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 ................
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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 ..............
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§ 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 §...
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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) .................
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ARK-700 WIRING DIAGRAM ................16-12 ARK-700A CONSTRUCTION DRAWING ............16-13 ARK-700A WIRNG DIAGRAM ................16-15 ARK-760A CONSTRUCTION DRAWING ............16-16 ARK-760A WIRING DIAGRAM ................16-18 AR-600, ARK-700 SERIES WIRING DIAGRAM ..........16-19 AR-600, ARK-700 SERIES CONNECTOR TABLE ..........16-22 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.
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”...
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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. 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”...
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“0.01D”? Can the mode be switched to <R> 3.10 The measuring mode can not be changed. mode ? (For model ARK-700 series only) Attach the Model eyes to the Forehead rest.. Is the movement of the measuring 3.11 The movement of the measuring unit is...
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3.26 The obtained PD value is abnormal. Place the system in <K> mode with where the KM measurement is done (only for ARK-700 series). Can you measure the steel ball ? 3.27 The message “ERR” appears when starting KM measurement.
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2 - 5 Check the measurements by measuring human eyes. Is the up-and-down movement of the 3.29 The up-and-down movement of the Chin Rest Chin Rest smooth? is not smooth Can you see the chart from the 3.30 The chart can not be seen Measuring Window ? Is blinking error detected? 3.31 “Err”...
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2 - 6 Can the presented chart be in focus 3.36 The presented chart is out of focus during the during the subjective measurement or subjective measurement (except when a patient while checking visual acuity? has irregular astigmatism) (only for the models with subjective measurement function) Can the instrument transmit or receive 3.37 The message “ERR IF”...
TROUBLESHOOTING § 3 3.1 The TV monitor displays nothing/the monitor display is abnormal Check the following connectors. PJ103, 104 (PC1) PJ201 (PC2) PJ701, 702 (PC7) * For details of each connector, see the Wiring Diagram and connector table. Are the fuses fre- Are the fuses all right even Replace the Are the fuse nomal?
* If the message “Err” appears after turning ON the Power Switch, set the following parameter to “YES”, following the instructions in Operator’s Manual. For AR-600 series (PARAMETERS 33: Err Code YES) For ARK-700 series (PARAMETERS 37: Err Code YES) 3.2.1 “Err 1” (Sensor carry error) appears. Check the following connectors.
3 - 3 3.2.2 “Err2” (Chart carry error) appears. Check the following connectotrs. PJ107 (PC1) PJ601, 607, 608 (PC6) * For details of each connector, see the Wiring Diagram and connector table. Replace the origin sensor for the chrtcarry with a new one. Is the origin sensor for chart carry normal? (See 10.1) (See 8.1.)
3 - 4 3.2.3 “Errr 3” (Rotator error) appears. Check the following connectors. PJ107 (PC1) PJ601, 606 (PC6) * For details of each connector, see the Wring Diagram and connector table attached to this manual. Is the origin sensor for the rotator normal? Replace the origin sensor for the rotator with the new one.
3 - 5 3.2.4 “Err 4” (Chart error) appears. Check the following connector. PJ111 (PC1) * Also check the state of the soldered connection. For details of the connector, see the Wiring Diagram and connector tabel attached to this manual. Replace the Chart unit (32908-3150).
3 - 6 3.2.6 “Err 7” ([line] printer error) appears. Is the printer paper set? Set in a new paper roll. (Refer to Operator’s Manual.) Is the head lever flipped down? Flip down the head lever. (Refer to Operator’s Manual.) Check the following connectors.
3 - 7 3.2.8 “Err 9” (MEMORY FAILURE ON EEPROM) appears. Print out the EEPROM DATA (Refer to Operator’s Manual.) Confirm that all items of EEPROM DATA are zero. Set all items of EEPROM DATA. (See 11.8.) Was EEPROM DATA memorized properly? Replace the PC6 board with a new one.
3 - 8 3.2.10 “PD ERR” appears. Avoid using the instrument in the environment where it is exposed to the direct sunlight or an incandescent light. If dust settles on the LED filter for PD (located at the foot of the Chin Rest), remove it with a blower brush.
3 - 9 3.3 The shutter does not open (only for AR-600 whose S/N is earlier than 10121) Remove the shutter unit. (See 10.8.) 3.4 A raster does not appear (The TV monitor does not light well.) Check the following connectors. PJ005 (MONITOR) PJ103,106,112 (PC1) PJ601 (PC6)
3 - 10 3.6 The characters or target are not clear or they do not appear on the TV monitor Adjust VR2 or VR3 achieve the best brightness of the monitor. (See 11.10.) Does the symptom clear? Replace the PC1 board with a new one.
