Sanyo XC50 - PLC XGA LCD Projector User manual

Multimedia Projector
SERVICE MANUAL
PRODUCT CODE
PLC-XC50 PLC-XC55
1 122 435 00 (KK7AC) 1 122 437 00 (KL7AC)
1 122 436 00 (LK7AC) 1 122 438 00 (LL7AC)
1 122 436 02 (LK7CC) 1 122 438 02 (LL7AC)
Original Version
REFERENCE NO. SM5110979-00
FILE NO.
Model No. PLC-XC50
PLC-XC55
U.S.A, Canada
Europe, U/K, Asia
Chassis No. KK7-XC5000
KL7-XC5500
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 re-
quired. You must refer to “Notices” to the Original Service
Manual prior to servicing the unit.

-2-
Contents
SERVICE MANUAL....................................................... 1
Contents ........................................................................ 2
Safety Instructions......................................................... 3
Safety Precautions ..................................................... 3
Product Safety Notice................................................. 3
Service Personnel Warning ........................................ 3
Specifications ................................................................ 4
Circuit Protections ......................................................... 5
Thermal switch ........................................................... 5
Lamp cover switch...................................................... 5
Filter switch................................................................. 5
Fuse............................................................................ 6
Warning temperature and power failure protection..... 6
Maintenance.................................................................. 7
Replacing the Filter Cartridge..................................... 7
Resetting the Filter Counter........................................ 8
Resetting the Scroll Counter....................................... 8
Lamp Replacement .................................................... 9
Resetting the Lamp Counter..................................... 10
How to check Lamp Used Time................................ 11
Cleaning ................................................................... 11
Security Function Notice.............................................. 12
Security Function Disable......................................... 12
Mechanical Disassembly............................................. 13
Optical Parts Disassembly........................................... 18
Adjustments................................................................. 24
Adjustments after Parts Replacement ...................... 24
Optical Adjustments..................................................... 25
Contrast adjustment ................................................. 25
Integrator lens adjustment ........................................ 26
Relay lens-Out adjustment ....................................... 27
Electrical Adjustments ................................................. 28
Service Adjustment Menu Operation ........................ 28
Memory IC (IC1371) Replacement........................... 28
Circuit Adjustments................................................... 29
Test Points and Locations......................................... 34
Service Adjustment Data Table................................. 35
Chassis Block Diagrams.............................................. 55
Chassis over view..................................................... 55
System control.......................................................... 56
Lamp control............................................................. 57
Audio circuit .............................................................. 58
Power supply & protection circuit ............................. 59
Fan control circuit ..................................................... 60
IIC bus control circuit ................................................ 61
Troubleshooting........................................................... 62
Indicators and Projector Condition ........................... 62
Troubleshooting........................................................... 63
No Power.................................................................. 64
No Picture................................................................. 65
No Sound.................................................................. 66
Control Port Functions................................................. 67
Scaler I/O Port Functions (PW190) .......................... 67
Waveform .................................................................... 68
IC Block Diagrams....................................................... 69
Electrical Parts List...................................................... 75
Electrical Parts Location ........................................... 76
Electrical Parts List ................................................... 77
Mechanical Parts List .................................................. 95
Cabinet Parts Location ............................................. 95
Optical Parts Location .............................................. 96
Mechanical Parts List ............................................. 100
Diagrams & Drawings..................................................A1
Parts description and reading in schematic diagram...A2
Schematic Diagrams ...................................................A3
Printed Wiring Board Diagrams...................................A9
Pin description of diode, transistor and IC.................A13
Note on Soldering......................................................A14

-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
identified with the line ( ) in the schematic diagram. For continued product safety and protection of per-
sonnel 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 (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.

