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Huvitz HRK-8000A, Service Manual

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Huvitz HRK-8000A Service Manual Download Page 52

---------------------------------------------------------------------------------------------- Auto Ref/Keratometer HRK-8000A    51

 

 

 

 

4-2-3. Disassemblying the LCD assembly 

 

 

 

 

 

(1) Removal Method 

 

Remove the screws and then remove the lcd-cable-cover(9). 

 

Remove the screws and then remove the lcd-hinge-assy-L,R(14,15). 

 

Remove the screws (1) and then remove the lcd-back-case(8). 

 

Remove the screws (5) and then remove the lcd-guide-2(4). 

 

Remove the screws and then remove the lcd-bracket(3). 

 

Remove the screws and then remove the lcd-fixer(2). 

 

Now you can separate lcd(13) and lcd-front-case(10). 

 

(2) Point for Assembly 

 

Assembly is the reverse procedure of disassembly

. 

 
 
 

 

 

 

 

Summary of Contents for HRK-8000A

Page 1: ...Service Manual Auto Ref Keratometer HRK 8000A...

Page 2: ...publication has been carefully checked and is believed to be entirely accurate at the time of publication HUVITZ assumes no responsibility however for possible errors or omissions or for any conseque...

Page 3: ...age less than 250Vac minimum 6A Type SJT or SVT 18 3AWG 10A max 3 0m long One end terminates with blade attachment plug HAR Type NEMA 6 15P This product may malfunction due to electromagnetic waves ca...

Page 4: ...ls 6 3 Environment Factors 7 4 Safety Precautions 9 III Product Outline 11 1 Nomenclature 11 2 Optical System 13 3 Electrical System 16 4 Mode Setting 24 5 Principles of Measurement 25 IV Repair Stand...

Page 5: ...he information in this publication has been carefully checked and is believed to be entirely accurate at the time of publication Huvitz assumes no responsibility however for possible errors or omissio...

Page 6: ...operator It is for this reason that the following safety notices have been placed appropriately within the text of this manual to highlight safety related information or information requiring special...

Page 7: ...uired to do the protective ground to the conductive section in the equipment of class I for the purpose of safety UL60601 1 CAN CSA C22 2 NO 601 1 MEDICAL EUIPMENT WITH RESPECT TO ELECTRIC SHOCK FIRE...

Page 8: ...requently Normal temperature for operation of the machine is at the range of 10 C 35 C and the humidity is at the range of 30 70 Do not disassemble or open the machine The manufacture shall have no re...

Page 9: ...1060hpa For the Transformation of the machine please keep the ambient temperature is 40 70 humidity is 10 95 and atmospheric pressure is 500 1060hpa For the Storage of the machine please keep the amb...

Page 10: ...er splashes drips or sprays Do not place containers containing fluids liquids or gases on top of any electrical equipment or devices 3 The equipment must be operated only by or under direct supervisio...

Page 11: ...ate for the receptacle socket If you cause any damage to a cable connector s or receptacle s let the damage s be repaired by an authorized service technician 12 Please do not pull on any cable Always...

Page 12: ...ement Button Performing the measurement by pressing it after focusing 3 Operation Lamp Indicates whether or not the electric power is on 4 Display Monitor Monitor for measurement 5 Chinrest up down bu...

Page 13: ...connecting to the exterior equipment 3 Exterior Monitor Connection Connector Connecting into the exterior monitor 4 Clamping Bolt Fixing the system stage 5 HDMI Connector Connecting into the HDMI cab...

Page 14: ...Auto Ref Keratometer HRK 8000A 13 3 2 Optical System...

Page 15: ...ction mirror 6 polarizing beam splitter 7 reflection mirror 8 polarizing filter 9 collimation lens 10 diffuser 11 light source R 12 objective lens 13 insert lens high diopter 14 image lens 15 MLA micr...

