TRK 1P RepairManual

R-TRK1P-0-0809-02

ISSUED............... AUG. 2008REVISED ............ REPAIR MANUAL

TRK-1PAUTO KERATO-REFRACTO-TONOMETER

TOPCON CORPORATION

R-TRK1P-0-0809-02

R-TRK1P-0-0809-02

CONTENTS

Page

1. INTRODUCTION ......................................................................................................................................11-1 Features of product .................................................................................................................................11-2 Specifications and performance of product ............................................................................................11-3 Target users of this manual .....................................................................................................................21-4 How to use this manual ...........................................................................................................................21-5 Cautions ..................................................................................................................................................2

2. PRODUCT OUTLINE .............................................................................................................................32-1 Nomenclature ..........................................................................................................................................32-2 Optical system (Layout) .........................................................................................................................42-3 Electric system ........................................................................................................................................82-4 Mode setting switches ...........................................................................................................................102-5 Principles ..............................................................................................................................................112-6 Measurement procedure ........................................................................................................................222-7 Layout diagrams for PCB .....................................................................................................................31

3. REPAIR WORK ......................................................................................................................................403-1 Inspection and adjustment procedures ..................................................................................................403-2 Disassembly and assembly procedures .................................................................................................493-3 Trouble shooting ...................................................................................................................................793-4 Assembly and adjustment procedures ................................................................................................103

4. TOOL LIST .............................................................................................................................................1874-1 Special tool list ...................................................................................................................................1874-2 General repair tools .............................................................................................................................190

1. INTRODUCTION1-1 Features of product(1) You can measure the refracting power, corneal shape, intraocular pressure and corneal thickness of the

patients eyes by easy operation.(2) When measuring the intraocular pressure, air blows more gently than before.(3) You can perform measurement quickly in the optimal condition because of the auto-alignment function

and auto-start function.

1-2 Specifications and performance of product

* For product improvements, the specification and appearance are subject to change without prior notice.Essential performance Measurement can be done.

REF measurementMeasuring range Hyperopia: 0 to +22D

0.25D step display (switchable to 0.12D step display)Myopia: 0 to -25D

0.25D step display (switchable to 0.12D step display)Astigmatism: 0 to 10D (+ or -)

0.25D step display (switchable to 0.12D step display)Axial angle: 0 to 180

1 step display (switchable to 5 step display)Minimum measurable pupil diameter 2.0mmTarget fixation Auto fog systemMeasurement data display Color LCD monitor screenMeasurement data recording Built-in printer

(10 measurement data each of right and left eyes)Kerato measurement

Measuring range Radius of corneal curvature: 5.00 to 10.00mm 0.01mm step displayCorneal refractory power: 67.50 to 33.75D

0.25D step display (switchable to 0.12D step display)(Proviso: corneal refractive index = 1.3375)

Corneal astigmatic power: 0 to 10D (+ or -)Corneal astigmatic axial angle: 0 to 180

1 step display (switchable to 5 step display)Measurement data displayMeasurement data recording

Color LCD monitor screenBuilt-in printer (10 measurement data each of right and left eyes)(Proviso: printing only typical values for R/K mode)

Ocular pressure measurementMeasuring rangeWorking distanceMeasurement data displayMeasurement data recording

0 to 30/0 to 60mmHg11mmColor LCD monitor screen (with average value)Built-in printer (with average value)

Alignment Color LCD monitor screenPD measurement measuring range 85mm max., 1mm display unitTV Monitor 6.5 type VGA color LCD monitorExternal output terminal RS-2322, USB1Operating temperature 10 to 40CMain body travel distance 40mm back/forth, 90mm sides, 30mm up/downChinrest travel distance 60mm up/down (electric) 1 R-TRK1P-0-0809-02

Monitor display is not disturbed.

1-3 Target users of this manualTRK-1P is an optical precision inspection instrument to be used for ophthalmology and internal medicine.Only a specialist for assembly and adjustment of medical machines can repair this instrument.For others except the specialist, it is recommended to take the TOPCON repair technique training course.

1-4 How to use this manualWhen performing initial inspection or inspecting, adjusting or repairing the TRK-1P for any problem, use thismanual according to the flow chart below.

1-5 Cautions Refer to the illustrations of the parts list for the disassembly and assembly of the unit which is not described

in this manual. Refer to the instruction manual for replacing the consumables. If the optical system is soiled when repairing, photographing is adversely affected. Be careful not to touch

or soil the optical system when disassembling, assembling or adjusting.

YES

NO

NO

OK

Operations procedureManual

Applicable item

Initial inspection Trouble

Inspection

Trouble locationcheck

Searching for thecause

Repair operations

Inspection

Normal

End

Page

Inspection and adjustmentprocedures

Disassembly and assemblyprocedures

Trouble shooting

Disassembly and assemblyproceduresAssembly and adjustmentprocedures

Inspection and adjustmentprocedures

TRK-1P basic data Measurement principle

P.40 - 48

P.49 - 78

P.79 - 102

P.49 - 78

P.40 - 48

P.103 - 186

P.11 - 21 2 R-TRK1P-0-0809-02

Order the repair parts by using the service parts list.

