Eiki LC-XT4U User manual

REFERENCE NO. SM5110785-00
PRODUCT CODE :
LC-XT4U KF6B 1 122 342 01 U.S.A., Canada
LC-XT4E LF6B 1 122 343 01 Europe
(Projection lens is optional.)
Multimedia Projector
SERVICE MANUAL
ORIGINAL VERSION
Chassis No. KF6-XT4U00
LF6-XT4E00
MODEL NO. LC-XT4U U.S.A., Canada
LC-XT4E Europe
Give complete “Chassis No.” for parts
order or servicing, it is shown on the
rating sheet on the cabinet on the pro-
jector.
FOREWORD
For your convenience, all service parts, identified in this manual are available through Eiki’s normal distribution
channels.
In addition to service part number, the generic descriptions have been given, where possible, to allow your serv-
ice technicians to substitute equivalent components which might be available from other sources.
All orders for service parts will be honored. However, in instances where generic components are considered to
be available from several common sources, as would be the case with an industry standard fuse, resistor, or
semiconductor, it may be more economical and expeditious to purchase the part locally.

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■Contents
■Contents ..................................................................................................................2
■Safety Instructions...................................................................................................3
■Specifications ..........................................................................................................4
■Circuit Protections ...................................................................................................5
■Lamp Replacement .................................................................................................9
■Maintenance and Cleaning....................................................................................13
■Mechanical Disassemblies ....................................................................................15
■Optical Unit Disassemblies....................................................................................39
■Optical Parts Location and Direction .....................................................................50
■Troubleshooting.....................................................................................................53
●No Picture ...................................................................................................53
●No Power ....................................................................................................58
●No Audio Output..........................................................................................62
●Temperature Abnormality............................................................................63
●Power Lens System Abnormality ................................................................64
●Lamp Abnormality .......................................................................................65
■Optical Adjustments .............................................................................................66
●Adjustments after Parts Replacement (Optical Parts).................................66
■Electrical Adjustments ...........................................................................................77
●Adjustments after Parts Replacement (Electrical Parts) .............................77
●Service Adjustment Menu Operation ..........................................................78
●Circuit Adjustments .....................................................................................79
●Service Mode Adjustment Menu .................................................................84
●Service Adjustment Data Table...................................................................86
■Waveforms ............................................................................................................94
■Control Port Functions...........................................................................................95
■IC Block Diagrams...............................................................................................101
■Mechanical and Optical Parts list ........................................................................109
■Electrical Parts List..............................................................................................121
Drawings & Diagrams ............................................................................ A1-A25
■Parts description and reading in schematic diagram .......................................... A2
■Block Diagrams ....................................................................................................A3
■Schematic Diagrams ....................................................................................A4-A14
■Printed Wiring Board Diagrams.................................................................. A15-A24
■Pins description of ICs, transistors, diodes ........................................................ A25

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WARNING:
The chassis of this projector is isolated (COLD) from AC line by using the converter transformer. Primary side of
the converter and lamp power supply unit circuit is connected to the AC line and it is hot, which hot circuit is
identified with the line ( ) in the schematic diagram. For continued product safety and protection of person-
nel injury, servicing should be made with qualified personnel.
The following precautions must be observed.
SAFETY PRECAUTIONS
1: An isolation transformer should be connected in the
power line between the projector and the AC line
before any service is performed on the projector.
2: Comply with all caution and safety-related notes
provided on the cabinet back, cabinet bottom, inside
the cabinet or on the chassis.
3: When replacing a chassis in the cabinet, always
be certain that all the protective devices are
installed properly, such as, control knobs, adjust-
ment covers or shields, barriers, etc.
DO NOT OPERATE THIS PROJECTOR WITHOUT
THE PROTECTIVE SHIELD IN POSITION AND
PROPERLY SECURED.
4: Before replacing the cabinet cover, thoroughly
inspect the inside of the cabinet to see that no
stray parts or tools have been left inside.
Before returning any projector to the customer, the
service personnel must be sure it is completely safe
to operate without danger of electric shock.
SERVICE PERSONNEL WARNING
Eye damage may result from directly viewing the light produced by the Lamp used in this equipment. Always
turn off Lamp before opening cover. The Ultraviolet radiation eye protection required during this servicing.
Never turn the power on without the lamp to avoid electric-shock or damage of the devices since the stabilizer
generates high voltages(approx.8kV) at its starts.
Since the lamp is very high temperature during units operation replacement of the lamp should be done at least
45 minutes after the power has been turned off, to allow the lamp cool-off.
PRODUCT SAFETY NOTICE
Product safety should be considered when a component replacement is made in any area of the projector.
Components indicated by mark in the parts list and the schematic diagram designate components in which
safety can be of special significance. It is, therefore, particularly recommended that the replacement of there
parts must be made by exactly the same parts.
■Safety Instructions
CAUTION
RISK OF EXPLOSION IF BATTERY IS REPLACED BY AN INCORRECT TYPE.
DISPOSE OF USED BATTERIES ACCORDING TO THE INSTRUCTIONS.
CAUTION
Not for use in a computer room as defined in the Standard for the Protection of Electronic Computer/Data
Processing Equipment, ANSI/NFPA 75.
Ne puet être utillisé dans une salle d’ordinateurs telle que définie dans la norme ANSI/NFPA 75 Standard for
Protection of Electronic Computer/Data Processing Equipment

