Ogawa OG8020 Handbuch

Maintenance Service Manual

OG8020

Catalog

1: Precautions for inspection and repair

2: OG8020 massage chair auto-check list

3: Common Troubles and Maintenance Methods list

4: Tools List

5-1: Guidance of Disassemble the backrest

5-2: Guidance of Disassemble the tablet holder

5-3: Guidance of Disassemble the side board

5-4: Guidance of disassemble the arm massage assembly and keys on side

baord

5-5: Guidance of disassemble the shoulder massage

5-6: Guidance of disassemble the backrest frame

5-7: Guidance of disassemble the backrest cable

5-8: Guidance of disassemble the massage mechanism

5-9: Guidance of disassemble the 3D PCB

5-10: Guidance of disassemble the power amplifier PCB

5-11: Guidance of disassemble the fabric & the air bag of backrest

5-12: Guidance of disassemble the PCB tray

5-13: Guidance of Disassemble the Main PCB, power PCB and blue tooth PCB

5-14: Guidance of disassemble the inflator pump box

5-15: Guidance of disassemble the thigh massage unit

5-16: Guidance of Disassemble the backrest pad

5-17: Guidance of Disassemble the seat pad

5-18: Guidance of disassemble backrest actuator

5-19: Guidance of disassemble footrest actuator

5-20: Guidance of disassemble the Z-G actuator

5-21: Guidance of disassemble the lower side board and rear roller

5-22: Guidance of disassemble the footrest and footrest PCB

5-23: Guidance of disassemble air valves inside footrest

5-24: Guidance of replace the footrest extend assembly

1. Precautions for inspection and repair

Inspection

Verify that the power cord is tightly connected on the machine.

Be careful to avoid electric shock.

Repair

Power off the supply before repair work begins.

Keep things tidy and in order during repair work.

When changing more than one part, identify the parts that are damaged and reuse

the serviceable parts.

During the dismantling or assembling process, do not damage other parts and PCB.

Be on the alert for loose or disconnected connectors during repair.

Do not leave any screws or other foreign objects in the unit after it is assembled.

Carry out test operation of the machine after the repair work is done.

It is preferable to perform the repair work on a carpet to prevent scratching or

dirtying the unit.

Clean the workplace after repair work is completed.

OG8020 Massage Chair Auto-check List

STEPS OF START Automatic detection:

Service=>Technical support=>Automatic detection

code

Phenomenon

Malfunction description

Solutions

Remarks

Main PCB can't

receive signals

from 3D PCB

1.Backreat cable is not

well connected.

2.Backrest cable is

broken

1.Check backrest cable

connecter. Make sure it

is perfectly

connected.

2.Change backrest

cable.

Turn on the

chair, it

will check by

itself

Signal from rolling

motor counting

sensor is abnormal

1. Rolling motor counting

sensor is defective.

2. Rolling motor counting

sensor is not well

connected.

3.3D PCB is defective

1. Change rolling motor

counting sensor.

2. Check whether

rolling motor counting

sensor is well

connected.

3.Change 3D PCB

Turn on the

chair, it

will check by

itself

Some key is keep

press for over 45

seconds

1.Some key on side board

is get stuck.

1.Change right side

board

Turn on the

chair, it

will check by

itself

Main PCB can't

receive signals

from footrest PCB.

1.Footrest cable is not

connect good

2.Footrest cable is

disconnected

1.Reconnect footrest

cable

2.Change footrest

cable

Turn on the

chair, it

will check by

itself

Signals from wideth

inspection board is

abnormal

1.Wideth inspection

board is defective

2.Wideth inspection wire

is defective or not well

connected.

3.3D PCB is defective

1.Change wideth

inspection board

2.Change wideth

inspection board wire.

3.Change 3D PCB.

when start

automatic

detection

Can't receive wide

signal

1.Wideth inspection

board is defective2.The

wire of wideth inspection

board is broken or not

disconnected

3.3D PCB is

defective4.Kneading

motor is dead or kneading

motor belt is loosen

1.Change wideth

inspection

board.2.Change the

wire of wideth

inspection board

3.Change 3D PCB

4.Fixing kneading belt

or change massage

mechanism

when start

automatic

detection

3D PCB can't

receive mid signal

1.Wideth inspection

board is defective

2.The wire of wideth

inspection board is

broken or disconnected

3.3D PCB is defective

4.Kneading motor is dead

or kneading motor belt is

loosen

1.Change wideth

inspection board.

2.Change the wire of

wideth inspection

board 3.Change

3D PCB

4.Fixing kneading belt

or change massage

mechanism

when start

automatic

detection

Can't receive

narrow signal

1.Wideth inspection

board is defective

2.The wire of wideth

inspection board is

broken or not well

connected

3.3D PCB is defective

4.Kneading motor is dead

or kneading motor belt is

loosen

1.Change wideth

inspection board.

2.Change the wire of

wideth inspection

board 3.Change

3D PCB

4.fixing kneading belt

when start

automatic

detection

Signals from wideth

inspection board is

abnormal

1.3D PCB is defective

1.Change 3D PCB

when start

automatic

detection

Though not turn on

kneading function,

but 3D PCB still

detect signals from

wideth inspection

board

1.3D PCB is defective.

1.Change 3D PCB

when start

automatic

detection

Detected signals

from up limit

sensor and down

limit sensor at

same time

1.up&down limit sensor is

defective2.The wire

which connect up & down

limit sensor to 3D PCB is

broken

3.3D PCB is defective

1.Change up&down limit

sensor2.Change the

wire which connect

up&down limit sensor

and 3D PCB.