Page 16: ...light source 11 10 9 8 7 6 5 1 1 Projection system of the REF measurement 1 5 1 6 12 13 14 15 16 Illumination system of the light source for Retro Illume observation 11 10 9 8 7 6 5 1 1 Image capturi...

Page 17: ...stem functional block diagram AC 100 240 Power switch DPST SMPS DC Output 5V 4A 5V 2A 12V 1 8A Dual Line Fuse SMPS Output DC12V 8 3A MOTER INTERFACE BOARD JP1 JP7 JP9 JP3 JP2 JP10 JP8 JP5 JP4 DC12V DC...

Page 18: ...Auto Ref Keratometer HRK 8000A 17 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 8 3A...

Page 19: ...18 Auto Ref Keratometer HRK 8000A 3 3 2 Electrical wiring 3 3 2 1 Main Board FPGA CPU FLASH SRAM SRAM SRAM SRAM SDRAM 1 2 9 3 8 7 6 5 4 10 11 12 13 14 15 16 17 dd dd d 18 19 20 21 22 23...

Page 20: ...CN4 EXT LED EXT ILM assy 9 CN13 Mire Ring LED Mire Ring Board CON1 10 CN9 Peripheral LED Peripheral assy 11 CN10 Main Power Base Interface Board CN24 12 CN23 RGB Out Base Interface Board CN8 13 CN31 H...

Page 21: ...20 Auto Ref Keratometer HRK 8000A 3 3 2 3 Base IO Interface Board 1 19 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 20 21 22 23 24 25 26...

Page 22: ...ard ass y 10 CN24 Power to Main Board Mainboard CN10 11 CN10 UART Interface 2 channel Extout Board 12 CN12 Printer Switch Input Printer Button Board CN1 13 CN18 RL Encoder Input Encoder Board ass y 14...

Page 23: ...Main assy CN2 B JP9 Motor board power Main assy CN11 C JP7 DC motor DC motor assy D JP3 Hi diopter motor diopter motor E JP2 REF PI chart lamp PI assy J2 chart lamp assy con1 F JP10 Ref LED Aiming VR...

Page 24: ...f Main Board ID Ref No Part name Description 1 U1 S3C2410 Samsung ARM CPU 2 U33 A3P1000 FG484 Actel FPGA Logic Array 3 U31 SAA76113 Video Decoder 4 U37 MDIN 241 Deinterlacer with HDMI Out 5 U3 39VF640...

Page 25: ...ntent of table Start Key Description Printer Button S W Upgrade Mode Download OS program into ROM via serial port ex COM permanently After downloading always HRK 7000A will start with new OS program J...

Page 26: ...he examinee s eye is emmetropia hyperopia or emmetropia the reflected light from the retina is parallel to the optic axis of the eye diverge or converge respectively 3 The light beam reflected from th...

Page 27: ...26 Auto Ref Keratometer HRK 8000A Objective Lens Image Lens MLA Micro Lens Array TV Camera...

Page 28: ...inor 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 obtained f...

Page 29: ...28 Auto Ref Keratometer HRK 8000A Ring type light source for measuring Mire Ring TV Camera Lens for measuring...

Page 30: ...itreous humor and some of it go through the crystalline lens and the iris If it is captured by TV camera any turbid part of the transparent vitreous humor lens and cornea can be observed 3 5 3 2 Usage...

Page 31: ...wait several seconds until the measure screen in REF mode is displayed Press the button and touch screen in following orders 1 Press Printer button 2 Touch the right of the screen of the area of meas...

Page 32: ...output 4 Stored in FRAM Setup To import data LOAD DATA Press When loading is complete continuous beep sound is output 4 1 3 REF data set REF Test Mode A Start REF Test Mode in the Engineer mode B The...

Page 33: ...to the delimited area shown in yellow 9 INCR After the capture when applied Threshold increases the level of Threshold In R LED camera mode Increases the brightness of REF LED illumination 10 DECR Aft...