3 - 11 3.9 The parameter settings can not be changed Check the following connectors. PJ104 (PC1) PJ201, 203 (PC6) * For details of each connector, see the Wiring Diagram and connector table attached to this manual. Check the state of the soldered connection. Replace the PC2 board with a new one.
3 - 12 3.10 The measuring mode can not be changed Check the following connectors. PJ104 (PC1) PJ201 (PC2) * For details of each connector, see the Wiring Diagram and connector table attached to this manual. function normally? (See 7.2.) Replace the PC2 board with a new one.
Replace the PC6 board with a new one. (See 9.4.) 3.15 The Mire Ring does not appear (only for ARK-700 series) Check the following connectors. PJ604, 616 (PC6) * For details of the connector, see the Wiring Diagram and connector tabel attached to this manual.
3 - 14 3.16 The model eye image is not clear Check the following connector. PJ614 (PC6) * Also check the state of the soldered connection. For details of each connector, see the Wiring Diagram and connector table attached to this manual. Replace the ILLUMI.LED with a new one.
3 - 15 3.18 The message “Err” appears during AR measurements Check the following connectors. PJ101, 106 (PC1) PJ601, 602 (PC6) * For details of each connector, see the Wring Diagram and connector table attached to this manual. Are the measuring light Is the LED cable right? (See Replace the LED cable source LEDs normal? (See...
3 - 16 3.19 Only the obtained SPH value is shifted Adjust Sensor offset. (See 11.8.1.) Replace the PC6 board with a new one. (See 9.4.) Is the volatge applied to two diodes proper? (See 6.5.) Perform the sensor calibration. (See 11.6.) Does the Symptom clear? Replace the PC1 board.
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3 - 17 3.20 The obtained CYL value is too large Check the following connectors. PJ101 (PC1) PJ602 (PC6) * For details of each connector, see the Wiring Diagram and connector table attached to this manual. Are the measuring window Clean the measuring window and the model eye clean? and model eye.
3 - 18 3.21 A short beep can not be heard when pressing the Start button Replace the PC1 board with a new one. (see 9.1.) 3.22 The IOL mode can not be turned ON Check the following connectors. PJ104 (PC1) PJ201 (PC2) * For details of each connector, see the Wiring Diagram and connector table attached to this manual.
3 - 19 3.24 The instrument can not recognize the left and right Check the following connectors. PJ103, 113 (PC1) PJ706 (PC7) PJ2301 (PC23) * For detail of each connector, see the Wiring Diagram and connector table attacned to this manual. Clean the IR filter.
3 - 20 3.26 The obtained PD value is abnormal Set the PD gain(PA). (See 11.5.) Does the symptom clear? Replace the PC1 board with a new one. (See9.1.) 3.27 The message “Err” appears during KM measurement Check the following connectors. PJ107 (PC1) PJ2101X (PC21X) PJ2101Y (PC21Y)
3 - 21 3.29 The up-and-down movement of the Chin rest is not smooth Adjust the up-and-down movement of the Chin rest. (See11.3.) 3.30 The chart can not be seen Check the following connector. PJ617 (PC6) * Check the state of the soldered connection. For details of each connector, see the Wiring Diagram and connector table attached to this manual.
3 - 22 3.31 “Err” does not appear though the patient blinked during measurement Check the following connector. PJ102 (PC1) * For details of each connector, see the Wiring Diagram and connector table attached to this manual. Is blink level set properly? (See 11.8.6.) Set blink level to the correct level.
3 - 23 3.32 The auto-tracking function does not work Check the following connectors. PJ11 (PC1) PJ2204, 2206, 2207, 2201 (PC22) PJ615 (PC6) * For details of each connector, see the Wiring DIagram and connector table attached to this manual. Set the model eye to the Chin rest.
3 - 24 3.33 The auto-shot function does not work Check the following connectors. PJ104 (PC1) PJ201, PJ203 (PC2) PJ615 (PC6) * For details of each connector, see the Wiring diagram and connector table attached to this manual. Does the switch function normally? Repalce the PC3 board with a new (See 7.3.) one.
3 - 25 3.35 VA Charts can not be changed Check the following connectors. PJ104 (PC1) PJ201, PJ203 (PC2) * Also check the state of soldered connection. For details of each connector, see the Wiring Diagaram and connector table attached to this manual. Do the switches Replace the PC3 board with on the PC3 board function...
3 - 26 3.37 The message “Err IF” (Interface Error) appears Check the following connector. PJ009 (RS232C CONNECTOR) PJ705 (PC7) * Also check the state of soldered connection. For details of each connector, see the Wiring Diagram and connector table attached to this manual. Replace the PC7 board with a new one.
3 - 27 3.38 The printer does not operate Check the following connectors. PJ103, 104, 105 (PC1) PJ201 (PC2) PJ703, 704 (PC7) PJ801, 802 (PC8) * For details of each connector, see the Wiring Diagram and connector table attached to this manual. Replace the PC2 board with Does the switch function...
