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Auto Tonometer Service Manual

1. Motor Fig 5 16 or position sensor Fig 5 12 defective or mechanical interference with movement in the DOWN direction 30 Z MOTOR Homing OUT ERROR Motor Fig 5 16 or position sensor Fig 5 12 defective or mechanical interference with movement in the patient s direction Quick Reference Guide Fig 4 7 13910 851 Optical Head Assy Disc d Disconnected or intermittent connections Check Fig 5 35 13900 945 Motor Board Assy crimp joints and continuity from pin to pin Fig 4 27 13910 922 Power I O Board Fig 4 12 13900 921 Control Board Assy Continued on next page 13910 103 Rev Page 11 TROUBLESHOOTING Error Code Table Model 13912 only Code Definition Probable Cause 1 CPU diagnostic Defective Main Board Fig 3A 36 2 RAM diagnostic 1 Defective Main I O Board Fig 3A 36 3 PROM diagnostic failed Defective Main I O Board Fig 3A 36 4 diagnostic failed Defective Main I O Board Fig 3A 36 5 EEPROM diagnostic failed Defective Optical Head Assy Fig 4 7 6 X motor failed eese J1 Fig 5 35 Disc d J8 J10 or J12 Fig 5 35 Disc d X Y Z Motor Connectors Interchanged U5 U6 U7 Fig 5 35 FPGA Chip Not Seated Properly Defective Motor Data
2. 555 Auto Tonometer Service Manual Ophthalmic Instruments TABLE OF CONTENTS introduction dmt ete e 4 Reichert ASSISTANCE d eren teh hats a e erre eere AN e e e 4 Warnings amp Cautions o aree ien ar ie e iio sai bebe e ane ants 5 Theory Of OPTa ON titt ae cedi teet tee die Et eri 6 Troubleshooting Error Codes 13910 8 13911 Only 2 oret edere Pe D eco ed oT Ped 10 Error 0468 13912 5 rene i dt er i da dead o ded ann D HR 12 Error Gode Table tented on ed Re e tle tete dia rete 10 SY EIC SM 14 Testing Introduction n ite eate d ee e tai o te ie 16 Special Tools amp Equipments n feto ete died iei eir i e etta 16 Brightness Adjustment rete cete aad e d e eie e o dale us 17 LGD Contrast Adjustmerit 255254 414018 e ehe ed e e adh e ene d E re E edd 17 Test Point 7857 18 Calibration Special Tools and Equipment 2 2 tiet d entere 29 Pressure Delivery Ramp Calibration 2 nennt nter 30 Fixation Alignment s nia Eo dece ton bito eee ton Bo rio eoo boe dene 30 Optical Altgnmefit eec tte OM ROGER ER POCHE PEDE ONDE ERE De DRE 31 aito roo tiep
3. 8 Bi e ir Figure TT 5 Main Control Circuit Board Layout 13910 103 Rev B Page 25 TESTING SUOd POS TET OSPIA OL Figure TT 6 Main Control Block Diagram 13910 103 Rev B Page 26 TESTING Conrinuep N A EE a m a o sO ite a e 1O gt gt i Figure TT 7 Motor Control Circuit Board Layout J13 13910 103 Rev Page 27 TESTING EIER 15157785 c vam WOH er sojoajep eon fi il A HORI W From Board Figure TT 8 Motor Control Block Diagram 13910 103 Rev Page 28 CALIBRATION Special Tools and Equipment Note Before performing any calibration of this instrument it is recommended that you read and fully understand the information provided in this manual Note Before performing any calibration of this instrument per form the steps in Disassembly Note Attach the Left Right Harness Assembly to its mating connector from the harness connected to the Motor Control Circuit Board at J13 or the unit will not be able to acquire readings duri
4. 6 For 13912 Models Only a Press the button below the MODE icon and then press the button below the SERVICE icon b Pressthe button below the SERVICE icon again c Enter the password 14213 to enter the calibration mode Page 29 CALIBRATION Conrinuep Pressure Delivery Ramp Calibration This procedure provides instructions for measurement of the air Pressi 644 Time lt ms gt 12 00 puff solenoid drive current 1 While in the Services Menu screen press the button below the DOWN ARROW icon until CAL VER is highlighted Press the button below the SELECT icon 2 Pressthe button below the DOWN ARROW icon until SOLENOID is highlighted Press the button below the SELECT icon 3 After the unit puffs a graphical representation of the pressure ramp will appear on the screen The graph line must pass through the alignment dots on the screen Refer to Figure CT 1 Note If the applanation curve does not pass through the dots remove the Tonometer Head Cover and adjust the potentiometer which is labeled SOLENOID CUR RENT ADJUST on the tonometer circuit board until the curve passes through the alignment dots on the screen as best as fits the curve To generate a new curve press the button below the DEMO icon Repeat as Er required Refer to Figure CT 2 8 CURRENT AD 4 Pressthe button below the RETURN icon d B Figure CT 2 Solenoid Current Adjustment Pot
5. Tonometer Alignment This procedure provides the steps to adjust the gain value for the applanation voltage of the measurement system A value too high will cause saturation of the peak voltage and a value too low will cause asterisk readings Note This value is set at the factory and will not require mod ification unless components relating to the applanation gain are replaced and or damaged 1 Press the button below the SELECT icon while the Ton Align is highlighted The tonometer applanation test screen will become active 2 This screen displays the software controlled Applanation Gain Value This number peak amplitude value may be adjusted using the UP DOWN arrows after the Optical Alignment and Fire Around tests is performed Note If the Appl Gain Value is set too high saturation of the voltage signal may occur and cause inaccurate read ings 3 Ifthe Appl Gain Value was changed press the button below the SELECT icon to save the number to memory 4 Press the button below the RETURN icon to return to the Service Menu screen 5 Repeat the Fire Around test in this section APPLANAT ION 9 034 PRESSURE 9 096 Appl Gain Value Figure 10 Applanation Gain Screen 13910 103 Rev B Rubber Eye Calibration The rubber eye calibration test sets and or checks the IOP mea surements of the instrument so that it will provide readings within the tolerances of the calibrated rubber eye fixture CAU
6. ESDS WHICH ARE SENSITIVE TO STATIC HIGH VOLTAGES STORED IN AND TRANSFERRED BY THE HUMAN BODY OBSERVE CORRECT ESDS PRECAUTIONS OR PRE MATURE MALFUNCTION OF THIS INSTRUMENT WILL OCCUR 1 Place the instrumentin an area that has ESDS protection and observe the appropriate precautions 2 Apply the correct input power to the unit as shown on the data plate of the unit When instructed press any button to continue Refer to Figure AS 1 for an illustration that shows the location of the Data Plate 3 Pressthe button below the MODE icon Then press the button below the SERVICE icon to access the calibration information Record the software version calibration date and the total number of measurements 4 Remove the input power to the AT555 5 For 13910 and 13911 Models Only 8 Openthe printer door by pushing on it above the printout opening b Installthe correct version of the Service Software into the PCMIA slot Refer to the Special Tools amp Equipment section for details of the correct Service Software PCMIA card c Align the printer paper in the door slot and close the Printer Door d Referto the General Disassembly section of this procedure and remove the side and top covers e Applythe correct input power to the unit as shown on the data plate of the unit When instructed press any button to continue f Press the button below the MODE icon Then press the button below the SERVICE icon to access the Services Menu
7. HIGH VOLTAGES STORED IN AND TRANSFERRED BY THE HUMAN BODY OBSERVE CORRECT ESDS PRECAU TIONS OR PREMATURE MALFUNCTION OF THIS INSTRUMENT WILL OCCUR Before internal troubleshooting can occur the top and side covers of the instrument must be removed Refer to the Disassembly section of this manual for the details The Optical Head Assembly has a warranty seal installed over an attaching screw that secures the optical head cover Removing the seal from this screw voids warranty unless pre authorized from an Reichert Cus tomer Service Representative Special Tools amp Equipment The following special tools and equipment are necessary to perform the steps in this section Digital Voltmeter 50 to 50 VDC Digital Oscilloscope Digital Real Time 1GHz 13910 103 Rev TESTING LCD Brightness Adjustment P Ns 13910 and 13911 only This procedure details the adjustment of the brightness for the LCD backlight This adjustment is located on the Power Input Output Board Fig 4 27 circuit board on bottom of unit Refer to Table 1 for the voltages required at TP9 To determine which LCD you have and are replacing refer to Figures 1 and 2 Note For P N 13912 the brightness and contrast are software controlled and do not require any voltage adjustment 1 Apply the probe of a digital voltmeter to TP9 on the bottom circuit board and the probe to pin 5 of the RS232 connector located next to the inp
8. side covers Figure AS 5 Top Cover Screws Installation Figure AS 6 Headrest Installation Page 46 13910 103 Rev B APPENDIX A GENERAL SPECIFICATIONS Specifications Height 17 in 43 0 cm Width 9 1 2 in 24 0 cm Depth 13 1 2 in 34 0 cm Weight unpacked 30 Ibs 13 6 kg Voltage Catalog No 13910 100V to 120V Catalog No 13911 220V to 240V Catalog No 13912 100V to 240V Current Model 13910 1 0 amp Model 13911 0 5 amp Model 13912 1 0 amp Frequency 50 60 Hz Measurement Range 0 60 mmHg Transportation amp Storage This instrument can withstand the following conditions while packed for transportation or storage anambient temperature range of 40 C to 70 C arelative humidity range of 1096 to 9096 anatmospheric pressure range of 500 kPa to 1060 kPa Exposure to these extreme conditions indicated above should not exceed 15 weeks Disposal This product does no generate any environmentally hazardous residues At end of product life follow local laws and ordinances regarding proper disposal of equipment This product does no generate any environmentally hazardous residues At end of product life follow local laws and ordinances regarding proper disposal of equipment 13910 103 Rev B Page 47 APPENDIX B HARNESS CONNECTION LIST FROM DESCRIPTION PART NUMBER 13900 945 MOTOR CONTROL PCB all 13900 945 J2 13960 938 HOME SWITCH ASSY HARNESS 13900 945 J8 13920 948 MOTO
9. 13910 13911 13900 922 J1 13900 921 J2 TONOMETER DATA HARNESS 13900 935 13900 922 J2 13900 111 SOLENOID ASSEMBLY 13900 858 13880 922 J3 13912 925 J1 TONOMETER POWER HARNESS 13880 936 13900 922 J4 J5 13900 932 CAMERA POSITION HARNESS 13960 947 13900 922 J7 J8 13900 928 POSITION ILLUMINATOR 13900 928 13900 922 J9 13900 925 FIXATION ILLUMINATOR 13900 937 13900 922 J10 13900 926 APPLANATION EMITTER 13900 938 13900 927 APPLANATION DETECTOR 13900 930 TOUCH SENSOR 13900 931 PROXIMITY DETECTOR 13900 949 PATIENT LED S 13910 13911 ONLY 13900 922 J13 13900 943 Z TRAVEL SWITCH 13900 943 TONOMETER HEAD ASSEMBLY P N 13912 13880 922 J1 1391 2 925 J2 TONOMETER DATA HARNESS 13880 937 13880 922 J2 13900 111 SOLENOID ASSEMBLY 13900 858 13880 922 J4 J5 13880 924 CAMERA POSITION HARNESS 13960 947 13880 922 J7 J8 13900 928 POSITION ILLUMINATOR 13900 928 13880 922 J9 13900 925 FIXATION ILLUMINATOR 13900 937 13880 922 J10 13900 926 APPLANATION EMITTER 13880 938 13900 927 APPLANATION DETECTOR 13880 922 J14 13880 048 TOUCH PLATE ASSY 13880 940 13960 949 13880 922 J15 13880 939 PROXIMITY DETECTOR 13880 939 13880 922 J16 13880 923 PATIENT LED S 13880 923 13910 103 Rev B Page 49 APPENDIX SOFTWARE REVISION LIST Model 13910 and 13911 Revision 1 20 Initial release Revision 1 20 to 1 21 1 03 Change Leica name to Reichert name on opening screen Reword the Tou
