Sanyo PLC-WM4500/L User manual

Multimedia Projector
SERVICE MANUAL
PRODUCT CODE
PLC-WM4500 PLC-WM4500L
1 122 517 00 (KP8A) 1 122 517 20 (KP8AL)
1 122 517 04 (KP8E) 1 122 517 24 (KP8EL)
1 122 518 00 (LP8A) 1 122 518 20 (LP8AL)
1 122 518 02 (LP8C) 1 122 518 22 (LP8CL)
1 122 518 03 (LP8D) 1 122 518 23 (LP8DL)
Original Version
REFERENCE NO. SM5111263-00
FILE NO.
Model No. PLC-WM4500L
PLC-WM4500
U.S.A, Canada,
Europe, U.K, Asia,
Brazil
PLC-WM4500L
* Projection lens is optional. Chassis No. KP8-WM4500L00
KP8-WM450000
Match the Chassis No. on the rating label of the projector
with the Chassis No. in the Service Manual.
If the Original Version Service Manual Chassis No. does
not match, additional Service Literature is required. You
must refer to “Notices” to the Original Service Manual prior
to servicing.

-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 (SW902) ...................................... 5
Mechanical sensor switches (SW901, SW1891)......... 6
Temperature sensors.................................................. 7
Power failure and fan lock detection........................... 8
Maintenance.................................................................. 9
Replacing the Filter Cartridge..................................... 9
Lamp Replacement ...................................................11
How to check Lamp Used Time ............................... 12
Quick maintenance................................................... 13
Lens Installation........................................................ 14
Using the Lens Antitheft screw................................. 15
Cleaning ................................................................... 16
Cleaning the Projection Lens ................................... 16
Cleaning the Projector Cabinet................................. 16
Security Function Notice ............................................. 17
Mechanical Disassembly............................................. 18
Optical Parts Disassembly .......................................... 27
Adjustments................................................................. 34
Adjustments after Parts Replacement...................... 34
Note on Main Board Replacement ........................... 34
Service Adjustment Menu Operation ....................... 35
Optical Adjustment ...................................................... 36
1. Optical axis adjustment ........................................ 37
2. Contrast adjustment ............................................. 41
Electrical Adjustments................................................. 42
Circuit Adjustments................................................... 42
Test Points and Locations ........................................ 46
Service Adjustment Data Table ................................ 47
Troubleshooting ........................................................... 64
Chassis over view..................................................... 64
No Power.................................................................. 65
No Power (Power supply) ......................................... 66
No Power (Power supply) ......................................... 67
No Power (Fan control)............................................. 68
No Power (Lamp control).......................................... 69
Temperature Abnormality ......................................... 70
No Picture................................................................. 71
No Sound.................................................................. 72
Motor control problems............................................. 73
Bus control................................................................ 74
LED drive & RC control ........................................... 75
Indicators and Projector Condition ........................... 76
Power failure detection system ................................ 79
Diagnosis of Power Failure with RS-232C port ........ 83
Serial Control Interface............................................. 84
Control Port Functions................................................. 86
IC Block Diagrams....................................................... 88
Parts Location Diagrams ............................................. 97
Mechanical Parts List ................................................ 106
Electrical Parts List.................................................... 108
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................. A15
Note on Soldering...................................................... A16

-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.