3 - 28 3.40 The Eyeprint function can not be turned on Check the following connectors. PJ104 (PC1) PJ201 (PC2) * For details of each connector, see the wiring Diagaram and connector table attached to this manual. Replace the PC2 board with Does function a new one.
Checking the obtained data with Model eyes § 4 Obtaining the measurements with the model eyes ( + 10D, 0D and − 10D) and the Steel balls (5.95mm, 7.94mm and 9.13mm) is important for checking if the instrument operates normally or not.
4 - 2 4.2 Cleaning the measuring window 1. Turn ON the Power switch to open the shutter (only for the early model AR- 600). 2. Blow out dust with a blower. 3. Wrap lens tissue (Japanese special paper : Ganpi-shi) around the tool (for example, chopstick) as shown in the figure.
4 - 3 4.3 Measuring the Model eyes 1. Attach the Model eyes (ARKJ-4) to the Forehead rest. * Do not tighten the screws too much. The Forehead rest may be scratched. 2. Turn the Power switch ON. 3. Set the parameter 1: STEP to 0.01D. 4.
4 - 4 4.5 Measuring the Steel balls 1. Attach the Model eye (ARKJ-4) to the Forehead rest. 2. Turn the Power switch ON. Pressing , the instrument will be placed in the <K> (KM measurement) mode. 3. Perform fine alignment and focusing and start measurement.
Removing covers § 5 5.1 Removing the Front, Left and Right covers 1. Remove two caps (#541) on the front cover. Remove them with a screwdriver so as not to scratch the caps. 2. Unscrew PC3 × 8 (n=2). * It is not possible to remove the Front cover yet.
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5 - 2 5. Remove the Left and Right covers. * When removing or assembling the Left and right covers, hold both the covers with your both right and left hands and open them to the arrow direction as above. When fitting the cover, fasten the fixing lips of the Front cover in advance.
5 - 5 5.5 Removing the TV panel (For AR-600) 1. Pull out the elevation knob. 2. Unscrew PC3 × 8 and disconnect the connectors (J201 and J202) to remove the TV panel. * In removing the TV panel, first lift it to release the fixing lips of the panel, and then pull the panel forward from the bottom side.
5 - 6 5.6 Removing the bottom plate of the instrument 1. Fix the main body to the base with Locking hnob and gently lay down the instrument. 2. Unscrew PC3 × 6 and draw the printer unit to remove the bottom plate.
Checking the mains supply condition § 6 6.1 Checking the supply voltage to AC INLET 1. Check AC voltage in the wall outlet and between terminals on the table tap with a multimeter. Confirm that the voltages are within ± 10% of the specified voltage. If the obtained voltages are out of ±...
6- 2 6.3 Checking output voltage on PC7 board 1. Remove the Left and Right covers. (See 5.1) 2. Disconnect the connector P103 on PC1 board and turn ON the Power switch. Check the output voltage between the following pins. Confirm that each voltage are within ± 5% of the specified level.
6- 3 6.5 Checking voltage in D1 and D2 on the PC6 board 1. Remove the Left and Right covers. (See 5.1) 2. Remove the frame. 3. Turn ON the Power switch. Check the voltage between the leads of two zener diodes. Confirm that it is within ±...
Checking continuity of switches § 7 Remove the Left and Right covers and frame, and then disconnect the connector P104 to check each switch. As there are a diode for static protection on the circuit, pay attention to polarity of multimeter’s probe.
7 - 3 7.3 Switches on the PC3 board (except AR-600) Check the continuity between the following pins of P104 to confirm the switches’ correct operation. AR-600A AR-660A ARK-700 ARK-700A ARK-760A Switches’ positions and numbers differ according to each model. See the above table.
7 - 4 7.4 Switches on the PC12 board (only for AR-660A and ARK-760A) Check the continuity between the following pins of P108 to confirm the CHART SELECT switches’ correct operation.
Checking electric parts § 8 8.1 Checking origin sensor for the chart carry 1. Remove the Left, Right and Inner covers and turn ON the Power switch. (See § § § § § 5.) 2. Slide the Chart carry manually and check the output voltage between 3-pin and 4-pin of PJ608 with a multimeter oncewhile the shutter blocks P1...
8 - 2 8.2 Checking L/R origin sensor (except AR-600 & ARK-700) 1. Remove the Left, right covers and Rear cover of the measuring unit and turn ON the Power switch. (See § § § § § 5.) 2. Attach the Model eye (ARKJ-4) to the Forehead rest.
8 - 3 8.3 Checking the Origin sensor for the Rotator 1. Remove the Left, Right covers and Rear cover of the measuring unit and turn ON the Power switch. (See § 5.) 2. Rotate the SPD clockwise and Check the output voltage between 9-pin and 10 - pin of PJ606 with a multimeter while a shutter blocks the P1 (photo-interrupter) and...
