Marco CP-670 User manual

MARCO
CP-670 AUTOMATIC
CHART PROJECTOR
Instruction Manual

CONTENTS
GENERAL DESCRIPTION. . . . . . . . . . . . . . . 1
INSTALLATION......................2
Mounting the Projector
Positioning the Projector
Positioning the Screen
Correct Letter Size and Focusing
OPERATION........................3
Using the Remote
CARE AND MAINTENANCE . . . . . . . . . . . .
Changing the Bulb
Changing the Fuse
Changing the Batteries
SETTING THE REMOTE CONTROL CODE . .
SPECIFICATIONS ....................5
CHARTSAMPLES ....................5

INTRODUCTION
The Marco CP 670 Automatic Chart Projector is a wireless remote
controlled unit which provides instantaneous selections of 33 of
the most popular ophthalmic charts used. With programmable
random access capability, the instrument enables you to quickly
and easily program pre selected slides and present them in a
sequence most suited to your particular refraction needs.
Superior masking features and red/green filtering over any appro
priate chart also extends the capability of the CP 670. The excel
lent design in both function and style will increase the efficiency
of your examination procedures, provide you with state of the art
technology, and enhance the decor of your office.
GENERAL DESCRIPTION
The CP 670 consists of the main Chart Projector body, wireless
remote control, projection screen, test scale, and dust cover. The
table, unit, and wall mounts are optional accessories sold sepa
rately. Please review the brief descriptions associated with Figure 1
to familiarize yourself with each function.
1- ON/OFF Switch: The green LED next to the main switch will
be illuminated when the main switch is turned on.
2- Infrared Ray Receiving Window: Receives the infrared
signals from the wireless remote control unit.
3- Wireless Remote Control: The hand held remote control
unit permits total operation of the Chart Projector from
anywhere within the examination room. Maximum range is 25
feet from the projector to the screen.
- Top Cover Screw: The top cover screw allows for removal of
the top cover of the Chart Projector for access to the bulb,
focusing and letter size adjustment knobs, and the remote
control code switches.
5- Fuseholder: The fuse is replaced by turning the fuseholder
counterclockwise and removing the blown fuse.
1
1
2
3
4
5
1. ON/OFF Switch
2. Infrared Ray
Receiving Window
3. Wireless Remote
4. Top Cover Screw
5. Fuseholder
Figure 1

2
INSTALLATION
Mounting the Projector
Available options for mounting the CP 670 are a wall, unit, and
table mount. Preferably, the instrument should be mounted at
the same height as the patient’s eyes. If this is not possible, tilt the
instrument slightly so that the projected image on the screen is at
the same height as the patient’s eyes.
Positioning the Projector
Measure the distance from patient to screen (refracting distance)
and mount the Chart Projector within the following projection
distance guidelines:
Refracting Distance Projection Distance
10 feet 10 13 feet
13 feet 13 17 feet
16.4 feet 16 21 feet
20 feet 19 25 feet
To obtain a longer refracting distance in smaller rooms, a mirror
or system of mirrors should be used (Figure 2). A high quality
front surface mirror is recommended to obtain optimal results.
Positioning the Screen (Figure 3)
Hang or hold a small mirror on the screen and tilt or turn the
screen until the projected spot of light is properly directed
towards the patient.
Correct Letter Size and Focus
1. Project the 20/200 N on the screen.
2. As a reference for proper measurements, have someone hold
the distance scale (Figure 4) on the screen and focus the
20/200 N to measure evenly with the respective distance line.
(The scale of 10 to 20 feet refers to the distance from patient to
screen.)
3. To adjust for proper letter size and focus, remove the top cover
by turning the top cover screw 1
/2turn counterclockwise (refer
to figure 5). For image focusing, loosen the focusing knob and
slide the focusing tube forward or backward to obtain proper
focus. The rear adjustment knob controls letter size. Loosen
and slide the knob forward or backward for proper letter size.
When adjustments are completed, tighten both knobs and
replace the top cover.
Screen
Patient
Spot of
light
on wall
Projector
Figure 3
Focusing Knob
Letter Size Control Knob
Mirror
Mirror
Screen
Projector
Patient’s eye
Figure 2
1100’’1111’’1122’’1133’’1144’’1155’’1166’’1177’’1188’’1199’’2200’’
Figure 4
Figure 5

