SANYO PLC-XF45 Service Manual

FILE NO.

SERVICE MANUAL

REFERENCE NO. SM5110433

PRODUCT CODE :

PLC-XF45 MW8A 1 122 15100

Multimedia Projector

Give complete “CHASSIS NO." for
parts order or servicing, it is shown on
the rating sheet on the cabinet of the
Projector.

Chassis No. MW8-XF4500

NOTE: Match the Chassis No. on the rating

sheet on the cabinet with the
Chassis No. in the Service Manual.

If the Original Version Service
Manual Chassis No. does not
match the unites, additional

Service Literature is required. You
must refer to “Notices” to the
Original Service Manual prior to
servicing the unit.

MODELNO. PLC-XF45

U.S.A., Canada, Europe, Asia, Africa, M.E., U.K.

CONTENTS ;

Specifications 2
Safety Instructions 3
Protections 4
Ass'y lamp replacement 6
Mechanical disassemblies 10
Optical unit disassemblies 15
Troubleshooting 26
Waveforms 40
Electrical adjustments 42
Optical adjustments 49
CPU input/output port functions 59

The cautions in schematic diagrams 63
Unit PFC, Unit lamp ballast and IC block diagrams 65

Parts list 70
Cabinet, Chassis and Optical parts list 78
Electrical parts list 79

Schematic diagrams S1~S11
Block diagrams B1~B2
PWB parts location diagrams P1~P6

(Projection lens is optional.)

-2-

Owner’s Manual
AC Power Cord
Wireless/Wired Remote Control Transmitter and Batteries
Remote Control Cable
VGA Cable and DVI Cable
MAC/VGAAdapter and DVI/VGA Adapter
3 Types Control Cable (For PS/2, Serial and ADB port)
6 Types Light-Block Sheet (For option lens)
Lens Mounting Parts
Protective Dust Cover

Accessories

1.8" TFTActive Matrix type, 3 panels

Multi-media Projector

81.7 lbs (37 kg)

22.9" x 10" x 30.9" (581 mm x 252 mm x 783 mm)

1024 x 768 dots
2,359,296(1024 x 768 x 3 panels)
PAL, SECAM, NTSC, NTSC4.43, PAL-M and PAL-N

Up, Down, Left and Right

800 TV lines

INT. SP. Stereo (R and L), 3 watt RMS (T.H.D. 10%)

41˚F ~ 95˚F (5˚C ~ 35˚C)
14 ˚F ~ 140 ˚F (-10 ˚C ~ 60 ˚C)

Projector Type

Net Weight

Dimensions

(W x H x D)

Panel Resolution
Number of Pixels
Color System

Scanning Frequency
Horizontal Resolution

Built-in Speakers

Operating Temperature
Storage Temperature

LCD Panel System

250 watt type x 4

Projection Lamp

0˚ to 5.7˚

Feet Adjustment

Power Source : AA, UM3 or R06 Type x 2
Operating Range : 16.4’ (5m) / ±30˚
Dimensions : 2.2” x 1.3” x 7.6” (55mm x 34mm x 192mm)
Net Weight : 0.36 lbs (165 g) (including batteries)
Laser Pointer : Class II Laser

(Max. Output : 1mW / Wave length : 650±20nm)

Remote Control Transmitter

480i, 480p, 575i, 575p, 720p, 1035i, 1080i-50 and 1080i-60

High Definition TV Signal

AC 120 V (12 A Max. Ampere), 50 / 60 Hz

(The U.S.A and Canada)

AC 200 ~ 240 V (7.5 A Max. Ampere), 50 / 60 Hz

(Continental Europe and The U.K.)

Voltage and
Power Consumption

H-sync. 15 ~ 120 KHz, V-sync. 50 ~ 120 Hz

Motorized Lens Shift

DVI-I Terminal (Digital/Analog), RCAType (Audio R and L)
and DIN 8-pin (Control port)

Input 1 Jacks

BNC Type x 5 (R/Pr, G/Y, B/Pb, H/HV and V), RCAType (Audio R and L)
and DIN 8-pin (Control port)

Input 2 Jacks

BNC Type x 2 (VIDEO/Y, C), RCAType (Audio R and L)
and DIN 4-pin (S-Video)

Input 3 Jacks

Serial port in (DB 9), Serial port out (DB 9), USB port,
Audio Monitor out (RCAType R and L) and Wired Remote Jack

Other Jacks

HDB 15-pin Terminal (Analog), RCA Type (Audio R and L)
and DIN 8-pin (Control port)

Input 4 Jacks

● Specifications are subject to change without notice.

● LCD panels are manufactured to the highest possible standards. At least 99.999% of the pixels are

effective, however a tiny fraction of the pixels (0.001% or less) may be ineffective by the characteristics of
the LCD panels.

TECHNICAL

SPECIFICATIONS

-3-

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 is 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 (20~25kV) 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.

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 personnel injury, servicing should be
made with qualified personnel.

The following precautions must be observed.

SAFETY PRECAUTIONS

1: An isolation transformer should be connected in the

power line between the projector and the AC line
before any service is performed on the projector.

2: Comply with all caution and safety-related notes

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, adjustment cov­ers or shields, barriers, etc.

DO NOT OPERATE THIS PROJECTOR WITHOUT
THE PROTECTIVE SHIELD IN POSITION AND
PROPERLY SECURED.

4: Before replacing the cabinet cover, thoroughly

inspect the inside of the cabinet to see that no stray
parts or tools have been left inside.

Before returning any projector to the customer, the
service personnel must be sure it is completely safe
to operate without danger of electric shock.

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 the 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.

LASER RADIATION
DO NOT STARE INTO BEAM

MAX. OUTPUT: 1mW
WAVE LENGTH: 650±20nm
CLASS II LASER PRODUCT

This product is complied with 21 CFR

part 1040.10

CAUTION

LASER RADIATION
DO NOT STARE INTO BEAM
CLASS 2 LASER PRODUCT
LASER-STRAHLING
NICHT IN DEN STRAHL BLICKEN
LASER KLASSE 2

IEC60825-1, Am. 1 1997
MAX OUTPUT ( ) : 1 mW
WAVE LENGTH ( ) : 650±20nm

!

Safety Instructions

CAUTION

RISK OF EXPLOSION IF BATTERY IS REPLACED

BY AN INCORRECT TYPE.

