Nidek Medical CP-690 User manual

MCP7**RDA001B/E
TotalPage70
2006.7
NIDEK
AUTOMATIC CHART PROJECTOR
Model CP-690
SERVICE MANUAL

* Specifications are subject to change without notice for improvement.
NIDEK CO., LTD. : 34-14, Maehama, Hiroishi-cho, Gamagori, Aichi 443-0038, Japan
(Manufacturer) Telephone: [phone]
Facsimile: (0533)
NIDEK CO., LTD : 3F Sumitomo Fudosan Hongo Bldg., 3-22-5, Hongo, Bunkyo-Ku, Tokyo 113-0033,
(Tokyo Office) Japan
Telephone: [phone]
Facsimile: (81-3) 5844-2642
NIDEK INCORPORATED : 47651 Westinghouse Drive Fremont, California 94539, U. S. A.
(United States Agent) Telephone: [phone]
Facsimile: [phone]
NIDEK SOCIETE ANONYME : Europarc 13, rue Auguste Perret, 94042 CRETEIL, France
(Authorized Representative) Telephone: [phone]
Facsimile: (01) 49 80 32 08

I
T
Ta ab bl le e o of f C Co on nt te en nt ts s
§
1 INTRODUCTION.........................................................................................................1-1
§
2 CAUTIONS ...................................................................................................................2-1
§
3 TROUBLESHOOTING ...............................................................................................3-1
§
4 SUB TROUBLESHOOTING ......................................................................................4-1
4.1 The Initialization does not Start................................................................................4-1
4.2 The Motor does not Work.........................................................................................4-2
4.3 The Motors do not Stop. ...........................................................................................4-3
4.4 The Projection Lamp does not Go On. .....................................................................4-4
4.5 The Chart Image is Partly Blocked...........................................................................4-5
4.6 The Chart Brightness is Unsuitable. .........................................................................4-6
4.7 The Chart Brightness is Uneven. ..............................................................................4-8
4.8 The Chart Image is not Clear....................................................................................4-9
4.9 The Chart Image does not Change as Operated by the Remote Control. ...............4-10
4.10 The Polarized Chart does not Disappear...............................................................4-11
4.11 The LED does not Go On. ....................................................................................4-12
§
5REPLACEMENT .........................................................................................................5-1
5.1 How to Remove the Covers ......................................................................................5-1
5.2 Replacement of the Circuit Boards ...........................................................................5-3
5.2.1 Replacement of the BA01 board......................................................................5-3
5.2.2 Replacement of the BA02 board......................................................................5-4
5.2.3 Replacement of the BA14 board......................................................................5-4
5.3 Replacement of the Sensors......................................................................................5-5
5.3.1 Replacement of the chart sensor ......................................................................5-5
5.3.2 Replacement of the mask sensor......................................................................5-6
5.4 Replacement of the Chart Motor...............................................................................5-7
5.5 Replacement of the Chart ASSY ..............................................................................5-9
5.6 Replacement of the Mask Motor and Mask ASSY.................................................5-11
5.7 Replacement of the Bottom Cover ASSY (Power LED)........................................5-13
5.8 Replacement of the Power Switch ..........................................................................5-13
Page