2. PRODUCT OUTLINE2-1 Nomenclature

Main body Section

Color LCD monitor

Control panel

Brightness control

Measurement switch

Control lever

Power lamp

Power supply Section

Measuring head

Chinrest up/down button

External I/O terminal

Printer cover open button

POWER switch

Inlet cover

Forehead rest

Measuring opening

Height mark

Chinrest tissue stopper pin

Chinrest

Chinrest Section

Measuring window

Measuring opening

Measuring nozzle

Measuring window at TONO/PACHO mode

Measuring window lens cap 3R-TRK1P-0-0809-02

2-2 Optical system (Layout)2-2-1 Measurement system

Eye

bei

ngm

easu

red

Ant

erio

r ey

e se

ctio

nill

umin

atio

n L

ED

4 9

50nm

Ref

lect

ive

mir

ror

3

Fixa

tion

targ

et r

elay

lens

A

Fixa

tion

targ

et r

elay

lens

B

Fixa

tion

targ

et

Con

dens

erle

ns

Col

orco

mpe

nsat

ion

filte

rT

ungs

ten

lam

p1/

3" C

CD

C

AM

ER

AT

V le

nsH

alf

mir

ror

5

Alig

nmen

tre

lay

lens

B

SPO

T L

ED

94

0nm

Alig

nmen

t rel

ay le

ns A

Hal

f m

irro

r 3

Hal

f m

irro

r 1

Hal

f m

irro

r 2

Con

dens

er le

ns

Rot

ary

pris

m

Obj

ectiv

e le

nsPi

nhol

e pr

ism

Para

llel p

roje

ctio

nL

ED

2 9

50nm

Rin

g pa

ttern

LE

D2

695

0nm

Ant

erio

r ey

e se

ctio

n ill

umin

atio

n L

ED

4

950n

m

Ref

lect

ive

mir

ror

1

Ref

lect

ive

mir

ror

2

Mea

sure

men

t rel

ay le

ns B

Mov

emen

t len

s

Rin

g ir

is

Mea

sure

men

t rel

ayle

ns A

Mea

sure

men

tta

rget

Con

dens

er le

ns

Mea

sure

men

t L

ED

860

nm 4R-TRK1P-0-0809-02

2-2-2 KR unit fixation target system

Eye

bei

ngm

easu

red

Ant

erio

r ey

e se

ctio

nill

umin

atio

n L

ED

4 9

50nm

Ref

lect

ive

mir

ror

3

Fixa

tion

targ

et r

elay

lens

A

Fixa

tion

targ

et r

elay

lens

B

Fixa

tion

targ

et

Con

dens

erle

ns

Col

orco

mpe

nsat

ion

filte

rT

ungs

ten

lam

p1/

3" C

CD

C

AM

ER

AT

V le

nsH

alf

mir

ror

5

Alig

nmen

tre

lay

lens

B

SPO

T L

ED

94

0nm

Alig

nmen

t rel

ay le

ns A

Hal

f m

irro

r 3

Hal

f m

irro

r 1

Hal

f m

irro

r 2

Con

dens

er le

ns

Rot

ary

pris

m

Obj

ectiv

e le

nsPi

nhol

e pr

ism

Para

llel p

roje

ctio

nL

ED

2 9

50nm

Rin

g pa

ttern

LE

D2

695

0nm

Ant

erio

r ey

e se

ctio

n ill

umin

atio

n L

ED

4

950n

m

Ref

lect

ive

mir

ror

1

Ref

lect

ive

mir

ror

2

Mea

sure

men

t rel

ay le

ns B

Mov

emen

t len

s

Rin

g ir

is

Mea

sure

men

t rel

ayle

ns A

Mea

sure

men

tta

rget

Con

dens

er le

ns

Mea

sure

men

t L

ED

860

nm 5R-TRK1P-0-0809-02

2-2-3 KR unit alignment system

Eye

bei

ngm

easu

red

Ant

erio

r ey

e se

ctio

nill

umin

atio

n L

ED

4 9

50nm

Ref

lect

ive

mir

ror

3

Fixa

tion

targ

et r

elay

lens

A

Fixa

tion

targ

et r

elay

lens

B

Fixa

tion

targ

et

Con

dens

erle

ns

Col

orco

mpe

nsat

ion

filte

rT

ungs

ten

lam

p1/

3" C

CD

C

AM

ER

AT

V le

nsH

alf

mir

ror

5

Alig

nmen

tre

lay

lens

B

SPO

T L

ED

94

0nm

Alig

nmen

t rel

ay le

ns A

Hal

f m

irro

r 3

Hal

f m

irro

r 1

Hal

f m

irro

r 2

Con

dens

er le

ns

Rot

ary

pris

m

Obj

ectiv

e le

nsPi

nhol

e pr

ism

Para

llel p

roje

ctio

nL

ED

2 9

50nm

Rin

g pa

ttern

LE

D2

695

0nm

Ant

erio

r ey

e se

ctio

n ill

umin

atio

n L

ED

4

950n

m

Ref

lect

ive

mir

ror

1

Ref

lect

ive

mir

ror

2

Mea

sure

men

t rel

ay le

ns B

Mov

emen

t len

s

Rin

g ir

is

Mea

sure

men

t rel

ayle

ns A

Mea

sure

men

tta

rget

Con

dens

er le

ns

Mea

sure

men

t L

ED

860

nm 6R-TRK1P-0-0809-02

2-2-4 CT unit

CCD camera

Cover glassObjective lens

Applanation sensor

Split mirror

Imaging lens

Split mirror

Corrector lens

XY LED

Fixation LED

Diffusion plate

Dichroic mirror

Collimator lens

Half mirror

Chamber window glass

Glass with nozzle

PACHO LED

Condenser lensIris

Z alignment/applanation LED

Relay lens

Condenser lens

Split mirror

Objective lensAnterior eye section window glass

Eye being measured

Diffusion plate

Anterior eye section illumination LED

Objective lens

Split mirror

Z sensorRelay lens

Cylindrical lens

Relay lens

Line sensor 7R-TRK1P-0-0809-02

2-3 Electric system2-3-1 Electric system block diagram

RS232C IN

RS232C OUT

LCD relay

PCB

LCD

CCD camera unit

Voltage conversion circuit

Measurement SW

CONTROL SW PCB

SW control circuit

Chinrest up/down SW

PRINTER PCB

Printer control circuit

Printer

Commercial power supply

Plug

Fuse

Switching power supply

Electric

chinrest PCB

DC motor

Motor drive circuit

MOTOR DRIVER PCB

Z a

xis

moto

r

Y a

xis

moto

r

X a

xis

moto

r

+24V

+24V

+5V

+5V

CPUFlash ROM

SDRAM

E2PROM

Clock generation circuit

Pressure sensor PCB

Applanation sensor PCB

Z sensor PCB

Anterior eye section illumination

Z LED

PACHO LED

Fixation LED

XY LED

Analo

g s

ignal

pro

cessin

g

circuit

Driver

for

lighting L

ED

ANALOG

I/F PCB

Driver for lighting LED

SP

OT

LE

D

Fix

ation targ

et la

mp

SP

LE

D

S R

ING

2 L

ED

S R

ING

1 L

ED

Measure

ment LE

D

Motor drive circuit

TF

moto

r

Open a

ir m

oto

r

Rota

ry s

ole

noid

LZM DRIVER PCB

Z a

xis

zero

dete

ction s

ensor

Y a

xis

low

er

limit s

ensor

Y a

xis

zero

dete

ction s

ensor

Y a

xis

upper

limit s

ensor

X a

xis

zero

dete

ction s

ensor

He

ad

ch

an

gin

g b

ack

-an

d-f

ort

h m

oto

r

He

ad

ch

an

gin

g u

p-a

nd

-do

wn

mo

tor

Head c

hangin

g r

ear

limit s

ensor

Head c

hangin

g fro

nt lim

it s

ensor

Head c

hangin

g low

er

limit s

ensor

Head c

hangin

g u

pper

limit s

ensor

VIDEOcompositioncircuit

FONT ROM

POWER PCB

D/A conversion

USB

TR

K z

ero

de

tectio

n s

en

so

r

+3.3V+5V+15V+24VCONTROL PCB

+15V

LCD Panel SW1 PCB

LCD panel SW2 PCB

+12V 8R-TRK1P-0-0809-02

9R-TRK1P-0-0809-02

2-3-2 Wiring diagram

4

1

8

5

0

7

2

0

0

1

2

1

2

P211 J211

1

2

1

2

P210 J210

1

2

1

2

P209 J209

1

2

1

2

P208 J208

P207 J207

1

-

4

1

-

4

P206 J206

P203 J203

P204 J204

1

-

6

1

-

6

J201

1 - - - 401 - - - 40

1

-

-

1

2

J205P205

1 - - - 401 - - - 40P4

J4P10J10

12

12

1-

--

151

--

-15

P9 J9

12

P812

J8

1 2 31 2 3

P16J16

1 21 2

P17J17

41850 7100

J99 1 - - 14P3 1 - - - - - - 30

1 - - - - - - 30J31 - - 10 J98

41850 7860

1 - - - - - - 301 - - - - - - 30P301

J301

1 - - 61 - - 6P307

J3071- 41- 4P308

J3081 21 2J305

P3051 2 31 2 3J312

P312

4

1

8

4

0

6

1

2

0

41850 7300

1- 41- 4

P309J309

1 21 2

1 21 2

P306J306

P303J303

1 21 2

P304J304J311 1 2 31 2 3

1 2 3P310J310

1 21 2J302

P302

CT OPTICAL HEAD

CCD UNIT

PROTECTIVE EARTH CABLE3

CONDENSER UNIT

SOLENOID UNIT

LINE SENSORPCB

PACHO CABLE 2 UNIT

PACHO CABLE 1 UNIT

VM_CABLE ASSY

CCD CLOCK CABLE 1 UNIT

CCD POWER CABLE 2 UNIT

APPLANATION SENSOR PCB

PRESSURE SENSOR PCB

APPLANATION SENSOR CABLE UNIT

Z SENSOR PCB

Z SENSOR CABLE UNIT

ANTERIOR EYE SECTIONILLUMINATION LED UNIT

Z LED UNIT

PACHO LED UNIT

FIXATION LED UNIT

XY LED UNIT

ANALOG CABLE UNIT

A

N

A

L

O

G

P

C

B

3P_SW CABLE UNIT

M

L

A

M

P

P

C

B

A

S

S

Y

K

O

S

H

I

L

A

M

P

A

S

S

Y

S

R

L

E

D

P

C

B

A

S

S

Y

S

R

I

I

N

G

1

P

C

B

A

S

S

Y

S

R

I

I

N

G

2

P

C

B

A

S

S

Y

S

P

O

T

P

C

B

A

S

S

Y

T

R

K

Z

E

R

O

K

E

N

P

C

B

A

S

S

Y

T

F

M

O

T

O

R

A

S

S

Y

O

P

E

N

A

I

R

M

O

T

O

R

A

S

S

Y

R

O

T

A

R

Y

S

O

R

E

N

O

I

D

A

S

S

Y

LZM DRIVER PCB

FOR DEBUG

PROTECTIVE EARTH CABLE 4

LCD UNIT

LCD PANEL SW CABLE 1 UNIT

LCD PANEL SW PCB 1

LCD RELAY PCBINVERTER UNIT LCD PANEL SW CABLE 2 UNIT

LCD PANEL SW PCB 2

LCD-CONTROL CABLE UNIT

LCD INVERTER CABLE UNIT

INVERTER POWER CABLE

CONTROL PCB

CAMERA IMAGE CABLE UNIT

CCD CLOCK CABLE 1 UNIT

CCD POWER CABLE 1 UNIT

CCD UNIT

RM OPTICAL HEAD

PROTECTIVE EARTH CABLE 2

X

A

X

I

S

M

O

T

O

R

C

A

B

L

E

U

N

I

T

S

T

E

P

P

I

N

G

M

O

T

O

R

X

A

X

I

S

Y

A

X

I

S

M

O

T

O

R

U

N

I

T

Z

A

X

I

S

M

O

T

O

R

C

A

B

L

E

U

N

I

T

S

T

E

P

P

I

N

G

M

O

T

O

R

Z

A

X

I

S

X

A

X

I

S

Z

E

R

O

D

E

T

E

C

T

I

O

N

S

E

N

S

O

R

U

N

I

T

Y

A

X

I

S

U

P

P

E

R

L

I

M

I

T

S

E

N

S

O

R

U

N

I

T

Y

A

X

I

S

Z

E

R

O

D

E

T

E

C

T

I

O

N

S

E

N

S

O

R

U

N

I

T

Y

A

X

I

S

L

O

W

E

R

L

I

M

I

T

S

E

N

S

O

R

U

N

I

T

Z

A

X

I

S

Z

E

R

O

D

E

T

E

C

T

I

O

N

S

E

N

S

O

R

U

N

I

T

H

E

A

D

C

H

A

N

G

I

N

G

U

P

-

A

N

D

-

D

O

W

N

M

O

T

O

R

U

N

I

T

H

E

A

D

C

H

A

N

G

I

N

G

B

A

C

K

-

A

N

D

-

F

O

R

T

H

M

O

T

O

R

U

N

I

T

H

E

A

D

C

H

A

N

G

I

N

G

R

E

A

R

L

I

M

I

T

S

E

N

S

O

R

U

N

I

T

H

E

A

D

C

H

A

N

G

I

N

G

F

R

O

N

T

L

I

M

I

T

S

E

N

S

O

R