DISPOSE OF USED BATTERIES ACCORDING

TO THE INSTRUCTIONS.

-4-

This projector is equipped with the following protec­tions to operate in safety.

Protections

❏ Fuse for circuit protection

The fuse is located in the rear inside a projector. (Refer to figure.) When
either the LAMP indicator or the READY indicator is not illuminated,
fuse may be opened. Check the fuse as following steps.

1. Remove the Cabinet-top following to “Mechanical Disassemblies”.

2. Remove the fuse from fuse holder.

3. Check the resistance of fuse using a tester.
To install the fuse, take reversed step in the above.

It should be used the specified fuse as follows;

Fuse Part No.: 423 028 4209
TYPE 15.0A400V FUSE
SOC CORP. SHV14 15A N4

■ The Lamp circuit (the lamp and the electrode of the lamp socket)of this

projector is not insulated from AC line, and it is "HOT." Therefore,
when replacing lamp assembly, an electric shock may be received.
However, the interlock switch (SW902) is designed so that it may protect
from the accident.

■ This switch(SW902) insulates a lamp circuit from AC line, when cover -

top is opened. (The lamp circuit changes to "COLD.")

❏ Protection equipment for users Electric shock protection. (Interlock switch)

The label of the right figure sticks near the Fuse.

Lamp 1

Lamp 2

Lamp 3

Lamp 4

AC INPUT

Fuse
F901

Main sw
SW901

Interlock SW
SW902

Ass'y
Power

P.F.C.

P.F.C.

Lamp
ballast

Lamp
ballast

Interlock
switch

Cover top

Lamp socket

-5-

❏ Overheating Protection -- The temperature monitor system --

----- The temperature monitor -1: -----

■ To control the driving power of the cooling fans.

The CPU checks the temperature and atmospheric pressure
inside a projector. It checks a temperature using temperature
sensor-IC5801, IC2541 and it checks an atmospheric pressure
using pressure sensor-IC886.
The CPU controls the driving power of the cooling fans so the
temperature inside the projector is maintained to normal tem­perature.

■ To shut down the projector.

The CPU checks temperature of Blue polarization glass
(PTH901) and inhalation air(IC5801). If each part tempera­ture reaches to abnormal temperature, the CPU will turn off a
projector, and will blink TEMPERATURE WARNING indi­cator at intervals of 0.6 seconds. Cooling fans operate until
temperature returns to normal. Indicator will stop blink, if
temperature returns to normal.

The temperature monitor system is provided to prevents damage of optical components (the LCD panel and polarization
film etc.) inside a projector from overheat. Two protection systems are provided.
Each system operation as follows ;

----- The temperature monitor -2 : -----

(Temperature check of lamps. )

Temperature switches (SW 903~906) are arranged near the
four lamps. T emperature switches will operate, if temperature
reaches 100 degrees.
SW (903~906) ----- It operates at 100 degrees.

(Lamp-1~4)

When temperature switches have operated, lamp ballast units
will be shut down, then a projector will be turned off.

Note.

The CPU does not check operation of temperature switches.
Therefore, when temperature switches have operated and a
projector has shut down, TEMPERATURE-WARNING
indicator does not blink.

Check the following possible causes and wait until stopping the TEMP WARNING indicator flashing.

Possible causes

- Air filter is clogged with dust particles. Remove dust from the air filter by following instruction in the
"Air filter care and cleaning" below.

- Ventilation slots of the projector are blocked. In such an event, reposition the projector so that ventilation
slots are not obstructed.

- Check if projector is used at higher temperature place(Normal operate is 5 to 35°C or 41 to 95°F)

PRESSURE
SENSOR
IC886

PTH901

Temp. Sensor

(Blue polarization glass)

Front side

Temperature sensors
location

A

-Side

Blue polarizer unit

IC5801

Temp. Sensor

(I

nhalation air

906

W

S

100*C

p4

For

p3

For

Lam

Lam

p1

903

W

S

100*C

w

perature s

Tem

are arranged to B

Temp.
SENSOR
IC2541

p2

For

Lam

904

W

S

100*C

itches (SW

ottom

903/904/905/906)

of the optical unit.

905

SW

100*C

For

Lam

Main

B

-Side

)

This Projector is equipped with 4 Projection Lamps to ensure brighter image and those lamps are controlled by Lamp
Management Function. Lamp Management Function detects status of all lamps and shows status on screen or on LAMP
REPLACE indicator. This function also automatically controls Lamp Mode when any of lamps is out for end of life or
malfunctions.

Projection Lamp lights normally.

Lamp Replace Indicator

This LAMP REPLACE indicator lights yellow when any of Projection Lamps is nearing its end, and flashes when any of them
becomes out. Check number of lamp on Lamp Status Display and replace lamp.

Yellow Lamp

Dim Lamp

X Mark on Lamp

Red Lamp

LAMP REPLACE
INDICATOR

Projection Lamp is turned off.

Projection Lamp is nearing its end. When image becomes
darker or color becomes unnatural, replace lamp. (LAMP
REPLACE indicator lights yellow.)

(LAMP REPLACE indicator flashes yellow.)
Projection lamp is defective or fails to be turned on. Restart
a projector on, and make sure lamp is on. If this mark still
appears, replace lamp corresponding with number marked X.

LAMP STATUS
DISPLAY

1

4

3

2

Lamp Mode Changeover

Lamp Management Function automatically changes combination of lighting lamp (Lamp Mode) by detecting status of lamp.
When any of 4 lamps becomes out, Lamp Mode is changed over from 4 lamps to 2 lamps. And when any of 2 lamps are out,
a projector operates with 1 lamp. But, in case of combination that the Lamp of 1-4, or 2-3 does not light up, it becomes a 2
lamps mode.

Lamp Mode can be switched to 4 lamps or 2 lamps manually. Refer to SETTING section of Owner's manual

.

1

2 4

3

1

4

3

2

4 LAMP MODE

2 LAMP MODE
(Example)

1

4

3

2

2 LAMP MODE
(Example)

1

3

2

4

1 LAMP MODE
(Example)

Lamp Status Display

Lamp Status Display appears on screen when power switch is on or changed input position (input 1, input 2, Input 3 or input 4).
This shows status of each lamp as; ON, OFF, NEAR END, or OUT. Refer to following for each status.

