A-dec Dental Lights User manual

85.0812.00, 2003 LI-1

Dental Lights Overview

This section presents the Pre-Cascade and Cascade dental lights and their specifications.
Detail on how to service and adjust lights and troubleshoot specific problems is presented.
For more information on service parts, see the Genuine A-dec Service Parts Catalog or contact
customer service.

If you are looking for information about the Performer dental light, please see Performer (PR).

85.0812.00, 2003

Dental Lights Serial/Model Number Label

Locating Model/
Serial Number and
Circuit Breakers

Unit Mount and Radius Lights

Model/serial number
tag (bottom of post
after June 1998)

Model/serial number tag
(under cover before June 1998)

Track Light

Model/serial number tag
(on back of cover)

Circuit breakers

Ceiling Light

Wall Mount

Model/serial number
tag (on top of cover)

Model/serial number
tag (on top of cover)

Circuit breaker

Circuit breaker
(hidden)

Preference

Post Mount

Model/serial number
tag (at base of arm)

Circuit breaker(s)

Model/serial number tag
(on bottom of cover)

Circuit breaker

The model/serial number tags identify the light model and manufacture date. If you have
difficulty locating the model/serial number or circuit breaker locations on the lights,
the following examples may be helpful. The circuit breakers automatically interrupt the flow of
electricity to the light if an over-current condition occurs.

NOTE:Circuit breakers (post June

1998) and fuses (before
June 1998) are located in
the power supply.

LI-2

®

85.0812.00, 2003 LI-3

Dental Lights Manufacture Dates

Serial/Model Number Label

Reading
Manufacture Dates

1

1

1

2

2

2

Item # Description

1 Month of manufacture

The first letter of the serial number indicates the month
the product was manufactured; e.g., A is January.

2 Last digit of the year manufactured, e.g., 7 is 1997

Different versions of the light can be distinguished by month and year manufactured. This
information is included in the serial number of each dental light.

The following examples show how to identify the month and year in which a light was manufactured.

85.0812.00, 2003 LI-4

Dental Lights Cascade Light Head

Item # Part Number Description

1 28.1004.00 Bulb and holder

2 041.179.01 Bulb

3 90.0463.01 Lamp socket kit

4 28.1012.00 Bracket assembly (2 required)

5 28.0679.01 Pivot stop

6 90.1043.00 Intensity switch kit

7 90.1039.00 On/Off switch kit

8 28.1464.01 Switch housing kit

Cascade Light Head

6
A

1
2
5

V
A

C

3

A
2

50
V

A

C
O
N

O
N

O

N

Cascade Light Head

1

5

2

3

Cascade Light Head

4

6

7

8

6
A

1
2
5

V
A

C

3

A
2

5
0
V

A

C
O
N

O
N

O

N

85.0812.00, 2003 LI-5

Dental Lights Cascade

After September 1998

Before September 1998

Identifying Intensity
Switch Connections

(Cascade)

Blue

Violet

White

Low

High

Medium

Green

Blue

(15-16vac)

Violet

(16-17vac)

Green

(14-15vac)

White

Jumper wire

Red

Wht

Blk

Low

High

Medium

Brn

Red

(15-16vac)

White

(16-17vac)

Brown

(14-15vac)

Black

Jumper
wire

The three-position intensity switch is used to set light intensity at one of three settings: low,
medium, or high. The replacement kit for the intensity switch is P/N 90.1043.00.

The following illustrations identify the connections for attaching appropriate wires from the
intensity switch to the dental light.

Jumper
wire

Jumper
wire

85.0812.00, 2003

LI-6

Dental Lights Cascade Wiring Diagrams

After September 1998

Wiring Transformer,

(110-120 VAC, 240 VAC)

Transformer

Before September 1998

Transformer

NOTE: The power transformer had lower output voltages and no “1 VAC” tap before January 1989.

The transformer converts incoming source power to the correct voltage to power the dental light
head. The wiring diagram shows the wiring changes for the transformers.

17 VAC

16 VAC

15 VAC

1 VAC

0 VAC

17 VAC

16 VAC

15 VAC

1 VAC

0 VAC

85.0812.00, 2003 LI-7

Dental Lights Cascade Wiring Diagram

Wall-Mount, Single/Dual
Track, Preference, and
Ceiling-Mounted Lights

NOTE:Voltages shown are assuming 120/240 VAC. Secondary voltages

measured without the lamp inserted will register 1.2 VAC higher.

