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74 Auto Ref/Keratometer CRK-1 ------------------------------------------------------------------------------------------------

5.5. Disassembling the MAIN FRAME ASSY.

(1)

Removal Method

Remove the screws (19) and then separate the XZ-RAIL-ASSY (17).

Remove the set screws , knob (13) and then separate the FOOT (12).

Remove the screws(18) and then separate the base-plate (9) and bottom-
cover(15).

Remove the screws and then separate the power-brk-assy (15).

Remove the screws and then separate the SMPS (4).

Remove the screws (11) and then separate the , HEAD REST CONNECTOR
(9), PACKING-LOCK-SHAFT (8).

Remove the screws (20) and then separate the PD-PLATE-BRK(2)

Remove the screws (3) and then separate the JOY-PLATE

(2) Point for Assembly

Assembly is the reverse procedure of disassembly

.

Summary of Contents for CRK-1

Page 1: ...Service Manual Auto Ref Keratometer CRK 1...

Page 2: ...believe that the contents of this user manual are accurate in overall since they were reviewed carefully However Shanghai Huvitz does not assume any kind of res ponsibility for the latent mistake or o...

Page 3: ...9 07 Shanghai Huvitz Co Ltd Building 1 No 150 Renjie Road Fengxian Shanghai 201401 China All rights reserved Under copyright laws this manual may not be copied in whole or in part without the prior wr...

Page 4: ...12 3 Product Outline 14 3 1 Nomenclature 14 3 2 Optical System 18 3 3 Electrical System 22 3 4 Mode Setting 30 3 5 Principles of Measurement 31 4 Repair Standard 35 4 1 Checking and Control 35 4 2 Aut...

Page 5: ...Assembly Procedure 68 5 1 Removing the Cover 68 5 2 Disassembling the Moving Base Assy 70 5 3 Disassembling the Front Cover Assy LCD Assy 71 5 4 Disassembling the OPTICAL HEAD ASSY 73 5 5 Disassemblin...

Page 6: ...h Hospital Grade Type NEMA 5 15P other end with appliance coupler For use of equipment in rated voltage less than 250Vac min imum 6A Type SJT or SVT 18 3AWG 10A max 3 0m long One end terminates with b...

Page 7: ...t this equipment and any associated accessories It is paramount that the instructio ns contained in this manual are fully understood and followed to enhance safety to the p atient and the user operato...

Page 8: ...ored NOTE Note describes information for the installation operation or maintenance of w hich is important but hazard related if ignored Caution indicates the presence of a hazard that could result in...

Page 9: ...dans la Communaut europ enne It indicates the safe ground point connected to the chassis of e quipment It is required to do the protective ground to the cond uctive section in the equipment of class I...

Page 10: ...tion crasement ou insertion de la main CE Mark Marque CE CE for RoHS RoHS Directive Compliance 2011 65 EU CE pour RoHS Conformit la directive RoHS 2011 65 UE Atmospheric pressure limitation Limitation...

Page 11: ...osed to water vapor Don t operate the equipmen t with wet hands Where the machine ca n be exposed to the c hemical or flammable s ubstances Where the machine is e xposed directly to the su nlight Plea...

Page 12: ...o excessive sho cks or Vibrations Do not pull the plug o ut of outlet while holdi ng the cord For the normal operation of the machine please keep the ambient temperature is 10 35 humidity is 30 75 and...

Page 13: ...2 The device should neither be kept nor installed in the place with high humidity For the optimal operation the humidity should be at the range of 30 75 The machine should not be exposed to the place...

Page 14: ...ions are authorized to install use operate and maintain this equipment 10 User s manual or service manual should be kept in the place where the persons in charge of operation and maintenance can acces...

Page 15: ...omenclature 1 Head Rest Preventing the vibration by fixing the head 2 Stage fixation lever for fixating stage 3 Power indicator Lamp Indicates whether or not the electric power is on 4 Display Monitor...

Page 16: ...ns for measuring the image that is formed in the ey e retina 3 Chin rest location for placing the chin to prevent test subject from moving the f ace Chin rest paper Type B attachment part 4 Chin rest...

Page 17: ...onnector for connecting outside device connector 3 RGB connector Connector for connecting with the outside monitor of the RGB method 4 Power switch switch for turning the power on or off 5 Clamping bo...

Page 18: ...Auto Ref Keratometer CRK 1 17 Use signal amplifier if the distance with the outside monitor is significant...

Page 19: ...18 Auto Ref Keratometer CRK 1 3 2 Optical System...

Page 20: ...he Keratometry 4 1 White LED 4 2 Blue LED 5 Objective lens 6 Half mirror 7 Relay lens 8 IR filter K measurement 9 Imaging lens 10 TV camera K C 11 Half mirror 12 Reflection mirror 13 Relay lens 14 Ima...