8 - 4 8.4 AR measurement LED and LED cable 1. Remove the Left and Right covers and turn ON the Power switch. (See 5.1.) 2. Attach the Model eye (ARKJ-4) to the Forehead rest. 3. Set Switch 4 of switchpack SW1 on the PC1 board to the ON position. Press the Start button once to place the instrument to the “mode 1”.
8 - 5 8.5 Checking the ILLUMI. LED voltage 1. Remove the Left , Right covers and frame. Then disconnect the connector P614. Turn on the Power Switch. (See § 5.) 2. Check the voltage between 1-pin and 2-pin of J614 with a multimeter. Confirm that it reads around + 5V.
8 - 6 8.9 Checking the FOCUS LED voltage (only for AR- 600A, AR-660A) 1. Remove the Left and Right covers. Then disconnect the connector P615. Turn ON the Power Switch. (See 5.1.) 2. Check the voltage between 1-2-pin and 7-8 pin of J615 with a multimeter. Confirm that it reads around + 5V.
7. Set SW1 and SW2 according to “§ 14 List of SW1 and SW2 functions on the PC1 board”. * The PC1 board including ROM can be commonly used in the AR-600 and ARK-700 series. However, the setting of SW1 and SW2 differs according to the model and destination.
9- 2 9.2 Replacing PC2 (DISPLAY) board Replacement parts: 32906-BA02 1. Remove the TV panel. (See § 5.) 2. Unscrew PT3 × 8 and PT3 × 6 (n=3) to take the PC2 out. 3. Take off the Cover from the PC2 board and attach it to the new P.C.B with an adhesive tape.
9- 3 9.3 Replacing PC3 (INC.DEC SW) board (except AR- 600) Replacement parts: 32907-EA03 1. Remove the Rear cover and TV panel. (See § 5.) 2. Remove the Joystick (See 10.2). * It is possible to take out the PC3 board without disconnecting the wiring of the Joy stick.
9- 4 9.4 Replacing PC6 (ADJUST) board Replacement parts: 32906-BA06 1. Remove the Left, Right covers and frame. (See § 5.) 2. Remove all the connectors from the board. 3. Unscrew AS3 × 6 (n=2) and replace the PC6 board with a new one. * The connectors on the P.C.B is quite alike.
9- 5 9.5 Replacing PC7 (POWER SUPPLY) board Replacement parts: 32906-BA07 1. Fix the Main body to the Base with Locking knob, gently lay down the instrument. Then remove the bottom plate of the main body. 2. Unscrew PC4 × 6. 3.
9- 6 9.6 Replacing PC8 (PRINTER) board and printer (For AR-600 and ARK-700) Replacement parts (PC8) : 32903-E5008 (PRINTER) : 806-06-00007 line printer 1. Draw out the printer, turn the gear seen on the cover backward to take out the used paper roll.
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9- 7 (For AR-600A, AR-660A, ARK-700A and ARK-760A) Replacement parts (PC8) : 32907-BA08 (PRINTER) : 32907-E022 serial printer 1. Draw out the printer, turn the gear on the cover backward to take out the used paper roll. 2. Unscrew CK2 × 4 (n=3) to take off the Cover. 3.
9- 8 9.7 Replacing PC10 (MIRE) board (For ARK-700 series) Replacement parts: 32158-3380 : 80423-10002 (tie wrap) 1. Remove the Left, Right and Front covers. (See § 5.) 2. Unscrew FC3 × 10 (n=2) and to take the #3390 off.
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9- 9 (For AR-600A, AR-660A) Replacement parts: 32907-3380 : 80423-10002 (tie wrap) 1. Remove the Left, Right and Front covers. (See § 5.) 2. Unscrew FC3 × 10 (n=2) to take the #3390 off. 3. Unscrew CK2 × 4, replace the MIRE and tie the cables together as before. 4.
9- 10 9.8 Replacing PC12 (CHART SELECT SW) board (For AR-660A, ARK-760A) Replacement parts: 32908-EA12 1. Remove the Left, Right and Rear covers. (See § 5.) 2. UnscrewPT3 × 6 (n=4) and then replace the PC12 board with a new one.
9- 12 9.10 Replacing the PC23 (PD CCD) board Replacement parts PC23: 32906-BA23 Shading paper: 32906-M528 1. Remove the Left, Right and Front covers. (See § 5.) 2. Remove the #528 (shading paper). 3. Remove #82053-C305A(n=2), #526, the PC23 board and #EA34. 4.
9- 13 9.11 Replacing the PC24 (PD LED) board Replacement parts PC24: 32906-EA24 1. Take off the Bottom plate. (See 5.6.) 2. Replace the PC24 board with a new one. * Check to see that the LED stands straight.
