Eiki EK-700LU User manual

Laser Projector
Service Manual
Model: EK-700LU~series

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Content
Content................................................................... 2
Safety instruction ................................................... 3
Safety Cautions................................................... 4
Safety precautions .............................................. 8
Circuit protection.................................................... 9
How to replace the fuse...................................... 9
Specification......................................................... 10
Specification ..................................................... 10
Indicator status ................................................. 11
Maintainance ........................................................ 14
Cleaning the Filter ............................................. 14
Cleaning the Lens ............................................. 16
Cleaning the Cabinet ........................................ 16
How to check the light source usage time........ 17
Safety function instruction ................................... 18
Standby mode instruction .................................... 19
Mechanical disassembly ...................................... 20
Adjustment ........................................................... 27
Service adjustment menu operation ................. 27
Adjustment after replacement parts ............... 28
Electric adjustment............................................... 29
Chassis block diagram......................................... 32
Block diagram................................................... 32
Fan control diagram.......................................... 33
Trouble shooting................................................... 34
Light indicator and projector status.................. 34
No power .......................................................... 37
Power on abnormal........................................... 38
Image display abnormal.................................... 39
No sound .......................................................... 40
Parts location diagram ......................................... 43
PCB diagram ........................................................ 47

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Safety instruction
The service manual is only for experienced technicians, rather than the general public.
The service manual does not include the warning about the non-technicians or to inform the danger they may
occur in the maintenance process.
When the product is powered on, it can only be repaired or processed by experienced professional
technicians. Any other person who attempts to repair or repair the products involved in the service manual
may result in serious injury or even death.
Caution
Technicians need to read and follow the "safety precautions" and "important safety tips" strictly in the service
manual in the maintenance process.
Lead-free solder (Pb Free)
The projector uses the PCB board of lead-free solder.
Please use the PCB board of lead-free solder to prevent the harm to the global environment.
Notes
●Lead-free solder: The Sn-Ag-Cu (tin - Silver - copper) is with a higher melting point (about 217℃) than the
standard solder. in general, the melting point will be 30℃to 40℃higher. And you should select the soldering
iron with temperature limit, and the temperature may reach 37℃± 10℃.
●Lead-free solder precations: The Sn-Ag-Cu lead-free solder (SN Ag Cu) will splash when it is heated to high
temperature (at about 600℃or higher).
●The PCB board about our product are all lead-free solder. When it is necessary to use leaded solder, please
make sure to remove the lead-free solder before, or ensure that the lead-free solder will be heated to
completely melt, and then coate with leaded solder.
●Please check whether there is excess solder material on the components' surface which may ow to the other
side after welding PCB board into a double layer.
Identification of PCB board for lead-free soldering materials
The logo just as shown in the figure below will be engraved or printed on the PCB board' surface or back when us-
ing the lead-free soldering materials.
b

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Safety instruction
Safety Cautions
Precautions
Please read this manual carefully before using your NEC projector and keep the manual handy for future reference.
!
Caution Ignoring messages indicated by this symbol may lead to personal injuries or deaths due to
human errors.
!
Note Ignoring messages indicated by this symbol may lead to personal injuries or property damage.
High voltage inside with risks of electric shock.
When turning on the projector, make sure no one is facing the lens within laser range.
Do not peep at the lens when the projector is activated to avoid serious injury to the eyes.
Never place goods in the projection window while working as it may overheat,burn or even catch
re.Press the Blank button through the remote controller for temporarily pause the projection.
DANGER
CLASS 4 LASER RADIATION WHEN OPEN THE PARTS WITH LEFT MARK.
AVOID EYE OR SKIN EXPOSURE TO DIRECT OR SCATTERED RADIATION.
DO NOT DISASSEMBLE the Engine Module which is located the danger label as shown below.

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Safety instruction
PROHIBIT
About the projector’s light source
– Do not look into the projector’s lens.
Strong light that could damage your eyes is projected when the projector is operating. Be especially careful
when children are around.
– Do not look at the projected light using optical devices (magnifying glasses, reectors, etc.). Doing so
could result in vision impairment.
– Check that there is no one looking at the lens within the projection range before turning on the projector.
– Do not allow children to operate the projector alone. When a child is operating the projector an adult
should always be present and watch the child carefully.
–The below pictogram, that is indicated near the lens on the cabinet, describes this projector is categorized
in the risk group 2 of IEC 62471-5:2015. As with any bright light source, do not stare into the beam, RG2
IEC 62471-5:2015.
High voltage inside with
risks of electric shock.
Operation and maintenance
tips about these components.
!
Note: DO NOT remove the casing (or back cover) as
this may result in electric shock. Users shall not execute
any maintenance work on components within your
projector. Call qualied maintenance personnel in case
of any maintenance requirements.
Caution
Danger of electric shock
DO NOT open this.
!
CAUTION
To turn o󰀨 main power, be sure to remove the plug from power outlet.
The power outlet socket should be installed as near to the equipment as possible, and should be easily ac-
cessible.
WARNING:
•TO PREVENT FIRE OR SHOCK, DO NOT EXPOSE THIS UNIT TO RAIN OR MOISTURE.
DO NOT USE THIS UNIT’S PLUG WITH AN EXTENSION CORD OR IN AN OUTLET UNLESS ALL THE
PRONGS CAN BE FULLY INSERTED.
Important Safeguards
These safety instructions are to ensure the long life of your projector and to prevent re and shock. Please read them
carefully and heed all warnings.
Installation
•Do not place the projector in the following conditions:
– on an unstable cart, stand, or table.
– near water, baths, or damp rooms.
– in direct sunlight, near heaters, or heat radiating appliances.
– in a dusty, smoky or steamy environment.
– on a sheet of paper or cloth, rugs or carpets.
• If you wish to have the projector installed on the ceiling:
– Do not attempt to install the projector yourself.

