BOXLIGHT MP-45 User manual

SERVICE MANUAL
ORIGINAL VERSION
REFERENCE NO. SM5110521
BOXLIGHT MP-45t
SERVICE MANUAL
Chassis No. MR3-MP-45t00
NOTE: Match the Chassis No. on the unit’s
back cover with the Chassis No. in the
Service Manual.
If the Original Version Service
Manual Chassis No. does not match
the unit’s, additional Service
Literature is required.You must refer to
“Notices” to the Original Service
Manual prior to servicing the unit.
PRODUCT CODE
MR3E MP-45t : 1 122 185 04

2
■Contents
■Safety instructions ________________________________________________3
■Specifications __________________________________________________ 4
■Adjustments after parts replacement ________________________________ 5
■Circuit protections ______________________________________________ 6-7
● Fuse ____________________________________________________ 6
● Thermal switch ____________________________________________ 6
● Interlock switch ____________________________________________ 6
● Warning temperature and power failure protection ________________ 7
■Mechanical disassemblies ______________________________________ 8-12
■Optical parts disassemblies ____________________________________ 13-16
■LCD panel/prism ass’y replacement ________________________________ 17
■Lamp replacement ______________________________________________ 18
■Optical adjustments __________________________________________ 19-21
●Contrast adjustment ________________________________________ 19
●Condenser adjustment ______________________________________ 20
●Relay lens adjustment ______________________________________ 21
■Electric adjustments __________________________________________ 22-40
●Service adjustment menu operation____________________________ 22
●Circuit adjustments ______________________________________ 23-27
●Service adjustment data table______________________________ 28-39
●Test points and locations ____________________________________ 40
■Circuit block diagrams ________________________________________ 41-45
■Power supply lines ______________________________________________ 46
■Troubleshooting ______________________________________________ 47-51
●No power ______________________________________________ 47-48
●No picture ________________________________________________ 49
●No sound ________________________________________________ 50
●Lens motor problems ______________________________________ 51
■Control port functions ________________________________________ 52-56
■Waveforms ____________________________________________________ 57
■Cleaning ______________________________________________________ 58
■IC block diagrams ____________________________________________ 59-70
■Service parts lists __________________________________________ 71-111
●Electrical parts list ______________________________________ 71-105
●Mechanical parts list __________________________________ 106-108
●Optical parts list ______________________________________ 109-111
Drawings & Diagrams ______________________________________ A1-A17
■Parts description and reading in schematic diagram ____________________ A2
■Schematic diagrams ________________________________________ A3-A10
■Printed wiring board diagrams ________________________________ A11-A16
■Pins description of ICs, transistors, diodes __________________________ A17

3
■Safety Instructions
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 iden-
tified with the line ( ) in the schematic diagram. For continued product safety and protection of personnel
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 pro-
vided 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, adjustment 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(15kV - 25kV) 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.
DO NOT ATTEMPT TO SERVICING THE
REMOTE CONTROL UNIT.
Laser Beam may be leaked out when in disassemble
the Unit. As the Laser Beam used in this Remote con-
trol unit is harmful to the eyes.
LASER RADIATION
DO NOT STARE INTO BEAM
MAX. OUTPUT: 1mW
WAVE LENGTH: 650 ±20nm
CLASS II LASER PRODUCT
This product is complied with 21 CFR
part 1040.10
CAUTION LASER RADIATION
DO NOT STARE INTO BEAM
CLASS 2 LASER PRODUCT
LASER-STRAHLING
NICHT IN DEN STRAHL BLICKEN
LASER KLASSE 2
IEC60825-1, Am. 1 1997
MAX OUTPUT ( ) : 1 mW
WAVE LENGTH ( ) : 650±20nm

