Sanyo PLC-XTC50L User manual

Multimedia Projector
SERVICE MANUAL
PRODUCT CODE
1 122 431 20 (KH7AL)
1 122 432 20 (LH7AL)
1 122 432 22 (LH7CL)
Original Version
REFERENCE NO. SM5111028-00
FILE NO.
Model No. PLC-XTC50L
U.S.A, Canada,
Europe, U.K, Asia
* Projection lens is optional.
Chassis No. KH7-XTC50L00
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
Fuse............................................................................ 5
Thermal protectors (SW901, SW902) ........................ 5
Mechanical sensor switches (SW67A, SW7641)........ 6
Temperature sensors, wind sensors .......................... 7
Power failure and fan lock detection .......................... 8
Maintenance.................................................................. 9
Replacing the Filter Cartridge .................................... 9
Resetting the Filter Counter ..................................... 10
Resetting the Scroll Counter .................................... 10
Lamp Selection System............................................ 11
Lamp Replacement .................................................. 12
How to check Lamp Used Time ............................... 13
Warning Message on the non-standard lamp used . 13
Cleaning ................................................................... 14
Quick maintenance................................................... 15
Lens Installation ....................................................... 16
Using the Lens Antitheft screw................................. 17
Security Function Notice ............................................. 18
Mechanical Disassembly............................................. 19
Mechanical disassembly flow chart.......................... 19
Mechanical disassembly .......................................... 20
Optical Parts Disassembly .......................................... 34
Adjustments................................................................. 44
Adjustments after Parts Replacement...................... 44
Note on Main Board Replacement ........................... 44
Service Adjustment Menu Operation ....................... 45
Optical Adjustment ...................................................... 46
1. Optical axis adjustment ........................................ 47
2. Mirror adjustment ................................................. 50
3. Contrast adjustment ............................................. 51
Electrical Adjustments................................................. 52
Circuit Adjustments .................................................. 52
Test Points and Locations ........................................ 55
Service Adjustment Data Table................................ 56
Chassis Description .................................................... 73
Chassis over view..................................................... 73
Input & signal processing stage ............................... 74
Audio output stage ................................................... 75
Lamp control stage................................................... 76
Fan control stage...................................................... 77
Motor control stage................................................... 78
Bus control stage...................................................... 79
LED drive & RC control stage................................... 80
Power supply & power failure circuit......................... 81
Indicators and Projector Condition ........................... 82
Power failure detection system ................................ 85
Error information table .............................................. 85
Power failure detection tree...................................... 86
Sensor & detection switches .................................... 87
Error History Log ...................................................... 88
Diagnosis of Power Failure with RS-232C port ........ 89
Diagnosis procedure ................................................ 89
Serial Control Interface............................................. 90
Control Port Functions................................................. 92
System Control I/O Port Functions (PW392, IC301) 92
I/O Expander (TE7783, IC4801) .............................. 93
FPGA (XC3S50A, IC5201) ....................................... 94
IIC Bus D/A Converter (M62393FP Fan Control,
IC7971) ..................................................................... 94
Waveform .................................................................... 95
IC Block Diagrams....................................................... 96
Parts Location Diagrams........................................... 105
Mechanical Parts List .................................................116
Electrical Parts List.....................................................118
Diagrams & Drawings.................................................. A1
Parts description and reading in schematic diagram ..A2
Schematic Diagrams ...................................................A3
Printed Wiring Board Diagrams................................. A11
Pin description of diode, transistor and IC ................ A17
Note on Soldering...................................................... A18

-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 projec-
tor.
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 PR
OPERLY 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 control unit is harmful to the eyes.
If the remote control unit is failed, replace with new one.

