OS4000 Maintenance service manual
Contents
1. 12 Replacement of the front panel of seat part Turn on the power and raise the foot rest to the highest position 2 Operate the Zero G 2 function to raise the seat rest 83 Remove the screws 12pcs securing the front panel 4 Then the front panel can be removed replace it with a new one and tighten it with screws i ia P sl E i E f Raise the foot rest to the Screws 12pcs securing the front panel highest position a PDF SCPE pdfFactory Pro WARES W fineprint com cn 13 Replacement of the side board Disassemble the backrest from the chair Use a cable tie to unfasten the seat pad from the chair by the zippers Remove the screws 4pcs securing the side board Disconnect the air hose of the side cover Lift the side boards at 90 degrees then disassemble it from the chair Proceed in the reverse order of disassembly when replacement needed But please note that when you fix the side cover make sure the air hose is not pressed by the seat frame Q A eoOWO EP aE ne pee Pept HEE an ee EF Ee F i D TO Rh EET Perea ear ears E Be eee semoved the screw The front of side board Screws 2pcs securing the front panel Last lift up the side board 21 PDF xE pdfFactory Pro WHAREI www fineprint com cn 14 Replacement of the seat pad 1 Disassemble the backrest from the chair 2 Use a cable tie to unfasten the seat pad from the chair by the zippers 3 Pull2. No tapping No response when pressing the keys on the remote controller Back rest cannot be reclined or raised Terminal or Wire Poorly Contacts 2 Down stroke Photo Electricity Subassembly Fails 3 Up stroke Photo electricity Subassembly Fails 4 Rolling Motor Fails Main PCB Fails The terminals on main PCB and wires are poorly connected 2 Kneading motor fails 3 Main PCB fails The terminals on main PCB and wires are poorly connected 2 Tapping motor fails Main PCB fails The terminals and wires are poorly connected 2 The PCB in the remote controller fails 1 The terminals of reclining actuator and wires are poorly connected 2 The reclining actuator fails Main PCB fails 1 Plug the terminal securely or replace the wires 2 Replace Down Stroke Subassembly 3 Replace Up Stroke Sub assembly 4 Replace Rolling Motor Replace main PCB 1 Plug the terminal securely or replace the wires 2 Replace the kneading motor 3 Replace main PCB Plug the terminal securely 2 Replace the tapping motor 3 Replace main PCB 1 Plug the terminal securely or replace the wires 2 Replace the remote controller 1 Plug the terminal securely 2 Replace reclining actuator 3 Replace main PCB PDF FEH pdfFactory Pro WHEE www fineprint com cn Page 23 24 18 DEG Page 19 8 Page 17 6 2 Page 23 24 18 8G Page
3. down stroke photo electricity assembly Disassemble the rear cover of the back rest 2 Pull out the terminal of the wire 8 Remove the screws tightening the PCB of up or down stroke photo electricity assembly to the sheet metal with a plus screwdriver and nipper pliers 4 Proceed in the reverse order of disassembly when replacement needed Tools a plus screwdriver and nipper pliers The terminal of the wire Remove the screws 3pcs 19 PDF SCPE pdfFactory Pro WARES W fineprint com cn VII Maintenance of the seat part 9 Replacement of the remote controller holder 1 Pull out the remote controller from the holder 2 Remove the screw bolt tightening the holder 83 Take away the holder from the support 4 Install a new holder on the support Tighten the holder with the screw bolt Screw bolt 10 Replacement of the remote controller 1 Remove the screws 9pcs on the back cover of the controller 2 Disconnect the wire terminal of controller PCB Then remove the screws 2pcs on the PCB 83 Then you can replace any parts of the controller including PCB Front cover and Back cover 11 Replacement of the remote controller wire _ gt 4 Along the controller wire and remove the screws 6pcs fixing the R nip His ri Fi and disconnect wire terminal of controller aaah Replace the new wire and fix it on the board then connect the terminal of controller Screw bolt