4
■Specifications
●The specifications are subject to change without notice.
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 stan-
dards against risk of fire, casualty and electrical hazards.
Projector Type Multi-media Projector
Dimensions (W x H x D) 12.6” x 6.6” x 18.5” (319mm x 168mm x 470mm)
Net Weight 20.3 lbs (9.2 kg)
LCD Panel System 1.3” TFT Active Matrix type, 3 panels
Panel Resolution 1024 x 768 dots
Number of Pixels 2,359,296 (1024 x 768 x 3 panels)
Color System PAL, SECAM, NTSC, NTSC4.43, PAL-M and PAL-N
High Definition TV SIgnals 480i, 480p, 575i, 575p, 720p, 1035i and 1080i
Scanning Frequency H-sync. 15 ~ 100kHz, V-sync. 50 ~ 100Hz
Projection Lens F 1.7 ~2.0 lens with f=48.2mm ~ 62.6mm motor zoom and focus
Throw Distance 4.6’ ~ 48.3’ (1.4m ~ 14.7m)
Motorized Lens Shift Up and Down
Projection Image Size (Diagonal) Adjustable from 31” to 400”
Horizontal Resolution 800 TV lines (HDTV)
Projection Lamp 300 watt type
Input 1/Monitor Output Jacks DVI Terminal (Digital) HDCP Compatible, HDB 15-pin Terminal (Analog)
and Stereo Mini Type Jack (Audio)
Input 2 Jacks BNC Type x 5 (G or VIDEO/Y, B or Cb/Pb, R or Cr/Pr, H and V),
Stereo Mini Type Jack (Audio)
Input 3 Jacks RCA Type x 3 (VIDEO/Y, Cb/Pb, Cr/Pr), RCA Type x 2 (Audio R and L)
and DIN 4-pin (S-Video)
Other Jacks DIN 8-pin (Control port), USB port (Series B receptacle),
and Wired Remote Jack
Built-in Speakers INT. SP. Stereo (R and L), 2 watts RMS (T.H.D. 10%)
Feet Adjustment 0˚ to 10.5˚
Voltage and AC 100 ~ 120V (5.0A Max. Ampere), 50/60Hz (The U.S.A and Canada)
Power Consumption AC 200 ~ 240V (2.5A Max. Ampere), 50/60Hz (Continental Europe)
Operating Temperature 41 ˚F ~ 95 ˚F (5˚C ~ 35˚C)
Storage Temperature 14 ˚F ~ 140 ˚F (-10˚C ~ 60˚C)
Remote Control Transmitter Wireless/Wired Remote Control, batteries AA, UM3 or R06 Type x 2
The CE Mark is a Directive conformity mark of the European Community (EC).

5
● :Adjustment necessary ❍ :Check necessary
■Adjustments after Parts Replacement
Condenser lens adjustment ❍●
Relay lens adjustment ❍●
Contrast Adjustment
R-Contrast adjustment ●
G-Contrast adjustment ●
B-Contrast adjustment ●
Output voltage adjustment ●
+16 V adjustment ●
Fan output voltage adjustment ●●
Video center adjustment ●
PSIG adjustment ●
PC pedestal adjustment ●
PC gain adjustment ●
PC gamma gain adjustment ●
PC black level adjustment ●
Video A/D reference voltage top & bottom adj. ●
Video pedestal adjustment ●
Video gain adjustment ●
Video black level adjustment ●
Component pedestal adjustment ●
Component A/D reference voltage top adjustment ●
Component gain adjustment ●
RGB pedestal adjustment ●
RGB A/D reference voltage top adjustment ●
RGB gain adjustment ●
Common center adjustment ●●
PC white balance adjustment ❍❍
Video white balance adjustment ❍❍
Disassembly / Replaced Parts
LCD/
Prism
Ass’y
Condenser
Lens
Polarized glass
RGB
Optical Adjustments
Electrical Adjustments
Sub
Power
Board
Main
Board
Relay
Lens
Power
Board

-6-
●Interlock switch
The interlock switch (SW902) cuts off the AC mains power supply
when the lamp cover is removed. After opening the lamp cover for
replacing the lamp ass’y, place the lamp cover correctly otherwise
the projector can not turn on.
●Thermal switch
There is the thermal switch (SW905) inside of the projector to
prevent the internal temperature from rising abnormally. When the
internal temperature reaches near 90˚C, turn off the AC main
power supply automatically.
The thermal switch is not reset to normal automatically even if the
internal temperature becomes normal. Reset the thermal switch
following procedure.
Check the resistance between terminals of thermal switch by
using the tester. If it has high impedance, thermal switch may be
in operative.
How to reset the thermal switch
1. Loosen 2 screws and open the lamp cover.
2. Press the reset button on the thermal switch with a sharp-
pointed tool.
CAUTION:
Before press the reset button, disconnect the AC cord from the
projector.
■Circuit Protections
This projector is equipped with the following circuit protections to operate in safety. If the abnormality occurs inside
the projector, it will automatically turn off by operating one of the following protection circuits.
●Fuse
The fuse is located inside of the projector. When either the LAMP
indicator or the READY indicator is not illuminated, fuse may be
opened. Check the fuse as following steps.
It should be used the specified fuse as follows;
How to replace the fuse
1. Remove the cabinet top following to “Mechanical
Disassemblies”.
2. Remove the fuse from fuse holder.
To install the fuse, take reversed step in the above.
Fuse Part No.: 423 025 1201
TYPE T8AH 250V FUSE
LITTEL FUSE INC. TYPE 215008
Fuse Line Filter Board
Interlock switch
Thermal switch
Lamp cover

