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