A-Dec 200 Service guide (2014)

Service Guide

A-dec 200

Regulatory Information

A-dec Inc. makes no warranty of any kind with regard to this material, including, but not limited to, the implied warranties of merchantability and fitness for a particular purpose. A-dec Inc. shall not be held liable for any errors contained herein or any consequential or other damages concerning the furnishing, performance or use of this material. The information in this document is subject to change without notice. If you find any problems in the documentation, please report them to us in writing. A-dec Inc. does not warrant that this document is error-free.

No part of this document may be copied, reproduced, altered, or transmitted in any form or by any means, electronic or mechanical, including photocopying, recording, or by any information storage and retrieval system, without prior written permission from A-dec Inc.

Trademarks and Additional Intellectual Property Rights

A-dec, the A-dec logo, A-dec 500, A-dec 300, Cascade, Cascade Master Series, Century Plus, Continental, Decade, ICX, ICV, Performer, Preference, Preference Collection, Preference ICC, and Radius are trademarks of A-dec Inc. and are registered in the U.S. and other countries. A-dec 400, A-dec 200, Preference Slimline, and reliablecreativesolutions are also trademarks of A-dec Inc. None of the trademarks or trade names in this document may be reproduced, copied, or manipulated in any manner without the express, written approval of the trademark owner.

Regulatory information mandated by agency requirements is provided with A dec dental equipment in the Instructions for Use and the separate Regulatory Information, Specifications, and Warranty document (p/n 86.0221.00). These documents are also available at www.a dec.com in the Document Library.

The Regulatory Information, Specifications, and Warranty document includes:

• Serial number identication

• Software revisions

• Warranty statement

• Deluxe touchpad help messages

• Intended application and use statements

• Identication of symbols

• Environmental specications

• Classication of equipment

• Electrical rating and electromagnetic information

• Chair load capacity

Certain touchpad symbols are proprietary to A-dec Inc. Any use of these symbols, in whole or in part, without the express written consent of A-dec Inc. is strictly prohibited.

Product Service

For service information, contact your local authorized A-dec dealer. To find your local dealer, go to www.a-dec.com.

A-dec 200 Service Guide

A-dec 200 Service Guide Contents | 2

Contents

INTRODUCTION ................................................... 4

Get Support ............................................................................ 4

International Customer Service .................................................. 4

Other Sources of Information ....................................................... 4

Service Reference .................................................................. 4

Other A-dec Service Documents .................................................. 4

A-dec 200 System Map ............................................................... 5

Service Tools ........................................................................... 6

DENTAL CHAIR .................................................... 8

Dental Chair Product Overview ..................................... 9

Power and Status ..................................................................... 9

Limit Switch and Chair Lockout .................................................... 9

Circuit Board Components ..........................................................10

Dental Chair Service, Maintenance, and Adjustments ........ 11

Remove Upholstery and Covers ....................................................11

Factory Default Routine ............................................................12

Potentiometers .......................................................................13

Adjust the Base Up Limit Switch: ...............................................13

Adjust the Base Positioning Potentiometer ....................................14

Adjust the Back Potentiometer ..................................................14

Hydraulic System ....................................................................15

Solenoids ..............................................................................16

Test the Solenoid ..................................................................16

Remove and Replace the Solenoid ..............................................16

Test the Motor Pump ................................................................17

Headrest Adjustments ...............................................................18

Chair Speed Adjustments ........................................................... 19

PROGRAMMING ...................................................20

Chair Positions........................................................................21

Chair Preset Buttons ................................................................21

Program Chair Preset Buttons ...................................................21

X-Ray/Rinse Button Feature .......................................................22

Dental Light ..........................................................................22

Auto Light Feature ................................................................22

Cuspidor Cupll and Bowl Rinse ...................................................23

Standard Cuspidor (no touchpad) ...............................................23

Cuspidor with Optional Touchpad ...............................................23

Customize Cupll and Bowl Rinse Functions ..................................23

DELIVERY SYSTEM ...............................................24

Delivery System Product Overview ...............................24

A-dec Tubing ..........................................................................25

Delivery System Service, Maintenance, and Adjustments ....26

Flexarm Adjustments ................................................................27

Holder Adjustments .................................................................28

Adjust the Doctor’s Holder ....................................................... 28

Adjust the Handle .................................................................28

Control Block .........................................................................29

Remove the Control Block ........................................................29

Handpiece Control Adjustments ................................................... 30

Adjust the Water Coolant ........................................................30

Adjust the Air Coolant ............................................................30

Adjust the Drive Air Pressure .................................................... 31

Oil Collector ..........................................................................32

Handpiece Tubing Replacement ...................................................33

Adjust Tubing Length .............................................................. 33

Quad Voltage Intraoral Light Source (QVIOLS) ..................................34

Intraoral Light Source Adjustments .............................................35

Intraoral Light Source Length and Voltage ....................................36

CUSPIDOR AND SUPPORT CENTER ............................37

Cuspidor and Support Center Product Overview ...............37

Cuspidor and Support Center Service, Maintenance, and

Adjustments ............................................................38

Adjust the Bowl Rinse Flow ........................................................38

Adjusting the Cuspidor Cupll and Bowl Rinse ................................38

Self-Contained Water System ......................................................38

Adjust the Water Bottle ..........................................................39

ASSISTANT'S INSTRUMENTATION ..............................40

Assistant's Instrumentation Product Overview .................40

Assistant's Instrumentation Service, Maintenance, and

Adjustments ............................................................41

Auto-air Holder.......................................................................41

Position the Assistant’s Holder ...................................................41

Assistant's Touchpad Connections ................................................. 42

Vacuum Instrumentation ............................................................42

Solids Collector ......................................................................43

UTILITIES ..........................................................44

Utilities Product Overview ..........................................45

Shutoff Valves ........................................................................ 45

Gauge and Pre-Regulator ......................................................... 46

Utilities Service, Maintenance, and Adjustments ..............47

Replace the Air and Water Filters .................................................47

DENTAL LIGHT ...................................................48

Dental Light Product Overview ....................................49

Dental Light Specications .........................................................49

On/Off Button ......................................................................49

Auto On/Off Feature .............................................................49

Dental Light Service, Maintenance, and Adjustments .........50

Circuit Breaker Location ............................................................51

Intensity Switches ...................................................................51

Dental Light Wire Connections on the 200 Dental Chair .......................52

Dental Light Wire Connections on the 200 Dental Chair .......................53

Dental Light Relay Circuit Board ..................................................54

LED Identication ..................................................................54

Flexarm Adjustments ................................................................55

A-dec 200 Dental Light Rotation Adjustments ................................... 56

Adjust Diagonal Rotation .........................................................56

Adjustment Vertical Rotation .................................................... 56

Replace the Dental Light Bulb .....................................................57

TROUBLESHOOTING .............................................58

Dental Chair ............................................................58

Delivery Systems ......................................................64

Holders ..................................................................67

Utilities ..................................................................67

Cuspidor ................................................................68

Dental Light ............................................................71

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A-dec 200 Service Guide Introduction | 4

Introduction

This guide provides service information for the A-dec 200 dental system, including the chair, programming, delivery system, cuspidor and support center, assistant’s instrumentation, utilities, and dental light. Users of this guide should understand basic operation and maintenance of dental and medical equipment.

CAUTION Possible injury or equipment damage. Service to be

performed by trained personnel only.

Get Support

For questions not addressed in this document, contact A-dec Customer Service using contact information for your region.

International Customer Service

2601 Crestview Drive Newberg, Oregon 97132 Telephone: 1 (50) 538-9471 or 1 (503) 538-7478 Fax: (503) 538-5911 Internet: www.a-dec.com

Other Sources of Information

Service Reference

This document is a companion to the A-dec 200 Service Reference (p/n

86.0324.00). The Service Reference contains illustrated parts breakdown content. Circuit board components and flow diagrams are available in both the Service Guide and the Service Reference.

A-dec 200 System Map

A-dec 200’s basic system comes configured as shown below:

Cuspidor (page 37)

Assistant’s Instrumentation (page 40)

Dental Chair (page 8)

Support Center (page 37)

Dental Light (page 48)

Delivery System (page 24)

Touchpad (page 20)

Serial Number Location

Footswitch

Foot Control

86.0016.00 Rev C 5

Solids Collector (page 43)

Utilities (page 44)

A-dec 200 Service Guide Introduction | 6

Service Tools

This table lists the types of tools available from A-dec and their use in servicing A-dec 200 equipment:

T able 1. Recommended Tools

Tool Task Part Illustration Part Number

Drive air pressure gauge Adjust handpiece drive air pressure, 0-60 psi (4.13 bar). This gauge does not t the Borden

3-hole coupler

Hemostat • Troubleshoot or repairing a unit

• Stop air or water ow through tubing

Hex key set Service or install A-dec equipment (plastic case included)009.008.00

Loctite

O-ring tools Replace O-rings during quick eld repairs (ts the four smallest O-ring sizes)

Install threaded fasteners to prevent loosening 060.001.00 (Red 271)

50.0271.00

009.008.00

060.002.00 (Blue 242)

009.013.00

Panel mount gauge • Check air/water pressure

• Check inline pressure gauge for testing purposes

026.118.00

T able 1. Recommended Tools

Tool Task Part Illustration Part Number

A-dec Silicone lubricant Lubricate internal moving parts such as O-rings, oral evacuator valves, and bushings

CAUTION Use only A-dec Silicone lubricant or the O-rings may be damaged.

Sleeve tool Aid in secure 1/4" tubing sleeves and 1/8" uni-clamps

Snap ring tool Install and remove internal and external snap rings (ts all snap rings used in A-dec equipment)

Tubing stripper Separate extruded air and water lines in vinyl tubing

Umbilical stringer Route additional tubing or wiring through existing umbilical assemblies (12’ [3.66 meter] stringer

with threading holes on both ends)

Valve test syringe Test pilot operated valves; used to apply a static pressure of 5-75 psi (.34-5.17 bar)

98.0090.01

98.0072.00

009.007.00

009.035.00

009.015.00

98.0050.01

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A-dec 200 Service Guide Dental Chair | 8

Dental Chair

This section provides detailed information related to service, maintenance, and adjustment of the A-dec 200 dental chair.

Contents

• Dental Chair Product Overview, page 9

• Dental Chair Service, Maintenance, and Adjustments, page 11

Figure 1. A-dec 200 Dental Chair

Dental Chair Product Overview

Power and Status

The chair and system are controlled by the master toggle on the delivery system. The power should always be turned off for service. When the A-dec logo on the touchpad or the status light on the chair lift arm are illuminated, the system is on and ready for use. If the status light blinks, the limit switch has been activated.