30

LAMP STATUS

INPUT 1

1

2 4

3

LAMP REPLACEMENT

Before Replacement

-6-

-7-

LAMP REPLACEMENT

CAUTION

Do not drop a lamp assembly or touch a glass
bulb! Glass can shatter and may cause injury.

CAUTION

For continued safety, replace with a lamp
assembly of same type.
Allow a projector to cool for at least 45
minutes before you open Lamp Cover. Inside
of a projector can become very hot.

Check number of lamp to be replaced on Lamp Status Display.

Remove two screws on Lamp Cover and press button to open
Lamp Cover. (See right figure.)

1

3

Loosen two screws and pull out Lamp Assembly to be replaced
by grasping handle.

4

Turn off a projector and disconnect AC Power Cord. Allow a
projector to cool down for at least 45 minutes.

2

Replace Lamp Assembly with a new one and tighten two screws.
Make sure Lamp is set properly

6

Follow these steps to replace lamp assembly.

Replace Lamp Cover and tighten two screws.

5

7

8

Connect AC Power Cord to a projector and turn a projector on.

Reset Lamp Replacement Counter. (Refer to section "Lamp
Counter Reset".)

NOTE : Do not reset LAMP REPLACEMENT COUNTER when

lamp is not replaced.

BUTTON

SCREWS

LAMP
COVER

SCREWS

Make sure which number of lamp needs to be
replaced on Lamp Status Display.
Figure shows case of replacing LAMP 2.

LAMP 1

LAMP 2

LAMP 3

LAMP 4

CAUTION :Do not operate a Projector while any of lamps removed.

It may result in malfunctions, fire hazard, or other accidents.

NOTES ON LAMP REPLACEMENT

To maintain quality of picture (better balance of color and brightness in entire screen), we
recommend replacing all 4 lamps at a time.

CAUTION :High pressure lamp may explode if improperly handled.

Refer to lamp replacement instructions.

The label of the right figure sticks to here.

-8-

This projector uses a high-pressure lamp which must be handled carefully and properly. Improper
handling may result in accidents, injury, or create a fire hazard.

● Lamp lifetime may differ from lamp to lamp and according to the environment of use. There is no

guarantee of the same lifetime for each lamp. Some lamps may fail or terminate their lifetime in a
shorter period of time than other similar lamps.

● If the projector indicates that the lamp should be replaced, i.e., if the LAMP REPLACE INDICATOR

lights up, replace the lamp with a new one IMMEDIATELY after the projector has cooled down.
( Follow carefully the instructions in the LAMP REPLACEMENT section of this manual. ) Continuous
use of the lamp with the LAMP REPLACE INDICATOR lighted may increase the risk of lamp
explosion.

● A Lamp may explode as a result of vibration, shock or degradation as a result of hours of use as its

lifetime draws to an end. Risk of explosion may differ according to the environment or conditions in
which the projector and lamp are being used.

IF A LAMP EXPLODES, THE FOLLOWING SAFETY PRECAUTIONS SHOULD BE TAKEN.

If a lamp explodes, disconnect the projector’s AC plug from the AC outlet immediately. Contact an
authorized service station for a checkup of the unit and replacement of the lamp. Additionally, check
carefully to ensure that there are no broken shards or pieces of glass around the projector or coming out
from the cooling air circulation holes. Any broken shards found should be cleaned up carefully. No one
should check the inside of the projector except those who are authorized trained technicians and who are
familiar with projector service. Inappropriate attempts to service the unit by anyone, especially those who
are not appropriately trained to do so, may result in an accident or injury caused by pieces of broken
glass.

LAMP HANDLING PRECAUTIONS

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-LMP49

(Service Parts No. 610 300 0862)

Lamp replacement caution label

LAMP1

LAMP3

LAMP2

LAMP4

1AA6P4S2207-B

Lamp counter reset

Move pointer to Lamp counter reset and then
press SELECT button. Move arrow to

replaced lamp number (Lamp 1, Lamp
2, Lamp 3 or Lamp 4) and then press

SELECT button.

Be sure to reset Lamp Counter when Lamp Assembly is replaced. When Lamp Replace Counter is reset, LAMP
REPLACE indicator stops lighting.

Turn projector on, press MENU button and ON-SCREEN
MENU will appear. Press POINT LEFT/RIGHT button(s) to
move a red frame pointer to SETTING Menu icon.

1

Press POINT DOWN button to move a red frame pointer to
“Lamp counter reset” and then press

SELECT button.

2

Do not reset Lamp Replace Counter except after Projection lamp is
replaced.

Another confirmation dialog box appears and select [Yes] to
reset Lamp Replace Counter.

4

Move arrow to replaced lamp number (Lamp 1, Lamp 2, Lamp 3
or Lamp 4) and then press

SELECT button. Message "Lamp
replace counter Reset?" is displayed. Move pointer to [Yes] and
then press SELECT button.

3

NOTE: Be sure to reset correct lamp number otherwise LAMP

REPLACE indicator continues lighting.

Message "Lamp replace counter Reset?" is
displayed. Move pointer to [Yes] and then
press SELECT button.

-9-

LAMP1 LAMP3

LAMP4LAMP2

Lamp No. is marked a cabinet

CARRYING AND TRANSPORTING A PROJECTOR

●Do not drop or bump a projector, otherwise damages or malfunctions may result.

●When carrying a projector, use a suitable carrying case.

●Do not transport a projector by using a courier or transport service in an unsuitable transport

case. This may cause damage to a projector. To transport a projector through a courier or
transport service, consult your dealer and best case should be applied.

CAUTION IN CARRYING OR TRANSPORTING A PROJECTOR

LAMP1

LAMP3

3

1

2 4

LAMP2

LAMP4

Mechanical disassemblies

Remove 8 screws and remove the Cabinet -

top.

Note :

Be careful not to damage Hook.
The cabinet-front-top is being
fixed with cabinet-front-bottom by
hook.

1. Remove 2 screws-A. Push part(a) and pull
the Cabinet-front-top up.

2. Remove 4 screws-B and remove the Cabinet
front bottom.

3. Remove 11 screws-C and remove the
Cabinet front.

Refer to Lens replacement and installation
manual.

1.

Cabinet-front-top,

Cabinet-front-bottom

and Cabinet-front removal.

2.

Cabinet-top removal.

