promethean PRM-30A User manual

Multimedia ProjectorSERVICE MANUAL
Original Version
FILE NO.
Model No. PRM-30A
U.S.A, Canada,
Europe, U.K, Asia
Chassis No. KJ8-30A00
Match the Chassis No. on the rating label on the projector
with the Chassis No. in the Service Manual.
If the Original Version Service Manual Chassis No. does
not match the projector’s, additional Service Literature is
required. You must refer to “Notices” to the Original Ser-
vice Manual prior to servicing.
PRODUCT CODE
1 122 509 58 (KJ8YF) REFERENCE NO. SM5111346-00

-2-
Contents
SERVICE MANUAL ....................................................... 1
Multimedia Projector...................................................... 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
Fuse............................................................................ 5
Lamp cover switch ...................................................... 5
Warning temperature and power failure protection..... 6
Maintenance.................................................................. 7
Replacing the Filters................................................... 7
Resetting the Filter Counter........................................ 7
Lamp Replacement .................................................... 8
Resetting the Lamp Counter....................................... 9
How to check Lamp Used Time .................................. 9
Cleaning the Projector .............................................. 10
Cleaning the Projection Lens.................................... 10
Cleaning the Projector Cabinet................................. 10
Security Function Notice.............................................. 11
Standby Mode Notice .................................................. 12
Mechanical Disassembly ............................................. 13
Optical Parts Disassembly........................................... 19
mLocations and Directions...................................... 24
Adjustments................................................................. 25
Adjustments after Parts Replacement ...................... 25
Note on Main Board Replacement ........................... 25
Optical Adjustments..................................................... 26
Contrast adjustment.................................................. 26
Condenser lens (Out) adjustment............................. 27
Relay lens (Out) adjustment ..................................... 28
Electrical Adjustments ................................................. 29
Service Adjustment Menu Operation........................ 29
Circuit Adjustments................................................... 29
Test Points and Locations......................................... 33
Service Adjustment Data Table................................. 34
Chassis Block Diagrams.............................................. 48
Chassis over view..................................................... 48
System control.......................................................... 49
Power supply & protection circuit.............................. 50
Fan control circuit ..................................................... 51
Troubleshooting ........................................................... 52
Indicators and Projector Condition ........................... 52
No Power .................................................................. 53
No Picture................................................................. 54
No Sound.................................................................. 55
Control Port Functions................................................. 56
Scaler I/O Port Functions (PW190) .......................... 56
IC Block Diagrams....................................................... 57
Parts Location Diagrams ............................................. 61
Mechanical Parts List .................................................. 68
Electrical Parts List ...................................................... 69
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.................A11
Note on Soldering......................................................A12

-3-
Safety Instructions
Safety Precautions
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.
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.
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.

-4-
Specifications
This symbol on the nameplate means the product is Listed by Underwriters Labo-
ratories Inc. It is designed and manufactured to meet rigid U.L. safety standards
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) 16.93 x 5.69" x 15.04" ( 430 mm x 144.4 mm x 381.9 mm ) (Including Ceiling plate)
Net Weight 12.52 lbs (5.68kg) (Including Ceiling plate)
Panel Resolution
LCD Panel System 0.59" 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/HDTV Signal 480i, 480p, 575i, 575p, 720p, 1035i, and 1080i
Scanning Frequency H-sync. 15 kHz-100 kHz, V-sync. 50-100 Hz
Optical Information
Projection Image Size (Diagonal) Adjustable from 60” to 110”
Throw Distance 2.09’ - 3.93' (0.64 m - 119.7 cm)
Projection Lens F 1.8 lens with f 6.68 mm with manual focus
Projection Lamp 230W
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 / Component Input Terminal Analog RGB (Mini D-sub 15 pin) Terminal x 1
Computer Input 2 / Monitor Output Terminal Analog RGB (Mini D-sub 15 pin) Terminal x 1 (In/Out switchable)
Computer/ Component Audio Input Jack Mini Jack (stereo) x 1
Control port D-sub 9 pin x 1
Audio Output Jack Mini Jack (stereo) x 1 (variable)
LAN Connection Terminal RJ-45
HDMI x 1
Power
Voltage and Power Consumption AC 100–240 V (3.9 A - 2.2A Max. Ampere), 50/60 Hz
(Continental Europe, Mexico, Argentina, Korea, The U.K., Russia
Kazakhstan and Republic of South Africa)
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 AAA or LR03 1.5V ALKALINE TYPE x 2
Operating Range 16.4' (5 m)/±30˚
Dimensions 2.0" (W) x 0.7" (H) x 4.3" (D) (52 mm x 18 mm x 110 mm)
Net Weight 2.37 oz (67 g) (including batteries)