Figure 2. Power and Status

Master Toggle (Power On/Off)

Status Light

Limit Switch and Chair Lockout

If anything becomes lodged under the chair lift arm or assistant's arm, a limit switch stops the downward motion of the chair. Pressing the chair stop plate or lifting up on the assistant’s arm activates the limit switches. Use the footswitch or touchpad to raise the chair, then remove the object.

The optional lockout kit inhibits the operation of the dental chair when a handpiece is removed from its holder and the foot control pressed. When this happens, the chair status light blinks quickly. To resume, replace the handpiece and use the footswitch or touchpad to move the chair.

Figure 3. Chair Lockout Overview

Assistant’s Arm

Chair Lift Arm

Status Light

Chair Stop Plate

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A-dec 200 Service Guide Dental Chair | 10

Circuit Board Components

T able 2. LED Identication

LED Status Description

DS16 - AC POWER Off No 24 VAC power, tripped circuit breaker, power

supply turned off, no line voltage

Green, steady 24 VAC at the terminal strip

DS15 - STATUS Off System is not functioning, no power or circuit

board has failed

Green, steady Normal operation

DS17 - DATA Off No DCS communication, not connected to the

DCS, or DCS has failed

Green, steady Detects active DCS

Green, blinking Valid DCS Message

DS6 STOP PLATE LIMIT SWITCH

DS4 - CHAIR LOCKOUT Off Open, (normal)

DS3 Base and DS5 Back-

Position sensors

DS7, DS13, DS12, DS14

- Chair relay LEDs

DS8 - Cuspidor Limit Switch

DS9 - Back and DS10 Base - Limit switch

DS11 - Pump Motor Relay Off Pump motor relay is off (inactive)

DS1, DS2 UP A switch in UP is on (active)

Off Closed, (normal)

Red Open, (activated)

Red Closed, (activated)

Off Position sensor is idle

Yellow, steady Position sensor is moving correctly

Yellow, fast blink Upper end of travel

Off Relay is off

On Relay is on

Off Limit switch is off (inactive)

Yellow, steady Limit switch is on (active) (Hard wired or via DCS)

Off Limit switch is off (inactive)

Yellow, steady Limit switch is on (active)

Yellow, steady Pump motor relay is on (active)

DN A switch in the DN position is off (inactive)

Figure 4. Chair Circuit Board Components

DS8

DS16

DS3

Factory Default

DS5

DS6 DS9 DS10

DS2 DS1

DS4

CAUTION: Circuit boards are sensitive to static electricity.

Electrostatic Discharge (ESD) precautions are required when touching a circuit board or making connections to or from the circuit board. Circuit boards should be installed only by an electrician or qualified service person.

DS15

DS17

DS12

DS14

DS7

DS13

DS11

Dental Chair Service, Maintenance, and Adjustments

Contents

• Remove Upholstery and Covers, page 11

• Factory Default Routine, page 12

• Potentiometers, page 13

• Hydraulic System, page 15

• Solenoids, page 16

• Test the Motor Pump, page 17

• Headrest Adjustments, page 18

• Chair Speed Adjustments, page 19

Remove Upholstery and Covers

1. Remove the headrest from the chair back.

2. Remove the back cover screws that mount it to the back and back armature,

and remove the back cover.

3. Remove the two screws that secure the armature to the chair back pan and

remove the back upholstery and armature.

4. Remove the two ball pins from underneath the seat at the rear to remove the

seat upholstery.

Figure 5. Remove Chair Upholstery and Back Cover

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A-dec 200 Service Guide Dental Chair | 12

Factory Default Routine

When a new circuit board is installed in the chair, factory default routine needs to be run to learn the range of motion of the chair. The routine:

• Sets the base and back upper limits

• Calculates new presets based on actual range of motion of the chair

• Veries that the potentiometers work

To start the factory default routine, place the spare jumper in the factory default position on the P17 test points of the chair circuit board (see “Circuit Board Components” on page 10 for reference).

When running the factory default routine the chair:

1. Moves base down

2. Moves base up

3. Moves back down

4. Moves back up

5. Moves base and back to Position 0

6. Successful factory default beeps three times/failed factory default beeps one

time.

NOTE The jumper must remain in the factory default position

to complete the factory default routine. The status LEDs on the touchpad and the chair circuit board double blink while the factory default routine is running and after the routine is complete.

Potentiometers

Potentiometers provide the controller with the chair base and back position values. The controller saves the chair values with current position values for the pre-position and auto-return functions.

Adjust the Base Up Limit Switch:

1. Remove the motor pump cover.

2. Loosen the two screws clamping the limit switch to the mounting bracket.

Figure 6. Mounting Bracket

3. Position the chair as shown in Figure 7.

Figure 7. Chair Position

Limit Switch

Clamping Screws

Switch Arm

Actuator Pin

Mounting

Bracket

23”

58.42 cm

4. Push the limit switch against the actuator on the drive gear until the switch

opens (clicks), then tighten the clamping screws.

5. Position the chair base down until the limit switch has closed, then position

the chair full base up. Check the distance between the top of the base plate to

the at area around the threaded stud the chair adapter mounts to. If the

distance is incorrect, repeat steps 2 through 4.

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A-dec 200 Service Guide Dental Chair | 14

Adjust the Base Positioning Potentiometer

1. Remove the motor pump cover and position the chair base down.

2. Use a 3/16" hex key to remove the limit switch and potentiometer assembly

mounting screw.

3. Turn the potentiometer gear counterclockwise until it stops.

4. Align the potentiometer assembly, then turn the potentiometer gear

clockwise two teeth.

5. Reinstall the limit switch and potentiometer assembly. Make sure the

potentiometer gear does not turn and the two gears mesh properly.

6. Ensure that the electrical connections to the limit switch and positioning

potentiometer are property set.

7. While observing the two gears for binding, lower the chair base.

CAUTION Do not raise to the full base up position until after you have checked the base up limit switch for proper adjustment. The chair may go into hydraulic lock if not adjusted properly.

8. Reinstall the cover, and program the auto-positioning functions.

Figure 8. Base Potentiometer

Adjust the Back Potentiometer

1. Position the chair back to its full up position.

2. Disconnect the limit switch wiring harness from the limit switch.

3. Remove the limit switch mounting screws and limit switch from the bracket.

Do not bend the switch arm.

4. Remove the bracket mounting screws.

5. Remove the drive shaft from the potentiometer shaft.

6. Remove the drive shaft from the chair by moving it toward the chair

backrest, and slightly to the side to dislodge it from the holder.

Figure 9. Remove Drive Shaft

Limit Switch Mounting Screws

Bracket Mounting

Screws

Tip

Switch Arm

Drive Shaft

Urethane Tubing 3/8” OD

Potentiometer Shaft

Potentiometer Gear

Positioning Potentiometer

Limit Switch

Mounting Screw

Large Drive Gear

7. Turn the potentiometer shaft clockwise until it no longer turns, then turn the

shaft counterclockwise 1/8" of a turn.

Figure 10. Adjust Back Potentiometer

Potentiometer Shaft

Counterclockwise

Clockwise

8. Reinstall the shaft.

Hydraulic System

The hydraulic system consists of:

• Hydraulic uid reservoir: The uid level in the reservoir can be seen through

the sides of the reservoir and is serviced via a top ll cap.

• Hydraulic cylinders: The hydraulic cylinders control the base lift and back functions. Springs and gravity retract the rod during base and back down functions.

• Motor-driven hydraulic pump: The hydraulic pump and the starter capacitor

supply hydraulic uid from the reservoir, under pressure, to the chair lift

and tilt hydraulic cylinders for back up and base up functions.

• Solenoid/manifold assembly: This assembly gates hydraulic uid to and from the two cylinders. Depending on the chair function called for, the controller selects which solenoid-actuated manifold valves are opened or closed. The solenoid/manifold assembly also includes four adjustable needle

valves used to restrict or divert the ow of hydraulic uid to and from the lift

and tilt cylinders. These valves provide the rate of travel adjustment for chair base and back movement.

Figure 11. Hydraulic System

Hydraulic Cylinders

Hydraulic Fluid Reservoir

Solenoid/Manifold Assembly

Motor Pump

NOTE If cable ties are present in the product and you need to

remove them for servicing, make sure to replace the ties after service is completed.

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A-dec 200 Service Guide Dental Chair | 16

Solenoids

Test the Solenoid

To test the magnetic pull of the solenoid hold the tip of screwdriver near a solenoid and activate the appropriate chair function. You should feel the tug of the magnetic field generated around the solenoid.

Figure 12. T est the Solenoid

Remove and Replace the Solenoid

1. Lower the chair base and back to the full down position. Remove the motor

pump cover, then unplug the chair.

WARNING The solenoid coils are powered by line voltage (100,

120, or 240 V). Failure to unplug the chair may result in serious

injury from electrical shock.

4. Use a at-tipped screwdriver, loosen and then remove the sleeve and poppet

from the manifold assembly.

WARNING To prevent the possibility of over-heating and

failure, replace the entire solenoid assembly.

5. Remove the O-ring from inside the manifold, and install a new O-ring. Wipe

any excess off from the manifold.

6. Install a new sleeve and poppet; tighten the poppet sleeve using a at-tipped

screwdriver.

7. Install a new coil on the plunger. Do not overtighten the retaining nut.

8. Strip approximately 1/4" of insulation from the wires cut in step 2, and

install a crimp-on butt-type connector on each wire.

9. On the new solenoid, cut the wiring to length allowing enough to reach the

crimped-on connectors. Strip approximately 1/4" of insulation from the wires and crimp each wire into a connector.

Figure 13. Remove and Replace Solenoid

Hydraulic Manifold

2. Use a pair of wire cutters, cut the wiring to the faulty solenoid at about mid

point between the solenoid and connector P10.

3. Use a 9/16" wrench, remove the solenoid retaining nut and slide the coil off

the poppet sleeve.

CAUTION Use caution when removing and replacing the coil. The poppet sleeve is easily bent. Even slight bending of the sleeve will result in the malfunction of the solenoid valve.

P10

O-ring

Poppet

Poppet Sleeve

Washer

Solenoid

ID Washer (Solenoid Specifications)

Test the Motor Pump

This test requires the use of a AC Current Probe.

• Clip the probe onto the red wire going to the motor pump.

• Use the footswitch or touchpad to raise the chair.

You should read 5 Amps (maximum) of current for 120 V motor pump, or 2.5 Amps (maximum) of current for 240 V motor pump.

Figure 14. T est Motor Pump

Red Wire

White Wire

Motor Pump

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A-dec 200 Service Guide Dental Chair | 18

Headrest Adjustments

Turn the locking knob clockwise to lock it into the desired position. Slide the headrest and glide bar up or down to adjust the height.

