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rotai RT-7900S Repair Manual
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rotai RT-7900S Repair Manual

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Repair Manual
RT-7900S

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Summary of Contents for rotai RT-7900S

  • Page 1 Repair Manual RT-7900S...
  • Page 2 Contents 01 Massage Chair Control Principle 02 Structure Instruction & Installation 03 Troubleshooting...
  • Page 3 Massage Chair Control Principle Transformer Air pump Mechanism Air valve recliner CPU chip User connecting PCB Remote controller...
  • Page 4 Maintenance Guide - Inner structure & installation 1.Inner Structure Diagram 2.Mainboard Diagram 3.Air Valve Diagram 4.Part Removal Guide and Video...
  • Page 5 Maintenance Guide - Inner Structure &Installation head piece armrest power box footrest unit...
  • Page 6 Maintenance Guide - Inner Structure &Installation 1. Inner Structure Diagram b a c k r e c l i n e r （with hall） DC24v/124mm mechanism calf recliner DC24v/80mm forwarding cylinder p o w e r DC24v/280mm...
  • Page 7 Maintenance Guide - Inner structure & installation 1.2 Mechanism’s Structure 3D vertical 3D vertical counting detection board board Width detecting detection board board Walking motor vertical hard arm motor knocking kneading motor motor...
  • Page 8 Maintenance Guide - Inner structure & installation 1.3 Power Box Inner Diagram transformer leg air pump armrest air pump 2 way air valve for seat mainboard 5V power board user connecting PCB leg communication signal control button signal...
  • Page 9 Maintenance Guide - Inner structure & installation 2.1. Mainboard Diagram legrest armres armre knead tappin back walkin vertic st air heatin motor pump chargin pump motor motor motor power AC19V air valve power legrest power APP signal right back heat armrest air sensing valve...
  • Page 10 Maintenance Guide - Inner structure & installation 2.2 User Connecting PCB Connector Diagram remote controller remote COMM signal controller signal audio signal A P P left&right signal speaker signal...
  • Page 11 Maintenance Guide - Inner Structure &Installation 2.3 Footrest mainboard connector diagram DC24V DC24V air valve input output foot extension motor C a l f e x t e n s i o n roller detection signal motor Calf PCB board COMM signal Calf COMM signal Roller motor detection...
  • Page 12 Maintenance Guide - Inner Structure &Installation 2.4 Legrest mainboard connector diagram D C 2 4 V leg&knee input heat leg extension air valve motor extension distance signal legrest COMM l e g h e a t signal input sensing signal...
  • Page 13 Maintenance Guide - Inner structure & installation 3D Interface Board Diagram 3 D m o t o r Knocking counting signal motor signal 3 D m o t o r 3D COMM width k n e a d i n g distance signal signal signal...
  • Page 14 Maintenance Guide - Inner structure & installation 2. 6 Width sensor board diagram width walking motor signal counting signal...
  • Page 15 Maintenance Guide - Inner structure & installation 3.1 Air Valve Diagram back back shoulder shoulder waist waist leg air hose 6 way air valve 6 way air valve seat 2 way air 4 way air connector valve Air Pump Air Pump...
  • Page 16 Maintenance Guide - Inner structure & installation 4.1 Armrest installation guide Get the armrest unit（Same way to install the left and right arm） 1.connect the air hose and plugs according to the matching No. and colors. 2.Attach the mounting bracket to the chair seat Square steel tube.
  • Page 17 Maintenance Guide - Inner structure & installation 4.2 Footrest Installation Guide 2.Plug it into 3. Attach the 4. Attach the 1.Find this cable chair body footrest to the footrest clip to chair body the end of the chair body...
  • Page 18 Maintenance Guide - Inner structure & installation 4.3 Head Assembly Removal Guide Unscrew these bolts U n s c r e w t h e s e bolts on the back cover Unplug the connectors and air hoses...
  • Page 19 Maintenance Guide - Inner structure & installation 4.4 Mech Removal Guide 3. Enter background mode 1 Unscrew 2 side bolts 2.Take off the Upper 4. Cut the cable tie, and choose walk motor Limit Sensor Detection unscrew the bolt and test to run the mech Board, but do not unplug it,then take...
  • Page 20 Maintenance Guide - Inner structure & installation 4.5 Mech motor removal guide 拆行走电机带轴视 拆揉捏电机视频. 拆敲打电机视频. 拆3D径向电机视 拆曲臂组件视频. 频.mp4 频.mp4...
  • Page 21 Maintenance Guide - Inner structure & installation 4.6 Power Box Removal Guide 1.Unscrew the 3 bolts on the top 2. You may replace: main board pcb, user connecting pcb, power board cover and 3 bolts on the pcb,transformer,air pump and air valve. internal cover...
  • Page 22 Maintenance Guide - Inner structure & installation 4.7 Actuators Removal Guide b a c k r e s t r e c l i n e actuator（with hall） 24V/124mm f o r w a r d i n g f o o t r e s t l i f t actuator yellow actuator color plug...
  • Page 23 Maintenance Guide - Inner structure & installation 4.8 Footrest Extension Assembly Removal Guide 1. Unscrew these 4 bolts on the top 2. Unscrew these 7 bolts on the 3. Unscrew the 6 bolts holding the cover board. bottom cover board. extension unit,then remove the left 4 screws.

