A-dec 500 User Manual 17-38
85.0816.00 Rev A 2004-11 (PCA 04002.12) Page 17
A-dec Service Guide, Vol. II A-dec 511 Chair
The A-dec 511 chair is designed to provide a range of movements to position the
patient for dental treatment.The dental chair consists of a stable base, an ergonomically
synchronized seat and back support, adjustable head support, and collapsible arm
support.The chair movement is controlled through the use of a footswitch and/or
touchpad(s). Entry, treatment, and exit positioning of the chair is delivered through the
use of a hydraulic system and four programmable positions.The deluxe touchpad
option provides two operators with four more potentially programmable positions for a
total of eight.
This section provides information related to servicing, maintenance, and adjustments.
Detail on how to service the chair and troubleshoot specific problems is presented.
For information on service parts, see the Genuine A-dec Service Parts Catalog or contact
A-dec customer service.
Page 18 85.0816.00 Rev A 2004-11 (PCA 04002.12)
Chair Features A-dec Service Guide, Vol. II
Chair Specifications
Chair Capacity:
Patient Load: 300 lb (135 kg) maximum
Accessory Load: 250 lb (113 kg) maximum
Specifications are subject to change without notice.
NOTE: Ensure the chair is bolted to the floor after installation.
Power On/Off Button
The power On/Off button is located on the base of the chair, and is the main disconnect that completely shuts down the dental unit. When the
button is pressed in, power is on. When the button is out, power is off.
Limp-Along Feature
If there is an electronic feature problem or malfunction, the limp-along feature allows the operator to move the chair in the up direction, for one
second intervals by pushing the manual control buttons on the touchpad or footswitch.This feature is enabled when there is a problem with the
automatic position sensing system and allows the operator to position the chair.
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A-dec Service Guide, Vol. II Chair Covers
How to Remove/Install Chair Covers
The A-dec 511 chair motor pump, lift arm, and stop plate covers should be removed in the following order.
Motor Pump Cover
Remove -Remove screw from each side and lift up.
Install - Replace cover,and attach with two screws.
Lift Arm Cover
Remove -Pull one side of the cover until it releases from the lift arm.
Install - Align one side of the cover with the lift arm and snap into place.
Ensure both sides are firmly attached.
Stop Plate
Remove -Pull one side of the cover until it releases from the lift arm.
Install - Slide one side of the cover over the post on the lift arm and attach.
Swivel Cover
Remove -Pull one side of the cover and pull off.
Install - Align the cover with the holes on one side and snap cover into
place by applying pressure to the center of the cover.
Item #
Part Number
Description
1
62.0080.00
Motor pump cover
2
62.0081.00
Lift arm cover
3
62.0084.00
Stop plate cover
4
62.0122.00
Swivel cover
5
62.0101.00
Motor pump cover plug
4
3
2
5
1
Figure 13. A-dec 511 chair covers.
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Flow Diagram A-dec Service Guide, Vol. II
Chair Flow Diagram
This flow diagram details both electrical and plumbing information for servicing and troubleshooting the A-dec 511 chair. It is located on the
motor pump cover.This diagram includes the air electric switch,motor pump connections, and potentiometers.
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Air electric switch connects the
power supply to pilot air.
Chair Flow Diagram
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Chair Circuit Board A-dec Service Guide, Vol. II
How to Identify the Chair Circuit Board Components
(P/N 90.1072.00)
The chair circuit board contains the relays necessary for controlling the chair’s motor
pump and solenoids.The chair circuit board is equipped with test points that allow
manual chair operation without a footswitch or a touchpad.
The chair circuit board is located on the power supply.To access the circuit board,
remove the pump cover. Use the LEDs located on the circuit board to determine if the
chair is functioning correctly.
Item # Description
1
P7, P8, P9 - Data line ports
2
DS4 - Stop switch LED (limit switch) and
P10 connector
3
DS5 - Back potentiometer LED and P1 connector
4
DS6 - Base potentiometer LED and P2 connector
5
P5 - Footswitch connector
6
P3 - Test points
7
DS12 - Base down LED and relay
8
DS11 - Base up LED and relay
9
DS10 - Back down LED and relay
10
DS9 - Back up LED and relay
11
DS1 - AC power LED
12
DS2 - Status LED
13
DS3 - Data LED
14
DS13 - Chair lockout LED and terminal strip J1
15
J2 - Ø VAC terminal strip (output)
16
J2 - 24 VAC terminal strip (output)
17
P4 - Input power and dental light connector
18
J3 - Vacuum relay output terminal strip
19
P11 - Pump motor and solenoid connector
20
DS8 - Dental light relay
21
DS7 - Dental light relay
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A-dec Service Guide, Vol. II Chair Circuit Board
Figure 14. A-dec 511 chair circuit board components.
1
11
12
13
14
4
3
5
6
7
8
9
10
21
18
16
15
17
20
2
19
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