Figure 15. Headrest Adjustments

WARNING When the glidebar has reached its maximum

recommended working height, a warning will be visible on the patient’s side of the glide bar. Do not use the headrest in a position where this warning is visible.

Locking Knob

Glide Bar

Chair Speed Adjustments

The speed for moving the chair seat and back can be adjusted. Use a 3/32" hex key to adjust the chair base speed and back speed on the manifold.

Figure 16. Adjust Manifold for Chair Speed

Adjust chair

base speed.

Adjust chair back speed.

NOTE If cable ties are present in the product and you need to

remove them for servicing, make sure to replace the ties after service is completed.

86.0016.00 Rev C 19

A-dec 200 Service Guide Programming | 20

Programming

The A-dec 200 product offers the option of having a standard touchpad. The touchpad centralizes treatment room controls into one touch surface including the chair, light, cuspidor controls, and auxiliary equipment.

NOTE If a system has a touchpad, it ships with a circuit board

for the cuspidor and a dental light relay board. This allows for full functionality with the touchpad. If a system does not have a touchpad, the system ships with only a basic circuit board for the cuspidor.

Figure 17. T ouchpad or F ootswitch Progr amming

Touchpad

Footswitch

NOTE Touchpad symbols are proprietary to A-dec, Inc.

Chair Positions

Back Down

Chair Preset Buttons

Manual direction arrows on the footswitch or touchpad allow you to move the chair base up/down and back up/down. Programmable buttons are factory preset to automatically move the chair.

Figure 18. Chair Manual and Programmable P osition Buttons

Program Button

Treatment 1

Entry/Exit

Base Up

Back Down

Base Down

Treatment 2

X-ray/Rinse

Back Up

T able 3. Chair Preset Buttons

Footswitch/Touchpad Description and Action

Entry/Exit: Positions chair for patient entry/exit; also turns the dental light off.

Treatment 1: Positions the chair base and back down; also turns the dental light on.

Treatment 2: Positions the chair base down and back up; also turns the dental light on.

X-ray/Rinse: Moves the chair for either x-ray or rinse position. Press again to move the chair to the previous position; also turns the dental light off or back on.

Program Chair Preset Buttons

Use the program button to assign and save chair preset positions. To program the chair presets Entry/Exit, Treatment 1, and Treatment 2:

1. Move the chair to the desired position.

2. Press and release the Program button. One beep indicates programming

mode is ready.

Base Up

Program Button

Entry/Exit

Treatment 1

86.0016.00 Rev C 21

Back Up

Base Down

X-ray/Rinse

Treatment 2

3. Within ve seconds, press the button you want to program and you hear

three beeps conrming the button has been set.

A-dec 200 Service Guide Programming | 22

X-Ray/Rinse Button Feature

The x-ray/rinse button moves the chair and patient into an upright position for x-rays or cuspidor access. You can reprogram this button using the DIP

switch on the 200 Chair circuit board as follows:

1. Set DIP Switch 1 to OFF and Switch 2 to OFF for CUSP/RET.

Figure 19. DIP Switch on 200 Chair Circuit Board

2. Move the chair to the desired position.

3. Press and release the Program button on the touchpad or footswitch. One

beep indicates programming mode is ready.

4. Press the x-ray/rinse button. You hear three beeps conrming the program is

set.

IMPORTANT If you have further questions about programming

chair positions, contact your authorized A-dec dealer.

Dental Light

The dental light can be operated from the manual 3-position switch or the optional touchpad. The dental light is always off when the manual switch is in the center location. To turn the light on from the touchpad, press and hold the dental light button. Press and hold the button to turn the light off.

The dental light features two intensities: high and composite (low). systems without a touchpad, flip the 3-position switch to either side of center

to select the intensity. On the touchpad, press the light button to choose the

intensity.

touchpad flashes.

Figure 20. Dental Light Operation

Dental Light

Button

When the light is in the composite setting, the LED indicator on the

LED Indicator

Auto Light Feature

The optional auto light feature turns on the light when the chair back reaches a treatment position. Press

or and the dental light turns off.

For

To deactivate the auto light feature, press and hold time for three seconds. One beep confirms the auto light feature is off.

To re-activate the auto light feature, press and hold time for three seconds. Three beeps confirm the dental light auto feature is on.

and at the same

Cuspidor Cupfill and Bowl Rinse

The cuspidor cupfill and bowl rinse functions depend on your system's configuration.

Standard Cuspidor (no touchpad)

Press and hold the cupfill button on the cuspidor for the desired amount of water. Water will continue to flow until the button is released.

Press the bowl rinse button on the cuspidor once for a 15 second rinse. For continuous rinse, hold the button down. When the button is released, the water will continue to flow for 15 additional seconds.

Cuspidor with Optional Touchpad

If your system includes a touchpad, you can use the buttons on the touchpad or the cuspidor to operate and program bowl rinse and cupfill functions:

T able 4. Cupll and Bowl Rinse Functions

Button Description

Cupll Button:

• Press the Cupll button for a timed operation. The factory preset is a 2.5 second ll.

• Press and hold the Cupll button for manual operation.

• Bowl Rinse Button:

• Press the Bowl Rinse button for a timed operation. The factory preset is a 30 second rinse.

• Press and hold the Bowl Rinse button for manual operation.

Customize Cupfill and Bowl Rinse Functions

Perform this operation with the doctor’s touchpad only.

1. Press

buttons on the cuspidor. Release them when you hear one beep.

2. Press and hold the Cupll (

amount of time.

3. Release the button. Three beeps conrm the setting.

Figure 21. Cuspidor Tower Cupll and Bowl Rinse Buttons

on the touchpad or press and hold both the cupll and bowl rinse

) or Bowl Rinse ( ) button for the desired

TIP Press twice in less than two seconds to activate the

continuous operation mode. Press the button once to end the continuous bowl rinse mode.

Bowl Rinse Button

Cupfill

Button

86.0016.00 Rev C 23

A-dec 200 Service Guide Delivery System | 24

Delivery System

This section provides information related to service, maintenance, and adjustments of the A-dec 200 delivery system.

Contents

• Delivery System Product Overview, page 24

• Delivery System Service, Maintenance, and Adjustments, page 26

Delivery System Product Overview

A-dec 200 delivery system has been designed to mount on the A-dec 200 Support Center. The support center mounts to the chair using a post mount. The A-dec 200 delivery system provides the air and water used to operate the handpieces, syringes and accessories, and electrical power and data control of other modules.

The A-dec 200 standard configuration has a balanced flexarm with manual brake, three handpiece control block positions, a control head with room to house integrated accessories, and an autoclavable syringe.

Figure 22. A-dec 200 Delivery System

A-dec Tubing

A-dec products use four sizes of outside diameter tubing: 1/8", 1/4", 5/16", and 3/8". The A-dec 200 delivery system uses standard A-dec tubing and vinyl handpiece tubing. See “Handpiece Tubing Replacement” on page 33 for instructions on replacing tubing.

T able 5. A-dec Handpiece Tubing Cross Reference Table

Color Function

Clear Drive air

Blue Water coolant

Yellow Air coolant

Figure 23. A-dec Handpiece Tubing Identication

(Exhaust - to Oil Collector)

Air Coolant Tubing (Yellow)

Water Coolant Tubing

(Blue)

Drive Air Tubing (Clear)

The handpiece tubing connects to the control block using tubing connectors and the appropriate A-dec tubing.

Figure 24. Vinyl Handpiece T ubing Control Block Connections

Water Coolant

Drive Air (ribbed)

Air Coolant

Exhaust Air

Air Coolant

Water Coolant

(Tubing From Holder)

Drive Air

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A-dec 200 Service Guide Delivery System | 26

Delivery System Service, Maintenance, and Adjustments

Contents

• Flexarm Adjustments, page 27

• Holder Adjustments, page 28

• Control Block, page 29

• Handpiece Control Adjustments, page 30

• Oil Collector, page 32

• Handpiece Tubing Replacement, page 33

• Quad Voltage Intraoral Light Source (QVIOLS), page 34

• Intraoral Light Source Length and Voltage, page 36

Flexarm Adjustments

• Tension: If the control head exarm drifts right or left, use a 3/32" hex key to adjust the tension setscrew. Turn the screw clockwise to tighten or counterclockwise to loosen the tension.

• Height: Turn the knob counterclockwise to disengage the control head

exarm brake and adjust the height. Turn the knob clockwise to lock the

position.

Figure 25. Flexarm Adjustments

Control Head Flexarm Height Adjustment Knob

Tension Adjustment Setscrew

Adjust Control Head Drift

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A-dec 200 Service Guide Delivery System | 28

Holder Adjustments

Adjust the Doctor’s Holder

Rotate the holders independently. Pull the holder slightly away from the adjacent one, rotate to the desired position, then release.

CAUTION Twisting the holder without pulling it away from the adjacent one will damage the mechanism.

Figure 26. Doctor’s Holder Adjustment

Adjust the Handle

To position the handle, remove the screw at the end of the handle, adjust the handle for use, then replace and tighten the screw.

Figure 27. Handle Adjustment

Screw

Control Block

The control block might need to be removed to service the control head. For example, you may need to remove the control block to change a diaphragm, to change the cartridge, or to service O-rings.

Remove the Control Block

1. Remove the cover.

2. Loosen the two screws that secure the control block to the control delivery

system frame.

3. Lift the control block up from the base of the control center.

Figure 28. Remove Control T op

Figure 29. Remove Control Block on Delivery Systems

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A-dec 200 Service Guide Delivery System | 30

Handpiece Control Adjustments

Adjust the Water Coolant

1. Turn the air coolant, water coolant, and drive air all the way down.

2. Lift a handpiece from the holder, and ip the wet/dry toggle to water

(towards the blue dot).

3. Step on the foot control.

4. Adjust the water coolant ow until there is 1 drop every 2 seconds.

Figure 30. Adjust Water Coolant

Air (Gray) and Water (Blue)

Coolant Keys

Drive Air Key

Adjust the Air Coolant

1. Lift a handpiece from the holder, and step on the foot control.

2. Adjust the air coolant ow until the spray is a ne mist.

Figure 31. Adjust Air Coolant

Air (Gray) Coolant Key

Foot Control Wet/Dry Toggle

Foot Control

NOTE Contact A-dec Customer Support for information on servicing

the foot control or syringe. See “Get Support” on page 4.

Adjust the Drive Air Pressure

NOTE Use a handpiece pressure gauge attached to the handpiece

tubing for exact drive air measurement. See the manufacturer’s

handpiece documentation for the drive air pressure specication.

Figure 32. Adjust Drive Air Pressure

1. Lift a handpiece from the holder.

2. Install a pressure gauge.

3. Flip the toggle to dry, and step on the foot control.

4. Adjust the drive air pressure according to manufacturer’s recommendations.

◦ To increase ow, turn the key counterclockwise.