4. front and rear cover of the back rest as it is mentioned above 2 Pull out the terminal on the board and cut the cable ties fixing the wires 8 Remove the screws securing the board then a new one can be replaced 4 Proceed in the reverse order of disassembly when assembly Tools a plus screwdriver wire cutters 18 1 terminals on the board Screws 2pcs securing the board PDF SCPE pdfFactory Pro WARES W fi neprint comcn 7 2 Disassembly and replacement of the massage mechanism Note If the swinging arms are broken or it is too noisy you can try to do something to the massage mechanism You should disassemble the rear cover and the cloth of the back rest Disassemble the rear cover of back rest remove the back pad and disassemble the cloth of the back rest cut all the cable ties tightening the wires 2 Remove the close end wire connectors of tapping motor wires then disconnect the wires 8 Pull out the terminals of the Width Inspection Board 3 PCS 4 Take down the belt of tapping motor then disassemble the tapping motor Remove the screws securing the massage mechanism on the running frame and the screws securing nylon clamp which fixes wires Adjust the position of the massage mechanism and the width of the swinging arms until the massage mechanism is taken off Adjust the position of the massage Massage mechanism taken down mechanism and the width of the swinging arms 8 Replacement of up or
5. on without pressing any key when starting Width Inspection Replace Width Board fails or not Inspection Board Page 18 7 1 Replace main PCB Page 23 24 18 PDF AFE pdfFactory Pro WHEE wyw fineprint com cn 2 No width switchover Are the terminals of Width Inspection Board and main N PCB connected securely Connect securely Y Width Inspection Board fails or not Replace it Page 18 7 1 N Replace main PCB Page 23 24 18 3 No function fixed spot or partial Are the terminals of main PCB connected Connect securely securely Replace Main PCB Page 23 24 18 4 No rolling Are the terminals of rolling motor wire and Connect securely main PCB connected securely Replace the motor Page 17 6 2 Rolling motor fails or not N Replace it Up stroke Photo electricity subassembly fails or not Page 19 8 Replace it Page 19 8 Down stroke Photo electricity subassembly fails or not Replace main PCB Page 23 24 18 10 PDF FEH pdfFactory Pro WHR Www fineprint com cn 5 No kneading N Are the terminals of kneading motor wire and main Connect securely PCB connected securely Y Kneading motor fails or not Replace the motor Page 16 6 1 Page 18 7 1 Y N Width Inspection Board fails or not Y Replace it N Replace main PCB Page 23 24 18 6 No tapping N Are the terminals of tapping
6. the main PCB box 23 PDF xE pdfFactory Pro WHAREI www fineprint com cn 4 Pull out all the terminals on the main PCB disconnect the PCB supports then the main PCB can be removed Proceed in the reverse order of disassembly when assembly Remove the screws 9pcs on the box to take down the up cover of the main PCB box Main PCB Comment You can replace the part s that may be damaged on the board referring to the picture above which to remove the screws or connectors securing the damaged part s 19 Replacement of the inflator pump and the snuffle valves Snuffle valves 1 Turn off the power then lay the back rest on the seat pad and pull out the terminals of the back rest 2 Remove the screws 2pcs securing the box of the main PCB on the iron tubes 8 Operate the Zero G 2 function to raise the seat rest then remove the screws 9pcs on the box to take down the up cover of the main PCB box 4 Pull out the terminals of inflator pump and snuffle valves Pull out the air hose connectors Pull out 4 pieces of the rubber posts with nipper pliers then the inflator pump can be removed Remove the screws tightening the snuffle valves then the snuffle valves can be replaced Proceed in the reverse order of disassembly when assembly 24 PDF xE pdfFactory Pro iWFARRAS GSE ww fi neprint com cn 20 Replacement of power supply fuse 2 Find the fuse at the bottom of the seat part Turn the f
