Olympus CX-31, CX-41 Service manual

Maintenance Manual

for maintenance engineer

CX31/41

Thank you for purchasing the Olympus microscope CX31/41.
In order to fully utilize its performance and secure optimum condition, please read this manual before
maintenance work.
Please also keep it at hand during maintenance as well as for future reference.

All rights reserved, Reproduction in whole or in part without written permission is prohibited.

CX31/41 MAINTENANCE MANUAL

INTRODUCTION

The purpose of this manual is to satisfy any requirements for maintenance material that maybe
considered as necessary to professionals in the maintenance field, such as Maintenance engineer
in Hospitals.
It is intended to be used as a tool for performing basic maintenance procedures if needed or when
required as per the recommended maintenance schedule.

The sections from this manual only cover procedure pertaining maintenance ’s that are considered
to be easily performed. For more involved maintenance’s or repairs, it is recommended that you
contact a qualified service engineer from your local Authorized Olympus dealer.

Maintenance parts, grease, and other items specified in the manual can be ordered from your
Authorized Olympus dealer, and subject to change without notice.

The recommended maintenance schedule is shown below as reference. ( * Necessary item)

Portion Cleaning Optical/mechanical check Maintenance schedule

Optical components

1) Outer surface
Eyepiece, objective ,
condenser lens, filter,
photo eyepiece

2) Inner part Prism,
internal lenses

Appearance

Microscope frame,
mechanical part

Observation tube

Mechanical part

Focusing unit, stage,
revolving nosepiece,
aperture/field iris
diaphragm

*

*

*

*

Optical adjustment :

1) Optical axis (standard)

2) Left/right optical axis

3) Revolving axis

4) Parfocality
*

Mechanical movement :

Grease replacement
Mechanical adjustment

Once in a year
(If dirt is conspicuous or oil
immersion objec tive is used,
cleaning should be made after
every use.)

Once in a year

Once in a year
(If dirt is conspicuous, cleaning
should be made after every
use.)
Once in a year

Once in two to three years

CX31/41 MAINTENANCE MANUAL

CONTENTS

CHAPTER 1 MAINTENANCE PROCEDU RE........................................................................ 1

1. Maintenance of Microscope............................................................................................ 1

2. Guide to Maintenance.................................................................................................... 2

2-1 Overview of maintenance....................................................................................... 2

2-2 Cleaning method for the optical components.......................................................... 3

3. Preparing for Inspection................................................................................................. 6

4. CX31/41 Inspection Sheet.............................................................................................. 7

CHAPTER 2 INSPECTION PROCEDURE............................................................................. 8

1. Checking Performance of Microscope............................................................................ 8

2. Checking Dirty Portion.................................................................................................... 8

2-1 Image influence caused by dirt on each component............................................... 8

2-2 How to find dirty portion through observation.......................................................... 9

2-3 How to check cleaning condition ..........................................................................10

CHAPTER 3 REPAIR PROCEDURE.....................................................................................11

1. Optical Adjustment ........................................................................................................11

2. Mechanical Adjustment................................................................................................. 14

2-1 Preparation for the tension adjustment of Y-wire................................................... 14

2-2 Adjustment method for the tension of Y-wire......................................................... 15

2-3 Confirmation of the Y-wire tension ........................................................................15

2-4 Final adjustment................................................................................................... 16

3. Replacing Grease for Fine Focus Adjustment Knob Ass’y............................................. 17

4. Electrical Adjustment.................................................................................................... 18

4-1 CX31/41 wiring diagram ....................................................................................... 18

4-2 Replacing circuit board / rheostat ass’y ................................................................18

4-3 Preparation ..........................................................................................................19

4-4 Voltage adjustments............................................................................................. 19

CHAPTER 4 JIGS AND TOOLS / GREASES AND ADHESIVES .......................................20

1. List of Jigs and Tools.................................................................................................... 20

2. List of Greases............................................................................................................. 20

3. List of Adhesives.......................................................................................................... 20

CHAPTER 5 MAINTENANCE PARTS................................................................................. 21

1. List of Maintenance Parts............................................................................................. 21

CX31/41 MAINTENANCE MANUAL MAINTENANCE PROCEDURE

CHAPTER 1

MAINTENANCE PROCEDURE

1. Maintenance of Microscope

1) Fundamental handling

a. Read the instruction manual thoroughly, handle the microscope correctly.
b. Be sure to make a usual cleaning, especially after every use of microscope.
c. When handling the microscope, do not expose it to shock, moisture, heat and dust.
d. If the problem occurs, do not treat it in self-judgement.