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Fuse
A fuse is located inside of the projector. When the POW-
ER indicator is not lighting, the fuse may be opened.
Check the fuse as following steps.
The fuse should be used with the type listed right;
How to replace the fuse
1. The fuse is placed on the filter board behind the main
board. Remove the cabinet top, terminal cover, AV
cover and main board.
2. Take the fuse off, and replace the new one with the
specified type.
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 projec-
tor to detect the internal temperature rising abnormally.
When the internal temperature reaches near 85˚C, the
thermal switch opens to stop the operation of the power
supply circuit.
The thermal switch can be reset itself automatically
when the internal temperature becomes normal.
When the internal temperature reaches near 55˚C, the
thermal switch returns automatically.
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)
Fuse
(F601)
Fuse Part No, : 423 034 4101
TYPE T6.3AH 250V FUSE
Hollyland Co, Ltd. TYPE 50CT063H
Fuse Part No.: 323 021 7804
TYPE T6.3AH 250V FUSE
LITTEL FUSE INC. TYPE 21506.3

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WARNING emit a
red light
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.
Warning temperature and power failure protection
The projector is shut down and the WARNING indicator lights red.
When the projector detects an abnormal condition, it is automatically shut down to protect the inside of the projector
and the WARNING indicator lights red. In this case, unplug the AC power cord and reconnect it, and then turn the
projector on once again to verify operation.
WARNING
DO NOT LEAVE THE PROJECTOR WITH THE AC POWER CORD CONNECTED UNDER AN
ABNORMAL CONDITION. IT MAY RESULT IN FIRE OR ELECTRIC SHOCK.
4Note:
- If the WARNING 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” and "Fan conrol circuit" in the Chassis
Block Diagram section.
When the temperature inside the projector reaches a certain level, the projector will be automatically shut down to
protect the inside of the projector and the WARNING and POWER indicators start blinking. When the projector has
cooled down enough (to its normal operating temperature), the POWER indicator stops blinking and lights red, The
projector can be turned on again by pressing the POWER button.
4Note:
The WARNING indicator continues to blink even after the temperature inside the projector returns to normal. When
the projector is turned on again, the WARNING indicator stops blinking.
Check items
- Remove dust around the air filter.
- 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 indicator is blinking red.
LED indicator

-7-
Maintenance
1
2
Filter prevents dust from accumulating on the optical elements inside the projector. Should the filter become
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. If a “Filter warning” icon appears on the screen, clean the filters immedi-
ately. Replace the filter by following the steps below.
3
5
CAUTION
Do not operate the projector with the filters re-
moved. Dust may accumulate on the optical ele-
ments degrading picture quality.
Do not put anything into the air vents. Doing so
may result in malfunction of the projector.
RECOMMENDATION
We recommend avoiding dusty/smoky environments when
you operate the projector. Usage in these environments may
cause poor image quality.
When using the projector under dusty or smoky conditions,
dust may accumulate on a lens, LCD panels, or optical ele-
ments inside the projector degrading the quality of a project-
ed image. When the symptoms above are noticed, contact
your authorized dealer or service station for proper clean-
ing.
Be sure to reset the Filter counter after replacing the filters.
Press the MENU button to display the On-Screen
Menu. Use the Point ed buttons to select Setting and
then press the Point 8or SELECT button.
Use the Point ed buttons to select Filter counter and
then press the Point 8or the SELECT button. Use the
Point ed buttons to select Filter counter reset and
then press the SELECT button. Filter counter Reset?
appears. Select Yes to continue.
1
2
Resetting the Filter Counter
Filter counter
Filter counter
Reset? appears.
Select Yes, then
another confirmation
box appears.
Select Yes again to
reset the Filter coun-
ter.
Another confirmation dialog box appears, select Yes to
reset the Filter counter.
3
Replacing the Filters
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.
Press 7leftwards on the filter cover to release the latch
and open the filter cover.
Pull out the filter. When taking out the filter, put your
fingers on the filter tab and then pull.
Put the new one back into the position and close the
filter cover. Make sure that the filter is properly and fully
inserted.
Connect the AC power cord to the projector and turn on
the projector.
Reset the filter counter.
4
6
7
Filter cover
Latch
Pull out and
remove.