II
5.9 Replacement of the Power Transformer................................................................. 5-14
5.10 Replacement of the LED ASSY/C lens ASSY..................................................... 5-15
5.11 Replacement of the Holder ASSY........................................................................ 5-17
5.12 Replacement of the Fuses ..................................................................................... 5-18
5.13 Cleaning................................................................................................................ 5-19
5.13.1 Cleaning of the chart and mask ................................................................... 5-19
5.13.2 Cleaning of the condenser lens.................................................................... 5-20
5.13.3 Cleaning of the holder ASSY ...................................................................... 5-21
§
6ADJUSTEMENT .......................................................................................................... 6-1
6.1 Adjustment of the Initialized Position ...................................................................... 6-1
6.2 Adjustment of the Sensor Voltage............................................................................ 6-2
6.3 Adjustment of the Lamp (LED) Position ................................................................. 6-3
6.4 Adjustment of the Fixed Mask Position ................................................................... 6-4
6.5 Adjustment of the Chart and Mask Positions ........................................................... 6-5
6.6 Setting....................................................................................................................... 6-6
6.6.1 Setting of the voltage selector ......................................................................... 6-6
6.6.2 To display or not display the visual acuity...................................................... 6-7
6.6.3 Selecting the amount of chart light.................................................................. 6-8
6.6.4 Setting of the beep sound volume (Response sound)...................................... 6-8
6.6.5 Setting of the DIP switch................................................................................. 6-9
§
7INFORMATION .......................................................................................................... 7-1
7.1 Wiring Diagram........................................................................................................ 7-1
7.2 How to Carry Out the Wiring ................................................................................... 7-5
§
8LIST OF REPLACEABLE PARTS ......................................................................... 8-1
§
9TOOLS AND MEASURING DEVICES .................................................................... 9-1
Page

I
NTRODUCTIO
N
§
1
This service manual provides information for after-sales service of the NIDEK Automatic Chart
Projector Model CP-690.
For proper after-sales service, it is necessary to understand this manual thoroughly before
servicing.
Refer to “CP-690 Operator’s manual”.
Specifications are subject to change without notice for improvement. As for important changes,
refer to Technical Bulletins.
In case the instrument cannot be repaired by procedures described in this manual, please tell us
the serial number of the instrument and details of the symptom or symptoms.

1-2

CAUTIONS
§
2
<Before service>
• Only service personnel, who are used to handling tools and are familiar with this instrument,
can perform the servicing.
• Perform all servicing according to the procedures described in this manual. Failure to do so
may cause unexpected accident or malfunction.
• Be sure to turn the power off during servicing unless there is an instruction to turn it on.
• Do not perform servicing with wet hands. Doing so could cause electric shock or
malfunction.
<During service>
• If malfunction occurs, check the symptom and turn the power off.
• Once the lamp goes on, its surroundings become hot. Do not touch parts near the lamp while
it is lit or just after the light goes off.
• When handling circuit boards, be sure to touch only parts indicated in this manual. If not, an
electric shock or a failure may be caused.
• If the CP-690 produces smoke or strange odors, immediately turn off the system and
disconnect the electrical plug from the outlet. Usage of the system under such abnormal
conditions may cause fire or electric shock.
• Do not lose or drop the screws, parts, etc. inside the instrument.
As for the parts which are easy to lose, prepare a case beforehand and store the parts in it.
• Apply a threadlocking adhesive to the screws which have been loosened and tightened again.
• The following words are used in §4 SUB TROUBLESHOOTING.
– Power voltage check –
1) Plug the power cord and turn the power switch ON.
2) Measure the voltage of the confirmed points with a tester (selecting voltage).
– Continuity check –
1) Turn the power switch OFF and unplug the power cord.
2) Measure the resistance of the confirmed points with the tester (selecting resistance).
– Cable check (Check of poor contact) –
1) Turn the power switch OFF and unplug the power cord.
2) Check that the connectors are inserted correctly. (Refer to §7 WIRING DIAGRAM.)
3) Reconnect the connectors and then check that there are no poor contacts in the connectors.
4) Measure the resistance of the confirmed points in a broken cable with the tester (selecting
resistance).

2 - 2

TROUBLESHOOTING
§
3
Does the LED next to the power switch
go on?
Turn the power switch ON.
N
Does the initialization*1start?
(Do the motors rotate?)
Y
Y
N
Do both chart and mas
k
motors work?
Does the initialization finish?
(Do the motors stop?)
Y
N
Y
Does the projection lamp go on?
N
N
Go to 4.11.
Y
Go to 4.1.
Go to 4.2.
Go to 4.3.
Go to 4.4.
After initialization, is the first projecte
d
chart image blocked by a mask?
Y
Y
Go to 4.5.
N
Is the chart brightness suitable?
N
Go to 4.6.
Is the chart brightness even?
N
Go to 4.7.
Y