U

N

I

T

H

E

A

D

C

H

A

N

G

I

N

G

L

O

W

E

R

L

I

M

I

T

S

E

N

S

O

R

U

N

I

T

H

E

A

D

C

H

A

N

G

I

N

G

U

P

P

E

R

L

I

M

I

T

S

E

N

S

O

R

U

N

I

T

C

T

P

L

-

P

W

R

C

A

B

L

E

2

U

N

I

T

C

T

P

L

-

P

W

R

C

A

B

L

E

1

U

N

I

T

P

R

O

T

E

C

T

I

V

E

E

A

R

T

H

C

A

B

L

E

1

U

S

B

I

/

F

C

A

B

L

E

2

U

N

I

T

USB I/F CABLE UNIT

POWER PCBMOTOR DRIVERPCB

M_DRV_POWERCABLE UNIT

POWER CABLE 2 UNIT

RS-232C IN CABLE UNIT

RS-232C OUT CABLE UNIT

SWITCHING POWER SUPPLY

POWER CABLE 1 UNIT

P

R

I

N

T

E

R

I

/

F

C

A

B

L

E

U

N

I

T

P

R

I

N

T

E

R

P

O

W

E

R

C

A

B

L

E

A

S

S

Y

PRINTER PCB

PRINTER RO

U

G

H

/

F

I

N

E

M

O

V

E

M

E

N

T

C

H

A

N

G

I

N

G

S

E

N

S

O

R

U

N

I

T

E

N

C

O

D

E

R

S

E

N

S

O

R

U

N

I

T

X

A

X

I

S

J

O

G

S

E

N

S

O

R

U

N

I

T

Z

A

X

I

S

J

O

G

S

E

N

S

O

R

U

N

I

T

CONTROL SWCABLE UNIT

MEASUREMENT SWCONTROLSW PCB

P

R

O

T

E

C

T

I

V

E

E

A

R

T

H

C

A

B

L

E

5

ELECTRIC CHINREST PCB

CHINREST CABLE UNIT

LZM CABLE UNIT

2-4 Mode setting switchesThe mode setting switch is only SW5 on the CONTROL PCB.The following table shows the functions of the mode setting switches. Refer to it.

No. ON1 Unused.2 Compensation mode for China3 PCB check mode4 Unused.5 Changes the R/K step. (0.01 display)6 Displays the AD value among the CT measured values.7 Displays the serviceman menu.8 Adjustment mode 10R-TRK1P-0-0809-02

2-5 Principles2-5-1 Kerato-refractometer unit1. Target image projection to eyeground (ref function)The fundamental principle is the same as for previous models: the measurement target is projected from theiris image of the pupil section and the light reflected from the eyeground is detected.The following figure is a general diagram of this method.

As the figure shows, the ring pattern is used as the measurement target, the image is projected onto the eye-ground from the pupil ring iris and the image reflected from the eyeground is detected with the CCD CAM-ERA. The detected image is image processed and the way in which the circle is converted shows therefraction of the eye.

2. Measuring principle (kerato function)

As shown in the figure, the kerato ring is projected on the cornea and the reflected image is detected with aCCD CAMERA. The reflected image detected here undergoes image processing to compute the radius ofcurvature and the refracting power of the cornea.

Ring iris

Measurement

Eyeground

Eye being measured

targetThe eyeground is observed from the center byshooting from the pupil section ring iris imageinto the eyeground.

Kerato ring

Kerato ring image projected on the cornea.Size: 3mm (in the case of R7.7) 11R-TRK1P-0-0809-02

3. Functional block diagram

Here is a flow chart for this process.

Round

Near shighted orfar sighted

The target image is projectedonto the eyeground by theoptical system.

(In the case of REF.)

The image reflected back fromthe eyeground is detected bythe REF CCD CAMERA.

Image processing.Measurement of the center ofthe reflected image

Roundor

elliptical

Elliptical

Astigmatic

A kerato ring image isprojected on the cornea withthe optical system.

(In the case of KERATO)

The image reflected backfrom the cornea is detected bythe KRT CCD CAMERA.

Image processing.Measurement of the center ofthe reflected image 12R-TRK1P-0-0809-02

In the case of REF mode

NO

YES

Rough measurement

Measurement

Focusof the reflected

image OK?

The target image is projected onto the eyeground by the optical system.

The image reflected back from the eyeground is detected by the REF CCD CAMERA.

Image processing.Measurement of the center of the reflected image

The target image is projected onto the eyeground by the optical system.


Image processing.Measurement of the center of the reflected image

Calculation

S.C.A. (spherical, cylindrical, axis) data output

Measurement target motor is moved.

Calculation 13R-TRK1P-0-0809-02

In the case of R/K mode


image OK?

The target image is projected onto theeyeground by the optical system.


Rough measurementof refractometer

Kerato measurement

Ref measurement

Keratomeasurement

NO

YES

Image processing. Measurement of the center of the reflected image

Calculation

Measurement target motor is moved.The kerato ring image is projected on thecornea by the optical system.

The image reflected back from the eye-ground is detected by the REF CCD CAMERA.

The image reflected back from the cornea is detected by the KRT CCD CAMERA.

The image data is written on the memory.

The target imgae is projected onto theeyeground by the optical system.

Image processing. Measurement of thecenter of the reflected image.

Calculation of kerato data.

Calculation of refractometer data.Reads image data from memory.

S.C.A. (spherical, cylindrical, axis) dataoutput. H.V. data output.

Image processing. Measurement ofthe center of the reflected image. 14R-TRK1P-0-0809-02

In the case of KRT mode


image OK?

The target image is projectedonto the eyeground by theoptical system.

Rough measurement of refractometer

Kerato measurement

NO

YES

The image reflected back fromthe eyeground is detected bythe REF CCD CAMERA.

Calculation

Measurement target motor is moved.


The kerato ring image isprojected onto the cornea bythe optical system.

The image reflected back fromthe cornea is detected by theKRT CCD CAMERA.

Only at the first measurement


Calculation

H.V. data output 15R-TRK1P-0-0809-02

4. Image processing

(1) ObjectiveTo find the centers of the inner diameter and outer diameter of the ring image reflected back from the eye-ground.

(2) Method As shown in the figure below, the image is divided up like a checker board. The right and left lines are atregular intervals and parallel to the Y axis and the up and down lines are at regular intervals and parallel tothe X axis.The axes are set up so that the intersection of the X-axis and Y-axis is the center of the ring.Suppose that the difference of the coordinates for the inner diameter and the outer diameter of the ring isonly 7 units, as in the figure below. In this case, if the smallest unit that can be resolved is 1 unit, the centerbetween the outer diameter and the inner diameter is either Circle A or B. In other words, if the differencebetween the inner diameter and the outer diameter is an even multiple of the minimum resolution, then thecenter can be measured accurately, but if the difference is an odd multiple, then the center cannot be mea-sured accurately.If the reference units are made smaller than the measurement precision, an error of one reference unitcould be ignored.

This circle or ellipse is measured.

1

2

3

Y axis

X axis

AB 16R-TRK1P-0-0809-02

The CCD CAMERA is a collection of extremely small such checker board squares. Normally, a CCD CAM-ERA comprises hundreds of thousands of squares.In summary:

The reflected image detected with the CCD CAMERA is stored into memory with one data bit for eachchecker board square.The coordinates are calculated from the stored data and the center of the inner diameter and the outerdiameter of the ring image is found.The pattern for the figure found in is identified to obtain the change in the image.

(3) Calculation of the S.C.A. data

Measuring the change in the distance of the ring image from the origin of the coordinates (center of the ringimage) over a certain angle gives the S.C.A. data.

1

2

3 2

A

S

C

0D

S: SphericalC: CylinderA: Axis

TF MOTOR

Deformation

movement distance(S.E.=Spherical

Equivalent)

S : SphericalC : CylindricalA : Axis 17R-TRK1P-0-0809-02

5. Rotary prism method

There is fluctuation between the measured values because the eyeground condition is not always even due to adisease, blood vessles, etc. Place a prism in front of the ring iris and rotate it during measurement. In a widerarea than the usual eyeground, the eyeground information is averaged to reduce the above fluctuation.

Projection condition on eyeground

Measured target image projected

Ring iris

Ring iris

PrismEye being measured

Eyeground

on the eyeground

Conventional method

d

Rotary prism method

Approx.1.4d 18R-TRK1P-0-0809-02

6. Principles of auto-alignment

For vertical or horizontal directions (X and Y axes), check the alignment by using the positional relationbetween the alignment spot and alignment mark of the reflected image as the conventional RM/KR-8800series. For the focus direction (Z axis), check the alignment by using the relation between the parallel pro-jected spot and placido ring.

+

Measurable min. pupil diam.

Focus direction Vertical direction

Horizontal direction

Eye being measured

Alignment mark

XY direction judgmentAlignment spot

Alignment markNG

(Overlaps with the OK

(Not in contact with OK

(In contact with the

Z direction judgmentWithin 0.75mm against the reference position

alignment mark.) the alignment mark.) alignment mark.)