-4-
Specifications
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.
Mechanical Information
Projector Type Multi-media Projector
Dimensions (W x H x D) 21.66” x 6.89” x. 17.76” (451.0 mm x 175.0 mm x 550.1 mm)
Net Weight 32.4 lbs (14.7 kg)
Feet Adjustment 0˚ to 3.5˚
Panel Resolution
LCD Panel System 1.0” 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 kHz–100 kHz, V-sync. 50 Hz–100 Hz
Optical Information
Projection Lens Optional
Projection Lamp 330 W NSHA(1 lamp + 1 lamp)
Interface
Input 1 Digital (DVI-D) x 1, Analog (Mini D-sub 15 pin) x 1
Input 2 BNC Type x 5 (G or Video/Y, B or Cb-Pb, R or Cr-Pr, HV and V)
Input 3 RCA Type x 1, Mini DIN 4 pin x 1
AUDIO IN Audio 1 (Mini Type stereo), Audio 2 (Mini Type stereo), Audio 3 (RCA Type) x 2
Analog Out Mini D-sub 15 pin x 1
Audio Out Audio (Mini Type stereo) x 1
R/C Jack Mini Type (Wired Remote) x 1
Control Port D-sub 9 pin x 1
USB Connector USB Series B x 1
Option PJ-Net Organizer Terminal x 1
Audio
Internal Audio Amp 3.0 W + 3.0W (stereo)
Built-in Speaker speaker, 1.97” x 3.54” (50 x 90 mm)
Power
Voltage and Power Consumption AC 100–120 V (4.6A Max. Ampere), 50/60 Hz (The U.S.A and Canada)
AC 200–240 V (2.3A Max. Ampere), 50/60 Hz (Continental Europe and The U.K.)
Operating Environment
Operating Temperature 41˚F–104˚F (5˚C–40˚C)
Storage Temperature 14˚F–140˚F (-10˚C–60˚C)
Remote Control
Battery AAA or LR03 Type x 2
Operating Range 16.4’ (5 m/±30˚)
Dimensions 1.8” (W) x 1.0” (H) x 5.7” (D) (45 mm x 25 mm x 145 mm)
Net Weight 3.5 oz (99 g) (including batteries)
Laser Pointer Class II Laser (Max. Output: 1 m W/Wave length: 640–660 nm)
Accessories
Owner’s Manual (CD-ROM), Quick Reference Guide, AC Power Cord, Remote Control and Batteries, VGA Cable, USB Cable
Lens Mount Cover, PIN Code Label, Lens Antitheft Screw *
●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.

-5-
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.
Circuit Protections
Fuse
A fuse 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. : 323 027 2605
TYPE T10AH 250V
LITTEL FUSE INC. TYPE 215010
How to replace the fuse
1. Turn the projector up and down.
2. Loosen a screw on the fuse cover and open it.
3. Remove the fuse from fuse holder on the AC filter board.
To install the fuse, take reversed step in the above.
Fuse
Screw
Thermal protector
(SW901)
Thermal protectors (SW901, SW902)
There are the thermal protectors (SW901, SW902) inside of
the projector to detect the internal temperature rising abnor-
mally. When the internal temperature reaches near 100˚C,
the thermal protector cuts off the current supplied to the
power supply circuit.
To reset the thermal protection function, disconnect the AC
cord and leave the projector at the normal surrounding tem-
perature for about 45 minutes. The thermal protectors will
automatically reset when the internal temperature becomes
normal.
Thermal protector
(SW902)

-6-
Circuit Protections
Mechanical sensor switches (SW67A, SW7641)
This projector provides 2 mechanical sensor switches, the one is for filter
cartridge sensor switch (SW7641) and the other one is for lamp cover sensor
switch (SW67A). The filter cartridge sensor switch detects whether the filter
cartridge is installed correctly. If the filter cartridge is not installed correctly,
the projector cannot turn on.
The lamp cover sensor switch detects whether the lamp cover is closed se-
curely. If lamp cover is opened or not closed completely, the drive signal to
the lamp circuit is cut off. After opening the lamp cover for replacing the lamp
ass’y, place the lamp cover correctly otherwise the projector cannot turn on.
Filter cartridge sensor
switch (SW7641)
Lamp cover sensor
switch (SW67A)
Filter cartridge