10. 732 Multi Purpose Sealant Board Removal Refer to Figure R4 2 for the layout of the circuit board 1 Disconnect the earth ground connection from under the Tonometer Head 2 Disconnect the power connector J1 and the data harnesses J2 at the Power I O Circuit Board also referred to as PIOB that connects to the Tonometer Head 3 Disconnect the power harness J12 and the data harness J5 on the PIOB that connects to the Motor Board CAUTION DO NOT TO CUT INTO THE WIRES THAT SECURE THE WIRES TO THE XYZ POSITIONING SYSTEM 4 Cut the plastic wire tie that secures the wires to the XYZ Positioning Assembly 5 Remove the four screws washers and nuts that secure the XYZ Positioning Assembly to the Mounting Base Separate the XYZ Positioning Assembly and Tonometer Head assembly from the Base Casting Set the XYZ Positioning Assembly on its side next to the Base Casting 6 Disconnect the power connector J11 and the data harness J7 at the PIOB that connects to the LCD screen 7 Disconnect the power connector J3 and the data harness J4 at the PIOB that connects to the Printer Assembly 8 Disconnect the power connector J10 at the PIOB that connects to the Power Supply 9 Disconnect the data harness J7 at the PIOB that connects to the Keypad Assembly 10 Remove the two standoffs and lock washers that secure the 9 pin computer interface connector to the Power Identifica tion Panel 11 Remove t
11. Assembly completely out of the Latch Fig 3 11 using a pair of pliers Note Do not lose the insulation bushings that are installed Refer to Figure R3 1 between the Touch Plate and the Spring Tubes 2 Puta cut in the middle of the top and bottom sides of the 2 Press the top and bottom of the Nosepiece Cover together exposed part of the empty latch Refer to Figure R3 2 until the locking tabs release from the Rear Mask Referto Using a needle nose plier hold one side of the exposed part Figure R1 1 for an illustration of the location of the Rear of the Latch and push it toward the center and at the same Mask time pull it out so that it releases on one side 4 Repeat the above step for the other side of the empty Latch When the side releases the latch should pull completely out of the unit 5 Install a new Latch by carefully pushing it into the hole Figure R1 1 Nosepiece Cover Removal 3 Install the new Nosepiece Cover onto the Rear Mask from Figure R2 1 Latch Fingers which the old one was removed Note sure that the Nosepiece Cover is installed flat Cut Sides againstthe Rear Mask or it may apply sid pressure to the tip ofthe airtube causing misalignment of the air delivery system that will effect the readings by displaying asterisk readings or no applanation on the LCD Figure R2 2 Latch Removal 13910 103 Rev B Page 39 REPAIR 3 Printer Removal This section details the steps necessary to rep
12. Slide the Left Right Headrest Assembly fully to the other side Press the measure button and take three readings for the low eye 6 Press the button below the PRINT icon 7 Repeat the three previous steps for both the medium and high rubber eyes 8 Compare the results to the calibration sheet that you received with your rubber eyes and ensure that the readings are within specifications If the readings are not within specifications repeat the tests in this section to correctly calibrate this unit 9 Move the calibrated rubber eye away from the air puff nozzle Place your finger approximately 0 5 inch 1 3 cm in front of the air puff nozzle and press the measure button The tonometer should move toward your finger without touching it and then display Too Close Note If the tonometer touches your finger with it held still the proximity sensor may not be working correctly If the proximity sensor is not working correctly please call Reichert at the number given in the Introduction section of this procedure 10 Place your finger onto the metal surface of the grey plate that surrounds the Nosepiece Cover and press the MEASURE button The LCD must display Touch Sensor Activated Note If the tonometer moves forward when the metal surface of the touch sensor is touched then it is not working cor rectly If the touch sensor is not working correctly please call Reichert at the number given in the Introduction section of thi
13. THE HARNESS CLIP OR DAMAGE TO THE UNIT MAY OCCUR CAUSING THE LEFT RIGHT DETECTOR TO STOP OPERATING Figure DS 2 Disconnect Left Right Harness 6 Remove the two upper screws on the operator side and one screw on the patient s side that secures the side covers Remove the side covers disconnect the Left Right Harness and place them in a safe location for storage Refer to Figure DS 5 Figure DS 3 Top Cover Screws Removal Screws Side Screws Figure DS 5 Upper Side Cover Screws Figure DS 4 Lower Side Cover Screws 13910 103 Rev B Page 37 REPAIRS Introduction List of Repairs This section contains the repair procedures Repair 1 Nosepiece Cover Replacement Names given to parts are the same parts as referenced in the Repair 2 Printer Door Latch Replacement AT555 Parts Manual P N 13910 102 Repair 3 Printer Replacement Perform all steps in Disassembly before performing any of the fol Repair 4 Power I O Circuit Board Replacement lowing repair procedures unless otherwise instructed For 13910 and 13911 Models Only After the necessary repairs are completed perform all steps in the Repair 4A Power I O Circuit Board Replacement Assembly section of this manual unless otherwise instructed For 13912 Model Only Repair 5 Control Circuit Board Replacement For 13910 and 13911 Models Only Special Tools amp Equipment No Control Board in Model 13912 None Required Repair 6 Motor Circuit Board Replacement Repair 7 LC
14. TO STATIC HIGH VOLTAGES STORED IN AND TRANSFERRED BY THE HUMAN BODY OBSERVE CORRECT ESDS PRECAUTIONS OR PREMATURE MALFUNCTION OF THIS INSTRUMENT WILL OCCUR Control Board Removal 1 Remove the plastic tie wrap that secures the wires to the J2 connector and remove the J2 harness from the connector 2 Remove the two screws that attach the Control Circuit Board CCB to the XYZ Positioning Assembly 3 Remove the two screws that secure the Printer Mount on the CCB side of the unit Loosen the other two screws so that the Printer Mount can move forward on the CCB side of the unit 4 Remove the CCB from the unit 5 Remove the standoffs from the top side of the CCB 6 Observing ESD precautions remove the new CCB from its antistatic bag and install the standoffs onto the new CCB If the new CCB does not have a chip in the U18 socket remove it from the damaged CCB and install it onto the new CCB Control Board Installation 1 Place the new CCB onto the Power I O Board and align the reset button into its hole and the top of the CCB into its slot on the back side of the Printer Mount Carefully press the CCB into its mating connector on the Power I O Board Note Before installing the screws that secure the CCB install aPCMIA card into the slot to ensure that it does not bind Remove it when aligned 2 Install the two screws that secure the CCB to the XYZ support bracket 3 Attach the data harness J2 to the CCB 4 Sec
15. and install the four screws washers and nuts that secure it to the Base Casting Note Ensure that the Control Board side circuit board attached to the XYZ Positioning Assembly is correctly placed into its slot on the Printer Mount so that when a PCMIA card is installed into the slot it does not bind 9 Attach the data harness J11 and the power connector J6 from the Motor Board to the PIOB 10 Attach tonometer power connector J13 to the PIOB 11 Attach the earth ground harness from the Base Casting to the terminal lug on the bottom of the Tonometer Head near the LCD 12 Secure the earth ground wires and the transformer input power harness to the tie wrap mount on the side of the XYZ support bracket using a plastic tie wrap 13 Perform the steps in the LCD Adjustment section of this manual so that the correct voltages are set on the PIOB for the LCD assembly 14 Perform the steps in the Assembly section of this manual Page 42 REPAIR 4A Power Circuit Board Replacement For 13912 Model Only This section details the steps necessary to remove replace the Power I O Circuit Board CAUTION THE INTERNAL CIRCUITS OF THIS INSTRUMENT HAVE ELECTROSTATIC DISCHARGE SENSITIVE DEVICES ESDS AND ARE SENSITIVE TO STATIC HIGH VOLTAGES STORED IN AND TRANSFERRED BY THE HUMAN BODY OBSERVE CORRECT ESDS PRECAUTIONS OR PREMATURE MALFUNCTION OF THIS INSTRUMENT WILL OCCUR Special Tools and Equipment Dow Corning RTV
16. calcu lated and it is then displayed on the Liquid Crystal Display LCD Applanation System The applanation system consists of an infrared emitter 875 nm and detector placed so that the energy from the emitter is directed obliquely toward the cornea The detector is placed tangentially from the emitter so that light reflected from the flattened cornea will be directed to the detector An undisturbed cornea non applan ated will direct very little amounts of infrared light toward the detector As the curvature of the cornea starts to applanate by the air pulse the infrared light increases to the detector until maxi mum level is detected at the exact instant of flattening e g appla nation This is followed by a rapid decrease in the amount of infra red light detected as the cornea becomes slightly concave At the exact instant of applanation the pressure is recorded and the IOP reading is displayed on the LCD screen Page 8 Proximity Detector The proximity detector is a sensor that is attached to the end of the airtube This circuit prohibits the air tube from contacting the eye This circuit contains an oscillator and its associated circuitry to detect external capacitance the human body or an eye which is within approximately 1 4 of the cornea near the airtube This circuit contains a copper ring and two semicircular rings surround ing the end of the air tube The capacitance between these rings will change with reg
17. heri dci t i e bete deas 46 AS 3 Wire Harness Retaining 46 5 4 Top Cover Alignirient sia ttt rc ett diva id b avila vita avira sae 46 AS 5 Top Cover Screws Installation sese nennen tenente tenente tenens 46 AS 6 Headrest Installation ertet ie cepe t ea d e e tas 46 13910 103 Rev B Page 3 INTRODUCTION This document contains the instructions for performance repair calibration and alignment of the AT555 Auto Tonometer catalog items 13910 13911 and 13912 The Service Software for the calibration and alignment procedures in this manual is provided on a PCMIA card P N 13900 954 for catalog items 13910 and 13911 and is part of the unit software for the 13912 catalog number The information provided in this document has been prepared for trained service technicians who have attended the training course for ophthalmic instruments given by Reichert Inc Reichert Assistance The following list contains telephone numbers for the customer service personnel at Reichert Inc and the shipping address If you have questions regarding this document please contact a technical support representative as indicated below Customer Service Marie Valentine 716 686 4582 Christine Newton 716 686 4553 Fax 716 686 4555 Technical Support Ray Halbert 716 686 4584 Fax 716 686 4545 Main Switchboard Receptionist 716 6
18. s 22 TTA Power Input Output Block Diagram Model 13910 amp 13911 23 TT 4A Power Input Output Block Diagram Model 13912 24 5 Mam Gonto Circuit Board ee rad b e d E eus 25 TT 6 Man Control Block Diagram i o e P MD EUG 26 TT 7 Motor Control Circult Board Layout t aoo to s Po Pe oro P e Pe d S 27 TT 8 Motor Control Block Diagralri 4 e arte t 28 CT 1 Pressure vs Time Waveform c c e 30 CT 2 Solenoid Current Adjustment Potentiometer 30 CT 3 Fixation SpOt 30 CT 4 Fixation Spot Shadow irte eite t tie te ete nied egt cet tdt nd dte 30 CT 5 Glass Eye Fixture Installed ti e i e Pede 31 CT 6 Alignment Targets and Squares entente tentent tentent tenentes 31 CT 7 Tonometer Head Parts Identification eene 31 CT 8 Rubber Eye Fixture cr eee tt ape t oe cg dde eu aia ce dp ta 32 CT 9 Selection of Applanation Graph tte tese teet iens 32 CT 10 Applanation Gain Screen 33 CT 11 Rubber Eye Setup usto tee np n n c rp d d ep 34 CT 12 Rubber Eye Calibration Screen 34 CL