◦ To decrease ow, turn the key clockwise.

Drive Air Key

Pressure Gauge

Toggle and Foot Control

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A-dec 200 Service Guide Delivery System | 32

Oil Collector

The oil collector needs to be serviced once a week for normal use and more often for heavier use. To service:

1. Unsnap the oil collector cover located under the control head and discard the

old gauze.

CAUTION Do not remove the foam pad located inside the oil

collector cover.

Figure 33. Oil Collector Removal

2. Fold a new gauze pad (51 mm x 51 mm [2" x 2"]) into quarters and place

inside the cover.

3. Snap the oil collector cover closed.

Handpiece Tubing Replacement

1. Remove the delivery system cover.

2. Cut the handpiece tubing you are replacing from the colored A-dec tubing/

control block.

3. Pull the old handpiece tubing out of the control head.

4. Route the new handpiece tubing through the base of the control head.

5. Connect the new handpiece tubing to the control block using the connectors

and colored tubing previously used.

The A-dec colored tubing is identified by its color.

• Yellow tubing to the air coolant port

• Blue tubing to the water coolant port

• Clear tubing to the drive air port

NOTE Vinyl tubing is not color coded. For vinyl tubing

identification, see “A-dec Tubing” on page 25.

6. Replace the delivery system cover.

Adjust Tubing Length

1. Adjust the length of the tubing so it drapes with syringe tubing.

2. Insert the tubing in the tubing retainers.

Figure 35. Adjust Length of Handpiece T ubing

Figure 34. Handpiece Barb Connection

Handpiece #3

Water Coolant

Air Coolant

Drive Air

86.0016.00 Rev C 33

Handpiece #2

Handpiece #1

A-dec 200 Service Guide Delivery System | 34

Quad Voltage Intraoral Light Source (QVIOLS)

Part Number: 90.1168.00

The quad voltage intraoral light source (QVIOLS) provides four independent fiber optic voltage outputs. Each output is adjustable from 3 VDC to 7 VDC at 1.5 Amps. Only one output can be on at a time. Activating an input on the QVIOLS turns on its respective output.

T able 6. QVIOLS Circuit Board Descriptions

Item Description

1 DS1 AC Power LED

2 DS2 Status LED

3 DS3 Data LED

4 J1 - 24 VAC Input

5 J1 - 0 VAC Input

6 DS4 - normally closed LED (displays as yellow when P2 jumper is installed) 7 P1 Data Port

8 J3 Switch input Common

9 J3 Switch Input #1

10 J2 Switch Input #2

11 J2 Switch Input #3

12 J2 Switch Input #4

13 J4 Light Source Output #1

14 J4 Light Source Output #2

15 J5 Light Source Output #3

16 J5 Light Source Output #4

17 S1 Decrease Lamp Output

18 S2 Increase Lamp Output

19 P2 normally closed jumper

Figure 36. QVIOLS Circuit Board

NOTE On the A-dec 200 product, a jumper should always be

located within P2, and DS4 should be on.

Intraoral Light Source Adjustments

The intraoral light source (IOLS) voltage adjustment on the A-dec 200 doctor’s delivery system is located on the QVIOLS circuit board. Each output voltage is preset to 3.2 VDC at the lamp terminals when the lamp is on.

WARNING The Length and Voltage Table, page 36, is only

valid for devices rated for 3.5 VDC and 0.75 Amp 26 AWG wires. For devices drawing a different amount of current, requiring a different voltage, or with a different wire gauge, please contact A-dec Customer Service. See “Get Support” on page 4.

1. Use a 7/64" hex key to remove the control head cover.

2. Set the voltmeter to DC voltage and place its probes on the IOLS output

terminals for the handpiece you are testing.

3. Lift the handpiece from its holder.

NOTE When the intraoral light source output is on, its

respective LED is illuminated. For example, LED DS6 is illuminated when handpiece #2’s intraoral light source is activated.

4. Use the buttons behind the terminal to adjust the voltage according to the

Length and Voltage Table, page 36.

Figure 37. Intraoral Light Source V oltage

Decrease and Increase

Buttons

Intraoral Light Source Outputs

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A-dec 200 Service Guide Delivery System | 36

Intraoral Light Source Length and Voltage

T able 7. Length and V oltage T able

Length and Voltage

Voltage at terminal strip

Wire length in

A-dec tubing

(in) (cm) VDC +/- .02 (in) (cm) VDC +/- .02

48 122 3.40 108 274 3.69

54 137 3.43 114 290 3.72

60 152 3.46 120 305 3.75

66 168 3.49 126 320 3.78

72 183 3.52 132 335 3.81

78 198 3.55 138 351 3.84

84 213 3.58 144 366 3.87

90 229 3.61 150 381 3.90

96 244 3.64 156 396 3.93

102 259 3.67

A-dec/W&H, Bien Air or other bulbs rated at 3.5

Wire length in

A-dec tubing

Voltage at terminal strip

A-dec/W&H, Bien Air or other bulbs

rated at 3.5 V

NOTE The above table pertains to fiber-optics powered with 26 AWG wires, 0.75 Amp loads, and a desired bulb voltage of 3.2 VDC. For fiber-

optics powered with 26 AWG wires and other ratings, use the equation:

T = (Z x 0.006 x Y) + X where:

T: Terminal strip voltage(VDC) X: Desired voltage at lamp (VDC) Y: Rated lamp/load current (in Amps) Z: Length of 26 AWG wire (inches) from terminal trip to lamp

Cuspidor and Support Center

This section provides detailed information related to service, maintenance, and adjustment of the A-dec 200 cuspidor and support center.

Contents

• Cuspidor and Support Center Product Overview, page 37

• Cuspidor and Support Center Service, Maintenance, and Adjustments, page 37

Cuspidor and Support Center Product Overview

A-dec 200 Support Center provides chair side mounting of the A-dec 200 Delivery System, Cuspidor, A-dec 200 Dental Light, and Assistant’s Instrumentation. The support center mounts to the A-dec 200 chair using a post mount.

Figure 38. A-dec 200 Support Center with Cuspidor

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A-dec 200 Service Guide Cuspidor and Support Center | 38

Cuspidor and Support Center Service, Maintenance, and Adjustments

Adjust the Bowl Rinse Flow

Adjustments to the cuspidor bowl rinse flow are made inside the support center. To adjust the flow:

1. Loosen the two thumb screws at the bottom of the support center and

carefully pull the cover out.

2. With the cuspidor bowl rinse on, tighten or loosen the pinch valve to adjust

the ow.

3. For the best rinsing action, adjust the ow pattern by rotating the bowl rinse.

Figure 39. Pinch Valve Adjustment

Bowl Rinse Flow

Pinch Valve

Support Center Cover

Self-Contained Water System

The self-contained water system provides water to the handpieces, syringes, and cuspidor cupfill. The system includes a 2 liter water bottle that mounts to the support center and offers a way to ensure the quality of treatment water.

WARNING Use only A-dec self-contained water bottles. Do not use

any other bottles, including glass or plastic beverage bottles. Do not use damaged bottles. These can pose a serious safety hazard while pressurized. A-dec plastic water bottles cannot withstand heat sterilization. Attempting to do so will damage the bottle and your sterilizer.

CAUTION Use caution when using the self-contained water system

with accessories that require and uninterrupted water supply (such as scalers) as these could get damaged without a continuous water source. Do not use saline solutions, mouth rinses, or any chemical

solutions (not specied in this guide) in your A-dec self-contained

water system. These may damage the system components and cause your dental unit to fail.

Figure 40. Self-Contained Water Bottle

Adjusting the Cuspidor Cupfill and Bowl Rinse

For adjustment information, see “Cuspidor Cupfill and Bowl Rinse” on page

23.

Adjust the Water Bottle

To remove the bottle: Turn the bottle counterclockwise.

To install the bottle: Turn the bottle so that the A-dec logo faces away from the chair, then rotate the bottle to the right 1-1/2 turns, taking care not to overtighten.

CAUTION Do not over tighten the water bottle or you can strip its

threads. It is normal to hear a hissing sound for up to two minutes while the bottle pressurizes.

86.0016.00 Rev C 39

A-dec 200 Service Guide Assistant's Instrumentation | 40

Assistant's Instrumentation

This section provides detailed information related to service, maintenance, and adjustment of the A-dec assistant’s instrumentation.

Contents

• Assistant’s Instrumentation Product Overview, page 40

• Assistant’s Instrumentation Service, Maintenance, and Adjustments, page 41

Assistant's Instrumentation Product Overview

The A-dec 200 assistant’s instrumentation is equipped with an autoclavable syringe, high volume evacuator (HVE), and saliva ejector (SE). Some configurations may include an optional dual HVE or instrumentation that supports a chair-side or single-operatory vacuum system. Integrated into the support center is the solids collector, which connects with the HVE and SE to separate solids from the evacuated material.

The assistant’s vacuum instruments disconnect from the tubing for easy cleaning, and they are fully autoclavable.

Figure 41. Assistant’s Instrumentation

HVE

Assistant's Instrumentation Service, Maintenance, and Adjustments

Auto-air Holder

Each handpiece in the holder assembly automatically activates when you lift it from its holder.

Holders provide vacuum On/Off switching for users whose vacuum system requires this functionality. The vacuum pump activates automatically when you lift the HVE or SE from the holder. The vacuum turns off when you place the HVE or SE back into the holder.

Figure 42. Auto-Air Holder

Position the Assistant’s Holder

The independently adjustable holders rotate to allow customized positioning for each instrument on the assembly.

To rotate the holder:

1. Pull holder slightly away from the adjacent one.

2. Rotate to the desired position and release.

Figure 43. Rotating Instrument Holders

NOTE Auto-air holders rotate together. Standard holders rotate

individually.

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A-dec 200 Service Guide Assistant's Instrumentation | 42

Assistant's Touchpad Connections

The assistant's instrumentation uses a standard touchpad that serves as a single touch surface for controlling the chair, dental light, and cuspidor. The touchpad can rotate 340° for access and visibility.

Figure 44. Assistant’s Touchpad with Standard Holder Connections

24 VAC

Data Line

Vacuum Instrumentation

To use the HVE and SE, lift the holder from the valve to activate the vacuum.

NOTE Lifting the handpiece from the holder only activates the

vacuum with auto-air switches.

Figure 45. HVE and SE Operation

Solids Collector

The solids collector helps stop solids from entering the central vacuum system.

CAUTION Use appropriate gloves when handling contaminated

parts.