7. 23 24 18 2 Page 16 17 6 1 8G Page 23 24 18 Page 18 6 3 Page 20 11 Page 20 10 amp 2 Page 22 15 Page 23 24 18 i Foot rest cannot be raised or lowered No gas charging in the seat pad No gas charging in the foot rest No gas charging in the veil for backrest No extending Or shrinking of the calves rest The terminals of foot rest actuator and wires are poorly connected 2 The foot rest actuator fails 3 Main PCB fails The terminal of the snuffle valves and wires are poorly connected 2 The snuffle valves fail 3 The inflator pump fails 4 Main PCB fails G The terminal of the snuffle valves and wires are poorly connected 2 The snuffle valves fail The inflator pump fails 4 Main PCB fails The terminal of the snuffle valves and wires are poorly connected The snuffle valves fail 3 The inflator pump fails 4 Main PCB fails The terminals and wires are poorly connected 2 The output voltage is not 24VAC 3 The limit sensor fail 4 Motor fails 1 Plug the terminal securely 2 Replace foot rest actuator 3 Replace main PCB Plug the terminal securely 2 Replace the snuffle valves 3 Replace the inflator pump 4 Replace main PCB Plug the terminal securely 2 Replace the snuffle valves 3 Replace the inflator pump 4 Replace main PCB Plug the terminal well 2 Replace the snuffle valv
8. 57 T 800 531 3746 F 512 828 8000 www thehumansolution com info thehumansolution com PDF xE pdfFactory Pro iW FARMAN GI St www fineprint com cn 29
9. Osaki OS4000 Maintenance Service Manual MODEL OS4000 Voltage specification 110 120V By Customer Service Department PDF xE pdfFactory Pro iWFARRAS GI St www fineprint com cn Table of Contents VII Maintenance of the seat part VII Maintenance of the footrest PDF FEH pdfFactory Pro WHEE www fineprint com cn I Specifications Description Specifications Product carton 52 4 X 30 3 X 37 2 side panel carton 3 8 X 29 6 X13 Product gross weight 284 4 Ibs Weight Product net weight 244 8 lbs Controller wire 1 3m Ee Power supply wire 2 2m Environment temperature 10 40 Contrasting humidity level 30 85RH Storage Condition otorage temperature 20 60 Storage humidity level 30 85RH Safety feature Equipped with overheated and power surge Safety protection Using benef Increasing blood circulation sing benents Relieving muscular fatigue Dimensions LxVVxH Usage Condition PDF SCHR pdfFactory Pro iH heAS G3 www fineprint com cn II Appearance of the chair Pillow Pad ee ENNS N Legrest Seat Pad Footrest PDF xE pdfFactory Pro WHAREI www fineprint com cn III Name and functions of components remote controller Remote controller Auto program buttons Main control buttons The adjustment button Length auto adjustment for back body buttons for legrest Sensor receiver Back speed Air intensity Manual back massage programs PDF xE pd
10. e rotating in high speed so make sure the power is OFF before disassembly For safety you should remove plug from outlet 6 1 Kneading motor DC 24V Disassemble the rear cover of the back rest and find the belt at top of the massage mechanism then loosen the belt 2 Find the wire of kneading motor and cut the cable ties tightening the wire with wire cutters 8 Remove the close end wire connectors covering the wires with Kneading motor 16 PDF xE pdfFactory Pro iW FARMAN GSE ww fi neprint com cn nipper pliers then disconnect the wires 4 Find 4 pieces of screws fixing the kneading motor to the sheet metal remove the screws with a plus screwdriver Replace a new one if it does work Proceed in the reverse order of disassembly when replacing a new one Note You should adjust the position of the small belt wheel so the small and big belt wheels are in the same plane to prolong the life span of the belt Cut the cable ties and remove Tools close end wire connector 6 2 Rolling motor DC 24V 1 Disassemble the rear cover of the back rest find the massage mechanism 2 Find the rail on the top of backrest and remove the screws to disassemble it 3 Disassemble the massage mechanism from the chair refer to 7 2 4 Remove rolling car take from rack rail there are 2 ways to choose but a is more convenient than b a Make the rolling motor power on then revolve it until the ro
11. e screw bolts and nuts fixing the foot rest on the seat part Proceed in the reverse order of disassembly when assembly 23 Replacement of the footrest motor Remove split pin draw out flat head rivet in the link rod rotate the foot rest backward then it will be locked by the side boards 2 Remove the screws fixing the cover of foot rest then it can be taken away 8 Remove the close end wire connectors loosen the belt and take it away Screws 9PCS fixing the cover of footrest Belt and close end wire connector 4 Remove the screws fixing the foot rest motor then it can be removed Remove the screw fixing the wheel of belt on the motor shaft then take