19. 1 Pear Mask WindOWS saci arr ae tr deg i e d ied o e De red n 36 DS 1 Left Right Headrest Removal 37 DS 2 Disconnect Left Right Hamess 37 DS 3 Top Cover Screws Removal 37 05 4 Lower Side Cover cede d le dd dnd 37 05 5 Upper Side Cover SCheWS sz i ntt erre rte er Ere e ER te 37 R1 1 Nosepiece Cover Removal 111 00 teen tentent tenerent tenete te tenentes 39 R2 1 Latch Fingers e e 39 R2 2 Lateh Remoyal dag Efe Ee a E ette Qe BUS Ed 39 R3 1 Printer Parts lD iuc o Pe tate nba ORE d deta E pr a adeb eer cett 40 R3 2 Printer Removal egt nt let d ege eats 40 R3 3 Printer Removal Step 2 5 neni vtero a eerte Rene yr m rs 40 R3 4 Printer Removal Step 3 sse 40 R4 1 Connector Locations Models 13910 amp 13911 Only 41 R4 2 Connector Locations Model 13912 Only 0 scseessesssseeesseeseeeeseeneeceseeneeeeseeneeeeseeneeesseeneeessneneeesseeessneess 43 AS 1 Lower Side Cover SCIeWS urus rondin ett aeree ne ne de beet dtd dtd det d eddie 46 AS 2 Upper Side Cover Screws
20. 7 Disc d J2 Fig 4 7 Disc d J8 Fig 4 7 Disc d Defective Optical Head Assembly 19 Undefined 3 a n te Not used in this instrument Continued on next page Page 12 13910 103 Rev B TROUBLESHOOTING Error Code Table Model 13912 only Continued Code Definition 20 21 27 28 29 30 31 32 Discd Disconnected or intermittent connections Check DAC I2C bus X MOTOR Homing STARTUP ERROR Y MOTOR Homing STARTUP ERROR Z MOTOR Homing STARTUP ERROR X MOTOR Homing IN ERROR Y MOTOR Homing IN ERROR Z MOTOR Homing IN ERROR X MOTOR Homing OUT ERROR Y MOTOR Homing OUT ERROR Z MOTOR Homing OUT Press Transducer Sys Out gt 125 Watch Dog not Functioning crimp joints and continuity from pin to pin 13910 103 Rev B Probable Cause Defective Tonometer Circuit Board replace the Optical Head Assembly Fig 4 7 J2 Fig 3A 45 Disc d J7 Fig 4 7 Disc d J8 Fig 4 7 Disc d Motor board Fig 5 35 or Main I O board Fig 3A 36 defective Motor board Fig 5 35 or Main I O board Fig 3A 36 defective Motor board Fig 5 35 or Main I O board Fig 3A 36 defective
21. 86 4500 Shipping Address Reichert Inc 3374 Walden Ave Depew NY 14043 2005 Reichert Inc All rights reserved Page 4 13910 103 Rev B WARNINGS amp CAUTIONS Reichert Inc is not responsible for the safety and reliability of this instrument when Assembly disassembly repair or modification is made by unauthorized dealers or persons Instrument is not used in accordance with its User s Guide Definitions Warning An instruction that draws attention to the risk of injury or death Caution An instruction that draws attention to the risk of damage to the product WARNING THIS INSTRUMENT IS NOT SUITABLE FOR USE IN THE PRESENCE OF FLAMMABLE ANESTHETIC MIXTURES SUCH AS OXYGEN OR NITROUS OXIDE CAUTION BEFORE TRANSPORTING THE AT555 THE INSTRUMENT MUST BE SET TO THE PARKED POSITION AND THE TRAVEL LOCK ENGAGED OR DAMAGE TO THE UNIT MAY OCCUR CAUTION ANY REPAIR OR SERVICE TO THE AT555 MUST BE PERFORMED BY EXPERIENCED PERSONNEL OR DEALERS WHO ARE TRAINED BY REICHERT INC SO THAT CORRECT OPERATION OF THE AT555 IS MAINTAINED CAUTION THIS INSTRUMENT HAS ELECTROSTATIC DISCHARGE SENSITIVE DEVICES ESDS WHICH ARE SENSITIVE TO STATIC HIGH VOLTAGES STORED IN AND TRANSFERRED BY THE HUMAN BODY OBSERVE CORRECT ESDS PRECAUTIONS OR PREMATURE MALFUNCTION OF THIS INSTRUMENT WILL OCCUR CAUTION MAKE SURE THAT THE VOLTAGE APPLIED TO THE UNIT IS THE SAME AS THE VOLTAGE THAT IS GIVEN ON THE DATA PLATE NEXT TO THE INPUT COR
22. 925 POWER MAIN PCB P N 13912 TONOMETER POWER HARNESS 13960 946 13912 925 J1 13880 922 J3 TONOMETER POWER HARNESS 13880 936 13912 925 J2 13880 922 J1 TONOMETER DATA HARNESS 13880 937 1391 2 925 J3 13963 921 J1 PRINTER POWER HARNESS 13930 932 13912 925 J4 13963 921 J2 PRINTER DATA HARNESS 13930 931 13912 925 95 13900 945 J1 MOTRO DATA HARNESS 13960 940 1391 2 925 J6 13920 924 J1 FLAT FILM CABLE 13920 939 13912 925 J7 13912 401 J1 KEYPAD HARNESS 13920 939 13912 925 J11 13880 403 N1 CCFL INVERTER 13880 935 13912 925 J12 13900 945 J4 MOTOR POWER HARNESS 13960 939 Page 48 Continued 13910 103 Rev APPENDIX HARNESS CONNECTION LIST DESCRIPTION PART NUMBER INPUT POWER CONNECTIONS P Ns 13910 13911 TRANSFORMER 13910 922 J5 TRANSFORMER HARNESS 115V 13960 942 TRANSFORMER 13910 922 J5 TRANSFORMER HARNESS 230V 13960 943 PWR INPUT RECPT CHASSIS GROUND HARNESS 13920 940 OPTICAL HEAD CHASSIS GROUND STRAP HARNESS 13960 951 INPUT POWER CONNECTIONS P N 13912 13880 402 PWR SPLY 1391 2 925 J10 POWER SUPPLY 13880 402 TO MAIND BOARD 13880 934 POWER INLET 13880 402 PWR SPLY POWER HARNESS 13880 932 PWR INPUT RECPT CHASSIS GROUND HARNESS 13880 933 OPTICAL HEAD CHASSIS GROUND STRAP HARNESS 13960 951 TONOMETER HEAD ASSEMBLY P Ns
23. Cable Harness Fig 3A 44 Defective Motor Board Fig 5 35 Defective Main I O Board Fig 3A 36 7 Y motor failed eee Same as Error Code 6 8 Z motor teen Same as Error Code 6 9 System failed to home motors Same as Disengage Travel Lock in this section 10 Travel lock is Same as Disengage Travel Lock in this section 11 System failed to park Same as Disengage Travel Lock in this section 12 Stray light has been detected Not used in this instrument 13 Positioning motor error Fig 5 35 Disc d Same as Error Code 7 14 Left VVL camera J2 Fig 4 15 Disc d Software incompatibility issue J1 Fig 4 7 Disc d J8 Fig 4 7 Disc d Defective Optical Head Assembly 15 Right VVL camera J2 Fig 4 15 Disc d Software incompatibility issue J2 Fig 4 7 Disc d J8 Fig 4 7 Disc d Defective Optical Head Assembly 16 Undefined iora Not used in this instrument 17 Tonometer Subsystem Error Defective Tonometer Circuit Board replace the Optical Head Assembly Fig 4 7 18 Positioning Subsystem Error 42 Fig 3A 45 Disc d Software incompatibility issue J1 Fig 4
24. D RECEPTACLE OR DAMAGE TO THE UNIT MAY OCCUR CAUTION THIS INSTRUMENT MUST BE PLUGGED INTO AN OUTLET WITH AN EARTH GROUND THAT IS CONNECTED TO THE RECEP TACLE OR DAMAGE TO THE UNIT MAY OCCUR DO NOT DISABLE OR REMOVE THE GROUND PIN CAUTION USE ONLY A 13717 CALIBRATED RUBBER EYE FIXTURE THAT HAS BEEN VERIFIED FOR ACCURACY AT THE REICHERT FACTORY WITHIN THE LAST 6 MONTHS OR INCORRECT CALIBRATION MAY RESULT CAUTION DO NOT USE SOLVENTS OR STRONG CLEANING SOLUTIONS ON ANY PART OF THIS INSTRUMENT OR DAMAGE TO THE UNIT MAY OCCUR CAUTION USE OF ALCOHOL ON THE LIQUID CRYSTAL DISPLAY LCD MAY CAUSE DAMAGE TO THE DISPLAY 13910 103 Rev B Page 5 THEORY OF OPERATION AT555 Introduction 555 is an advanced electronic tonometer that acquires IOP Intraocular Pressure data from the eye and also contains an innovative automated alignment system that quickly aligns itself to the patient during the measurement process Special Features of the AT555 The AT555 has special features that are not available on other tonometers The 555 features are a Sliding Headrest Assem bly for easier patient positioning and an auto alignment system Additional features contained in this instrument are a Travel Lock Assembly and an illuminated nosepiece assembly The special features of the AT555 are described below Sliding headrest Assembly The 555 utilizes a translating headrest assembly which when positioned to the left or right ai
25. D Screen Replacement Warnings amp Cautions CAUTION THE INTERNAL CIRCUITS OF THIS INSTRUMENT HAVE ELECTROSTATIC DISCHARGE SENSITIVE DEVICES ESDS AND ARE SENSITIVE TO STATIC HIGH VOLTAGES STORED IN AND TRANSFERRED BY THE HUMAN BODY OBSERVE CORRECT ESDS PRECAUTIONS OR PREMATURE MALFUNCTION OF THIS INSTRUMENT WILL OCCUR CAUTION ANY REPAIR OR SERVICE TO THE THIS UNIT MUST BE PERFORMED BY DEALERS WHO ARE TRAINED BY REICHERT INC SO THAT CORRECT MEASURE MENT OF THIS UNIT IS MAINTAINED CAUTION THE POWER CABLE TO THE LCD DISPLAY CON TAINS VERY HIGH VOLTAGE DISCONNECT THE INPUT POWER TO THE INSTRUMENT BEFORE DIS ASSEMBLY OF THE UNIT OR SERIOUS PHYSICAL INJURY MAY OCCUR IF THE HIGH VOLTAGE CON NECTIONS ARE TOUCHED WHILE THE UNIT IS OPERATING CAUTION DO NOT USE SOLVENTS OR STRONG CLEANING SOLUTIONS ON ANY PART OF THIS INSTRUMENT OR DAMAGE MAY OCCUR Page 38 13910 103 Rev B REPAIR 1 REPAIR 2 Nosepiece Cover Replacement Printer Door Latch Replacement The steps below provide the information for changing the Nose This section details the steps necessary to replace a broken piece Cover printer door latch 1 Disengage the connection to the Touch Plate and then Note For this repair it is not necessary to perform the steps in remove the Touch Plate from the unit for Models 13910 and Disassembly or Assembly 13911 only The Touch Plate is not removeable on the 13912 Model 1 Open the Printer Door and pull the Latch Finger
26. E icon step test 8 Use the LEFT and RIGHT arrows to highlight the graph that Note If the instrument does not move and freezes then the is symmetrical and has the highest peak amplitude A Refer Too Close sensor has been activated due to the instal to Figure CT 9 Press the button below the SELECT icon to lation of the glass eye into the airtube If this happens save the graph position to memory reboot the unit with the glass eye installed in the airtube Note If you chose a graph other than the center graph press 5 Press the button below the RIGHT arrow to select the digit the button below the MEASURE icon to repeat the 0 8 that requires modification Press the button below the icon step test until the value is 1 0 steps Press the button below the MEASURE icon 6 Use the LEFT and RIGHT arrows to highlight the graph that is symmetrical and has the highest peak amplitude A Refer 9 When the center graph is symmetrical and has the highest to Figure CT 9 Press the button below the SELECT icon to peak amplitude A press the button below the RETURN icon save the graph position to memory to return to the Services Menu 10 Keep the rubber eyes in position for the next test Note The peak amplitude value A of the center graph must not exceed 850 Note If you chose a graph other than the center graph press the button below the MEASURE icon to repeat the 1 0 step test Page 32 13910 103 Rev B CALIBRATION Continuen
27. HERT FACTORY WITHIN THE LAST 6 MONTHS OR INCORRECT CALIBRATION MAY RESULT Note Before starting this test ensure that the rubber eyes are clean and not damaged Cleaning instructions were included with the calibrated eyes If cleaning instruc tions are not available please contact customer service as indicated in the Introduction section of this instruction sheet and one can be sent to you 2 Install your calibrated set of rubber eyes onto the rubber eye stand and align the middle rubber eye in front of the air puff nozzle approximately 0 5 to 1 0 inches 1 3 to 2 5 cm from the end of the nozzle Refer to Figure CT 8 3 Press the button below the RIGHT arrow to select the digit that requires modification Press the button below the icon until the value is 2 0 steps Press the button below the MEASURE icon 4 AT555 will take nine measurements and then display nine graphs Use the LEFT and RIGHT arrows and highlight the graph that is symmetrical and has the highest peak amplitude A Press the button below the SELECT icon to save the graph position to memory Refer to Figure CT 9 7 Press the button below the RIGHT arrow to select the digit that requires modification Press the button below the icon Figure CT 9 Selection of Applanation Graph Note Ifyou chose a graph other than the center graph press until the value is 0 8 steps Press the button below the the button below the MEASURE icon to repeat the 2 0 MEASUR