Owner’s Manual (CD-ROM)
Quick setup manual
AC Power Cord
Wireless/Wired Remote Control Transmitter and Batteries
Remote Control Cable
VGA Cable
6 Types Light-Block Sheet (For option lens)
2 Types Lens Attachment (For option lens)
Real Color Manager Pro
Accessories
1.8" TFT Active Matrix type, 3 panels
Multi-media Projector
80.3 lbs (36.5 kg)
22.9" x 10" x 30.9" (581 mm x 252 mm x 783 mm)
1024 x 768 dots
2,359,296 (1024 x 768 x 3 panels)
PAL, SECAM, NTSC, NTSC4.43, PAL-M and PAL-N
Up, Down, Left and Right
800 TV lines
41 ˚F ~ 95 ˚F (5 ˚C ~ 35 ˚C)
14 ˚F ~ 140 ˚F (-10 ˚C ~ 60 ˚C)
Projector Type
Net Weight
Dimensions (W x H x D)
Panel Resolution
Number of Pixels
Color System
Scanning Frequency
Horizontal Resolution
Operating Temperature
Storage Temperature
LCD Panel System
300 watt type x 4
Projection Lamp
0˚ to 5.7˚
Feet Adjustment
Power Source : AA or R06 Type x 2
Operating Range : 16.4’ (5m) / ±30˚
Dimensions : 1.97” x 1.06” x 6.61” (50mm x 27mm x 168mm)
Net Weight : 4.4 oz (126 g) (including batteries)
Remote Control Transmitter
480i, 480p, 575i, 575p, 720p, 1035i, 1080i-50 and 1080i-60
High Definition TV Signal
AC 120 V (16 A Max. Ampere), 50 / 60 Hz (The U.S.A and Canada)
AC 200 ~ 240 V (9.0 A Max. Ampere), 50 / 60 Hz
(Continental Europe)
Voltage and
Power Consumption
H-sync. 15 ~ 120 KHz, V-sync. 50 ~ 120 Hz
Motorized Lens Shift
DVI-I Terminal (Digital/Analog), RCA Type (Audio R and L)
and DIN 8-pin (Control port)
Input 1 Jacks
BNC Type x 5 (R/Pr, G/Y, B/Pb, H/HV and V), RCA Type (Audio R and L)
and DIN 8-pin (Control port)
Input 2 Jacks
BNC Type x 2 (VIDEO/Y, C), RCA Type (Audio R and L)
and DIN 4-pin (S-Video)
Input 3 Jacks
Serial port in (DB 9), Serial port out (DB 9), USB port,
Audio out (RCA Type R and L) and Wired Remote Jack
Other Jacks
HDB 15-pin Terminal (Analog), RCA Type (Audio R and L)
and DIN 8-pin (Control port)
Input 4 Jacks
●The specifications are subject to change without notice.
●LCD panels are manufactured to the highest possible standards. Even though 99.99% of the pixels are effective, a tiny
fraction of the pixels (0.01% or less) may be ineffective by the characteristics of the LCD panels.
This symbol on the nameplate means the product is Listed by Underwriters Laboratories
Inc. It is designed and manufactured to meet rigid U.L. safety standards against risk of
fire, casualty and electrical hazards.
The CE Mark is a Directive conformity mark of
the European Community (EC).
- 4 -
■Specifications