-10-

Disassemble should be made following procedures in numerical order.
Following steps show the basic procedures, therefore unnecessary step may be ignored.

Caution:

The parts and screws should be placed exactly the same position as the original otherwise it may cause lose of
performance and product safety.

C

Hook

A

C

C

Cabinet front top

C

(a)

C

C

C

B

B

B

B

A

(a)

Cabinet front

C

C

C

Cabinet front bottom

C

C

abinet top

-11-

MAIN

1. Remove the control-switch-unit upward.

2. Remove the Terminal-slots-unit upward.

Remove the connectors and the flexible
cables of the LCD panels from the assembly
Main. (Never touch the electrode of flexible

cables.)

Remove 6 screws and remove the assembly

main.

3.

Assembly Main removal.

4.

Control-switch-unit and
Terminal-slots-unit removal.

Mechanical disassemblies

Term

U

inal slots

nit

Control-SW

Unit

-12-

1. Remove 4 screws-A ,1 screw-B and remove the assembly motor & audio.
(Motor & audio unit and SW-power supply unit remove at the same time.)

2. Remove 4 screws-C and remove the assembly PFC3-4.

3. Remove 2 screws-D , 2 screws-E and remove the assembly power.

4. Remove 4 screws-F and remove the assembly PFC1-2.

5. Remove 2 screws-G , 1 screw-H and remove the assembly Lamp-ballast1-2.

6. Remove 2 screws-I , 1 screw-J and remove the assembly Lamp-ballast3-4

7. Remove 3 screws-K and remove the Fan(FN901).

8. Remove 4 screws-L and remove the assembly sub-power.

Note :

Mark the Fans as they are removed from the cabinet bottom so that
they may be reassembled in the same location from which they were
removed.
Be careful of the attachment direction of Fans.
See arrow mark in a figure.

5.

Assemblies PFC, assembly

power, assembly sub-power,
assemblies lamp-ballast , assem­bly Motor & Audio and
Fan(FN901) removal.

Mechanical disassemblies

C

C

L

C

C

The direction

of a wind.

(FN914)

L

L

L

Sub power

Moter & audio

(SW-Power supply)

PFC3-4

The direction

of a wind.

(FN907)

Lamp ballast 3-4
assembly

A

A

A

A

Ballast4

B

F

I

I

Ballast3

F

J

PFC1-2

K

K

K

F

The direction
of a wind.
(FN913)

E

D

Fan(FN901)

F

E

D

Power

G

Ballast2

Lamp ballast 1-2
assembly

G

H

The direction

of a wind.

(FN908)

Ballast1

-13-

Note:

When remove the Optical unit upward, do not

having projection lens.

Remove 10 screws-A, 4 screws-B and remove

the Optical unit upward.

6.

Optical unit removal.

Mechanical disassemblies

Note :

Mark the Fans as they are
removed from the cabinet bottom
so that they may be reassembled
in the same location from which
they were removed.
Be careful of the attachment
direction of Fan(FN906).
See arrow mark in a figure.

1. Remove 6 screws-A and remove the
adjustable-foot-left.

2. Remove 6 screws-B and remove the
adjustable-foot-right.

3. Remove 3 screws-C and remove the Fan

( FN903 ).

4. Remove 6 screws-D and remove the Fan
unit ( FN904 ,905, 916).

5. Remove 2 screws-E and remove the Fan

( FN906 ).

7.

Fans( FN903, FN904, FN905,
FN906, Fn916 ), and

Adjustable-feet removal.

A

A

A

A

A

A

A

A

A

A

B

B

B

B

Optical Unit

A

Adjustable

foot-left

D

D

D

D

A

A

A

C

C

C

D

D

FN904

FAN unit

FN916

A

A

FN903

Adjustable

foot-right

B

B

B

FN905

B

E

B

B

FN906

The direction

E

of a wind

1. Remove 2 screws-A, 2 screws­B and remove the Fan (FN909).

2. Remove 3 screws-C, 2 screws­D and remove the Fan (FN910).

3. Remove 4 screws-E and Main

switch unit.

-14-

Note :

Mark the Fans as they are
removed from the optical unit so
that they may be reassembled in
the same location from which
they were removed.

1. Remove 2 screws-A and remove the Fan
(FN911).

2. Remove 2 screws-B and remove the Fan

(FN912).

3. Remove 2 screws-C and remove the Fan

(FN915).

9.

Fans ( FN911, FN912 and
FN915 ) removal.

8.

Fans ( FN909, FN910 ) and
Switch assembly removal.

Mechanical disassemblies

t

A

A

C

C

C

B

FN909

B

E

D

FN910

D

E

E

E

MAIN-SW uni

FN911

B

B

A
A

FN912

FN915

C

C

-15-

Optical unit disassemblies

Note :

(1) Each polarizer unit uses different

characteristic polarization glasses.
Mark the polarizer units as they are
removed from the optical unit so
that they may be reassembled in
the same location from which they
were removed.

(2) Be careful of the attachment

direction of Fan (FN902).

See arrow mark in a figure.

1. Remove 2 screws A and remove the
Integrator lens in unit.

2. Remove 3 screws B and remove the
Integrator lens out / PBS unit.

3. Remove 2 screws C and remove the
Condenser lens unit.

4. Remove 2 screws D and remove the Relay
lens unit.

5. Remove 6 screws E and remove the 3
Polarizer units.

6. Remove 3 screws F and remove the
Fan(FN902) upward.

1. Slide the lens lock lever on the projector to
"UNLOCK" (UPPER) position and install
the Projection lens with Mount Parts to the
Holder lens unit.

(Refer to Lens replacement and Installation

procedures manual)

When making unlocking, add the hand so

as not the fall.

2. Loosen 4 screws-A and remove the

Projection lens.
For the loss prevention, the screw does not
come.

3. Remove 4 screws-B and remove the
Holder-lens unit.

1.

Projection lens and Holder-

lens unit removal.

2.

Integrator-lens-in unit,

Integrator-lens-out/PBS unit,
Condenser-lens unit, Relay-lens
unit, Polarizer units and
Fan(FN902) removal.

Lens lock lever
Unlock(upper)

position

Projevtion lens

A

A

A

A

Integrator-lens-out/
PBS unit

Lens mount

Fan(FN902)

Condenser-lens
unit

E

E

Holder lens unit

B

B

B

B

The direction
of a wind.

