kanmed Baby Warmer Infant warmer Service Manual
Contents
1. Edge cover 700 0253 Lighter Plug 700 0274 3pole DIN plug battery cable _ halale i fi fie ff ff fo ff fe ff fa fa fa sa oa 700 0255 Elastoseal 700 0459 Capacitor 22uF 50V 105 C 700 0231 Transformer BW 50 07x User manuals can be downloaded from internet Page 4 of 8 Service manual KANMED Baby Warmer 4 DISMANTLING AND REASSEMBLING PROCEDURES WARNING Always disconnect the mains cable before opening the instrument CAUTION Work only on properly grounded static free working stations following ESD rules The following procedures are described below 4 1 BOTTOM PLATE 4 2 RUBBER EDGE COVERS 4 3 MAIN PCB 4 FRONT REAR PANEL 5 FRONT PCB 6 HANDLE DRS 4 1 BOTTOM PLATE Place the instrument upside down e Remove the 6 screws Slide the bottom plate towards the front panel until it comes free from the rear edge cover and then lift off the bottom plate and disconnect the ground wire Don t forget to reconnect the ground wire or it may cause short cuts 4 2 RUBBER EDGE COVERS Edge covers are only removed if you have to exchange front or rear panels Edge covers are glued ELASTOSEAL A07 se SPL to the housing but not to the bottom plate 1 Break the bonding of the glue from the 3 sides of the housing by applying force and if nessecary cut with a thin blade without damaging the painting Sometimes it will be nessecary to replace the runner edge 2 Grip the edge cover in2. a corner and lift it a few mm to free the inside groove of the cover from the protruding part of the front oe rear panel and pull the cover from the housing REMOUNTING Apply a thin layer of ELASTOSEAL A07 on that part of the housing that will be covered by the edge cover before mounting the edge cover 4 3 MAIN PCB 1 Dismount the bottom plate 2 Disconnect connectors P1 P4 P5 and P6 se page 12 NOTE When disconnecting connecting P1 support the PCB in order to avoid heavy bending which will damage components 3 Remove the 4 pcs PCB mounting screws 4 Grip the PCB by the battery holder and relays and pull the PCB towards the rear panel until sockets 17 8 come free from pins P7 8 on the front panel and then lift the PCB out from the housing 4 4 FRONT AND REAR PANEL 1 Dismount the edge cover according to procedure 4 2 2 Disconnect the panel to be removed from the Main PCB 3 Remove the 4 screws that fit the panel to the housing and then pull off the panel from the housing and disconnect the ground wire Page 5 of 8 Service manual KANMED Baby Warmer 4 5 FRONT PCB 1 Remove the front panel according to procedure 4 4 2 Remove the 2 nuts and then pull off the PCB from the panel 4 6 HANDLE Thread a screwdriver Phillips through the hole in the handle and unscrew the screws NOTE If for some reason the handle is not remounted the mounting holes for screws must be fitted with M5 screws max length 25 mm to preven
3. Service manual KANMED Baby Warmer Service Manual KANMED BABYWARMER Part no BW 50 079 5B 0413 Modifications Any modifications on the control unit control unit electronics heating pad water mattress and baby nest will void KANMED s responsibilities totally and are not allowed without the written consent of KANMED Caution Please read this manual carefully Incorrect use and service of patient warming equipment may cause serious patient injury CONTENTS 2 a m Introduction Principles of operation Spare Parts and exchange units Dismantling Reassembling Procedures Repairing Troubleshooting Temperature measurement Software information Wiring Diagram ONDUA WNE ANADUANN Manufactured by KANMED AB Gardsfogdevagen 18B SE 168 66 Bromma Sweden Tel 46 8 564 80 630 Fax 46 8 564 80 639 www KANMED se 2005 03 24 Page 1 of 8 U U U U UU Service manual KANMED Baby Warmer 1 INTRODUCTION For a general description of the KANMED Baby Warmer and how to verify that it is functioning properly we refer to the user manual In case you do not have one it can be downloaded from internet in several languages Se www KANMED se This service manual describes the basic functions of the KANMED Baby Warmer and how do determine faults and do smaller repairs KANMED s service policy states that only properly trained distributor technicians and qualified Hospital technicians may carry our re