-4-
Specifications
Mechanical Information
Projector Type Multi-media Projector
Dimensions (W x H x D) 410.0 mm x 85.0 mm x 262.8 mm (Not including protrusions)
Net Weight 8.82lbs (4.0 kg)
 FootAdjustment 0˚to10.0˚
Panel Resolution
LCD Panel System 0.63" TFT Active Matrix type, 3 panels
Panel Resolution 1,024 x 768 dots
Number of Pixels 2,359,296 (1,024 x 768 x 3 panels)
Signal Compatibility
Color System PAL, SECAM, NTSC, NTSC4.43, PAL-M, and PAL-N
High Definition TV Signal 480i, 480p, 575i, 575p, 720p, 1035i, and 1080i
Scanning Frequency H-sync. 15 ~ 100 KHz, V-sync. 50 ~ 100 Hz
Optical Information
Projection Image Size (Diagonal) Adjustable from 40" to 300"
Projection Lens F 1.60-1.76 lens with f =22.33 mm ~ 26.80 mm with manual zoom and focus
Throw Distance 4.6' ~ 41.3' (1.4 m ~ 12.6 m)
Projection Lamp 220W
Interface
Video Input Jack RCA Type x 1
S-video Input Jack Mini DIN 4 pin x 1
Audio Input Jacks RCA Type x 2
Computer Input 1/DVI-I Digital/Analog RGB (DVI-I ) Terminal x 1
Computer Input 2/Component Input Analog RGB (Mini D-sub 15 pin) Terminal x 1
Monitor Output Analog RGB (Mini D-sub 15 pin) Terminal x 1
Computer2/ Component Audio Input Jack
Mini Jack (stereo) x 1
Computer1 Audio Input Jack Mini Jack (stereo) x 1
Control Input Mini D-sub 9 pin x 1
Audio Output Jack Mini Jack (stereo) x 1 (Variable)
Audio
Internal Audio Amp 7.0 W RMS
Built-in Speaker 1 speaker, ø1.46" (37mm)
Power
Voltage and Power Consumption AC 100 ~ 120 V (3.4A Max. Ampere), 50/60 Hz (The U.S.A and Canada)
AC 200 ~ 240 V (1.7A Max. Ampere), 50/60 Hz (Continental Europe and The U.K.)
Operating Environment
 OperatingTemperature 41˚F~95˚F(5˚C~35˚C)
 StorageTemperature 14˚F~140˚F(-10˚C~60˚C)
Remote Control
Battery AA or LR6 1.5 V ALKALINE TYPE x 2
 OperatingRange 16.4'(5m)/±30˚
Dimensions 1.9" (W) x 0.87" (H) x 5.7" (D) (49 mm x 22 mm x 145.3 mm)
Net Weight 3.53 oz (100 g) (including batteries)
●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 stan-
dards against risk of fire, casualty and electrical hazards.

-5-
Lamp cover switch
The lamp cover switch (SW901) cuts off the drive signal to the lamp
circuit when the lamp cover is removed or not closed completely.
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 (SW902) inside of the projector to detect
the internal temperature rising abnormally. When the internal tem-
perature reaches near 80˚C, the thermal switch opens to stop the
operation of the power supply circuit.
The thermal switch cannot be reset itself automatically even if the
internal temperature becomes normal. Reset the thermal switch
following to the below procedure.
How to reset the thermal switch
1. Remove the cabinet top.
2. Press the reset button on the thermal switch with the screwdriver.
CAUTION:
Before press the reset button, make sure that the AC cord must be
disconnected from the AC outlet.
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.
Thermal switch (SW902)
Circuit Protections
Lamp cover switch
(SW901)
Filter switch
The filter switch (SW903) is to detect the condition of filter cartridge
installation. The projector can not turn on if the filter cartridge is not
installed correctly. Check the handle on the filter cartridge is set into
"Close" position.
Filter switch (SW903)

