Huvitz CRK-8800 User manual

Service Manual
Auto Ref/Keratometer CRK-8800
Ver 1.0

----------------------------------------------------------------------------------------------- Auto Ref/Keratometer CRK-8800 1
Notice
This product may malfunction due to electromagnetic waves caused by portable personal
telephones, transceivers, radio-controlled toys, etc. Be sure to avoid having objects such
as, which affect this product, brought near the product.
The information in this publication has been carefully checked and is believed to be
entirely accurate at the time of publication. SHANGHAI HUVITZ assumes no
responsibility, however, for possible errors or omissions, or for any consequences
resulting from the use of the information contained herein.
SHANGHAI HUVITZ reserves the right to make changes in its products or product
specifications at any time and without prior notice, and is not required to update this
documentation to reflect such changes.
Important Notice
Potential electromagnetic or other interference between medical equipments and
other devices being operated together in the same environmental may expert an
adverse influence on functioning of the medical equipment. Non-medical
equipments not in compliance with the requirements of EN 60601-1 and EN
60601-1-2 should not be used together in the same environmental as the medical
equipments
This equipment has been tested and found to comply with the limits for medical devices in
IEC 60601-1-2:2001. These limits are designed to provide reasonable protection against
harmful interference in a typical medical installation
Power Cable
For use of equipment in rated voltage less than 125Vac, minimum 6A, Type SJT or SVT,
18/3AWG, 10A, max 3.0m long: One end with Hospital Grade Type, NEMA 5-15P other end
with appliance coupler. For use of equipment in rated voltage less than 250Vac, minimum 6A,
Type SJT or SVT, 18/3AWG, 10A, max 3.0m long: One end terminated with blade attachment
plug (HAR) Type, NEMA 6-15P.
SHANGHAI HUVITZ Co., Ltd.
No.188,Yuanguang Road,Baoshan ,Shanghai,China
All rights are reserved.
Under copyright laws, this manual may not be copied, in whole or in part, without the prior
written consent of SHANGHAI HUVITZ Co., Ltd.
!WARNING

----------------------------------------------------------------------------------------------- Auto Ref/Keratometer CRK-8800 2
Contents
1. Introduction...........................................................................3
2. Safety Information ................................................................4
2-1 Overview ........................................................................4
2-2 Safety Symbol................................................................5
2-3 Environmental Considerations .......................................6
2-4 Safety Precaution...........................................................7
3. Product Outline.....................................................................9
3-1 Main parts ......................................................................9
3-2 Optical System..............................................................12
3-3 Electrical System ..........................................................15
3-4 Mode Setting................................................................22
3-5 Principles of Measurement ..........................................23
4. Repair Standard ..................................................................27
4-1.Checking and Control......................................................27
4-2.Disassembly and Assembly Procedure ...........................40
5. Troubleshooting..................................................................46
6. Technical Materials.............................................................53

----------------------------------------------------------------------------------------------- Auto Ref/Keratometer CRK-8800 3
1. Introduction
Auto Ref/Keratometer CRK-8800 is the equipment to provide the information of Spherical,
Cylindrical and Axis while measuring the refraction of examinee’s eyes. Auto Ref/Keratometer C
RK-8800 is the equipment that can measure the corneal curvature of examinee. In addition, it
can measure PD (=distance in between pupils) and pupil size. Especially, as it’s peripheral
(=corneal peripheral curvature) measurement is possible as measuring the corneal curvature of
examinee, it is possible to know the information on the corneal peripheral curvature as well as
the corneal core curvature, which enables the exact prescription for the examinee.
This equipment shall provide the optimal optometry information with the functions of IOL
(=measuring intraocular lens) and Retro-Illumination (=observing retro-illumination) to obtain an
optimal figure of the eyes’ state of examinee.
CLBC (Contact Lens Base Curve) measurement is also a basic function of this product