-7-
The projector provides 2 temperature sensor ICs, 1 thermistor, and 1 wind sensor on the intake duct. These devices
are monitoring the surrounding temperature of the lamp, panel and intake duct, and the wind sensor is monitoring
airflow passed through the air filter in the intake duct.
- Room temperature sensor A (TH901) (around the front cabinet)
- Internal temperature sensor B (IC8841) (around the lamp house)
- Internal temperature sensor C (IC8871) (around the panel/prism)
- Wind sensor D (S901) (intake duct)
Circuit Protections
IC8871 on the Panel
sensor board
TH901
Thermistor
The projector is shut down and the WARNING TEMP. in-
dicator is blinking red.
When the temperature inside the projector reaches a certain
level, the projector will be automatically shut down to protect
the inside of the projector. The POWER indicator is blinking
while the projector is being cooled down. When the projector
has cooled down enough (to its normal operating tempera-
ture), it can be turned on again by pressing the ON/STAND-
BY button.
✔Note:
• The WARNING TEMP. indicator continues to blink even after
the temperature inside the projector returns to normal. When
the projector is turned on again, the WARNING TEMP. indi-
cator stops blinking.
WARNING TEMP.
blinking red
LED indicators
Temperature sensors, wind sensors
IC8841 on the Main
board (behind)
S901
Wind Sensor

-8-
The projector provides the detection circuits of the power failure and the fan lock. When the detection circuit detects
an error at the power supply line or at the fan operation circuit, the projector will turn into the standby mode to protect
the other circuits defective.
Circuit Protections
The projector is shut down and the WARNING TEMP. in-
dicator lights red.
When the projector detects an abnormal condition, it will be
automatically shut down to protect the inside of the projector
and the WARNING TEMP. indicator lights red. In this case,
unplug the AC power cord and plug it, and then turn on the
projector once again to verify operation. If the projector can-
not be turned on and the WARNING TEMP. indicator still
lights red, it may operate the power failure protection func-
tion.
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.
Power failure and fan lock detection
WARNING TEMP.
lights red
LED indicators

-9-
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.
1
2
Slide and open the filter cover.
3
Put the new one back into the position until it clicks and
close the filter cover. Make sure that the filter cartridge
is properly and fully inserted.
5
CAUTION
Make sure the filter cartridge is inserted in the
projector. If the filter cartridge is not inserted, the
projector cannot be turned on. Make sure the filter
cover is closed when using the projector.
Do not put anything into the air vents. Doing so may
result in malfunction of the projector.
4
Reset the filter counter and the scroll counter.
6
Replacing the Filter Cartridge
Pull out the filter cartridge by holding the finger grip.
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 conditions,
dust may accumulate on a lens, liquid crystal panels, or op-
tical elements inside the projector. Such condition may de-
grade the quality of the projected image.
When the symptoms above are noticed, contact your autho-
rized dealer or service station for proper cleaning.
ORDER REPLACEMENT FILTER CARTRIDGE
Type No. POA-FIL-100
Service Parts No.: 610 342 9571
Connect the AC power cord to the projector and turn
on the projector.
7
Filter prevents dust from accumulating on the optical elements inside the projector. Should the filter becomes clogged
with dust particles, it will reduce cooling fans’ effectiveness and may result in internal heat buildup and adversely
affect the life of the projector. 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
when it detects the clogging.
If the projector detects that the filter is clogged and no scroll is left in the filter cartridge, a Filter cartridge replacement
icon appears on the screen and the WARNING FILTER indicator on the top panel lights up. When you see this icon,
replace the filter cartridge and reset the Filter counter and the Scroll counter.
Filter cover
Filter cartridge