-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.
●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.
Mechanical Information
Projector Type Multi-media Projector
Dimensions (W x H x D) PLC-WM4500L : 19.25” x 6.46” x 14.61” (489.5 mm x 164.0 mm x 371.1 mm)
PLC-WM4500 : 19.25” x 6.46” x 17.12” (489.5 mm x 164.0 mm x 434.8 mm)
Net Weight PLC-WM4500L : 18.74 lbs (8.5kg)
PLC-WM4500 : 20.50 lbs (9.3 kg)
 FeetAdjustment 0˚to4˚
Panel Resolution
LCD Panel System 0.75” TFT Active Matrix type, 3 panels
Panel Resolution 1,280 x 800 dots
Number of Pixels 3,072,000 (1,280 x 800 x 3 panels)
Signal Compatibility
Color System PAL, SECAM, NTSC, NTSC4.43, PAL-M, and PAL-N
SD/HD TV Signal 480i, 480p, 575i, 575p, 720p, 1035i, 1080i and 1080p
Scanning Frequency H-sync. 15 kHz–100 kHz, V-sync. 48 Hz–100 Hz
Optical Information
Projection Image Size (Diagonal) Adjustable from 40” to 400” (PLC-WM4500)
Throw Distance 4.5' (1.4m) - 80.1' (24.4m) (PLC-WM4500)
Projection Lens F1.7–2.3 lens with f=26.9 mm–45.4 mm with motor zoom and focus
(PLC-WM4500)
Projection Lamp 275 W lamp
Interface
Input 1 HDMI/D-sub15pin(RGB, RGB Scart)
Input 2 BNC Type x 5 (G or Video/Y, B or Pb-Cb, R or Pr-Cr, H/HV and V)
Input 3 RCA Type x 3 (Video/Y, Pb/Cb,Pr/Cr), Mini DIN 4 pin x 1 (S-video)
Analog Out Analog RGB (Mini D-sub 15 pin) Terminal x 1
Audio Out Audio (Mini Type stereo) x 1
Audio In 1/2 Audio (Mini Type stereo) x 1
Audio In 3 RCA Type x 2
R/C Jack Mini jack (Wired Remote) x 1
Control Port D-sub 9 pin x 1
USB Connector USB Series B x 1
LAN Connection Terminal RJ45
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 (4.4A Max. Ampere), 50/60 Hz (The U.S.A and Canada)
AC 100–240 V (4.4-1.8A Max. Ampere), 50/60 Hz (For other countries)
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)
Accessories
Owner’s Manual (CD-ROM) Lens Cap (for PLC-WM4500)
Quick Reference Guide Lens Mount Cover (for PLC-WM4500L)
AC Power Cord Lens Antitheft screw *
Remote Control and Batteries VGA Cable
PIN Code Label

-5-
This projector provides 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.
Circuit Protections
Fuse
A fuse is located inside of the projector. When the POWER indicator is not
lighting, the fuse may be opened. Check the fuse as following steps.
The fuse should be used with the following type;
Fuse Part No. : 323 027 2605
TYPE T10AH 250V
LITTEL FUSE INC. TYPE 215010
How to replace the fuse
1. The fuse is placed on the power board under the main board. Remove
the cabinet top and exhaust fan assy.
2. Remove the fuse from fuse holder on the power board.
Thermal protector
(SW902)
Thermal protectors (SW902)
There are the thermal protector (SW902) inside of the projector to detect
the lamp surrounding temperature rising abnormally. When the temperature
reaches near 115˚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 temperature for about 45 minutes.
The thermal protectors will automatically reset when the internal temperature
becomes normal (less than 75 ˚C) .
F601
Fuse

-6-
Circuit Protections
Mechanical sensor switches (SW901, SW1891)
This projector provides 2 mechanical sensor switches, the one is for filter
switch (SW1891) and the other one is for lamp cover switch (SW901).
The filter switch detects whether the filter is installed correctly. If the filter isswitch detects whether the filter is installed correctly. If the filter isswitch detects whether the filter is installed correctly. If the filter is
not installed correctly, the projector cannot turn on. In this case, the LAMP
indicator is lighting and other indicators are blinking.
The lamp cover switch detects whether the lamp cover is closed securely. 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. In this
case, the LAMP indicator is lighting and LAMP REPLACE indicator is blink-
ing.
Filter switch
(SW1891)
Lamp cover switch
(SW901)
Filter
LED indicators

-7-
The projector provides 2 temperature sensor ICs and 1 thermistor on the intake duct. These devices are monitoring
the surrounding temperature of the lamp, panel and intake duct are monitoring airflow passed through the air filter in
the intake duct.
- Internal temperature sensor A (IC1692) (around the Intake duct)
- Internal temperature sensor B (IC1816) (around the lamp house)
- Internal temperature sensor C (IC1814) (around the panel/prism)
Circuit Protections
IC1814 on the
Sensor C Board
IC1692 on the
Sensor A Board
The projector is shut down and the WARNING TEMP. indicator
is blinking red.
When the temperature inside the projector reaches a certain level,
the WARNING TEMP. indicator starts blinking. If the temperature
rises moreover, the projector will be automatically shut down to pro-
tect the inside of the projector, and the WARNING TEMP indicator
is blinking fast and the POWER indicator is off. When the projector
has cooled down enough (to its normal operating temperature), the
POWER indicator lights on and it can be turned on again by press-
ing 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 projec-
tor is turned on again, the WARNING TEMP. indicator stops blinking.
POWER indicator
LED indicators
Temperature sensors
IC1816 on the Main
Board (behind)
WARNING TEMP.
indicator
Then check the matters below:
– Did you provide appropriate space for the projector to be ventilated?
Check the installing condition to see if the air vents of the projector
are not blocked.
– Has the projector been installed near an Air-Conditioning/ Heating
Duct or Vent? Move the installation of the projector away from the
duct or vent.
– Is the filter clean? Replace the filter with a new one.