----------------------------------------------------------------------------------------------- Auto Ref/Keratometer CRK-8800 4
2. Safety Information
2-1 Overview
Safety is everyone’s responsibility. The safe use of this equipment is largely dependent upon
the installer, user, operator, and maintainer. It is imperative that personnel study and become
familiar with this entire manual before attempting to install use, clean, service or adjust this
equipment and any associated accessories. It is paramount that the instructions contained in
this manual are fully understood and followed to enhance safety to the patient and the
user/operator. It is for this reason that the following safety notices have been placed
appropriately within the text of this manual to highlight safety related information or
information requiring special emphasis. All users, operators, and maintainers must be familiar
with and pay particular attention to all Warnings and Cautions incorporated herein.
"Warning,” indicates the presence of a hazard that could result in severe personal
injury, death or substantial property damage if ignored.
NOTE
"Note,” describes information for the installation, operation, or maintenance of which
is important but hazard related if ignored.
“Caution” indicates the presence of a hazard that could result in minor injury, or
property damaged if ignored.
!WARNING
!CAUTION

----------------------------------------------------------------------------------------------- Auto Ref/Keratometer CRK-8800 5
2-2 Safety Symbol
The International Electro technical Commission (IEC) has established a set of symbols for
medical electronic equipment, which classify a connection or warn of any potential hazards.
The classifications and symbols are shown below.
I and O on power switch represent ON and OFF respectively.
Type B Isolated patient connection
It indicates the connection of signal input/output.
This symbol identifies a safety note. Ensure you understand the
function of this control before using it. Control function is described
in the appropriate User’s or Service Manual.
It indicates the year of manufacture and the manufacturer.
It indicates the hot surface.
It indicates the safe ground point connected to the chassis of
equipment. It is required to do the protective ground to the
conductive section in the equipment of class I for the purpose of
safety.
UL60601-1
CAN/CSA C22.2
NO.601.1
MEDICAL EUIPMENT
WITH RESPECT TO ELECTRIC SHOCK
FIRE AND MECHANICAL HAZARDS ONLY IN
ACCORDANCE WITH UL 60601-1, AND
CAN/CSA C22.2 NO.601.1
Disposal of your old appliance
1. When this crossed-out wheeled bin symbol is attached to a product it
means the product is covered by the European Directive 2002/96/EC.
2.All electrical and electronic products should be disposed of separately
from the municipal waste stream via designated collection facilities
appointed by the government or the local authorities.
3. The correct disposal of your old appliance will help prevent potential
negative consequences for the environment and human health.
4. For more detailed information about disposal of your old appliance,
please contact your city office, waste disposal service or the shop
where you purchased the product.
Alternating Current

----------------------------------------------------------------------------------------------- Auto Ref/Keratometer CRK-8800 6
2-3 Environmental Considerations
Please avoid the environment below for the operation and storage of the equipment.
Where the equipment is
exposed to water vapor.
Don’t operate the equipment
with wet hands.
Where the machine can
be exposed to the
chemical or flammable
substances.
Where the machine is
exposed directly to the
sunlight.
Please keep the
equipment out of dust
and do not let inserted
any metal parts such as
coins, clips, etc.
Where the temperature
changes frequently normal
temperature for operation
of the machine is at the
range of 10°C ~ 35°C, and
the humidity is at the
range of 30%~70%.
Do not disassemble or
open the machine. The
manufacture shall have no
responsibility for any
problems caused by these.
Where any heaters are at the
close distance to the
machine.
Do not close the thermal
ventilation outlet.
Where the humidity is high
and there are problems to
the heat dissipation and/or
ventilation
Do not connect the AC
power plug into the
outlet while not putting
the parts of machine
together completely. It
can harm the
equipment.
Where the equipment is
subject to excessive
shocks or Vibrations.
Do not pull the plug out
of outlet while holding
the cord.
For the normal operation of the machine, please keep the ambient temperature is 10 ~ 35℃,
humidity is 30% ~ 75% and atmospheric pressure is 800 ~ 1060hpa.
For the Transportation of the machine, please keep the ambient temperature is -25 ~ 70℃,
humidity is 10% ~ 95% and atmospheric pressure is 500 ~ 1060hpa.
For the Storage of the machine, please keep the ambient temperature is -10~ 55℃, humidity
is 30% ~ 75% and atmospheric pressure is 700 ~ 1060hpa.
Avoid environments where the equipment is exposed to excessive shocks or vibrations