Replace Solids Collector Screen

1. Turn off vacuum or open the HVE control valve.

2. Remove the solids collector cap.

3. Remove the solids collector screen.

4. Discard the screen according to your local regulations.

CAUTION Do not empty the screen into the cuspidor. Doing so could

plug the drain.

5. Insert the new screen in the collector and replace the cap.

CAUTION Ensure that the solids collector cap is inserted properly.

Failure to do so will not allow for proper suction.

Figure 46. Replace Solids Collector Screen

86.0016.00 Rev C 43

A-dec 200 Service Guide Utilities | 44

Utilities

This section provides detailed information related to service, maintenance, and adjustment of the A-dec 200 utility area.

Contents

• Utilities Product Overview, page 45

• Utilities Service, Maintenance, and Adjustments, page 47

Figure 47. Utilities on A-dec 200 Dental Chair

Utilities Product Overview

The utilities for your system are located under the chair floor box. To access the utilities, pull the floor box cover up at the front posts, and then forward

and up to slide the cover off the back posts.

Shutoff Valves

Manual shutoff valves control the air and water to the system. To prevent leaks, these valves should remain fully open (turned counterclockwise) except while servicing the system. Air and water pass through separate filters before entering the regulators. Replace these filters when they become clogged and cause restricted flow.

Figure 48. Floor box Cover Removal and Shutoff V alves

Floor Box Cover

Back Post

Front Post

Manual Shutoff

Valves

NOTE If cable ties are present in the product and you need to

remove them for servicing, make sure to replace the ties after service is completed.

86.0016.00 Rev C 45

A-dec 200 Service Guide Utilities | 46

Gauge and Pre-Regulator

The pre-regulator controls the air and water pressure in the unit. The gauge displays the unit air pressure.

Figure 49. Utilities Diagram

T able 8. Utilities Descriptions

Item Description Item Description

1 Moisture separator (optional) 7 Air exhaust

2 Cuspidor drain tube 8 5/8" exhaust tube

3 20 mm tube to drain 9 Durr adapter

4 Connector clips (four) 10 20 mm tube to liquid separator

drain

5 Liquid separator tank 11 Y connector

6 Cap 12 Exhaust tube

Utilities Service, Maintenance, and Adjustments

Replace the Air and Water Filters

Air and water pass through separate filters before entering the regulators. Replace a filter when it becomes clogged and causes restricted flow.

Figure 50. Air and Water the Filter Components

Filter Housing

O-ring

Filter

Beveled Edge

Manual Shut Off Valve

To replace the filter:

1. Turn off the master toggle and close the manual shutoff valves (turn

clockwise).

2. Bleed the system of air and water pressure by operating the syringe buttons

until air and water no longer ow.

3. Using a standard screwdriver, remove the lter housing from the air or water

lter pre-regulator assembly and remove the lter.

4. Replace the lter if it is clogged or discolored. Install the lter with the

beveled edge facing the manifold.

CAUTION To ensure proper delivery system operation, install the

lter with the beveled edge facing the manifold.

NOTE Turn the pre-regulator knob clockwise to increase pressure

and counterclockwise to decrease pressure. Read the pressure gauge while adjusting. Water pressure will increase/decrease by half of the gauge indication.

Figure 51. Replacing Filters

Filter Housing

Filter

Manual Air Shutoff Valve

Manual Water Shutoff Valve

Filter Housing

86.0016.00 Rev C 47

A-dec 200 Service Guide Dental Light | 48

Dental Light

This section provides detailed information related to service, maintenance, and adjustments of the A-dec 200 Dental Light.

Contents

• Dental Light Product Overview, page 49

• Dental Light Service, Maintenance, and Adjustments, page 50

Figure 52. A-dec 200 Dental Light

Figure 53. LED and A-dec 371 Dental Lights*

NOTE * If an A-dec LED or 371 Dental Light is used, refer to

the A-dec Dental Lights and Monitor Mounts Service Guide (p/n

86.0326.00) for service information.

Dental Light Product Overview

The dental light provides two intensities at the light head and the optional touchpad. On the light head switch, flip the switch to either side of center to select the intensity. On the touchpad, press the light button to choose the intensity.

Dental Light Specifications

• Electrical (Transformer Output):

◦ A-dec 200: 12.1/16/17 VAC

• Bulb: Quartz Xenon Halogen, single-end prongs, extended life

• Rating: 17 V/95 watts

• Color temperature: 4800 Kelvin

• Heat output: 325 BTU/Hour

• Light Pattern: 3.9" x 6.7" at 27.6" (100 mm x 170 mm at 700 mm)

• Nominal Light Intensity:

◦ Composite: 5,000 lux (465 fc)

◦ High 17,000 lux (1579 fc)

On/Off Button

Auto On/Off Feature

The optional auto on/off feature turns the light on when the chair back reaches a treatment position. Press

To activate/deactivate the auto on/off feature, press and hold the program and dental light buttons simultaneously for three seconds. One beep confirms the auto on/off is off. Three beeps confirm the auto on/off is on.

Figure 54. T ouchpad and F ootswitch Light F eatures

or , and the dental light turns off.

X-Ray /Rinse PositionEntry/Exit Position Treatment Positions

The dental light can be operated from the assistant’s or doctor’s touchpad. To turn the light on, off, or change intensity, press the dental light button on the touchpad.

86.0016.00 Rev C 49

A-dec 200 Service Guide Dental Light | 50

Dental Light Service, Maintenance, and Adjustments

Contents

• Circuit Breaker Location, page 51

• Intensity Switches, page 51

• Dental Light Wire Connections on the 200 Dental Chair, page 52

• Dental Light Relay Circuit Board, page 54

• A-dec 200 Dental Light Rotation Adjustments, page 56

• Replace the Dental Light Bulb, page 57

Circuit Breaker Location

A circuit breaker will interrupt the flow of electricity under abnormal conditions. If the circuit breaker should trip, inspect the wiring to ensure there are no shorts, and reset by pushing the circuit breaker. The circuit breaker for the dental light is located on the power supply.

Figure 55. Circuit Breaker

CB1

10 A M P

Intensity Switches

A-dec dental lights can be operated from the manual 3-way switch or the optional touchpad. The dental light is always off when the 2-way switch is in the center location. To turn the light on or off from the touchpad, press and hold the dental light button. The dental light features two intensities: high and composite (low). For systems without a touchpad, flip the 3-way switch either side of center to select the intensity. For systems with a touchpad, ensure that the 2-way switch is in either of the On positions, and press the light button to choose the intensity. When the light is in the composite setting, the LED indicator on the touchpad flashes.

Figure 56. Intensity Switches

LED Indicator

86.0016.00 Rev C 51

10 A M P

0 A M P

10 A M P

A-dec 200 Service Guide Dental Light | 52

Dental Light Wire Connections on the 200 Dental Chair

Terminal Voltage Terminal Label Wire

J2 17/12/16 VAC VIO Violet

J2 0 VAC BLK Black

See “Circuit Board Components” on page 10 to identify dental light connections on the chair circuit board.

NOTE The LED indicator must be connected to the power supply

for the dental light circuit board to function correctly.

Figure 57. Dental Light Wire Connections With Touchpad

Light Switch (If the switch is in the middle position, the light will not turn on by operating the touchpad.)

The green wire is cut back to the insulation.

NOTE For field installation of power supply, cut off the existing

white connector and strip the wires.

Dental Light

Circuit Breaker

300 W Power Supply 100 V (p/n 43.0290.00)

10 A M P

0 1

A M P

10 A M P

200 PS Power Cord

110 - 120 V (p/n 43.0291.00) 220 - 240 V (p/n 43.0292.00)

(To Chair Circuit Board)

Dental Light Wire Connections on the 200 Dental Chair

Figure 58. Dental Light Wire Connections Without Touchpad

Light Switch

Dental Light

Circuit Breaker

10 A M P

0 1

A M P

10 A M P

300 W Power Supply 100 V (p/n 43.0290.00) 110 - 120 V (p/n 43.0291.00) 220 - 240 V (p/n 43.0292.00)

(To Chair Circuit Board)

200 PS Power Cord

86.0016.00 Rev C 53

A-dec 200 Service Guide Dental Light | 54

Dental Light Relay Circuit Board

Figure 59. Dental Light Relay Circuit Board

T able 9. Dental Light Relay Circuit Board Descriptions

Item Description

1 DS1 - AC POWER

2 DS2- STATUS

3 DS3 - DATA

4 DS4 - RELAY

5 DS5 - RELAY

6 P1 - Input Power

7 P2 - DATA

8 J1 - Toggle Switch Inputs

T able 10. Dental Light Output Settings

Function K1 (DS4) K2 (DS5) Output

Off Off Off 0 VAC

High intensity On Off 17 VAC

Composite intensity Off On 12 VAC

Medium Intensity On On 16 VAC

LED Identification

T able 11. LED Status and Descriptions

LED Status Description

DS1 - AC POWER Off No 24 VAC power, tripped circuit breaker, power

supply turned off, no line voltage

Green, steady

DS2 - STATUS Off System is not functioning, no power or circuit

Green, steady

DS3 - DATA Off No DCS communication, not connected to the

Green, steady Green, blinking

DS4, DS5 - Dental Light Relay

Off, Off Dental light off

On, Off High intensity

Off, On Composite intensity

On, On Medium intensity

24 VAC at the terminal strip

board has failed

Normal operation

DCS, or DCS has failed

Detects active DCS

Valid DCS message

Flexarm Adjustments

Remove the screw and cover from the flexarm. Turn the tension adjustment nut inside the flexarm using a 1/2" open end wrench. Tighten the nut by turning it clockwise, if the flexarm moves too easily, or tends to drift down by itself. Loosen the nut by turning it counterclockwise, if the arm drifts up.

Figure 60. Dental Light Flexarm Adjustment

NOTE The weight of the ex arm cover affects the ex arm counter

balance. Set cover on ex arm to test tension adjustment.

If the dental light drifts up or down, complete the following steps to adjust the flexarm counterbalance.

1. Remove the exarm end caps.

2. Lift and separate the cover from the arm.

TIP To get a better grip on the cover, use a Phillips head

screw driver to remove the retainer on the end of the rigid arm towards the light and slide the cover toward the light.

3. Slide the cover up and rest it on the rigid arm.

4. Use a 1/2" combination wrench to adjust the nut on the end of the spring.

5. If the dental light drifts up, turn the nut to the left. If the dental light drifts

down, turn the nut to the right.

6. Slide the cover back onto the exarm (but do not reattach it yet), and check

for drift.

7. Repeat steps 3 through 5 until the drift is eliminated.

Cover

Rigid Arm

End Cap

Tighten

Adjustment Nut

Loosen

86.0016.00 Rev C 55

A-dec 200 Service Guide Dental Light | 56

A-dec 200 Dental Light Rotation Adjustments

If the light head is difficult to position, moves too easily, or tends to slip out of position, the rotation tension can be adjusted diagonally and vertically.