This projector provides the following circuit protections to operate in safety. If the abnormality occurs inside the pro-
jector, it will automatically turn off by operating one of the following protection circuits.
A fuse(F901) is located inside of the projector. When the
POWER indicator is not lighting, the fuse may be opened.
Check the fuse as following steps.
The fuse should be used with the following type;
●Fuse
How to replace the fuse
1. Remove the cabinet top following to "Mechanical
Disassemblies".
2. Remove the cover and the fuse from fuse holder.
To install the fuse, take reversed step in the above.
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■Circuit Protections
Fuse Part No.: 423 028 4209
TYPE 15.0A400V FUSE
SOC CORP. SHV14 15A N4
Fuse Part No.: 423 033 1804
TYPE 30.0A250V FUSE
SOC CORP. KST2 30A
PLC-XT4E
PLC-XT4U
Fuse (F901)
Fuse (F901)
Cover
Cover
Fuse
Fuse
Holder
Holder
● AC Current Sensor
AC current sensor is used only for LC-XT4E.
The AC Current Sensor is provided to prevent damage to the power supply circuits.
When AC input voltage is under 108V at MAINS SW ON, the AC Current Sensor will be operated and the CPU
does not turn the projector on, and both of READY and WARNING TEMP. indicators start flashing.
Check that the AC current sensor signal is correct. L : Abnormality
Hot circuit
AC-INPUT
MAINS SW NOISE FILTER CURRENT SENSOR
FUSE
SW901 LF901
F901
A903
ASS'Y POWER
K96W

- 6 -
Circuit Protections
Lamp Cover switch
SW902
When the lamp cover is removed or no close com-
pletely, the lamp cover switch (SW902) cuts off
12V_PFC line to the PFC unit, and then a projector
will be shut down.
After opening the lamp cover for replacing the lamp
unit, place the lamp cover correctly, otherwise the pro-
jector can not be turned on.
Lamp Cover
●Lamp cover switch
●Power Failure Protection
Power failure protection diodes detect abnormal voltage on the power supply circuits or the fan operation stop.
When both of the WARNING TEMP. and READY Indicators are flashing:
When the projector detects an internal problem, it will shut down
automatically and both of the WARNING TEMP. and READY Indicators starts
flashing. In this condition, the projector cannot be turned on even if you press
the POWER ON-OFF button on the remote control unit or on the side control.
If this case happened, disconnect and reconnect the AC power cord, and
then turn on the projector again to check its operation. If the projector shuts
down again or fails to be turned on, the internal check and repair will be
required.
Check items listed below;
●Power Failure Protection
●AC Current Sensor (See the previous page.)
●Temperature Check of Lamps
●Lamp Cover Switch
READY
LAMP
LAMP
REPLACE
WARNING
TEMP.
FRONT INDICATORS
WARNING TEMP.
Indicator
READY
Indicator
WAR NING
TEMP.
READY
LAMP
REPLACE
LAMP
REAR INDICATORS
Temperature switches (SW 903~906)
are arranged near the four lamps.
Temperature switches will operate, if
temperature reaches 110 degrees.
Temperature switches
--- open at 110 degrees.
SW903 ---Lamp1
SW904 ---Lamp2
SW905 ---Lamp3
SW906 ---Lamp4
When temperature switches become
open, they cut off 12V_PFC line to
PFC(power factor control) unit, and
then a projector will be shut down.
●Temperature Check of Lamps
Temperature switch
SW906 (For Lamp4)
Temperature switch
SW905 (For Lamp3)
Temperature switch
SW903 (For Lamp1)
Temperature switch
SW904 (For Lamp2)