F

F

F

A

B

B

B

C

C

E

E

A

Integrator-lens-in
unit

Polarizer
unit

Red

Green

Blue

E

E

D

D

Relay-lens
unit

-16-

1. Remove 11 screws and remove the Optical
base top.

Note :

The characteristics and ages of
lamps are managed by CPU.
Mark the lamp assemblies as they
are removed from the optical unit
so that they may be reassembled
in the same location from which
they were removed.

Do not touch with bare hand in
the mirror.
Each mirror uses different charac­teristic optical filter glasses. Mark
the mirrors as they are removed
from the optical unit so that they
may be reassembled in the loca­tion and direction from which
they were removed.

1. Loosen 8 screws Aand remove the 4 Lamp
assemblies. (Two screws at each Lamp.)

2. Remove 5 stoppers and pull the 5 mirrors
upward.

3.

Assemblies lamps and mir­rors removal.

4.

Optical base top

removal.

Optical unit disassemblies

Lamp-3

Stopper-A

Dichroic Mirror(C)

Stopper-B

Mirror(R)

Mirror(B-cold)

Lamp-4

A

Stopper-B

A

A

A

A

Stopper-B

Dichroic Mirror(Y)

Stopper-B

Mirror(B-cold)

A

A

A

Lamp-1

Lamp-2

Optical base top

-17-

Note :

Mark the Fans as they are
removed from the cover mirror so
that they may be reassembled in
the same location from which
they were removed.

1. Remove 4 screws A and remove the cover
mirror.

2. Remove 8 screws B, plate and remove the
Fan(FN917, FN918, FN919, FN920 ).

(It hooks the plate to the cover mirror inside)

5.

Cover mirror and

Fan(FN917,918,919,920)

removal.

Cover mirror

Optical unit disassemblies

Note :

Each optical filter unit uses differ­ent characteristic optical filter
glasses. Mark the optical filter
units as they are removed from
the optical unit so that they may
be reassembled in the same loca­tion from which they were
removed

1. Remove 4 screws Aand remove the 2 mir­ror units.

2. Remove 8 screws B and remove the 4 opti­cal filter units.

6.

Optical filter units and
Mirror units removal.

Fan(FN920)

Fan(FN919)

BB

B

B

B

A

B

B

Fan(FN917)

A

A

B

Fan(FN918)

A

B

Optical-filter units

B

Mirror-units

B

B

A

A

B

A

A

B

B

B

Optical-filter units

-18-

7.

Prism/ LCD panel assembly removal

Note :
Prism / LCD panel assembly is a precision part.
be sure to handle this part with special attention.
Do not drop it or give it excessive force. It may
damage the parts and alignment.

Remove 4 screws and remove the Prism / LCD panel assembly.

At the time, be careful not to damage the Prism / LCD panel

assembly with the driver.

Caution :

(1). Never touch the LCD panel and prism

part directly with hand. Otherwise the
optical parts may get dirty.

(2). Since the LCD panel is equipped with

CMOS-LSI, pay attention to static elec­tricity.

And never touch the electrode of flexi-

ble cables.

Optical unit disassemblies

Never touch
the electrode of flexible cables.

Prism/LCD panel assembly

-19-

8.

LCD panel, Polarized glass, Optical filter removal.

Optical unit disassemblies

1. Remove 9 screws-A and remove the LCD panel . (3 screws per one LCD panel.)

2. Remove 3 screws-B and remove stoppers.

3. Remove polarized glasses,optical filteres upward.

Note: Each polarizer unit uses different characteristic polarization glasses. Mark the polarizer units as they are removed from the optical

unit so that they may be reassembled in the same location from which they were removed.

Caution :

(1). Never touch the LCD panel directly with hand. Otherwise the optical parts may get dirty.
(2). Since the LCD panel is equipped with CMOS-LSI, pay attention to static electricity.

And never touch the electrode of flexible cables.

Note :
Don't remove all three LCD panels at the same time. The standard in convergence
adjustment runs out and it becomes not possible to do an adjustment.
When exchanging three LCD panels at the same time, it recommends to exchange every
in the Prism/LCD panel assembly.

tical filter

p

O

A

Polarized glass(Hout)

A

Polarized glass(out)

A

LCD panel (Red)

Stopper

B

B

Stopper

B

Stopper

A

A

A

LCD panel (Green)

A

A

A

LCD panel (Blue)

-20-

101

PRISM ASSEMBL Y (PBS)

102

DICHROIC MIRROR (Y/IA)
103 DICHROIC MIRROR (C)
104 POLARIZED GLASS (IN/B)
105 POLARIZED GLASS (IN/G)
106 POLARIZED GLASS (IN/R)
107 POLARIZED GLASS (HIN/B)
108

POLARIZED GLASS (HIN/G)
109 POLARIZED GLASS (HIN/R)
110 OPTICALFILTER

111 OPTICAL FILTER
112 OPTICALFILTER (UV/IR)
113 OPTICALFILTER (UV cut )
114 MIRROR (B-COLD)
115 MIRROR (R)
116 MIRROR (COLD)
118 LENS-CONDENSER(OUT)
119 LENS-CONDENSER (IN)
120 LENS-RELAY (OUT)
121 LENS-RELAY (IN)
122 LENS-CONDENSER(G)
123

LENS-INTEGRATOR

124 PRISM ASSEMBLY

KEY No.

DESCRIPTION

Optical parts Location and direction

124-1
124-2
124-3
124-4
124-5
124-6

PRISM ASSEMBLY
OPTICAL FILTER (WV)
POLARIZED GLASS(HOUT/QU)
POLARIZED GLASS (OUT/R)
POLARIZED GLASS (OUT/G)
POLARIZED GLASS (OUT/B)

D

Integrator lens

The optical parts name (description)
can see it on parts-list.(page-78)

There is a directionality (the gradation) if installs the
Dichroic Mirror for the putting a marker comes always
to the position of the figure.

Lamp side

F

Optical filter (UV cut)

Without LCD Panel
in the figure.

No.123

No.113

106

A : The printed marker comes this side.

B : Plane surface comes this side.

C : Spherical surface comes this side.

D : Slot part comes this top side.
E : Glass shoud be placed as the film attached
side comes to the LCD panel side.

F : Big chamfer comes this top side.
G : The printed marker comes top side.