-10-
Resetting the Scroll Counter
Scroll counter
Resetting the Filter Counter
Filter counter
Be sure to reset the Filter counter after replacing the filter
cartridge.
Press the MENU button to display the On-Screen Menu.
Use the Point 7 8 buttons to move the red frame point-
er to the Setting Menu icon.
Use the Point ed buttons to move the red frame point-
er to Filter counter and then press the SELECT button.
A dialog box appears showing the Used time option and
the Scrolls remaining option. Use the Point ed buttons
to select Used time.
1
2
Select Reset and the “Filter
counter Reset?” appears.
Select [Yes],
then another
confirmation
box appears.
Select [Yes] again to reset
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 option. Select
Reset and the “Filter counter Reset?” appears. Select
[Yes] to continue.
4
Select “Used time” and the dia-
logue box below appears.
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 7 8 buttons to move the red frame point-
er to the Setting Menu icon.
Use the Point ed buttons to move the red frame point-
er to Filter counter and then press the SELECT button.
A dialog box appears showing the Used time option and
the Scrolls remaining option. Use the Point ed buttons
to select Scroll(s) remaining.
1
2
Another confirmation dialog box appears, select [Yes]
to reset the Scroll counter.
3Scroll(s) remaining shows the number of the remain-
ing scrolls and the Reset option. Select Reset and the
“Scroll counter Reset?” appears. Select [Yes] to con-
tinue.
4
Select “Scrolls remaining” and
the dialogue box below appears.
Select Reset and the “Scroll
counter Reset?” appears.
Select [Yes],
then another
confirmation
box appears.
Select [Yes] again to reset
the Scroll counter.
Maintenance

-11-
Lamp Selection System
This Projector is equipped with 2 Projection Lamps. The Lamp Management Function detects the status of lamps
and shows the status on screen or on the LAMP 1/2 REPLACE indicators. This function also automatically controls
the Lamp Mode when any of lamps reaches the recommended total hours of use or is out for the end of life or mal-
functions.
Projection Lamp lights normally.
Lamp 1/2 Replace Indicators
The LAMP 1/2 REPLACE indicators light yellow when the total lighting time of a Projection Lamp reaches the rec-
ommended total hours of use. Check the number of lamp on the Lamp Status Display or the LAMP 1/2 REPLACE
indicators and replace the lamp.
Yellow Lamp
Dim Lamp
X Mark on Lamp
Red Lamp
LAMP 1/2 REPLACE
indicators
Projection Lamp is turned off.
The total lighting time of Projection Lamp reaches
the recommended total hours of use. (LAMP 1/2 RE-
PLACE indicator lights yellow.)
(LAMP 1/2 REPLACE indicator flashes yellow.)
Projection lamp is defective or fails to be turned on.
Restart the projector on, and make sure lamp is on.
If this mark still appears, replace lamp corresponding
with number marked X.
LAMP STATUS
DISPLAY
Lamp Mode Changeover
The Lamp Management Function automatically changes the lighting lamp (Lamp Mode) by detecting the status
of lamp. When either of the 2 lamps is out, the projector operates with the other lamp. The Lamp Mode can be
switched manually. Refer to the SETTING section on page 51.
LAMP 2 MODE
LAMP 1 MODE
When Lamp 2 is burnt out.
Lamp Status Display
The Lamp Status Display appears on screen when the projector is turned on or the input position (input 1, input 2, or
Input 3) is switched. This shows the status of each lamp as; ON, OFF, NEAR END, or OUT. Refer to the following
for each status.
Lamp status
When Lamp 1 is burnt out.
Lamp control
When the total lighting time of a lamp
reaches the recommended total hours
of use.
Red
Maintenance