- 7 -
Circuit Protections
READY
LAMP
LAMP
REPLACE
WARNING
TEMP.
When the WARNING TEMP. Indicator is flashing:
The WARNING TEMP. Indicator flashes red to let you know the internal
temperature of the projector exceeds the normal level. If the temperature goes
up further, the projector will be turned off automatically and the Ready indicator
will go out. (The WARNING TEMP. Indicator continues flashing.) After the
cooling-off period, the READY Indicator lights on again and the projector can be
turned on by pressing the POWER ON-OFF button on the remote control unit or
on the side control. When you turn on the projector, the WARNING TEMP.
Indicator will go out.
If the WARNING TEMP. Indicator is still flashing, check items listed below;
●Installation
●Air Filter
●Temperature Monitor System
FRONT INDICATORS
WARNING TEMP.
Indicator
WARNING
TEMP.
READY
LAMP
REPLACE
LAMP
REAR INDICATORS
AIR FILTER
This projector is equipped with cooling fans for protection
from overheating. Pay attention to following to ensure prop-
er ventilation and avoid a possible risk of fire and malfunc-
tion.
- Do not cover vent slots.
- Keep bottom clear any objects. Obstructions may block cooling air.
AIR INTAKE VENTS
EXHAUST VENTS
HOT AIR EXHAUSTED !
Air blown from exhaust vent is hot. When using
or installing a projector, following precautions
should be taken.
●Do not put flammable objects near these vents.
●Keep rear grills at least 3’ (1m) away from any object,
especially heat-sensitive object.
●Do not touch this area, especially screws and metallic
parts. This area will become hot while a projector is used. HOT
● Installation
● Air Filter
- Air filter is clogged with dust particles. Remove dust from the air filter by following instruction in the "Air filter care
and cleaning".
- Ventilation slots of the projector are blocked. In such case, reposition the projector so that ventilation slots are not
obstructed.
- Check if projector is used at higher temperature place(Normal operate is 5 to 35°C or 41 to 95°F)

- 8 -
Circuit Protections
■To control the driving power of the cooling fans.
This projector detects internal temperature and automatically controls operating power of cooling fans.
The CPU checks the temperature and atmospheric pressure inside a projector. It checks a temperature using
temperature sensor-IC5801and it checks an atmospheric pressure using pressure sensor-IC886.
The CPU controls the driving power of the cooling fans so the temperature inside the projector is maintained to
normal temperature.
■To shut down the projector.
The CPU checks temperature of Blue polarized glass (PTH901) and inhalation air(IC5801). If each part temper-
ature reaches to abnormal temperature, the CPU will turn off a projector, and will blink WARNING TEMP. indi-
cator at intervals of 0.5 seconds. Cooling fans operate until temperature returns to normal. WARNING TEMP.
indicator will stop blink, if temperature returns to normal.
● Temperature Monitor System
Main Board
A-side
Front side
B-side
Temp. Sensor
IC2541
Temp. Sensor
(Inhalation air)
IC5801
Pressure Sensor
IC886
Temp. Sensor
(Blue polarized glass)
PTH901
Temperature sensors location
Blue polarizer unit

- 9 -
■Lamp Replacement
This Projector is equipped with 4 Projection Lamps to ensure brighter image and those lamps are controlled by Lamp
Management Function. Lamp Management Function detects status of all lamps and shows status on screen or on LAMP
REPLACE indicator. This function also automatically controls Lamp Mode when any of lamps is out for end of life or
malfunctions.
Projection Lamp lights normally.
Lamp Replace Indicator
This LAMP REPLACE indicator lights yellow when any of Projection Lamps is nearing its end, and flashes when any of them
becomes out. Check number of lamp on Lamp Status Display and replace lamp.
Yellow Lamp
Dim Lamp
X Mark on Lamp
Red Lamp
LAMP REPLACE
INDICATOR
Projection Lamp is turned off.
Projection Lamp is nearing its end. When image becomes
darker or color becomes unnatural, replace lamp. (LAMP
REPLACE indicator lights yellow.)
(LAMP REPLACE indicator flashes yellow.)
Projection lamp is defective or fails to be turned on. Restart
a projector on, and make sure lamp is on. If this mark still
appears, replace lamp corresponding with number marked
X.
LAMP STATUS
DISPLAY
1
4
3
2
Lamp Mode Changeover
Lamp Management Function automatically changes combination of lighting lamp (Lamp Mode) by detecting status of lamp.
When any of 4 lamps becomes out, Lamp Mode is changed over from 4 lamps to 2 lamps. And when any of 2 lamps are out,
a projector operates with 1 lamp. But, in case of combination that the Lamp of 1-4, or 2-3 does not light up, it becomes a 2
lamps mode.
Lamp Mode can be switched to 4 lamps or 2 lamps manually. Refer to SETTING section of Owner's manual.
1
2 4
3
1
4
3
2
4 LAMP MODE 2 LAMP MODE
(Example)
1
4
3
2
2 LAMP MODE
(Example)
13
24
1 LAMP MODE
(Example)
Lamp Status Display
Lamp Status Display appears on screen when power switch is on or changed input position (input 1, input 2, Input 3 or input 4).
This shows status of each lamp as; ON, OFF, NEAR END, or OUT. Refer to following for each status.
20
LAMP STATUS
INPUT 1
1
2 4
3
LAMP MANAGEMENT (before replacement)