PRISM ASSEMBLY

124-1

105

124

122

109

118

115

108

103

B

Red

Green

Blue

104

121

107

114

120

124-4

124-3

124-3

124-6

124-2

124-2

G

(BLUE)

(RED)

G

124-5

124-3

G

124-2

(GREEN)

124

119

101

D

122

121
114

113

C

(Optical filter)

102

123

F

110

111

116

111
110
112

-21-

124-6

124-3

124-2

Blue

12

4

-2
1

2

4

-3
1

2

4

-4

Red

124-2

124-3

124-5

Green

Film side

Film side

A

F : Big chanfer comes this top side.

p

102

103

123

123

119

118

118

122 122

121

121

120

116

116

116

116

115

114

114

113

112

111

111

110

110

122

109

108

107

106

105

104

107 (B)

108 (G)

109 (R)

104 (B)

105 (G)

106 (R)

G:

Printed marker comes this top side.

(R,G)

52 (B)

Prism assembly (Without LCD Panel)

124

Film

side

F

ilm

s

id

e

F

101

G

G

G

(R,G)

68 (B)

Optical parts location --- The optical parts name(description) can see it on parts-list.

-22-

PWB assembles location

Motor fans location

Motor fans location

allast 4

B

AC net

3-4

PFC

ain

M

Front LED

otor & A

M

SW-Powr supply

udio

F-G

net

R

/C

1

allast 3

B

S

ensor

Lamp fannet

Fan

n

et1

Sub pow

other

M

G

C

Fan net 2

er

PFC

Pow

Terminal board

1-2

er

Lam

p net 1

R

/C

2

allast 2

B

allast 1

B

ear LED

R

trol

on

C

PWB assemblies
location

Front side

Front side

For Lamp ballast

FN914

For PFC3-4

FN903

For R-panel

FN908

FN919

FN904

N

et

For Lamp-3

FN909

FN920

FN902

For PBS

FN917

Fan net 3

For PBS

For Lamp-4

FN915

For B,G -panel

232C

S

R

FN912

FN918

FN910

For Lamp-1

FN901

For B-opt. filter

FN916

For Lamp-2

FN911

For Lamp ballat

Interlock SW

FN913

For PFC1-2

907

FN

SW902

For Exhaust

FN906

F901

Direction of a wind.

FN905

-23-

AIR FILTER

AIR INTAKE VENTS

This projector is equipped with cooling fans for protec­tion from overheating. Pay attention to following to
ensure proper ventilation and avoid a possible risk of
fire and malfunction.

-Do not cover vent slots.

-Keep bottom clear any objects.
Obstructions may block cooling air.

When Air filter cleaning, it clean the vent slots,too,at
the same time.

AIR INTAKE VENTS

MAINTENANCE

WARNING TEMP. INDICATOR

Ventilation Slots of a projector may be blocked. In such an event, reposition a projector so that Ventilation Slots are not
obstructed.

Air Filter may be clogged with dust particles. Clean Air Filter by following section AIR FILTER CARE AND CLEANING
on next page.

1
2

If WARNING TEMP. Indicator remains on after performing above checks, Cooling Fans or Internal Circuits may be
malfunctioning. Contact service personnel from an authorized dealer or a service station.

3

WARNING TEMP. Indicator flashes red and projector is automatically turned off when an internal temperature of a projector
exceeds normal temperature. Wait at least 5 minutes before turning on projector again.
When WARNING TEMP. Indicator continues to flash, check items listed below.

EXHAUST VENT

HOT AIR EXHAUSTED !

Air blown from exhaust vent is hot. When using
or installing a projector, following precautions
should be taken.

● Do not put a flammable object near this vent.

● Keep rear grills at least 3’ (1m) away from any

object, especially heat-sensitive object.

An exhaust is reflected and the cooling becomes
bad when there is any thing near the exhaust vents.
The heat causes temperature rise inside the
staying.

● Do not touch this area, especially screws and

metallic parts. This area will become hot while a
projector is used.

HOT

-24-

AIR FILTER CARE AND CLEANING

Air Filter prevents dust from accumulating on surface of Projection Lens and Projection Mirror. Should Air Filter
become clogged with dust particles, it will reduce Cooling Fans' effectiveness and may result in internal heat build up
and adversely affect life of a projector.
Clean Air Filter following steps below:

1

Turn power off, and disconnect AC power cord from AC
outlet.

2

Pull out air filter unit from a projector.

3

Pulling up center frame of air filter top, separate air filter
top and sheet from air filter base.

4

Clean each parts with brush or wash out dust and
particles.

Be sure to dry them out.

5

Assemble sheet and air filter and replace air filter to a
projector.

CAUTION

Do not operate a projector with air filter removed.
Dust may accumulate on LCD panel and Mirror
degrading picture quality.
Do not put small parts into air Intake Vents. It may
result in malfunction of a projector.

The filter be careful and handle. the effect of the
filter runs out in case of a leak and it being broken
off.

AIR FILTER UNIT

AIR FILTER TOP

AIR FILTER BASE

SHEET

Cleaning of the sheet

When Air filter cleaning, it clean the air intake
vents, at the same time.

-25-

Improvement of the Optical parts

1. When the garbage adheres to the surface basically about all optical parts,it is desirable to
clean in air spray and so on.

2. When the above way can not be removed,wipe the dry cleaning with wiping cloth
and the wiper there is little time dust and so on.

3. When the above way can not be removed,soak a few medicines in the cloth as follows and wipe
up them lightly. After that,always wipe the dry cleaning cloth.

Optical parts Medicines Remark

LCD panel

Iso-propyl-alcohol

In case of cleaning,pay attention
to the static electricity and specifical­ly,don't touch the terminal of FPC.

Polarized glass

(Glass with plastics sheet)

Methanol

Synthetic detergent

Iso-paraffin liquid

Wipe up lightly.
Because there is fear that the film
comes off the substrate when wiping
up by the strong power.

Dichroic mirror

Optical filter

(Glass with the surface coat)

Alcohol

(methanol:ethel=8:2)

Lens kind

Condenser lens

Integrator lens

Prism

Ethanol

The list of the medicine to recommend

Disassembly Cleaning

Disassembly cleaning method should only be performed when the unit is considerable
dirty and cannot be sufficiently cleaned by air spraying alone.