-12-
Maintenance
Lamp Replacement
When the total lighting time of a Projection Lamp reaches the
recommended total hours of use, the Lamp replacement icon
appears on the screen and LAMP 1 / 2 REPLACE indicator
lights yellow. Replace the lamp with a new one promptly. The
timing when the LAMP 1 / 2 REPLACE indicator should light
is depending on the lamp mode.
Follow these steps to replace the lamp.
For continued safety, replace with a lamp of the same
type lamp. Do not drop the lamp or touch the 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
Turn off the projector and unplug the AC power cord.
Let the projector cool for at least 45 minutes.
Lift the lamp out of the projector by using the handle.
Replace the lamp with a new one. Make sure that the
lamp is set properly. Put the lamp cover back and se-
cure it with the screw.
Remove the screw that secures the lamp cover with a
coin, and then open the lamp cover.
CAUTION
Screw
Lamp replacement icon
Top Control
LAMP 1/2 REPLACE
indicators
Lamp cover
Note:
•The Lamp replacement icon will not appear
when the Display function is set to “Off”, or dur-
ing “Freeze”.
Check the number of lamp to be replaced on the Lamp
Status Display or the LAMP 1/2 REPLACE indicators
and replace the lamp.
Handle
Lamp 1
Lamp 2
When replacing the lamp because it has stopped illuminat-
ing, there is a possibility that the lamp maybe 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
Note:
• After lamp replacement, make sure to check the Lamp mode.
1
2
3
4
5
ORDER REPLACEMENT LAMP
Type No. POA-LMP125
Service Parts No.: 610 342 2626

-13-
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 below expression,
Total lamp used time (Corresponding value) = Teco + (Tnormal x 1.2) + (Thigh x 1.5)
Teco : used time in the Eco and Auto mode
Tnormal : used time in the Normal mode and Auto mode
Thigh : used time in the High mode and Auto 2 mode
You can check the lamp used time following to the below procedure.
1Press and hold the ON/STAND-BY button on the projector for more than 20 seconds.
2The projector used time and lamp used time will be displayed on the screen briefly as follows.
Counter
Projector 929 H
Lamp Lamp 1 Lamp 2
High 200 H 10 H
Normal 200 H 20 H
Eco 300 H 50 H
Corresponding value 840 H 89 H
Lamp 2 Total lamp used time
Projector used time
How to check Lamp Used Time
Maintenance
Lamp 1 Total lamp used time
Lamp
control Auto 1 Auto 2 High Normal Eco 1 Eco 2
High ✔ ✔
Normal ✔ ✔
Eco ✔ ✔
Lamp used time table in the Lamp control - Lamp mode
If the non-standard lamp is used, the warning and confirmation messages will appear on the screen every startup.
Some of the functions are limited when the non-standard lamp is used in spite of the warning.
Warning Message on the non-standard lamp used
Since the lamp is not standard,
projector failed to read lamp data.
Continue to use this lamp?
Yes
No

-14-
Cleaning
Cleaning with air spray
1. Remove the cabinet top following to “Mechanical Dis-
assembly”.
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 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.
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 Disassembly”.
2. Remove the optical base top following to “Optical
Unit Disassembly”. If the LCD panel needs cleaning,
remove the LCD panel unit following to “LCD panel
replacement”.
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.
Maintenance

-15-
This projector provides a cabinet prism cover on the cabinet top to enhance the service maintenance. This enables
service personnel to align the optical adjustment or replace the optical parts without disassembly the cabinet top.
Maintenance
Quick maintenance
Prism cover
Shutter assy
A
C
Fig. 3
Fig. 5
Panel/Prism assy
Fig. 1
Fig. 2
E
E
E E
E
E
D
DD
B
Fig. 4
Optical filter assy
2
3
Loosen a screw-A on the lamp cover and slide it
backward, and then loosen a screw-B on the prism
cover and turn it up in the arrow direction (Fig. 1).
Loosen a screw-C and take the shutter assembly
off (Fig. 2).
Loosen 3 screws-D and take the LCD Panel/Prism
ass'y upward off (Fig. 3/Fig. 5).
Remove 2 screws-E on each stopper of the optical
filter ass'y and take the optical filter ass'y upward off
(Fig. 4/Fig. 5).
See chapter "Optical Parts Disassembly" for fur-
ther information of the optical parts disassembly.
1
4