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– The projector must be installed by qualied technicians in order to ensure proper operation and reduce the risk of
bodily injury.
– In addition, the ceiling must be strong enough to support the projector and the installation must be in accordance
with any local building codes.
– Please consult your dealer for more information.
• Do not install and store the projector in the below circumstances. Failure to do so may cause of malfunction.
– In powerful magnetic elds
– In corrosive gas environment
– Outdoors
• If intense light like laser beams enters from the lens, it could lead to malfunction.
CAUTION
This equipment is designed to be used in the condition of the power cord connected to earth. If the
power cord is not connected to the earth, it may cause electric shock. Please make sure the power cord
is earth ed properly.
Do not use a 2-core plug converter adapter.
NOTE
Preventive measures:
– Please make sure to set the High land o󰀨 when using the projector at altitudes above 1700 meters, or it may
shorten the life of internal components or even cause functional failure.
– Please make sure to set the High land on when using the projector at altitudes above 1700 meters but below
3000 meters, or it may shorten the life of internal components or even cause functional failure.
– Never install the projector in a place higher than 3000 meters, or it may shorten the life of internal components
or even cause functional failure.
– Some more detailes about operation guidance, please refer to the projector setup menu.
– Please consult the dealer or authorized service center for preventive measures if you want to use the projector in high
altitude area.
Cable information
WARNING
• Operation of this equipment in a residential environment could cause radio interference.
• Do not cover the lens with the lens cap or equivalent while the projector is on. Doing so can lead to melting of the cap due to
the heat emitted from the light output.
• Do not place any objects, which are easily a󰀨ected by heat, in front of the projection lens. Doing so could lead to the object
melting from the heat that is emitted from the light output.
• Do not use a spray containing ammable gas to get rid of accumulated dust and dirt on the lter and the projection window. It
may cause of re.
Fire and Shock Precautions
• Ensure that there is su󰀩cient ventilation and that vents are unobstructed to prevent the build-up of heat inside your
projector. Allow at least 4 inches (10 cm) of space between your projector and a wall.
• Prevent foreign objects such as paper clips and bits of paper from falling into your projector. Do not attempt to retrieve
any objects that might fall into your projector. Do not insert any metal objects such as a wire or screwdriver into your
projector. If something should fall into your projector, disconnect it immediately and have the object removed by a
qualied service personnel.
• Do not place any objects on top of the projector.
• Do not touch the power plug during a thunderstorm. Doing so can cause electrical shock or re.
• The projector is designed to operate on a power supply of 100-240V AC 50/60 Hz. Ensure that your power supply ts
this requirement before attempting to use your projector.
• Keep any items such as magnifying glass out of the light path of the projector. The light being projected from the lens
is extensive, therefore any kind of abnormal objects that can redirect light coming out of the lens, can cause unpredict-
able outcome such as re or injury to the eyes.
• Do not place any objects, which are easily a󰀨ected by heat, in front of a projector exhaust vent.
Doing so could lead to the object melting or getting your hands burned from the heat that is emitted from the exhaust.
Safety instruction

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• Do not splash water over the projector. Doing so can cause electrical shock or re. If the projector gets wet, turn o󰀨 the
projector, unplug the power cord and have the projector serviced by a qualied service personnel.
• Handle the power cord carefully. A damaged or frayed power cord can cause electric shock or re.
– Do not use any power cord other than the one supplied with the projector.
– Do not bend or tug the power cord excessively.
– Do not place the power cord under the projector, or any heavy object.
– Do not cover the power cord with other soft materials such as rugs.
– Do not heat the power cord.
– Do not handle the power plug with wet hands.
• Turn o󰀨 the projector, unplug the power cord and have the projector serviced by a qualied service personnel under the
following conditions:
- When the power cord or plug is damaged or frayed.
- If liquid has been spilled into the projector, or if it has been exposed to rain or water.
– If the projector does not operate normally when you follow the instructions described in this user’s manual.
– If the projector has been dropped or the cabinet has been damaged.
– If the projector exhibits a distinct change in performance, indicating a need for service.
• Disconnect the power cord and any other cables before carrying the projector.
• Turn o󰀨 the projector and unplug the power cord before cleaning the cabinet.
• Turn o󰀨 the projector and unplug the power cord if the projector is not to be used for an extended period of time.
• When using a LAN cable:
For safety, do not connect to the terminal for peripheral device wiring that might have excessive voltage.
• Lens shift, focus and zoom operations.
– When shifting the lens or adjusting the focus or zoom, do so from either behind or to the side of the projector.If these
operations are performed from the front, your eyes could be exposed to strong light and get injured..
– Keep your hands away from the lens area when performing the lens shift operation. If not, your ngers could get
caught in the cap between the cabinet and the lens.
Safety instruction