-6-
Circuit Protections
The projector will be automatically turned off when the internal temperature of the projector is abnormally high, or the
cooling fans stop spinning, or the power supplies in the projector are failed.
- If the WARNING TEMP. indicator is flashing, it may detect the abnormal temperature inside the projector. Check
the following possible causes and wait until the WARNING TEMP. indicator stops flashing, and then try to turn on
the projector.
- If the WARNING TEMP. indicator lights red, it may defect the cooling fans or power supply circuits. Check fans
operation and power supply lines referring to the chapter “Power supply & protection circuit” in the Chassis Block
Diagram section.
Possible causes
- This projector has an electrically operated filter which helps you to replace the filter easily. The projector monitors
the condition of the filter at all time and replaces a filter with a new one automatically hen it detects the clogging. if
the projector reaches a time set in the timer, please replace the filter by following instructions in the “Replace the
Filter Cartridge” 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)
The projector is shut down and the WARNING
TEMP. indicator emits a red light .
When the projector detects an abnormal condition, it is
automatically shut down to protect the inside and the
WARNING TEMP. indicator becomes red. In this case,
disconnect the AC power cord and reconnect it, and then
turn the projector on once again for check. If the projector
cannot be turned on and the WARNING TEMP. indicator
still emits a red light it may detect the failure of cooling fans
or power supply circuits.
CAUTION
DO NOT LEAVE THE PROJECTOR WITH THE
AC POWER CORD CONNECTED UNDER AN AB-
NORMAL CONDITION. IT MAY RESULT IN FIRE
OR ELECTRIC SHOCK.
Top Control
WARNING
lights red
Warning temperature and power failure protection
Fuse
A fuse(F601) is located inside of the projector. When the POWER
indicator is not lightning, the fuse may be opened. Check the fuse
as following steps.
The fuse should be used with the following type;
Fuse Part No.: 323 021 7804
TYPE 6.3AH 250V FUSE
LITTLE FUSE INC. TYPE 21506.3
How to replace the fuse
1. The fuse is placed on the filter board. Remove the cabinet top
and main board and AC Assembly following to the "Mechanical
Disassemblies".
2. Take the fuse off from fuse holder on the Filter board and replace
the new one with the specified type.
To install the fuse, take reversed steps above.
Fuse
AC Assembly

-7-
Maintenance
Turn off the projector, and unplug the AC power cord
from the AC outlet.
First, clean up the dust on the projector and around
the air vents.
Loosen 2 screws of the filter cover with a screwdriver
and open the filter cover.
Put the new one back into the position and rotate
back the handle. Make sure that the filter cartridge is
properly and fully inserted. Close the filter cover and
tighten the 2 screws back into position.
CAUTION
Make sure the filter cartridge is inserted in the pro-
jector. If the filter cartridge is not inserted, the pro-
jector cannot be turned on.
Do not put anything into the air vents. Doing so may
result in malfunction of the projector.
Reset the filter counter and the scroll counter.
Filter cover
Replacing the Filter Cartridge
Rotate the handle of the filter and pull out the filter
cartridge. Screws
Filter cartridge
RECOMMENDATION
We recommend avoiding dusty/smoky environments
when operating the projector. Usage in these environ-
ments may cause a poor image quality.
When using the projector under dusty or smoky condi-
tions, dust may accumulate on a lens, liquid crystal pan-
els, or optical elements inside the projector. Such condi-
tion may degrade the quality of the projected image.
When the symptoms above are noticed, contact your
authorized dealer or service station for proper cleaning.
ORDER REPLACEMENT FILTER CARTRIDGE
Replacement filter cartridge can be ordered through your
dealer. When ordering, give the following information to
the dealer.
 ●  ModelNo.ofyourprojector
PLC-XC50/PLC-XC55
 ●  ReplacementFilterCartridgeTypeNo.
POA-FIL-063
(ServicePartsNo.6103397665)
Connect the AC power cord to the projector and turn
on the projector.
7
CLOSE
handle
OPEN
1
2
3
4
5
6
handle