a new motor and assemble the 26 PDF xE pdfFactory Pro iWFAhRAS GSE www fineprint com cn wheel of belt on the shaft Proceed in the reverse order of disassembly when assembly Note You should adjust the position of the wheel of belt so the two wheels are in the same plane 24 Replacement of the front and back sensors of foot rest Remove split pin draw out flat head rivet in the link rod rotate the foot rest backward then it will be locked by the side boards 2 Remove the screws fixing the cover of foot rest then it can be taken away 3 Pull out the terminal of front or back sensor Sensor Front and back sensors 4 Remove the screw bolts and nuts tightening the sensors on the sheet metal with screwdriver and nipper pliers There are
12. e zipper of the upper outer coating then Remove the screws fixing the outer coating Screws tightening the upper part Screws fixing the outer coating 4 Unfasten the zippers between the upper and lower part of the foot rest then the outer coating can be remove Proceed in the reverse order of disassembly when assembly 28 Replacement of lower outer coating of foot rest 1 First you should disassemble the whole foot rest and the cover of foot rest should be removed 2 Rotate the belt wheel to extend the foot rest to the longest position Remove the screw bolts fixing two rubber supports at the bottom of the foot rest 8 Unfasten the zipper at the bottom of the foot rest then remove the screws fixing the PE board and take away the PE board Rubber supports Screws fixing the PE board 4 Remove the nuts fixing the lower part of the foot rest Rotate the cover of the wheel castor then it can be removed Removed screw bolt fixing the caster wheel then the castor can be removed Nuts fixing the lower part Caster wheel 28 PDF xH pdfFactory Pro WHEE www fineprint com cn Remove the screws fixing the lower part of the foot rest then the outer coating can be removed Proceed in the reverse order of disassembly when assembly Castor taken down screws fixing the lower part Available from The Human Solution Design For Human Use The Human Solution 2139 W Anderson Ln Austin TX 787
13. es 3 Replace the inflator pump 4 Replace main PCB Plug the terminal well 2 Replace the main PCB 3 Replace the limit sensor 4 Replace the motor PDF FEH pdfFactory Pro WHEE www fineprint com cn amp 2 Page 22 23 16 Page 23 24 18 DY amp QEO Page24 19 4 Page 23 24 18 DY amp QEO Page24 19 4 Page 23 24 18 DY amp QEO Page24 19 4 Page 23 24 18 Page 25 22 2 Page 23 24 18 Page 27 24 Page 26 27 23 V Troubleshooting flow chart Notes for repairing chair or replacing parts 1 Make sure the power is OFF before tearing down the wires moving terminals or replacing parts 2 Semiconductors such as IC and others are very easy to be damaged by static so when you touch the PCB please make sure your body is grounding by wearing a girding static ring or your hands are touching with earthing grip household electrical appliances putting to earth such as fridges washers and so on to release all static of the body 1 No function when starting Is the LCD ae Is the fuse melted illuminating N Replace fuse Page 25 20 y N Pag Is the power cord Replace the power Are the terminals of Up open circuit supply cord and Down Stroke Connect Subassembly connected N securely securely The switches of Up and Down The EMC Board Stroke Subassembly fail or not Replace them fails or not Page 19 8 Replace it Page 23 24 18 Is kneading
14. fFactory Pro WHAREI www fineprint com cn IV Malfunction catalog Common Troubles and Maintenance Methods are listed as following ion Description Maintenance Methods Refer to The LCD isn t illuminating D Replace Fuse D Page 25 20 1 Fuse s burn out the one 2 Replace the power supply Ellipsis Is in the Power Source Box and cord amp m No Function MORETE E AE 8 Replace EMC Board Page 23 24 18 When Starting 2 Power supply circuit poorly Replace main PCB connected 3 EMC Board fails 4 main PCB fails The LCD is illuminating Replace the Up or Down Page 19 8 The Up or Down Stroke Stroke Photo electricity 2 Page Photo electricity fails 2 Replace the main PCB 23 24 18 No function Main PCB fails 3 Width Inspection Board of 8 Page 18 7 1 n when starting 2 Kneading is on without PCB fails replace it pressing any key when starting and no response by pressing other keys The terminals of Width amp 2 Plug the terminal D amp Q amp EB Inspection on main PCB securely or replace the wires Page 18 7 1 and wires are poorly 3 Replace Width Inspection Page connected 4 Replace the main PCB 23 24 18 M No Width 2 The terminals of Width switchover Inspection on massage mechanical and wires are poorly connected 8 Width Inspection fails 4 Main PCB fails PDF AFE pdfFactory Pro WHEE www fineprint com cn No Rolling 05 No kneading