Adjust Diagonal Rotation

Use a 5/64" hex key to adjust the setscrew on the pivot housing. Turn the screw clockwise to increase tension; counterclockwise to decrease tension.

Figure 61. Diagonal Adjustment

Tension Adjustment Screw

Adjustment Vertical Rotation

1. Remove the yoke plug on one side of the light.

2. Using a 5/16" nut driver, turn the adjustment nut clockwise to increase

tension; counterclockwise to decrease tension.

3. Reinstall the yoke plug.

Figure 62. Vertical Adjustment

Tension Adjustment Nut

Yoke Plug

Replace the Dental Light Bulb

Outer Wrapper

Follow these steps when replacing the dental light bulb:

1. Turn the light off and allow it to cool.

WARNING To avoid burning your ngers, allow the bulb to cool

before removing. Never operate the dental light with the light shield removed. The clear shield contains UV blocking additives and is also your protection in the unlikely event that the bulb shatters.

2. Hold the light shield and gently squeeze one side while pulling the shield

away from the dental light. Set the light shield aside.

3. Using a gauze pad or cloth to protect your ngers, carefully pull the old bulb

from its socket. Discard the bulb.

4. Holding the new bulb in its outer wrapper, carefully insert the bulb pins into

the socket. A small section of each pin is still visible when the bulb is fully seated.

CAUTION Take care when handling the bulb. The bulb base is

fragile and can break under excessive pressure. Do not remove the outer wrapper when handling the new bulb. Finger oils can affect light performance and severely limit bulb life. If you should inadvertently touch the bulb, gently clean it with cotton dampened with isopropyl or ethyl alcohol.

Figure 63. Bulb Replacement

Light Shield

Light Shield Tab (hidden)

CAUTION Do not attempt to install the light shield if it has

a broken tab. Contact your authorized A-dec dealer for a replacement shield and install it before operating the light.

5. Remove and discard the outer wrapper, then reinstall the light shield.

6. Verify the operation of the light by turning it on and operating it at each

intensity setting.

86.0016.00 Rev C 57

New Bulb

A-dec 200 Service Guide Troubleshooting | 58

Troubleshooting

The troubleshooting tables contain tips and troubleshooting information to assist in diagnosing problems. This content is not intended to cover every situation, but includes the most common problems that you may encounter.

Dental Chair

Dental Chair Troubleshooting

Problem Possible Cause Action

Factory default test halts

during the Base Up test, and

the circuit board beeps one time

Chair base or back is stuck in full up position The limit switch is not activated, or Down solenoid poppet is unable to open based on excess hydraulic pressure

Factory default test halts during

the Back Down test, and the

circuit board beeps one time

Input voltage could be low or outside the required range.

Motor capacitor or

Base Up solenoid are defective

Potentiometer is not changing voltage.

Hydraulic lock has occurred Correct Hydraulic Lock

Verify that the input voltage and voltage selection resistors (100 - 120 VAC = R72) and R74 (220 - 240 VAC = R 73).

If Base limit switch is activated, verify switch operation.

If the motor thermal limiter is open, and the motor is hot, wait for the motor to cool off.

Replace the motor capacitor or Base Up solenoid.

Verify the potentiometer LED illuminates when the base is moving. Check the potentiometer mechanical drive and electrical connections.

1. Remove the motor/pump cover from the chair.

2. Fit a 5/8" open end wrench to the high pressure outlet port (either lift or tilt, whichever is in hydrostatic lock) of the

hydraulic manifold.

3. Wrap a rag around both the tting and the end of the wrench. The rag will absorb the small amount of uid vented

from the tting.

4. Carefully loosen the tting about one-half turn, counterclockwise, and re-tighten.

5. Cycle the chair a couple of times to verify it is no longer in hydraulic lock.

Stop plate limit switch is activated Verify switch operation

Stop plate is jammed Remove and reinstall the stop plate.

Back Down solenoid is defective Test the solenoid and replace if needed.

Back is in hydrostatic lock See Correct Hydraulic Lock, above.

Potentiometer is not changing voltage

Verify that the potentiometer LED is illuminated when the back is moving. Check the potentiometer mechanical drive and electrical connections.

Dental Chair Troubleshooting

Problem Possible Cause Action

Factory default test halts during

the Back Up test

Factory default test halts during

the Base Down test

Chair moves by itself when power is turned on

No power to chair or unit. Ofce

still has power.

Back up limit switch is activated Verify switch operation.

Back Up solenoid is defective Test solenoid and replace if needed.

Back is in hydrostatic lock See Correct Hydraulic Lock, page 58.

Potentiometer is not changing voltage.

Stop plate limit switch is activated Verify switch operation

Base Down solenoid is defective Test solenoid and replace if needed.

Base is in hydrostatic lock See Correct Hydraulic Lock, page 58.

Potentiometer is not changing voltage

The jumper is in FACT DEFAULT position

Short circuit in the touchpad or footswitch

Short circuit on the circuit board Replace the circuit board.

The chair is unplugged.

Verify potentiometer LED is illuminated when base is moving. Check potentiometer mechanical drive and electrical connections.

Verify that the potentiometer LED is illuminated when the back is moving. Check the potentiometer mechanical drive and electrical connections.

Verify that the jumper is in the SPARE position

Unplug the touchpad and footswitch; reset the circuit breaker. If the problem isn’t repeated, the touchpad or footswitch may have shorted.

1. Verify power is available at the outlet.

2. Plug chair in to power source.

The Mains on/off button is in the off position.

No power to chair or unit. Ofce

still has power.

86.0016.00 Rev C 59

Power supply circuit breakers CB1, CB2, CB3, CB4, CB5, or CB6 have

tripped.

Press the Mains On/Off button.

Refer to Circuit Board Components, page 10, for component identication. DS14 and DS15 on the chair circuit

board indicate that 24 VAC power is present for distributed power. The AC Power LED, DS1, on the chair board indicates 24 VAC is present for the chair board and back motor. If DS1, DS14, or DS15 are off, verify that the respective circuit breaker is not tripped and reset if it is tripped.

A-dec 200 Service Guide Troubleshooting | 60

Dental Chair Troubleshooting

Problem Possible Cause Action

No base up function. The motor

relay clicks. Base LED (DS11)

turns on. The chair back functions work.

No base down. Relay clicks and DS12 LED illuminates

Disconnected capacitor.

1. Verify the base up relay clicks and the LED (DS11) on the chair circuit board is illuminated.

2. Turn power off if connected.

3. Check capacitor connections.

4. Reconnect cables.

WARNING The hydraulic system must be depressurized before removing the solenoid.

To depressurize the hydraulic system, remove the failed solenoid coil and replace with the operating solenoid coil. Lower the chair base and back.

NOTE When replacing a solenoid, wipe up any oil, and replace existing O-rings on the

solenoid base.

Chair base thermal limiter has been tripped.

Chair base motor is disconnected. Verify the motor is connected into the base motor connection (P11 on the circuit board). When base up is activated,

Failed capacitor. Replace the capacitor with one of correct voltage.

Failed base down solenoid coil.

The chair base motor should be limited to a 5 percent duty cycle. If the duty cycle is exceeded for a period of time, a thermal limiter will trip. The thermal limiter is located inside the base pump motor and will auto-reset after a few minutes.

the base motor relay should click and DS11 should be on. Verify that P12 is connected to the chair board (mains power from the power supply).

1. Check for magnetic pull while operating base down function.

2. Check for correct resistance value at solenoid connector:

38 Ohms (Ω) ± 4 Ohms (Ω).

3. Replace solenoid.

WARNING The hydraulic system must be depressurized before removing the solenoid.

To depressurize the hydraulic system, remove the failed solenoid coil and replace with the operating solenoid coil. Lower the chair base and back.

NOTE When replacing a solenoid, wipe up any oil, and replace existing O-rings on the

solenoid base.

Dental Chair Troubleshooting

Problem Possible Cause Action

Base or back moves up for only

one second, no preset buttons work (limp-along feature) DS5 (back) not illuminated DS6 (base) not illuminated

No chair movement from a touchpad, and the touchpad status A-dec logo icon and chair circuit board status LED (DS2) are illuminated, and the footswitch operates the chair

No chair movement from the touchpad, status icon is not illuminated

Base up or Base down does not

travel the full distance

Back does not move but base

moves as normal

The position sensor for that movement is disconnected.

1. Check position sensor connections to the chair circuit board.

2. Reconnect if disconnected.

3. Verify that the position sensor is connected correctly: Back position sensor into P1, base into P2.

Failed position sensor.

1. Verify that the board’s yellow LED is on. If not, make sure the board is connected.

2. Replace the position sensor as a complete assembly.

Touchpad DCS is interrupted. • Connect a known good data line between the touchpad and the chair circuit board.

• If the chair circuit board data LED comes on and the chair operates normally with the touchpad, check each data line in the system with the known good line until the bad DCS line is found.

• If the chair circuit board data LED stays off, call customer service. See “Get Support” on page 4.

NOTE The data and power to the control head mounted touchpad are routed via the

control head. Power is supplied using black/gray wires.

Faulty touchpad. If the LED, DS1 on the touchpad is on, and DS2 (blue status LED) is off, cycle power to the board. If DS1 remains

illuminated and DS2 is off, replace the touchpad. If at any time the DS2 is on, do not replace the touchpad.

Faulty touchpad power cable or wires.

Position sensor connections (P1 and P2) on the chair circuit board are switched.

Chair back motor is disconnected. Verify that the motor is connected into the BACK MOTOR connection (P8 on the circuit board).

If the LED, DS1 on the touchpad is off, verify wires to the touchpad are connected to the WAGOs in the delivery system. Verify 24 VAC at the WAGOs. If 24 VAC is not present at the WAGOs in the delivery system, verify wiring to and from the post box and chair board. Verify that the circuit breaker is not tripped.

Verify that the position sensors are connected to correct chair circuit board locations:

P1 — Back position sensor P2 — Base position sensor

NOTE When back up is activated, DS9 and DS17 should be on. When back down is

activated, DS10 and DS17 should be on.

Back up and base down

movements do not move, and back down and base up movements move as normal

86.0016.00 Rev C 61

Jumper not installed on cuspidor circuit board limit switch jumper.

Place and leave a jumper into the cuspidor circuit board limit switch connector, P4.

A-dec 200 Service Guide Troubleshooting | 62

Dental Chair Troubleshooting

Problem Possible Cause Action

No chair movements Power may not be present on the

circuit board.

Unable to change or use chair presets

No or limited chair functions from footswitch

Position sensor connections (P1 and P2) on the chair circuit board are switched.