-8-
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 yellow. Replace the
lamp with a new one promptly. The timing when the LAMP
REPLACE indicator should light is depending on the lamp
mode.
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
Follow these steps to replace the lamp.
Turn off the projector and unplug the AC power cord. Let
the projector cool for at least 45 minutes.
Loosen the three (3) screws that secure the lamp. Lift
the lamp out of the projector by using the handle.
1
3
Replace the lamp with a new one and secure the three
(3) screws. Make sure that the lamp is set properly.
Close the lamp cover and secure the screw.
4
Loosen the screw and open the lamp cover.
2
Connect the AC power cord to the projector and turn on
the projector.
6Reset the lamp counter.
See “Resetting the Lamp Counter” on the next page.
5
Lamp Cover
Screw
ORDER REPLACEMENT LAMP
Replacement lamp can be ordered through your dealer. When ordering a projection lamp, give the following
information to the dealer.
Replacement Lamp Type No. : POA-LMP140
Service Parts No. : 610 350 2892
Top Panel
When replacing the lamp because it has stopped illuminating, there is a possibility that the lamp may be bro-
ken. 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
Screws
Lamp
Handle
Lamp replacement icon
WARNING:
TURN OFF THE UV LAMP BEFORE
OPENING THE LAMP COVER
This indicator turns yellow
when the projection lamp
reaches the end of its life.
Note:
The Lamp replacement icon will not appear when the
Display function is set to Off, during Freeze, or No show.
Maintenance

-9-
How to check Lamp Used Time
The LAMP REPLACE indicator will light yellow when
the total lamp used time (Corresponding value) reaches
4,000 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 (Corresponding value)
= Tnormal + Thigh x 1.33
Tnormal : used time in the normal mode
Thigh : used time in the high mode
You can check the lamp used time following to the be-
low procedure.
1Press and hold the ON/STAND-BY button on the re-
mote 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
High 300 H
Normal 200 H
Corresponding value 600 H
Total lamp used time
Projector used time
Resetting the Lamp Counter
Lamp counter reset
Maintenance
Be sure to reset the Lamp counter after the lamp is replaced. When the Lamp counter is reset, the LAMP REPLACE
indicator stops lighting and the Lamp replacement icon disappears.
Note:
Do not reset the Lamp counter without implementing lamp
replacement. Be sure to reset the Lamp counter only after
replacing the lamp.
Lamp replacement counter
Reset? appears.
Select Yes, then another confir-
mation box appears.
Select Yes again to
reset the Lamp counter.
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 Lamp counter
and then press the SELECT button. Use the Point ed
buttons to select Lamp counter reset and then press
SELECT button. Lamp replacement counter Reset?
appears. Select Yes to continue.
1
2
Another confirmation dialog box appears, select Yes to
reset the Lamp counter.
3

-10-
Maintenance
Cleaning the Projector Cabinet
Cleaning the Projection Lens
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 avail-
able 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 sur-
face of the cabinet.
When the projector is not in use, put the projector in an ap-
propriate carrying case to protect it from dust and scratch-
es.
CAUTION
Do not use any flammable solvents or air sprays on the pro-
jector and in its vicinity. The explosion or fire hazard may
occur even after the AC power cord is unplugged because
the temperature inside the projector is extremely high due to
the lamps. In addition, there is a risk that the internal parts
may be damaged not only by the flammable air spray but
also by the cold air.
Cleaning the Projector

-11-
This projector provides security functions such as "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
Function Description
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”
Resetting procedure
1Turn the projector on (The PIN code entry window appears).
2Press and hold the 7and 8button on the remote control at the same time for more than 10 seconds. The PIN
code and Logo PIN code will be reset to the factory initial code. (There is no response for the resetting.)
3Enter the initial PIN code for the PIN code lock.
Please refer to the owner's manual for further information of the security functions.

-12-
This projector provides 2 types of standby mode, Eco standby and Network standby. According to the standby mode
"Eco" or "Network", several functions are restricted as shown in the table below. To change the standby mode, use
the projector's menu "Setting".
Network ............Supply the power to the network function even after turning off the projector. You can turn on /off
the projector via network, modify network environment, and receive an e-mail about projector status
while the projector is powered off.
Eco ...................Select "Eco" when you do not use the projector via network. The projector's network function will stop
when turning off the projector.
When "Eco" is selected, several functions will be restricted.
Restricted Function in the standby mode
Standby Mode Notice
Function Eco Network
Serial command control -- 4
Network Function -- 4
Monitor Out -- 4
Audio Out -- --
Direct On -- 4

-13-
zFilter Box and Terminal Cover removal
Mechanical Disassembly
Mechanical disassembly should be made following procedures in numerical
order.
Following steps show the basic procedures, therefore unnecessary step may
be ignored.
Caution:
The parts and screws should be placed exactly the same position as the origi-
nal otherwise it may cause loss of performance and product safety.
Screws Expression
(Type Diameter x Length) mm
T type M Type
Fig.1
1. Slide the Filter Cover in the arrow direction and remove it.
2. Pull out the Filter Box.
3. Remove 2 screws A (T3x10) and then press and hold 2
hooks B on the Terminal Cover and pull it to remove.
Filter Cover
A
A
Filter Box
Terminal Cover
Note:
Do not disassemble the filter box to clean up or replace the parts inside of the filter
box. When replacing the filter, replace whole the filter box with new one to maintain the
projector's performance.
B
Bottom view
B

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Mechanical Disassembly
1. Remove 5 screws A(M3x8) to remove the AV Panel.
2. Remove 3 screws B(T3x8), 1 screw C(T3x8), 2 screws D(M3x8) and 1 screw E(T3x8)
and 1 screw F(T3x8) to remove the Cabinet Top assy.
3. Loosen 1 screw G and remove the Lamp Cover in the arrow direction.
4. Remove 2 screws H(T3x8) to remove the Shield Plate.
Fig.2
xAV Panel and Cabinet Top removal
A
A
A
A
B
B
C
B
D
D
E
F
G
H
H
Lamp Cover Cabinet Top
Shield Plate
AV Panel
A
(Located on the center of
the cabinet bottom.)