Page 21: ...ns to compensate refractive power 28 Imaging Lens for Refractometer Signal 29 TV camera R 30 Moving module to compensate refractive power R Refractometer K Keratometer C Color imaging Light Paths of t...

Page 22: ...5 6 11 17 24 25 26 27 28 29 Illumination system of the light source for Retro Illume observation 23 22 21 20 19 18 17 11 6 5 1 Image capturing system of Retro Illume observation 1 5 6 7 8 9 10 Project...

Page 23: ...22 Auto Ref Keratometer CRK 1 3 3 Electrical System Electrical construction diagram 3 3 1 1 System functional block diagram...

Page 24: ...Auto Ref Keratometer CRK 1 23 3 3 1 2 Power input electrical block diagram AC 100 240 Power switch DPST SMPS DC Output 5V 4A 5V 2A 12V 1 8A Dual Line Fuse SMPS Output DC12V...

Page 25: ...24 Auto Ref Keratometer CRK 1 Electrical wiring 3 3 1 3 Main Board 3 24 23 22 21 20 19 18 17 16 15 13 12 11 10 9 8 7 6 5 4 2 1 2 1 3 4 5 6 7 8 9 10 11 12 14 13 15 16 17 18 21 20 22 23 24 19...

Page 26: ...GB OUT RGB OUT HARNESS 5 CN16 READY LED READY LED HARNESS 6 CN9 OPTIC MOVEMENT MOTOR OM MOTOR HARNESS 7 CN10 IR FILTER MOTOR IR FILTER MOTOR HARNESS 8 CN14 UART0 PORT UART HARNESS 9 CN6 UART2 PORT UAR...

Page 27: ...S OUT CONNECTOR 17 CN15 CHART LED CHART LED BOARD 18 CN14 REF LED REF LED HARNESS 19 CN7 LCD TOUCH LCD ASSY 20 CN13 OPTIC LED MIRERING BOARD CN1 21 CN12 PRISM MOTOR PRISM BLDC MOTOR 22 CN26 KEYPAD Not...

Page 28: ...1 27 3 3 1 5 MIRERING BOARD 3 3 1 6 Description of wire harness connection of MIRERING BO ARD Connect No Description Target connector 1 CN1 OPTIC LED INTERFACE MAIN BOARD CN13 2 CN3 FOCUS LED L FOCUS...

Page 29: ...L LED L EXTERNAL LED BOARD 4 CN5 COLOR LED L WHITE BLUE LED HARNESS 5 CN4 COLOR LED R WHITE BLUE LED HARNESS 6 CN12 EXTERNAL LED R EXTERNAL LED BOARD 7 CN2 FOCUS LED R FOCUS LED ASSY 3 3 1 7 Picture o...

Page 30: ...U29 XC6SLX25 2FGG484C Xillinx FPGA Logic Array 3 U32 THC63LVDF84 LVDS Receiver 4 U33 DS92LV1212A LVDS Deserializer 5 U34 ADC101S021CIMF ADC 6 U35 MDIN241 VGA Coverter 7 U22 DRV8825 STEP Motor Driver...

Page 31: ...rn on the system with pressing button as following content of table Start Key Description Joystick Button S W Upgrade Mode Download OS program into ROM via serial port Ex COM permanently After downloa...

Page 32: ...e that is if the ex aminee s eye is emmetropia hyperopia or myopia the reflected light from th e retina is parallel to the optic axis of the eye diverge or converge respecti vely 3 The light beam refl...

Page 33: ...and minor axis 2b and then the rotational angle axis on the minor meridian Furthermore there is a correlation between the radius of cornea R the height of the projected ring image H which can be obtai...

Page 34: ...some of it go through the crystalline lens and the iris If it is captur ed by TV camera any turbid part of the transparent vitreous humor lens and cor nea can be observed 3 5 1 2 Usage of Retro Illum...

Page 35: ...34 Auto Ref Keratometer CRK 1...

Page 36: ...ult repeatedly you can suspect internal problem In that case checking internal status at Engineer Mode can be helpful 4 1 1 Enter the Engineer Mode To enter the Engineer Mode take following steps 1 To...

Page 37: ...l quality 1 Set any model eye on the chin rest 2 Enter the 1 1 REF TEST MODE 3 Change mode to R CCD 4 Check the quality of signal REF signal has a ring shape If there are apparent defects at the signa...

Page 38: ...eter CRK 1 37 4 1 3 Check REF calibration data If the signal quality is not bad you can check calibration data in the second place 1 Enter the 1 2 REF DATA SETUP 2 Touch GRAPH button 3 Check the shape...

Page 39: ...hould take a calibration again Or though the calibration data has no problem if the physical condition of the device is changed from initial status re calibration can be a solution Of course all of ou...

