3.2.2 “Err 2” (Chart carry error) appears..................................................................3-3 3.2.3 “Err 3” (rotary error) appears..........................................................................3-4 3.2.4 “Err 4” (Chart error) appears...........................................................................3-5 3.2.5 “Err 5”(CL1 error) or “Err 6” (CL2 error) appears .........................................3-5 3.2.6 “Err 7”([line] printer error) appears ................................................................3-6 3.2.7 “Err 8”([serial] printer error)appears...............................................................3-6 3.2.8 “Err 9” (MEMORY FAILURE ON E2PROM) appears..................................3-7 3.2.9 “Err A” (MEMORY FAILURE ON RAM) appears........................................3-7 3.2.10 “PD ERR” appears........................................................................................3-8 3.3 The shutter does not open (only for AR-600 whose S/N is earlier than 10121) ......3-9 3.4 The raster does not appear (The TV monitor does not light well) ...........................3-9 3.5 Eye image does not appear on the TV monitor ........................................................3-9 3.6 The characters or target are not clear or they do not appear on the TV monitor....3-10 3.7 The switching between the manual mode and auto-tracking mode can not be done .... ......................................................................................................................................3-10 3.8 The instrument can not be placed into the mode where the objective measurement is performed......................................................3-10 3.9 The parameter settings can not be changed............................................................3-11 3.10 The measuring mode can not be changed.............................................................3-12 3.11 The movement of the measuring unit is not smooth on a plane...........................3-12 3.12 The vertical movement of the measuring unit is not smooth ...............................3-12 3.13 The measuring unit is unstable.............................................................................3-13 3.14 The alignment light does not appear (only for AR-600 series) ............................3-13 3.15 The Mire Ring does not appear (only for ARK-700 series) .................................3-13 3.16 The model eye image is not clear.........................................................................3-14 3.17 AR measurement does not start............................................................................3-14 3.18 The message “Err” appears during AR measurements.........................................3-15 3.19 Only the obtained SPH value is shifted................................................................3-16 3.20 The obtained CYL value is too high.....................................................................3-17 3.21 A short beep can not be heard when pressing the Start button.............................3-18 3.22 The IOL mode can not be turned ON...................................................................3-18 3.23 The Cylinder mode can not be changed ...............................................................3-18 3.24 The instrument can not recognize the left and right.............................................3-19 3.25 The instrument can not be placed in the PD mode...............................................3-19 3.26 The obtained PD value is abnormal .....................................................................3-20 3.27 The message “Err” appears during KM measurement .........................................3-20 3.28 The obtained KM value is abnormal....................................................................3-20 3.29 The up-and-down movement of the Chin rest is not smooth...............................3-21 3.30 The charts can not be seen....................................................................................3-21 3.31 “Err” does not appear though the patient blinked during measurement...............3-22 3.32 The auto-tracking function does not work ...........................................................3-23 3.33 The auto-shot function does not work..................................................................3-24 3.34 The instrument can not be placed in the VA TEST mode where the subjective measurement is done ..........................................................3-24 3.35 VA charts can not be changed...............................................................................3-25 3.36 The presented chart is out of focus during the subjective measurement (except when a patient has irregular astigmatism)...............................................3-25 3.37 The message “Err IF” (Interface error) appears....................................................3-26 3.38 The printer does not operate.................................................................................3-27 3.39 Light printed text/loss of text ...............................................................................3-27 3.40 The Eyeprint function can not be turned On ........................................................3-28 3.41 The TV auto-OFF function does not work...........................................................3-28 3.42 The shutter does not close (only for the instruments whose S/N earlier than 10121) ............................................3-28 § 4 Checking the obtained data with Model eyes ............................................................4-1 4.1 Cleaning the Model eyes and Steel balls..................................................................4-1 4.2 Cleaning the measuring window..............................................................................4-2 4.3 Measuring the Model eyes .......................................................................................4-3 4.4 Tolerance on AR measurement error........................................................................4-3 4.5 Measuring the Steel balls .........................................................................................4-4 4.6 Tolerance on KM measurement error.......................................................................4-4 § 5 Removing covers...........................................................................................................5-1 5.1 Removing the Front, Left and Right covers.............................................................5-1 5.2 Removing the Rear cover of the measuring unit......................................................5-3 5.3 Removing the Inner cover........................................................................................5-3 5.4 Removing the Rear cover.........................................................................................5-4 5.5 Removing the TV panel ...........................................................................................5-5 5.6 Removing the bottom plate of the instrument..........................................................5-6 § 6 