-7-
Circuit Protections
●Warning temperature and power failure protection
The TEMP WARNING indicator flashes red and the projector will automatically turn off when the internal tempera-
ture of the projector exceeds the normal temperature or when stopping cooling fans or when the internal power
supply lines are failed.
Check the following possible causes and wait until stopping the TEMP WARNING indicator flashing.
Possible causes
- Air filter is clogged with dust particles. Remove dust from the air filter by following instructions in the “Air filter
care and cleaning” below.
- Ventilation slots of the projector are blocked. In such an event, reposition the projector so that ventilation slots are
not obstructed.
- Check if projector is used at higher temperature place (Normal operating temperature is 5 to 35 ˚C or 41 to 95˚F)
If the TEMP WARNING indicator still continues to flash, there may be defects on cooling fans or power supply cir-
cuits. Please check fan operation and power supply lines referring to the “Power Supply Lines Chart”.
Air filter care and cleaning
The removable air filter prevents dust from accumulation on the surface of the projection lens and projection mirror.
Should the air filter become clogged with dust particles, it will reduce the cooling fan’s effectiveness and may result
in internal heat build up and reduce the life of the projector.
To clean up the air filters, follow the cleaning procedure
below:
1. Turn the power off, and disconnect the AC power cord
from the AC outlet.
2. Turn the projector upside down and remove the air fil-
ters by pulling the latches of them upward.
3. Clean the air filters with brush or wash out the dust and
particles.
4. Replace each air filter properly. Make sure that the air
filters are fully inserted.
CAUTION:
Do not operate the projector with the air filter removed. The
dust is stuck on the LCD panel and the mirror, and it may
spoil the fine picture image.
Do not put the small parts into the air intake vents. It may
result in the malfunction of the projector. The air filter is
small parts. Take care that children don’t eat or swallow it.
RECOMMENDATION
We recommend to avoid dusty, smoky place for operating the projector. Using in dusty place may cause the picture
of poor quality.
When using under the dusty or smoky conditions, dust may accumulate on the LCD panel and lens inside it, and
may resultantly be projected on the screen together with the picture.
When the above symptoms are noticed, please clean up the LCD panel and lens following to the “Cleaning
Method”.
Air filters

-8-
1Remove 5 screws A, 2 screws B, and loosen 2 screws
C, and then take the Cabinet Top upward off.
Note: If you want to remove the Cabinet Front-Top only,
you do not need to remove screws A.Remove 2 screws B
and Lens Front Cover.
■Mechanical Disassemblies
Mechanical 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 otherwise it may cause loss of
performance and product safety.
Fig.1
1Turn the Lens Front Cover counter-clockwise and to take
it off by pulling forward as shown in Fig.2-1.
2Remove the Cabinet Front-Top, Lens Cover Holder and
Lens Cover upward off.
3Remove 2 screws Dto take the Cabinet Front off.
4Remove the RC Board and speakers on the Cabinet
Front.
Fig.2-2
Cabinet Top removal
1
Cabinet Front removal
2
UP
Fig.2-1
C
B
A
A
A
A
B
A
D
D
Cabinet Front-Top
Lens
Front
Cover
Lens Cover Holder
Cabinet Front
Lens Cover
C

-9-
Mechanical Disassemblies
1Remove 6 screws to take the Main Board upward.
Fig.3
Fig.4
1Remove 1 screw A and take the Rear Panel ass’y
upward off.
2Remove 4 screws Bto take the fan (FN905) off.
3Remove 5 screws Cand 1 screw Dto take AV Board
from the Rear Panel ass’y off.
4Remove 2 screws Eand grounding leads and then pull
up the I/F Board and Holder assy from the bottom cabi-
net.
5Remove 4 screws Fto take the I/F Board.
Main Board removal
3
AV, I/F Board & Rear Panel removal
4
Main Board
A
B
B
B
B
C
D
Rear Panel Ass’y
FN905
AV Board
I/F Board
F
F
F
FEE