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Mechanical Disassembly
1. Remove 2 screws A(M4x6), 2 screws B(T3x8), 2 screws C(M2.5x8) and remove the
Main Board upward.
2. Remove 2 screws D(M4x6) and 2 screws E(T3x8) and remove the Filter Shield top.
3. Remove 1 screw F(M3x6) and 2 screws G(T3x8) and remove the Filter Board upward
off.
4. Loosen 3 screws H and pull the Lamp upward off.
Fig.3
cMain, Filter Boards and Lamp removal
A
Main Board
Filter Board
A
B
C
CB
E
E
D
F
G G
Filter Shield
Lamp
H
Isolation Sheet

-16-
Mechanical Disassembly
vPower, Ballast Boards and Fans (FN906, FN907) removal
Fig.4
1. Remove 3 screws A(T3x8) to remove the Fans (FN906, FN907) Assy.
2. Remove 1 screw B(T3x8) to remove the Lamp Socket. Remove 3 screws C(T3x8) to
remove the Lamp Cover Bottom. Unhook the ballast cable from the cabinet bottom.
3. Remove 2 screws D(M4x6) and 3 screws E(T3x8). Disconnect the connectors "CN1" on
the Ballast Board and "K6C" on the Power Board. Remove the Power Box Top upward
off.
4. Remove 3 screws F(T3x8) to remove the Power Board.
A
Lamp Socket
AA
B
C C
DDE
E
E
F
F
Lamp Cover
Bottom
Power Board
Isolation Sheet
Power Box Top
FN906
FN907
Ballast Board
Isolation Sheet
F

-17-
Mechanical Disassembly
Duct Ass'y
A
B
C
Optical Unit
A
B
C
C
CC
DD
DDDD
D
D
Temp Sensor 1
Board
T3x8
SW901
Lamp Cover
Switch
T3x12
T3x30
T3x30 T3x30 T3x12
T3x12 T3x30
FN903
FN904 FN902 FN901
Holder
Panel Duct
Bottom
bOptical Unit and Duct Assembly removal
1. Remove 2 screws A(T3x8) to remove the Holder.
2. Remove 2 screws B(T3x12) and 5 screws C(T3x8) and remove the Optical
Unit upward off.
3. Remove 9 screws D(T3x8) and remove the Duct Ass'y upward off.
Fig.5
D

-18-
Mechanical Disassembly
nFan (FN905), SW902, Temp Sensor 3, R/C Front Board removal
1. Remove 2 screws A(T3x8) to remove the Duct Ass'y. Remove Fan (FN905) and
Temp Sensor 3 Board.
2. Remove 1 screw B(T3x8) to remove the Theamal Switch Holder and Thermal
Switch (SW902).
3. Remove 2 screws C(T3x8) to remove the Lens Holder. Pull the R/C Front Board
upward off.
A
A
BC
C
T3x30
T3x30
T3x8
Temp Sensor
3 Board
SW902
R/C Front Board
Lens Holder
FN905
SW902
Fig.6

-19-
Optical Parts Disassembly
Before taking this procedure, remove Terminal Cover, AV Panel, Cabinet Top and Main Board following to the “Me-
chanical Disassembly”.
Disassembly requires a 2.0mm hex wrench and a screwdriver.
zProjection lens removal
(M3x14)x2
Fig.1
xCondenser Out lens disassembly
Fig.2
Main Board Holder
Note: The Main Board Holder should be removed from the
cabinet bottom before removing the projection lens.
(T3x8)x2
PBS
marker
(M3x8)x4
Lens Ass'y
Lens Holder Top
(M2.5x6)x1
Projection Lens
PBS
Light Mask PBS
Integrator(Out)
Light Mask Int
Integrator(In)
* Rugged surface
is facing to PBS.
* Rugged sur-
face is facing
to the lamp.

-20-
Optical Parts Disassembly
cCondenser Lens Ass'y disassembly
Fig.3
vPolarized Glasses removal
(M2.5x6)x2
Condenser Lens(Out)
Polarized Glass(In/R)
Polarized Glass(In/G)
Polarized Glass(In/B)
(M2.5x6)x3
*Polarized glass is not re-
moved from the mounting
base.
Fig.4
(M2.5x6)