3 - 2
*1 The initialization performs the following operations.
1) The chart ASSY rotates and then stops by the sensor.
2) The chart ASSY moves little by little to correct its position.
3) The mask ASSY rotates and then stops by the sensor.
4) The mask ASSY moves little by little to correct its position.
5) The projection lamp goes on. The first chart is presented.
End
N
Is the chart image clear?
Y
Does the chart image change as
operated by the remote control?
Y
Does the chart tilt against the mask?
Are there any charts blocked by the
mask?
Y
Y
Go to 4.8.
Go to 4.9.
N
Y
Make fine adjustments of the chart
and mask ASSYs.
(See 6.5.)
N
When looking at the polarized chart
with polarizing glasses, does the chart
image disappear?
N
Go to 4.10.
N
Is the volume of the beep soun
d
(response sound) appropriate?
Y
Y
Adjust the volume of the beep soun
d
(response sound).
(See 6.6.4.)
N

S
UB TROUBLESHOOTIN
G
§
4
4.1 The Initialization does not Start.
Is the working voltage ±10 % of the
rating voltage?
N
Does the power cord have continuity?
Y
Y
Does the power switch have continuity?
(Before checking the continuity, unplug
the power cord from the wall outlet an
d
turn the power switch ON and OFF.)
(See 7.1.)
N
N
Are the fuses blown? Replace the fuses.
(See 5.12.)
N
Use another wall outlet or a voltage
regulator.
Replace the power cord.
Y
Replace the power switch.
(See 5.8.)
Is the setting of the voltage selecto
r
correct?
N
Set the voltage selector again.
(See 6.6.1.)
Y
Y
Is the voltage between the 1st and 3r
d
p
ins of the P1 connector AC 15.6
V
±5 %? (Before measuring the voltage,
disconnect the P1 connector from the
circuit board.)
N
Replace the BA01 board.
(See 5.2.1.)
Replace the transformer.
(See 5.9.)
Y

4 - 2
4.2 The Motor does not Work.
Replace the motor that does not work.
As for the chart motor, see 5.4.
As for the mask motor, see 5.6.
N
Y
When interchanging the connecto
r
p
ositions of the chart and mask motors,
does the working motor change?
Replace the BA01 board.
(See 5.2.1.)

4 - 3
4.3 The Motors do not Stop.
Adjust the voltage of each sensor.
(See 6.2.)
Is the problem corrected?
Replace the sensor whose motor does
not stop.
As for the chart sensor, see 5.3.1.
As for the mask sensor, see 5.3.2.
Is the problem corrected?
Is each voltage between TP1 and TP3
(of the chart sensor) and between TP2
and TP3 (of the mask sensor) on the
BA01 board as follows?
When the shading plate blocks the
light, ..………………… +4.5 to 5 V
When the shading plate does not
block the light, ……… under +0.5 V
Replace the BA01 board.
(See 5.2.1.)
Y
Do the J4 and J6 connectors on the
BA01 board have poor contact?
Reconnect the connectors.
Y
End
N
Replace the BA01 board.
(See 5.2.1.)
N
Y
N
Y
End
N

4 - 4
4.4 The Projection Lamp does not Go On.
N
Is the voltage between the 1st and 2n
d
p
ins of J2 connector on the BA01 boar
d
within DC3.69 to 6.01 V? (when the
setting of SW2 is channel “2”.)
Y
Replace the BA01 board.
(See 5.2.1)
Is the voltage between the 1st and 2n
d
p
ins of the J12 connector on the BA14
b
oard within DC3.69 to 6.01 V? (when
the setting of SW2 is channel 2 an
d
LED cable is not connected.)
Replace the BA14 board.
(See 5.2.3.)
N
Y
Replace the BA01 board.
(See 5.2.1)

