A-dec 311, 411, 511 User manual
A-dec 311, 411, and 511 Dental Chairs Service Guide
Contents
Overview ......................................................................................................... 3
Copyright and Regulatory Information ................................................................. 3
Trademarks and Additional Intellectual Property Rights ....................................... 3
Product Service ........................................................................................................ 3
Regulatory Information ............................................................................................3
Product Models and Versions Covered in This Document .................................... 3
Customer Service Information............................................................................... 4
A-dec Headquarters ................................................................................................. 4
A-dec Australia ......................................................................................................... 4
A-dec China .............................................................................................................. 4
A-dec United Kingdom ............................................................................................. 4
Other Sources of Information ................................................................................ 4
A-dec 311, 411, and 511 Dental Chairs Service Reference ................................. 4
Other A-dec Service Documents ............................................................................. 4
Electronic Documentation ...................................................................................... 4
A-dec Dental Chairs ................................................................................................ 5
Chair Comparison Chart ......................................................................................... 6
Flow Diagrams ............................................................................................... 8
311 (A) Chair Flow Diagram (Before March 2013) .............................................. 8
311 (A) [Effective March 2013]/311 (B)/411 Chair Flow Diagram ................... 9
511 Chair Flow Diagram ...................................................................................... 10
Circuit Board Components ......................................................................... 12
311 (A and B)/411 Chair Circuit Board .............................................................. 12
311 (A and B)/411 Chair Circuit Board LED Identication .................................13
311 (A and B)/411 Chair Circuit Board Identication .........................................13
511 Chair Circuit Board ....................................................................................... 14
511 Chair Circuit Board LED Identication ..........................................................15
511 Chair Circuit Board Identication ..................................................................15
311 (A) Chair Service, Adjustments, and Maintenance ...........................16
Chair Covers [311 (A)] ..........................................................................................16
Integrated Floor Box Cover Removal ....................................................................16
Contoured Floor Box Cover Set Removal ............................................................. 17
Lift Arm Covers Removal ....................................................................................... 17
Upholstery [311 (A)] .............................................................................................18
Back Upholstery Removal/Attachment ................................................................18
Headrest Upholstery Removal/Attachment .........................................................18
Seat Upholstery Removal/Attachment .................................................................18
Factory Default Routine [311 (A and B) and 411] .............................................19
Chair Drive System [311 (A)]................................................................................20
Chair Manifold Adjustment System [311 (A)] ......................................................20
Hydraulic Fluid Replenishment [311 (A)] ............................................................. 21
Capacitor Replacement [311 (A and B)/411] ....................................................22
Chair Input Voltages ..............................................................................................22
Motor Driven Electro-Mechanical Actuator [311 (A and B)/411] ....................23
Position Sensor [311 (A and B)/411] .................................................................23
Factory Default Routine ........................................................................................23
Limp Along Feature................................................................................................23
Solenoid [311 (A)] ................................................................................................. 24
Solenoid Testing ....................................................................................................24
Magnetic Pull Test for Coil Resistance ................................................................. 24
Volt/Ohm Meter Test for Coil Resistance ............................................................. 24
Solenoid Assembly Replacement [311 (A)] .........................................................25
Headrest Adjustments [311 (A)] ..........................................................................26
Patient-Adjustable Neck Support Removal/Attachment ....................................26
Reposition Neck Support ......................................................................................26
Dual-Articulating Headrest [311 (A and B)/411] .............................................. 26
Headrest Adjustment ............................................................................................26
Glide Bar Tension Adjustment ..............................................................................26
Two-Position Armrest Adjustments [311 (A)] ..................................................... 27
Armrests Repositioning ......................................................................................... 27
Armrests Locking ................................................................................................... 27
86.0380.00 Rev B Contents 1
A-dec 311, 411, and 511 Dental Chairs Service Guide Contents 2
311 (B) and 411 Chairs Service, Adjustments, and Maintenance ........ 28
Chair Covers ......................................................................................................... 28
Upholstery [311 (B) and 411] .............................................................................. 29
Back Upholstery Removal/Attachment ................................................................29
Headrest Upholstery Removal/Attachment .........................................................29
Seat Upholstery Removal/Attachment .................................................................29
Chair Drive System [311 (B) and 411] ................................................................30
Hydraulic System [311 (B) and 411] .................................................................... 31
Hydraulic Fluid Reservoir Replenishment [311 (B) and 411] ............................. 31
Factory Default Routine [311 (A and B) and 411] .............................................32