2) Using and storing conditions

a. The microscope should be used under no vibration.

If it is placed in such environment as vibration, this causes disturbance and fatigue in
observation and affects the photomicrography.

b. It should not be stored in high humidity.

Such condition causes fungus, corrosion on lens and rust on metal part.
Therefore, special caution is exercised if stored in a long period of time.

c. Intense temperature change should be avoided.

Be careful not to place the microscope near window exposed to direct sunlight and air
conditioner. When bringing it into warm room from cold storage location in winter,
condensation occurs on lens and metal part, it causes fungus and rust.

d. It should be kept clean.

The microscope is required to keep away from dust that causes contamination, fungus
on lens and failure of sliding part in the frame.
Be careful not to place it in the environment where the corrodent chemicals such as
hydrogen sulfide, hydrogen fluoride and acid are handled.

<Reference> fungus: occurrence conditions

Temperature

Dry blue aspergillus

Degree(C)

40

30

Humidity

%

60 70

- 1 -

Aspergillus

80

20

10

90

100

CX31/41 MAINTENANCE MANUAL MAINTENANCE PROCEDURE

with the soft brush. If there are stains on

lens

2. Guide to Maintenance

2-1 Overview of maintenance

1)

3 4

5

2

6

1

Set your correct interpupillary distance.
Note any areas suggesting a need for
mechanical and/or optical maintenance
by operating it or observing a specimen.

4)

4

3

5

Plastic part

2

6

1

2)

3 4

5

2

6

1

Sweep off dust on the outer surfaces
the microscope frame, clean them with

neutral detergent.

5)

3)

3 4

5

2

6

*removed
if necessary

1

*Attachment

Remove the optical components and
the specimen holder. (The attachment
lens is removed from the condenser
with the condenser turned upside
down.)

6)

4

3

5

2

1

6

plastic part

Wipe off any dirt spots on the surface of
lenses, filter, glass and stage. The
plastic parts should be cleaned with
neutral detergent.

7)

3 4

5

2

6

1

Polish all plastic components and the
frame with silicon cloth.

Tool required:

Clean all exposed optics such as lenses
of eyepieces and objectives.

8)

3 4

5

2

6

1

Return the interpupillary distance to
original condition and prepare for the
inspection. (see page 6)

Mount the removed components to the
microscope frame.

9)

Do a final check following the inspection
sheet in this manual. (See page 7)

Lens tissue Neutral detergent

(For plastic part or

frame)

Cleaning solution

(For lens or filter

etc.)

- 2 -

Cotton swab

or tweezers

etc.

Blower Silicon cloth

(For finishing)

CX31/41 MAINTENANCE MANUAL MAINTENANCE PROCEDURE

Put it on the desk

2-2 Cleaning method for the optical components

Required tools:

1) Lens tissue

2) Cotton swab or tweezers etc.

3) Blower

4) Magnifier (Eyepiece is possible to be used by turning it upside down. Refer to page 10.)

5) Cleaning solution: e.g. Alcohol
Before cleaning: Lightly brush the lens surface or blow with the blower before wiping with tissue.

This removes particles that may scratch the lens surface. (to protect the lens
coating)

HOW TO CLEAN THE OBJECTIVE LENS

1 2 3 4

Moisten the tip of
cotton swab with
cleaning solution.