Position sensor for that movement is disconnected.

Failed position sensor.

Footswitch connector/wiring is damaged.

Footswitch membrane is damaged.

1. Verify that power is present on the chair circuit board. If DS1 is off, follow instructions for verifying power

connections.

2. If DS1 is illuminated, use the Testpoint header, P3, to activate chair movements.

3. If using the Testpoint header, P3, does not activate chair movements, verify that the chair lockout is not activated

(DS13 should be off).

4. Verify the foot control is not in use.

5. If DS13 is illuminated, verify the wiring and plumbing to any local air electric switch connected to J4.

Connect position sensor to correct board locations:

P1 — Back position sensor P2 — Base position sensor

1. Check position sensor connections to the chair circuit board.

2. Reconnect if disconnected.

1. Check that the LED on the position sensor circuit board is on, showing connection.

NOTE The LED is only on when the chair is moving.

If the LED on the position sensor is off, and it is connected to the chair board that is on, replace the position sensor

as a complete assembly.

Verify chair operates from a touchpad or the Testpoint header, P3. Replace the footswitch connector and/or wiring assembly.

Check footswitch connectors and membrane, replace as necessary.

Dental Chair Troubleshooting

Problem Possible Cause Action

The chair makes a growling noise when base up is pressed

A button on a touchpad does not work. Function works from other location(s)

The automatic positions do not

work, the A-dec logo is ashing,

double blinks

Double-articulating headrest

does not lock or is difcult to

unlock

A double-articulating headrest

may be difcult to move or may

drift downward

Circuit breaker 1 or 2 opens Electrical short in a module.

Hydraulic hose from reservoir to pump is pinched.

Chair is low on hydraulic uid. Add hydraulic uid.

Motor pump has an obstruction or is damaged.

Faulty touchpad.

The jumper is in the factory default position on the chair circuit board Testpoint header, P3.

The headrest needs adjustment or needs replacing.

Glidebar needs tension adjustment.

1. Inspect all hydraulic hoses, ensure they are not being pinched in any position.

2. If the supply tube between the pump and the reservoir is kinked, order and install kit.

CAUTION Use only A-dec hydraulic uid, p/n 61.0197.00.

If chair continues to growl, replace the motor assembly.

1. Verify the function works from other locations (footswitch, chair Testpoint header, P3, and cuspidor buttons).

2. Verify the touchpad circuit board is snapped into the plastic cover correctly.

3. If the function still does not work, replace the touchpad.

Move the jumper from the factory default position to the “spare” position on the Testpoint header, P3.

Adjust the headrest. If the headrest still does not work correctly, replace it as an assembly. No eld service to locking

components.

To adjust the tension, use a 1/8" hex key and turn the tension adjustment screw to the right increase friction to the left to decrease friction.

1. Disconnect the identied modules from the power supply.

2. Reset the circuit breaker.

3. Reconnect modules one at a time until circuit breaker trips. Refer to troubleshooting for that module.

86.0016.00 Rev C 63

A-dec 200 Service Guide Troubleshooting | 64

Delivery Systems

Delivery System Troubleshooting

Problem Possible Cause Action

No water to all handpieces Empty water bottle Fill the water bottle with treatment water.

Kinked air or water tubing Check the water and air tubings for kinks or obstructions.

No water coolant to all the handpieces

No water coolant to one handpiece

Empty water bottle Fill the water bottle with treatment water.

The wet/dry toggle on the foot control is in the dry position

No water coolant air signal from the foot control wet/dry toggle

Pick up a wet handpiece, and move the wet/dry toggle to the wet (blue dot) position.

Check the clear tubing from the foot control for kinks or obstructions:

1. Disconnect the green short-dash (water coolant air signal) tubing from the in-line barb in the support center.

2. With the wet/dry toggle in the wet position (toward blue dot), step on the foot control. There should be ~80 psi

(5.52 bar) of air at the tubing end.

3. If no air is present, check:

• Wet/dry toggle

• Plugged barbs

• Adequate air supply

Water coolant ow controls require

adjustment

Water coolant adjustment stem closed or requires adjustment

Water coolant not activated

See “Handpiece Control Adjustments” on page 30.

1. Activate handpiece.

2. Flip the foot control wet/dry toggle toward the blue dot.

3. Verify the handpiece has water coolant.

Plugged handpiece tubing, terminal or coupler

1. Remove handpiece and coupler from tubing.

2. Operate foot control with water coolant in the on position.

3. Check to see if water is coming out of the handpiece tubing.

4. If no water, check for water coolant at the handpiece position on the control block.

Failed water coolant cartridge. Exchange the failed cartridge with known good cartridge and test the handpiece position.

Delivery System Troubleshooting

Problem Possible Cause Action

Sputtering water from handpieces

Intermittent water coolant to handpiece

Water leaks from vent hole in control block when a wet handpiece is in use

A wet handpiece drips water while in its holder

Water continues to ow after

foot control is released

Faulty or dirty O-ring on barb of water bottle pickup tube.

Damaged pick-up tube. Replace pick-up tube.

Faulty or dirty O-ring on barb of water bottle pickup tube.

Water coolant pressure too low, or air coolant pressure too high.

Water bottle pickup tube too long. Shorten the pickup tube with a diagonal cut at the end.

Faulty water coolant cartridge.

Replace the O-ring. Apply a thin application of silicone grease to the new O-ring.

Adjust water and air coolant as required. See “Handpiece Control Adjustments” on page 30.

1. Replace water coolant cartridge with known good cartridge.

2. If water continues to leak from vent hole, inspect the control block for debris or scratches.

3. Replace if necessary.

Faulty water coolant cartridge.

1. Replace water coolant cartridge with known good cartridge.

2. If water continues to leak from handpiece, inspect the control block for debris or scratches.

3. Replace if necessary.

Faulty handpiece or coupler. Remove handpiece and coupler, and retest water coolant ow.

Faulty control block diaphragm. Replace the diaphragm.

Restricted water coolant tube in the handpiece or coupler.

1. Remove handpiece and coupler.

2. Retest water coolant ow.

Pinched tubing in the foot control. Check that the green tube with the short dash is not pinched between the foot control and the control head.

Water coolant ow set too high. See “Handpiece Control Adjustments” on page 30.

The foot control relay valve sticks. Install a foot control eld service kit in the foot control.

Buttons on touchpad do not

work, but status icon LED is illuminated

86.0016.00 Rev C 65

Faulty data line from touchpad to the data board or from the data board to other boards.

Replace data line with known good data line.

A-dec 200 Service Guide Troubleshooting | 66

Delivery System Troubleshooting

Problem Possible Cause Action

Touchpad does not operate chair, cuspidor or light functions

Touchpad status icon does not light when the master toggle is in the on position

Low air pressure to syringe or handpieces when in use

Handpiece holder valve leaking air

Handpiece holder valve not exhausting

Fiber-optics does not work but touchpad screen changes when handpiece is removed

Bulb is too dim or bright Incorrect ber-optic voltage set. Adjust ber-optic to correct voltage, current, and wire length per manufacturer specication.

Faulty data line from data port circuit board in the control head to the data port board in post box.

No power to chair. Verify the chair is plugged in, the power is on, and the pilot tubing is connected to the power supply air-electric switch.

No power to touchpad. Verify that DS1 is illuminated on the touchpad system circuit board.

Plugged lter on air lter regulator. Replace the lter.

Faulty holder valve. Verify the holder valve is not plumbed backward.

Holder valve locked. Verify the holder valve is active (unlocked).

Faulty holder valve. Replace holder valve.

Bulb has failed. Replace the bulb.

Connected to incorrect handpiece output on QVIOLS.

Replace data line with known good data line.

If DS1 is not illuminated, check for 24 VAC across WAGO connections in the control head. Check for an open circuit breaker on the 300 W power supply.

Replace holder valve. Replace holder valve.

Verify that the intraoral light source is connected to the correct output, and verify that the respective output LED is illuminated on the QVIOLS.

Holders

Problem Possible Cause Action

Handpiece does not operate Handpiece was lifted too soon. When the handpiece is set back in its holder, there is a three second delay before the handpiece will start

again.

Utilities

Problem Possible Cause Action

Unit air pressure drops when unit is in use

Plugged lter element in air lter/

regulator

1. Flip the master toggle to the on position and remove the oor box cover.

2. Locate and observe the air pressure gauge in the oor box while pressing the syringe air button.

If the air pressure drops more than 15 psi, the air lter is clogged. Replace lter.

86.0016.00 Rev C 67

A-dec 200 Service Guide Troubleshooting | 68

Cuspidor

Cuspidor Troubleshooting

Problem Possible Cause Action

DS1 - AC Power LED Off No 24 VAC power, tripped circuit breaker, power supply turned off, no line voltage.

Green, steady 24 VAC at terminal strip.

DS2 - Status LED Off System is not functioning, no power or circuit board has failed.

Green, steady Normal condition.

DS3 - Data LED Off No DCS communication, not connected to the data communication system, the DCS has failed.

Green, steady Active DCS detected.

Green, blinking Valid DCS message.

DS4 - Auxiliary relay LED Off Auxiliary relay is off.

Yellow Auxiliary relay is on.

DS5, DS6 - Bowl rinse/cupll relays Off Relay is off.

Yellow Relay is on.

DS7 - Cuspidor limit switch LED Off Limit switch is not activated (closed).

Red Limit switch is activated (open).

Water drips from the cupll spout The cupll solenoid has failed.

1. Using the master on/off toggle, turn the unit to the off position.

2. Use a syringe to bleed the dental unit water pressure.

3. Remove the cupll solenoid and replace.

Water drips from the bowl rinse spout The bowl rinse solenoid has failed.

1. Flip the master on/off toggle to the off position.

2. Use a syringe to bleed the dental unit water pressure.

3. Replace the bowl rinse water solenoid.

Cupll and bowl rinse functions are

switched

Cupll and bowl rinse functions are

switched at the tower buttons only (touchpads operate normally)

The cuspidor water solenoid connectors are reversed on the cuspidor circuit board.

The cuspidor tower switch connectors are reversed on the cuspidor circuit board.

Switch water solenoid connections at P6 and P7.

Switch tower switch connections at P2 and P3.

Cuspidor Troubleshooting

Problem Possible Cause Action

Water runs constantly from either the

cupll or bowl rinse spout, and the red

LED (DS7) is illuminated on the cuspidor circuit board

Cupll spout sputters air/water The self-contained water bottle is empty or

Cuspidor works but the red LED (DS7) on the cuspidor circuit board is illuminated

Bowl rinse button on the cuspidor

tower does not work, and the function does work from the touchpad

The cuspidor stop switch connector is reversed with one of the cuspidor tower switch connectors.

nearly empty.