Capacitor Replacement [311 (B)/411] ..............................................................33
Chair Input Voltages ..............................................................................................33
Motor Driven Electro-Mechanical Actuator [311 (B) and 411] .........................34
Position Sensor [311 (A and B)/411] .................................................................35
Factory Default Routine ........................................................................................35
Limp Along Feature................................................................................................35
Solenoid [311 (B) and 411] .................................................................................36
Solenoid Testing ....................................................................................................36
Magnetic Pull Test for Coil Resistance .................................................................36
Volt/Ohm Meter Test for Coil Resistance .............................................................36
Solenoid Assembly Replacement [311 (B) and 411] .......................................... 37
Chair Stop Plate [311 (B) and 411] .....................................................................38
Stop Switch ............................................................................................................38
Chair Bump-Up Feature [311 (B) and 411] ..........................................................38
Dual-Articulating Headrest [311 (A)/311 (B)/411] ........................................... 39
Headrest Adjustment ............................................................................................39
Glide Bar Tension Adjustment ..............................................................................39
Armrest Adjustments [311 (B) and 411] ............................................................40
Two-Position Armrests Adjustment .......................................................................40
Arm Rest Rotation Tension Adjustment ................................................................40
Swivel Brake Adjustment [311 (B) and 411] ...................................................... 41
Swivel Brake........................................................................................................... 41
Swivel Brake Tension Adjustment ........................................................................ 41
Factory Default Routine (511) .............................................................................44
Chair Drive System (511) ..................................................................................... 45
Hydraulic Cylinders ............................................................................................... 45
Motor Driven Hydraulic Pump ..............................................................................45
Hydraulic System (511) .........................................................................................46
Hydraulic Fluid Reservoir Replenishment (511) ..................................................46
Capacitor (511) ..................................................................................................... 47
Solenoid (511) ......................................................................................................48
Solenoid Testing ...................................................................................................48
Magnetic Pull Test for Coil Resistance .................................................................48
Volt/Ohm Meter Test for Coil Resistance .............................................................48
Solenoid Assembly Replacement (511) ...............................................................49
Position Sensors (511) .........................................................................................50
Chair Stop Plate (511) .......................................................................................... 51
Stop Switch ............................................................................................................ 51
Chair Bump-Up Feature (511) ............................................................................... 51
Headrest Adjustment (511) ................................................................................. 52
Swivel Brake Adjustment (511) ...........................................................................53
Swivel Brake Operation .........................................................................................53
Swivel Brake Tension Adjustment ........................................................................53
Chair Programming .................................................................................... 54
Overview ................................................................................................................ 54
Chair Positioning ..................................................................................................55
Chair Direction Buttons .........................................................................................55
Programmable Chair Buttons/Factory Presets ....................................................55
Customize the X-Ray/Rinse Button ......................................................................55
Troubleshooting .......................................................................................... 56
Overview ................................................................................................................ 56
A-dec 311 (A and B) and 411 Dental Chairs Troubleshooting ..........................56
A-dec 511 Dental Chairs Troubleshooting .......................................................... 59
Chair Circuit Board Diagnostics .......................................................................... 63
511 Chair Service, Adjustments, and Maintenance ............................... 42
Chair Covers (511) ................................................................................................ 42
Upholstery (511) ................................................................................................... 43
Back Upholstery Removal/Attachment ................................................................43
Headrest Upholstery Removal/Attachment .........................................................43
Seat Upholstery Removal/Attachment .................................................................43
Overview
Copyright and Regulatory Information
Copyright
© 2015 A-dec Inc. All rights reserved.
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 United States and
other countries. A-dec 400, A-dec 200, Inspire, 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.
Product Service
For product service information, please contact your local authorized
A-dec dealer. To find your local dealer, visit www.a-dec.com.
Regulatory Information
Warranty information is provided in the Regulatory Information,
Specifications, and Warranty document (p/n 86.0221.00), which is
available in the Document Library at www.a-dec.com. This document
includes:
• Serial number identification
• Software revisions
• Deluxe touchpad help messages
• Intended application and use statements
• Identification of symbols
• Environmental specifications
• Classification of equipment
• Electrical rating and electromagnetic information
• Chair load capacity
Product Models and Versions Covered in This Document
A-dec uses product versions to indicate significant changes to a product
model. Modifications identified by a change to the product version
include, but are not limited to, significant changes to features and
options, and product compatibility.