-8-
Maintenance
Be sure to reset the Scroll counter after replacing the
filter cartridge.
Press the MENU button to display the On-Screen
Menu. Use the Point ◄► buttons to move the red
frame pointer to the Setting Menu icon.
Use the Point ▲▼ buttons to move the red frame
pointer to Filter counter and then press the SE-
LECT button. A dialog box appears showing the
Used time option and the Scrolls remaining option.
Use the Point ▲▼ buttons to select Scroll(s) re-
maining.
1
2
Resetting the Scroll Counter
Another confirmation dialog box appears, select
[Yes] to reset the Scroll counter.
3Scroll(s) remaining shows the number of the re-
maining scrolls and the Reset option. Select Reset
and the “Scroll counter Reset?” appears. Select
[Yes] to continue.
4
Be sure to reset the Filter counter after replacing the fil-
ter and the filter cartridge.
Press the MENU button to display the On-Screen
Menu. Use the Point ◄► buttons to move the red
frame pointer to the Setting Menu icon.
Use the Point ▲▼buttons to move the red frame
pointer to Filter counter and then press the SE-
LECT button. A dialog box appears showing the
Used time option and the Scrolls remaining option.
Use the Point ▲▼ buttons to select Used time.
1
2
Resetting the Filter Counter
Another confirmation dialog box appears, select
[Yes] to reset the Filter counter.
3Used time shows the total accumulated time of the
filter use, a timer setting option, and the Reset op-
tion. Select Reset and the “Filter counter Reset?”
appears. Select [Yes] to continue.
4
Filter counter
Select Reset and
the “Filter counter
Reset?” appears.
Set the red frame pointer to the item and
press the SELECT button.
Select [Yes],
then another
confirmation box
appears.
Select [Yes] again
to reset the Filter
counter.
Scroll counter
Select Reset and the
“Scroll counter Re-
set?” appears.
Set the red frame pointer to the
item and press the SELECT
button.
Select [Yes], then
another confirma-
tion box appears.
Select [Yes] again
to reset the Scroll
counter.

-9-
When the life of the projection lamp of this projector
draws to an end, the Lamp replacement icon appears
on the screen and LAMP REPLACE indicator lights yel-
low. Replace the lamp with a new one promptly. The tim-
ing when the LAMP REPLACE indicator should light is
depending on the lamp mode.
Lamp Replacement
Top Control
Lamp replacement icon
✔Note:
• The Lamp replacement icon will not appear
when the Display function is set to “Off”, dur-
ing “Freeze”, or “No show”.
Maintenance
This indicator is yellow
w h e n t h e l i f e o f t h e
projection lamp draws to
an end.
For continued safety, replace with a lamp of the same type. Do not drop a lamp or touch a glass bulb! The
glass can shatter and may cause injury.
Allow a projector to cool, for at least 45 minutes before you open the Lamp cover. The inside of the projector can become
very hot.
CAUTION
CAUTION
When replacing the lamp because it has stopped illuminating, there is a possibility that the lamp may be
broken.
If replacing the lamp of a projector which has been installed on the ceiling, you should always assume that the
lamp is broken, and you should stand to the side of the lamp cover, not underneath it. Remove the lamp cover
gently. Small pieces of glass may fall out when the lamp cover is opened. If pieces of glass get into your eyes
or mouth, seek medical advice immediately.
CAUTION
Refer to the next page for replacing a lamp.