Replacing parts § 10 10.1 Replacing the transformer Replacement parts (100V series) : 32903-E5051 (200V series) : 32903-E5052 1. Remove the bottom plate. (See 5.6.) 2. Take out the PC7 board. (See 9.5.) 3. Unscrew PC4 × 6 (n=4) and PC3 × 6 (n=3) and then take the power source unit out.
10- 2 10.2 Replacing the Joystick Replacement parts: AR series except AR-600 AR-600 ARK-700 And ARK-700 32906-2080 32158-2090 32907-2080 1. Remove the TV panel. (See 5.5.) 2. Take out the Rear cover. (See 5.4.) * For ARK-700, remove the connectors on the PC22 board which is on the side of the monitor.
10- 3 10.3 Cleaning and replacing the Slide plate Replacement part: 32906-M004 1. If the slide plate gets dirty, the movement of the main body on a plane becomes worse. In such cases, grip and lift the Joystick and insert a lens tissue with acetone between the base and the main body and wipe the slide plate, sliding the main body.
10- 4 10.4 Replacing LED and cleaning IR filter Replacement part: 32906-EA24 1. When “PD ERR” occurs, first clean the IR filter at the foot of the Head rest. * Cleaning is easily done by removing the Chin rest. To finish the cleaning, use the acetone.
10- 5 10.5 Replacing LED and cleaning of the G29 Replacement part: 32906-EA40 <Replacing the LED for the Alignment> 1. Remove the Left, Right and Inner covers and the frame. (See § 5.) 2. Loosen HH3 × 4 and replace the LED for the Alignment.
10- 6 10.6 Replacing the Front cover Replace the Front cover if the anterior segment lamp is faulty. Replacement parts: AR series except AR-600 AR-600 32906-6200 32907-6200 1. Remove the Left, Right and Front covers. (See 5.1.) 2. Replace the Front cover with a new one.
10- 7 10.7 Replacing the FOCUS LED Replacement part: 32907-EA43 1. Remove the Left, Right and Front covers . (See 5.1.) 2. Unscrew CK1.7 × 5 (n=4) and replace the FOCUS LED with a new one. 3. Perform the auto-tracking and auto-shot calibrations. * Return the cables to their original positions and arrange them so that they will not interfere with optical parts.
10- 8 10.8 Replacing the Shutter Replacement part: 32906-M542 (Moltopren) 1. Remove the Left, Right and Front covers. (See 5.1.) 2. Remove a shading paper (#529) from the Front cover. * A shading paper is cemented to the front cover with a double-sided tape. Pay attention not to tear it as it will be used again.
10 - 9 10.9 Replacing the LED cable Replacement part : 32903-E5033 1. Remove the Left, Right covers and Rear cover of the measuring unit. (See § 5.) 2. Disconnect the connector P606 and release the tied cables. (See 9.5.) 3.
10 - 10 10.10 Replacing the Chart lamp Replacement parts: 32906-EA14 1. Remove the Left, Right covers and Rear cover of the measuring unit. (See § 5.) 2. Unscrew CK2 × 4 (n=2) and replace the Chart lamp with a new one. * Arrange the Chart cable so that it will not interfere with the LED cable.
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10 - 11 10.11 Replacing the Chart carry origin sensor Replacement parts: 32906-EA36 1. Remove the Left cover, Rear cover of the measuring unit and Inner cover. (See § 5.) 2. Remove the screw (PC3 × 4) and #489. 3. Unscrew CK2 × 4 and replace the Chart carry Origin sensor with a new one. * Fix the sensor so that it will not interfere with the shutter of the Chart carry unit.
10 - 12 10.12 Replacing the Rotator unit origin sensor Replacement parts: 32903-E5045 1. Remove the Left and Right covers. (See § 5.1.) 2. Disconnect the connector (P606) and then pull the contact pin (1 - 6 pins) from the connector housing of the connector, and release the tie of the cables.
10 - 13 10.13 Replacing U/D limit switches <Checking the operation of U/D limit switch> 1. Remove the Left, Right, Inner covers and rear cover of the measuring unit. (See § 5.) 2. Check the upper and lower limit switches for proper operation. Disconnect the connector (P2205) and check the continuity in the switches with a multimeter.
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10 - 14 <Positioning Upper and Lower limit switches> 1. Remove the TV panel, Rear cover and Monitor. (See § 5 and 10. 17.) * Keep the Pulleys in a state where they can be moved easily and directly by hand. To achieve the state, it is recommended to remove the belt.
10 - 15 10.14 Replacing the Left and Right limit sensor unit (except for AR-600 and ARK-700) Replacement parts: 32907-EA49 1. Remove the Left, Right covers, Frame and the Rear cover of the measuring unit. (See § 2. Remove the connector and screw (CK2 × 4). Then replace the Left and Right limit sensor unit with a new one.
