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Kowa K9L48B Service Manual Download Page 6

GG-09001            Edition 1.3 

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2. Principles of Fundus Photography

 

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Device overview

 

 

 

 

This equipment is a fundus camera which is capable of mydriatic and non-mydriatic photography 

with two angles of view: 50° and 30° (45° and 27° for non-mydriatic photography).   

You can record photographic data with 35-mm film, video and so forth.   

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Fundus photography procedures

 

 

 

 

Summary of Contents for K9L48B

Page 1: ...GG 09001 Edition 1 3 Edition 1 3 2015 4 Model Name K9L48B...

Page 2: ...ng power supply unit P 15 6 Part Replacement Optical Head Unit P 16 Configuration of electric components P 16 6 1 Replacement parts list Optical head unit P 17 6 2 Replacing optical head unit main PCB...

Page 3: ...V P 37 8 4 Replacing the power supply fan P 37 8 5 Replacing IGBT P 37 8 6 Replacing fuse holder P 38 8 7 Replacing noise filter P 39 8 8 Replacing capacitors P 39 8 9 Replacing SMPS 12V P 39 8 10 Rep...

Page 4: ...GG 09001 Edition 1 3 1 Names and Functions of Components...

Page 5: ...GG 09001 Edition 1 3...

Page 6: ...ew This equipment is a fundus camera which is capable of mydriatic and non mydriatic photography with two angles of view 50 and 30 45 and 27 for non mydriatic photography You can record photographic d...

Page 7: ...ision corrective lens or a FA barrier filter the fundus image passes through such a lens or filter before it reaches to the focusing lens Variable angle lens Finder or CCD Camera Non mydriatic photogr...

Page 8: ...GG 09001 Edition 1 3 Principals of Fundus Photography...

Page 9: ...GG 09001 Edition 1 3 3 Block Diagram...

Page 10: ...7 8 9 10 11 12 13 14 15 16 17 18 PF11 DF1B 18DS 2 5RC PF69 mo enable HK1171 m3 5 FD LED MYD 5 K9L TB52 gnd NARROW R DEG SENS PCB VCT531 6 0 75 BLACK gnd HC K9L52 0620 MAX ISP DATA LED SL MASK K9L48B...

Page 11: ...420 118V MAX ISP shutter 24v 100V 10A 65TS100H HC K9L TB48B 0043 sig3 DC330V VR2 IGBT ON S5 gnd 5V E S1 S9 K S15 S3 HC K9L TB48B 0050 MAX ISP AUTO 1 350550 1 n 6 VA 210 S8 S16 K sig2 1 2 3 4 5 6 7 8 9...

Page 12: ...ler a common tool for VX 10 and VX 10i supplied with VX 10 into appropriate space around the connector and carefully pry out the connector Rotate the tilting handle to tilt the optical head unit to th...

Page 13: ...cap located on the cover top undo the screw and pull out the picture angle knob Undo 4 screws from the positions shown below and remove the cover Undo 3 screws and remove the cover from the other side...

Page 14: ...ndo 2 screws from the power supply unit and remove the panel cable installation plate Remove the connecter and the earth line exposed after removing the power supply unit cover in the step above Undo...

Page 15: ...e the screws and the cover together Slowly lift up the panel Do not apply excess force since cables are still connected Undo the screw and disconnect the earth line Pull out 2 cables from the PCB on t...

Page 16: ...ply unit Disconnect the external fixation lamp connector Follow the procedures described in 5 3 and and remove the power supply unit cover and the connector Undo 6 screws from the base and remove the...

Page 17: ...omponents components components components Motor drive PCB K9L52 2171 Optical head unit main PCB K9L52 2170 Fan for main body K9L45 5087 Arrow view B Arrow view B Trigger PCB K9L48 8187 Arrow view A A...

Page 18: ...0581 Ref Page P 19 Ref Page P 19 Ref Page P 19 6 5 Optical head unit fan 6 6 WD FD switch 6 7 Picture angle sensor PCB K9L45 5087 K9L45 5049 K9L48 8193 HK1093 Ref Page P 20 Ref Page P 23 Ref Page P 2...

