Belmont 900 Series Betriebsanleitung

Troubleshooting

In the case of a trouble, please see troubleshooting below, so it may help you to solve the problem or to find

the solutions. The troubleshooting described speculates on various problems. If the problems or symptoms

are not listed here, please contact Takara Belmont.

CAUTION:

Please make sure disconnect power supply line before repair or replace defective parts. If not, it may cause

injury from electrical shock. Special care must be taken when repairing the chair motor, capacitor, solenoid

valve and power supply cable which parts are operated with high voltage.

High voltage parts

* Unit in j-box : power cable, power switch, fuse, air switch, terminal block, transformer, Noise filter,

900LED Power supply PCB.

* Chair : Motor, capacitor, solenoid valve, power cable, chair PCB (input voltage).

In the case of the repair of the chair hydraulic circuit. Make sure that the hydraulic circuit is not pressurized

before removing the hydraulic parts such as motor, solenoid valve and cylinder.

Remove the chair to lowest end and fully reclined position for unpressurized chair position by “LIMIT

MODE”.

Table of Contents

900LED Dental Light Troubleshooting

Book No. 1E05K7A0

Detal of Sensor Control PCB.

Intensity volume lower limit adjustment

900LED Dental Light Troubleshooting

Defective

Part

Symptom Check Point Possible Cause Solution

Check the sensor/manual (mode selection switch) on the

cuspidor front panel

Sensor/manual switch (mode selection switch) is off Select manual or sensor mode

Check harness between 900 power pcb (CN204) and

sensor/manual mode switch (1:Pink, 2:Bright green)

Disconnection or break of harness if no continuity Repair or replace harness

Check LED module Damage LED module Replace LED module Assy

Check input voltage of LED module (approximately

DC20V)

Disconnection or damage the harness between 900 power

pcb and LED module if there is no power

Repair or replace harness

There is power (current voltage) on the terminal block on

j-box connecting to 900 power pcb > Defective noise

filter section or 900 power pcb.

Replace noise filter or 900 power pcb

There is input power (current voltage) to 900 power pcb

(CN101) > Defective 900 power pcb.

Replace 900 power pcb

Check the touch less switch Dirty sensor cover Clean the sensor cover (Toush less sensor surface)

Check sensitivity of touchless sensor Improper setting of sensitivity Adjust sensitivity screw on the touch less sensor pcb.

Check harness between sensor pcb (CN1) and sensor

control pcb (CN4) (1:Yellow, 2:Green, 3:Blue)

There is no continuity > Disconnection or damage of the

harness

Repair or replace harness

Check harness between 900 power pcb (CN202, 1:black,

2:White) and sensor control pcb (CN1,1:black, 3:white)

There is no continuity > Disconnection or damage of the

harness

Repair or replace harness

Check harness between sensor control pcb (CN6, 1: light

blue, 2:N/A.) and sensor/manual select switch

There is no continuity > Disconnection or damage of the

harness

Repair or replace harness

Clean the sensor cover (Toush less sensor surface)

Check fixing position of touchless sensor (pcb) >

Replace touchless sensor (pcb)

Can't not improved from above action > Defective sensor

control pcb.

Replace sensor control pcb.

LED2 (Yellow) on the sensor control pcb is not light up

when pass your hand to touchless sensor or continuously

light up before pass your hand to touchless sensor

16.Dental

Light 920

Light does not turn on

at both manual and

sensor mode

Check input power of 900 power pcb

Light does not turn on

at sensor mode

Check operation of touchless sensor

2 / 5 150830

900LED Dental Light Troubleshooting

Defective

Part

Symptom Check Point Possible Cause Solution

Check the sensor/manual (mode selection switch) on the

cuspidor front panel

Light doesn't turn off even selected to OFF mode >

defective sensor/manual mode switch

Replace sensor/manual mode selection switch

Check operation of touchless sensor

LED2 (Yellow) on the sensor control pcb is not light up

or continuously light up when pass your hand to

touchless sensor

Check fixing position of touchless sensor (pcb) >

Replace touchless sensor (pcb)

Check display LED (Yoke section) If the display LED (green) is blinking > composite mode Switch to normal mode

Check status of sensor/manual select switch Mode becomes manual mode Switch to sensor mode