15. it then the back pad can be removed 2 There are two air hoses at the bottom of the back pad pull out the connectors if a replacement needed 8 There is a zipper at the bottom of the back pad Unzip it and lift the sponge then you can see the air bags there 4 Pull out the connectors of the hoses then you can replace the air bag s if needed The zipper on the top of the backrest The zipper at the bottom of the backrest Pull out the hoses 2 Disassembly and replacement of the backrest lf the complete backrest is broken and need to be replaced please consult the steps as below 1 Find the stopper under the backrest and press it then you can fold backrest on seat part 2 Find the wire plugs and pull out them Disconnect the air hose of the backrest 8 Unattach the connecting rod and the U stay fork of the reclining actuator with a flat head rivet and pull out the split pin 4 Lift the backrest at 90 degrees then take it away from the chair 14 PDF xE pdfFactory Pro iWFAhRAS GIS wyw fi neprint com cn Lift the backrest at 90 degrees Connecting rod on the backrest U stay fork of reclining actuator on the seat Flat head rivet Split pin Disconnect the air hose of the backrest 3 Replacement of cloth of the front cover 1 Unfasten the zipper of the back pad and lay the back pad on the seat pad 2 You can find the zipper of the cloth at the left side Unzip it and replace
16. lling car take from backrest b Use tools turn around axletree to revolve until the rolling car take from backrest Find 5 pieces of screws fixing the Rolling motor to the sheet metal remove the screws with a plus screwdriver Replace a new one if it does work Rolling motor Remove the screws 2pcs revolve until the rolling car take from backrest 17 PDF SCPE pdfFactory Pro WARES W fineprint com cn Screws 5pcs securing the Rolling motor 6 3 Tapping motor DC 24V Disassemble the rear cover then find the tapping motor Cut the cable ties securing the wire on the sheet metal of EMC 8 Remove the close end wire connectors of the tapping motor wires then disconnect them 4 Loosen the belt of tapping motor then remove the screws securing the tapping motor Then the tapping motor can be removed and replaced Proceed in the reverse order of disassembly when assembly Close end wire connector of tapping motor 7 Maintenance of the massage mechanism 7 1Replacement of the Width Inspection Board Note If the massage mechanism is just kneading but no tapping or rolling or it doesn t work when power is on and the main PCB is ok in this we can think of that the Width Inspection Board fails 2 It s not necessary to disassemble the massage mechanism when replacing the Width Inspection Board just disassemble the front and rear cover of the back rest Disassemble the
17. motor wire and main Connect securely PCB connected securely X i l Y Tapping motor fails or not Replace the motor N Page 18 6 3 Replace main PCB Page 23 24 18 7 Remote controller doesn t work N Are the terminals of remote controller wire and Connect securely Connect securely main PCB connected securely Y Y The conductive rubber fails or not Replace it Page 20 11 N Replace the remote controller Page 20 10 11 PDF FEH pdfFactory Pro WHR Www fineprint com cn 8 Actuator doesn t work N Are the terminals of Are the terminals of foot rest o Connect Connect reclining actuator and main actuator and main PCB securely securely PCB connected securely connected securely The reclining actuator l Replace it The foot rest actuator Replace it Page 22 15 G Page 22 23 16 fails or not Replace main PCB Page 23 24 18 9 No gas charging Are the terminals of snuffle C Are the terminals of snuffle onnec valve for bags in the seat i valve for bags in the Foot Connect securely pad and main PCB 7 Rest and main PCB securely connected securely connected securely Y X Snuffle valve fails Replace it Snuffle valve fails or not Replace it or not Page26 19 Page24 19 N Are the terminals of Connect Are the terminals of inflator Connect inflator pump and main securely pump and main PCB connected securely PCB connected securely securel