-10-
Mechanical Disassemblies
1Remove 4 screws Ato take the Ballast Cover upward
off.
2Remove 3 screws Bto take the Fan (FN904) and the
Fan mounting base off.
3Remove 2 screws Cto take the Fan (FN904) off from
the Fan mounting base.
4Remove the Sub Power Board and Drive Board by
pulling them upward.
Fig.5
Lamp Ballast Unit removal
5
A
Ballast Board
FN904
Sub Power
Board
Drive Board
A
A
A
CC
Ballast Cover
1Remove 1 screw Aand then remove the holder.
2Remove 2 screws Band 4 screws C(small) and pull the
Optical Unit upward off.
3Remove 4 screws Dto take the Fan (FN906) off.
4Remove 1 screws Eto take the Fan (FN903) off and 2
screws Fto take the air duct off.
5Remove 3 screws Gto take the Fan (FN907) off.
Fig.6
Optical Unit removal
6
FN906
FN903
Optical Unit
B
B
CC
CC
D
D
D
E
F
F
A
FN907
G
G
G
B
B
B

-11-
1Remove 2 screws Ato take the Prism Base ass’y
upward off.
2Remove 2 screws Bto take the Lens Shift Motor and
Sensor SW Holder from the Base.
Mechanical Disassemblies
1Remove 3 screws Ato take the Power Board off.
2Remove 4 screws Bto take Holder off from the cabinet
bottom.
Fig.8
Fig.7
Prism Base removal
7
Power Board removal
8
Prism Base Ass’y
Motor and
Sensor Holder
B
B
A
A
Power Board
Power Board
Holder
B
B
A
A
B
B
A

1Remove 1 screw A to take Interlock Switch(SW902).
2Remove 2 screws B to take Filter Board Holder and
remove 2 screws Cto take Filter Board from the Holder.
3Remove 1 screw D to take Thermal Switch(SW905).
-12-
Mechanical Disassemblies
Fig.9
Filter Board & Interlock SW & Thermal SW
removal
9
D
Interlock Switch
(SW902)
Filter Board
C
C
A
B
B
Holder
Thermal Switch
(SW905)
1Remove 4 screws Ato take Air-duct Top off.
2Remove 1 screw B(small) and 1 screw C(big) to take
Duct Cover-A.
3Remove 2 screws Dto take Fan (FN901) off.
4Remove 1 screw E(small) and 2 screws F(big) to take
Air-duct-A and Fan (FN902) off.
Fig.10
Fans (FN901, FN902) removal
10 A
A
AA
B
C
D
D
EF
F
F
Duct
Cover
-A
FN901
FN902
Air-duct-A
Air-duct
Top
Duct
Cover-B

-13-
■Optical Parts Disassemblies
Before taking this procedure, remove Cabinet Top and Main Board following to the “Mechanical Disassemblies”.
Disassembly requires a 2.0mm or 2.5mm hex wrench and a slot screwdriver.
1Remove each hex screw and pull the Polarized Glass-In ass’y upward.
2Remove a stopper and take the glass off upward.
Polarized Glass-In removal
Fig.2-1
Fig.2-2
Stopper
polarized glass
*Glass should be placed as the
printed marker comes to the
upper left corner.
Phase Sheet
Part No. is printed on
upper side.
Lens attachment
4.0mm hex wrench
Fig.1-2Fig.1-1
B
B
B
B
A
1Shift the Projection lens to the low end by the LENS SHIFT function.
2 Remove Cabinet Front-Top following to the chapter “Mechanical
Disassemblies”.
3Slide the lens lock lever Aon the projector to "UNLOCK"(UPPER) posi-
tion and remove the Projection Lens ass’y off.
Note : When making unlocking, attach your hand to prevent the lens fall.
4 Disconnect the connector and remove 4 screws B and take the
Projection lens from the lens attachment.
Projection Lens removal
Connector

-14-
1Remove 4 hex screws Aand take the LCD/Prism ass’y off upward.
2Remove 3 screws B and take the Glass Holder, and then pull the polarized
Glass-Out and the wide view glass upwards off. These glasses are mount-
ed for R, G and B LCD panels respectively.
Note:
To avoid the CG and focus alignments slipping off, please be careful to han-
dle the LCD/Prism ass'y.
LCD Panel/Prism Ass’y
Note:
Do not replace the LCD panel
separately otherwise it can
not obtain proper picture.
Fig.4-1
Polarized Glass-Out and Wide view Glass removal
A
A
A
Optical Pats Disassemblies
1Remove 2 hex screws Aand pull the Relay Lens ass’y upward.
2 Remove 2 screws Bto take the Lens off from the holder.
Note:
There is no mounting direction of the lens.
A
Fig.3-2
Fig.3-1
B
B
Holder
Relay Lens
A
Relay Lens disassembly
*2 Glasses should be placed as the
sheet attached side comes to
the LCD panel side. Fig.4-2
BB
B
Pre-Polarized
Glass-Out (*1)
Phase Sheet
Wide view Glass
Phase Sheet
Polarized Glass-
Out
*1 Pre-polarized Glass-
Out should be placed
into the Green and
Blue LCD panels.
Phase Sheet (*1)