-16-
Maintenance
When replacing the lens or using an optional lens, install the lens by following the instructions below.
Remove the lens mount cover.
Fit the lens to the projector by aligning the red dot
on the lens with the red dot of the projector.
Slowly turn the lens clockwise until it clicks. Make
sure that the lens is fully inserted to the projector.
1
2
Attaching the lens to the projector
3
Red dots
CAUTION
Do not press the lens release button when at-
taching the lens.
Lens Installation
Shift the lens to the center position by using the
Lens shift function.
Turn off the projector and unplug the AC power
cord.
While pressing the Lens release button on the top
of the cabinet, turn the lens counterclockwise until
it stops and pull it out slowly from the projector.
1
2
Removing the lens Lens Release button
CAUTION
Be careful when handling the lens. Do not
drop.
3

-17-
Using the Lens Antitheft screw
This projector provides a Lens antitheft screw to protect the projection lens stolen from a suspicious person.
Mount the Lens antitheft screw by following the instructions below.
Loosen a screw-A on the lamp cover and slide it
backward, and then loosen a screw-B on the prism
cover and turn it up in the arrow direction (Fig. 1).
Insert the Lens antitheft screw onto the screw hole
on the cabinet top and turn it until the lens release
button is locked (Fig. 2).
Close the prism cover and tighten the screw-B, and
close the lamp cover and tighten the screw-A.
Check that the lens release button is locked to pro-
tect the projection lens removing.
1
Mounting the Lens antitheft screw
Prism cover
A
Fig. 1
B
2
Fig. 2
Lens Antitheft
screw
3
Lamp cover
4
Note: Be careful not to drop the Lens Antitheft screw
into the opening of the projector when mounting
the screw.
Maintenance

-18-
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.
Security Function Notice
Resetting procedure
1Disconnect the AC power cord from the AC outlet.
2As pressing the SELECT button, connect the AC power cord into an AC outlet again.
3Keep pressing the SELECT button and then press the ON/STAND-BY button.
4Release the ON/STAND-BY button first and then release the SELECT button.
- The PIN code lock and Logo PIN code lock will be 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 side control or the remote con-
trol.
If the Key lock is enabled with side control lock, the
projector 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 on the screen.
Initial code: “4321”

-19-
Mechanical disassembly flow chart
1-1 Cabinet top removal-1
2-1 Main board removal-1
3-1 Audio, Panel Temp, Rear junction, R/C
rear board removal
4-1 Filter box assy and Fans removal
6-1 Network joint board assy removal
7-1 Power board assy removal
8-1 Rear fans assy removal-1
9-1 Optical unit assy removal-1
1-2 Cabinet top removal-2
1-3 Prism cover remmovel
1-6 Control board removal
7-4 AC filter board removal
7-2 Relay board removal
8-2 Rear fans assy removal-2
9-2 Optical unit assy removal-2
Mechanical disassembly should be made by following procedures chart.
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.
The wiring method of the leads and ferrite cores should be returned exactly
the same state as the original, otherwise it may cause lose of performance
and product safety.
Screws Expression
(Type Diameter x Length) mm
T type M Type
Mechanical Disassembly
5-1 A/V board assy removal
7-3 Ballast board removal
1-4 Filter cover removal
2-2 Main board removal-2
9-3 Optical unit assy removal-3
9-4 Optical unit assy removal-4
10-1 Lens shift assy removal
11-1 Lens cover assy removal
12-1 Speakers removal
13-1 Fans and thermistor removal
1-5 Lamp cover removal

-20-
Mechanical Disassembly
Mechanical disassembly
1-2. Cabinet Top removal-2
1. Remove 9 screws-A (M3x8).
2. Loosen screw-B and open the lamp cover and remove 1 screw-C (M3x8),
and then take the Cabinet Top upward off.
1-1. Cabinet Top removal-1
1. While pressing the Lens release button on the top of the cabinet, turn the
lens counterclockwise until it stops and pull it out slowly from the projec-
tor.
2. Remove the terminal covers.
See the items "Lens installation" and "Using the Antitheft screw" in chapter
"Maintenance", for further information of the lens removing.
C
A
A
AA
A
A
A
A
Lens release
button
A
B
Lamp cover
Terminal
covers