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1.1 General policy:
– DO NOT attempt to make a circuit modication for the sake of safety for long.
– Unplug the power cord from the power outlet before removing the projector.
– Please use the random supply line correctly, and make sure that the line must be earthed.
– Use insulation transformer on the ac power cord before maintenance.
– DO NOT touch any rotating parts of the projector (cooling fan, etc.) when the lid is removed and the power is
powered on.
– Please pay attention to the original layout of the wire in the maintenance process. Once there is a short circuit,
please replace all the pin the maintenance processarts that are overheated and damaged due to short circuit.
– Make sure to install the protective devices, such as: insulation barrier, insulation paper, screen and insulation R-C
connection, etc. after the maintenance is completed.
– Please check for the leakage after the maintenance is completed to prevent customers from electric shock.
1.2 Leakage check:
1. Be ready to measure circuit in gure 1 below.
Make sure your voltmeter are of the same properties as described in table 1.
2. Connect the circuit as gure 2 shows. Plug the power cord into an electrical outlet.
3. Connect M1 to T1 as gure 2 shows, and measure the voltage.
4. Connect M1 to T2, and measure the voltage again.
5. The read value of the voltmeter in step 4 must be 0.375 volts or less in step 3 and 4. This means that the current
must be 0.75 mA or less.
6. If the read values exceed the above criteria, the projector must be repaired and re-examination in order to
prevent the risk of electric shock before returning to the customer.
Safety precautions
Safety instruction

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The projector has the following security operation circuit protection functions. If there is any abnormal in the inside of
the projector, one of the following protection circuit action will make your projector shut down automatically .
Fuse
(F001)
How to replace the fuse
1. The fuse is placed above the lter board. Remove the case,
the main board , AV board and speaker bracket as the steps
in "Mechanical Disassembly" .
2. Remove the fuse from the fuse holder ,then replace it with
the specied type.
Circuit protection
POWER BOARD PART NUMBER: 63670070
Fuse (F0001)
The fuse is placed inside the projector and on the Power Board.
When you find the Standby (red) indicator light is off, it is highly
possible that the fuse is disconnected. Please check the power
board as follows and use the following power to replcae.

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Specification
Specification
Mechanical properties
Dimensions (W×H×D ): 405x137x358mm
Net Weight ~7.9Kg
Adjustable foot 3.5˚
LCD resolution
LCD system 0.64"x3（EK-700LUL/EK-700LU) TFT, active matrix
LCD resolution EK-700LUL/EK-700LU (1920 x 1200)
Compatible signals
Color standard PAL, SECAM, NTSC, NTSC4.43, PAL-M and PAL-N,PAL-60
HDTV signal 480i, 480p, 576i, 576p, 720p, 1035i and 1080i
Scanning frequency Horizontal frequency: 15 kHz–100 KHz; Vertical frequency: 24–85 Hz
Optical elements
Image size (diagonal lines) 30"-300", adjustable
Projection distance ( mm ) EK-700LUL/EK-700LU: Wide 0.765-7.964 Tele:1.258-12.885
Lens (Standard Lens) EK-700LUL/EK-700LU: 1.2(wide)-2.0(tele)
Light source power EK-700LUL/EK-700LU: 105W
Terminal
VGA IN Mini D-sub 15pin x1
VGA OUT Mini D-sub 15pin x1
HDMI1 terminal HDMI A type 19 pin
HDMI2 terminal HDMI A type 19 pin
LAN 100 Base-TX (100Mbps)/10 Base-T (10Mbps), RJ45
USB-B USB connector (B type x1)
USB-A USB connector (A type x1)
RS-232 terminal D-sub 9 pin x1
AUDIO IN MINI 3.5MM STEREO X1
AUDIO OUT MINI 3.5MM STEREO X1
Power
Voltage and power consumption AC 100–240 V (Max 4.5A), 50/60 Hz
Projection power EK-700LUL/EK-700LU: 350W(Normal), 240W(ECO.1),220W(ECO.2)
Fuse 20A/250V
Internal speaker 16W RMS 8ohm, *1
Operating Environment
Operating temperature 0℃~40℃(35~ ECO)
Operating humidity 20%~85%
Storage Temperature -10℃~50℃
Storage humidity 10%-85%
High land 3000 m
Remote control
Battery AA ALKALINE TYPE x 2(not ncluding batteries)
Operating Range ±15° about 6 m or about 8 m straight
Dimensions 110mm(L)X50mm(W)X20mm(H)
Net Weight 38g
Accessories
Quick Start Guide
Remote control and batteries
AC power cord (US Type x 1 / Euro Type x 1)
VGA cable