Page 34: ...and check the new video that is applied new level F Check the measurements of REF in the following ways 1 Select the K CCD camera mode focus on the model eye 2 Select the R CCD camera mode 3 Press bu...

Page 35: ...ild is 1 DIOPT diopter of model eye 2 GX average horizontal distance of REF Spots 3 GY average vertical spacing of REF Spots 4 SPH Spherical coefficients of the Zernike 5 CYL Cylinder coefficients of...

Page 36: ...n the screen Continuous press K CCD ALIGN CLIP mode switches 2 ALIGN Guide lines for the alignment of the mire ring and the LED signal displayed on the screen 3 CLIP Output calculated KER data in real...

Page 37: ...ck to set up Focus 7 In the same way of 6 all five steps to set up a Focus 8 Upon completion of the entire Focus setup setup of the model eye proceeds KER D KER in the following ways to proceed to the...

Page 38: ...s engineer mode is stored in the SAVE DATA 4 1 6 Check the setup data KER KER Setup Data A Begin KER Setup Data in the engineer mode B Verify the data of KER model eye 1 DIOPT Diopter of the Model eye...

Page 39: ...2 ALIGN Select the motor to move to the center position 3 FOCUS Auto tracking begins 4 FCW Select a clockwise direction to the motor Clock Wise direction to drive a period of time 5 FCCW Select a cou...

Page 40: ...wing ways to perform the sort 1 X HEAD Y BASE Z HEAD select the item ON 2 ALIGN button select the drive axis to move to the center position F The following is an automated tracking tests 1 Mount the m...

Page 41: ...or of the optical base section 3 Z HEAD The optical head portion of the Z axis drive motor C For each of the motors are the following configurable items 1 BASE DUTY Motor Power of main drive 2 MOVE LU...

Page 42: ...otor drive on the offset of the center of the range of values D For each set of items set the left and right side of the value or click the plus sign E After the Motor Setup engineer mode is stored by...

Page 43: ...ing 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 update interval of the slit is measu...

Page 44: ...ate SAVE button and press Save If you are not adequate adjust the offset of the slit spacing and try again seen D After PD Setup engineer mode by pressing the SAVE DATA is stored 4 1 10 Measuring Pref...

Page 45: ...is the range of pixels in the direction of Focus 8 FOCUS YA Y direction pixel Focus Range 9 FOCUS ZF Z direction of the front side pigeoman direction and the pixel range of Focus 10 FOCUS ZR Z direct...

Page 46: ...DPC function is off 3 CAMERA KER CCD Camera Color CCD and is one of the select Selected camera is displayed on the screen of the kind 4 COLOR Dead Pixel color is selected as one of the White and Blac...

Page 47: ...ER CCD s Black Pixel in 3 COLOR CCD s White Pixel 4 COLOR CCD s Black Pixel in E After DPC Setup engineer mode by pressing the SAVE DATA is stored F HRK 8000A restarts and were being corrected by the...

Page 48: ...ram will show the following screen 6 Select Serial Port Transmit menu then File Dialog box pops up 7 Choose HRK_test bin file then press OK button 8 After downloading turn off and on the HRK 8000A 9 C...

Page 49: ...ews 4 of the Main body 9 and then separate the Head Rest Assy 11 2 Remove the BOLTCAP 5 10 the screws 2 and then separate top cover 6 3 Remove the screws and then separate left cover 8 and right cover...

Page 50: ...and then separate the m front case assy 6 6 Remove the screws 1 and then separate the m middle case assy 7 7 Remove the screws 1 and then separate the m back case assy 5 8 Remove the screws 2 and the...

Page 51: ...then remove the LCD ASSY 6 Remove the screws and then remove the OS ASSY 8 Remove the screws and then remove the XZ STAGE ASSY 9 Remove the screws and then remove the IF PCB BRACKET ASSY 5 Remove the...