  • Page 24: Troubleshooting

    Troubleshooting 1.Remote controller does not start 7.Footrest/backrest actuator does not work 2.Kneading motor does not work 8.Airbags fail to work 9.Foot extension does not work 3.Tapping motor does not work 4.Walking motor does not work 10.Mech lost control 5. 3D vertical motor does not work 11.Charging does not work 6.The fuse is blown...
  • Page 25 Troubleshooting 1. Remote controller does not start Analysis of causes： Method of exclusion： 1.Replace the remote controller. 2.Check the 5v power board indicator light to see whether it is 1.Remote controller is damaged on or off. If there is no light,then replace with a 5V power 2.5V power supply board is damaged board.
  • Page 26 faulty remote controller fuse user AC220V power power 5V power main board remote filter board connecting （power socket， switch board controller board power cord）...
  • Page 27 Troubleshooting 2. Kneading motor does not work Tapping Kneadin motor g motor Kneadin Tapping g motor motor Picture 1 Picture 2 Analysis of causes： Method of exclusion: 1.Use remote controller to power on chair, then select MANUAL mode---> SYNC 1.Motor is damaged massage.
  • Page 28 Troubleshooting 3. Tapping motor does not work kneadin tapping g motor motor tapping kneading motor motor Picture 1 Picture 2 Analysis of causes： Method of exclusion: 1.Use remote controller to power on chair, then select MANUAL mode---> SYNC 1.Motor is damaged massage.
  • Page 29 Troubleshooting 4. Walking motor does not work upper limit detection board kneadin walking g motor motor lower limit detection board 揉捏电 行走电 机插件 机插件 Picture 1 Picture 2 Picture 3 Method of exclusion: Analysis of causes： 1.Select MANUAL mode,SYNC massage then POINT mode, press the “up” or “down” keys to check if there is double beeping 1.The walking motor is damaged sound from remote controller.
  • Page 30 Troubleshooting 5. 3D vertical motor does not work kneading motor motor kneading motor motor Picture 1 Picture 2 Analysis of causes： Method of exclusion: 1.Select MANUAL mode, KNEADING massage. Find the massage mech 3D motor plug and switch it with kneading 1.Motor is damaged motor plug.
  • Page 31 Troubleshooting transformer AC21V input AC220V AC19V 6. The fuse is blown filter pcb fuse holder AC220 Picture 1 Picture 2 Picture 3 Analysis of causes： Method of exclusion: 1.Damaged fuse 1.First, make sure the fuse is burned out. and replace the fuse with the same type if the 2.Filtering pcb short circuited voltage fluctuations cause the fire to burn out.
  • Page 32 Troubleshooting 7. Footrest/backrest actuator does not work forwarding actuator yellow plug backrest footrest actuator actuator white plug backrest actuator footrest forwarding actuator actuator red plug Analysis of causes： Method of exclusion: 1.Exchange test method: plug the footrest lift actuator plug into the backrest actuator plug port,press the backrest raise/recline button,if the footrest can lift or lower,it 1.The Actuator is damaged indicates that the footrest lift actuator is good,then something went wrong with the...
  • Page 33 Troubleshooting 8. Airbags fail to work Air valve for seat side airbag left air valve right air valve Picture 1 Picture 2 Method of exclusion: Analysis of causes： 1.If part of the airbags fail to inflate,it indicates that the air compressor 1.Air hose folded or fell off functions well,check the air hoses with mentioned issue to see if they are folded or 2.Air pump is damaged...
  • Page 34 Troubleshooting 9. Foot extension does not work legrest extension legrest motor extension motor footrest Picture 1 Picture 2 legrest adjustment adjustment...
  • Page 35 Troubleshooting 10. Mech lost control Upper Limit sensor detection board Upper walking motor Limit sensor distance detection signal board Picture 2 Picture 1 Analysis of causes： Method of exclusion: 1.Check if the plug is loose,the pin of the plug fell off,or the 1.Limit Sensor Detection Board damaged connection wire is damaged.
  • Page 36 Troubleshooting 12.Charging does not work DC24V charging USB charging port DC5V Picture 2 Picture 1 1.Check if the plug is loose,the pin of the plug fell off,or the connection wire is damaged. 1.Charging board is damaged 2.Use a multimeter to test the DC24V voltage input of charging board,if 2.Mainboard damaged there is no such input voltage,the mainboard orthe wires connecting the 3.The wire harness which connects the...
  • Page 37 Thank you！...