----------------------------------------------------------------------------------------------- Auto Ref/Keratometer CRK-8800 7
2-4 Safety Precaution
This equipment has been developed and tested in conformity with domestic & international
safety standards and regulations, which guarantees the high stability of this product. This
guarantees a very high degree of safety for this device. The legislator expects us to inform
the user expressively about the safety aspects in dealing with the device. The correct
handling of this equipment is imperative for its safe operation. Therefore, please read
carefully all instructions before switching on this device. For more detailed information,
please contact our Customer Service Department or one of our authorized representatives.
1. This equipment must not be used (a) in an area that is in danger of explosions and (b)
in the presence of flammable, explosive, or volatile solvent such as alcohol, benzene
or similar chemicals.
2. The device should neither be kept nor installed in the place with high humidity. For the
optimal operation, the humidity should be at the range of 30%~75%. The machine
should not be exposed to the place where water splashes, drips or sprays. Do not
place containers containing fluids, liquids, or gases on top of any electrical equipment
or devices
3. The equipment must be operated only by, or under direct supervision of properly
trained and qualified person/s.
4. Modifications of this equipment may only be carried out by SHANGHAI HUVITZ’s
service technicians or other authorized persons.
5. Customer maintenance of this equipment may only be performed as stated in the
User’s Manual and Service Manual. Any additional maintenance may only be
performed by SHANGHAI HUVITZ’s service technicians or other authorized persons.
6. The manufacturer is only responsible for effects on safety, reliability, and performance
of this equipment when the following requirements are fulfilled: (1) The electrical
installation in the respective room corresponds to the specifications stated in this
manual and (2) This equipment is used, operated and maintained according to this
manual and Service Manual.
7. The manufacturer is not liable for damage caused by unauthorized tampering with the
device(s). Such tampering will forfeit any rights to claim under warranty.

----------------------------------------------------------------------------------------------- Auto Ref/Keratometer CRK-8800 8
8. The equipment may only be used together with accessories supplied by SHANGHAI
HUVITZ’s. If the customer makes use of other accessories, use them only if there are
usability under technical safety aspects has been proved and confirmed by SHANGHAI
HUVITZ or the manufacturer of the accessory.
9. Only persons who have undergone proper training and instructions are authorized to
install, use, operate, and maintain this equipment.
10. User’s manual or service manual should be kept in the place where the persons in
chare of operation and maintenance can access easily any time.
11. Do not force cable connections. If a cable does not connect easily, be sure that the
connector (plug) is appropriate for the receptacle (socket). If you cause any damage to
a cable connector(s) or receptacle(s), let the damage(s) be repaired by an authorized
service technician.
12. Please do not pull on any cable. Always hold on to the plug when disconnecting cables.
13. This equipment may be used for the international application related to Refractometry
and Keratometry according to this manual.
14. Before every operation, proceed with visual inspection on the equipment exterior to
seek any mechanical damage(s) to ensure the proper functioning.
15. Do not obstruct any ventilation outlet for proper heat dissipation.
16. In case of any presence of smoke, spark or abnormal noise/smell from the machine,
please power off immediately and pull out the plug.

----------------------------------------------------------------------------------------------- Auto Ref/Keratometer CRK-8800 9
3. Product Outline
3-1 Main parts
1. Height Adjustment Mark: Adjusts the eyes’ height of examinees
2. Operation Buttons: Selecting of functions
ٍ3. Operation Lamp : Indicates whether or not the electric power is on
4. Display Monitor: Monitor for measurement
5. Measurement Button: Performing the measurement by pressing it after focusing.
6. Operation Lever: Adjusting the focus by moving to the directions of forward/backward,
left/right, up and down.
7. Stage Fixing Lever: Fixing the stage
8. Printer button: A button for printing of measuring results
9. Printer: Printing the measured results
.