Be sure to readjust the optical system after performing disassembly cleaning.

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.

After long 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 other particles using air spray. If dirt cannot be removed by air spray, disassemble and clean the optical
unit.

Caution:

Use a commercial (inert gas) air spray designed for cleaning camera and computer equipment.
Use a resinbased 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.

-26-

CHECK

RGB SIGNAL

IC 501

IC 1501

DIGITAL SIGNAL

ANALOG SIGNAL

IC340 1
VIDEO
ENHAN CER

IC401
DIGITA L
GAMMA

BUFFE R
IC426 1/427 1
/4281

IC420 1
PROGR ESSIV E
SCAN
CONVE RTER

IC230 1
SW
FPGA

A/D
IC220 1

BUFFE R
IC201 /211
/221

BUFFE R
IC820 1 IC 8211
IC822 1

IC301
SCAN
CONVE RTER

IC240 1
CLOCK
CONVE RTER

DIGITA L
S&H

DIGITA L
S&H

DIGITA L
S&H

DIGITA L
S&H

DIGITA L
S&H

DIGITA L
S&H

IC440 1
GHOST
CANCE LER

CHECK

SYNC SIGNAL

Troubleshooting

NO PICTURE -1

TERMINAL BOARD DVI

DATA
R

G

B
H

V

AUDIO
INPUT

CONTROL
PORT

R

G

B

TERMINAL BOARD-COMPONENT

R/Pr
G/Y
B/Pb
H/HV

V

AUDIO
INPUT

CONTROL
PORT

R

G

B

INPUT-1

INPUT-2

INPUT-3

INPUT-4

CG MOTHER

SW- SYNC

HV

SW- R G B

SLOT SEL1
SLOT SEL2

Assembly Main

ANALOG

H
V

TP-32H1

TP-32V1

TP-HV

H
V

TP-V

H
V

IC8261

IC8251

DVI

BUFFER

BUFFER

IC8201 IC8211

IC8201 IC8211

IC8221

IC8221

DIGITAL SIGNAL

DIGITAL SIGNAL

TP-201

R

G

B

TP-211

TP-221

BUFFER

BUFFER

IC201/211

IC201/211

/221

/221

ANALOG SIGNAL

ANALOG SIGNAL

DIGITAL

H
V

V
H

H

TERMINAL BOARD AV

TERMINAL BOARD-D-SUB15

VIDEO-Y

S-VIDEO

VIDEO-C

AUDIO INPUT

R
G

B
H
V

I I C

AUDIO
INPUT

ANALOG RGB INPUT

CONTROL
PORT

R

G

B

R

G

B

The Terminal board D-SUB15 does
not exist in some particular models.

A/D

A/D

IC2201

IC2201

CLP

IC281

RS232C
SWITCH

USB

IC9801

FROM
IC2301

FROM
CPU

FROM
CPU

H

IC 501

IC 1501

IC340 1
VIDEO
ENHAN CER

IC401
DIGITA L
GAMMA

BUFFE R
IC426 1/427 1
/4281

IC420 1
PROGR ESSIV E
SCAN
CONVE RTER

IC230 1
SW
FPGA

IC301
SCAN
CONVE RTER

IC240 1
CLOCK
CONVE RTER

DIGITA L
S&H

DIGITA L
S&H

DIGITA L
S&H

DIGITA L
S&H

DIGITA L
S&H

DIGITA L
S&H

GREEN
LCD
PANEL

RED
LCD
PANEL

BLUE
LCD
PANEL

IC440 1
GHOST
CANCE LER

-27-

CHECK

RGB SIGNAL

CHECK

PSIG SIGNAL

CHECK

LCD PANEL

DRIVE

SIGNAL

VCO1
IC4231

H

IC4201

IC4201
PROGRESSIVE

V

V
H

IC2301

IC2301

SW

SW

FPGA

FPGA

H/V

PROGRESSIVE

SCAN

SCAN

CONVERTER

CONVERTER

H/V

IC3401

IC3401

VIDEO

VIDEO

ENHANCER

ENHANCER

IC2401

IC2401

CLOCK

CLOCK

CONVERTER

CONVERTER

VCO2
IC2403

NOTE:
IC4401 is used only for "UXGA" model.

H

SW
IC8253

GREF

RS232C

USB

Timing Chart

INPUT
SIGNAL

TP201
RED

IC6301

MEMORY

IC6321

SGRAM

IC6341
IC6361

H/V

SYSTEM BUS

H/V

IC4401

IC4401

GHOST

GHOST

CANCELER

CANCELER

CPU
IC801

I/O EXP.

GREF

BUFFER

BUFFER

BUFFER

IC4261/4271

IC4261/4271

/4281

/4281

IC301

IC301

SCAN

SCAN

CONVERTER

CONVERTER

H/V

IC401

IC401

DIGITAL

DIGITAL

GAMMA

GAMMA

FILP
FLOP

MEMORY

FLASH

MEMORY

SRAM

H/V

SYSTEM BUS

SYSTEM BUS

IC871

IC892

IC1311

IC1351

IC1352

IC1341

IC1331

MEMORY
EEP-ROM

MEMORY

FLASH

MEMORY

SRAM

OSC

OSC

TP2561
PSIG

IC2561
IC2571
IC2581

TP-2561

IC2591

PSIG

IC1501, IC1531 and IC1561
are used only for "UXGA" model.

DIGITAL

DIGITAL

S&H

S&H

DIGITAL

DIGITAL

S&H

S&H

DIGITAL

DIGITAL

S&H

S&H

DIGITAL

DIGITAL

S&H

S&H

DIGITAL

DIGITAL

S&H

S&H

DIGITAL

DIGITAL

S&H

S&H

BUFFER
IC406/407
/408

TTL

TTL-ECL
IC3351

DAC
IC3561

PSIG1~4

TO LCD
PANE L RGB

TP-2517

TP-2516

IC501

IC1501

TP-2527

IC531

TP-2526

IC1531

TP-2537

IC561

TP-2536

IC1561

TO LCD
PANEL RGB

Timing Chart

RED
TP2516
TP2517
S & H
OUTPUT

RED

RED

LCD

LCD

PANEL

PANEL

GREEN

GREEN

LCD

LCD

PANEL

PANEL

BLUE

BLUE

LCD

LCD

PANEL

PANEL

TP211
GREEN

TP221
BLUE

GREEN
TP2526
TP2527
S & H
OUTPUT

BLUE
TP2536
TP2537
S & H
OUTPUT

-28-

NO PICTURE -2

Troubleshooting

Check the terminal board-DVI.