Page 52: ...en remove the lcd hinge assy L R 14 15 Remove the screws 1 and then remove the lcd back case 8 Remove the screws 5 and then remove the lcd guide 2 4 Remove the screws and then remove the lcd bracket 3...

Page 53: ...then separate the MAIN PCB 7 Remove the screws and then remove the LCD GUIDE 4 Remove the screws and then remove the OS FRONT FRAME 2 Remove the screws and then remove the OS BACK FRAME 3 Remove the s...

Page 54: ...COVER 12 Remove the screws and then separate the BASE COVER ASSY 13 Remove the screws and then separate the SMPS ASSY 16 Remove the screws and then separate the CONNECTOR MAIN BRKT 14 Remove the screw...

Page 55: ...reference ring is not displayed The aiming spot is not displayed The anterior part of eye is not displayed 3 Troubles related with measurement NO TARGET is displayed OVER SPH is displayed OVER CYL is...

Page 56: ...stered well 2 Check the voltage 5V of connector by using DMM Please refer to 3 3 section of Service Manual for Electrical Wiring Voltage 5V OK Take off the head Top cover Replace Main Board In this ca...

Page 57: ...LCD Monitor 1 Main Board to LCD Moniter 2 Interface Board to LCD Inverter Board Please refer to the Service Manual for Electrical Wiring Does all connections are OK Yes Check voltage of the cable fro...

Page 58: ...the cover Check the cable of mainboard with Key or Joystick When pressing the button check whether the voltage goes to L level Default is H level Does the level goes to L 0V Yes Replace Main Board No...

Page 59: ...ing result is OK Yes Remove printer cover from the body front cover Replace the thermal printer module through hole at right side of body front cover Unconnect the cable from IO Board to the thermal p...

Page 60: ...y of TEST MODEL EYE is very different from the original value when the focusing bright spot is somewhat out focused Enter into REF TEST Enter into TEST MODE Enter into CCD mode by pressing CCD button...

Page 61: ...rease DIST CONST of the direction Moving too slow around focus Moving too fast or Passing away the focus Increase PWM BASE of the direction 1 or 2 steps Increase DIST CONST of the direction Decrease P...

Page 62: ...RK 8000A 61 Phenomenon 9 Chin rest movement is not working Press Up or Down button for Chin rest movement in measure mode Not moving on any direction Yes No Okay Check the height level of chin rest Co...

Page 63: ...to the eyesight of examinee Foggy method is the method that the size of the target is modified to be greater than the eyesight of the examinee by 1D 2D in order to reduce the error caused by this acco...

Page 64: ...according to examinee in User Setup Mode VD 0 0mm hard contact lens VD 12 0mm lens of glasses oriental people VD 13 5mm lens of glasses western people VD 15 0mm lens of glasses western people 3 Cylind...

Page 65: ...RK 8000A and minor meridian is displayed as CYL MIX sign will be attached in the case of the myopic astigmatism whereas sign in the case of the hyperoptic astigmatism The above mentioned option can be...

Page 66: ...in the figure below 5 Pupil Distance PD Pupillary distance PD is the distance between the centers of the lenses of glasses Conveniently it is said that the distance between the pupils is the distance...

Page 67: ...of the SETUP MODE See the following table and diagram for further information Classification of Data NORMAL MYOPIA HYPER OPIA ASTI GMA TISM NORMAL 0 5 S 0 5 0 5 C 0 0 MYOPIA S 0 5 0 5 C 0 0 SIMPLE MYO...

Page 68: ...RMAL e MIXED ASTIGMATISM b MYOPIA NEAR SIGHTEDNESS f HYPEROPIA FAR SIGHTEDNESS c SIMPLE MYOPIC ASTIGMATISM g SIMPLE HYPEROPIC ASTIGMATISM d COMPOUND MYOPIC ASTIGMATISM h COMPOUND HYPEROPIC ASTIGMATISM...

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