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1. Forehead Rest: Preventing the vibration by fixing the forehead
2. Measuring Object Lens: Measuring the image imaging on the retina of eyes.
3. Chin Rest: Preventing the vibration by fixing the chin
4. Power Switch: Switch for power on/off
5. Chin-rest Adjusting Lever: Adjusting the up and down position of Chin-rest.

----------------------------------------------------------------------------------------------- Auto Ref/Keratometer CRK-8800 11
1. Power Supply Socket: A socket connecting to exterior power plug
2. Serial Interface Connector: A terminal connecting to the exterior equipment
3. Clamping Bolt: Fixing the system stage
NOTE
As connecting to exterior monitor, noises can appear on the monitor owing to the
length or kind of cable, and the quality of monitor.

----------------------------------------------------------------------------------------------- Auto Ref/Keratometer CRK-8800 12
3-2 Optical System

----------------------------------------------------------------------------------------------- Auto Ref/Keratometer CRK-8800 13
3-2-1.List of Optical Components
(1) : patient’s eye
(2-1, -2) : LED for lightening cornea
(3-1, -2, -3) : ring unit of the keratometry
(4-1) : protective glass
(4-2):halfmirror
(4-3):halfmirror
(4-4):reflectionmirror
(5) : polarizing beam splitter
(6) : reflection mirror
(7) : polarizing filter
(8) : collimation lens
(9) : diffuser
(10) : light source(R)
(11) : objective lens
(12) : insert lens
(13) : polarizing filter
(14) : image lens
(15) : MLA (micro lens array)
(16) : TV camera(R)
(17) : image lens for Keratometry
(18) : TV camera (K)
(19) : moving lens used to modify the eyesight
(20) : Fixation chart
(21) : illumination LED
R = Refractometer
K = Keratometer

----------------------------------------------------------------------------------------------- Auto Ref/Keratometer CRK-8800 14
3-2-2.Light Paths of the System
Ａ: External illumination
(2-1, 2-2 Î1)
Ｂ: Corneal observation system
(1Î(4-1Î4-2Î4-3Î17Î18)
Ｃ: Ker measurement system
(3-1, 3-2, 3-3Î1Î4-1Î4-2Î4-3Î17Î18)
Ｄ: Projection system of the REF light source
(10Î9Î8Î7Î6Î5Î4-2Î4-1Î1)
Ｅ: Projection system of the REF measurement
(1Î4-1Î4-2Î5Î11Î13Î14Î15Î16)
Ｆ: Illum inat ion system of the light source for Retro-Illume observation
(10Î9Î8Î7Î6Î5Î4-2Î4-1Î1)
Ｇ: Image capturing system of Retro-Illume observation
(1Î4-1Î4-2Î4-3Î17Î18)
Ｈ: Projection system of the target chart
(21Î20Î19Î4-4Î4-3Î4-2Î4-1Î1)

----------------------------------------------------------------------------------------------- Auto Ref/Keratometer CRK-8800 15
3-3 Electrical System
3-3-1.Electrical construction diagram
3-3-1-1.System functional block diagram
CN12
CN13 CN21
CN22 CN1
CN7 CN6 CN8 CN5 CN4
CN10
CN23
CN18 CN17
CN20
CN12CN12CN14
JP1
JP9
CN7 JP3 JP2 JP10
JP8 JP5 JP4
CON3
CON12
CON10CON8 CON17
CON1 CON13 CON18
CON2 CON14 CON16
CON15 CON11
CON7
CON4
CON5
CON6 CON9
AC 100-
240~ Dual
Line
Fuse
Power
switch
(DPST) SMPS
DC Output
+5V, 4A +5V, 2A
+12V, 1.8A
THERMAL
PRINTER
FRONT
SWITCH
LCD
INVERTER
ENCODER1
ENCODER2
COM1 COM2
RL_PI
JOYSTIC
VGA OUT
CMOS
CAMERA
LCD
CCD
CAMERA
CN3
MIRE_RINGLED_RDY
REF_MOTOR
REF_PI
REF_LED
DC_MOTOR
DIOPTER
MOTOR
DIOPTER
PI
AIMING_VR
MAIN BOARD
BASE INTERFACE BOARD
MOTOR BOARD
+5V, 4A +5V, 2A
+12V, 1.8A
+5V, 2A
+12V, 1.8A
+5V, +12V
+5V, +12V, +3.3V
+5V, +12V, +3.3V
CN9
PERIPHERAL
+5V
+5V, +12V+12V
+5V
+12V
+3.3V
+5V, +12V +5V, +12V +5V, +3.3V
+3.3V +5V, +12V
+5V
+5V +5V
+12V
+5V