28. LCD Note 3 Models 13910 and 13911 only Attach the High Voltage LCD backlight connector to the J3 connector on the bottom circuit board Ensure that the cable is routed through the tie wrap located around the front support and that the connector is locked into position Model 13912 Only Attach the High Voltage LCD backlight connector to the connector on the CCFL Inverter Module 4 Install the front bezel using the four screws that were removed Use one drop of threadlocker e g Loctite 222 on the threads to secure the screws Note Do not install the outside covers at this time 5 Models 13910 and 13911 only Refer to the Testing section of this manual and perform the steps in the LCD Brightness Adjustment paragraph 6 Models 13910 and 13911 only Refer to the Testing section of this manual and perform the steps in the LCD Contrast Adjustment paragraph T Perform the Steps in the Assembly section of this manual 13910 103 Rev B GENERAL ASSEMBLY General assembly of the unit requires assembling the outside cov ers and top of unit Perform the following steps in the order given 1 Ensure that the harness to the Left Right Headrest Assembly Side Screws also referred to as LRHA is connected to the motor board at 413 Figure AS 1 Lower Side Cover Screws 2 Install one of the side covers and secure it with the bottom side screws Install the other side cover and secure it with the bottom side screws
29. Motor Fig 5 16 or position sensor Fig 5 12 defective or mechanical interference with movement in the RIGHT direction Motor Fig 5 16 or position sensor Fig 5 12 defective or mechanical interference with movement in the UP direction Motor Fig 5 16 or position sensor Fig 5 12 defective or mechanical interference with movement in the operator s direction Motor Fig 5 16 or position sensor Fig 5 12 defective or mechanical interference with movement in the LEFT direction Motor Fig 5 16 or position sensor Fig 5 12 defective or mechanical interference with movement in the DOWN direction Motor Fig 5 16 or position sensor Fig 5 12 defective or mechanical interference with movement in the patient s direction Output of Pressure Transducer room temperature is too high Replace the 13912 Software with rev 2 3 or greater Malfunction of the Watchdog monitor Damaged Main I O board or power supply unit Quick Reference Guide Fig 4 7 13912 851 Optical Head Assy Fig 5 35 13900 945 Motor Board Assy Fig 3A 36 13912 925 Main I O Board Page 13 TROUBLESHOOTING Continue System Errors The information in this section will aid the technician to isolate general system malfunctions Probable causes are listed in sequence of probability first probable cause listed is the most likely cause or the easiest to test The following list contains some known System Errors that can occur This list cannot include all the possible er
30. O STATIC HIGH VOLTAGES STORED IN AND TRANSFERRED BY THE HUMAN BODY OBSERVE CORRECT ESDS PRECAUTIONS OR PREMATURE MALFUNCTION OF THIS INSTRUMENT WILL OCCUR Note Ensure all input power to the unit is disconnected before removal of the LCD 1 Remove the four screws that attach the front bezel with the Reichert logo Remove the bezel 2 Remove the four screws that secure the LCD to its mounting bracket 3 Models 13910 and 13911 only Disconnect the LCD data connector that attaches onto the back side of the LCD at connector CN1 Model 13912 Only Disconnect the LCD data connector that attaches to the connector on the CCFL Inverter Module 4 Disconnect the high voltage LCD backlight connector that attaches to the bottom circuit board at J3 Loctite is a Trade Name of Loctite CORP U S A Page 45 LCD Installation 1 Attach the data cable to the back of the LCD at CN1 Ensure that the cable is secure and oriented straight into CN1 2 Install the new LCD screen using the four screws that were removed Use one drop of threadlocker e g Loctite 222 on the threads to secure the screws If replacing the LCD with P N 13900 403 and the upper right screw has an isolation washer installed between the screw and the circuitboard ensure that the isolation washer is installed in the same location during assem bly of the replacement LCD Refer to the Testing sec tion of this manual for an illustration of the 13900 403
31. Pin 4 Not Used Pin 5 GND Pin 6 DSR Pin 7 RTS Pin 8 CTS Pin 9 Not Used 13910 103 Rev B Page 19 TESTING Motor Control Circuit Board Assy 13900 945 Schematic 13900 946 Refer to Figures TT 7 amp TT 8 All Models Test Points TP1 Test Point 1 2 4 KHz Square Wave 5 0 VDC Motor Clock TP2 Test Point 2 2 4 KHz Square Wave 3 6 VDC p p X Axis Motor Clock TP3 Test Point 3 2 4 KHz Square Wave 3 6 VDC p p Y Axis Motor Clock TP4 Test Point 4 2 4 KHz Square Wave 3 6 VDC p p Z Axis Motor Clock Test Point 5 Positioning System Drive Current Sense Voltage TP6 Test Point 6 R Motor Drive Current Sense Voltage TP7 Test Point 7 X Axis Motor Drive 1 Signal TP8 Test Point 8 X Axis Motor Drive 2 Signal TP9 Test Point 9 Y Axis Motor Drive 1 Signal TP10 7 Test Point 10 Y Axis Motor Drive 2 Signal TP11 7 Test Point 11 Z Axis Motor Drive 1 Signal TP12 7 Test Point 12 Z Axis Motor Drive 2 Signal TP13 Test Point 13 Vcc Ground J4 Connector Power Input Pin 1 5 0 VDC Vcc Supply Voltage Pin 2 5 0 VDC Vcc Supply Voltage Pin 3 18 VDC during use 14 0 to 16 0 VDC Pin 4 18 VDC during use 14 0 to 16 0 VDC Pin 5 Ground Pin 6 Ground 413 Connector Left Right Detector Circuit Pin 1 Right Eye Detect 5 VDC When ON 0 VDC When OFF Pin 2 Left Eye Detect 5 VDC When ON 0 VDC When OFF Pin 3 5 VDC Vcc Pin 4 Vcc Grou
32. Printer Mount Secure the Printer Mount to the Bracket Assembly using the four screws CAUTION DO NOT OVER TIGHTEN THE SCREWS THAT SECURE THE PRINTER COVER TO THE PRINTER MOUNT AS VERY LITTLE TORQUE IS REQUIRED 4 0 6 0 IN LBS 5 Secure the Printer Cover to the Printer Mount using the two Screws 6 Align the paper through the paper slot and close the printer door Page 40 Printer Cover Screws et Printer P E Printer Mount 5 Printer er Figure R3 1 Printer Parts ID m Upper Edge Over Hole Printer Assembly Above Notch Slide Through ED Indent Figure R3 3 Printer Removal Step 2 Slide Through Indent Figure R3 4 Printer Removal Step 3 13910 103 Rev B REPAIR 4 Power I O Circuit Board Replacement For 13910 and 13911 Models Only This section details the steps necessary to remove replace the Power I O Circuit Board CAUTION THE INTERNAL CIRCUITS OF THIS INSTRUMENT HAVE ELECTROSTATIC DISCHARGE SENSITIVE DEVICES ESDS AND ARE SENSITIVE TO STATIC HIGH VOLTAGES STORED IN AND TRANSFERRED BY THE HUMAN BODY OBSERVE CORRECT ESDS PRECAUTIONS OR PREMATURE MALFUNCTION OF THIS INSTRUMENT WILL OCCUR Special Tools and Equipment Dow Corning RTV 732 Multi Purpose Sealant PI O Board Removal Refer to Figure R4 1 for the layout of the circuit board 1 Disconnect the earth ground connection from under the Tonometer Head 2 Disconnect the power c
33. R X MOTOR ASSY HARNESS J10 MOTOR Y J12 MOTOR Z 13900 945 J13 13900 924 J1 13960 938 ASSY 13920 948 ASSY HEADREST ASSY HARNESS P N 13900 13900 939 amp 13900 944 13900 945 J13 13950 924 J1 HEADREST ASSY HARNESS P N 13910 13912 13910 931 13960 925 POWER 1 0 PCB P N 13900 13901 13960 925 J3 13960 966 ASSY LCD DISPLAY ASSY 13960 966 13960 925 J6 13900 945 J4 MOTOR POWER HARNESS 13960 939 13960 925 J7 13920 924 J1 KEYPAD HARNESS 13920 939 13960 925 J8 13960 966 ASSY FLAT FILM CABLE 13920 939 13960 925 J10 13963 921 J1 PRINTER POWER HARNESS 13930 932 13960 925 J11 13900 945 J1 MOTOR DATA HARNESS 13960 940 13960 925 J12 13963 921 J2 PRINTER DATA HARNESS 13930 931 13960 925 J13 13910 922 POWER 1 0 PCB P N 13910 13911 13900 922 J3 TONOMETER POWER HARNESS 13960 946 13910 922 J3 13960 408 ASSY LCD DISPLAY ASSY 13900 947 13910 922 J6 13900 945 J4 MOTOR POWER HARNESS 13960 939 13910 922 J7 13920 924 J1 KEYPAD HARNESS 13920 939 13910 922 J8 13960 408 ASSY FLAT FILM CABLE 13920 939 13910 922 J10 13963 921 J1 PRINTER POWER HARNESS 13930 932 13910 922 J11 13900 945 J1 MOTOR DATA HARNESS 13960 940 13910 922 J12 13963 921 J2 PRINTER DATA HARNESS 13930 931 13910 922 J13 13900 922 J3 13912
34. ROLA MC68306 44 89 cove ADDRESS BUS DATA BUS INTERRUPTS sna ssaudav 68306 I2C BUS 2 BUS 12 CONTROLLE BUS 16 2 R CRYSTAL MOTOR BOARD INTERFACE PRINTER INTERFACE NCT MICRO INTERFACE 12 BUS Level Translator Level Translator MX1 12C LEVEL TRANSLATOR 8M x 32 SDRAM MEMORY HOLDS DISPLAY and PROGRAM 256K x 16 EPROM DATA BUS MEMORY DATA BUS HOLDS BOOT PROGRAM 32 768 2 CRYSTAL ADDRESS BUS MX1 POWER 12 SUPPLIES xps POWER MOTOROLA MX1 SUPPLIES saya npr INPUT UART UART LEVEL 5VDC TRANSLATOR 18VDC 33V 18VDC 157 REGULATOR LCD menu A COLOR LCD DISPLAY GROUND PORT PIN POWER CONNECTOR DISPLAY TO 12C BUS CONTRAST CONTROL DATA READY TO 68306 GPIO 12C BUS Figure TT 4A Power Input Output Block Diagram P N 13912 only Page 24 13910 103 Rev B TESTING LEICA INC 888 ASSEMBLY NUMBER 13900 921 Pins 5 amp 6 CRI e oe PIN B1 2 5 ge 5
35. RUMENT OR DAMAGE MAY OCCUR CAUTION USE OF ALCOHOL ON THE LIQUID CRYSTAL DIS PLAY LCD MAY CAUSE DAMAGE TO THE DIS PLAY Alignment Window Cleaning Procedure Refer to Disassembly and perform all the steps indicated before perform the following procedure CAUTION DO NOT USE ALCOHOL SOLVENTS OR STRONG CLEANING SOLUTIONS ON THE ALIGNMENT WIN DOWS OR DAMAGE TO THE WINDOWS WILL OCCUR 1 Refer to Figure CL 1 and locate the Rear Mask Windows and wipe the outside surfaces with a clean long handle cotton tip swab moistened with a mild detergent solution 1 cc of liquid dish soap to one liter of clean filtered water filtered below 5 microns to remove dirt and contaminants 2 Remove any remaining dust or foreign particles using only clean dry compressed air at less than 90 psig 620 kPa on both sides of the Rear Mask Page 36 Air Tube Cleaning WARNING AFTER CLEANING THE INSIDE OF THE AIRTUBE PRESS THE BUTTON BELOW THE DEMO ICON LOCATED ON THE OPERATOR S SCREEN SO THAT ANY CONTAMINANTS ARE SAFELY DISLODGED FROM INSIDE THE AIRTUBE 1 Install a soft clean pipe cleaner down the airtube to a depth of approximately 1 5 in or 4 mm Move the pipe cleaner and out of the airtube approximately 10 times to loosen any contaminants Remove and discard the pipe cleaner 2 Accessthe Main menu and press the button below the DEMO icon 5 or 6 times to dislodge any contaminants which were loosened by the pipe cl
36. Refer to Figure AS 1 3 Install the upper side cover screws on the operator s side of the unit and secure both side covers Refer to Figure AS 2 4 Tighten the top screws on the patient s end to secure the bracket to the side covers 5 Slide the harness into its retaining clip located on the side cover Refer to Figure AS 3 CAUTION DURING ASSEMBLY ENSURE THAT THE LEFT RIGHT DETECTOR HARNESS IS INSTALLED INTO THE HARNESS CLIP OR THE WIRES MAY BECOME DAMAGED DUE TO IMPROPER PLACEMENT 6 Placethe connector atthe end ofthe harness through the top left hole in the front of the Top Cover Refer to Figure AS 5 7 Install the Top Cover onto the instrument so that the lower front edge of the Top Coveris even with the lower edge of the opening on the patient s end of the side covers Refer to Figure AS 4 8 Inserta Phillips 2 screwdriver into the access holes and turn the screws clockwise until they are secure at 10 0 Ibf in 1 1 Nem Refer to Figure AS 5 9 Attach the harness to the circuit board on the back side of the LRHA 10 Place the LRHA into its mounting holes in the front of the Top Cover and secure the screws clockwise to 10 0 1 1 Nem Refer to Figure AS 6 11 Take a measurement of a patient to ensure that the unit is correctly working If the unit does not take a measurement go to the Troubleshooting section of this manual and determine the cause of the malfunction Lower edge of top cover even with
37. Replace blown fuse s Fig 3A 27 or Fig 3 30 Replace Transformer Fig 3 32 for 13910 and 13911 only Replace PSU Fig 3A 37 for 13912 only Attach connector Attach connector Replace LCD Screen Fig 2 5 Replace Inverter Board Fig 3A 7 for 13912 only Reattach connector Fig 2 7 Disengage Travel Lock Attach connector Align sensor flags to sensors Replace defective Sensor Assembly Fig 5 12 Replace damaged motor Fig 5 16 Have the patient open their eye wide Defective Too Close sensor board Fig 9 22 13910 and 13911 only Defective Too Close wire Fig 9 7 Clean touch sensor end of the air tube with an alcohol pad Replace Proximity Board Fig 9 22 for 13910 and 13911 only Check connection to Tonometer Board Fig 8 38 for 13912 only Check connection of Airtube Fig 9 7 for 13912 Replace defective Tonometer Board Fig 8 38 for 13912 only 13910 103 Rev B TROUBLESHOOTING Miscellaneous System Errors Table Continued Definition Does Find the Does Find the Eye Cont d Finds one eye not the other Tries three times to find the eye Will Not Take a Reading Asterisk No Applanation Readings Printer Not Printing s Discd Disconne