When the lens size is large and difference in level
between the lens and the lens frame is small:

Fold the lens tissue several times and moisten it
with cleaning solution.
After that, apply the folded line edge to the center
of lens, push it with index finger and turn the
objective by the other hand to clean the lens
while moving it from the center towards the
periphery.

With a circular motion,
wipe the top lens
surface with the cotton
swab, to thoroughly
remove any oil or dirt
from the lens.

Dip a new cotton swab
in the cleaning solution
and shake vigorously
to remove any excess
cleaning solution.

Cleaning the immersion objective:

Wipe off the immersion oil while absorbing it with
lens tissue that is not moistened. After that, clean
the lens as the same manner mentioned on the
left. When the top surface of lens frame is higher
than that of lens and remained dirty potion on the
periphery of lens can not be wiped off, clean the
lens referring the above figures, 1 to 4.

Wipe the objective lens
from the center
towards the periphery,
while rotating the lens.

- 3 -

CX31/41 MAINTENANCE MANUAL MAINTENANCE PROCEDURE

HOW TO CLEAN THE FILTER

Fold the lens tissue into two or three layers and moisten its shaded part with cleaning solution.

Hold the filter at its edge and fold the lens paper from the lens center to outside as illustrated.
Move the lens tissue gradually to outside while turning the filter by left hand.

HOW TO CLEAN THE PRISM

Hold a sheet of lens tissue between your middle and index fingers, then fold and wrap it around your
index finger. Hold the tissue down with your thumb and moisten it with sufficient cleaning solution.

1)

2) 3)

4)

Wipe the prism surfaces from front to backward at a stroke, applying even pressure.

5)

6)

- 4 -

CX31/41 MAINTENANCE MANUAL MAINTENANCE PROCEDURE

HOW TO CLEAN THE EYEPIECE

1 2

Wrap a sheet of lens tissue around a cotton swab
as illustrated. If the area to be cleaned is large,
wrap the lens tissue looser and thicker. Otherwise,
make a thin, tight wrap.

Dip the wrapped lens tissue in the cleaning
solution, and wipe the eyepiece from the
center towards the periphery in a circular
motion.

Important notes:

1) Never rub the lens surface strongly.

2) Do not use the same lens tissue to clean more than one lens .

3) Do not moisten the lens tissue with an excessive amount of cleaning solution.

4) When cleaning with tweezers, be careful not to protrude its tip from the lens tissue.

- 5 -

CX31/41 MAINTENANCE MANUAL MAINTENANCE PROCEDURE

3. Preparing for Inspection

ADJUSTMENT OF KOEHLER ILLUMINATION

1) Set the main switch “A” to “I” (ON) and adjust the brightness by turning the adjustment knob “B” .

2) Place a specimen on the stage.

3) Engage the 10X objective in the light path.

4) Turn the condenser height adjustment knob “C” to raise the condenser to its upper limit.

5) Looking through the eyepiece in the right sleeve without the diopter adjustment ring, turn the
coarse and fine focus adjustment knobs “D” to bring the specimen into focus.

6) Looking through the eyepiece in the left sleeve with the diopter adjustment ring, turn only the
diopter adjustment ring “E” to focus on the specimen.
(At this time, adjust the interpupillary distance so that the binocular visions on the left and right
fields of view coincide completely.)

7) Turn the field iris diaphragm ring “F” counterclockwise so that the iris diaphragm image comes
inside the field of view.

8) Manipulate the condenser height adjustment knob “C” to focus on the iris diaphragm image.
(See Fig.1)

9) Turn the two centering screws “G” of attachment lens to move the iris diaphragm image to the
center of field of view. (See Fig. 2)

10) Gradually open the field iris diaphragm. The condenser is properly centered if the iris diaphragm
image is centered and inscribed in the field of view. (See Fig.3)
(During actual use, open the field iris diaphragm slightly until its image circumscribes the field of
view. See Fig.4)
Reference: Since the contrast of microscope specimens is ordinary low, setting the condenser

aperture iris diaphragm to between 70% and 80% of the N.A. of the objective in use
is usually recommended. If necessary, adjust the ratio by removing the eyepiece and
looking into the eyepiece sleeve while adjusting the aperture iris diaphragm ring “H”.