The cuspidor stop switch is activated or the wiring is faulty.

Cuspidor tower bowl rinse button assembly is faulty or is disconnected from the cuspidor circuit board P2 connector.

The red LED (DS7) on the cuspidor circuit board is illuminated.

1. Disconnect all three switch connectors from the cuspidor circuit board. One at a time, connect each of

the switch connectors to the cuspidor circuit board until the red LED goes out.

2. Connect one of the remaining switch connectors to P3 on the cuspidor circuit board, and the other

switch connector to P2.

3. Verify that a cupll cycle runs when requested from the cuspidor tower cupll button.

4. If the bowl rinse runs, swap the two switch connections to the cuspidor circuit board.

Rell the bottle.

1. Remove any obstacles from under the cuspidor bowl.

2. Disconnect the cuspidor stop switch from P4 on the cuspidor circuit board; install the jumper from P1

on the cuspidor circuit board.

3. If the red LED on the cuspidor circuit board goes out, the cuspidor stop switch or wiring is faulty and

must be replaced.

Visually inspect the cuspidor circuit board. Ensure that the cuspidor tower switches are connected.

• P2 - Bowl rinse switch

• P3 - Cupll switch If the switches are connected, check the continuity of the bowl rinse switch with an Ohm meter. With the bowl rinse switch held down (closed), it should measure less than ten Ohms. If it measures “open” across the closed switch, remove and replace the bowl rinse switch assembly

NOTE Switching switch assemblies at P2 and P3 allows verification that the

switch assembly is defective.

Cupll button on the cuspidor tower

does not work, and the function does work from the touchpad

Cuspidor tower cupll button assembly is

faulty or is disconnected from the cuspidor circuit board P3 connector.

Visually inspect the cuspidor circuit board, ensure that the cuspidor tower switches are connected:

• P2 - Bowl Rinse Switch

• P3 - Cupll Switch

If the switches are connected, check the continuity of the cupll switch with an Ohm meter. With the cupll

switch held down (closed), it should measure less than ten Ohms. If it measures “open” across the closed

switch, remove and replace the cupll switch assembly.

NOTE Switching switch assemblies at P2 and P3 allows verication that the

switch assembly is defective.

86.0016.00 Rev C 69

A-dec 200 Service Guide Troubleshooting | 70

Cuspidor Troubleshooting

Problem Possible Cause Action

Inadequate bowl rinse water ow. The bowl rinse water ow must be

adjusted.

The water lter element is partially

plugged.

There is a kinked hose. Check for a restriction downstream from the lter. Locate and eliminate any kinks in the blue 5/16” bowl

Bowl rinse function does not work from

the cuspidor tower and/or the touchpad bowl rinse button, and the

cupll function does work

Cupll function does not work from the

cuspidor tower and/or from any

touchpad cupll button, and the bowl

rinse function does work

The bowl rinse relay on the cuspidor circuit board has failed.

The cuspidor data line is damaged. Ensure that the cuspidor tower switches are connected:

The bowl rinse solenoid has failed. Remove and replace the bowl rinse water solenoid.

The cupll relay on the cuspidor circuit

board has failed.

The cuspidor data line is damaged. Ensure that the cuspidor tower switches are connected correctly:

Adjust the bowl rinse ow clockwise to increase water ow, or counterclockwise to decrease ow, (one full

turn from minimum to maximum).

Check for plugged water regulator lter element.

1. Close the city water manual shut-off valve in the oor box and bleed the cuspidor bowl rinse water

pressure, using the bowl rinse function.

2. Turn the dental unit off using the master on/off toggle on the delivery system and remove the water

regulator lter element cap. Remove and discard the lter element.

3. Install a new lter element on the water regulator and reinstall the lter cap.

4. Open the city water manual shut-off valve. Turn the dental unit on using the master on/off toggle, and

test the bowl rinse function for adequate water ow.

rinse water tube.

At the cuspidor circuit board, swap the water solenoid connectors at P6 and P7. Press the cupll button on any touchpad or the cupll switch on the cuspidor tower, if the bowl rinse runs, remove and replace the

cuspidor circuit board.

• P2 – Bowl rinse switch

• P3 – Cupll switch Disconnect the data line from the cuspidor and press the bowl rinse switch on the cuspidor tower. If the bowl rinse runs, remove and replace the cuspidor data line.

Swap the water solenoid connectors at P6 and P7, at the cuspidor circuit board. Press Bowl Rinse on any touchpad or the bowl rinse switch on the cuspidor tower. If the cupll runs, remove and replace the

cuspidor circuit board.

• P2 – Bowl rinse switch

• P3 – Cupll switch

Disconnect the data line from the cuspidor and press the cupll switch on the cuspidor tower. If the cupll

runs, remove and replace the cuspidor data line.

The cupll water solenoid has failed. Remove and replace the cupll water solenoid.

Dental Light

Dental Light Troubleshooting

Problem Possible Cause Action

Light does not work (light connected to 200 dental light relay board)

Light works from the dental light switches but not from a touchpad

Light head is loose or difcult to position Rotation tension screws are too loose or

The bulb has failed. Check for voltage at the bulb socket, if voltage is present, replace the bulb.

The dental light circuit breaker, CB6, has

been tripped or the power supply has failed.

The bulb socket is faulty. Replace the socket.

Light switch is not in one of the on positions

Faulty data line from the touchpad to the circuit board.

Light cable is plugged directly into power supply.

tight.

Check the color of the bulb, replace if discolored.

• Check the circuit breaker and reset it. If the circuit breaker trips again, disconnect P4, J5, and J6 on the 200 chair board. If the circuit breaker trips again, replace the power supply.

• If the circuit breaker does not trip, reconnect P4. If the circuit breaker now trips, replace the 200 chair circuit board.

• If the circuit breaker does not trip, reconnect the connections to J5. If the circuit breaker trips, replace the dental light.

The dental light circuit breaker is near the power transformer. If the breaker is tripped, disconnect the dental light wiring harness from the transformer and reset the breaker. If the breaker trips again, replace the circuit breaker. If the breaker does not trip, the dental wiring harness or a switch is faulty.

Turn the light switch to either on position.

Temporarily substitute a known good data line from the touchpad to the circuit board, if the light works from the touchpad, determine and replace any bad bypassed data lines.

See page 53 for instructions on correctly connecting the light cable to the dental light relay board.

Adjust the appropriate axis tension.

Flexarm drifts Tension adjustment nut inside the

exarm is too loose or tight.

86.0016.00 Rev C 71

Adjust the exarm counterbalance.

A-dec 200 Service Guide Troubleshooting | 72

Dental Light Troubleshooting

Problem Possible Cause Action

Light intensity is dim, inconsistent, or the color is distorted

Unsatisfactory light pattern Light is out of focus, reector or light

Light switch does not turn the light on (no relay board)

Reector or light shield may be

damaged.

The mains voltage is low. Verify the mains voltage is within specications: 100/110-120/220-240 VAC

shield may be damaged.

No mains voltage/unit is off Verify that the unit is turned on

Light cable is not connected or connected incorrectly

Faulty light switch Replace the switch

Faulty bulb/socket Replace the bulb or socket

Inspect the dental light shield and reector for damage or contamination. Replace or clean as

necessary.

CAUTION Abrasives, disinfectants or chlorine damage the shield and

reflector. Refer to the Instructions for Use for cleaning instructions.

1. Focus the light.

2. Check the light shield for severe abrasions, and replace if necessary.

3. Clean the reector and light shield

Verify that the cable is connected correctly

86.0016.00 Rev C 73

A-dec Headquarters

2601 Crestview Drive Newberg, OR 97132 USA Tel: 1.800.547.1883 Within USA/Canada Tel: 1.503.538.7478 Outside USA/Canada Fax:1.503.538.0276 www.a-dec.com

International Distribution Centers

A-dec United Kingdom

EU Authorized Representative

Austin House, 11 Liberty Way Nuneaton, Warwickshire CV11 6RZ England Tel: 0800 ADECUK (233285) Within UK Tel: +44 (0) 24 7635 0901 Outside UK www.a-dec.co.uk

A-dec Australia

Unit 8 5-9 Ricketty Street Mascot, NSW 2020 Australia Tel: 1.800.225.010 Within Australia Tel: +61 (0)2 8332 4000 Outside Australia www.a-dec.com.au

ÍvÈ.ÇÂ0È.00tÎ

SG_1

A-Dec 200 Service guide (2014)

Specifications and Main Features

Frequently Asked Questions

User Manual

Introduction

Get Support

International Customer Service

Other Sources of Information

Service Reference

Other A-dec Service Documents

A-dec 200 System Map

Service Tools

Dental Chair

Dental Chair Product Overview

Power and Status

Limit Switch and Chair Lockout

Circuit Board Components

Dental Chair Service, Maintenance, and Adjustments

Remove Upholstery and Covers

Factory Default Routine

Potentiometers

Adjust the Base Up Limit Switch:

Adjust the Base Positioning Potentiometer

Adjust the Back Potentiometer

Hydraulic System

Solenoids

Test the Solenoid

Remove and Replace the Solenoid

Test the Motor Pump

Headrest Adjustments

Chair Speed Adjustments

Programming

Chair Positions

Chair Preset Buttons

Program Chair Preset Buttons

X-Ray/Rinse Button Feature

Dental Light

Auto Light Feature

Cuspidor Cupfill and Bowl Rinse

Standard Cuspidor (no touchpad)

Cuspidor with Optional Touchpad

Customize Cupfill and Bowl Rinse Functions

Delivery System

Delivery System Product Overview

A-dec Tubing

Delivery System Service, Maintenance, and Adjustments

Flexarm Adjustments

Holder Adjustments

Adjust the Doctor’s Holder

Adjust the Handle

Control Block

Remove the Control Block

Handpiece Control Adjustments

Adjust the Water Coolant

Adjust the Air Coolant

Adjust the Drive Air Pressure

Oil Collector

Handpiece Tubing Replacement

Adjust Tubing Length

Quad Voltage Intraoral Light Source (QVIOLS)

Intraoral Light Source Adjustments

Intraoral Light Source Length and Voltage

Cuspidor and Support Center

Cuspidor and Support Center Product Overview

Cuspidor and Support Center Service, Maintenance, and Adjustments

Adjust the Bowl Rinse Flow

Self-Contained Water System

Adjusting the Cuspidor Cupfill and Bowl Rinse

Adjust the Water Bottle

Assistant's Instrumentation

Assistant's Instrumentation Product Overview

Assistant's Instrumentation Service, Maintenance, and Adjustments

Auto-air Holder

Position the Assistant’s Holder

Assistant's Touchpad Connections

Vacuum Instrumentation

Solids Collector

Utilities

Utilities Product Overview

Shutoff Valves