10 - 16 5. Press . The measuring unit will moves to its center. (Draw lines of the center position measured with the shading plate. Remember to draw lines of both the center measured from the left limit and the one measured from the right limit.) 6.
10 - 17 10.16 Replacing the R/L motor (For moving the instrument to the right or left) (Except AR- 600 and ARK-700) Replacement part : 32907-EA48 1. Remove the Left, Right and Front covers, Rear cover of the measuring unit, Inner cover and TV panel.
10 - 18 10.17 Replacing the TV Monitor Replacement parts: 32903-E001B 1. Remove the Rear cover and TV panel. (See § 5.) 2. Disconnect the connectors. 3. Remove the screws (AS3 × 6) and #176 and replace the TV monitor with a new one. * The Joystick may obstruct the replacement work.
10 - 19 10.18 Replacing the CCD camera Replacement parts: 32903-E001A 1. Remove the Left, Right covers, Rear cover of the measuring unit and Inner cover. (See § 5.) 2. Disconnect the connectors. * For AR-600, disconnect P004 only. 3. Unscrew AS3 × 8 (n=3) and replace the CCD camera with a new one.
10 - 20 10.19 Replacing the Chart unit Replacement parts: 32908-3150 1. Remove the Left and Right covers and the Rear cover of the measuring unit (See § 5.) 2. Disconnect the connectors. 3. Unscrew PC3 × 25 (n=3) and replace the chart unit with a new one. * Though the replacement part is stored in a plastic bag to keep dust out, check to see that no dust settles on the part before attaching it.
10 - 21 10.20 Replacing CYL unit (Only for AR-660A and ARK-760A) Replacement parts: 32908-3160 1. Remove the Left and Right covers and Rear cover of the measuring unit, and Inner cover. (See § 5.) 2. Take the shading plate out. 3.
10 - 22 10.21 Replacing the Battery Replacement parts: 32906-E651 1. Remove the Left and Right covers and Rear cover of the measuring unit, and Inner cover. (See § 5.) 2. Stand the PC1 board. 3. Replace the battery with a new one. * Observe the correct polarity for BT1.
10 - 23 10.22 Replacing the Measuring unit <For AR-600 and ARK-700> AR-600 AR-700 Replacement parts: 32906-9000 32158-9000 1. Remove the Left, Right covers, the Rear cover of the measuring unit and Inner cover. (See § 5.) 2. Disconnect the connectors on PC1 board. 3.
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10 - 24 <For AR-600A, AR-660A, ARK-700A and ARK-760A> Replacement parts: For AR-600A For ARK-660A ARK-700A ARK-760A 32907-9000 32908-9000 32159-9000 32160-9000 1. Remove the Left, Right and Front, Rear covers of the measuring unit, Inner cover and TV panel. (See § 5.) 2.
Adjusting each part § 11 11.1 Adjusting the pressure of roller bearing (#67) for up-and-down shaft If the roller bearings become loose due to shock delivered during transportation and the measuring unit becomes unstable, adjust the pressure of the bearings, following the procedure below. Replacement parts (Shaft) : 34322-M066 (Eccentric shaft) : 34322-M067...
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11- 2 6. Unscrew SB5 × 15 and then take off #5016. 7. Fit #5016 on the Shaft of #5017, loosen HH3 × 3 and adjust #66 so that the Shaft moves up and down smoothly and it is stable. * Since #67 has a slot on its head, #66 can be turned with a screwdriver for adjusting.
11- 3 11.2 Adjusting the Sway stopper unit If there is too much play in the Sway stopper unit due to shock delivered during transportation, and the measuring unit sways when laterally-turned, adjust the sway stopper unit, following the procedure below. 1.
11- 4 11.3 Adjusting the up-and-down movement of the Chin rest If the Chin rest knob become loose, it may drop with chin’s weight when placing chin on the rest. In such cases, adjust the Chin rest knob, following the procedure below. 1.
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11- 5 If the proper movement of the Chin rest cannot be achieved by adjusting the Knob, it is necessary to adjust the height of the Bevel gear B. In such cases, follow the procedures below. 3. Unscrew BB3 × 6 and take #43 off. 4.
11- 6 11.4 Calibrating by adjusting the focus of CCD camera lens 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.
11- 7 11.5 Positioning the target 1. Set Switch 4 of the switchpack to the ON position. 2. Press and place the instrument in the OTHER ADJUST MODE 10-0. 3. Align the frame of the model eyes to the measuring point and adjust the focus of two measurement light LEDs.
11- 8 11.6 Sensor calibration (adjusting VR1 and VR2 on the PC6 board) 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.
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. → → → → → SPH power increases. 2. Press while holding down Procedure for correcting - SPH range <For ARK-700 series> . → → → → → SPH power decreases. 1. Press while holding down . → → → → → SPH power increases.