4. W50 Exchange part No Designation 700 0234 EU Main PCB KBW50 Exch Unit 700 0235 EU Front PCB KBW50 Exch Unit Exchange Units will be supplied at a fixed price marked repair price on the spare parts price list This price is equivalent to the estimated average repair cost independent of the type of fault if the returned faulty PCB is found to be repairable For returned faulty PCBs which are found not to be repairable we offer you to buy an Exchange Unit at a special price marked selling price on the spare parts price list For returned PCB s which are cannibalised an extra charge to cover the cost of the missing components will be added to the Exchange Price 3 3 SPARE PART LIST SPL Part No Designation No pack 700 0267 Bottom plate 700 0234 Main PCB KBW50 700 0234EU Main PCB KBW50 repair price 700 0234EU Main PCB KBW 50 sell price 700 0280 Housing KBW50 700 0324 Fuse T3 15A 700 0282 PROM KBW50 700 0260 Ground cable assy KBW50 700 0259 Ground cable KBW50 700 0269 Battery LR6 alkaline 700 0233 Fuse holder 700 0001 Fuse T1A L250V 700 0079 Fuse T 2A L250V 700 0232 Mains inlet and filter 700 0244 Potential equalisation stud 700 0279 Rear panel KBW50 with label 700 0271 Cable assy 7 pool KBW50 700 0268 Handle 700 0235 Front PCB KBW50 700 0264 Front panel KBW50 with label 700 0272 Cable assy 3 pol KBW50 ml 700 0230
5. ch SS and also activates the beeper and the electronic failure LED The EEPROM is used to store calibration values for T1 and T3 input circuits The supply voltage to the control unit can either be mains voltage 115 230 V AC or DC voltage 12 24V from a battery Both supply voltages can be connected simultaneously but the first choice of the unit will always be the mains supply If the main disappears is switched off by the ON OFF switch or is not present at start up RE1 will close and connect the DC supply to unit At each start of the warming the CPU issues a test signal to the safety logic and all safety circuits are tested during the so called self test Only if all tests are successfully completed can the CPU continue to operate and start the warming Page 2 of 8 Service manual KANMED Baby Warmer Fig 1 BLOCK DIAGRAM KBW50 Page 3 of 8 Service manual KANMED Baby Warmer 3 SPARE PARTS AND EXCHANGE UNITS 3 1 SPARE PARTS POLICY KANMED keeps and supplies spare parts considered necessary to keep a good service level These are to be found in the spare part list WARNING Certain components must not be replaced unless you have the possibility of carrying out a calibration of the unit Study section 5 2 REPAIRING carefully before carrying out any PCB repairs 3 2 EXCHANGE POLICY To simplify repair procedures and keep repair time low KANMED runs an exchange service for the Main and Front PCB of the KB
6. n the pocket of the water mattress and put it on the foam mattress Tape the skin sensor on the top centre of the water mattress and cover with the blanket There must be water and no air bubbles in the water mattress Make sure there is very good contact between the sensor and the water mattress to avoid false readings 3 Start the heating with and note the temperature of the water mattress about 10 min after the set temperature has been reached 4 The recorded temperature should be set temperature 0 5 C pe Page 6 of 8 Service manual KANMED Baby Warmer Regulating and measuring of water temperature Over temperature alarm water temperature gt 39 5 0 5 C Element temperature limitation 43 C Note The T1 T2 and T3 values indicated are depending on the temperature of the Heating Pad To obtain absolute true R values the Heating Pad has to be kept at a known temperature like in a water bath Temperature C KQ Temperature C Ko ea KQ 20 12 492 28 8 7774 36 6 2675 21 11 942 al 29 8 4083 1 37 6 0155 L 22 11 419 30 8 0568 38 5 7751 23 10 922 ar 7 7218 asi 39 5 5456 24 10 450 ait 32 7 4026 40 5 3264 25 10 000 33 7 0983 41 5 1170 26 9 5722 34 6 8082 42 4 9170 27 9 1650 35 6 5314 i es ae 7 SOFTWARE INFORMATION The KBW50 operating program is stored in the 256k PROM D8 which is mounted on a socket on the Mains PCB PROM versions of the KBWSO are designa