(E)

(H)

(G)

(F)

(C)

(A)

4

3

5

2

6

1

(B)

(D)

Field iris
diaphragm image

Fig.1

Fig.2

Fig.3

Fig.4

- 6 -

CX31/41 MAINTENANCE MANUAL MAINTENANCE PROCEDURE

4. CX31/41 Inspection Sheet

Model : Check Date :
S/N : Checking by :

Check Point Check Contents Result Ref. Page

1. Electrical unit 1) When the power switch is turned on, the lamp is lit
and the brightness can be varied by adjustment
knob.

2. Coarse/fine focus

adjustment knob

3. Stage

4. Observation tube

5. Revolving

nosepiece

7. Illumination 1) The field/aperture iris diaphragm ring is moved

8. Visibility

(Observation)

Remarks:

1) The coarse/fine focus adjustment knob is
smoothly moved without any stress or
unevenness.

2) The tension of coarse focus adjustment knob can
be adjusted by the adjustment ring.

3) CX31: The upper limit is changed by turning the

ring of stopper on the front upper side.

CX41: The coarse upper limit lock is effective.

1) The stage should not fall spontaneously. OK / NO

2) A specimen is held securely by the specimen
holder.

3) The X/Y movement is smooth without
unevenness, backlash or slipping.

1) The interpupillary distance adjustment can be
operated smoothly in working range.

2) When changing the interpupillary distance, the
displacement of optical axis is not apparent.

3) The diopter adjustment ring is moved smoothly in
working range.

4) The optical axis of left side coincides with that of
right side.

5) CX41: The tilting angle is easily adjusted and its

angle is stable. (when the U-TBI3 is used: )

6) CX41: When changing the tilting angle, the

optical axis displacement is not apparent.
(when the U-TBI3 is used: )

1) The revolving nosepiece can be rotated smoothly
and stops at the click position.

1) The vertical movement of condenser is smooth. OK / NO6. Condenser

2) The centering of field iris diaphragm can be
adjusted with the centering knobs of attachment
lens(CX-AL).

normally.

1) Observation image is normal.
Without flares /ghosts / vignetting /uneven
illumination

2) When photographed, there is no unevenness or
shading on the film surface.

3) Dust and dirt are not noticeable in observation or
photomicrography.

OK / NO 18, 19

OK / NO 17

OK / NO

OK / NO

OK / NO

OK / NO 15, 16

OK / NO

OK / NO

OK / NO

OK / NO 11, 12, 13

OK / NO
OK / NO

OK / NO

OK / NO

OK / NO

OK / NO

OK / NO

OK / NO 8, 9

- 7 -

CX31/41 MAINTENANCE MANUAL INSPECTION PROCEDURE

CHAPTER 2

INSPECTION PROCEDURE

1. Checking Performance of Microscope

Using the CX31/41 inspection sheet (P.7), check the electrical unit, mechanical and optical
performance.

2. Checking Dirty Portion

2-1 Image influence caused by dirt on each component

The following figure shows the influence of image on each optical component if stains or
dust is adhered to that portion.
In general, the microscope image or photographing is largely affected by dirt adhered on
the nearer portion to a specimen and image surfaces.
Therefore, the optical components should be kept clean and dust-free.

C Prism

B Eyepiece

D Objective

OLYMPUS

CX41

A Specimen

B Condenser lens

B Attachment lens

(Lens and filter)

B or A Glass

304

1

5

6

C Frosted glass

C Collector lens

A: Dirt is clearly seen.
B: Blurred contours of dirt is seen.
C: Dirt is seen when the aperture iris diaphragm is stopped down.
D: Dirt is not directly seen, but contrast of image deteriorates

- 8 -

CX31/41 MAINTENANCE MANUAL INSPECTION PROCEDURE

2-2 How to find dirty portion through observation

1) Close the aperture iris diaphragm.
(When the aperture iris diaphragm is closed, it facilitates finding the dirt particles

because the depth of focus increases and the dirt position bring into focus. However,
very small dirt particle may not be found in this method.)