18. nuts between the PCB and sheet metal Remove the nuts Take a new sensor then assemble the screw bolts and nuts on the PCB then fix it on the sheet metal with nuts 25 Replacement of connecting PCB of foot rest 1 First the cover of foot rest should be removed 2 Pull out all the terminals of the connecting PCB please remember the position of them 8 Remove the screw bolts and nuts fixing the PCB on the sheet metal then it can be taken down Connecting PCB Terminals of connecting PCB 4 Remove the nuts fixing on the PCB Take a new PCB then proceed in the reverse order of disassembly when assembly 26 Replacement of touchdown sensor of foot rest After disassembling the cover of foot rest you can find the touchdown sensor at the bottom of the foot rest 2 Pull out the terminal of the connecting PCB 3 Remove the screw bolts and nuts fixing the PCB on the sheet metal then it can be taken down Touchdown sensor 7 PDF xE pdfFactory Pro iWFARRAS GI St www fineprint com cn 4 Remove the nuts fixing on the PCB Take a new PCB then proceed in the reverse order of disassembly when assembly 27 Replacement of upper outer coating of foot rest First you should disassemble the whole foot rest and the cover of foot rest should be removed 2 Rotate the belt wheel to extend the foot rest to the longest position Remove the screws tightening the upper part of the foot rest 8 Unzip the sid
19. out the air hose Y connector of the seat pad 4 Find the connector of the vibration motor in the seat pad cut the cable ties tightening the wire and connector disconnect the connector Then the seat pad can be replaced Proceed in the reverse order of disassembly when assembly Air hose Y connector Cable ties tightening the wire and connector 15 Disassembly of the reclining actuator 1 Disassemble the backrest from the chair then find the reclining actuator 2 Along the connecting wires of the reclining actuator to find the 2 connectors then disconnect them 8 Remove the upper part of the front boards on the right 4 Then the reclining actuator can be disassembled Proceed in the reverse order of disassembly when assembly The connectors of the reclining actuator Flat head rivet securing the reclining actuator on the U stay fork 16 Disassembly of the foot rest actuator 1 Disassemble the backrest from the chair then find the reclining actuator 2 Along the connecting wires of the reclining actuator to find the 2 connectors then disconnect them 8 Raise the foot rest to the extreme position then find each end of the actuator is fixing on the U stay fork There are two plastic bush Footrest actuator rings in the hole Attention You must use the brace to support the footrest avoid the footrest 22 PDF xE pdfFactory Pro WHAREI www fineprint com cn drop suddenly while pulling ou
20. t plastic bush rings 4 Pull out plastic bush rings then the reclining actuator can be disassembled Proceed in the reverse order of disassembly when assembly The connectors of the footrest actuator U stay forks 17 Disassembly of the zero gravity actuator 1 Insert the power cord plug into an electrical outlet turn the power switch to the Then operation the controller to raise the foot rest to the extreme position 2 Remove the bottom part of the front boards position for idle mode w or 3 Along the connecting wires of the zero gravity actuator to find the 2 connectors then disconnect them 4 Find each end of the actuator is fixing on the U stay fork There are two plastic bush rings in the hole Attention You must use the brace to support the footrest avoid the footrest drop suddenly while pulling out plastic bush rings Pull out plastic bush rings then the zero gravity actuator can be disassembled Proceed in the reverse order of disassembly when assembly Footrest actuator 18 Replacement of the main PCB Turn off the power then lay the back rest on the seat pad and pull out the terminals of the back rest 2 Remove the screws 2pcs securing the box of the main PCB on the iron tubes 83 If you just remove the upper cover of main PCB box only just need to operate the Zero G 2 function to raise the seat rest then remove the screws 9pcs on the box to take down the up cover of