- 10 -
LAMP REPLACEMENT
Check number of lamp to be replaced on Lamp Status
Display.
Remove two screws on Lamp Cover and press button to
open Lamp Cover. (See right figure.)
1
3
Loosen two screws and pull out Lamp Assembly to be
replaced by grasping handle.
4
Turn off a projector and disconnect AC Power Cord.
Allow a projector to cool down for at least 45 minutes.
2
Replace Lamp Assembly with a new one and tighten two
screws. Make sure Lamp is set properly.
6
Follow these steps to replace lamp assembly.
Replace Lamp Cover and tighten two screws.
5
7
8
Connect AC Power Cord to a projector and turn a
projector on.
Reset Lamp Replacement Counter. (Refer to section
"Lamp Replace Counter".)
NOTE : Do not reset LAMP REPLACEMENT COUNTER when
lamp is not replaced.
BUTTON
SCREWS
SCREWS
LAMP1
LAMP2
LAMP
COVER
Make sure which number of lamp needs to
be replaced on Lamp Status Display.
Figure shows case of replacing LAMP 2.
CAUTION : Do not operate a Projector while any of lamps removed.
It may result in malfunctions, fire hazard, or other accidents.
NOTES ON LAMP REPLACEMENT
To maintain quality of picture (better balance of color and brightness in entire screen), we recommend replac-
ing all 4 lamps at a time.
CAUTION : High pressure lamp may explode if improperly handled.
Refer to lamp replacement instructions.
When the life of the projection lamp of this projector
draws to an end, the LAMP REPLACE indicator
lights yellow. If this indicator lights yellow, replace
the lamp with a new one promptly.
The time when the LAMP REPLACE indicator lights
is depending on the lamp mode.
Lamp Replacement
LAMP3
LAMP4
WARNING :
TURN OFF THE UV LAMP BEFORE OPENING
THE LAMP COVER. USE UV RADIATION EYE
AND SKIN PROTECTION DURING SERVICING.
REAR INDICATORS
READY
LAMP
LAMP
REPLACE
WARNING
TEMP.
WARNING
TEMP.
READY
LAMP
REPLACE
LAMP
FRONT INDICATORS
LAMP REPLACE
INDICATOR

- 11 -
CAUTION
Do not drop a lamp assembly or touch a glass
bulb! Glass can shatter and may cause injury.
CAUTION
For continued safety, replace with a lamp
assembly of same type.
Allow a projector to cool for at least 45 minutes
before you open Lamp Cover. Inside of a
projector can become very hot.
CAUTION
HIGH VOLTAGE
HOT
ORDER REPLACEMENT LAMP
Replacement Lamp can be ordered through your dealer. When ordering a Projection Lamp, give the
following information to the dealer.
●Model No. of your projector : LC-XT4U / LC-XT4E
●Replacement Lamp Type No. : POA-LMP100
(Service Parts No. 610 327 4928)
Lamp Replacement
Move pointer to Lamp counter reset and
then press SELECT button. Move
arrow to replaced lamp number (Lamp
1, Lamp 2, Lamp 3 or Lamp 4) and then
press SELECT button.
Be sure to reset Lamp Counter when Lamp Assembly is replaced. When Lamp Replace Counter is reset, LAMP
REPLACE indicator stops lighting.
Turn projector on, press MENU button and ON-SCREEN
MENU will appear. Press POINT LEFT/RIGHT button(s) to
move a red frame pointer to SETTING Menu icon.
1
Press POINT DOWN button to move a red frame pointer to
“Lamp counter reset” and then press SELECT button.
2
Do not reset Lamp Replace Counter except after Projection lamp is
replaced.
Another confirmation dialog box appears and select [Yes] to
reset Lamp Replace Counter.
4
Move arrow to replaced lamp number (Lamp 1, Lamp 2, Lamp 3
or Lamp 4) and then press SELECT button. Message "Lamp
replace counter Reset?" is displayed. Move pointer to [Yes] and
then press SELECT button.
3
NOTE: Be sure to reset correct lamp number otherwise LAMP
REPLACE indicator continues lighting. Message "Lamp replace
counter Reset?" is
displayed. Move pointer
to [Yes] and then press
SELECT button.
1
2 4
3
Select [Yes] to
activate it.
LAMP REPLACE COUNTER
1
2 4
3