2) Observe a specimen through the eyepiece.
If dirt is seen by observing it, look for the portion where stains or dust is adhered by

moving the following components as well as a specimen.
For TV camera, check it by method shown below.

Photo eyepiece

Check it by rotating
the photo eyepiece.
(The dust particles will be
focused on the film plane.)

Eyepiece
Check it by rotating the eyepiece.
(Wipe carefully and gently so as
not to damage the lens coating.)

Objective
Dirt is not directly seen, but
dirt and dust particles affect
the microscope image.

Condenser
Check it by loosening the
fixing screw and turning
the condenser.

Collector lens
Check it if conspicuous dirt
is not seen.
(Dust and dirt particles here
have minimal effect on the
image. However, the overall
appearance requires inside
lens cleaning.)

OL

YMPUS

NFK5XLD
125

TV camera
Dust particles appearing on
the monitor screen: if the particles
move only when the specimen or
condenser is moved, clean the
specimen and/or condenser.
If they do not moved when the TV
camera is rotated, clean the
camera tip.

4

3

5

2

6

1

Mirror for Large format attachment

Dust and dirt particles here affect
pictures. Difficult to clean without
damaging the mirror surface.
Please contact your Authorized Olympus
dealer.

Note: If dirt particles do not move by moving the above components, it is assumed that

internal lenses are contaminated.
In this case, please contact your Authorized Olympus dealer.

- 9 -

CX31/41 MAINTENANCE MANUAL INSPECTION PROCEDURE

2-3 How to check cleaning condition

1) When a large lens is checked, look at the lens while putting it toward bright side or
breathe on the lens and observe the condition that the haze on the whole surface of
the lens disappears evenly.

Light

Dust becomes conspicuous when
looking at it with the lens
inclination changed.

2) For a small lens such as top lens of objective, check it by magnifier.

If there is a dirty part or a remained part that
is not cleaned completely, the haze of this
part will disappear slower than that of the
other part.

An eyepiece can be substituted for
magnifier by turning the eyepiece upside
down.

- 10 -

CX31/41 MAINTENANCE MANUAL REPAIR PROCEDURE

CHAPTER 3

REPAIR PROCEDURE

1. Optical Adjustment

PREPARATION

*1 WHB10X

*1 It is necessary to set the
cross micrometer disk to
the above eyepiece.

Adjusting the left/right optical axis

If the left/right optical axis is remarkably displaced at
checking, perform the following adjustment.

*Insert the cross eyepiece
into the right sleeve.

Objective 4X-10X

specimen

whose center is
identified
(Concentric circles etc.)

Align the specimen center with the cross center of the

WHB10X eyepiece by turning the control knob of the stage.

Before adjustment

After adjustment

*Adjust the interpupillary
distance to about 62mm
(See the illustration)

Position of
approx. 62mm

75

70
60
50

Cross center of
WHB10X

specimen center

Control knob

- 11 -

CX31/41 MAINTENANCE MANUAL REPAIR PROCEDURE

ADJUSTMENT THE LEFT/RIGHT OPTICAL AXIS

(1) Moving the cross eyepiece to the left sleeve

Work Image seen through the cross eyepiece

Move the cross eyepiece to the left sleeve.

If the optical axis between left and right
sleeve is deviated, the center of the

75

70

60
50

specimen and the cross center of eyepiece
are also deviated.

(2) Aligning the cross center of eyepiece with the specimen center

Work Image seen through the cross eyepiece

1. Loosen the two screws slightly which

Image at first

secure the left sleeve.

75

70
60

50

2. Align the center of eyepiece with the
specimen center while observing
through the WHB10X. (Change the left
sleeve position by hand.)

75

70
60
50

The center is aligned.

- 12 -

CX31/41 MAINTENANCE MANUAL REPAIR PROCEDURE

3. Firmly tighten the screws which secure

Image at the end of adjustment

the left sleeve.