(Z axis) (Y axis)

(X axis)

2mm or equivalent 19R-TRK1P-0-0809-02

2-5-2 Non-contact meter unitThe principle of this instrument is to blow an instantaneous jet of compressed air on the cornea, then to calcu-late the intraocular pressure from the numerical value of the cylinder pressure required to make the cornea toa certain plane surface area.Measurement method is as follows.Measurements are made by blowing an air jet on the cornea of the patient's eye, determining the amount of thechange in shape from the change in the amount of the light reflected and detecting the condition at the instantof applanation.The jet of air blown on the patient's eye causes the cornea to change its shape in the sequence in the followingfigure.

The change in shape is measured from the difference between the received light from the infrared LED andthe reflected light detected by the intensitometer.The reflected light to the applanation sensor is weak when the cornea is spherical (in the following figure atthe left). When the cornea is made to a certain plane surface area (in the following figure at the right), themaximum reflected light is detected.

Cornea

Convex Plane Concave Plane Convex

Applanation sensor

Alignment/applanation LED

NozzleEye 20R-TRK1P-0-0809-02

The pressure of the air jet increases together with the chamber inner pressure (CP), which is continuouslymeasured by the pressure sensor. The intensity of the light reflected on the cornea (L) is detected by the inten-sitometer as the function of the chamber inner pressure (CP). (Refer to the following figure.) Using the func-tion in the figure, L=f (CP), the chamber inner pressure (Pc) is determined for the maximum reflected lightintensity (Lmax). The intraocular pressure (IOP) is determined according to the obtained chamber inner pres-sure (Pc).

Corneal thickness measurement principlesSlit light is slantingly emitted for the patient's cornea and the light reflected by the front and backside of thecornea is brought in by the line sensor.The corneal thickness is calculated by using the interval (L) between the front reflection image and backsidereflection image on the line sensor.

Am

ou

nt o

f ref

lect

ion

ligh

t

Chamber inner pressure

Backside of cornea Front of cornea

Reflected

Backside reflection

CornealSlit light

Line sensor

Front reflection

L

light

thickness 21R-TRK1P-0-0809-02

2-6 Measurement procedure2-6-1 General operation flow chart

Power switch ON

REF

R/K KRT

OFF

ON

ON

OFF

ON

OFF

OFF

R/K T/P

OFF

ON

ON

T/P PACHO

TONO

Menu SW

Initial menu is set.

Hardware is initialized.

The title screen is displayed.

Mode is set.

The anterior eye sectionobservation screen is displayed.

R/K mode

Mode selector SW

Measurement mode SW

T/P is changed to R/K.

The measurementmode is selected.

The R/K mode screen is displayed.

The REF mode screen is displayed.

The KRT mode screen is displayed.

R/K is changed to T/P.

The anterior eye sectionobservation screen is displayed.

T/P mode

The T/P mode screen is displayed.

Mode selector SW

Measurement mode SW

The measurement mode

is selected.

The TONO mode screen is displayed.

The PACHO mode screen is displayed.

2

1 3

4 22R-TRK1P-0-0809-02

IOL SW

ON

OFF

OFF

OFF

OFF

ON

ON

ON

ON

OFF

OFF

OFF

OFF

OFF

OFF

ON

Exists.

Not exist.

ON

ON

ON

ON

1

Measurement SW

RL selector SW

The patient's eye is measured.

The measurement data are displayed.

The right and left positions inthe measuring unit are changed.

Print SW

Printer outputs the data.

External communication is set.

Data are outputted.

Alignment SW

Auto-alignment measurement/manual measurement is changed.

Target image SW

Memory image

The target image is displayed.

Menu SW

Menu mode

Switch selector SW

Switch menu is changed.

IOL mode is changed.

Fixation target SW

Fixation target brightness is changed. 23R-TRK1P-0-0809-02

ON

OFF Exists.

Not exist.

ON

OFF

ON

OFF

Clear SW

Measurement data

Data are erased.

Corneal diameter SW

Corneal diameter measurement mode

Chinrest up/down SW

Chinrest up/down movement

2 24R-TRK1P-0-0809-02

ON

OFF

OFF

OFF

OFF

OFF

OFF

OFF

OFF

OFF

OFF

ON

ON

ON

OFF

ON

ON

ON

ON

ON

ON

ON

Measurement SW

The patient's eye is measured.

RL selector SW The measurement data are displayed.

The right and left positions in themeasuring unit are changed.

Print SW

Printer outputs the data.

External communication is set.

Data are outputted.

Alignment SW

Auto-alignment measurement/manual measurement is changed.

Initial SW

The measuring unit is reset to the original point.

Menu SW

Menu mode

Switch selector SW

Switch menu is changed.

Clear SW

Measurement data

Data are erased.

30/60 selector SW

The measurement range is changed.

Chinrest up/down SW

Chinrest up/down movement

4

3 25R-TRK1P-0-0809-02

2-6-2 Auto-alignment flow chart

T/P

R/K

NG

OK

NG

OK

OK

NG

NG

NO

YES

NO

YES

YES

NO

YES

YES

YES

NONO

NO

NO

NO

YES

YES

Mode

The anterior eye section image iscaptured to judge XY alignment.

The center of gravity for the center spot is detected.

The center of gravity is calculated.


The center spot is rechecked.

The anterior eye section image iscaptured to judge Z alignment.The kerato ring LED lights.

Radius of the kerato No. 1 ring

The radius calculation in 0/180 is OK.

No. 1 ring is calculated.

The parallel projection spot is

detected.

The ring spot ratio is calculated.

The Z distance is calculated accordingto the ratio.

Z distance: Within 0.75mm

XY motor is driven.

"TOO CLOSE"" " Dotted line bar is displayed.

XY distance: Within 0.1mm

Z motor is driven.

XY motor is driven.


Z motor is driven.

XY motor is driven.

"FORWARD"Solid line bar is displayed.

4 3

2

3

3

4

-5mm Z < -3.0mm

-3.0mm Z < -0.75mm

+0.75mm < Z +3.0mm

+3.0mm < Z +5.0mm

The center spot is extracted.

The XY movement distance iscalculated according to the pixelsto the center. (Unit: mm)


Measurement 26R-TRK1P-0-0809-02

R/K

T/P

YES

NO

The anterior eye section imageis captured.

The bright spot area in the anterioreye section illumination is detected.

Bright spot area

The bright spot is judged.

The XY direction movementis calculated.

X direction movementMovement is finished.

XY rough alignment is finished.

Y direction movement

Measuring unit moves. (X direction) Measuring unit moves. (Y direction)

The anterior eye section image is captured.

Mode

Kerato ring contrast is calculated. X bright spot contrast is calculated.

Contrast is maximal.

Z direction movement is calculated.

Z rough alignment is finished.

Movement is finished.

Z direction movement

Measuring unit moves. (Z direction)

Not exist.

Exists.

3

4

4 27R-TRK1P-0-0809-02

OK

OK

OK

OK

OK

OK

NO

YES

2

The center spot is detected bythe two-dimensional PSD.

NG (Out of range) Within the XY rough

alignment rangeNo spot


The center spot position is detected.


alignment rangeNo spot


The anterior eye section illuminationposition is detected.


alignment range

No illumination image

XY motor is driven.


NG (Out of range) Within the XY roughalignment range

No spot

XY motor is driven.

Line sensor detection

NG (Out of range)Within the Z alignment range

No spot

Z motor is driven.


The center spot position is detected.

Does the spot exist?

Spot shapeVertical oval

Horizontal oval

Forward movement Backward movement

NG (Out of range)Within the X/Y/Z alignment range

Measurement 28R-TRK1P-0-0809-02

2-6-3 Manual alignment flow chart

NG

OK

NG

NG

OK

OK

NO

NO

NO

ON

YES

YES

YES

OFF

T/P

R/K

NO

YES

YES

NO

Mode

The anterior eye section image iscaptured to judge XY alignment.

The center spot is extracted.

The center of gravity forthe center spot is detected.


The XY movement distance iscalculated according to the pixels tothe center. (Unit: mm)

The anterior eye section image iscaptured to judge Z alignment.The kerato ring LED lights.

Radius of the kerato No. 1 ring

The No. 1 ring diameter is detected.

The parallel projection spot is

detected.

The ring/spot ratio is calculated.

The Z distance is calculated accordingto the ratio.

Z distance: -5.0mm Z < -3.0mm

Z distance: -3.0mm Z < -0.75mm

Z distance: +0.75mm < Z +3.0mm

Z distance: +3.0mm < Z +5.0mm

Z distance: +5.00mm or more

Measurement SW

"TOO CLOSE"Dotted line bar is displayed.

"TOO CLOSE" is erased.Dotted line bar is displayed.

"FORWARD" is erased.Solid line bar is displayed.

"FORWARD"Solid line bar is displayed.

Message and bar are erased.

The measurement result is displayed.

Measurement

2

12 29R-TRK1P-0-0809-02

NG

OK

OK

OK

NG

ON

OFF

1


Within the XY rough alignment

range


Within the XY fine alignment

range

Line sensor detection

The Z alignment position is checked.

Alignment bar is displayed. Alignment bar is erased.