38. TION USE ONLY A 13717 CALIBRATED RUBBER EYE FIX TURE THAT HAS BEEN VERIFIED FOR ACCURACY AT THE REICHERT FACTORY WITHIN THE LAST 6 MONTHS OR INCORRECT CALIBRATION MAY RESULT Note Before starting this test ensure that the rubber eyes are clean and not damaged Cleaning instructions were included with the calibrated eyes If cleaning instruc tions are not available please contact customer service as indicated in the Introduction section of this instruction sheet and one can be sent to you Perform the following 1 While in the Services Menu screen press the button below the DOWN icon to highlight the Cal Ver test then press the button below the SELECT icon The Calibration Type Menu will be active 2 Press the button below the DOWN icon to highlight the Eye test then press the button below the SELECT icon The Tonometer Calibration screen will be active 3 Install the set of rubber eyes onto the rubber eye stand and move the low rubber eye in front of the air puff nozzle on the 555 approximately 0 5 to 1 0 inches 1 3 to 2 5 cm from the end of the nozzle Refer to Figure CT 11 4 Using the DOWN arrow highlight the LOW menu choice Then press the button below the SELECT button to activate the menu choice Note If your data sheet does not have a section for the 555 your rubber eyes are out of date and will require recalibration DO NOT use the values for the NCTII Xpert or the Xpert Plus 5 Refe
39. Y3 32 8 KHz approx 1 7 Vp p Sinusoid J1 Connector Pin B1 Vcc Ground 0 VDC Pin B32 5 0 VDC Vcc P1 Connector Header Jumpers Pin 5 6 Watch Dog Disable used for testing Should not short pins 5 6 during normal operation Jumper in Disable Jumper out Enable Misc Test Points CR1 Red Green Green normal operation Red hardware failure or reset Page 18 13910 103 Rev B TESTING Main I O Circuit Board Assy 13912 925 Schematic 13880 911 Refer to Figures TT 3A amp TT 4A Model 13912 only Test Points Y1 32 8 kHz approx 1 7 Vp p Sinusoid Y2 3 69 MHz approx 5 5 Vp p Sinusoid Y3 16 0 MHz approx 5 5 Vp p Sinusoid Y4 32 8 KHz approx 1 7 Vp p Sinusoid Y5 16 0 MHz approx 5 5 Vp p Sinusoid Connector Tonometer Power Pins 1 2 5 VDC Pin 3 18 VDC Pin 4 18 VDC Pins 5 6 GND J3 Connector Printer Power Pins 1 2 5 0 VDC Pin 3 Not Used Pins 4 5 6 Ground J10 Input Power Connector Pin 1 18 VDC Pin 2 5 VDC Pin 3 5 VDC Pin 4 GND Pin 5 GND Pin 6 18 VDC Pin 7 8 Not Used J11 LCD CCFL Inverter Connector Pin 1 5 VDC Pin 2 5 VDC Pin 3 GND Pin 4 GND Pin 5 Enable On 5 VDC Pin 6 Brightness Dim VDC Bright 2 VDC 412 Connector Motor Power Pins 1 2 5 VDC Pins 3 4 18 VDC Pins 5 6 GND 413 RS232C Connector Serial Port Pin 1 CD OUT Pin 2 TXD Pin 3 RXD
40. applanate When the cor nea has applanated the tonometer records the pressure and dis plays the IOP on the LCD screen The air puff system consists of a piston within a stainless steel cylinder an electronic drive for the piston assembly and an airtube assembly referred to as the nosepiece assembly The piston and electronic drive provide the force to push the air out of the air tube The nosepiece assembly combines the air puff pressure monitoring applanation detection and the proximity detection functions together which enable a Closed loop delivery system When the patient is positioned correctly in front of the air tube and the measure button is activated the AT555 automatically aligns to the center of the cornea and the piston is energized After the air is delivered to the cornea and the cornea has applanated light from the emitter diode is sensed by the detector When the detec tor has reached its highest output signal applanation of the eye the solenoid drive to the piston immediately stops and air pressure quickly ramps down When the retaining spring attached to the piston overcomes the ramp down pressure the retaining spring returns the piston to its original position The manifold attached to the back of the airtube monitors the pres sure when applanation occurs and the pressure is recorded This pressure is proportional to the force required to applanate the cor nea From this pressure the intraocular pressure IOP is
41. ards to body capacitance If the patient s eye is too close to the end of the air tube the circuit will detect a large change in the body capacitance and the proximity detector will dis able the motor drive circuitry in the forward direction After the motors are disabled in the forward direction the positioning system resets to the home position After the position system returns to the home position the instrument will try to position in front of the eye and take a another reading The instrument will try a maximum of three times to take a reading and if all three times the too close sensor is activated the instru ment will return to the menu choice that requires the measure but ton depressed to initiate another measurement Target Illuminator The target illuminator is a visible target that the patient utilizes to align their eye to the instrument This target is located on the nosepiece assembly at the rear side of the air tube During align ment of the patient to the instrument the patient initially finds the green target then moves forward to place their head against the headrest Once against the headrest the instrument quickly finds the eye and takes a measurement Touch Sensor This instrument contains a touch sensor that will stop all motion of the alignment system when activated If someone 9 patient touches the inside edge of the touch plate grey plate which sur rounds the nosepiece cover the message Touch Sens
42. ber is the same as that which is on the Calibration Sheet press the button below the MEASURE icon The instrument will take 5 measurements 11 After all measurements are taken press the button below the CALCULATE icon Refer to Figure CT 12 12 After the instrument has completed the calculations press the button below the RETURN icon twice to return to the Services Menu Page 34 IBRATION 41 5 41 6 41 4 41 5 CALIBRATION IS NOT UPDATED Figure CT 12 Rubber Eye Calibration Screen 13910 103 Rev B CALIBRATION Final Checks This paragraph provides the final checks and steps to ensure that the unit is fully functional after a calibration has been performed using the Service Card 1 Ensure all input power to the AT555 is disconnected and then perform the steps in the Assembly section of this manual CAUTION USE ONLY 13717 CALIBRATED RUBBER EYE FIX TURE THAT HAS BEEN VERIFIED FOR ACCURACY AT THE REICHERT FACTORY WITHIN THE LAST 6 MONTHS OR INCORRECT CALIBRATION MAY RESULT 2 Align the low value calibrated rubber eye in front of the air puff nozzle approximately 0 5 to 1 0 inches 1 3 to 2 5 cm from the end of the nozzle Refer to Figure CT 7 3 Apply the correct input power to the unit and then press any button when displayed 4 Slide the Left Right Headrest Assembly fully to the left or right Press the MEASURE button and take three readings for the low eye 5
43. ch Sensor Activated and Too Close Activated screens for better instruction Revision 1 21 to 1 22 4 03 Update Help screens Revision 1 22 to 1 23 7 03 Added Reichert Registered Trademark to initial screen Correction of spelling errors Model 13912 Revision 2 23 9 04 Initial release Revision 2 23 to 2 30 4 03 Change printer data to match LCD data Page 50 13910 103 Rev B APPENDIX D RUBBER EYE CLEANING PROCEDURE Rubber Eye Cleaning Procedure Caution Cleanliness and integrity of the rubber eye surface is required to maintain proper function and longevity of the rubber eye Caution Do not abuse the surface of the rubber eye through rough handling or use abra sive materials to clean it Once the rubber eye is mounted in the fixture avoid touching or moving the eye Procedure 1 Wash your hands to remove all dirt and oils 2 When cleaning T bar mounted rubber eyes mark the location of the white dot on the rubber eye on the T bar before removing the rubber eye 3 Remove the rubber eye from its rubber eye mount attached to the T bar or its storage container by grasping the outer edge and gen tly pulling up 4 With your finger wash the eye with a lanolin free mild liquid soap and distilled water fap water may be used however there is an increased risk of damage to the eye when using tap water 5 Rinse clean the rubber eye with water 6 Use clean dry air to remove the water fro
44. ckets remove them from the damaged MCB and install them onto the new MCB Place the damaged MCB into the antistatic bag Motor Board Installation 1 Secure the new MCB onto the XYZ support bracket using the four screws that were removed 2 Ensure that potentiometer R15 is set fully clockwise 10 00 4 00 position on the MCB 3 Attach a plastic tie wrap to secure the sensor wires of the XYZ Assembly to the J4 connector on the MCB 4 Perform the steps in the Assembly section of this manual Page 44 REPAIR 7 LCD Screen Replacement Introduction This instruction sheet provides instructions regarding installation of a replacement LCD Screen 13960 966 or 13900 403 Note Refer to Figure TT 3 or TT3A for an illustration of the test points on the Power I O Board Refer to Figures TT 1 and TT 2 for illustrations of the LCD screens Special Tools amp Equipment Digital Voltmeter 50 to 50 VDC LCD Removal Disconnect all input power from the unit Remove the top and side covers of the unit as indicated in the Service Manual CAUTION THE POWER CABLE TO THE LCD DISPLAY CON TAINS VERY HIGH VOLTAGE DISCONNECT THE INPUT POWER TO THE INSTRUMENT BEFORE DIS ASSEMBLY OF THE UNIT OR SERIOUS PHYSICAL INJURY MAY OCCUR IF THE HIGH VOLTAGE CON NECTIONS ARE TOUCHED WHILE THE UNIT IS OPERATING CAUTION THE INTERNAL CIRCUITS OF THIS INSTRUMENT HAVE ELECTROSTATIC DISCHARGE SENSITIVE DEVICES ESDS AND ARE SENSITIVE T
45. contact your local authorized Reichert dealer Reichert Inc Ophthalmic Instruments 3374 Walden Ave Depew New York USA 14043 Telephone 716 686 4500 Fax 716 686 4545 www reichert com e mail info reichert com 150 9001 Certified Rerchert Ophthalmic Instruments 13910 103 Rev 8 05
46. cted or intermittent connections Check crimp joints and continuity from pin to pin Probable Cause Moves straight out goes out then straight back can not find anything External light confusing positioning system Infrared Light interference on measuring side Proximity detector is activated Proximity Detector Dirty Position Windows Patient not holding still Patient s eye too far from Patient Window Patient not focusing on target eye moving around Patient has dry eye Dirty Position Windows Unit needs re boot of hardware Unit out of alignment J7 J8 Fig 4 7 Disc d or reversed Unit much out of alignment Piston not working Printer out of paper Cables not connected Printer not printing characters Solution Ensure light path from VVL diodes Fig 8 23 to the VVL cameras Fig 8 52 are unobstructed Check connection to VVL diodes cameras Replace defective diode and or camera Isolate sources of external light incandescent and or infrared and remove light source Isolate sources of external light incandescent and or infrared and remove light source Eliminate touching end of nosepiece Replace detector circuit Clean the optics and airtube as indicated in the Cleaning section of this manual Encourage patient to remain still Have patient move toward nosepiece Have patient look only at target Have patient blink eyes Clean the optics and airtube as indicated in the C