-15-
Optical Parts Disassemblies
1Remove 7 screws to take the Optical Unit Top off upward.
Optical Unit Top removal
1Remove 2 hex screws Aand take the Condenser Lens ass’y.
2Release 4 hooks B to take the Lens off from the holder.
A
Fig.6-2
Fig.6-1
B
Holder
Condenser Lens
A
Condenser Lens disassembly
*Lens should be placed
as the flat surface side
comes to the holder
side.
Condenser Lens
Fig.5

-16-
Optical Parts Disassemblies
When the optical parts in the optical unit mounting or assembling, the
parts must be mounted in the specified location and direction as
shown in figure below.
14
12
8
Fig.7
3
14 1
24
9
Locations and Directions
13
6
1Condenser lens (R)
2Condenser lens
3Condenser lens
4Mirror (B)
5Optical filter (UV cut)
6Dichroic mirror (B
7Dichroic mirror (G)
8Mirror (W)
9Condenser lens (IN)
10 PBS (prism beam splitter)
11 Integrator lens (OUT)
12 Integrator lens (IN)
13 Relay lens (IN)
14 Mirror (R)
Key No. Description
7
10
11
5
The printed marker
comes this side.
The cutting corner
comes to this side up.
Place the lens as the both
rugged surface sides in the
same direction.
The printed marker
comes this side.

-17-
■LCD Panel/Prism Ass’y Replacement
1Remove the cabinet top and main board following to
“Mechanical Disassemblies”.
2Remove 4 screws by using the 2.0 mm hex driver and
take the LCD Panel/Prism ass’y off upward from the
optical unit.
LCD Panel/Prism
Ass’y
After replacing or installing the LCD Panel/Prism ass'y,
please make sure to obtain the best focus in both TELE
and WIDE zoom. If the focus adjustment is required,
please adjust the positioning of LCD Panel/Prism Ass’y by
following the below procedure.
Mounting Procedure:
1 Loosen 4 screws Aon the LCD Panel/Prism ass'y with
2.0 mm hex driver.
2Turn the projector on and project the image with WIDE
zoom, and adjust the FOCUS control to obtain the best
focus.
3Turn the ZOOM control to the TELE position.
4Move the LCD Panel/Prism Ass’y backward or forward
(about 0mm ~ 0.8mm) to obtain the proper focus.
Confirm the focus at TELE and WIDE zoom.
5Tighten 4 screws Ato fix the LCD Panel/Prism ass'y.
Top ViewA
A
A
A
LCD Panel/Prism Ass’y
Note:
Do not replace the LCD
panel separately otherwise
it can not obtain proper pic-
ture.
IMPORTANT NOTICE on LCD Panel/Prism Ass'y Replacement
LCD panels used for this model can not be replaced separately. Do not disassemble the LCD Panel/Prism Ass’y.
These LCD panels are installed with precision at the factory. When replacing the LCD panel, should be replaced
whole of the LCD panels and prism ass’y at once.
After replacing LCD Panel/Prism ass’y, please check the following adjustments.
- Check the “Condenser Lens Adjustment” and “Relay Lens Adjustment” following to chapter “Optical
Adjustment”.
- Check the “White Balance Adjustment” and “Common Centre Adjustment” following to chapter
“Electrical Adjustment”.
- Check the white uniformity on the screen.
If you find the color shading, please adjust the white uniformity by using the proper computer and
“Color Shading Correction” software supplied separately.
LCD Panel/Prism Ass’y removal
Note on LCD Panel/Prism Ass’y Mounting