Checking the mains supply condition.........................................................................6-1 6.1 Checking the supply voltage to AC INLET..............................................................6-1 6.2 Checking the secondary voltage of the transformer.................................................6-1 6.3 Checking output voltage on PC7 board....................................................................6-2 6.4 Checking output voltage from backup battery .........................................................6-2 6.5 Checking voltage in D1 and D2 on the PC6 board ..................................................6-3 § 7 Checking continuity of switches..................................................................................7-1 7.1 START SW...............................................................................................................7-1 7.2 Switches on the PC2 board ......................................................................................7-1 7.3 Switches on the PC3 board (except AR-600)...........................................................7-3 7.4 Switches on the PC12 board (only for AR-660A and ARK-760A)..........................7-4 § 8 Checking electric parts ................................................................................................8-1 8.1 Checking origin sensor for the chart carry ...............................................................8-1 8.2 Checking L/R origin sensor (except AR-600 & ARK-700) .....................................8-2 8.3 Checking the Origin sensor for the Rotator..............................................................8-3 8.4 AR measurement LED and LED cable.....................................................................8-4 8.5 Checking the ILLUMI. LED voltage........................................................................8-5 8.6 Checking the Chart lamp voltage.............................................................................8-5 8.7 Checking the alignment light LED voltage..............................................................8-5 8.8 Checking the PD LED voltage.................................................................................8-5 8.9 Checking the FOCUS LED voltage (only for AR-600A, AR-660A).......................8-6 8.10 Checking the AKM LED voltage (only for AR-700 series)...................................8-6 8.11 Checking the AKM LED voltage (except AR-600)................................................8-6 § 9 Replacing circuit boards..............................................................................................9-1 9.1 Replacing PC1 (MAIN) board .................................................................................9-1 9.2 Replacing PC2 (DISPLAY) board............................................................................9-2 9.3 Replacing PC3 (INC.DEC SW) board (except AR-600) .........................................9-3 9.4 Replacing PC6 (ADJUST) board.............................................................................9-4 9.5 Replacing PC7 (POWER SUPPLY) board...............................................................9-5 9.6 Replacing PC8 (PRINTER) board and printer.........................................................9-6 9.7 Replacing PC10 (MIRE) board................................................................................9-8 9.8 Replacing PC12 (CHART SELECT SW) board ....................................................9-10 9.9 Replacing the PC22 (TRACKING) board..............................................................9-11 9.10 Replacing the PC23 (PD CCD) board..................................................................9-12 9.11 Replacing the PC24 (PD LED) board ..................................................................9-13 § 10 Replacing parts...........................................................................................................10-1 10.1 Replacing the transformer....................................................................................10-1 10.2 Replacing the Joystick..........................................................................................10-2 10.3 Cleaning and replacing the Slide plate.................................................................10-3 10.4 Replacing LED and cleaning IR filter..................................................................10-4 10.5 Replacing LED and cleaning of the G29..............................................................10-5 10.6 Replacing the Front cover ....................................................................................10-6 10.7 Replacing the FOCUS LED .................................................................................10-7 10.8 Replacing the Shutter ...........................................................................................10-8 10.9 Replacing the LED cable......................................................................................10-9 10.10 Replacing the Chart lamp.................................................................................10-10 10.11 Replacing the Chart carry limit sensor .............................................................10-11 10.12 Replacing the Rotator unit origin sensor......................................................... 10-12 10.13 Replacing U/D limit switches ..........................................................................10-13 10.14 Replacing the Left and Right limit sensor unit.................................................10-15 10.15 Replacing the U/D Motor (for moving the measurement unit up and down) (Except AR-600)................10-16 10.16 Replacing the R/L motor (For moving the instrument to the right or left) (Except AR-600 and ARK-700).......................................................................10-17 10.17 Replacing the TV Monitor ...............................................................................10-18 10.18 Replacing the CCD camera..............................................................................10-19 10.19 Replacing the Chart unit...................................................................................10-20 10.20 Replacing CYL unit (Only for AR-660A and ARK-760A)..............................10-21 10.21 Replacing the Battery.......................................................................................10-22 10.22 Replacing the Measuring unit ..........................................................................10-23 § 11 Adjusting each part....................................................................................................11-1 11.1 Adjusting the tightness of roller bearing (#67) for up-and-down shaft................11-1 11.2 Adjusting the Sway stopper unit...........................................................................11-3 11.3 Adjusting the up-and-down movement of the Chin rest.......................................11-4 11.4 Calibrating by adjusting the focus of CCD camera lens ......................................11-6 11.5 Positioning the target square ................................................................................11-7 11.6 Sensor calibration (adjusting VR1 and VR2 on the PC6 board)..........................11-8 11.7 KM auto-calibration (only for ARK-700 series) ................................................11-10 11.8 Setting EEPROM DATA....................................................................................11-12 11.8.1 Setting Sensor Offset (SO)........................................................................11-13 11.8.2 Setting Print Density (PC).........................................................................11-14 11.8.3 Setting Target Offset (TO).........................................................................11-15 11.8.4 Setting Target Gain (TG)...........................................................................11-15 11.8.5 Setting PD Gain (PA) ................................................................................11-16 11.8.6 Setting Mask Blink Level (ML)................................................................11-16 11.8.7 Setting Horizontal Position (HP) of display..............................................11-17 11.8.8 Setting Vertical Position (VP) of display...................................................11-17 11.8.9 Adjusting scale for CS (Corneal Size) measurement (only for ARK-700 series).........................................................................11-18 11.8.10 Setting CYL zero (C1) and CYL axis (C2) (Only for AR-660A and ARK-760).........................................................11-20 11.9 Adjusting image centering..................................................................................11-21 11.10 Adjusting Brightness and Sharpness of display................................................11-22 11.11 Tracking auto-calibration (except AR-600 and ARK-700)...............................11-23 § 12 Program for adjustment ............................................................................................12-1 § 13 Replacing ROM (Program).......................................................................................13-1 § 14 List of SW1 and SW2 operations.............................................................................14-1 § 15 Principle of Measurement..........................................................................................15-1 § 16 References ...................................................................................................................16-1 (cid:121) AR-600 CONSTRUCTION DRAWING...................................................................16-1 (cid:121) AR-600 WIRING DIAGRAM...................................................................................16-3 (cid:121) AR-600A CONATRUCTION DRAWING................................................................16-4 (cid:121) AR-600A WIRING DIAGRAM................................................................................16-6 (cid:121) AR-660A CONSTRUCTION DRAWING................................................................16-7 (cid:121) AR-660A WIRING DIAGRAM................................................................................16-9 (cid:121) ARK-700 CONSTRUCITON DRAWING..............................................................16-10 (cid:121) ARK-700 WIRING DIAGRAM..............................................................................16-12 (cid:121) ARK-700A CONSTRUCTION DRAWING...........................................................16-13 (cid:121) ARK-700A WIRNG DIAGRAM ............................................................................16-15 (cid:121) ARK-760A CONSTRUCTION DRAWING...........................................................16-16 (cid:121) ARK-760A WIRING DIAGRAM...........................................................................16-18 (cid:121) AR-600, ARK-700 SERIES WIRING DIAGRAM.................................................16-19 (cid:121) AR-600, ARK-700 SERIES CONNECTOR TABLE..............................................16-22 (cid:121) ERROR CODE CHART .........................................................................................16-28 § INTRODUCTION 1 • This manual provides information on after-sales servicing procedures of NIDEK AUTO REFRACTOMETER AR-600 series and AUTO REF/KERATOMETER ARK-700 series. • For correct after-sales service, it is necessary to understand this manual thoroughly before service. • If the instrument cannot be repaired by following the procedures described in this manual, contact NIDEK or your authorized distributor and let us know the serial number and details of the symptom. If it is possible to obtain measurements in the condition, also send us the data obtained by measuring with the model eye (-10D, 0D, +10D) and steel balls (5.95mm, 7.94mm and 9.13mm). § TROUBLESHOOTING 2 • For correct after-sales service, follow the procedures described in “2.1 Check flows and items to be checked” of this manual. For operating procedure, refer to “Operator’s Manual” for each instrument. • If you encounter any abnormal condition, track down the failure’s source as described in “3 TROUBLESHOOTING” and then immediately turn OFF the Power Switch of the instrument. • Before disassembling the instrument, be sure to turn OFF the Power Switch and disconnect the power cord from the wall outlet. • In “3 TROUBLESHOOTING”, check the following for cables, referring to the attached WIRING DIAGRAM and CONNECTOR TABLE. All the connectors are connected or crimped securely. There is no contact failure of connectors. (Check by connecting or disconnecting them.) The cable has no break. Take care not to strain the cable. • Take care not to lose the removed screws or parts, or not to drop them inside the instrument. • Be sure to apply Locktight to the fixed screws. 2 - 2 2.1 Check flow and items to be checked Plug the power cord to the wall outlet and turn ON the Power Switch. Y N Does the TV monitor displays zero for 3.1 The TV monitor displays nothing/the monitor S, C, A values? However, if the display is abnormal measuring mode is set to <K>, the 3.2 The message “ERR” appears after turning ON monitor will display nothing. the Power Switch. Y Does the shutter open ? N 3.3 The shutter does not open (Only for AR-600 (For early model AR-600 only) whose S/N is earlier than 10121) Y N 3.4 A raster does not appear. Does a raster appear on the TV (The TV monitor does not turn ON.) monitor? Y N Does the TV monitor display a 3.5 Eye image does not appear on the TV monitor. human eye? Y N Does the TV monitor display 3.6 The characters or target square are not clear or characters clearly? they do not appear on the monitor. Y Press . (for A-type model only) Is the auto-tracking mode switched to the manual mode (the mode where N 3.7 The switching between the manual mode and the auto-tracking function is off ) ? auto-tracking mode can not be done. (for A-type model only) Y Press the Recall Switch. (For the instruments provided with subjective measurement function only) N Can the instrument be placed in 3.8 The instrument can not be placed in the mode the objective measurement mode? where the objective measurement is performed. Y