- 12 -
This projector uses a high-pressure lamp which must be handled carefully and properly. Improper handling
may result in accidents, injury, or create a fire hazard.
●Lamp lifetime may differ from lamp to lamp and according to the environment of use. There is no
guarantee of the same lifetime for each lamp. Some lamps may fail or terminate their lifetime in a shorter
period of time than other similar lamps.
●If the projector indicates that the lamp should be replaced, i.e., if the LAMP REPLACE INDICATOR lights
up, replace the lamp with a new one IMMEDIATELY after the projector has cooled down.
( Follow carefully the instructions in the LAMP REPLACEMENT section of owner's manual. ) Continuous
use of the lamp with the LAMP REPLACE INDICATOR lighted may increase the risk of lamp explosion.
●A Lamp may explode as a result of vibration, shock or degradation as a result of hours of use as its
lifetime draws to an end. Risk of explosion may differ according to the environment or conditions in which
the projector and lamp are being used.
IF A LAMP EXPLODES, THE FOLLOWING SAFETY PRECAUTIONS SHOULD BE TAKEN.
If a lamp explodes, disconnect the projector’s AC plug from the AC outlet immediately. Contact an
authorized service station for a checkup of the unit and replacement of the lamp. Additionally, check
carefully to ensure that there are no broken shards or pieces of glass around the projector or coming out
from the cooling air circulation holes. Any broken shards found should be cleaned up carefully. No one
should check the inside of the projector except those who are authorized trained technicians and who are
familiar with projector service. Inappropriate attempts to service the unit by anyone, especially those who
are not appropriately trained to do so, may result in an accident or injury caused by pieces of broken glass.
LAMP HANDLING PRECAUTIONS
The LAMP REPLACE indicator will light yellow when
the total lamp used time (corresponding value) reaches
2,500 hours - (✽). This is to indicate that lamp replace-
ment is required.
The total lamp used time is calculated by using the
below expression;
Total lamp used time = Teco + Tnormalx 1.25 - (✽)
Teco : used time in the Eco mode
Tnormal : used time in the Normal and Auto mode
You can check the lamp replacement counter following
to below procedure.
1Press and hold POWER ON-OFF button on the side
control of the projector or the remote control unit for
more than 20 seconds.
2 The projector used time and lamp used time will be
displayed on the screen briefly.
(✽) The specifications are subject to change without
notice.
Counter
Projector
Lamp
Normal
Eco
Corresponding
Value
150H
No.1 No.2 No.3 No.4
100H
50H
175H
100H
50H
175H
100H
50H
175H
100H
50H
175H
Total lamp used time
(Corresponding value)
● How to check Lamp Used Time
Projector used time
Lamp Replacement