47. ds with the correct posi tioning of the patient and automatically displays left or right on the LCD Auto Alignment System Our patented hands free auto alignment technology in this instrument removes the necessity to adjust any joystick or chin rest After the patient is positioned correctly the opera tor initiates the measurement process by pressing the Mea sure button The AT555 then automatically aligns itself in front of the eye and acquires the data Left Right Detector Each instrument contains a Left Right detector that auto matically detects which eye the instrument is measuring When the headrest is positioned to the left or right the LCD displays the appropriate left or right eye Travel Lock Assembly A travel lock assembly is provided with the instrument to secure the positioning system during transportation This assembly ensures that during transportation the operational integrity of the instrument is maintained Illuminated Nosepiece Assembly An illuminated nosepiece was designed into this instrument to assist with patient alignment When this assembly is utilized the patient quickly aligns themself to the instrument Page 6 Positioning System Operation The new AT555 optimizes the alignment of the patient to the opti cal system without the use of a joystick or the necessity of a chin rest The patient locates the red illuminated nosepiece observes the green fixation target inside the illuminated
48. e Motor Board to the PIOB Attach data harness J5 and the power connector J1 from the optical head to the PIOB Attach the earth ground harness from the Base Casting to the terminal lug on the bottom of the Tonometer Head near the LCD Secure the wires to the tie wrap mount on the side of the XYZ support bracket using a plastic tie wrap Perform the steps in the Assembly section of this manual Y Y3 3189 VCC vcc or az K H 1 18V 1 J12 REIC ERT INC J10 13910 103 Rev B Figure R4 2 Connector Locations Model 13912 Only REPAIR 5 Control Circuit Board Replacement For 13910 and 13911 Models Only No Control Board in Model 13912 This section details the steps necessary to remove replace the Control Circuit Board Note Refer to Figure TT 5 for an illustration of the Control Cir cuit Board CAUTION THE INTERNAL CIRCUITS OF THIS INSTRUMENT HAVE ELECTROSTATIC DISCHARGE SENSITIVE DEVICES ESDS AND ARE SENSITIVE
49. eaner External Cleaning Procedure Clean the external surfaces of this instrument using a clean soft cloth moistened with a mild detergent solution 1 cc of liquid dish soap to one liter of clean filtered water filtered below 5 microns DO NOT USE ALCOHOL 13910 103 Rev B GENERAL DISASSEMBLY General disassembly of the unit requires removing the outside covers and the top of the tonometer head assembly Perform the following steps in the order given 1 Slide the Left Right Headrest Assembly to one side and remove the screw Slide the headrest fully to the other side and remove the other screw that secures the headrest assembly Refer to Figure DS 1 CAUTION DO NOT PULL THE HEADREST ASSEMBLY AWAY FROM THE UNIT WITHOUT DISCONNECTING THE LEFT RIGHT DETECTOR HARNESS OR DAMAGE TO THE UNIT MAY OCCUR CAUSING THE LEFT RIGHT DETECTOR TO STOP OPERATING 2 Disconnect the Left Right Harness from the Headrest Assembly Refer to Figure DS 2 3 Inserta Phillips 2 screwdriver into the access holes and turn the screws counterclockwise approximately 6 full turns The screws only loosen and are retained inside the unit 4 Remove the Top Cover and carefully push the Left Right Detector Harness through the access hole Refer to Figure DS 3 5 Remove the two screws at the bottom of each side cover Refer to Figure DS 4 CAUTION DO NOT PULL THE SIDE COVER AWAY FROM THE UNIT WITHOUT DISCONNECTING THE LEFT RIGHT DETECTOR HARNESS FROM
50. entiometer Fixation Alignment This procedure provides instruction regarding the alignment of the fixation spot that the patient observes during measurement View the green fixation spot through the air tube Refer to Figure CT 3 for an illustration of the fixation spot This green spot should appear centered and near the back of the tube If the green spot is not round or has a reflection around the perimeter of the spot the position of the circuit board must be adjusted To adjust the position of the circuit board perform the following 1 If the Tonometer Head Cover was not removed you must remove the cover to perform the steps below 2 Loosenthe 2 screws that secure the fixation PCB assembly to the nosepiece assembly 3 Look through the airtube assembly and tighten the circuit board when the green spot is round centered and does not Figure CT 3 Fixation Spot have a reflection Refer to Figure CT 4 Air Puff Aperture NOTE If the green fixation spot cannot be adjusted so that the spot is round and has no reflections remove the circuit Fixation board from the tube housing and slightly adjust the posi Spot tion of the diode towards the direction of the shadow PAIN Figure CT 4 Fixation Spot Shadow Page 30 13910 103 Rev B CALIBRATION Optical Alignment This procedure details the steps for performing manual alignment of the optical system When the square dots representing the VVL ca
51. er I O Circuit Board Replacement 13910 amp 13911 Only sse 41 Repair 4A Power I O Circuit Board Replacement 13912 Only sse 42 Repair5 Control Circuit Board Replacement 13910 amp 13911 Only 44 Repair6 Motor Circuit Board Replacement sss teen tenerent 44 Repair 7 LCD Screen Replacement 45 General Assembly UP OR RR de lanai 46 Appendix General Specifications OB e ree o e e cup fob eden 4T Appendix B Harness Connection List sse tentent neret tenente tena 48 Appendix C Software Revision List ntt eee a sei tr side dH a Re E 50 Appendix D Rubber Eye Cleaning Procedure 51 Page 2 13910 103 Rev B LIST OF FIGURES Figure Description Page OP 1 Alignment System 7 2 Measurement doo ortae e nne ad 9 1 PCD P N 13960 966 tierce o 17 TT 2 20591 213900 403 eto bande nuin oett 17 TT 3 Power Input Output Circuit Board Layout Model 13910 amp 13911 Only 21 TT 3A Power Input Output Circuit Board Layout Model 13912 Only
52. garding the test points that are located on the circuit boards of this instrument are given as a guide to verify the correct operation of the unit If special operating conditions are required to observe the references given effort will be given to provide the necessary information with the appropriate references Power Input Output Circuit Board Assy 13910 922 Schematic 13910 912 Refer to Figures TT 3 amp TT 4 Models 13910 amp 13911 only Test Points TP1 Test Point 1 6 Volts peak half wave at 50 KHz TP2 Test Point 2 20 5 VDC note LCD screen must be ON Refer to the Calibration section for voltage level adjustment TP9 Test Point 9 750 mVDC note LCD screen must be ON Refer to the Calibration section for voltage level adjustment TP10 Test Point 10 Signal Ground 0 VDC TP11 Test Point 11 Vcc Ground 0 VDC Note Pin 5 of the RS232 serial port is also Vcc Ground 0 VDC J4 Connector Header Pin 1 Vcc Ground 0 VDC Pin 7 8 0 VDC Pin 8 8 8 VDC Pin 9 8 8 VDC Misc Test Points C60 15 VDC CR10 18 VDC CR11 18 VDC CR12 5 0 VDC Y1 pin closest to C9 8 0 MHZ Sinusoid Voltage at F1 main fuse on ckt bd 14 to 16 VDC Main Control Circuit Board Assy 13900 921 Schematic 13900 911 Refer to Figures TT 5 amp TT 6 Models 13910 amp 13911 only Oscillator Outputs 1 16 0 MHz approx 5 5 Vp p Sinusoid Y2 3 69 MHz approx 5 5 Vp p Sinusoid
53. he four screws that secure the PIOB to the Base Casting Continued 13910 103 Rev REPAIR 4A PI O Board Installation CAUTION THE INTERNAL CIRCUITS OF THIS INSTRUMENT HAVE ELECTROSTATIC DISCHARGE SENSITIVE DEVICES ESDS AND ARE SENSITIVE TO STATIC HIGH VOLTAGES STORED IN AND TRANSFERRED BY THE HUMAN BODY OBSERVE CORRECT ESDS PRECAUTIONS OR PREMATURE MALFUNCTION OF THIS INSTRUMENT WILL OCCUR Remove the new Power I O Board PIOB from its antistatic bag using ESD precautions and then set the PIOB in place onto the Base Casting and secure the PIOB with the four screws and washers Install the two standoffs and that secure the Computer Interface connector to the Base Casting Install the data harnesses J6 amp J7 from the Keypad Assembly and LCD to the PIOB Ensure thatthe locking bars ofthe connectors are engaged Apply a thin bead of RTV 732 12 or equivalent across the top of each of the connectors to aid in securing the cables to the connector YA N Attach the power connector J10 from the Power Supply to the PIOB Attach the data connector J4 and the power connector J3 from the Printer Assembly to the PIOB Attach the LCD power connector J11 to the PIOB Place the XYZ Positioning Assembly over the Base Casting and install the four screws washers and nuts that secure it to the Base Casting Attach the data harness J5 and the power connector J12 from th
54. ig 4 12 Defective Control Board Fig 4 12 Defective Optical Head Assy Fig 4 7 Fig 5 35 Disc d J8 J10 or J12 Fig 5 35 Disc d X Y Z Motor Connectors Interchanged U5 U6 U7 Fig 5 35 FPGA Chip Not Seated Properly Defective Motor Data Cable Harness Fig 4 21 Defective Motor Board Fig 5 35 Defective Power I O Board Fig 4 27 Same as Error Code 6 Same as Error Code 6 Same as Disengage Travel Lock in this section Same as Disengage Travel Lock in this section Same as Disengage Travel Lock in this section Not used in this instrument Fig 5 35 Disc d Same as Error Code 7 J2 Fig 4 15 Disc d Software incompatibility issue J1 Fig 4 7 Disc d J8 Fig 4 7 Disc d Defective Optical Head Assembly Continued on next page Page 10 13910 103 Rev B TROUBLESHOOTING Error Code Table Models 13910 and 13911 only Continued Code Definition Probable Cause 15 Right VVL camera J2 Fig 4 15 Disc d Software incompatibility issue J2 Fig 4 7 Disc d J8 Fig 4 7 Disc d Defective Optical Head Assembly 16 Undefined cene Not used in this instrument 17 Tonometer Subsystem Defective Tonometer Circuit Board replace the Optical Head Assembly Fig 4 7 18 Positioning Subsystem Error 42 Fig 4 15 Disc d Software incompatibi
55. lace a defective printer Itis not necessary to perform the steps in the Disassembly section of this manual to perform this repair sequence CAUTION THE INTERNAL CIRCUITS OF THIS INSTRUMENT HAVE ELECTROSTATIC DISCHARGE SENSITIVE DEVICES ESDS AND ARE SENSITIVE TO STATIC HIGH VOLTAGES STORED IN AND TRANSFERRED BY THE HUMAN BODY OBSERVE CORRECT ESDS PRECAUTIONS OR PREMATURE MALFUNCTION OF THIS INSTRUMENT WILL OCCUR 1 Open the Printer Door and remove the Printer Cover Screws that secure the Printer Cover to the Printer Assembly 2 Remove the four screws that secure the Printer Assembly to the Printer Mount 3 Remove the four screws that secure the Printer Mount to the Bracket Assembly 4 Detach the two harnesses from the Printer Assembly 5 Remove the Printer Assembly from the Printer Mount Note It is difficult to remove the Printer Assembly from the Printer Mount Refer to Figures R3 2 through R3 4 for illustrations of the Printer Assembly removal Printer Installation 1 Install the new printer into the Printer Mount in the reverse order that it was removed 2 Attach the two printer harnesses to the printer CAUTION DO NOT OVER TIGHTEN THE SCREWS TO THE PRINTER MOUNT AS VERY LITTLE TORQUE IS REQUIRED 4 0 6 0 IN LBS 3 Secure the Printer Assembly to the Printer Mount using the four screws 4 Setthe Printer Mount against the Bracket Assembly and align the PC Card Slot into the groove at the rear of the