-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 LAMP indicator is
lighting and other indicators are blinking.
When the projector detects an abnormal condition, it will be
automatically shut down to protect the inside of the projector
and the LAMP indicator lights on and other indicators blink
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 cannot be turned on and these indicators still light-
ing and blinking, it may operate the power failure protection
function.
Check that the filter cartridge is installed correctly.
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
LED indicators
LAMP indicator lights on
and other indicators
blink.

-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
Press ddownwards on the filter cover to release the
latch and open the filter cover.
3
Put the new one back into the position 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. See next page.
6
Replacing the Filter Cartridge
Pull out the filter cartridge. When taking out the filter
cartridge, put your finger on the filter cartridge’s tab and
then pull.
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-081
Service Parts No.: 610 349 8317
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 af-
fect the life of the projector.
If the projector reaches a time set in the timer setting, a Filter warning 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 as soon as possible.
Filter cover
Latch
Filter cartridge
Tab

-10-
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 ed buttons to select Setting
and then press the Point 8or the SELECT button.
Use the Point ed buttons to select Filter counter
and then press the SELECT button. Use the Point
ed buttons to select Filter counter reset and
press the SELECT button. Filter counter Reset?
appears. Select [Yes] to continue.
1
2
Another confirmation dialog box appears, select
[Yes] to reset the Filter counter.
3
Maintenance
Filter counter
Reset? appears.
Select Yes, then
another confirmation
box appears.
Select Yes again to
reset the Filter coun-
ter.

-11-
Maintenance
Lamp Replacement
When the projection lamp of the projector reaches its end of
life, the Lamp replacement icon appears on the screen and
LAMP REPLACE indicator lights. Replace the lamp with a
new one promptly. The timing when the LAMP REPLACE
indicator should light is depending on the lamp mode.
Follow these steps to replace the lamp.
Allow a projector to cool for at least 45 minutes before you
open the Lamp cover. The inside of the projector can be-
come very hot.
CAUTION
Lamp replacement icon
Top Panel
LAMP REPLACE indi-
cator
Note:
ñThe Lamp replacement icon will not appear when the
Display function is set to “Off”, or during “Freeze”.
Turn off the projector and unplug the AC power cord.
Let the projector cool for at least 45 minutes.
Loosen the screw and slide the lamp cover to open it.
Loosen 3 screws of the lamp and pull out the lamp by
using the built in handle.
Replace the lamp with a new one. Make sure that the
lamp is properly and fully inserted.
Close the lamp cover and secure the screw.
When replacing the lamp because it has stopped illuminat-
ing, there is a possibility that the lamp maybe broken. If re-
placing the lamp of a projector which has been installed on
the ceiling, you should always assume that the lamp is bro-
ken, 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 piec-
es of glass get into your eyes or mouth, seek medical advice
immediately.
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.
CAUTION
1
2
3
4
5
Lamp
Handle
Lamp cover
Screw
New Lamp
Screws
Model PLC-WM4500/PLC-WM4500L
Type No. POA-LMP137
Service Parts No. 610 347 5158
ORDER REPLACEMENT LAMP

-12-
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 1.5
Teco : used time in the Eco1 and Eco2 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 projector or ON button on the remote control for more than 20
seconds.
2The projector used time and lamp used time will be displayed on the screen briefly as follows.
Counter
Projector 500H
Lamp
Normal 200H
Eco 300H
Corresponding value 600H
Projector used time
How to check Lamp Used Time
Maintenance
Lamp Total lamp used time
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

-13-
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
B
E
E
DD
D
E
EE
E
Fig. 5
A
2
3
Loosen a screw-A on the lamp cover and slide it to
open (Fig. 1).
Loosen a screw-B on the prism cover and slide it in the
arrow direction (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 polarized
glass ass'y and take the polarized glass ass'y upward off
(Fig. 4/Fig. 5).
See chapter "Optical Parts Disassembly" for further
information of the optical parts disassembly.
1
4
5
Lamp cover
Fig. 1
Fig. 2
Fig. 3
Panel/Prism assy
Fig. 4
Polarized glass assy
Setting the Lamp Cover switch to "Service"
When aligning the optical parts with the lamp cover open,
the projector cannot be turned on because the lamp cover
switch is off. Insert the flat screw driver into the opening on
the switch and set the lamp cover switch to "service" position
as shown in the figure below.
After finishing the alignment, make sure that the lamp cover
switch is reset to its original position, and close the prism
cover and lamp cover securely.
Lamp cover switch
"Service" position