Measurement SW

Measurement

The measurement result is displayed. 30R-TRK1P-0-0809-02

2-7 Layout diagrams for PCB2-7-1 POWER PCB (41850 6200)

Volume

Check pins

VR1: For adjusting the +7.5V power supply voltage VR4: For adjusting the +15V power supply voltageVR2: For adjusting the +5V power supply voltage VR5: For adjusting the X axis jog sensor voltageVR3: For adjusting the +15V power supply voltage VR6: For adjusting the Z axis jog sensor voltage

TP1: GND TP9: Encoder output A TP20: Y upper limitTP2: +24V TP10: Encoder output B TP21: Y lower limitTP4: +15V TP11: X axis jog sensor adjustment voltage TP22: Y zeroTP5: VDD (+5V) TP13: Z axis jog sensor adjustment voltage TP23: X zeroTP6: +3.3V TP17: Rough/fine movement TP24: Z zeroTP7: CCD +15V TP18: +1.5VTP8: +5VB (+7.5V) TP19: Resetting

84

,,

62,,,,,,

62

,

,62

62

5962

62

62 62

62

84

,,,

,

,62

6284

6284

,

, ,

6262

,,

,,

62

62

6262

84

62

,

84

62

Z axis jog sensor

X axis jog sensor

Rough/fine movement changing sensor

Encoder sensor

Z axis zero detection sensor

X axis zero detection sensor

Y axis upper limit sensor

Y axis zero detection sensor

Y axis lower limit sensor

Switching power supplyP51

PRINTER PCBJ642

PRINTER PCBJ641

CONTROL PCBJ2

CHINREST PCBJ651

CONTROL SW PCBJ611

RS-232C INCONTROL PCBJ12

USB I/F CABLE

RS-232C OUT

MOTOR DRIVER PCBJ632

MOTOR DRIVER PCBJ631 31R-TRK1P-0-0809-02

2-7-2 MOTOR DRIVER PCB (41850 6300)

2-7-3 PRINTER PCB (41850 6400)

TP1: GND TP7: X_DIR TP13: Z_HOLDTP2: +24V TP8: Z_DIR TP14: Y_HOLDTP3: X_CLK TP9: X_ENABLE TP15: VDD (+5V)TP4: Z_CLK TP10: Y_ENABLETP5: Y_CLK TP11: Z_ENABLETP6: Y_DIR TP12: X_HOLD

62 62

6262

,

,62

,

626262

62

6262

626262

62,,,

POWER PCBJ604

POWER PCBJ605

Y axis motorZ axis stepping motor

X axis stepping motor

,

,

,,

POWER PCBJ622

POWER PCBJ606

PRINTER

PRINTER 32R-TRK1P-0-0809-02

2-7-4 CONTROL SW PCB (41850 6450)

2-7-5 CHINREST PCB (41850 6500)

VR1: For adjusting the motor outputTP1: GND

POWER PCBJ613

Measurement SW

.'&5959

,,

84

62

,

,

,

POWER PCBJ614

Motor 33R-TRK1P-0-0809-02

2-7-6 CONTROL PCB (41850 71000)

DIP switch

Volume

Test pins

SW4: Reset switch SW5: Mode selector switch SW6: E2PROM writing switch

VR1: For adjusting the tilt angle of the pressure rising curve (52)

VR2: For adjusting the tilt angle of the pressure rising curve (65)

TP1: CCD 15V TP8: 15V TP15: 3.3VATP2: VCC TP9: +1.5V TP16: 15VATP3: 5VA TP10: +12V TP17: DGTP4: AG TP11: -15V TP20: VIDEO IN2TP5: +1.5V TP12 VIDEO IN1TP6: DG TP13: CLK16MTP7: 3.3V TP14: RESET

84

,,

6262

6262

625-

+%

62

,

59

,

59

62

62

64

59

.

759

84

,

,

,,,

,

62

,

25

+%

+%

62

6262

62

62

62 62

62A#&+0

62

,

,

,

,

,

,

,, ,

, , ,,

59

59

,62

POWER PCBJ602

POWER PCBJ603

POWER PCBJ626

ANALOG I/F PCBJ205

LCD SW PCB2J521

LZM DRIVER PCBJ301

CCD unit (RM)CN1

LCD relay PCBJ531

CCD unit (CT)CN1

CCD unit (RM)CN5

CCD unit (CT)CN5

Head changing up-and-down motor

Head changing upper limit sensor

Head changing lower limit sensor

CCD unit (RM)CN2

Condenser

LINE CCD PCBJ651

LINE CCD PCBJ652

Solenoid

Head changing back-and-forth motor

Head changing front limit sensor

EEPROM

Head changing rear limit sensor

CCD unit (CT)CN2 34R-TRK1P-0-0809-02

2-7-7 ANALOG IF PCB (41850 7200)

Volume

Check pins

VR1: For adjusting the reference voltage VR5: For adjusting the LED light intensity to mea-sure the corneal pressure

VR2: For adjusting the offset voltage VR6: For adjusting the XY LED light intensity

VR3: For adjusting the pressure detection circuitsensitivity

VR7: For adjusting the light intensity of the Z sen-sor/applanation sensor light source

VR4: For adjusting the applanation detection cir-cuit sensitivity

TP201: For checking the applanation detection circuit sensitivity voltage

TP406: AGND

TP202: APPLA_LVL TP407: DGNDTP204: For checking the pressure detection circuit

sensitivity voltageTP205: PRESSURE_LVLTP210: For checking the reference voltage

, ,,62

,8484

,

8484,

62

62

84

,,

8462

62

62)0&

848484

,

,

62

6262

84

84

CONTROL PCBJ4

PACHO LED

APPLANATION SENSOR PCB Z SENSOR PCB

PRESSURE SENSOR PCB

Anterior eye section illumination LED

Fixation LEDZ LED

XY LED 35R-TRK1P-0-0809-02

2-7-8 PRESS SENSOR PCB (41850 7310)

2-7-9 APPLA SENSOR PCB (41850 7320)

VR1: For adjusting the offset pressure

ANALOG I/F PCBJ204

84

ANALOG I/F PCBJ203

, 36R-TRK1P-0-0809-02

2-7-10 Z SENSOR PCB (41850 7330)

Volume

Test pins

2-7-11 LINE CCD PCB (41850 7340)

VR1: For adjusting frequencyVR2: For adjusting gainVR3: For adjusting frequencyVR4: For adjusting gain

TP331: For adjusting frequencyTP333: For adjusting frequencyTP335: GND

ANALOG PCBJ206

62

84

,62

84

62

84

84

62

62

CONTROL PCBJ14

CONTROL PCBJ15

2-7-12 LCD PANEL SW1 PCB (41850 7510)

2-7-13 LCD PANEL SW2 PCB (41850 7520)

2-7-14 LCD RELAY PCB (41850 7530)

595959595959

, ,

LCD PANEL SW2 PCBJ523

LCD RELAY PCBJ532

59,

5959,,

595984

LCD unitCONTROL PCB

J11LCD PANEL SW1 PCB

J512

,

,

,

LCD unit

CONTROL PCBJ13

LCD PANEL SW1 PCBJ511 38R-TRK1P-0-0809-02

2-7-15 LZM DRIVER PCB (41840 7300)

Volume

2-7-16 CCD camera (41820 6200)

VR1: For adjusting the fixation target light intensity (dark)

VR4: For adjusting the parallel projection spot 1light intensity

VR2: For adjusting the alignment spot light intensity

VR5: For adjusting the anterior eye section lightintensity

VR3: For adjusting the fixation target light intensity (bright)

VR6: For adjusting the parallel projection spot 2light intensity

J306

J303

J311

VR5

VR4 VR6 VR2

J301

J309 J304 J312 J302 J310 J307 J305 J308

VR3 VR1

Open air motor unit:4 pins

Rotary shutter:2 pins

TF motor:6 pins

Fixation target tungsten lamp:3 pins

Measurement LED:2 pins

Zero position detection sensor:3 pins

SPOT LED:2 pins

SPOT LED:4 pins

S RING 2 LED: 2 pins

S RING 1 LED: 2 pins

CONTROL PCBJ3

CONTROL PCBJ6 (RM), J9 (CT)



CN2

CN1

CN5 39R-TRK1P-0-0809-02

3. REPAIR WORK3-1 Inspection and adjustment proceduresThese are the procedures for the adjustment carried out when the customer purchases a new auto kerato-refracto-tonometer or before returning one to the customer after repairs. Of particular importance is the needto check after repairs that new problems have not developed in areas other than that just repaired.

3-1-1 Self-check[Procedure](1) Set the DIP switch No. 3 of SW5 to ON on the CONTROL PCB as shown in the above figure. Turn on

the power of the instrument.(2) The results and states are displayed on the monitor, so check each indicator according to the instructions.

When NO GOOD is displayed or there is a malfunction, carry out the following procedure and repairthe instrument in accordance with 3-3 Trouble shooting.

Self-check

Procedure

Appearance check

Measurementaccuracy check

Operations check

Timer check

64

595959

, 7 .