OPERATION
Using the Remote
To effectively operate the CP 670, it will be important that you
understand and familiarize yourself with each function of the
remote control unit. It can be easily operated by aiming it directly
at the screen or by aiming it at the Chart Projector. Please take
plenty of time to accustom yourself to the various selections on
the remote control.
The diagram in Figure 6 and the descriptions listed below explain
each of the available selections.
“Lamp” On/Off Button
The “Lamp” button controls On/Off of the projection lamp from
the remote control. When initially depressed, the 20/ 00E will
automatically be displayed. If the instrument is not operated for
more than 15 minutes, a series of warning “beeps” will sound
and the instrument will automatically shut off in seven seconds. If
a particular chart is needed for more than 15 minutes, depress
that chart button again after you hear the warning beeps.
The shut off timer can be adjusted for a five minute period. Please
refer to Figure 8, Setting the Remote Control Code. When switch
#6 is turned on, the timer is set for 15 minutes; when #6 is off,
the timer is set for five minutes.
Snellen Charts
Eight snellen charts provide selections from 20/400 to 20/10 with
five 20/20 lines. Vertical isolations of the 20/20 chart will also dis
play additional 20/20 lines.
Illiterate E’s
Four illiterate E charts provide selections from 20/100 to 20/15.
Number Charts
Five number charts provide selections from 20/200 to 20/10.
Child Charts
Three child charts provide selections from 20/100 to 20/20.
Vectograph Charts
The CP 670 is supplied with a variety of vectograph or “specialty”
charts including a unique Minute Stereo test chart. When a polar
ized lens is presented to the patient after subjective refinement is
completed, the Minute Stereo test chart is viewed by the patient
in a 3 dimensional pattern with each symbol “floating” in space
beginning with the triangle and following in a clockwise pattern
to the circle, star, and then square. A correct response by the
patient accurately verifies subjective refinement.
Single Character Masking
Depressing the single character masking button will totally
isolate any single character on any acuity chart. To move the iso
lation from side to side, depress the vertical masking buttons. To
move the isolation up or down to another line on the same
chart, depress the horizontal masking buttons.
Vertical Character Masking
Depressing the left vertical masking button will vertically iso
late the far left line on any acuity chart. The right vertical mask-
ing button will vertically isolate the far right line on any chart.
Repeated depressions of these buttons will move the isolation
from side to side. Depressing either horizontal masking button will
allow you to move the vertical isolation up or down the selected
acuity range.
Horizontal Character Masking
Depressing the top horizontal masking button will horizon
tally isolate the top line of any acuity chart. The bottom horizon-
tal masking button will horizontally isolate the bottom line of
any acuity chart. Repeated depressions of either button will allow
you to move up or down the selected acuity range.
Red/Green Filter
In addition to the separate red/green chart provided with the
vectograph charts, the CP 670 also gives you the capability of fil
tering red/green over any appropriate chart with the exception of
the 20/400 and 20/300 charts. Filtering is also possible with all
illiterate E charts, and all child charts.
Program Buttons
The program buttons allow you to pre program three separate
examination sequences. All charts are capable of program stor
age as well as a "masked" chart selection.
To program and operate a personal selection of charts:
1. Depress the Lamp Button on the remote control to turn the
unit off.
2. Select the desired program button, A, B, or C, and hold for
five seconds. The instrument will "beep" and will immediately
display the fixation dot.
3
Figure 6
Special
Tests
Program
Functions
Red/Green
Filter
Illiterate E
Snellen
Charts
Children’s
Snellen
Charts
Movable
Masking
Options
(Vertical,
Horizontal,
Single
Character)
Alphabet
Snellen
Charts
Number
Charts