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.
86.0380.00 Rev B Overview 3
Models Versions Description
311 A, B Dental Chairs
411 A Dental Chairs
511 A Dental Chairs
A-dec 311, 411, and 511 Dental Chairs Service Guide Overview 4
Customer Service Information
For questions not addressed in this document, contact A-dec Customer
Service using contact information for your region.
A-dec Headquarters
2601 Crestview Drive
Newberg, Oregon 97132
United States
Tel: 1.800.547.1883 within USA/CAN
Tel: +1.503.538.7478 outside USA/CAN
Fax: 1.503.538.0276
www.a-dec.com
A-dec Australia
Unit 8
5-9 Ricketty Street
Mascot, NSW 2020
Australia
Tel: 1.800.225.010 within AUS
Tel: +61.(0).2.8332.4000 outside AUS
A-dec China
A-dec (Hangzhou) Dental Equipment Co., Ltd.
528 Shunfeng Road
Qianjiang Economic Development Zone
Hangzhou 311106
Zheijiang, China
Tel: +1.503.538.7478
A-dec United Kingdom
EU Authorized Representative
Austin House, 11 Liberty Way
Nuneaton, Warwickshire CV11 6RZ
England
Tel: 0800.ADEC.UK (2332.85) within UK
Tel: +44.(0).24.7635.0901 outside UK
Tel: +44 (0) 24 7635 0901 outside UK
www.a-dec.co.uk
Web Contact
Partner Resources websites: www.a-dec.biz.
Other Sources of Information
A-dec 311, 411, and 511 Dental Chairs Service Reference
The A-dec 311, 411, and 511 Dental Chairs Service Guide is a companion
to the A-dec 311, 411, and 511 Dental Chairs Service Reference (p/n
86.0381.00). The service reference contains illustrated parts breakdown
content. Circuit board components and flow diagrams are in both
documents.
Other A-dec Service Documents
The A-dec 300, 400, and 500 Delivery Systems Service Guide (p/n
86.0382.00) contains service, maintenance, and troubleshooting
content. The A-dec 300, 400, and 500 Delivery Systems Service Reference
(p/n 86.0383.00) contains illustrated parts breakdown content. Circuit
board components and flow diagrams are in both documents. These
documents include cuspidors, floor boxes, and support centers.
The A-dec Dental Lights and Monitor Mounts Service Guide (p/n
86.0326.00) contains service, maintenance, and troubleshooting content
for A-dec dental lights and monitor mounts. The A-dec Dental Lights and
Monitor Mounts Service Reference (p/n 86.0328.00) contains illustrated
parts breakdown content. Circuit board components and flow diagrams
are in both documents.
Genuine A-dec Parts Catalog
The Genuine A-dec Service Parts Catalog, p/n 85.5000.00, provides part
number and ordering information for A-dec serviceable parts. This
catalog details service parts for current products and products which
are no longer manufactured but are still supported. Refer to this catalog
for additional details on parts found in the service guide.
Electronic Documentation
The latest versions of A-dec documents are available as electronic
documents on the A-dec website (www.a-dec.com). On the website,
select Document Library in the upper-right corner of the page. Check
this location for the most current technical information about A-dec
products.
A-dec Dental Chairs
A-dec 311 (Version A) Dental Chair
An optional contoured floor box is also available.