After long periods of use, dust and other particles will accumulate on the LCD panel, prism, mirror, polarized glass,
lens, etc., causing the picture to darken or color to blur. If this occurs, clean the inside of optical unit.
Remove dust and other particles using air spray. If dirt cannot be removed by air spray, disassemble and clean the
optical unit.
● Cleaning with air spray
1. Remove the cabinet top following to "Mechanical Disassemblies".
2. Clean up the LCD panel and polarized glass by using the air spray from the cabinet top opening.
Caution:
Use a commercial (inert gas) air spray designed for cleaning camera and computer equipment. Use a resin-based noz-
zle only. Be vary careful not to damage optical parts with the nozzle tip. Never use any kind of cleanser on the unit. Also,
never use abrasive materials on the unit as this may cause irreparable damage.
● Disassembly Cleaning
Disassembly cleaning method should only be performed when the unit is considerable dirty and cannot be sufficiently
cleaned by air spraying alone.
Be sure to readjust the optical system after performing disassembly cleaning.
1. Remove the cabinet top and main units following to "Mechanical Disassemblies".
2. Remove the optical base top following to"Optical Unit Disassemblies". If the LCD panel needs cleaning, remove
the LCD panel unit following to "LCD panel/Prism ass'y replacement".
3. Clean the optical parts with a soft cloth. Clean extremely dirty areas using a cloth moistened with alcohol.
Caution:
The surface of the optical components consists of multiple dielectric layers with varying degrees of refraction.
Never use organic solvents (thinner, etc.) or any kind of cleanser on these components.
Since the LCD panel is equipped with an electronic circuit, never use any liquids (water, etc.) to clean the unit. Use of
liquid may cause the unit to malfunction.
- 13 -
■Maintenance and Cleaning
Unplug the AC power cord before cleaning.
Gently wipe the projection lens with a cleaning cloth that contains
a small amount of non-abrasive camera lens cleaner, or use a
lens cleaning paper or a commercially available air blower to
clean the lens. Avoid using an excessive amount of cleaner.
Abrasive cleaners, solvents, or other harsh chemicals might
scratch the surface of the lens.
Cleaning the Projection Lens
Cleaning the Projector Cabinet
Unplug the AC power cord before cleaning.
Gently wipe the projector body with a dry soft cloth. When the
cabinet is heavily soiled, apply a small amount of mild detergent
and finish with a dry soft cloth. Avoid using an excessive amount
of cleaner. Abrasive cleaners, solvents, or other harsh chemicals
might scratch the surface of the cabinet.

- 14 -
AIR FILTER CARE AND CLEANING
Air Filter prevents dust from accumulating on surface of Projection Lens and Projection Mirror. Should Air Filter
become clogged with dust particles, it will reduce Cooling Fans' effectiveness and may result in internal heat build up
and adversely affect life of a projector.
Clean Air Filter following steps below:
1Turn power off, and disconnect AC power cord from AC
outlet.
2Pull out air filter unit from the projector.
3Pulling up center frame of air filter top, separate air filter
top and sheet from air filter base.
4Clean each parts with brush, vacuum cleaner or wash
out dust and particles.
Be sure to dry them out.
5Assemble sheet, air filter top and air filter base, and
replace air filter unit to a projector.
CAUTION
- Do not operate a projector with air filter removed.
Or dust may accumulate on LCD panel and
Mirror degrading picture quality.
- Do not put small parts into air Intake Vents. Or It
may result in malfunction of a projector.
- The filter be careful and handle. The effect of the
filter runs out in case of a leak and it being
broken off.
AIR FILTER UNIT
AIR FILTER TOP
AIR FILTER BASE SHEET
Caution; Assembles sheet and filter base
Maintenance and Cleaning

- 15 -
Before Disassemblies :
Turn off a projector and disconnect the AC power cord.
When remove the lens shift unit, shift to the position from which the attachment screws of a lens shift unit and an
optical base unit can be removed.
Cabinet front top
unit
Cabinet front bottom unit
A
(a)
(a)
Hook
A
B
B
B
B
■Mechanical Disassemblies
Disassemble should be made following procedures in numerical order.
Following steps show the basic procedures, therefore unnecessary step may be
ignored.
Caution:
The parts and screws should be placed exactly the same position as the original, oth-
erwise it may cause loss of performance and product safety.
The wiring method of the leads and ferrite cores should be returned exactly the same
state as the original, otherwise it may cause loss of performance and product safety.
Fig.1-1
1-1 Cabinet front top unit and Cabinet front bottom unit removal.
Note :Be careful not to damage Hook. The cabinet front top unit is being fixed with cabinet front bottom by hook.
1. Remove 2 screws-A.
Push part(a) and pull the Cabinet front top unit upward.
2. Remove 4 screws-B and remove the Cabinet front bottom
unit.
(See Fig.1-1)
Refer to Lens replacement and installation manual.
Screw
Screw
Lens shift unit is moved to the position
from which an attachment screws can
be removed, as shown in a figure.
Lens shift unit
Screws Expression
(Type Diameter x Length) mm
T type M Type
Tapping screw Machine screw