-10-
Maintenance
Follow these steps to replace the lamp.
Turn off the projector and disconnect the AC power
cord. Allow the projector to cool for at least 45
minutes.
Loosen 2 screws of the lamp with a screwdriver and
pull out the lamp upwards vertically by grasping the
handle.
Replace the lamp with a new one and tighten the 2
screws back into position. Make sure that the lamp
is set properly. Replace the lamp cover and tighten
the screw.
Loosen the screw with a screwdriver, slide and open
the lamp cover.
Connect the AC power cord to the projector and turn
on the projector.
Reset the lamp replacement counter.
See "Resetting the Lamp Counter" on the next page .
1
2
3
4
5
6
ORDER REPLACEMENT LAMP
Type No. POA-LMP127
Service Parts No. 610 339 8600
Lamp
Handle
Screw
Lamp Cover
Screw
Screw
Be sure to reset the Lamp replacement counter after the lamp is replaced. When the Lamp replacement counter is
reset, the LAMP REPLACE indicator stops lighting.
Turn the projector on, press the MENU button to
display the On-Screen Menu. Press the Point ◄►
buttons to move the red frame pointer to the Setting
Menu icon.
Press the Point ▲▼ buttons to move the red frame
pointer to the Lamp counter function and then press
the SELECT button. The first dialog box appears
and shows the total accumulated time of the lamp
usage and the reset option. If you select "Reset",
a "Lamp replacement counter Reset?" message
appears. Select [Yes] to continue.
Another confirmation dialog box appears, select
[Yes] to reset the Lamp replacement counter.
✔Note:
• Do not reset the Lamp replacement counter without
implementation of lamp replacement. Be sure to
reset the Lamp replacement counter only after
replacing the lamp.
1
2
3
Select [Yes], then
another confirmation
box appears.
Select [Yes] again
to reset the lamp
counter.
To reset the lamp counter, move the
pointer to Reset and then press the
SELECT button. “Lamp replacement
counter Reset?” dialog box is displayed.
Resetting the Lamp Counter

-11-
Maintenance
How to check Lamp Used Time
The LAMP REPLACE indicator will light yellow when
the total lamp used time (Corresponding value) reaches
3,000 hours. This is to indicate that lamp replacement
is required.
The total lamp used time is calculated by using the be-
low expression,
Total lamp used time = Teco + Tnormal x 2
Teco: used time in the Eco mode
Tnormal : used time in the Normal mode and Auto
mode.
You can check the lamp used time following to the below
procedure.
1Press and hold the ON/STAND-BY button on the pro-
jector for more than 20 seconds.
2 The projector used time and lamp used time will be
displayed on the screen briefly as follows.
Counter
Projector 525H
Lamp
Normal 150H
Eco 375H
Corresponding value 675H
Total lamp used time
Projector used time
Cleaning
Cleaning with air spray
1. Remove the cabinet top following to “Mechanical Dis-
assemblies”.
2. Clean up the LCD panel and polarizing plate 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 nozzle only. Be very 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.
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.
Disassembly Cleaning
Disassembly cleaning method should only be performed
when the unit is considerable dirty and cannot be suf-
ficiently cleaned by air spraying alone.
Be sure to readjust the optical system after perform-
ing 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, re-
move the LCD panel unit following to “LCD panel re-
placement”.
3. Clean the optical parts with a soft cloth. Clean ex-
tremely dirty areas using a cloth moistened with al-
cohol.
Caution:
The surface of the optical components consists of mul-
tiple 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 cir-
cuit, never use any liquids (water, etc.) to clean the unit.
Use of liquid may cause the unit to malfunction.

-12-
Security Function Notice
This projector provides security functions such as "Key lock", "PIN code lock" and "Logo PIN code lock". When the
projector has set these security function on, you are required to enter correct PIN code to use the projector. If you
do not know the correct PIN code to the projector, the projector can no longer be operated or started. In this case,
you must reset those function first according to the resetting procedure described below and then check up on the
projector.
Resetting procedure
1Disconnect the AC power cord from the AC outlet.
2As pressing the SELECT button on the projector, connect the AC power cord into an AC outlet again. Keep
pressing the SELECT button until the POWER indicator lights continuously.
This is complete the resetting of the security function. The PIN code lock and Logo PIN code lock are reset as
the initial PIN code at the factory and the Key lock function is disabled.
Please refer to the owner's manual for further information of the security functions.
Function Description
Key lock
Locks operation of the top control or the remote con-
trol.
If the Key lock is enabled with top control lock, the pro-
jector can no longer be started.
Initial setting: Key lock function is disabled
PIN code lock
Prevents the projector from being operated by an un-
authorized person.
Initial code: “1234”
Logo PIN code lock
Prevents an unauthorized person for changing the
start-up logo and captured image on the screen.
Initial code: “4321”
Security Function Disable