7. pairs on the main PCB Instead we ask you to make full use of our PCB exchange program because this ensures the delivery of a tested and calibrated replacement PCB with 3 months warranty 2 PRINCIPLE OF OPERATION See also diagram page 3 and 9 The KANMED Baby Warmer is an electrically heated and precision controlled water bed for infants It consists of a control unit and a heating pad which is inserted into a pocket in the water mattress The heating power to the heating pad is supplied by the control unit via power switches PS1 and PS2 The heating pad contains the heating element RL and thermistors T1 T2 and T3 T1 and T2 sense the temperature of the water in the mattress while T3 senses the temperature of the heating element in the pad Using the information about element temperature supplied by T3 the CPU controls PS1 to limit the element temperature to about 43 C as long as the actual water temperature is lower than the selected temperature Via T1 the CPU monitors the temperature of the water in the mattress and when the set temperature is reached the CPU controls PS1 to keep the water temperature at the set value T2 controls PS2 independent from the CPU and if for some reason the temperature of the water exceeds 39 C T2 will switch off PS2 and stop the heating altogether and also activate the beeper and the over temp LED The watchdog monitors CPU operation and in case of a CPU failure switches off heating via the safety swit
8. t liquid from entering the unit 5 REPAIRING 5 1 GENERAL Trouble shooting and repairing should only be carried out by experienced electronic engineers using proper tools and test equipment and with reference to descriptions and circuit diagrams provided in this manual See point 6 about temperature measurement We recommend to use our EXCHANGE PCB SERVICE 5 2 WARNINGS AND CAUTIONS WARNING Whenever voltage regulator N7 operational amplifier N4 connector P1 and associated components are replaced or re soldered the KBWSO has to be calibrated according to section 7 Only KANMED can do this WARNING When operating the KBW50 with the bottom plate removed AC voltage higher than 300 V will be exposed Take precautions to avoid electrical shocks WARNING Even after disconnecting Mains Power from the unit capacitors may still carry voltages Take care to avoid electrical shocks CAUTION The KBW50 contains static sensitive CMOS devices which may be damaged by improper handling Do not handle except on properly grounded static free working stations Handle all Printed Circuit Boards PCB by their edges do not touch any parts unnecessarily CAUTION All PCB s sent back for repair or exchange must be properly packed in conductive packing material or they will not be repaired 6 TEMPERATURE MEASURING Equipment needed Precision thermometer with skin sensor Afoam mattress about 50 mm thick Standard hospital baby blanket Place the heating pad i
9. ted Vx xx were x xx is the version number PROM version indication takes place at every start up at the end of the self test The actual indication consists of 5 flickering of a temp LED as follows D Flickering temp LED PROM version 25 1 02 30 1 03 34 1 04 Software History Up to now the following Software Versions exist Sw version Issued Features Compatibility V1 02 96 35 1 production series V1 03 96 47 Incorporates T1 T3 testing Replaces all V1 02 PROMS Accepts new Calibration box Senses 12 24 V external battery v1 04 98 39 Improved safety replaces all V1 02 and V1 03 Page 7 of 8 Service manual KANMED Baby Warmer 8 Wiring Diagram Fig 13 Wiring diagram
Download Pdf Manuals
Related Search