Page 19: ...6 10 Inverter PCB 6 11 LED PCB for data card K9L48 8050A 55PW131 K9L48 8189 HK1089 Ref Page P 26 Ref Page P 26 Ref Page P 28 6 11 Timer PCB 6 12 Motor for IR filter 6 13 Finder K9L48 8188 HK1088 12C 1...

Page 20: ...n the reverse order Make sure that all connectors are securely connected 6 4 Replacing return mirror actuator Disconnect the connector connected to the component Undo 4 screws and remove the actuator...

Page 21: ...optical head unit main PCB Undo 2 screws and remove the fan unit from the optical head unit Remove all fine shuts K9L39 600 from the fan unit of the optical head unit Undo 2 screws and separate the up...

Page 22: ...reassembling the fan unit Reconnect all cables at the original positions and tie them with tying bands For the cable connecting positions refer to Precautions for part replacement Each fan has a certa...

Page 23: ...GG 09001 Edition 1 3 Optical Head Unit Fan Assembly Drawing...

Page 24: ...direction Reconnect all cables at the original positions and tie them with tying bands For the cable connecting positions refer to the step of 6 5 Replacing optical head unit fan 6 7 Replacing pictur...

Page 25: ...act PCB Disconnect the connector from the Polaroid video mount contact PCB To install the PCB follow the removing steps in the reverse order Make sure that all cables are placed behind the sheet metal...

Page 26: ...tying band Undo 4 screws and remove the 35 mm mount Disconnect the connector Undo 4 screws and remove the 35 mm mount contact PCB Install a new PCB by following the removing steps in the reverse orde...

Page 27: ...CD monitor Undo 4 screws from behind the LCD monitor and remove the rear cover Disconnect all cables shown below To disconnect the flat cable pull the brown attachment of the connector to the directio...

Page 28: ...the sheet metal Follow the steps from to to remove the target component Follow the steps in the reverse order to reassemble it If the cables can not be routed properly when installing the LCD monitor...

Page 29: ...disconnect the connector connected to the unit Undo 4 screws and remove the unit that retains the capturing LED PCB and the timer PCB Undo 2 screws and remove the capturing LED PCB Disconnect the con...

Page 30: ...2 bolts using an Allen wrench and remove the finder Align a new finder so that the diopter reading 0 on the finder faces upwards and install the finder by following the removing steps in the reverse...

Page 31: ...ew CCD unit with optical head and connect two cables with CCD unit Put white paper on the fore headrest in the tape Turn on power switch after connecting power plug 1 2 4 Set Non mydriatc mode by push...

Page 32: ...K9L48B 2257 HK1167 Ref Page P 32 Ref Page P 32 Ref Page P 32 7 4 Observation light intensity control switch 7 4 Flash intensity switch 7 5 Camera selector switch HC K9L TB48 0450 HC K9L TB52 0440 HC...

Page 33: ...move one of the cables Using a spanner remove the cable connected between the panel and the power supply Insert a screwdriver into holes of the upper PCB K9L48B 2257 HK1167 and undo 4 screws Then remo...

Page 34: ...replacement part Work on one switch at a time because removing both switch at the same time may makes you confused about which switch goes to which hole Using a spanner remove the nut from each switch...

Page 35: ...comes closer to the side where 35mm is shown 7 6 Replacing base unit dipswitch PCB When the switch panel section is already removed remove the connector from the PCB If you prefer to replace the PCB w...

Page 36: ...1 IEC60601 1 1 1 1 3rd 3rd 3rd 3rd Edition Edition Edition Edition not not not not a a a applied pplied pplied pplied Power main PCB K9L TB48B 2265 Trans K9L TB52 PT 2 IGBT PHMB400E6 SMPS 24V SNP Z059...

Page 37: ...HC K9L TB48 0110 Ref Page P 37 Ref Page P 37 Ref Page P 37 8 5 IGBT 8 6 FUSE holder 8 7 Noise filter PHMB400E6 3455LS1 SUP E15H Ref Page P 37 Ref Page P 38 Ref Page P 39 8 8 Capacitors 8 9 SMPS 12V 8...

Page 38: ...nnecting to the SMPS 24V Undo 4 screws and remove the SMPS 24V Install a new SMPS 24V and connect the connector 1 2 8 4 Replacing the power supply fan Disconnect connectors connecting to the power sup...