-14-
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

-15-
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 to
open (Fig. 1).
Loosen a screw-B on the prism cover and slide it in
the arrow direction (Fig. 2).
Insert the Lens antitheft screw onto the screw hole
on the cabinet top and turn it until the lens release
button is locked (Fig. 3).
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
2
Fig. 3
Lens Antitheft
screw
3
4
Note: Be careful not to drop the Lens Antitheft screw into
the opening of the projector when mounting the
screw.
Maintenance
Prism cover
B
A
Lamp cover
Fig. 1
Fig. 2
Lens release button

-16-
Cleaning
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.
Maintenance
Unplug the AC power cord before cleaning.
Gently wipe the projection lens with a cleaning cloth that contains a small
amount of non-abrasive camera lens cleaner, or use a lens cleaning paper
or commercially available air blower to clean the lens.
Avoid using an excessive amount of cleaner. Abrasive cleaners, solvents,
or other harsh chemicals might scratch the surface of the lens.
Unplug the AC power cord before cleaning.
Gently wipe the projector body with a soft dry cleaning cloth. When the
cabinet is heavily soiled, use a small amount of mild detergent and finish
with a soft dry cleaning cloth. Avoid using an excessive amount of cleaner.
Abrasive cleaners, solvents, or other harsh chemicals might scratch the
surface of the cabinet.
When the projector is not in use, put the projector in an appropriate carry-
ing case to protect from dust and scratches.
Cleaning with air spray
Remove the cabinet top following to “Mechanical Disassembly”. 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.
Disassembly Cleaning
Disassembly cleaning method should only be performed when the unit is considerable dirty and cannot be suffi-
ciently cleaned by air spraying alone.
Be sure to readjust the optical system after performing disassembly cleaning.
1. Remove the cabinet top and main units following to “Mechanical 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 extremely dirty areas using a cloth moistened with alcohol.
Caution:
The surface of the optical components consists of multiple dielectric layers with varying degrees of refraction.
Never use organic solvents (thinner, etc.) or any kind of cleanser on these components.
Since the LCD panel is equipped with an electronic circuit, never use any liquids (water, etc.) to clean the unit. Use
of liquid may cause the unit to malfunction.
Cleaning the Projector Cabinet
Cleaning the Projection Lens

-17-
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”

-18-
Mechanical disassembly flow chart
1. Lamp cover and Prism cover removal
2. Fan (FN905) and Main board removal
3. A/V board removal
4. ACC Sensor and Sensor C board re-
moval
6. Projection Lens removal
7. Optical Unit removal
8. Power Box and Thermal SW (SW902)
removal
9. Control board and Fans (FN902, FN903,
FN904) removal
7-1. Lens Shift assy removal
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, and the wiring method of the leads and ferrite cores
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
Mechanical Disassembly
5. Lamp, Lamp Cover and IC Connect
board removal
8-1. Power Box disassembly and Fan
(FN901) removal
10. Filter Assy removal
11. Fans (FN908, FN909, FN910) removal
12. Fans (FN906, FN907, FN911) and
Speaker removal
1-1. Cabinet top removal

-19-
Mechanical Disassembly
Mechanical disassembly
1. Lamp cover and Prism cover removal
1. Loosen 1 screw-A and remove the Lamp Cover upward off.
2. Loosen 1 screw-B and remove the Prism Cover by sliding it in the arrow
direction.
Filter Cartridge
T3x8
T3x8
Cabinet Top Assy
RC front
window
LED decoration
F/T RC+LED
board
Prism Cover
1-1. Cabinet Top removal
1. Open the Filter cover and remove the Filter Cartridge.
2. Remove 12 screws-A (M3x8) and then take the Cabinet Top Assy upward
off.
A
B
Lamp Cover
A
A
A
A
A
A
A
A
A
A
A
A
T3x8

-20-
Mechanical Disassembly
2. Fan (FN905) AND Main board removal
1. Remove 1 screw-A (M3x8) and 3 screws-B (T3x8) to take the Fan (FN905)
upward off.
2. Remove 10 sccrews-C(M3x8) to take the Main Board Shield Top off.
3. Remove 2 screws-D(M3x8) and 6 hex-screws E and 2 screws-F(M3x8)
and then remove the Main Board.
3. A/V board and removal
1. Remove 1 screw-A (M4x8) and pull the A/V Board Assy upward.
2. Remove 2 screws-B (T3x8) to take the Main Board Shield Bottom.
E
F
D
D
C
CC
C
C
C
C
C
Main Board
Main Board
Shield Top
BB
A
Fan (FN905)
Main Board Shield Bottom
A/V Board
AV Panel
C
C
A
B
B
B
F