Check harness between intensity volume and LED display

pcb and sensor control pcb. (1:Red, 2:Orange, 3:N/A) *

Volume switch line

There is no continuity > Disconnection or damaged

harness

Repair or replace harness

Check around equipment

There is other equipment generated noise around dental

light

Turn off main switch and contact your dealer

Check around dental light

Malfunction occurs when light head close to room light >

room light affects touchless sensor

Turn off main switch and contact your dealer

Check LED module Break in the lead wire of LED module Replace LED module Assy

Check 900 power pcb Defective 900 power pcb Replace 900 power pcb

Head moves horizontally Head angle is not upright

Adjustment of head angle (refer to the separate

installation manual)

Balance arm moves up or down Misalignment of balance arm spring nut

Adjustment of balance arm spring nut (refer to the

separate installation manual)

Loose brake set screw (M5x2pcs) inside light pole

Adjust or tighten set screw (refer to dental light

manual)

Cuspidor section is not flat

Adjustment of cuspidor section (refer to the

installation manual)

Horizontal arm moves

16.Dental

Light 920

Light does not turn off

Can't adjust intensity

No constant light

intensity

(light flickers, Blinking

or only light up 5 LEDs

)

Light position is not

stable

3 / 5 150830

Detail of 900LED (300LED) Sensor Control PCB Sep-16

Setting of Dip Switchs (SW3 & SW4) and Jumper Pin (JP3)

901/902/

905

920S for

Clesta II

SP-CLEO2

920S for

CP-ONE

PLUS

1 OFF OFF OFF

2ON ON ON

3ON ON ON

4OFF OFF ON

5 OFF OFF OFF

6 OFF OFF OFF

7 OFF OFF OFF

8 OFF OFF OFF

PC PC 232

LED blink setting of

Composite Mode

Sensor activation setting

OFF : Activate when a hand goes away.

ON : Activate when a hand comes in.

Includes Composite Mode

OFF :With Composite Mode, ON: Without Composite Mode

Speed setting of

communication line

OFF : 4800bps, ON: 2400bps

PC side: Clair Unit, 232 side: CP-One plus

Setting condition

No.

PC side: Clair Unit, 232 side: CP-One plus

SW3

SW4

OFF: Slow blinking, ON: Rapid blinking

JP3

Test mode ( Always OFF)

OFF : Normal operation, ON: Test operation

Transition time to

Composite mode (by a

sensor)

OFF : 1 second, ON: 2 seconds

Wake-up brightness setting

from light OFF condition.

OFF : 1. Composite Mode when a light is turned on by using a

sensor.

: 2. Keeps on getting on/off signal from dr table, light stays in

composite mode

ON : 1. Regular Mode when a light is turned on by using a sensor.

: 2. Keeps on getting on/off signal from dr table, light goes

into regular mode.

Combining dental unit

OFF : Clair unit, ON: CP-One plus

LED1

LED2

SW1

SW2

CN1

CN6

CN5

CN4

CN9

CN10

CN12

SW4

JP3

JP2

JP1

SW3

TP1_Measurement Pin (GND) of CN1

TP2_Measurement Pin (DC5V) of CN1

SW3 Dip Switch No1 to No8

CN11

TP1

TP2

LED1 (Green) _ PCB Power LED

LED2 (Yellow) _ Touch-less Sensor Signal LED

SW1_ VR lower limit setting

SW2_ Manual SW for operation test

SW3_ See below

SW4_ Type of communication (See below)

JP1,2_ writing program data

CN1_Input Power (DC5V)

CN4_To Touchless Sensor PCB

CN5_

To Display LED PCB (Display LED)

CN6_To Power PCB (PWM Output)

CN9_To Display LED PCB (Volume)

CN10_RS230 Communication (CP ONE PLUS)

CN11_PC Communication (Clesta II)

CN12_PC Communication (N/A)

Intensity volume lower limit adjustment

SW1

SW2

In the case of replacing the light head or sensor

control PCB. Set lower limit position of intensity

control volume into the sensor control PCB.

*Set to sensor mode and turn off light by touch

less sensor.

1. Turn intensity control volume to left end

2. Press SW1 [CHECK] once

3. Press SW2 [ON_OFF] once

Intensity

control

volume

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