A-dec 311 (Version B) Dental Chair
A-dec 411 Dental Chair
A-dec 511 Dental Chair
86.0380.00 Rev B Overview 5
A-dec 311, 411, and 511 Dental Chairs Service Guide Overview 6
Chair Comparison Chart
A-dec 311 (Version A) Chair A-dec 411/311 (Version B) Chair A-dec 511 Chair
On/Off Button Location
Power On/Off
Power Supplies
Dual Articulating Headrests/
Neck Support
311 Power Supply
(Before March 2013)
Neck Support
Locking Knob
311 (A and B) /411 Power Supply
(Effective March 2013)
Locking Knob
Lever Release
Lever Release
A-dec 311 (Version A) Chair A-dec 411/311 (Version B) Chair A-dec 511 Chair
Stop Switch Location (not applicable)
Stop Switch
Chair Drive System Hydraulic Base
Electrical Back
Armrests Two-Position Armrest Multi-Position Armrest
Hydraulic Base
Hydraulic Back
86.0380.00 Rev B Overview 7
A-dec 311, 411, and 511 Dental Chairs Service Guide Flow Diagrams 8
Flow Diagrams
311 (A) Chair Flow Diagram (Before March 2013)
Utilities
To Control Head
Master Toggle
To Water Manifold/
Cuspidor
From Control Head
To Control Head and
Foot Control
(Optional
Moisture
Separator)
To Drain
Chair
Hydraulic
Pump
Base Position Sensor
Back Position Sensor
Solenoid
Linear
Actuator
Power Supply
Capacitor
To Support Center
Power Supply (Top
View)
From 371 Dental
Light or 571-300
Dental Light
Footswitch
311 (A) [Effective March 2013]/311 (B)/411 Chair Flow Diagram
To Control Head
Master Toggle
To Water Manifold/
Cuspidor
From Control Head
To Control Head and
Foot Control
To Drain
(Optional Moisture
Separator)
Utilities
From Control Head (optional
moisture separator)
Back Tilt Motor
Power Supply
Capacitor
Solenoid
Hydraulic
Pump
Position Sensors
(Back) (Base)
Back Limit Switch (411 Only)
From LED Light
Base Limit Switch (311 (B) and 411 Only)
43.0363.00
Power Supply (Front View)
From Radius Delivery
From 551 Assistant’s Arm
To Chair Power Supply
371 Light
571-300 Light
Chair
From 461 Post Box
300 Delivery
551 Assistant’s
461 Post Box
To Chair Power Supply
361, 362, 363 Post Box
Chair Lockout Kit
Footswitch
86.0380.00 Rev B Flow Diagrams 9
A-dec 311, 411, and 511 Dental Chairs Service Guide Flow Diagrams 10
511 Chair Flow Diagram
Base Position
Sensor
Base Stop Switch
Lower Support Arm and
Link Limit Switch
Back Position
Sensor
To Water Bottle
To Cuspidor Cupfill
From Master Toggle
From Water bottle
To Master Toggle
To Control Block
To Flush Valve and Doctor's Syringe
To Assistant’s Syringe
To Assistant’s Syringe
To Amalgam Separator
To Data as Required
Footswitch
(Switch without Tubing)
To Delivery
System
Power Supply
240 V Connector
To Pre-Regulator
To Line volt Accessory
To Support Center
To Dental Light
To Control Head
or Assistant’s
Touchpad
From Mains
Manifolds
From Regulator
From
Reservoir
240 V Connector
Capacitor
To Foot Control
120 V - Hydraulic Pump
To Lift Cylinder
To Tilt Cylinder
240 V - Hydraulic Pump
(Pink Wires)Black and White Wires
86.0380.00 Rev B Flow Diagrams 11
A-dec 311, 411, and 511 Dental Chairs Service Guide Circuit Board Components 12
BACK
BASE
43.0363.00
16
5
25
26
27
Circuit Board Components
311 (A and B)/411 Chair Circuit Board
20
30
21
31 32
4
1
3
11
18
33
24
34
8
12
9
15
13
14
P13 and DS4:
• 311 (A): Effective July 2013: Jumpers are required on P10 and
P13 for the 311 (A) chair.
• 311 (B): Jumpers are required on P13 only.
• 411: No jumpers required. 411 has a base and a back limit switch.
19
17
28
29
7
2
10
23
22
6
311 (A and B)/411 Chair Circuit Board LED Identification
311 (A and B)/411 Chair Circuit Board Identification
LED Status Description
DS1, DS14, and
DS15 - AC power
LED
DS2 and DS16Status LED
DS3 - Data LED Off No DCS communication, not connected to
DS13 - Chair lockout Off Open, (normal)
DS5, DS6 - Chair
position sensors
DS9, DS10, DS11,
DS12, DS17- Chair
relay LEDs
DS7, DS8 - Dental
light relay LEDs
Off No 24 VAC power, tripped circuit breaker,
power supply turned off
Green, steady
Off System is not functioning, no power, or
Blue, steady
Blue, single blink
Blue, double blink
Green, steady
Green, blinking
Red, on
Off Position Sensor: not connected or bad
Yellow, steady
Yellow, fast blink
Yellow, slow blink
Off Relay is off
On Relay is on
Off Relay is off
On Relay is on
24 VAC present
circuit board has failed
Normal operation
Duty cycle limit of chair back has been
exceeded
Jumper is in factory mode
the DCS, or DCS has failed
Detects active DCS
Valid DCS Message
Closed, (activated)
connection; moving in wrong direction;
limited range of motion
Normal operation
Upper end of travel
Lower end of travel
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.