-13-
zCabinet Top, Lamp Cover, Filter Cover and Lens Cover removal
Mechanical Disassembly
Mechanical disassembly should be made following procedures in numerical or-
der.
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.
Screws Expression
(Type Diameter x Length) mm
T type M Type
Holder of Front Glass
Fig.1
Cabinet top
A(M3x8)x8
1. Remove 8 screws A (M3X8) to remove the Cabinet Top.
2. Loosen Screw B (M3X7) to remove the Lamp Cover.
3. Loosen 2 Screws B (M3X7) to remove the Filter Cover.
4. Remove the Control Buttons.
5. Remove the Front Glass and the Front Ring.
6. Remove 2 Screws C (T3X6) to remove the Holder of Front Glass. Remove 2 Screws D
(T3X6) to remove the Holder of Lens Shutter.
Control Buttons
A
B(M3x7)x2
B(M3x7)x1
D(T3x6)x2
A
A
A
A
A
A
C(T3x6)x2
Front Ring
Holder of Lens
Shutter
Lamp Cover
Filter Cover
Front Glass
Lens Shutter
C
D
Turn the Front Ring anticlockwise and
remove the Front Glass.

-14-
Mechanical Disassembly
xMain Board , Control Board, Rear Panel and Fan(FN902) removal
1. Remove 2 screws A (T3x8) and 2 screws B (M2.5x6) to remove the Control
Board from the Control board holder.
2. Remove 2 screws D (M4x8), 2screws E (T3x8) and 2 screws F (M2.5x6) to
remove the main board shield.
3. Remove 2 screws G (M2.5x6) to remove the main board.
4. Unhook 3 hooks and remove the Rear Panel.
5. Remove 2 screws J (T3x8) to remove the fan (FN902).
Rear panel
Main board
G (M2.5x6)x2
Fig.2
Control board
D(M4x8)x2
FN902
Control board holder
Main board shield
J (T3x8)x2
E (T3x8)x2
F(M2.5x6)x2
A (T3x8)x2
B (M2.5x6)x2
A
B
D
E
F
G
G
SW901
Hooks

-15-
Mechanical Disassembly
Fig.3
1. Remove 6 screws A (T3x8) to remove the Optical Unit and remove 4 screws B(M2.5x4)
to remove the Projection Lens.
2. Remove the RC Board.
3 .Remove 2 screws C(T3X8) and 1 screw D(M3X6) to remove the Security Kits.
4. Remove 2 screws E(T3x8) and 2 screws F (T3x8) to remove the speaker (SP901).
5. Remove 2 screws G(T3x8) and one black screw H (T3x12) to remove fan (FN906).
cOpitcal Unit, RC Board,Security Kits, Speaker (SP901) and Fan (FN906)
Removal
Projection Lens
Optical unit
B (M2.5x8)x4
A (T3x8)x6
G (T3x8)x2
FN906
H (T3x12)
RC Board
SP901
D (M3x6)
C (T3x8)X2
E (T3x8)X2
Security
Kits
F (T3x8)X2

-16-
Mechanical Disassembly
v Filter Board, Fan(FN901), Power Board, Ballast Board and SW902
removal
Fig.4
1. Remove 3 screwsA (T3x8), 2 screws B(M4x8) to take off the Filter board ass'y and then remove 7
screws C(M3x6) to remove the Filter Board Holder, Filter Board Sheet and the Filter Board.
2. Remove 2 screws D(T3x8) to remove the fan (FN901 ).
3. Remove 2 screws E(M4x8) and 2 screws F(T3x8) to remove the power and ballast ass'y from the
cabinet bottom.
4. Remove screw G(M4x8) and 3 screws H(M3x6) to remove the Ballast Board.
5. Remove 2 screws I (T3x8) and 2 screws J (M3x6) to remove SW902.
6. Remove 2 screws K (M3x6) and a black hook to remove the power board.
7. Remove 3 screws L(T3x8) to remove the Lens Holder.
Filter Board
Holder
Filter Board
B (M4x8)X2
Filter Board
Sheet
B
C
C (M3x6)x7
C
C
C
C
A (T3x8)
C
FN901
SW902
Power Board
D (T3x8)x2
E (M4x8)x2
E
F (T3x8)x2
G (M4x8)
Ballast Board
H (M3x6)x3
Spacer_Sheet of
Power_Back
I (T3x8)x2
J (M3x6)x2
K (M3x6)x2
White
hooks
Black
hooks
I
J
K
H
H
F
Shileld Cover
A
A
L (T3x8)
L
L
Lens Holder