56. leaning section of this manual Unplug unit wait 10 seconds then apply input power then retest Perform the Calibration procedure as indicated in this manual Attach connector Perform the Calibration procedure as indicated in this manual Check connection at J13 Fig 4 7 Replace defective piston solenoid Replace paper with P N 12441 Re attach J10 and or J12 Fig 4 27 Replace print head Fig 11 1 Quick Reference Guide Fig 4 7 13910 851 Optical Head Assy or 13912 851 Optical Head Assy Fig 5 35 13900 945 Motor Board Assy Fig 4 27 13910 922 Power I O Board Fig 4 12 13900 921 Control Board Assy Fig 3A 36 13912 925 I O Main PCB 13910 103 Rev B Page 15 TESTING Introduction The following section provides the testing procedures and a troubleshooting guide that gives helpful sugges tions when incorrect operation of the AT555 occurs A list of general specifications 0 size weight volt age requirements etc for this instrument is given in Appendix A A list of software revisions for this instrument is included in Appendix C CAUTION CAUTION Note Note Page 16 ANY REPAIR OR SERVICE TO THE AT555 MUST BE PERFORMED BY EXPE RIENCED PERSONNEL OR DEALERS THAT ARE TRAINED BY REICHERT INC SO THAT CORRECT MEASUREMENT OF THE AT555 IS MAINTAINED THE INTERNAL CIRCUITS OF THIS INSTRUMENT HAVE ELECTROSTATIC DISCHARGE SENSITIVE DEVICES ESDS AND ARE SENSITIVE TO STATIC
57. lity issue Fig 4 7 Disc d J2 Fig 4 7 Disc d J8 Fig 4 7 Disc d Defective Optical Head Assembly 19 Undefined cete e tete Not used in this instrument 20 uere te eere nete Defective Tonometer Circuit Board replace the Optical Head Assembly Fig 4 7 21 KORTA J2 Fig 4 15 Disc d J7 Fig 4 7 Disc d 48 Fig 4 7 Disc d 22 X MOTOR Homing STARTUP ERROR Motor board Fig 5 35 or Main power I O board Fig 4 27 defective 23 Y MOTOR Homing STARTUP ERROR Motor board Fig 5 35 or Main power I O board Fig 4 27 defective 24 Z MOTOR Homing STARTUP ERROR Motor board Fig 5 35 or Main power I O board Fig 4 27 defective 25 X MOTOR Homing IN ERROR Motor Fig 5 16 or position sensor Fig 5 12 defective or mechanical interference with movement in the RIGHT direction 26 Y MOTOR Homing IN ERROR Motor Fig 5 16 or position sensor Fig 5 12 defective or mechanical interference with movement in the UP direction 27 Z MOTOR Homing IN ERROR Motor Fig 5 16 or position sensor Fig 5 12 defective or mechanical interference with movement in the operator s direction 28 X MOTOR Homing OUT ERROR Motor Fig 5 16 or position sensor Fig 5 12 defective or mechanical interference with movement in the LEFT direction 29 Y MOTOR Homing OUT ERROR
58. ls 13910 amp 13911 Only Dow Corning is a registered trademark of Dow Corning 13910 103 Rev B Page 41 REPAIR 4 Conrinuep Board Installation CAUTION THE INTERNAL CIRCUITS OF THIS INSTRUMENT HAVE ELECTROSTATIC DISCHARGE SENSITIVE DEVICES ESDS AND ARE SENSITIVE TO STATIC HIGH VOLTAGES STORED IN AND TRANSFERRED BY THE HUMAN BODY OBSERVE CORRECT ESDS PRECAUTIONS OR PREMATURE MALFUNCTION OF THIS INSTRUMENT WILL OCCUR 1 Remove the new Power I O Board PIOB from its antistatic bag using ESD precautions and then set the PIOB in place onto the Base Casting and align the PIOB over the three plastic standoffs Secure the PIOB onto the plastic standoffs Place the damaged PIOB into the antistatic bag 2 Secure the PIOB with the three screws and washers 3 Install the two standoffs and that secure the computer interface connector to the Base Casting 4 Install the data harnesses J7 amp J8 from the Keypad Assembly and LCD to the PIOB Ensure that the locking bars of the connectors are engaged Apply a thin bead of RTV 732 or equivalent across the top of each of the connectors to aid in securing the cables to the connector 5 Attach the power connector J5 from the Transformer to the PIOB 6 Attach the data connector J12 and the power connector J10 from the Printer Assembly to the PIOB T Attach the LCD power connector J3 to the PIOB 8 Place the XYZ Positioning Assembly over the Base Casting
59. m the rubber eye Note Do not use a tissue or a cloth to dry the rubber eye 7 Replace the rubber eye onto the rubber eye mount located on the T bar a Hold the outer edges of the rubber eye and align the white dots b Carefully push the rubber eye onto the rubber eye mount using a rocking motion until it is fully seated and not tilted in any direction c Visually inspect the rubber eye so that the white dots align and the rubber eye is seated flat against the rubber eye mount 8 Maintain calibration every six months to ensure that the value of the rubber eye has not changed and the calibration date has not expired 13910 103 Rev B Page 51 ORDERING INFORMATION ACCESSORIES CatalogDescription 12418 Instrument stand adapter mount 12430 273 Cleaning Cloth 12441 Printer paper 13910 101 User s Guide 13916 External power supply universal input 16 VDC out 0 0 to 3 12 amps Note This power supply is medically approved to UL2601 1 IEC60601 1 and CSA 22 2 601 1 standards 13920 084 Dust Cover To order any of these accessories contact your local authorized Reichert dealer OTHER REICHERT PRODUCTS To complement your AT555 Auto Tonometer we invite you to take a look at the other products made by our company AL200 Auto Lensometer Keratometer LongLife Project O Chart Phoroptor Refracting Instrument XCEL Slit Lamps AP250 Auto Projector PT100 Handheld Tonometer To order any of these products
60. meras are within the borders of the target squares the alignment of the system is acceptable 1 While the Services Menu screen press the button below the DOWN icon to highlight the VVL Align test then press the button below the SELECT icon The VVL alignment test screen will be active 2 Install the Glass Eye tool into the end of the air puff nozzle so that the brass support attached to the shaft of the tool is in the vertical position Refer to Figure CT 5 3 The square dots must be within the target squares or improper alignment of the system will occur resulting in incorrect readings and or asterisk readings Note If the square dots are within the target squares proceed to the next test in this section 4 If the square dots are not within the target squares adjust the position of the VVL cameras until the dots are best centered and within the target squares as follows refer to Figure CT 6 a Remove the four screws that secure the cover to the tonometer head and remove the cover b Disconnect the wire harness to the Touch Sensor Plate and remove the plate from the unit Note Do not to loose the plastic isolation bushings or the touch sensor message will appear all the time and the unit will proceed to the measure screen c Remove the screws that attach the Rear Mask assembly to the unit d Loosen the two screws on the front of the casting which are on either side of the mirror for the VVL Camera that
61. nd Page 20 13910 103 Rev B TESTING CRI1 4 CRIOC 60 CRI2 2 FI 44 Figure TT 3 Power Input Output Circuit Board Layout Models 13910 amp 13911 only 13910 103 Rev Page 21 TESTING Y2 YA Yl 902 YS J5 J3 0 20 5 5 z 2 2 2 2 7 2 2 gt gt 770020 opoo229 0O01 l E eU D a TM BN m f mi J10 J12 J13 Figure TT 3A Power Input Output Circuit Board Layout Model 13912 only 13910 103 Rev B Page 22 TESTING Conrinuep 9 OWAZL UOLDO3NNOO er adim fe ocoviva 017 rc FROM CONTROL BOARD YOLOW ol 04 Figure TT 4 Power Input Output Block Diagram Models 13910 amp 13911 only Page 23 13910 103 Rev B TESTING 256K x 16 SDRAM MEMORY HOLDS PROGRAM and DATA BATTERY DATA BUS DATA BUS DATA BUS BUFFERS 256K x 16 EPROM MEMORY DATA BUS DATA BUS DATA BUS ADDRESS BUS HOLDS BOOT PROGRAM ADDRESS BUS KEYPAD DATA BUS PORT pH DECOD MOTO
62. ng testing The following tools and fixtures are required for performance of the calibration procedures contained in this document CAUTION USE ONLY A 13717 CALIBRATED RUBBER EYE FIX Service Software Card 13900 954 For Models 13910 and 13911 only This software provides the operating protocol when perform ing the calibration tests Glass Eye P N 12430 800B also part of 13702 kit The glass eye is used to set the alignment of the VVL cam eras for positioning of the measurement system Rubber eye stand P N 13718 This stand is a support for the t bar and positions the t bar to the correct height and angle Rubber Eyes T bar P N 13717 TURE THAT HAS BEEN VERIFIED FOR ACCURACY AT THE REICHERT FACTORY WITHIN THE LAST 6 MONTHS OR INCORRECT CALIBRATION MAY RESULT Note Ensure that the rubber eyes are clean and not damaged Cleaning instructions were included with the calibrated eyes If cleaning instructions are not available refer to Appendix D in this manual for the rubber eye cleaning procedure 13910 103 Rev B Procedure The AT555 measures intraocular pressure IOP If calibration of this instrument is required it is recommended that only personnel who were trained by Reichert Inc perform this calibration proce dure Please follow this procedure in the order given unless otherwise indicated for calibration of the AT555 CAUTION THIS INSTRUMENT HAS ELECTROSTATIC DIS CHARGE SENSITIVE DEVICES
63. nosepiece and then slowly leans against the headrest while observing the green target After the patient is positioned correctly the operator ini tiates the measurement process by pressing the Measure button The measurement process then automatically aligns and acquires the eye data quickly and accurately During the entire measurement process the alignment system verifies the correct position of the patient to ensure that correct positioning is main tained for accurate measurement data Refer to Figure OP 1 for a block diagram of the Alignment System Details of the Alignment System The auto alignment system of the auto tonometer uses two positioning LEDs wavelength 875 nm and two receiving cameras as the main components of the alignment system When a measurement is requested by an input from the operator button push the Motor Control Board applies power to the right Position LED The LED emits light toward the eye Some of the emitted light reaches the eye and is reflected off the cornea and is sent to the 1st Surface Mirror on the opposite side This light is then reflected off of the mirror and continues on through the IR Filter Position Lens Spacer Lens and finally to the Position LED Camera The Position LED Camera receives the light source data and converts it to electronic data This converted data is sent to the Video Circuit Board Control Board I O Board and Motor Board where it is processed using a proprietary proces
64. onnector J13 at the Power I O Circuit Board also referred to as PIOB that connects to the Tonometer Head 3 Disconnect the data harnesses J11 and the power harness J6 on the PIOB that connects to the Motor Board CAUTION DO NOT TO CUT INTO THE WIRES THAT SECURE THE WIRES TO THE XYZ POSITIONING SYSTEM 2 Yl FI C60 Cut the plastic wire tie that secures the transformer and ground wires to the XYZ Positioning Assembly Remove the four screws washers and nuts that secure the XYZ Positioning Assembly to the Mounting Base Separate the XYZ Positioning Assembly and Tonometer Head assembly from the Base Casting Set the XYZ Positioning Assembly on its side next to the Base Casting Disconnect the power connector J3 and the data harness J8 at the PIOB that connects to the LCD screen Disconnect the power connector J10 and the data harness J12 at the PIOB that connects to the Printer Assembly Disconnect the power connector J5 at the PIOB that connects to the Transformer Disconnect the data harness J7 at the PIOB that connects to the Keypad Assembly Remove the two standoffs and lock washers that secure the 9 pin computer interface connector to the Power Identifica tion Panel Remove the three screws that secure the PIOB to the Base Casting Remove the Power I O Board from the Base Casting Continued CRI2 3 11 CRIO C Figure R4 1 Connector Locations Mode