Page 40: ...Keratometer CRK 1 39 2 Run calibration The number of calibration points are thirteen 30 0D 25 0D REF calibration should be taken for all of them 3 Save the result After calibration you have to save i...

Page 41: ...40 Auto Ref Keratometer CRK 1...

Page 42: ...in KER measurement the first thing you can check is KER s ignal quality Mire led quality can be checked with following steps 1 Touch CAPT button to capture current signal 2 Increase threshold to uppe...

Page 43: ...42 Auto Ref Keratometer CRK 1 4 If the yellow marked area is too small and there are relatively big white areas you could increase Mire duty at SYSTEM settings to cover it...

Page 44: ...no apparent problem you can check calibration data Checking KER calibration data is available at 1 4 KER DATA SETUP Like REF calibration data ascending or descending current is important If there are...

Page 45: ...44 Auto Ref Keratometer CRK 1 In that case you should take a calibration again...

Page 46: ...ndition of the device is changed from initial status re calibration can be a solution Of course all of our product release after passing strict examinations for durability and c onsistency But if is a...

Page 47: ...us calibration The first thing you have to do is on focus calibration On focus calibration is for yellow points on KER data graph 1 Set KER 0D model eye on the chin rest and enter the KER TEST MODE 2...

Page 48: ...Auto Ref Keratometer CRK 1 47 3 Control working distance to match HR 4 Touch SETUP button...

Page 49: ...48 Auto Ref Keratometer CRK 1 5 Touch 0D target 6 Set real target diopter and touch START SETUP button...

Page 50: ...Auto Ref Keratometer CRK 1 49 7 Calibration for target diopter would run automatically 8 Repeat this process to other diopters...

Page 51: ...50 Auto Ref Keratometer CRK 1 De focus calibration De focus calibration is for these points 1 Set KER 0D model eye on the chin rest and enter the KER TEST MODE 2 Touch FOCUS button...

Page 52: ...Auto Ref Keratometer CRK 1 51 3 Select 0D target 4 Run calibration for each points from 1 5 to 1 5 5 Repeat this to all other diopters...

Page 53: ...52 Auto Ref Keratometer CRK 1 Save After calibration you have to save it to FRAM...

Page 54: ...efficients to control the tr acking power Menu for tracking coefficients control is 2 2 TRACKING SETUP Bottom two items are for auto tracking Others are for joystick scrolling and they are not for you...

Page 55: ...rt with default value 2 Test tracking performance A Move focus cross to outer mire ring edge B Leave the joystick out and watch the tracking action C If the cross passed the center of mire ring then y...

Page 56: ...the cross stopped at the center of mire ring without passing then the test is success 3 If Step 2 is failed increase setting value and retry 4 If Step 2 is succeed current values are the answer 5 Rep...

Page 57: ...56 Auto Ref Keratometer CRK 1 4 3 Pupil distance calibration PD Setup PD Setup is available at 3 2 PD TEST SETUP...

Page 58: ...3 STEP The offset of the slit spacing Slit pitch Offset increases 4 STEP The offset of the slit spacing Slit pitch Offset decreases 5 EXIT PD Setup will exit Slit pitch Offset is changed the screen up...

Page 59: ...he screen and prees joystick button 3 Move the machine optical head 4 cm to the left The focus is adjusted on the sc reen and prees joystick button 4 Move the machine optical head 1 cm to the right Th...

Page 60: ...4 4 Factory Data Setup 1 MAKE SYSTEM BACKUP It is for our factory worker Please do not touch it 2 VERIFY BACKUP DATA Check if the valid system backup is stored 3 RESTORE SYSTEM Restore all system data...

Page 61: ...60 Auto Ref Keratometer CRK 1 Copy backup data to another FRAM 4 5 Color Test Verify the LCD Color temperature 1 Each number on the screen is color temperature 2 Bigger number is warmer color...

Page 62: ...Auto Ref Keratometer CRK 1 61 4 6 Touch Setup 1 Start touch setup button in the engineer mode 2 Press start button or touch LCD a few seconds 3 Press the cross marker 9 section until beep sound...

Page 63: ...62 Auto Ref Keratometer CRK 1 4 Touch APPLY button to apply the result of calibration...

Page 64: ...is as follows VIEW i The selected Pixel color camera and the location of the Dead Pixel is displa yed as a rectangle on the screen CLEAR i Stored information to initialize all the Dead Pixel DPC funct...

Page 65: ...nning of the search and discovery of th e Dead Pixel count is displayed on the screen Ten thousand days When Buffer Full output with the message DPC compensation will exceed the number of po ssible De...