,

,

,

25

8484

, ,595962

6262,

59,,

87654321 40R-TRK1P-0-0809-02

Self-check initial image

1. FROM TEST The FROM PCB and the CONTROL PCB address data bus line are checked.

2. RAM TEST The RAM area in the CONTROL PCB is checked.

INIT TEST1. FROM TEST2. RAM TEST3. EEROM USER4. EEROM PRTCT5. CAPTURE TV6. CAPTURE VI7. SWITCH TEST8. TIME SET NEXT -> MEAS.SW EXEC -> PRINT SW

INIT TEST9. RS232C TEST10. PRINT TEST11. ROTARY TEST12. TF MOTOR SET13. TARGET CHECK14. USB TEST15. XYZ TEST

NEXT -> MEAS.SW

FROM TEST

CHECK SUM

BA4A

Finished by Measurement switch.

RAM TEST

IC24

NOW READING... OK

A8000027:7F:75 41R-TRK1P-0-0809-02

3. EEROM USER The EEROM for initial setting in the CONTROL PCB is checked.

4. EEROM PRTCT The EEROM for compensation values in the CONTROL PCB is checked.

5. CAPTURE TV Accumulation of the anterior eye section observed images (including the keratoimage) is checked. (8 images)

EEROM USER

NOW READING... OK

NEXT -> MEAS.SW

EEROM PRTCT

IC24

NOW READING... OK

NEXT -> MEAS.SW

B4001007:4E:15

CAPTURE TV

BLK 0

NEXT MEAS.SW

* Whether 8 images are taken or not is checked.If they are taken, it is normal. 42R-TRK1P-0-0809-02

6. CAPTURE V1 Accumulation of the anterior eye section observed images (including the keratoimage) is checked. (8 images)The difference from 5. CAPTURE TV is that the integral time is increased by0.3.

7. SWITCH TEST The control circuits of the CONTROL SW PCB, LCD PANEL SW1 PCB andLCD PANEL SW2 PCB are checked.

CAPTURE V1

BLK 0

NEXT MEAS.SW

* It is normal if the screen is gradually brighterbecause the images are taken.

SWITCH TEST

F2: CHIN_L: X ZERO: F1: CHIN_H: Y ZERO: F3: MEAS.SW: Z ZERO: SubF4: HEADER: Y UP: SubF3: PAPER: Y DOWN: SubF2: CUTTER: SubF1: SubF0:DIP SW:3

* It is normal if * is displayed when pressingthe selected switch.

* Keep pressing MEAS. SW until the buzzersounds to exit from this TEST.

F1 F2 F3

SubF0 SubF1 SubF2 SubF3 SubF4 43R-TRK1P-0-0809-02

8. TIME SET The TIMER control circuit in the CONTROL PCB is checked.

9. RS232C TEST The input terminal of RS232C, the cable and the RS232C control circuit in theCONTROL PCB are checked.

10. PRINT TEST The PRINTER UNIT is checked.

TIME SET

INT MEAS.SW

NO INIT PRINT.SW

RS232C TEST

OUTPUT DATA

INPUT DATA

NEXT -> MEAS.SW

PRINT TEST

NEXT -> MEAS.SW

* Press MEAS. SW once, and the data areprinted.Press it once more, and the instrument exitsfrom PRINT TEST. 44R-TRK1P-0-0809-02

11. ROTARY TEST The operation of the open air motor is checked.

12. TARGET CHECK The target image is checked. (The rotary speed of the open air motor can bechanged.)

13. USB TEST The USB communication function is checked by using the special software.

ROTARY TEST

ROTARY OFF

PRINT SW -> ROTARY ON

MEAS.SW -> EXIT

ROTARY OFF : The open air motor stops.ROTARY ON : The open air motor rotates.

TARGET CHECK

T ON:080MS T OFF:400MS

SubF0:UP,SubF4:DOWN MEAS.SW:DATA SET/EXIT

USB TEST

ATTACH USB CABLE NEXT -> MEAS.SW 45R-TRK1P-0-0809-02

14. XYZ TEST The operation of the auto-drive unit is checked.

XYZ TEST

X MOTOR DRIVE OK Y MOTOR DRIVE OK Z MOTOR DRIVE OK Y MOTOR UP DRIVE OK Y MOTOR DOWN DRIVE OK

PRINT SW > TEST START MEAS.SW > EXIT 46R-TRK1P-0-0809-02

3-1-2 Measurement accuracy check(1) Fix the test eyes for tools on the chinrest and measure each of them in order, confirming that the values are

within the limits listed below.(However, when the measured values exceed the accuracy limits, re-correct the setting.)

(2) Also check the diopter value of the accessory test eyes at this time.Method of appraisal:a. The typical values should be obtained after measuring the power and axial angle five times.b. The fluctuation is the fluctuation width after measuring five times.c. Measure by 0.12 steps.

Spherical test eyeUnit: diopter

Note: Use care concerning alignment for the spherical accuracy.

Astigmatic test eyeUnit: diopter

Test eye Spherical power Fluctuation Residual astigmatism Fluctuation0 to 10 0.25 0.12 0.12 0.1210 to 15 0.37 0.12 0.12 0.12

15 to -22+25 0.50 0.12 0.25 0.12

Test eye Spherical power Fluctuation Axial angle Fluctuation0.25 to 1 0.25 0.12 5 51 to 3 0.25 0.12 5 53 to 8 0.25 0.12 5 5 47R-TRK1P-0-0809-02

3-1-3 Checking accuracy of kerato-use measurement(1) Fix the test eyes for kerato tool on the chinrest and measure each of them in order, confirming that the val-

ues are within the limits listed below.(However, when the measured values exceed the accuracy limits, re-correct the setting.)

(2) Also check the radius of curvature of the accessory test eye at this time.Method of appraisal:a. The typical values should be obtained after measuring the radius of curvature and the difference

between H and V axial angles five times.b. The fluctuation is the fluctuation width after measuring five times.

(However, there should be a separate judgment for H and V.)

Spherical test eyeUnit: mm

Astigmatic test eye

3-1-4 Checking accuracy of tonometer-use measurement(1) Fix the test eyes for tonometer tool on the chinrest and measure each of them in order, confirming that the

values are within the limits listed below.(However, when the measured values exceed the accuracy limits, re-correct the setting.)

(2) Checking the intraocular pressure measurementMethod of appraisal:Align the center of the test eye, measure it ten times and make sure that the measured values are within thefollowing standard values.

|Reference value - Average of the ten measured values| 2.5Less than the reference value 30 : 0 - 30mmHg rangeReference value 30 or more : 0 - 60mmHg range

(3) Checking the accuracy of the corneal thicknessMethod of appraisal:Measure each of the test eyes having five types of thickness five times and make sure that the measuredvalues are within the following standard values.

Within the reference value 0.01mm (The test eye thickness is less than 0.6mm.)Within the reference value 0.025mm (The test eye thickness is 0.6mm or more.)

Test eye Radius of curvature Fluctuation Difference between H and VR5 to R10 0.03 0.03 0.03

Test eye Radius of curvature Fluctuation Astigmatic axial angle FluctuationRadius of curvature:0.5mm or more 0.05mm 0.03mm 2 2 48R-TRK1P-0-0809-02

3-2 Disassembly and assembly proceduresRemoving the chinrest

Illu

stra

tion

Proc. Disassembly Removal method Point for assembly

1 Removal of chinrest Remove the cover cap . Remove the screw . Remove the chinrest cover . Remove the chinrest cable . Remove the screw . Remove the earth cable . Remove the four screws . Remove the chinrest .

Assemble the unit in thereversed procedure of dis-assembly.

1

4

23

8

6

5

7

1 2

3

4

5

6

7

8

1 49R-TRK1P-0-0809-02

Removing the covers (1)Ill

ustr

atio

n


1 Removal of middlecover (right)

Remove the two cover caps . Remove the two screws . Remove the middle cover (right) .

Assemble the units in thereversed procedure of dis-assembly.

2 Removal of middlecover (left)

Remove the two cover caps . Remove the two screws . Remove the middle cover (left) .

3 Removal of front cover Remove the two cover caps . Remove the two screws . Remove the front cover .

4 Removal of monitorback cover (rear)

Remove the four screws . Remove the monitor back cover .

9 8

46

5

5 67

8 9

12

3

23

10

11

1

2

3

1

4

5

6

4

7

8

9

7

10

11

10 50R-TRK1P-0-0809-02

Removing the covers (2)Il

lust

ratio

n


5 Removal of head cover(right)

Remove the two cover caps . Remove the four screws . Remove the head cover (right) .


6 Removal of head cover(left)

Remove the four screws . Remove the head cover (left) .

7 Removal of base cover(right)

Remove the three screws . Remove the base cover (right) .

8 Removal of base cover(left)

Remove the two screws . Remove the base cover (left) .

13

14

12

14

181719

20

16

15

16

12

13

14

12

15

16

15

17

18

17

19

20

19 51R-TRK1P-0-0809-02

Removing the covers (3)Il

lust

ratio

n


9 Removal of base cover(front)

Remove the three screws . Remove the base cover (front) .


21

22

22

22

21

22

21 52R-TRK1P-0-0809-02

Removing the POWER PCB/switching power supplyIl

lust

ratio

n


1 Removal of POWERPCB

Remove the cables from the POWERPCB.

Remove the five screws . Remove the POWER PCB .


2 Removal of switchingpower supply

Remove the four screws . Remove the POWER PCB mounting

plate . Remove the cables from the switching

power supply. Remove the four screws . Remove the switching power supply

and the insulation sheet .