4 - 5
4.5 The Chart Image is Partly Blocked.
Are the motors, chart ASSY and mas
k
ASSY fixed securely?
Adjust the initialized position.
(See 6.1.)
N
Adjust the chart and mask positions.
(See 6.5.)
Y
Does the mask (disk) block the chart?
N
Adjust the sensor voltage.
(See 6.2.)
Does the fixed mask block the chart?
Y
N
Adjust the chart and mask positions.
(See 6.5.)
Adjust the position of the fixed mask.
(See 6.4.)
Y
Adjust the initialized position.
(See 6.1.)
Adjust the sensor voltage.
(See 6.2.)
Is the blocked part on the right side o
f
the visual acuity indication or chart? Y
Move the VA mask toward the inside o
f
the instrument (mask motor side).
(See 6.6.2.)
N

4 - 6
4.6 The Chart Brightness is Unsuitable.
Is the setting of the light control switch
(SW2 on the BA01 board) appropriate?
[This switch has five channels; from 1
(most bright) to 5 (darkest).]
* The setting at shipment is “2”.
Set the light control switch to the
appropriate channel.
(See 6.6.3.)
N
Is the working voltage ±10 % of the
rating voltage?
Y
N
Use another wall outlet or a voltage
regulator.
Y
Is there any dust on the condenser lens?
Y
Clean the condenser lens.
(See 5.13.2)
N
Is there any dust on the chart AS?
Y
Clean the chart AS.
(See 5.13.1.)
N
Is there any dust inside the lens barrel?
Y
Clean the projection lens inside the lens
barrel. (See 5.13.3.)
N
Is the setting of the voltage selecto
r
appropriate?
N
Reset the voltage selector.
(See 6.6.1.)
Y

4 - 7
Is the polarizing filter burnt? (is i
t
brown?)
N
Y
Is the polarized chart dark?
N
Is the voltage between the 1st and 2n
d
p
ins of the J2 connector over DC 5 V?
(when the setting of SW2 is channel 2)
Replace the chart ASSY.
(See 5.5.)
N
Replace the transformer.
(See 5.9.)
Y
Y
Replace the screen.
N

4 - 8
4.7 The Chart Brightness is Uneven.
Does the unevenness show up in the
same area of the chart?
Y
Is the C lens ASSY dirty, burnt o
r
scratched?
Y
Adjust the position of the lamp (LED).
Is the chart brightness still uneven?
(See 6.3.)
Replace the screen.
Y
N
N
N
Clean the chart ASSY.
(See 5.13.1.)
Clean the C lens ASSY.
(See 5.13.2.)
If the dirt or burnt area can not be
cleaned, or the ASSY is scratched,
replace it. (See 5.10.)
Is the holder ASSY dirty, burnt o
r
scratched?
Y
Clean the holder ASSY.
(See 5.13.3.)
If the dirt or burnt area can not be
cleaned, or the ASSY is scratched,
replace it. (See 5.11.)
N
End

4 - 9
4.8 The Chart Image is not Clear.
Adjust the focus of the chart. Is the
image still not clear?
(As for the adjustment method, See the
operator’s manual.)
Y
Clean the holder ASSY. Is the image
still not clear?
(See 5.13.3.)
Clean the chart ASSY. Is the image
still not clear?
(See 5.13.1.)
Replace the screen.
N
End
N
End
N
End
Y

4 - 10
4.9 The Chart Image does not Change as Operated by
the Remote Control.
Are the
b
atteries in the remote control
drained?
N
Y
Does the chart image change normally
by cutting the interference light off?
N
Y
Install the instrument apart fro
m
windows or spot lights.
Replace the batteries with new ones.
The settings of the remote control an
d
main body (channel of the remote
control) are correct?
Is the voltage between the 1st pin of the
J7 connector and TP3 DC 5 V ±5 %?
N
Replace the BA01 board.
(See 5.2.1.)
Do the points below have continuity?
BA01 board BA02 board
J7 P7
1st pin ↔1st pin
2nd pin ↔2nd pin
3rd pin ↔3rd pin
Y
N
Replace the BA02 board.
(See 5.2.2.)
Y
Replace the remote control.
N
Make the settings for using several
CP-690 units. (See 6.6.5.)
Y