A-Dec 200 Service guide (2014)
Service Guide
A-dec 200
Copyright
Regulatory Information
© 2014 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 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 identication
• Software revisions
• Warranty statement
• Deluxe touchpad help messages
• Intended application and use statements
• Identication of symbols
• Environmental specications
• Classication 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 Cupll and Bowl Rinse ...................................................23
Standard Cuspidor (no touchpad) ...............................................23
Cuspidor with Optional Touchpad ...............................................23
Customize Cupll 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 Cupll 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 Specications .........................................................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 Identication ..................................................................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
86.0016.00 Rev C 3
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.
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.
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
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
86.0016.00 Rev C 7
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
86.0016.00 Rev C 9
A-dec 200 Service Guide Dental Chair | 10
Circuit Board Components
T able 2. LED Identication
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
86.0016.00 Rev C 11
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
• Veries 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.
86.0016.00 Rev C 13
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.
86.0016.00 Rev C 15
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
86.0016.00 Rev C 17
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 conrming the button has been set.
Loading...