1

2

2

2

3

4

4

4

5

6

7

1

2

1

3

4

5

6

3

7 53R-TRK1P-0-0809-02

Removing the motor driver PCBIll

ustr

atio

n


1 Removal of motor driverPCB

Remove the cables from the motordriver PCB.

Remove the five screws . Remove the motor driver fixing plate

.

Remove the six screws . Remove the motor driver PCB .


1

2

2

3

4

1

2

3

4

1 54R-TRK1P-0-0809-02

Removing the KR unit (1/3)Il

lust

ratio

n


1 Removal of outer frame Remove the anterior eye section illumi-nation LED cable.

Remove the eleven screws . Remove the outer frame .


2 Removal of KR baseplate

Remove the snap pin and thenremove the connecting pin .

Remove the two bearing shafts . Remove the four screws . Remove the KR base plate .

1

2

2

2

3

4

5

6

7

1

2

1

3

4

5

6

7

3 55R-TRK1P-0-0809-02


lust

ratio

n


3 Removal of KR measur-ing unit

Remove the cables from the KR measur-ing unit.

Remove the four screws . Remove the KR measuring unit .


4 Removal of control PCB Remove the cables from the controlPCB.

Remove the four screws . Remove the control PCB .

5 Removal of analog PCB Remove the cables from the analogPCB.

Remove the four screws . Remove the analog PCB .

8

9

9

10

11

12

13

8

9

8

10

11

10

12

13

12 56R-TRK1P-0-0809-02


lust

ratio

n


6 Removal of covermounting plate

Remove the two screws . Remove the KR cover mounting plate

.


7 Removal of KR cover Remove the three screws . Remove the KR cover .

8 Removal of KR unit Remove the four screws . Remove the PCB plate . Remove the KR unit .

14

14

15

16

17

18

19

19

20

14

15

14

16

17

16

18 19

20

18 57R-TRK1P-0-0809-02

Removing the LZM PCB/CCD unitIl

lust

ratio

n


1 Removal of LZM PCB Remove the cables from the LZM PCB. Remove the four screws . Remove the LZM PCB .


2 Removal of CCD camera Remove the cables from the CCD cam-era.

Remove the three screws . Remove the CCD camera .

1

2

3

4

1 2

1

3

4

3 58R-TRK1P-0-0809-02

Removing the CT unitIl

lust

ratio

n


1 Removal of CT unit Remove the cables from the CT unit. Remove the three screws . Remove the CT unit .


1

2

1

2

1 59R-TRK1P-0-0809-02

Removing the head changing sensorsIl

lust

ratio

n


1 Removal of head chang-ing front limit sensor

Remove the two screws . Remove the head changing front limit sen-

sor .


2 Removal of head chang-ing rear limit sensor

Remove the two screws . Remove the head changing rear limit sen-

sor .

Do not remove the sensorfixing plate.

3 Removal of head chang-ing upper limit sensor

Remove the two screws . Remove the head changing upper limit

sensor .

4 Removal of head chang-ing lower limit sensor

Remove the two screws . Remove the head changing lower limit

sensor .

1

2

3

4

5

6

7

8

1

2

1

3

4

3

5

6

5

7

8

7 60R-TRK1P-0-0809-02

Removing the head changing motorsIl

lust

ratio

n


1 Removal of head up-and-down motor

Remove the two screws . Remove the three screws . Remove the head up-and-down motor

.


2 Removal of head back-and-forth motor

Remove the two screws . Remove the three screws . Remove the head back-and-forth motor

.

1

3

4

5

6

2

1

2

3

1

4

5

6

4 61R-TRK1P-0-0809-02

Removing the monitor unitIl

lust

ratio

n


1 Removal of monitor unit Remove the cables from the monitorunit.

Remove the four screws . Remove the monitor unit .


2 Removal of tilt unit Remove the four screws . Remove the tilt unit .

1

2

3

4

1

2

1

3 4

3 62R-TRK1P-0-0809-02

Removing the monitor coversIl

lust

ratio

n


1 Removal of monitorcover (rear)

Remove the four screws . Remove the monitor cover (rear) .


2 Removal of monitorcover (front)

Remove the four screws . Remove the monitor cover (front) .

1

2

3

4

4

1

2

1

3

4

3 63R-TRK1P-0-0809-02

Removing the LCDIl

lust

ratio

n


1 Removal of LCD relayPCB

Remove the two screws . Remove the LCD relay PCB . Remove the cables from the LCD relay

PCB.


2 Removal of inverter unit Remove the cables from the inverter unit. Remove the two screws . Remove the inverter unit .

3 Removal of LCD unit Remove the four screws . Remove the LCD unit .

1

2

3

4

5

6

6

1

2

1

3 4

3

5 6

5 64R-TRK1P-0-0809-02

Removing the LCD panel SW PCB'sIl

lust

ratio

n


1 Removal of LCD panelSW PCB 1

Remove the cables from the LCD panelSW PCB 1.

Remove the three key tops . Remove the two screws . Remove the LCD panel SW PCB 1 .


2 Removal of LCD panelSW PCB 2

Remove the cables from the LCD panelSW PCB 2.

Remove the five key tops . Remove the two screws . Remove the LCD panel SW PCB 2 .

1

2

3

5

6

1

2

3

1

4

5

6

4 65R-TRK1P-0-0809-02

Removing the printer unit/printer PCBIl

lust

ratio

n


1 Removal of printer unit Remove the three screws . Remove the four screws . Remove the printer unit .


2 Removal of printer PCB Remove the three screws . Remove the printer PCB .

32

5

1

4

1

2

3

1

4

5

4 66R-TRK1P-0-0809-02

Removing the control lever unitIl

lust

ratio

n


1 Removal of control leverunit

Remove the cables from the controllever unit.

Remove the three screws . Remove the control lever unit .


1

2

2

1

2

1 67R-TRK1P-0-0809-02

Removing the changing mechanism unitIl

lust

ratio

n


1 Removal of changingmechanism unit

Remove the cables from the changingmechanism unit.

Remove the four screws . Remove the changing mechanism unit

.


1

2

2

1

2

1 68R-TRK1P-0-0809-02

Removing the auto-drive unitIl

lust

ratio

n


1 Removal of auto-driveunit

Remove the cables from the auto-driveunit.

Remove the five screws . Remove the auto-drive unit .


When mounting the unit,push it against the refer-ence surface and fix it.

1

2

2

Reference surface for mounting

Reference surface for mounting

1

2

1 69R-TRK1P-0-0809-02

Removing the Y drive unitIl

lust

ratio

n


1 Removal of Y drive unit Remove the cables from the Y driveunit.

Remove the four screws . Remove the Y drive unit .


1

22

1

2

1 70R-TRK1P-0-0809-02

Removing the Y drive motorIl

lust

ratio

n


1 Removal of Y drivemotor

Remove the four screws . Loosen the two set screws . Remove the pulley . Remove the motor fixing plate . Remove the four screws . Remove the Y drive motor .


When mounting the Ydrive motor, hang the tim-ing belt on the pulley andpull the motor with 24.5N,using a spring balance.Under this condition, fixthe Y drive motor.

1

2

3 4

5

6

Pull the motor with 24.5N.

1

2

3

4

5

6

1 71R-TRK1P-0-0809-02

Removing the upper/lower limit sensors/center sensorIl

lust

ratio

n


1 Removal of upper limitsensor

Remove the two screws . Remove the upper limit sensor .


2 Removal of lower limitsensor

Remove the two screws . Remove the lower limit sensor .

3 Removal of center limitsensor

Remove the two screws . Remove the center sensor .

1

2

34

5

6

1

2

1

3

4

3

5

6

5 72R-TRK1P-0-0809-02

Removing the nozzle unitIl

lust

ratio

n


1 Removal of nozzle unit Turn the special tool counterclockwiseand remove the retainer ring .

Pull out and remove the nozzle unit .


1

2

Special tool

1 2

1 73R-TRK1P-0-0809-02

Removing the CCD cameraIl

lust

ratio

n


1 Removal of CCD camera Remove the cables from the CCD cam-era.

Remove the three screws . Remove the CCD camera unit .


Special tool1

2

1

2

1 74R-TRK1P-0-0809-02

Removing the sensor PCB's (1/2)Il

lust

ratio

n


1 Removal of Z SENSORPCB

Remove the cables from the Z SENSORPCB.

Remove the three screws . Remove the Z SENSOR PCB .


2 Removal of LINE CCDPCB

Remove the cables from the LINE CCDPCB.

Remove the four screws . Remove the LINE CCD PCB .

3 Removal of APPLE SEN-SOR PCB

Remove the five screws . Remove the shield plate . Remove the cables from the APPLE

SENSOR PCB. Remove the two screws . Remove the APPLE SENSOR PCB .

1

2

3

4

5

6

7

8

1

2

1

3

4

3

5

6

7

8

5 75R-TRK1P-0-0809-02

Removing the sensor PCB's (2/2)Il

lust

ratio

n


4 Removal of PRESSSENSOR PCB

Remove the cables from the PRESSSENSOR PCB.

Remove the three screws . Remove the PRESS SENSOR PCB .