----------------------------------------------------------------------------------------------- Auto Ref/Keratometer CRK-8800 16
3-3-1-2.Power input electrical block diagram
AC 100-240~ Power switch
(DPST) SMPS
DC Output
+5V, 4A
+5V, 2A
+12V, 1.8A
Dual Line Fuse
3-3-2.Electrical wiring
3-3-2-1.Main Board
CN9
CN23
CN18
CN17
MAIN BOARD
+5V, +12V
+5V, +12V+12V
+5V
+12V
CN2 CN11 CN20
CN48
CN3CN4CN5
CN6 CN8
CN7
CN22 CN1
CN21
CN13
CN12

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3-3-2-2.Description of wire harness connection of main board
Connect
No. Description Target connector
CN2 Motor board interface connector Motor Board JP1
CN3 Mire ring LED connector Mire ring B/D CON1
CN4 External illumination LED
connector EXT ILM assy
CN5 Not used Not connect
CN8 Not used Not connect
CN9 Peripheral Peripheral. assy 51
CN12 Serial port (COM1) : Handshake Not connect
CN13 Serial port (COM2) Not connect
CN17 KER CMOS camera connector KER CMOS B/D J2
CN18 REF CCD camera connector REF CCD camera assy
CN20 LCD CONNECTOR LCD
CN21 Not used Not connect
CN22 Not used Not connect
CN28 RGB out RGB out port
CN48 Main power connector Base interface B/D CON 9
CON6 IO Board interface connector 1 BASE INTERFACE CON 4
CON7 IO Board interface connector 2 BASE INTERFACE CON 5

----------------------------------------------------------------------------------------------- Auto Ref/Keratometer CRK-8800 18
3-3-2-3.Base IO Interface Board
CON3
CON12
CON10 CON17
CON1 CON13
CON2 CON14 CON16
CON11
CON4
CON5
CON6
CON9
BASE INTERFACE BOARD
+5V, 4A
+5V, 2A
+12V, 1.8A
+5V, 2A
+12V, 1.8A
+5V
+12V
CON15
CON8
CON18
CON7

----------------------------------------------------------------------------------------------- Auto Ref/Keratometer CRK-8800 19
3-3-2-4.Description of wire harness connection of IO Board
Connect No. Description Target connector
CON 1 Serial port (COM1) : Handshake Ext. D-SUB connector
CON 2 Serial port (COM2) Ext. D-SUB connector
CON 3 Thermal printer connector Thermal Printer
CON 4 IO Board interface connector 1 Main B/D CN11, CN6
CON 5 IO Board interface connector 2 Main B/D CN12, CN7
CON 6 DC Power input connector SMPS
CON 7 RGB out port Ext. D_SUB connector
CON 9 DC Power output connector Main B/D CN48
CON 10 Key pad connector Front switch assy J2
CON 11 Printer Key connector Printer switch assy J1
CON 13 Encoder1 connector Encoder assy J1
CON 14 Right Left PI connector PI B/D J2PI assy J2
CON 15 Encoder2 connector Encoder assy J1
CON 16 Joystick connector Joystick harness
CON 17 LCD Back light Front switch J2