75

70

60

50

* If this adjustment could not be done, inside mechanism may be damaged.

Please contact your Authorized dealer.

- 13 -

CX31/41 MAINTENANCE MANUAL REPAIR PROCEDURE

2. Mechanical Adjustment

2-1 Preparation for the tension adjustment of Y-wire

If a specimen image is moved when the stage is brought into the desired position of
specimen, it is necessary to adjust the wire tension of stage.

1)

Back plate ass'y

*1

Remove the back plate ass’y from the frame.
(For the screw positions, refer to the above figure.)

: Attachment screws to the frame

CUK3X4SA 5pcs.
CUKHWB3X6SA 1pc. (lower left: *1)

2)

a

(up)

b

(down)

CN1

Inlet cable

of power

switch

CN3

CN2

b

(White)

a

(Black)

Disconnect the cable connectors from the circuit
board (CN1-CN3) and also the inlet able connectors
from the power switch terminals.

3)

*Stage holder
reference direction

: Stage holder attaching screws

ABSK3X10SA 4pcs.

Remove the screws on the back inner section and the
stage holder.
(For the screw positions, refer to the above figure.)

4)

4

3

5

2

6

1

Separate the stage from the frame, turn over the
stage and put on the table.
(When assembling, install the stage holder while
pushing it to the lower right as seen from the rear.
*See the left figure.)

- 14 -

CX31/41 MAINTENANCE MANUAL REPAIR PROCEDURE

2-2 Adjustment method for the tension of Y-wire

A007

*1

*2

(A)

1) Loosen the screws (*1) securing the holder.

Screws: CUK 3X6SA (*1) 2pcs. (clamping)

(B)

2) Adjust the tension of the wire by turning the
screw (*2) clockwise to tight or counter­clockwise to release.

Screw: CSK3X6SA (*2) 1pc.(adjustment)

3) Temporarily tighten the screws (*1).

2-3 Confirmation of the Y-wire tension

1) Check that the Y-knob (A) is rotated following the movement of lower stage (B) when
moving the lower stage in stroke by a hand.

2) After confirming the above condition, Install the stage to the frame，set the
microscope at observation state and check that the image is brought into the desired
position without backlash (within 2 microns). If it is out of standard, perform the
adjustment referring to 2-4 on page16.

3) Repeat the above procedures until the condition is satisfied.
After adjustment, tighten the screws (*1) firmly and apply adhesive to three screws

(*1, 2).

Adhesive: OT1378 (Solvent-based adhesive)

Note:

1) If the wire is too tight, image backlash may occur. If the wire is loose, slip may occur
between the knob and wire deteriorating the image movement.

2) In case where the stage movement is heavy due to hardening of grease or the X- wire
adjustment is necessary, please contact your Authorized Olympus dealer because
disassembling the stage is required for grease replacement or that adjustment.

- 15 -

CX31/41 MAINTENANCE MANUAL REPAIR PROCEDURE

2-4 Final adjustment

Image backlash adjustment:

1) Under observation state (with 100X objec­tive), move the stage to the desired image
position by turning the Y-knob (A).
At that stop position, check image backlash.
If it is over 2 microns, conduct the following
adjustment.

2) When adjusting the Y-movement, loosen the
two screws (*1) and turn the Y-knob (A) to
bring backlash within 2 microns.

* After turning the knob and temporarily

tighten the screws, check image backlash in
the observation state. Repeat the
adjustment until image backlash is within the
standard.

A009

(B)

A008

(A)

*1

*2

Screws: AWU3 X4SA (*1) 2pcs.

3) For the X-movement, check that the backlash
can be adjusted by turning the X-knob (B) in
the same manner as the Y-knob adjustment.

* If it could not be adjusted, contact your

Authorized dealer because X-wire need to
be adjusted.

Screws: AWU3 X4SA (*2) 2pcs.