Item Description Item Description
1 DS1 - AC power LED (CB1) 18 P5 - touchpad or footswitch connector
2 DS2, DS16 - status LEDs 19 P6/P7 - data ports
3 DS3 - data LED 20 P8 - back motor connector
4 DS5 - back position sensor, LED/
P1 Connector
5 DS6 - base position sensor LED/
P2 connector
6 DS7 - dental light LED/Relay K6 23 P12 - input power connector
7 DS8 - dental light LED/Relay K1 24 J1 - 0 VAC terminal strip (output) for
8 DS9 - back up LED/Relay K2 25 J2 - 24 VAC terminal strip (output) for
9 DS10 - back down LED/relay K3 26 J3 - 0 VAC terminal strip (output) for
10 DS11 - base up LED/relay K4 27 J3 - 24 VAC terminal strip (output) for
11 DS12 - base down LED/relay K5 28 J5 - dental light output terminal strip
12 DS13 - chair lockout LED/terminal
strip J4
13 DS14 - AC power LED (CB4) 30 J7 - base solenoid terminal strip
14 DS15 - AC power LED (CB5) 31 P10 - Jumper - 311 (A) chair only
15 DS17 - back on LED/Relay K7 32 P13 - Jumper - 311 (A and B) chairs
16 P3 - testpoints header 33 DS4 - Base stop switch
17 P4 - input power connector 34 DS 18 - Back stop switch
21 P9 - input power connector
22 P11 - base motor connector
Assistant’s, doctor’s, oor box
assistant’s, doctor’s and oor box
support center
support center
29 J6 - dental light input terminal strip
86.0380.00 Rev B Circuit Board Components 13
A-dec 311, 411, and 511 Dental Chairs Service Guide Circuit Board Components 14
511 Chair Circuit Board
15
1
2
16
14
17
20
11
12
13
18
21
10
19
9
8
3
4
5
6
7
511 Chair Circuit Board LED Identification
511 Chair Circuit Board Identification
LED Status Description
DS1 - AC power
LED
DS2 - Status LED Off System is not functioning, no power or circuit
DS3 - Data LED Off No DCS communication, not connected to the
DS4 - Chair limit
switch
DS13 - Chair
lockout
DS5 + DS6 Chair position
sensors
DS9, DS10,
DS11, DS12 Chair relay LEDs
DS7, DS8 Dental light relay
LEDs
DS14 - Vacuum
relay LED
Off No 24 VAC power, tripped circuit breaker, power
supply turned off, no line voltage
Green, steady
Green, steady
Green, steady
Green, blinking
Off Closed, (normal)
Red
Off Open, (normal)
Red
Off Position Sensor: Not connected or bad connection;
Yellow, steady
Yellow, fast blink
Yellow, slow blink
Off Relay is off
On Relay is on
Off Relay is off
On Relay is on
Off Relay is off
On Relay is on
24 VAC at the terminal strip
board has failed
Normal operation
DCS, or DCS has failed
Detects active DCS
Valid DCS message
Open, (activated)
Closed, (activated)
moving in wrong direction; limited range of motion;
or cable is not on the pully
Normal operation
Upper end of travel
Lower end of travel
Item Description Item Description
1 P7, P8, P9 - data ports 11 DS1 - AC power LED
2 DS4 - stop switch LED (limit
switch)/P10 connector
3 DS5 - back position sensor LED/
P1 connector
4 DS6 - base position sensor LED/
P2 connector
5 P5 - footswitch connector 15 J2 - 0 VAC terminal strip (output)
6 P3 - testpoints header 16 J2 - 24 VAC terminal strip (output)
7 DS12 - base down LED/relay K5 17 P4 - Input power/dental light
8 DS11 - base up LED/relay K4 18 J3 - vacuum relay K7 output terminal
9 DS10 - back down LED/relay K3 19 P11 - pump motor/solenoid
10 DS9 - back up LED/relay K2 20 DS8 - dental light LED relay/K1
12 DS2 - status LED
13 DS3 - data LED
14 DS13 - chair lockout LED/terminal
strip J1
connector
strip
connector
21 DS7 - dental light LED relay/K6
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.