Page 66: ...the engineer mode Test the each mode If Test is success or fails select pass or fail on pass and fail button 2 Menu NO DISP All of the sections disappear on the screen DISP All of the sections appear...

Page 67: ...CRK 1 2 Start DNW program set your PC s COM port number 115200 Bps 3 Connect PC to CRK 1 with serial cable 4 Pressing the 5th key then turn on CRK 1 5 DNW program will show the following screen 6 Sele...

Page 68: ...Auto Ref Keratometer CRK 1 67 8 After downloading turn off and on the HRK 9000A 9 Confirm the changed SW version on boot screen...

Page 69: ...over 1 Remove the screws 10 of the Main body 1 and then separate the Head Rest A ssy 11 2 Remove the BOLTCAP and screws 2 4 and then separate Right Left Side Cove r 3 5 3 Remove the screws 8 and then...

Page 70: ...separate the moving base front cover 5 2 Remove the screws 4 and then separate the moving base rear cover 6 3 Remove the screws 2 and then separate the optical head assy 3 4 Remove the screws 7 and t...

Page 71: ...hen remove the joystick assy 5 Remove the set screws and then remove the gear 8 Remove the set screws and then remove the gear 9 Remove the screws 7 and then remove the y axis assy 4 Remove the screws...

Page 72: ...er Assy LCD Assy 1 Removal Method Remove the screws 8 and then remove the main board 7 Remove the the board PC film 6 and tape Remove the screws 5 and then remove the lcd brk 4 Remove the lcd 3 Remove...

Page 73: ...72 Auto Ref Keratometer CRK 1 2 Point for Assembly Assembly is the reverse procedure of disassembly...

Page 74: ...sassembling the OPTICAL HEAD ASSY 1 Removal Method Remove the screws 1 and then separate the Y AXIS GUIDE PLATE 2 Remove the screws 3 and then remove the OPTIC COVER 4 2 Point for Assembly Assembly is...

Page 75: ...and then separate the base plate 9 and bottom cover 15 Remove the screws and then separate the power brk assy 15 Remove the screws and then separate the SMPS 4 Remove the screws 11 and then separate t...

Page 76: ...Auto Ref Keratometer CRK 1 75...

Page 77: ...l Voltage O K Check fuse in the bottom side Take off the head cover 1 Check whether the cable from SMPS to Main Board is inserted well 2 Check the voltage 12V of connector b y using DMM CN1 Pin No 6 1...

Page 78: ...RK 1 77 Take off the head cover Check whether the cable from Mainboard t o LCD is inserted well Mainboard CN18 No Connection is OK Make correct connection Yes External LCD is O K Replace the Mainboard...

Page 79: ...spec ially end of paper Take off the cover 1 Check whether the cable from Mainboard to LCD is inserted well 2 When pressing the button check whethe r the voltage goes to L level Default is H igh Does...

Page 80: ...paper is not fed correctly Take off the head cover Unconnect the cable from mainboard to the thermal printer board Connect new printer module to mainboard then execute printing again No Printing OK R...

Page 81: ...Auto Ref Keratometer CRK 1 Phenomenon 6 Cannot see the eye fixation target Take off the head cover Take off the optic cover Check whether led is out Is LED out Replace Mainboard Replace LED board No Y...

Page 82: ...ng bright spot i s some that out focused Enter into REF TEST MODE in engineer mode Enter into CCD mode 1 Check Ring image is correct 2 Defocus very slightly until showing som e other light we call it...

Page 83: ...tion There is also another method called accommodation paralysis method Me chanic myopia occurs more easily in the case of the youth Additionally the accommodati on of eye is one of the functions of t...

Page 84: ...ens of glasses western people 3 Cylinder Form There are three kinds of cylinder form A form displaying the data using minor meridian Refraction power of the minor meridian is displayed as SPH and the...

Page 85: ...in User Setup Mode 4 Axis Axis is expressed counterclockwise from the ear side of the left eye as the origin shown in the figure below 5 Pupil Distance PD Pupillary distance PD is the distance betwee...

Page 86: ...n PRINT EYE ON in t he Page 3 4 of the SETUP MODE See the following table and diagram for further infor mation Classification of Data NORMAL MYOPIA HYPE ROPIA ASTIGM ATISM NORMAL 0 5 S 0 5 0 5 C 0 0 M...

Page 87: ...TISM 0 5 S C Eyeball Output by REF Measurement a EMMETROPIA NORMAL e MIXED ASTIGMATISM b MYOPIA NEAR SIGHTEDNESS f HYPEROPIA FAR SIGHTEDNESS c SIMPLE MYOPIC ASTIGMATISM g SIMPLE HYPEROPIC ASTIGMATIS M...

Page 88: ...Auto Ref Keratometer CRK 1 87 MATISM Diagram of the eye ball output by REF Measurement...

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