11- 10 11.7 KM auto-calibration (only for ARK-700 series) 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.
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11- 11 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- 12 11.8 Setting EEPROM DATA If EEPROM DATA is cleared, inquire of NIDEK or your authorized distributor about DATA and set EEPROM DATA following the procedure below. * Regardless of no erroneous condition on the circuit, there are cases where EEPROM DATA is cleared and only “MEMORY FAILURE ON EEPROM”...
11- 13 11.8.1 Setting Sensor Offset (SO) 1. Disconnect the P101 connector. Connect the special tool between 1 and 3 pins, 2 and 3 pins to short-circuit the 1, 2, and 3 pins of the J1 connector on the PC1 board. Then turn the Power switch ON.
11- 14 11.8.2 Setting Print Density (PC) 1. Turn ON the Power switch. 2. Set Switch 3 of the switchpack 1 on the PC1 board to the ON position. The instrument will be placed in “MODE 10”. 3. Change the value with (the value changes in −...
11- 15 11.8.3 Setting Target Offset (TO) 1. Set the value as you inquired with PD button or in “MODE 11”. * The deterioration of the dial string may cause the 0D to be shifted. If you have a dioptric tester, look at the chart through a dioptric tester and check to see that the chart is in correct focus (Be sure to adjust the dioptric tester to your visibility).
11- 16 11.8.5 Setting PD Gain (PA) 1. Press the Start button to place the instrument in “MODE 13”. 2. Stick a scale on the Model eye with a plastic tape and calibrate the PD value to 64mm. 3. Align the target to the standard line of the scale. 4.
11- 17 11.8.7 Setting Horizontal Position (HP) of display 1. Place the instrument in “MODE 16-0” with the Start button. 2. Adjust the horizontal position of the display with 11.8.8 Setting Vertical Position (VP) of display 1. Place the instrument in “MODE 16-0” with the Start button.
11- 18 11.8.9 Adjusting scale for CS (Corneal Size) measurement (only for ARK-700 series) 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 3. Change the mode to “MODE 17-1” with the Start button.
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11- 19 <Adjusting CS> 1. Place the instrument in “MODE 18-0” with the Start button. 2. Adjust the vertical position of the fiducial line and guide line with 3. Change the mode to “MODE 18-1” with the Start button. 4. Adjust the vertical position of the fiducial line and guide line with 5.
11- 20 11. 8. 10 Setting CYL zero (C1) and CYL axis (C2) (Only for AR-660A and ARK-760) 1. Set Switch 4 of the switchpack 1 on the PC1 board to the ON position and press to place the instrument in the CYL lens mode. 2.
11- 21 11.9 Adjusting image centering When replacing CCD camera or TV monitor with new ones, the image centering may be slightly shifted. It is possible to adjust it with H.V. volume. However, if it can not be adjusted properly, follow the procedures below to perform the centering.
11- 22 11.10 Adjusting Brightness and Sharpness of display 1. Connect the connector P602 of the LED to J2 on the PC6 board. 2. Connect the oscilloscope as follows. Probe to soldered surface of J12 on the PC1 board alligator clip to ANALOG GND on the PC1 board 5 µs/DIV TIME...
11- 23 11.11 Tracking auto-calibration (except AR-600 and ARK-700) 1. Set Switch 4 to the ON position. Or press the Power switch while holding down to place the instrument in TRC ADJUST MODE. 2. Set Switch 6 to the ON position. 3.
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11- 24 8. Press the Start button once and place the instrument in “MODE 31”. * Hereafter the MODE No. will be switched to another No. with every press of the Start button. 9. Press and check to see that th measuring unit will move to the right limit.
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(Measurement will take place.) 24. If bars blink, it is possible that the light of the Mire ring (for ARK-700 series) or tracking light (For AR-600 series) may be coming out.
Program for adjustment § 12 To the system into the adjustmnet mode, turn ON DS4 or press PON, + Writing EEPROM data is possible while DSW4 is OFF. Or use combinations to writing the data. ・ AR ADJUST ( MODE Function Remarks AR adjustment: LED Off: Servo Off...
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Change the value with “ ” or “ ”. Revert to “MODE 0” with Auto-shot: Time-out at serial measurement Change the value with “ ” or “ ”. ・ SAGITTAL MODEL ( ) (only for ARK-700 series and SW6 is set to the ON position) Mode Function Remarks Sagittal model select Change the setting with “...
Replacing ROM (Program) § 13 R&D division releases Technical Bulletin every time the ROM version changes. If the program is not proper for your instrument, replace ROM with a correct one. Remember that all types of instrument has IC2 commonly installed. However, the earlier program version is not corresponding with AR-660A and ARK-760A.