- 16 -

CX31/41 MAINTENANCE MANUAL REPAIR PROCEDURE

3. Replacing Grease for Fine Focus Adjustment Knob Ass’y

If the fine focus adjustment knob is not turned smoothly, replace grease on the shaft of fine
focus adjustment ass’y in the following procedure.
(In case where the coarse focus adjustment knob is not turned evenly, please contact your
Authorized Olympus dealer because it is necessary to disassemble the coarse focus
adjustment knob ass’y and/or guide unit.)

1) Peel off the plates on the left and right sides of fine focus adjustment knob.
Insert Allen wrenches (2.5mm) into the both side screws.

Screws: ABS3X8SA 2pcs. (*1)

2) Turn the screw (*1) on the right side with Allen wrench while the left side screw is held with
it, and pull out the fine focus adjustment knob ass’y.

(At this time, the fine focus adjustment knob ass’y (right ) is removed as an assembly of

shaft (a), gear (b) and fine focus adjustment knob (c).)

3) Confirm that the gear is not damaged. If it is damaged, replace the gear or the fine focus
adjustment knob ass’y as a whole.

4) Remove grease (OT2008) on the shaft by cleaning solution and replace it.
*When applying the grease, refer to the explanation shown below.

5) Assemble the components in reverse order of disassembly.

4

3

5

2

1

A006

H

Applying grease (OT2008) to the shaft (a) of the fine focus adj.knob ass’y and the sliding
surface:
Apply grease to the outer surface of the shaft. First, spread the grease by inserting from
the left while rotating the fine focus adj. knob ass’y. After removing the fine adj. knob
ass’y, place the shaft at the opposite side mouth (to the right). Again apply grease to the
shaft and then insert into the right side. Use the lens tissue to wipe away any grease
exuding from the left and right.

Fine focus adjustment knob ass'y

6

A002 (a)
*Apply grease(OT2008)
to the shaft.

Adhesive(OT1378) has been
applied to the screw thread
of the shaft on the right side.

A004

A003 (b)

A005 (c)

*1

Plate

A001

- 17 -

CX31/41 MAINTENANCE MANUAL REPAIR PROCEDURE

(C)

4. Electrical Adjustment

4-1 CX31/41 wiring diagram

U003

CN2

U004

1

2

A012

(AQ802400)

6V
Halogen

bulb

U001

INPUT

100-120/
220-240VAC
50/60Hz

H

Voltage Adjustment

A010

U002

S001

X001

N

L

E

X002

1

CN1

3

Main Board

A011

Rheostat

Ass'y

CN3

Dimmer Cont

The circuit board ass’y (AQ802400) consists of the circuit board (DZ290300) and rheostat
ass’y (DZ290400). In case where the above parts are replaced as AQ802400, the voltage
adjustments for the circuit board ass’y are not necessary. However, voltage adjustments are
necessary when individually replacing either the circuit board (DZ290300) or rheostat ass’y
(DZ290400). The following explains procedures for replac ing, preparation and adjustment of
the minimum and maximum voltages .

4-2 Replacing circuit board / rheostat ass’y

1) Remove the screws securing the BACK

*1

PLATE ASS’Y (A).

Screws: CUK3X4SA (*1) 5 pcs.

CUKHWB3X6SA (*2) 1 pc.

(A)

*3

2) Disconnect the cables from the CIRCUIT
BOARD (B) connectors.

*2

*4

(B)

CN1

a

CN1: Output side connector
CN2: Lamp connector
CN3: Rheostat ass’y connector

3) Disconnect the inlet CABLES (C) from the
power switch terminals, and then take off

CN3

CN2

a

the BACK PLATE ASS’Y (A). (No need to
disconnect the “a” connection)

4) Remove the CIRCUIT BOARD (B).

Screws: CUK3X4SA (*3) 3 pcs.

(D)

CUKHWB3X6SA (*4) 1 pc.

5) Replace the CIRCUIT BOARD (B) /
RHEOSTAT ASS’Y (D).
(Rheostat ass’y (D): Please contact your
Authorized dealer.)