After September 1998

(Wht in Pref)

(Blk in

Pref)

(Grn in
Pref)

Transformer

Transformer

To
power
source

To circuit breaker

To light head

To circuit
breaker

To light head

Wall-mounted and
Preference-mounted lights

Wall-mounted and
Preference-mounted lights

Dual track light (optional)

17 VAC
16 VAC
15 VAC

1 VAC (not used)

0 VAC

17 VAC
16 VAC
15 VAC

0 VAC

1 VAC (not used)

85.0812.00, 2003 LI-8

Dental Lights Cascade Wiring Diagram

Wall-Mount, Single/Dual
Track and Preference
Mounted Lights

NOTE:Voltages shown are assuming 120/240 VAC. Secondary voltages

measured without the lamp inserted will register 1.2 VAC higher.

January 1989 to September 1998

Transformer

Transformer

To
power
source

To circuit
breaker

Wall-mounted and
Preference-mounted lights

Wall-mounted and
Preference-mounted lights

17 VAC
16 VAC
15 VAC

1 VAC (not used)

0 VAC

(Wht in Pref)

(Blk in Pref)

(Grn in

Pref)

17 VAC
16 VAC

15 VAC
1 VAC (not used)
0 VAC To circuit breaker

To light head

To light head

85.0812.00, 2003 LI-9

Dental Lights Cascade Wiring Diagram

Cascade Unit and
Radius-Mounted Lights

NOTE:Voltages shown are assuming 120/240 VAC. Secondary voltages

measured without the lamp inserted will register 1.2 VAC higher.

After May 1998

300-watt
power supply

Lower cable
assembly

Upper cable
assembly

Lamp

(17VAC)

(16VAC)

(15VAC)

Red 6-pin
connector

Intensity
switch

On/Off
switch

85.0812.00, 2003 LI-10

Dental Lights Cascade Wiring Diagram

F10

DENTAL LIGHT

10A TIME DELAY

F8

BLK

BRN

RED

ORA

YEL

15V

17V

RETURN

16V

T4

DENTAL

LIGHT

BLK/

RETURN

CONTROL

HEAD

AUXILIARY

H5

300W before May 1998

BRN REDORA YELBLUWHI WHI/RD

BRN

ORA

0 VOLT

F3

F2

MADE IN USA

T1 DENTAL

LIGHT

BLK

BRN

RED

WHI

0 V

15 V

16 V

17 V

6V FUSE

5A 250V SB

A-DEC 41-1224-00

REV B

TO DECREASE LIGHT

BRIGHTNESS, PLACE

FUSE IN 1 VOLT SLOT

F1 10A 32V SB

150W before May 1998

Cascade Unit and
Radius-Mounted Lights

NOTE:Voltages shown are assuming 120/240 VAC. Secondary voltages

measured without the lamp inserted will register 1.2 VAC higher.

Grn/Yel

0 Volts

15 Volts

16 Volts

17 Volts

Ground

0 Volts

15 Volts

16 Volts

17 Volts

Ground

Grn/Yel

1 VOLT

85.0812.00, 2003 LI-11

Dental Lights Pre-Cascade

March 1985 to October 1987

2

3

4

5

October 1987 to February 1994

1

3

4

5

Item # Part Number Description

1 28.0704.00 Bulb with holder

2 041.179.01 Bulb

3 90.0463.01 Lamp socket kit

4 28.0545.01 Pivot stop

5 90.0372.00 Light switch service kit

6 28.1012.00 Lens bracket assembly

(2 required)

Pre-Cascade Lights

85.0812.00, 2003

Dental Lights Pre-Cascade

LI-12

Blue

Brown

Black

Low

High

Medium

Orange

Blue

(15-16vac)

Violet

(16-17vac)

Green

(14-15vac)

White

Jumper

Jumper

Identifying Intensity
Switch Connections

(Pre-Cascade)

The illustration identifies the intensity switch connections for Pre-Cascade units.

85.0812.00, 2003

Dental Lights Pre-Cascade Wiring Diagram

LI-13

Wall-Mount, Single/Dual
Track and Preference­Mounted Lights

NOTE:Voltages shown are assuming 120/240 VAC. Secondary voltages measured

without the lamp inserted will register 1.2 VAC higher.

Before January 1989

Transformer

Transformer

To
power
source

To circuit breaker

To light head

To circuit breaker

To light head

(Grn in Pref)

17 VAC

15 VAC

17 VAC
16 VAC
15 VAC

1 VAC (not used)

0 VAC

1 VAC (not used)

0 VAC

16 VAC

85.0812.00, 2003

Dental Lights Pre-Cascade Wiring Diagram

LI-14

Post, Ceiling, and
Excellence-Mounted Lights

Before January 1989

To power source

Transformer

To light
head

To circuit
breaker

(not
used)

85.0812.00, 2003

Dental Lights Adjustments

LI-15

Adjusting
Diagonal and
Horizontal Tension

Adjusting Vertical
Tension

Focusing the
Light

To adjust diagonal movement, use a 5/32" hex key to turn the
adjustment screw at the bottom of the switch housing. Eliminate
all movement in the diagonal axis by tightening the screw until
it stops.