List of SW1 and SW2 operations § 14 Functions of DIP SW (SW1) Functions of AR-10 (A)/RK-4 (A) DIP SW Functions of DIP SW SW No. Function RESERVE Factory setting: OFF RESERVE Factory setting: OFF RESERVE Factory setting: OFF Adjustment mode (AR, KM, OTHER) Normal mode Adjustment mode Dimming ON/OFF...
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14 - 2 Functions of ROTARY SW (SW2) Function of ROTARY SW (Except AR-10 TYPE Ⅱ Ⅱ Ⅱ Ⅱ Ⅱ ) ) ) ) ) Functions of ROTARY SW Model Code Model AR-10 AR-600 AR-10A AR-600A AR-10B AR-660A NOT USED NOT USED NOT USED NOT USED...
§ 15 1. Outline of AR measurement principle AR-600 and ARK-700 series uses invisible infrared rays as the light source for measurement. The infrared rays are projected thorough the slit on the patient’s retina, and the image formation on the Patient’s retina is detected by the photodetector and transmit it to the mechanism that determine the refractive power.
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15- 2 Fig. 2 illustrates the optical system when measuring hyperopia. If the slit is located at the focal distance of the objective lens in optical emitting system, the slit images do not coincide with each other on the retina; the photodetector A receives light mainly from SPOT B. On the other hand, the photodetector B receives light mainly from SPOT A.
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15- 3 3. Outline of KM measurement principle Fig 3 illustrates the optical system in which the light sources are projected on the cornea and the refracted light from the cornea reaches the photoreceptors. The figure shows that there are two measuring lights arranged in horizontal direction and the other two lights in vertical direction.
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15- 4 CCD lenear image sensor The CCD linear image sensor on which micro-photodiodes are in line detect relative spacings between imcoming rays. The bit number of the spacing between A and B spotlights can be obtained by measuring t with a certain unit of clock signal.
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16- 22 • AR-600, AR-700 SERIES CONNECTOR TABLE PJ101 SPD CHA BLUE LINE SPD CHB PJ104 D GND D GND (OPEN) (DUMMY) PJ201 +5V D +5V D FLAT CABLE +10V A GND FLAT -10V RIBBON PJ102 BLUE LINE W R1 MASK CHA W R0 MASK CHB...
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16- 23 PJ106 +15V SDUMPER PJ108 PJ601 SPOT -15V J1201 A GND +5V D SCAN5 SCAN6 FLAT +5V D +15V D FLAT LOAD DATA RIBBON +15V D +15V D RIBBON CLOCK S.M. AR LED R AR LED L D GND D GND D GND MIR.MOTOR...
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16- 24 S.C.A. ENCODER PJ204 J111 +15V D D GND J2201 +15V D D GND +15V D D GND LED LATCH LED SCK FLAT LED SO RIBBON ROTR/L EC1EC2 PJ602 AR LED R AR LED L D GND W HT +15V PJ603 S.M.+...
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16- 25 PJ608 P.I.A PJ613 ALIGN.LED A P.I.K ALIGN.LED K T.ORIGIN PJ614 ILLUMI.LED A D GND PJ609 CH.PM COM CH.PM COM PJ615 LED1 A (R) ø 1 LED1 K ø 2 LED2 A (U) ø 3 W HT LED2 K ø...
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16- 26 SER.PRINTER LIN PRINTER P.I.C PJ802 HOME SW P.I.E.K PJ704 PR.PROG. H.PM COM SW.P.I.A H.PM COM HOME SW/PRSTATUS H.PM ø 1 FLAT TH.TRIG. TH.EN. ø 2 +5V (PM) +5V(PM) RIBBON ø 3 DATA IN ø 4 B.E.O. LATCH FLEX CLOCK STB6 W IRE...
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16- 27 PJ2202 VIDEO IN W HT PJ004 VIDEO GND SHIELD PJ2301 ø M ø CCD W HT ø SH VIDEO OUT CAMERA W HT FLAT +5V A +12V W HT A GND RIBBON W HT W HT +5V(C) W HT PJ005 +12V MONITOR...
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16- 28 Indication Error Contents Details Code With code Without code Sensor error The distance the sensor moves is abnormal. Target error The target limit SW does not work. Rotator error The rotator limit SW does not work. Chart error The chart sensor does not work.
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* Specifications are subject to change without notice for improvement. NIDEK CO., LTD. : 34-14, Maehama, Hiroishi-cho, Gamagori, Aichi 443-0038, Japan (Manufacturer) Telephone: (0533) 67-6611 Facsimile: (0533) 67-6610 NIDEK CO., LTD : 6th Floor, Takahashi Bldg., No.2, 3-chome, Kanda-jinboucho (Tokyo Office) Chiyoda-ku, Tokyo 101-0051, Japan Telephone: (03) 3288-0571 Facsimile: (03) 3288-0570...