Check the terminal board-COMPONENT.

Check the Vcc voltages.

S9V (Always)
9V / 5VB / -5V (Switched)

Check the test points.

Check the Vcc voltages.

S9V (Always)
9V / 5VB / -5V (Switched)

Check the test points.

DVI

K80A

DATA

D V I

R

G

B

H

V

K81A

AUDIO
INPUT

CONTROL
PORT

K81B

R
G
B

H
V

AUDIO L

AUDIO R

CONTROL

TP-80R
TP-80G

TP-80B

TP-80H
TP-80V

G-SYNC

H

V

H

Digital
Interface
IC8001

SYNC
SEP.
IC8201

AFC
IC8041

H_DIF
V_DIF
DE_DIF
CLK_DIF

H

V

SW

MOUSE

LATCH

I/OI/O
EXP.

DATA

CPU

I/O

I/O
EXP.

EXP.

EEP
ROM

H_DIF
V_DIF
DE_DIF
CLK_DIF

R

G

B

CS

VS

HS

2

I C

AUDIO L
AUDIO R

CONTROL

INPUT

R/Pr
G/Y
B/Pb
H/HV
V

AUDIO
INPUT

CONTROL
PORT

K10A

R

G

B

H

V

K10B

AUDIO R / L

CONTROL

K10C

ASSY COMPONENT

G-SYNC

H

V

B-Y Y R-Y

BUFFER

IC2001

SYNC
SEP.

IC1051

H

V

MOUSE

CONTROL

FILTER

30MHZ

AFC

IC1061

SW

IC2071

R

TP-2071
TP-2072

G

TP-2073

B

IC1052

IC1053

I/O

EXP.

AUDIO R / L

CONTROL

EEP
ROM

K10H

IIC

R
G

B

CS

HS

VS

-29-

Check the terminal board-AV .

Check the terminal board-DSUB15.

Check the Vcc voltages.

S9V (Always)
9V / 5VB / -5V (Switched)

Check the test points.

Check the Vcc voltages.

S9V (Always)

9V / 5VB / -5V (Switched)
Terminal board DSUB15 does not
exist in some particular models.

VIDEO-Y

S-VIDEO

VIDEO-C

AUDIO INPUT

K131

K131

K101

BNC-Y

K121

S-C

BNC-C

IC141B IC141C

S-Y

SW SW

TP-142

IC141A

SW

AUDIO R

AUDIO L

LPF

SYNC
SEP.

TP-141

C.V.

IC1191

NTSC

PAL

IC1141A

C.V.-C
Y/C-C

3D
Y/C

3LINE
COMB

SW

2

I C

C

NTSC-Y

PAL-Y

NTSC-C

PAL-C

LPF

BPF

IC1141B

SW

IC1141C

SW

TP-5102

TP-5101

LPF

LPF

YY

3D
NR

C

IC5101

Y/C-Y

C.V.-Y

Y/C-Y
NR-Y

NR-Y

NR-C

IC1181C

SW

IC1181B

SW

C.V.-C

IC2161B

IC1181A

SW

BNC-Y

SW

TP-3141

IC2161C

SW

Y/C-C

SW

IC2161A

TP-3142

Cb

YCbCr

Y

YCbCr
DEMOD
IC3141

C

IC2151

SW

DEMATRIX

Cr

IC401

SECAM

DECORDER

DAC

R
G
B

PAL SECAM

I/OI/O
EXP.

ASS'Y AV

BLK

DELAY

EEP

R
G
B

TP-5181
TP-5182
TP-5183

I C

AUDIO R
AUDIO L

R

G

B

2

Timing Chart

INPUT
K131

K71A

R
G
B
H
V

ANALOG_RGB INPUT

I I C

AUDIO
INPUT

CONTROL
PORT

SW

DDC

AUDIO R / L

K72A

CONTROL

K72B

IIC

G-SYNC
H

SYNC
SEP.

V

AFC

H

MOUSE
CONTROL

H

V

SW

I/O

EXP.

K71H

CS

VS

HS

EEP
ROM

AUDIO R / L

CONTROL

D-SUB15

TP5101
TP3141
C

TP5102
TP3142
Y

R

G

B

TP5181
RED

TP5182
GREEN

TP5183
BLUE

IIC

ASS'Y POWER

Hot circuit

AC-INPUT

CPU IC801
and
I / O
EXPANDER
IC1831

SUB POWER

System Control

INTERLOCK SW

FUSE

SW902

F901

DC out

WARNING
TEMP.

READY

POWER-ON/OFF

IIC-SCL & SDA

AC

DC out

I / O
EXPANDER

POWER
CONTROL

SWITCH

INDICATORS

FAN
ON/OFF

FANS

FANS

POWER FAILURE

CONTROL

LAMP
REPLACE

LAMP

Always

Switched

16V /9V /6.25V /-6V

-30-

* NO POWER -1

Troubleshooting

Isn't the lamp cover
of a projector
removed?

When it is removed, the
projector cannot be
turned on.

Is fuse (F901) blown?

Fuse may be opened
when either the LAMP
indicator or the READY
indicator isn't Illuminated.
Check the fuse.
For continued safety,
replace it with a new fuse
of the same type

Is the lamp cover attached
correctly? And has not the
boss(Inner side of the lamp
cover) broken?

Check the boss and the
Interlock switch (SW902).
SW902--open: Abnormality

Are the LAMP

indicator(red) and READY
indicator(green) light?

If the LAMP and READY
indicators are not illuminat­ed, check the primary cir­cuit and S5V of standby
power supply circuit.

Check that the
POWER FAIL sig­nals are correct.

L: Abnormality

Check that the
Vcc-voltages are
correct.

Check that the POWER

ON/OFF signal is correct.

L: Abnormality

Check that the Fan
on/off signal is cor­rect.

L: Abnormality

Check that the IIC
Bus signals for fan
control are correct.

Refer to next
page but one

Power sw
ON

Power on/off

Fan on/off

PFC on/off

Ballast on/off

400~600ms(Stability period of PFC.)

Power sw
OFF

Cooling time after power off.

Timing chart