3.Change 3D PCB

when start

automatic

detection

3D PCB didn't

receive signals

from up limit

sensor within 40

seconds

1.Up & down limit sensor

is defective

2.Up&Down limit sensor

wire is disconnected

3.Rolling motor is dead

or rolling motor wire is

disconnected

1.Change up&down limit

sensor

2.Check whether

up&down limit sensor

wire is connect good

3.Check whether

rolling motor wire is

connect good or change

massage mechanism

when start

automatic

detection

Kneading motor or

tapping motor is

overload

1.Kneading motor is

overload

2.Tapping motor is

overload

1.Change 3D PCB

When turn on

the chair.it

will check by

itself

Signals from

up&down limit

senaor is abnormal

1.Up & down limit sensor

is defective

1.Change up & down

limit sensor

When start

automatic

detection

Signals from

up&down limit

senaor is abnormal

1.Up & down limit sensor

is defective

2.Up&Down limit sensor

wire is disconnected

3.Rolling motor is dead

or rolling motor wire is

disconnected

1.Change up&down limit

sensor

2.Check whether

up&down limit sensor

wire is connect good

3.Check whether

rolling motor wire is

connect good or change

massage mechanism

when start

automatic

detection

Signals from

up&down limit

senaor is abnormal

1.Up & down limit sensor

is defective

1.change up & down

limit sensor

when start

automatic

detection

Can't detect

signals from

footrest actuator

counting sensor

1.Footrest actuaor is

defective2.Footrest

actuator motor wire is

disconnected3.Footrest

actuator counting sensor

wire is disconnected

1.Change footrest

actuator2.Check

whether footrest

actuator motor wire is

well connected3.Check

whether footrest

actuator counting

sensor wire is well

connected

when start

automatic

detection

Can't detect

signals from

backrest actuator

counting sensor

1.Backrest actuaor is

defective

2.Backrest actuator

motor wire is

disconnected

3.Backrest actuator

counting sensor wire is

disconnected

1.Change backrest

actuator

2.Check whether

footrest actuator

motor wire is well

connected

3.Check whether

footrest actuator

counting sensor wire is

well connected

when start

automatic

detection

Can't detect

signals from

backrest actuator

counting sensor

1.Z-G actuaor is

defective

2.Z-G actuator motor wire

is disconnected

3.Z-G actuator counting

sensor wire is

disconnected

1.Change Z-G actuator

2.Check whether Z-G

actuator motor wire is

well connected

3.Check whether Z-G

actuator counting

sensor wire is well

connected

when start

automatic

detection

3D limit sensor

signal is abnormal

1.3D limit sensor is

defective

2.The connecter of 3D

limit sensor is

disconnected

1.Change 3D limit

sensor

2.Check 3D limit sensor

connecter, make sure it

is well connected

when start

automatic

detection

3D limit sensor

signal is abnormal

1.3D limit sensor is

defective

2.The wire which connect

3D limit sensor and 3D PCB

is disconnected

3.3D motor is defective

or disconnected

4.Photoelectric counter

is loose

1.Change 3D limit

sensor

2.Check whether 3D

limit sensor is well

connected

3.Check whether 3D

motor is well connected

or change massage

mechanism

4.Check whether

photoelectric is loose

when start

automatic

detection

3D limit sensor

signal is abnormal

1.3D extend counting

sensor is defective

2.The wire which

connecting 3D counting

sensor and 3D PCB is

disconnected

1.Change 3D extend

counting sensor

2.Check whether 3D

counting sensor wire is

connect good

when start

automatic

detection

3D limit sensor

signal is abnormal

1.3D limit sensor is

defective

1.Change 3D limit

sensor

when start

automatic

detection

Footrest can't

extend or retract,

or signal from

footrest counting

sensor is abnormal

1.Footrest motor is get

stuck. 2.Footrest

counting sensor is loosen

3.Footrest counting

sensor is defective.

1.Reset the chair.

2.Change footrest

assembly

When turn on

the chair.it

will check by

itself

3: Common Troubles and Maintenance Methods are listed as following:

NO.

Phenomenon

Description

Maintenance Methods

No Function

When Starting.

The LCD isn’t illuminating:

①Fuse melts (in the Power Source Box or on

the transformer wire).

②Power supply circuit poorly connected.

③main PCB fails.

①Replace Fuse.

②Replace Power Box.

③Replace main PCB.

No function

when starting.

The LCD is illuminating：

①Mechanical switch fails or it’s wire is

opened.

②Up or Down Stroke Photo-electricity fails.

③Main PCB fails.

④Kneading is on without pressing any key

when starting and no response by pressing

other keys.

①Replace mechanical switch or it's

wire.

②Replace Stroke Photo-

electricity.

③Replace the main PCB.

④Width Inspection Board of PCB

fails, replace it.

No Width

switchover.

①The terminals of Width Inspection on main

PCB and wires are poorly connected.

②The terminals of Width Inspection on

massage mechanical and wires are poorly

connected.

③Width Inspection fails.

④Main PCB fails.

①&②Plug the terminal securely or

replace the wires.

③Replace Width Inspection.

④Replace the main PCB.

No Partial

Function.

①Height Inspection Terminal or wire poorly

contacts.

②Height Counting Subassembly fails.

①Plug the terminal securely or

replace the wires.

②Replace Height Counting Sub

-assembly.

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