65. or Acti vated will appear and the alignment system will stop its move ment After the alignment system stops it will then retract to the home position 13910 103 Rev B THEORY OF OPERATION Keyd Pa omo ejdsiq ejqeug 80 1 80 1 I MEME SCH uonisoq b med 33 e 119 54 uonisod ZAX gt 9 OJON 1039 Figure OP 2 Measurement System 13910 103 Rev B TROUBLESHOOTING The following lists provide suggestions for fault conditions To provide concise information on specific parts assemblies and or connector designators e g P1 they are indicated and Error Codes caused by components within the Optical Head Assembly Fig 4 7 require replacement of the complete Optical Head Assembly and will only reference the replacement assembly However if an error code can be caused by a discon Note Reference to a Harness Connection List is given in Appendix B Note followed by the associated Parts Manual figure and item number e 9 Fig 4 27 Note nected connector within the Optical Head assembly reference to that connector is also given Error Codes This instrument is designed to display error codes when a malfunction has occurred The error codes aid the technician to isolate the cause of malfunctions Causes are li
66. r to the AT555 section of the data sheet that was provided with the rubber eyes and set the Tonometer Calibration number to be the same as the Rubber Eye Assigned Value Use the RIGHT arrow to select the digit that requires modification Press the buttons below the icons to increase or decrease the value 6 Press the button below the MEASURE icon The instrument will take 5 measurements Note measurements may not match the value that was entered for that eye After all measurements are taken for the three rubber eyes the instrument will calculate the correct internal values after the calculate button is pressed Page 33 CALIBRATION T Move the Medium Eye in front of the air puff nozzle 8 While in the Tonometer Calibration menu screen press the DOWN icon button to highlight the Medium eye then press the SELECT button to modify the values for the medium eye Use the and the RIGHT buttons to modify the values for the medium eye When the number is the same as that which is on the Calibration Sheet press the button below the MEASURE icon The instrument will take 5 measurements 9 Move the High Eye in front of the air puff nozzle 10 While in the Tonometer Calibration menu screen press the DOWN icon button to highlight the High eye then press the SELECT button to modify the values for the High eye Use the and the RIGHT buttons to modify the values for the High eye When the num
67. requires adjustment e Adjust the position of the Left or Right Camera until the square dot is within the target square When the VVL Camera is within the target squares tighten the two screws on each side of the mirror to secure the position of the VVL Camera f Repeat steps d and e for the opposite Camera if required Repeat steps thru a in their reverse order for reassembly of this unit and installing the hardware Torque to approximately 7 0 Ibfein 0 8 Nem Note secure the cover to the tonometer head using four screws The four screws that are to be replaced are located only on the sides Do not replace the screws across the top of the cover Discard the extra screws 13910 103 Rev B Figure CT 7 Tonometer Head Parts Identification 5 Press the button below the SELECT icon to save the firearound data 6 Press the button below the RETURN icon to return to the Service Menu screen 7 Remove the Glass Eye tool from the end of the air puff nozzle Page 31 CALIBRATION Fire Around This procedure is used to align the electrical system to the optical system of the AT555 1 From the Services Menu screen press the button below the DOWN icon to highlight the Fire test then press the button below the SELECT icon The Fire Around Menu will be active CAUTION USE ONLY A 13717 CALIBRATED RUBBER EYE FIX TURE THAT HAS BEEN VERIFIED FOR ACCURACY AT THE REIC
68. rors for this instrument however continuous information will be added at each revision to this manual as it is revised Note provide concise information on specific parts assemblies and or connector designators e g P1 are indicated and followed by the associated Parts Manual figure and item number 0 Fig 4 27 Note Reference to the Harness Connection List is given in Appendix B Miscellaneous System Errors Table all Models Definition Screen Blank eet Screen Bright with no data showing Disengage Travel Lock Showing Too Close Message Showing Touch Sensor Message Showing Page 14 Probable Cause Unit in Sleep Mode No power applied to unit Reset Button Fig 4 28 stuck Contrast knob turned down Fuse s Blown Transformer fused winding opened Switching Power Supply defective Fig 5 35 Disc d J13 Fig 4 27 Disc d Defective LCD Screen Defective Inverter Board Data Cable to LCD Screen not connected Travel Lock Engaged 42 J8 J10 J12 Fig 5 35 Disc d Sensor Flags for the XYZ Home Switch X Y and or Z positioning motor damaged Eyelashes touching the end of the air tube Touch sensor contaminated Touch sensor circuit defective Continued on next page Solution Depress any button Apply input power Release stuck button for 13910 and 13911 only Adjust contrast knob for 13910 and 13911 only
69. s procedure 13910 103 Rev B 11 Press the red reset button located behind the printer door and ensure that the unit restarts correctly Press any key to continue Models 13910 and 13911 only Note If any of these final checks are not within the limits of what is expected or performing as expected you may call Reichert Inc at the number indicated in the Intro duction section of this manual and arrange to return the instrument for service 12 Press the button below the MODE icon and then press the button below the LOCK icon This will move the tonometer head into position so that the travel lock can be secured 13 Secure the travel lock by inserting a Phillips 2 screwdriver into the travel lock slot behind the printer door and push it forward so that it mates with the screw and then turn the screw clockwise until it is hand tight approximately 4 full turns Note description with pictures of engaging the travel lock is provided in the User s Guide for your reference 14 This completes the final checks for the unit The unit should be ready for packaging and or transportation Page 35 CLEANING Introduction This section contains the cleaning procedures Names given to parts are the same parts as referenced in the AT555 Parts Manual P N 13910 102 Special Tools amp Equipment None Required Warnings amp Cautions CAUTION DO NOT USE SOLVENTS OR STRONG CLEANING SOLUTIONS ON ANY PART OF THIS INST
70. sing technique a process for which patents have been issued to provide precise alignment of the system to the eye After the right side Position LED Camera receives its data the left side Position LED and camera alternately turns on and acquires its data The right and left side Position LED s are alternately activated to allow for three dimensional posi tioning 13910 103 Rev THEORY OF OPERATION Position LED Position Lens R LED Driver Position LED Camera DC Bus R Video 12 Bus L Video E Display Control Bus Video Bd Control Bd 1 0 Bus L Data Valia P ucms I OBd Display Bd M pos Camera Set Data Valid 1 9 Motor Bd Motor Status 1 O Bus L LED Driver Figure OP 1 Alignment System 13910 103 Rev B Page 7 THEORY OF OPERATION Air Puff System The AT555 air puff system produces a small puff of ambient air from the air tube when the patient is fully aligned in front of the instrument This puff of air is directed at the center of the cornea and when aligned causes the cornea to
71. sted in sequence of probability first probable cause listed is the most likely cause or the easiest to test The following list contains the error codes and their definition Note When Error Codes are displayed it is suggested that the instrument be re booted remove input power and then re apply input power as the Error Code may be the result of a computer glitch If after input power is reset and the unit continues to display the Error Code continue to the Error Code Table and check the probable cause Error Code Table Models 13910 and 13911 only Code Definition 1 CPU diagnostic failed 2 RAM diagnostic 3 PROM diagnostic 4 diagnostic failed 5 EEPROM diagnostic failed 6 A motor 7 Y motor failed 8 Z i br tree ee 9 System failed to home motors 10 Travel lock is 11 System failed to park 12 Stray light has been detected 13 Positioning motor error 14 Left VVL camera Probable Cause Defective Control Board Fig 4 12 Defective Control Board Fig 4 12 Defective Control Board F
72. te itor icr editore qu oer ERO 32 Tenotnieter Alignmerit eie tete ote ex diem ee e ax e PI OR RE 33 R bberiEye Gallbfation o ttt tte esce eee detaches Oeo ncaa Eee eta Ee ber 33 eese s Ere 35 Cleaning InttodHetlOri se temer R 36 special Tools amp Equipment trm to e OR GP EO Per to rov dee nre led 36 Warnings amp Cautlons rede ative FERT walla ppt rie e d en ga pd ee ined is 36 Alignment Window Cleaning Procedure tentent tente tenente tenes 36 Ait Tube Cleaning iie e tern irte imn d ees ie eee po ve eerte 36 Extemal Cleaning Proced re 2 erinnere ter eerte teer tet rien pen eto re n tede eer a Pe eee ied 36 General Disassembly isis scene acuta ertt Pe t e 37 Repairs a M 38 Special Tools amp EQuip Ment ad rere eene fedet 38 Warnirigs amp Cautions tete reta n be e RR 38 Repair 1 Nosepiece Cover Replacement teens 39 Repair2 Printer Door Latch Replacement 4 100000 eene entente tene 39 Repair 3 Printer Replacement eicit eere ep 40 Repair4 Pow
73. ure the J2 data harness to the tie wrap mount on the CCB using a plastic tie wrap 5 Perform the steps in the Assembly section of this manual 13910 103 Rev B REPAIR 6 Motor Circuit Board Replacement This section details the steps necessary to remove replace the Motor Board Note Refer to Figure TT 7 for an illustration of the Motor Cir cuit Board CAUTION THE INTERNAL CIRCUITS OF THIS INSTRUMENT HAVE ELECTROSTATIC DISCHARGE SENSITIVE DEVICES ESDS AND ARE SENSITIVE TO STATIC HIGH VOLTAGES STORED IN AND TRANSFERRED BY THE HUMAN BODY OBSERVE CORRECT ESDS PRECAUTIONS OR PREMATURE MALFUNCTION OF THIS INSTRUMENT WILL OCCUR Motor Board Removal 1 Install identification tags to the connectors that attach to the Motor Circuit Board also referred to as MCB as the connectors across the top of the MCB have the same colors and will physically interchange but will show error codes if power is applied to the unit and the connectors are not correctly attached 2 Remove the four screws that attach the MCB to the XYZ support bracket 3 Remove the plastic tie wrap that secures the wires from the XYZ Assembly to the J4 connector on the MCB 4 Observe ESD precautions and remove the new MCB from its antistatic bag Disconnect one connector from the damaged MCB and install it onto the new MCB Repeat this step until all connectors are installed onto the new MCB 5 If the new MCB does not have a chips in its XU5 XU6 and XU7 so
74. ut power connector 2 Adjust R1 until the voltage at TP9 is set as indicated in Table 1 while referencing the correct LCD Assembly 3 Apply one small drop of enamel paint e g nail polish to the top of R1 so that it will not be moved accidently LCD Part Number 13960 966 TP9 R1 085 50 03 VDC LCD Contrast Adjustment P Ns 13910 and 13911 only This procedure details the adjustment of the LCD contrast control on the Power Input Output Board Refer to Table 1 for the volt ages required at the test points TP To determine which LCD you have or are replacing refer to Figures 1 and 2 Note For P N 13912 the brightness and contrast are software controlled and do not require any voltage adjustment 1 Adjust the external contrast knob near the RS232 connector to mid range 2 Apply the probe of a digital voltmeter to TP2 on the bottom circuit board and the probe to pin 5 of the RS232 connector located next to the input power connector 3 Adjust R20 until the voltage at TP2 is set as indicated in Table 1 while referencing the correct LCD Assembly 4 Apply one small drop of enamel paint e g nail polish to the top of R20 so that it will not be moved accidently TP R20 18 0 0 2 VDC 13900 403 075 50 03 VDC 19 5 40 2 VDC Table 1 Test Point Voltages Figure TT 1 LCD P N 13960 966 13910 103 Rev B TESTING Test Point Voltages The following information re

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