- 16 -
Cover lens-A
Mounting cover lens-A
Spring coil-A
Cabinet front top
Mounting cover lens-B
Cover lens-A
Spring
coil-B
Cabinet front bottom
Fig.1-3
Fig.1-4
1-3 Cabinet front top unit disassemblies.
1. Remove 4 screws and remove the Mounting cover
lens-A.
2. Remove 2 Spring coils and remove Cover lens-A.
(See Fig.1-3)
1-4 Cabinet front bottom unit disassemblies.
1. Remove 4 screws and remove the Mounting cover lens-B.
2. Remove 2 Spring coils and remove Cover lens-A.
(See Fig.1-4)
Mechanical Disassemblies
Cabinet front unit
A
A
A
AA
A
A
A
A
A
A
Fig.1-2
1-2 Cabinet front unit removal.
1. Remove 11 screws and remove the Cabinet front unit.
(See Fig.1-2)

- 17 -
A
B
B
BB
A
AA
Mounting SP-B
Mounting SP-D
Mounting SP-A
Mounting SP-C
1-6 Speaker units disassemblies.
1. Remove 4 screws-A and remove the Mounting SP-D.
2. Remove 4 screws-B and remove the Mounting SP-C.
(See Fig.1-6)
Fig.1-6
Mechanical Disassemblies
A
A
A
A
CC
BB
BB
1-5 Speaker boxes and Front LED Board removal.
1. Remove 4 screws-A and remove the Speaker box-A.
2. Remove 4 screws-B and remove the Speaker box-B.
3. Remove 2 screws-C and remove the Front LED Board.
(See Fig.1-5)
Fig.1-5
Speaker box-A
Speaker box-B
Front LED Board
Cabinet Front

- 18 -
Cabinet top unit
2-1 Cabinet-top unit removal.
1. Remove 8 screws and remove the Cabinet top unit.
(See Fig.2-1)
Fig.2-1
Fig.2-1a
Back View
Mechanical Disassemblies
Grill SP-R
Grill SP-L
Net
Net
A
B
B
C
C
DEC Inlay R/C-F
DEC Inlay A
R/C 1 Board
Cabinet front
1-7 Decoration Inlays and R/C-1 Board removal.
1. Remove screw-A and remove the R/C-1 Board.
2. Remove 2 screws-B and remove the DEC Inlay R/C-F.
3. Remove 2 screws-C and remove the DEC Inlay-A.
(See Fig.1-7)
1-8 Speaker Grills and Nets removal.
1. The bent portion is stretched and remove the Grille SP-L,
remove the Grille SP-R from cabinet front.
2. Remove the Nets.
(See Fig.1-8)
Mark the Grills as they are removed from the Cabinet front so that
they may be reassembled in the same location from which they
were removed. Be careful of the attached direction of Grills.
Fig.1-7
Fig.1-8

- 19 -
A
A
A
A
Cabinet top
DEC Inlay-B
Push Latch-A
Hinge
Hinge
BB
Hook
Remove the screws
(a)
Do not remove
2-3 Decoration Inlay-B, Push Latch-A, and Hinges removal.
1. Remove 4 screws-A and remove the 2 Hinges.
2. Remove 2 screws-B and remove the push Latch-A.
3. Remove DEC Inlay-B. (Unhook the Cabinet top and take the DEC Inlay off inside.)
Push part(a) and pull the DEC Inlay inside.
(See Fig.2-3, 2-3a)
Fig.2-3
Fig.2-3a
Mechanical Disassemblies
Lamp cover
Lamp cover
C
C
Push Latch-B
B
A
A
B
B
Button
B
Press
Cabinet top
2-2 Lamp cover and Push Latch-B removal.
1. Remove 2 screws-A and press button to open the Lamp cover.
2. Remove 4 screws-B and remove the Lamp cover.
3. Remove 2 screws-C and remove the Push Latch-B.
(See Fig.2-2, 2-2a)
Fig.2-2
Fig.2-2a

- 20 -
Terminal slots
Unit
Control Switch
Unit
MAIN Borad
A
A
A
AA
A
3Main Board removal.
1. Remove 6 screws-A and remove the Main Board.
(See Fig.3)
4-1 Control switch unit and Terminal slots unit removal.
1. Remove the Control switch unit upward.
2. Remove the Terminal slots unit upward.
(See Fig.4-1)
Fig.3
Fig.4-1
Mechanical Disassemblies