- 18 -

CX31/41 MAINTENANCE MANUAL REPAIR PROCEDURE

4-3 Preparation

1) Connect the cables to each connector

Inlet terminals

(CN1-CN3).

a

(up)

b

(down)

(A)

CN1

CN3

CN2

4-4 Voltage adjustments

CN1

b

(white)

a

(black)

Halogen bulb

2) Connect the cables to the power switch
inlet terminals.
Upper side: black Lower side: white

3) Set the digital multimeter so that the
voltage of the CN2 2-pin can be measured.

H

Use a new Halogen bulb when making
voltage adjustment

Minimum Voltage Adjustment

1) Turn ON the power. Turn the light intensity control
knob (A) counterclockwise to lower the lamp
brightness to its lowest level.

VR21

VR23

CN3

CN2

VR22

* Do not touch the inlet terminals with

power turned on because it could cause
an electric shock.
Be sure to turn off power during
assembly and reassembly.

* Do not turn the trimmer VR22 because it

is adjusted to the prescribed current
value.
(VR22 is set for overcurrent protection.)

2) Rotate the circuit board’s trimmer VR21 to adjust
so that the lamp output voltage between the CN2’s
1 and 2 pins is within the standard shown below
using a digital multimeter.

Standard: DC1.10~1.15V

(adjustment target: 1.123V)

Maximum Voltage Adjustment

1) Turn ON the power. Turn the light intensity control
knob (A) clockwise to increase the lamp brightness
to its highest level.

2) Rotate the circuit board’s trimmer VR23 to adjust
so that the lamp output voltage between the CN2’s
1 and 2 pins is within the standard shown below
using a digital multimeter.

Standard: DC 5.65~5.75V

(adjustment target: 5.70V)

- 19 -

CX31/41 MAINTENANCE MANUAL JIGS AND TOOLS / GREASES AND ADHESIVES

CHAPTER 4

JIGS AND TOOLS / GREASES AND ADHESIVES

1. List of Jigs and Tools

No. Description Ref. page

Cleaning tools 2, 3, 4, 5

*1 WHB10X

(It is necessary to set the cross micrometer disk.)
Digital multimeter 19
Philips screwdriver 12, 13, 14, 15, 18
Allen screwdriver (2.5mm) 14
Allen wrench (2mm, 2.5mm) 16, 17
Precision screwdriver 19
Dust cover

*1 Contact your Authorized dealer.

11, 12, 13

2. List of Greases

No. Description Ref. page

OT2008 Grease (medium) 17

3. List of Adhesives

No. Description Ref. page

OT1378 Solvent-based adhesive (transparent)

(For the fine focus adjustment knob ass’y, use adhesive
only when it is disassembled.)

15, 17

- 20 -

CX31/41 MAINTENANCE MANUAL MAINTENANCE PARTS

CHAPTER 5

MAINTENANCE PARTS

1. List of Maintenance Parts

Index No. Order No. Description Ref. page

*1 CX31LBSF Instruction manual

*1 CX41 Instruction manual
A001 AD071500 Plate
A002 AC732500 Shaft
A003 AA782600 Gear
A004 AQ153900 Fine focus adjustment knob ass’y

(when replaced as an assembly:)
A005 AB467500 Fine focus adjustment knob (right)
A006 AB059300 Fine focus adjustment knob (left)
A007 AD411200 Holder (for Y-wire) 15
A008 AC888300 X-knob
A009 AC888400 Y-knob
A010 DZ290300 Circuit board
A011 DZ290400 Rheostat ass’y
A012 AQ802400 Circuit board ass’y

(when replaced as a set :)

*1 6V30W halogen bulb 19

17

16

18

H

The index No. are shown on the figures in “REPAIR PROCEDURE” instead of parts No.
*1 Contact your Authorized dealer.

OLYMPUS OPTICAL CO., LTD

1-22-2, Nishi shinjuku shinjuku-ku, Tokyo, Japan

Issued by Marketing Dept.
Printed in Japan 2001 11 SK9214