-18-
WARNING:
- For continued safety, replace with a lamp assembly of the same type.
- Allow the projector to cool for at least 45 minutes before you open the
lamp cover. The inside of the projector can become very hot.
- Do not drop the lamp module or touch the glass bulb! The glass can
shatter and cause injury.
Procedure
1Turn off the projector and disconnect the AC cord. Allow the projector to
cool for at least 45 minutes.
2Loosen 2 screws with a screwdriver and open the lamp cover.
3Loosen 2 screws and pull out the lamp assembly by grasping the handle.
4Replace the lamp assembly securely and tighten 2 screws.
5Close the lamp cover and tighten 2 screws.
6Connect the AC cord to the projector and turn on.
Note:
- Do not reset the Lamp Replace Counter, except after lamp is replaced.
- The projector can not be turned-on with lamp cover removed, because
when the lamp cover is removed, the interlock switch is also released to
switch off the mains power for safety.
7Reset the Lamp Replace Counter, see below explanation.
■Lamp Replacement
1Turn the projector on, and press the MENU button
and the on-screen menu will appear. Press the POINT
LEFT/RIGHT buttons to move a red frame pointer to
SETTING menu icon.
2Press the POINT DOWN button to move a red frame
pointer to “Lamp counter reset” and then press the
SELECT button. The message “Lamp replace counter
reset?” is displayed. Move the pointer to [Yes] and the
press the SELECT button.
3Another confirmation dialog box appears and select
[Yes] to reset Lamp Replace Counter .
Please refer to the owners manual for further informa-
tion.
Recommendation
Should the air filter become clogged with dust particles,
it will reduce the cooling fan’s effectiveness and may
result in internal heat build up and short lamp life. We
recommend cleaning the air filter after the projection
lamp is replaced.
Refer to “Air Filter Cleaning”.
The LAMP REPLACEMENT indicator will illuminate
when the Lamp Replace Counter reaches 1500
hours. This is to indicate that lamp replacement is
required.
You can check the lamp replace counter following to
below procedure.
1Press and hold the POWER button on the projector or
the remote control unit for more than 20 seconds.
2 The Lamp replace Counter service menu appears
on the center of the screen briefly.
Remark :
The upper display "Projector Counter" is not reset by
resetting Lamp Replace Counter.
Lamp cover
Lamp replace counter data
ORDER REPLACEMENT LAMP
Type No.Service Parts No.
POA-LMP67 610 306 5977
How to reset Lamp Replace Counter
How to check Lamp Replace Counter
Screws
Handle
Lamp Assembly

-19-
B-Polarized Glass
Mounting Ass'y
and Base
R-Polarized Glass
Mounting Ass'y
and Base
G-Polarized Glass
Mounting Ass'y
and Base
A
A
A
Fig.1-2
■Optical Adjustments
Main Board
Before taking optical adjustments below, remove the Cabinet Top and Main Board following to the “Mechanical
Disassemblies”
Adjustments require a 2.0mm hex wrench and a slot screwdriver.
Note: Do not disconnect connectors K8L, K8X, K8D, K8G and K8E on the main board, because the projector can
not turn on due to operate the power failure protection.
Fig.1-1
Polarized glass
mounting base
A
Polarized glass
mounting ass'y
[Before Adjustment]
- Input a 100% of black raster signal.
[R/G/B-CONTRAST ADJUSTMENT]
1Loosen a screw A(Fig.1-1/1-2) on the polarized glass mounting
base which you intend to adjust.
2Turn the polarized glass mounting ass'y and the polarized glass
mounting base at the same time as shown in Fig.1-1 to obtain the
darkest brightness on the screen.
Note: Both of them should be moved at the same time and in the
same direction.
3Tighten the screw Ato fix the polarized glass mounting base.
Repeat steps 1 to 3 for remaining polarized glasses.
Contrast adjustment

-20-
Optical Adjustments
Fig.2-2
1 Turn the projector on by a state of without FPC cables.
2 Adjust the adjustment base of condenser lens ass’y to make color
uniformity in white.
1) If the shading appears on the left or right of the screen as
shown in Fig.2-1, loosen 2 screws Awith the 2.0mm hex driv-
er, and adjust the slot Bto make color uniformity in green by
using a slot screwdriver.
2) If the shading appears on the top or bottom of the screen as
shown in Fig.2-2, loosen 1 screw Cwith the 2.0mm hex driver,
and adjust the slot Dto make color uniformity in green by using
a slot screwdriver
3 Tighten screws Aand Cto fix the Condenser lens unit.
Note:
The relay lens adjustment must be carried out after completing this
adjustment.
y
x
Moving of Slot D
Slot D
ab
a
b
Moving of slot B
Fig.2-1
Slot B
A
C
y
x
White
White
Condenser Lens adjustment
A