Page 39: ...t another brown cable which is circled in figure 4 from fuse holder and connect the cable with new fuse holder at the same position Remove the fuse holder which is connected with sky blue cables by lo...

Page 40: ...ch connected with capacitors from the power supply main PCB and IGBT etc Remove the capacitor unit by loosening two screws Replace from the old capacitors to new ones by four screws There is no sheet...

Page 41: ...lace the old Trans with new one by four screws Connect cables with new Trans as shown in figure 1 1 2 8 10 2 Replacing Trans In the case of the product is applied IEC60601 1 3rd edition Disconnect cab...

Page 42: ...leaners may leave residue after cleaning Softwood stick A softwood stick approximately 10 inches 25 cm in length with its end shaved flat Do not use hard tools such as a flat head screwdriver or a pai...

Page 43: ...approximately 2 mm off from the tip of stick Dip the tip of cleaning paper into the cleaning solution Clean a lens with a spiral motion from the center towards the rim of the lens Carefully clean the...

Page 44: ...e steps described in 9 1 Preparing for lens cleaning and 9 2 Lens cleaning procedures to clean the objective lens Since the objective lens is a large lens you may clean the lens using a sheet of clean...

Page 45: ...le remove the field lens Follow the steps described in 9 1 Preparing for lens cleaning and 9 2 Lens cleaning procedures When you complete the lens cleaning position the field lens and tighten 2 retain...

Page 46: ...ion 1 3 9 5 Cleaning finder Remove 2 bolts using an Allen wrench Remove the finder Follow the steps described in 9 1 Preparing for lens cleaning and 9 2 Lens cleaning procedures Reinstall the finder a...

Page 47: ...area indicating luminous dots in Non mydriatic Mode is decreased from the baseline intensity obtained at OFF position 5 Don t use Don t use Don t use 6 Don t use Don t use Don t use 7 The area where t...

Page 48: ...led Enabled 6 Mydriatic fluorescein angiography select switch can operate Exciter filter insertion Barrier filter insertion 7 Jig Mode Forced shutter This allows you to release the shutter whether a c...

Page 49: ...uminate Film is improperly set Is mark of the camera changeover indicator on the left hand panel flashing Set film properly When no film is loaded the mark flashes Is Polaroid mark wrongly selected as...

Page 50: ...series and upper mount of the optical head unit Clean contacts video adapter and upper mount Check settings and wiring of the DSLR In the case of using K9L RL48 series Check settings according to inst...

Page 51: ...icture angle knob is fixed in incorrect position Switch the picture angle knob to 50 External fixation lamp does not light up Posterior pole imaging or Optic disk imaging is selected Select External f...

Page 52: ...was repeatedly turned ON and OFF When you turn off the power switch wait for ten seconds before turning it ON again Should Err 2 still appear stop using the system Check the voltage from outlet the v...

Page 53: ...l Mode when Mydriatic Mode is selected Check the pupil for diameter when using Non mydriatic Mode If it is less than the specified value the center of picture becomes darkened A black dot s appears at...

Page 54: ...at head screwdriver loosen the inner black lamp cover screw Remove the observation lamp from the socket while holding the lampshade by hand Insert a new observation lamp to the end of the socket with...

Page 55: ...ht out and push straight in the bulb along the direction of electrode pin Do not apply any twisting force When installing the observation lamp securely insert the lamp to the end of the socket When in...

Page 56: ...enter Recommend to the 6th step if the swing arm is already center Unlock the horizontal lock lever Align the swing arm to center and lock the horizontal lock lever 2 3 4 5 Make the optical head unit...

Page 57: ...moved upward halfway because of unintended movement of tilting Attention Do not remove the screws It is dangerous to remove the screws because of the optical head falling down Move the optical head un...

Page 58: ...CB 2 3 Put the model eye on chin rest and then move the optical head unit to focus the illumination light onto black surface at the model eye Insert the minus compensation lens by pressing Diopter swi...

Page 59: ......

Page 60: ...Facsimile 49 211 54218410 E mail medicalde kowaoptimed com URL http www kowamedical com Medical Devices Division 20001 South Vermont Avenue Torrance CA 90502 U S A Phone 1 310 327 1913 Facsimile 1 31...

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