Huvitz CRK-1 User manual

Service Manual
Auto Ref/Keratometer CRK-1

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Precautions
This product may malfunction due to the electromagnetic wave that is generated fro
m mobile phone, two-way radio, machinery controlled wireless and others. Do not pla
ce any device that may affect this product nearby.
We believe that the contents of this user manual are accurate in overall since they
were reviewed carefully. However, Shanghai Huvitz does not assume any kind of res
ponsibility for the latent mistake or omission that results from the use of information i
ncluded in this user manual.
Shanghai Huvitz has the right to make any kind of modification to this product or pr
oduct specs anytime without prior notice and modification may not be renewed on thi
s document.

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Ver. 1.0(2019.07)
Shanghai Huvitz Co., Ltd.
Building 1, No. 150, Renjie Road, Fengxian, Shanghai, 201401, China.
All rights 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

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Contents
1. Important Notice............................................................................................................................................................................5
2. Safety Information.........................................................................................................................................................................6
2.1. Introduction............................................................................................................................................................................ 6
2.2. Safety Symbol.......................................................................................................................................................................7
2.3. Environmental Considerations.........................................................................................................................................10
2.4. Safety Precaution...............................................................................................................................................................12
3. Product Outline........................................................................................................................................................................... 14
3.1. Nomenclature...................................................................................................................................................................... 14
3.2. Optical System................................................................................................................................................................... 18
3.3. Electrical System................................................................................................................................................................22
3.4. Mode Setting.......................................................................................................................................................................30
3.5. Principles of Measurement..............................................................................................................................................31
4. Repair Standard...........................................................................................................................................................................35
4.1. Checking and Control.......................................................................................................................................................35
4.2. Auto Tracking Setup..........................................................................................................................................................53
4.3. Pupil distance calibration (PD Setup).......................................................................................................................... 56
4.4. Factory Data Setup...........................................................................................................................................................59
4.5. Color Test............................................................................................................................................................................ 60
4.6. Touch Setup........................................................................................................................................................................ 61
4.7. DPC (Dead Pixel Correction) Setup.............................................................................................................................63
4.8. IQC mode............................................................................................................................................................................65

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4.9. Software upgrade...............................................................................................................................................................66
5. Disassembly and Assembly Procedure.............................................................................................................................. 68
5.1. Removing the Cover.........................................................................................................................................................68
5.2. Disassembling the Moving Base Assy......................................................................................................................... 70
5.3. Disassembling the Front-Cover-Assy (LCD-Assy)......................................................................................................71
5.4. Disassembling the OPTICAL HEAD ASSY.................................................................................................................73
5.5. Disassembling the MAIN FRAME ASSY..................................................................................................................... 74
6. Troubleshooting........................................................................................................................................................................... 76
7. Technical Materials.....................................................................................................................................................................82

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1. 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
should not be used together in the same environmental as the medical eq
uipments
This equipment has been tested and found to comply with the limits for medical devices
in IEC 60601-1:2001. These limits are designed to provide reasonable protection against
harmful interference in a typical medical installation
Power Cord
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,min
imum 6A,Type SJT or SVT, 18/3AWG, 10A, max 3.0m long : One end terminates with bl
ade attachment plug (HAR) Type, NEMA 6-15P.
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 entir
ely accurate at the time of publication. Shanghai Huvitz assumes no responsibility, howev
er, for possible errors or omissions, or for any consequences resulting from the use of th
e information contained herein.
Shanghai Huvitz reserves the right to make changes in its products or product specificati
ons at any time and without prior notice, and is not required to update this documentatio
n to reflect such changes.
!
WARNING

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2. Safety Information
2.1. Introduction
Safety is everyone’s responsibility. The safe use of this equipment is largely dependent u
pon 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 instructio
ns contained in this manual are fully understood and followed to enhance safety to the p
atient and the user/operator. It is for this reason that the following safety notices have be
en placed appropriately within the text of this manual to highlight safety related informatio
n or information requiring special emphasis. All users, operators, and maintainers must be
familiar with and pay particular attention to all Warnings and Cautions incorporated herei
n.

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"Warning,” indicates the presence of a hazard that could result in severe person
al injury, death or substantial property damage if ignored.
NOTE
"Note,” describes information for the installation, operation, or maintenance of w
hich 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.
2.2. Safety Symbol
The International Electro technical Commission (IEC) has established a set of symbols
!
WARNING
!
CAUTION

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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
This symbol identifies a safety note. Ensure you understand the
function of this control before using it. Control function is descr
ibed in the appropriate User’s or Service Manual.
Manufacturer
(Fabricant)
It indicates the year of manufacture and the manufacturer.
Authorised Representative in the European Community
(Représentant autorisé dans la Communauté européenne)
It indicates the safe ground point connected to the chassis of e
quipment. It is required to do the protective ground to the cond
uctive section in the equipment of class I for the purpose of saf
ety.
Temperature Limitation
(Limitation de température)
Keep DRY
(Garder au sec)
Disposal of your old appliance
1. When this crossed-out wheeled bin symbol is attached to a pro
duct it means the product is covered by the European Directive 20
02/96/EC.
2.All electrical and electronic products should be disposed of separ
ately from the municipal waste stream via designated collection faci
lities appointed by the government or the local authorities.
3. The correct disposal of your old appliance will help prevent p
otential negative consequences for the environment and human hea

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lth.
4. For more detailed information about disposal of your old applian
ce, please contact your city office, waste disposal service or the sh
op where you purchased the product.
Alternating Current
Warning: Crushing or insert of hand
(Attention: écrasement ou insertion de la main)
CE Mark
(Marque CE)
CE for RoHS
RoHS Directive Compliance 2011/65/EU
(CE pour RoHS
Conformité à la directive RoHS 2011/65 / UE)
Atmospheric pressure limitation
(Limitation de pression atmosphérique)
Humidity limitation
(Limite d'humidité)
Stack direction
(Direction de la pile)
Fragile , handle with care
(Fragile, manipuler avec soin)
Keep away from sunlight
(Tenir à l'écart de la lumière du soleil)
Stack layer limitation
(Limiter la couche de pile)