-17-
Mechanical Disassembly
bDuct, Wind Velocity Sensor (S901), Sensor Board, Motor
(M901), SW903, Filter and Fans (FN903, FN904, FN905) Removal
Fig.5
1. Remove 4 screws A (T3x8) and 2 black screws B (T3x12) to remove the
duct top and duct bottom. Remove 1 screw C (T3x14) to remove the Wind Velocity
Sensor (S901).
2. Rotate the handle on the Filter and take off the Filter.
3. Remove 3 screws D (T3x10), 1 screw E(M3x6) and then take off the filter holder
upward. Remove 4 screws F(T3x8) to remove the motor and gear ass'y. Remove
the filter switch (SW903).
4. Remove the Sensor Board.Remove the moter sheet and remove 2 screws
G(M4x8) to remove the Motor (M901).
5. Remove 3 black screws H (T3x12) to remove fans (FN903,FN904,FN905).
Wind Velocity Sensor
(S901)
FN904
FN905
FN903
Duct bottom
Duct top
A (T3x8)x4
B (T3x12)
C (T3x14)
H (T3x12)x3
H
H
B
A A
E (M3x6)
SW903
Filter Holder
F (T3x8)X4
D (T3x10)X3
Handle
G (M4x8)x2
M901
Sensor Board
F
D
D
F
F
A
Filter Cartridge

-18-
Optical Parts Disassembly
Before taking this procedure, remove Cabinet Top and Main Board following to the “Mechanical Disassembly”.
Disassembly requires a 2.0mm hex wrench.
zProjection lens disassembly
(M2.5x8)x4
Fig.1
xIntegrator lens-in disassembly
Hooks
Integrator lens-in
Integrator Lens-In Ass'y
(M2.5x5)x2
Fig.2
* Rugged surface
(Behind)
Projection lens
Optical unit
Note: The optical unit should be removed from the cabinet bottom before removing the projection lens.

-19-
Optical Parts Disassembly
vPolarized glass-in disassembly
Polarized glass
Polarized glass-in Ass'y
(M2.5x5)x1
Fig.4
Film sheet
cRelay lens disassembly
Relay lens
Relay lens Ass'y
(M2.5x5)x2
Fig.3
Spring
* Mount the polarized
glass as the film at-
tached side faces the
prism side.
Hooks

-20-
Optical Parts Disassembly
LCD Panel/
Prism Ass’y
Fig.5-1
bLCD Panel/Prism Ass’y removal
(M2.5x4)x2
(M3x10)
(Bottom side)
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 points.
- Check that there is no color shading at the top, bottom, left or right of the screen. If there is, try to remove the
shading following to the chapter “Optical Adjustment”.
- Check the white balance. If it needs the adjustment, adjust the white balance following to the “White Balance
Adjustment” , “Gamma Adjustment” and “Common Center Adjustment” in the chapter “Electrical Adjustment”.
- Check the white uniformity on the screen.
If you find the color shading at the some part of the screen, it needs to take the color shading adjustment. This
adjustment should be performed by a computer and it also requires a special software “Color Shading Correc-
tion”. The software will be supplied separately and can be ordered as follows;
COLOR SHADING CORRECTION Ver. 4.00
Service Parts No. 645 075 9611