21. the cloth if needed Lay the back pad on the seat part Unfasten the zipper zip 15 PDF xE pdfFactory Pro WHAREI www fineprint com cn 4 Disassembly and replacement of the rear cover If you find any cracks on the rear cover you can proceed as follow 1 Unfasten the zippers of the outer cloth of the rear cover 2 Find 4 pieces of screws fixing the rear cover 3 Remove the screws with a plus screwdriver 4 Then the rear cover can be removed If it s damaged a new one should be replaced Attention Take care not to damage the rear cover to avoid bad external appearance Proceed in the reverse order of disassembly when assembling the rear cover Tool a plus screwdriver Screws securing the rear cover 5 Disassembly and replacement of the front cover of the back rest If you find any cracks on the front cover or any rips in the inside cloth you can proceed as follow After disassemble the rear cover you can find 6 pieces of screws fastening the front cover to back frame 2 Remove the screws with a plus screwdriver then the front cover can be removed Proceed in the reverse order of above operation if replacement needed Attention There are blocks between the front cover and back frame Tool a plus screwdriver Screws fastening the front cover to the back frame 6 6 Replacement of the kneading tapping and rolling motors Attention The voltage of this massage chair is high and the motors ar
22. use holder in the counterclockwise direction with a finger nail or a minus screwdriver 3 Take out the fuse from the fuse holder and replace with a new one 4 Put in the holder and turn the fuse holder in the clockwise direction then it will be fixed Attention 1 Make sure to use a glass tube fuse the same type 2 Make sure to turn OFF the power supply and remove the power cord plug of the main unit from the receptacle Fuse holder taken away 21 Replacement of the caster wheel 1 Remove the screws securing the rubber support 2 Pry the caster wheel with a minus screwdriver and the caster can be replaced 8 Proceed in the reverse order of disassembly when assembly Screws securing the rubber support 25 PDF xE pdfFactory Pro iWFARRAS GS www fineprint com cn IX Maintenance of the foot rest 22 Replacement of the whole foot rest Turn on the power and raise the foot rest to the highest position Then turn off the power 2 Remove the screws securing the front panel take it away 8 Find the air hose connectors of the foot rest then disconnect them Screws securing the front panel Air hose connectors of the foot rest 4 Pull out the connectors of the wires of foot rest Remove split pin draw out flat head rivet securing the link rod of the foot rest Connectors of the wires of foot rest Screw bolts and nuts Unfasten the zipper between the seat pad and foot rest then remove th
23. y Y Y Replace it Inflator pump fails or not Replace it Page24 19 Page24 19 N Replace main PCB Page 23 24 18 12 PDF AFE pdfFactory Pro WHEE Www fineprint com cn 10 No gas charging in the outer coating of backrest N The terminal of snuffle valves connected Plug terminals well well or not Y Replace the snuffle valves The snuffle valves fail or not N Page24 19 N The terminal of the inflator pump Plug terminals well connected well or not Y Y Replace the inflator pump The inflator pump fails or not N Page24 19 Replace main PCB Page 23 24 18 12 No extending or shrinking of the calves rest The terminal of the calves rest connected well or not Plug terminals well The wire with terminal connected N well or not Plug the wire with terminals well Page 27 24 The terminal of the motor connected N Plug terminals well well or not Y The limit sensor fail or not Replace the limit sensor N Y Y Motor of the cal Tail Replace the motor ves rest fails L Page 26 27 23 N Replace main PCB Page 23 24 18 Common trouble about electric control and processing methods of OS4000 are mentioned above It is for indication only 13 PDF XAFI pdfFactory Pro WHEE Www fineprint com cn VI Maintenance of the back rest 1 Disassembly and replacement of back pad 1 Find the zipper on the top of the back rest Unzip
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