To adjust horizontal movement, use a 5/32" hex key to turn the
adjustment screw at the top of the switch housing.

To adjust vertical movement, use a 5/64" hex key to loosen the
setscrew on the right side of the light head. Remove the end cap.
Use a large flat-blade screwdriver to turn the adjustment screw
under the end cap. If the light head moves too easily, or tends to
drift out of position, increase the tension by turning the screw
clockwise. When the desired tension is achieved, reinstall the end
cap and retighten the setscrew.

The focus of the light is adjusted at the factory for proper
illumination at 27" from the oral cavity. If the light requires
focusing to suit the user’s style of practice, place a white towel
over the chair headrest and position the light at the distance from
the towel required by the user. Using a large screwdriver or coin,
turn the focus adjusting screw until the light pattern is uniform
in brightness without shadowing. The range of adjustment is
18" to 31".

Diagonal
adjustment
screw

Diagonal adjustment screw

Horizontal
adjustment
screw

End cap

5/64" hex key

Focus
adjustment
screw

Standard
screwdriver

85.0812.00, 2003

Dental Lights Adjustments

LI-16

Adjusting the
Flexarm

Adjusting Flexarm
Travel (Limit Up)

Adjusting Flexarm
Travel

(Limit Down)

Remove the screw from the rear end cap, then remove the front
end cap and cover from the arm. Using a 1/2" open end
wrench, turn the tension adjustment nut inside the arm. If the
arm moves too easily, or tends to drift up or down by itself,
tighten the nut by turning it clockwise. If the arm tension is
too stiff, loosen the nut by turning it counterclockwise.

The upward motion of the flexarm can be adjusted by adding a
Travel Stop Limit Kit (P/N 90.1044.00). To order this kit, contact
A-dec customer service at 1-800-547-1883.

The downward motion of the flexarm can be adjusted by
adding a Travel Stop Limit Kit (P/N 90.1044.00). To order this
kit, contact A-dec customer service at 1-800-547-1883.

85.0812.00, 2003 LI-19

Dental Lights Troubleshooting

Tips and troubleshooting information are listed in the following charts to assist in diagnosing
dental light problems. These charts are not intended to cover every situation, but do include the
most common problems you may encounter.

Troubleshooting
Dental Lights

Problem

Action

Light head is sloppy or
difficult to position

Flexarm drifts

Track light trolley drifts

Track trolley light bounces back
when pushed to the end of
the track

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

Adjust the appropriate axis tension.

Adjust the flexarm counterbalance.

Using shims, level the track light ceiling pallet.

Check power cable in track for proper routing.

Follow these steps.

Task Description

1 Clean the reflector and shield.

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

3 Replace the lamp if discolored.

85.0812.00, 2003

Dental Lights Troubleshooting

LI-20

Problem

Action

Unsatisfactory light pattern

Light does not function

Follow these steps to determine the problem.

Task Description

1 Focus the light

2 Clean the reflector and shield.

3Check the shield for abrasions and replace if necessary.

Use these points to determine why the light doesn’t work.

If . . .

Then . . .

No power to the light

Defective socket

Lamp has failed

Measure the voltage at the socket.

Replace the lamp.

Blown fuse or tripped circuit breaker

Check to see if fuse has blown or circuit
breaker has tripped.

No power to the transformer

Check for loose connections at
the transformer.

Measure the transformer output voltages.

Check to make sure the dental light is
connected to a working source of power.

Check to make sure all electrical switches
are in the ON position and the input
voltage selector switch is set properly.

Make sure the power supply air-electric
switch has sufficient air pressure to close.

85.0812.00, 2003 LI-21

Dental Lights Troubleshooting

Problem

Action

One or more intensity
positions do not function

Use these points to identify and correct intensity.

If . . .

Then . . .

Transformer not supplying one or
more voltages

No power to the intensity switch

No power to the On/Off switch to
the lamp, and no voltage measured
at the On/Off switch to the lamp

Check for loose connections at
the transformer.

Measure the transformer output voltages.

Measure the voltages at the
intensity switch.

Replace intensity and On/Off switch.
Measure the transformer output voltages.

No power to the On/Off switch to
the lamp, and a voltage is measured
at the On/Off switch to the lamp

Replace the socket.

85.0812.00, 2003 LI-22

Dental Lights Notes

85.0812.00, 2003 LI-23

Dental Lights Notes

85.0812.00, 2003 LI-24

Dental Lights Notes