1

2

1

2

1 76R-TRK1P-0-0809-02

Removing the LED unitIl

lust

ratio

n


1 Removal of FIX LEDUNIT

Remove the two screws . Remove the FIX LED UNIT .


2 Removal of XY LEDUNIT

Remove the two screws . Remove the XY LED UNIT .

When mounting the LED,push it in the arrow direc-tion.

3 Removal of PACHO LEDUNIT

Remove the two screws . Remove the PACHO LED UNIT .

4 Removal of Z LED UNIT Remove the two screws . Remove the Z LED UNIT .

1

2

3

4

5

6

7

8

1

2

1

3

4

3

5

6

5

7

8

7 77R-TRK1P-0-0809-02

Removing the cylinder unitIl

lust

ratio

n


1 Removal of cylinder Remove the four screws . Remove the cylinder .


2 Removal of piston unit Using the tool hole made on the connect-ing shaft, turn the piston unit counter-clockwise to remove it.

3

1

2Tool hole

Tool hole

1 2

1

3 3 78R-TRK1P-0-0809-02

3-3 Trouble shooting

1. Troubles related with the power supply The POWER lamp does not light up. The LCD is not bright enough.

2. Troubles related with the LCD Nothing is displayed. The screen is moving. (Synchronization is impossible.) The anterior eye section observed image is not displayed.

3. Troubles related with measurementKR NO TARGET is displayed. OVER-SPH is displayed. OVER-CYL is displayed. ERROR is displayed. OVER-R is displayed. NO CENTER is displayed.

CT The air does not blow automatically. The data with ( ) or ERROR is displayed. The measured value is not correct. There is fluctuation between the measured values. OVER is displayed.

4. Troubles related with printer No printing PAPER END is kept displayed. CLOSE PRINTER COVER... is kept displayed. The printer is noisy in operation.

5. Others The fixation target is not visible. The PD value is not printed (or is not correct). The chinrest does not operate. KR and CT are not changed to each other. The auto-drive unit does not operate. NG+ or NG- is displayed when checking air. Initial operation is not done. (The message is displayed during the initial operation.) The head does not operate though you tilt the control lever. The driving speed is not changed though you slide the control lever. The instrument keeps driving though you do not operate the control lever. 79R-TRK1P-0-0809-02

The function switches do not work. The chinrest up/down switch does not work. The measurement switch does not work. 80R-TRK1P-0-0809-02

3-3-1 Troubles related with the power supply

CHECK POINT

The POWER lamp does not light up. +3.3V is not outputted.

Check if LED 5 of the POWERPCB lights up and the voltage (TP6: +3.3V).

When it is OK: Check the wiring to the control SWPCB.

When it is NG: Check the wiring or check the switchingpower supply voltage (+24V).

CONTROL SW PCBPOWER PCB

5+5&

.'&.'&

62

,,

,

&)&)

8

8

8

&)

&)

8

POWER LAMP 81R-TRK1P-0-0809-02

CHECK POINT

The LCD is not bright enough. There is not the power supply (+12V) to the LCD.

Check No. 4, 5, 6 (+24V), GND(+24V 5%) of No. 1, 2, 3 onJ601 and if LED 1 lights up. Check the voltage (+24V) between No. 3 and No. 6 on J603.

When it is NG: Check the wiring. Replace the switching power supply.

Check if LED 1 of the CONTROL PCB lights up and thevoltage (TP10: +12V).

When it is NG: Check the wiring of the CTPL-POWER cable. Replace the CONTROL PCB.

When it is OK: Replace the LCD.

TO LCD

CONTROL PCBPOWER PCB

+55.(

62

.'&

8

,

&)&)

8

.'&

,,

&)

8%%&

8

8

8&)

8

,

&)&)

8

8

8

&)

1

2 82R-TRK1P-0-0809-02

3-3-2 Troubles related with the LCD

CHECK POINT

Nothing is displayed. There is not the power supply (+15V) to the CCD camera. The screen is moving. The connection of the CCD CLOCK cable 1 unit and the camera

image cable unit is faulty or the CONTROL PCB is faulty.

Check No. 4, 5, 6 (+24V), GND(+24V 5%) of No. 1, 2, 3 on J601 and if LED 3 lights up. Check the voltage (TP7: +15V).

When it is NG: Check the wiring. Replace the switching power supply.

Check the voltage (+15V) between No. 1 and No. 2 on J7(KR) or on J10 (CT).

When it is NG: Check the wiring. Replace the CONTROL PCB.

KR: Check the CCD CLOCKcable 1 unit.

CT: Check the CCD CLOCKcable 2 unit.

When it is OK: Replace the CONTROL PCB.

KR: Check the camera imagecable unit.

CT: Check the VM Cable Assy.


KR: Check the LCD-CONTROLcable 1 unit.

CT: Check the LCD-CONTROLcable 2 unit.


,

,

TO CCD (CT)

TO CCD (KR)

&)

&)

8

8

.'&

62

&)

&)

&)

&)&)

&)

+55.(

CONTROL PCBPOWER PCB

,,

&)

8%%&

8

8

8&)

8

,

&)&)

8

8

8

&)

Nothing is displayed.

1

2

The screen is moving.1

2

3 83R-TRK1P-0-0809-02

CHECK POINT

The anterior eye section observed image is not displayed.

The ANALOG PCB is faulty, the CONTROL PCB is faulty or the CCD camera is faulty.

KR unitCheck the rotary solenoid operationwith the LED lighting tool.

Check if the anterior eye sectionillumination LED unit lights up.

When it is OK: Replace the CONTROL PCB.When it is NG: Replace the anterior eye section

illumination LED unit or LZM PCB.

Turn on the power of the instrument,light the objective lens of the opticalhead with a penlight, etc. and checkif the LCD senses the light.

When it is NG: Replace the CCD camera.

CT unitCheck if the anterior eye sectionillumination LED unit lights up.

When it is OK: Replace the CONTROL PCB.When it is NG: Replace the anterior eye section

illumination LED unit or ANALOGPCB.

Turn on the power of the instrument,light the objective lens of the opticalhead with a penlight, etc. and checkif the LCD senses the light.

When it is NG: Replace the CCD camera.

LZM PCB

ANALOG PCB

52 .'& 2%$

,

,

,,

,

,

,

POWER PCB

CCD

CAMERA

RO

TA

RY

SO

LE

NO

ID

ANTERIOR EYE

SECTION

ILLUMINATION

LED PCB

IRIS

OPTICAL UNIT

KR unit* The LEDs and solenoids are controlled by SOFTWARE and are turned ON/OFF by the LZM PCB.* The rotary solenoid closes the light path (iris) only at the moment of measurement.

(Normally, the light path is opened.)

The anterior eye section observed image is not displayed.

1

2

3

1

2 84R-TRK1P-0-0809-02

3-3-3 Troubles related with measurementKR

NO TARGET is displayed.

The objective lens in the optical head is dirty.The measurement LED does not light.The control of the CCD camera unit is faulty.The image processing circuit is faulty.

OVER-SPH is displayed.

The objective lens in the optical head is dirty.The operation of the moving section in the optical head is faulty.The operation of TF MOTOR is faulty.The rotary solenoid operation is faulty.The image processing circuit is faulty.

OVER-CYL is displayed.

The objective lens in the optical head is dirty.The rotary solenoid operation is faulty.The image processing circuit is faulty.

ERROR is displayed. The objective lens in the optical head is dirty.The measurement LED does not light up.The control of the CCD camera unit is faulty.

OVER-R is displayed.

The objective lens in the optical head is dirty.The operation of the moving section in the optical head is faulty.The image processing circuit is faulty.

NO CENTER is displayed.

The objective lens in the optical head is dirty.The kerato LED and the parallel projection LED do not light up.The CCD camera unit is faulty.The image processing circuit is faulty.

CCD

CAMERA

CONTROL PCB LZM PCB

,

,

,

,

,

,

LCD

CPU

SDRAM

IMAGE

SIGNAL

CONTROL

SIGNAL

A/D

CONVERSION

GATE ARRAY

D/A CONVERSION

IMAGE

PROCESSING

CIRCUIT

CONTROL

SIGNAL

MEASUREMENT LED

ON/OFF BY

SOFTWARE 85R-TRK1P-0-0809-02

CHECK POINT

Check if the objective lens in theoptical head is dirty.Check the M LED PCB with theLED lighting tool.

When it is lit: The LZM PCB is faulty. Replace it.When it is not lit: The M LED PCB is faulty.

Return the optical head to the makerfor repair.

Self-check CAPTURE (VI mode) When it is OK: The image processing circuit is faulty.The CONTROL PCB is faulty. So, replace the PCB.

When it is NG: The contact of the CCD CLOCKcable 1 unit is faulty or the CCDcamera is faulty.

Check if the objective lens in theoptical head is dirty.Check the operation of the movingsection in the optical head.Self-check FROM, RAM CHECK When it is OK: Adjust the REF accuracy.

When it is NG: The CONTROL PCB is faulty. Replace it.

Replace the LZM PCB.

Check if the objective lens in theoptical head is dirty.Self-check FROM, RAM CHECK When it is OK: Adjust the REF accuracy.

When it is

TRK 1P RepairManual

Documents

Transcript of TRK 1P RepairManual