86.0380.00 Rev B Circuit Board Components 15
A-dec 311, 411, and 511 Dental Chairs Service Guide 311 (A) Chair Service, Adjustments, and Maintenance 16
311 (A) Chair Service, Adjustments, and Maintenance
Chair Covers [311 (A)]
DANGER Failure to turn off the power before you begin this
procedure can lead to electrical shock.
WARNING Failure to turn off the power before you begin this
procedure can lead to product damage and result in serious
injury or death.
CAUTION When removing or replacing covers, take care not
to damage any wiring or tubing. Verify that the covers are
secure after replacing them.
Integrated Floor Box Cover Removal
To access the on/off button and power supply on chairs with an
integrated floor box cover, pull the utility cover out at the cover posts
and lift the cover off .
Cover
Post
Contoured Floor Box Cover Set Removal
To access the on/off button and power supply on chairs with a
contoured floor box cover set, first remove the front floor box cover.
Grasp the cover on both sides and pull up. If needed, use a large coin in
the integrated coin slot to gently separate the contoured floor box cover
from the frame. Then remove the power supply cover.
2. With your thumbs on the top of the upper lift arm cover, grasp
from the bottom and pull up and push in to disengage tabs from
slots.
3. Lift out the upper lift arm cover.
Coin Slot
CAUTION Take care not to damage the cover when using the
coin slot.
Lift Arm Covers Removal
If the utility cover is installed, remove it before beginning this
procedure.
1. Raise the chair base all the way up.
4. Remove the lift arm and lower lift arm cover.
86.0380.00 Rev B 311 (A) Chair Service, Adjustments, and Maintenance 17
A-dec 311, 411, and 511 Dental Chairs Service Guide 311 (A) Chair Service, Adjustments, and Maintenance 18
Upholstery [311 (A)]
Back Upholstery Removal/Attachment
To remove the upholstery, firmly grasp the bottom edge of the armature
and lift up, then lift the upholstery away from the chair back support.
To reattach, place the key holes in the armature over the large fastener
heads, then push down until the upholstery inserts into position.
Remove
Headrest
Lift up, then
pull out
Fastener
Heads
Fastener
Heads
Headrest Upholstery Removal/Attachment
To remove the headrest upholstery, position the headrest to access the
two screws on the back, loosen the screws and remove the upholstery.
To reattach, position the headrest to access the screws, place the
upholstery on the headrest, insert and tighten the screws.
Lift up, then
pull out
Seat Upholstery Removal/Attachment
To remove the seat upholstery, pull the pins out on both sides of the
seat armature, then lift the seat and move it away.
CAUTION When replacing the upholstery, ensure the pins are
completely in place. The pin ring should be flush with the
seat armature.
Armature
Pin Ring
Mounting
Screws
BACK
BASE
43.0363.00
Factory Default Routine [311 (A and B) and 411]
CAUTION The position sensors can be inadvertently installed
upside down. Improper installation will limit the chair’s
functionality.
After installing a new chair, circuit board, or position sensor, run the
factory default routine. The routine:
• Sets the chair base and back upper limits
• Calculates new preset positions based on actual range of motion
of the chair
• Verifies that the position sensors work correctly
To start the factory default routine, place the spare jumper in the factory
default position on the P3 test points of the chair circuit board.
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.
Jumper in
Factory
Default
Position
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 mid position.
6. Moves back and base down.
7. Moves base and back to mid position.
8. Moves base and back to Entry/Exit.
9. Three beeps confirm the routine completed successfully.
Once the routine completes, place the jumper into the Spare position
on P3.
NOTE The jumper must remain in the factory default
position to complete the factory default routine. The status
LEDs on the standard and deluxe touchpads and the chair
circuit board double blink while the factory default routine
is running and after the routine is complete. When the
routine is complete, three beeps sound. If the routine stops
prematurely, one beep sounds.
NOTE One beep indicates the routine failed to complete. See
page 56 for troubleshooting.
86.0380.00 Rev B 311 (A) Chair Service, Adjustments, and Maintenance 19
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