3. Select the chart you wish to program immediately followed by
the NEXT chart. The instrument will "beep", recognizing your
selection.
4. After programming is completed, depress the previously
selected program button (A, B, or C) to store your selections
into memory. The instrument will "beep", indicating storage,
and will automatically display the 20/ 00 E. To start your
sequence of charts, depress the START (A) button. To for
ward through your program, depress the NEXT button. The
instrument will "beep" at the end of your program sequence.
CARE AND MAINTENANCE
Changing the Bulb (Figure 7)
1. Turn the main power switch off, and unplug the power cord.
2. Remove the top cover by turning the top cover screw 1
/2
turn counterclockwise.
3. Loosen the small knurled lamp cover screw and open the
lamp cover.
4. Remove the old bulb and replace with an identical bulb.
NOTE: The CP-670 uses a halogen bulb. Please avoid
touching the bulb directly with your fingers. This may
shorten its lifespan.
5. Secure the lamp cover, plug the instrument back in, and turn
the main power switch on.
6. If necessary, adjust the bulb position as needed by turning the
lamp holder adjustment screws.
7. Replace the top cover.
Warning: Re lace with Marco 6 volt, 20 watt
bulb only. Re lacement with any
other ty e bulb will cause major
damage and void warranty.
Changing the Fuse
Two fuse holders are located on the bottom of the CP 670. To
replace a blown fuse, unplug the power cord from the wall and
carefully turn the instrument over. Push the fuseholder in and
turn counterclockwise. Replace with an identical fuse and reinstall
the fuseholder.
Changing the Batteries
To change the batteries in the remote control, press the tab down
located on the back of the remote and pull the latch open.
Replace with two fresh AA batteries.
NOTE: When not in use for an extended period of time,
please remove the batteries.
SETTING THE REMOTE CONTROL
CODE Figure 8)
If more than one Chart Projector is used in the same exam ination
area, the remote control code for each unit should be changed
to avoid mis operation. Four different codes are available.
1. Remove the top cover of the chart projector.
2. Located directly on top of the PC board is a computer chip with
six small switches for the remote control code of the main body.
The standard setting from the factory is shown in Figure 8.
NOTE: Do not change positions of switches 3 through 5.
3. The codes for the remote control are set by the two small "tab"
switches located inside the square slot directly above the
battery box. Remove the back cover of the remote control to
expose these switches.
4. The diagram in Figure 8 illustrates the four different setting
codes for the switches of the main body and the code
switches for the remote control unit. Please refer to this
diagram when setting individual codes for the CP 670.
4
Lamp Cover Lamp
Lamp Cover Screw
3 Lamp Holder
Adjustment Screws
Figure 7
12
Off
3456
Standard Setting
from factory.
➡➡
➡
➡
➡➡
➡ ➡
Figure 8

5
CHART SAMPLES A Fixation Chart is included, ut not shown.
★
Snellen 400
Snellen 20–15–10 Snellen 20–20–20 Snellen 25–20–20 Illiterate E 100–80 Illiterate E 70–60–50
Illiterate E 40–30–25 Illiterate E 20–20–15 Children’s 100 Children’s 80–60 Children’s 40–30–20
Num er 200–150 Num er 100–80 Num er 70–60–50 Num er 40–30–25 Num er 20–15–10
Red/Green with
Letters
Cross Cylinder Dots Vertical Letters Horizontal Letters Binocular Balance
Astigmatic Clock Dial Phoria Phoria with Fixation
Muscle Balance Test
Minute Stereo Test Coincidence Vertical
Schematic Eye Worth Test
Snellen 200–150 Snellen 100–80 Snellen 70–60–50 Snellen 40–30–25
SPECIFICATIONS
Chart: 33 pcs.
Projection distance: 9.5 to 20 ft. (16.4 ft. is standard)
Projection
magnification: 25X (at 16.4 ft.)
Projection size: 9.84 x 8.85 in. and 10.83 in. diameter
Tilt angle: ±10°
Lamp: 6V 20W (Halogen), 2,000 hrs. lifetime
Power source: AC 100, 120, 220 and 240V, 50/60Hz
Power consumption: 50VA
Dimensions - Main body: 11.02 (H) x 8.26 (W) x 13.48 (D) in.
Control unit: 0.70 (H) x 2.51 (W) x 6.88 (D) in.
Weight - Main body: 15.4 lbs.
Control unit: .98 lbs
Finish - Main body: White grey
Control unit: White grey
Accessories: 1 each of dust cover, screen, test
scale, wrench, and 2 spare fuses.
Optional accessories: Wall mount bracket, desk mount,
unit mount.

A division of Marco O hthalmic, Inc. •11825 Central Parkway •Jacksonville, FL 32224-2 37
904- 42-9330 •US/Canada Toll-free: 1-800-874-5274 •Fax: [phone] •www.marcooph.com G002000
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