Sharp XGNV7XU Service Manual

XG-NV7XU

SERVICE MANUAL

S09P7XG-NV7XU

DLP PROJECTOR

MODEL

In the interests of user-safety (Required by safety regulations in some countries) the set should be restored
to its original condition and only parts identical to those specified should be used.

XG-NV7XU

CONTENTS

Page Page

• SPECIFICATIONS.............................................. 2

• IMPORTANT SERVICE SAFETY NOTES..........3

• NOTE TO SERVICE PERSONNEL....................4

• OPERATION MANUAL ...................................... 8

• REMOVING OF MAJOR PARTS ...................... 14

• RESETTING THE TOTAL LAMP TIMER .......... 19

• OPTICAL ADJUSTMENT................................. 20

• DMD AND PRINCIPLE OF

OPTICAL SYSTEM .......................................... 21

• ELECTRICAL ADJUSTMENT .......................... 24

• ADJUSTING THE PC INTERFACE .................. 30

• TROUBLE SHOOTING TABLE......................... 31

• CHASSIS LAYOUT........................................... 46

• BLOCK DIAGRAM ........................................... 48

• OVERALL WIRING DIAGRAM .........................50

• DESCRIPTION OF CONNECTOR................... 52

• DESCRIPTION OF SCHEMATIC DIAGRAM....53

• WAVEFORMS .................................................. 53

• SCHEMATIC DIAGRAM ................................... 54

• PRINTED WIRING BOARD ASSEMBLIES ....100

• PARTS LIST

Ë

ELECTRICAL PARTS ............................... 107

Ë

CABINET AND MECHANICAL PARTS.....126

Ë

ACCESSORIES PARTS ...........................132

Ë

PACKING PARTS...................................... 132

• PACKING OF THE SET..................................133

SHARP CORPORATION

DLP is the trademark of Texas Instruments, Inc., U.S.A

*

This document has been published to be used for
after sales service only.
The contents are subject to change without notice.

1

XG-NV7XU

Specifications

2

XG-NV7XU

2
2

IMPORTANT SERVICE SAFETY NOTES

Ë Service work should be performed only by qualified service technicians who are

thoroughly familiar with all safety checks and servicing guidelines as follows:

WARNING

1. For continued safety, no modification of any circuit
should be attempted.

2. Disconnect AC power before servicing.

BEFORE RETURNING THE PROJECTOR:
(Fire & Shock Hazard)

Before returning the projector to the user, perform
the following safety checks:

1. Inspect lead wires are not pinched between the
chassis and other metal parts of the projector.

2. Inspect all protective devices such as non-metallic
control knobs, insulating materials, cabinet backs,
adjustment and compartment covers or shields,
isolation resistor-capacity networks, mechanical
insulators, etc.

3. To be sure that no shock hazard exists, check for
current leakage in the following manner:

» Plug the AC cord directly into a 120-volt AC outlet,

(Do not use an isolation transformer for this test).

» Using two clip leads, connect a 1.5k ohm, 10 watt

resistor paralleled by a 0.15µF capacitor in parallel
between all exposed metal cabinet parts and earth
ground.

» Use an AC voltmeter with sensitivity of 5000 ohm per

volt., or higher , sensitivity to measure the AC voltage
drop across the resistor (See Diagram).

» All checks must be repeated with the AC plug

connection reversed. (If necessary, a non-polarized
adapter plug must be used only for the purpose of
completing these checks.)
Any reading of 0.3 volts RMS (this corresponds to

0.2 milliamp. A C.) or more is e xcessive and indicates
a potential shock hazard which must be corrected
before returning the unit to the owner.

AC

VOLTMETER

1.5k ohm (10W)

0.15µF

TEST PROBE

TO EXPOSED
METAL PARTS

CONNECT TO KNOWN
EARTH GROUND

234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121

SAFETY NOTICE

Many electrical and mechanical parts in DLP Projector
have special safety-related characteristics.
These characteristics are often not evident from visual
inspection, nor can protection afforded by them be
necessarily increased by using replacement components
rated for higher voltage, wattage, etc.
Replacement parts which have these special safety
characteristics are identified in this manual; electrical
components having such features are identified by “å”
and shaded areas in the Replacement Parts Lists and
Schematic Diagrams. For continued protection,
replacement parts must be identical to those used in the
original circuit. The use of a substitute replacement parts
which do not have the same safety characteristics as
the factory recommended replacement parts shown in
this service manual, may create shock, fire or other
hazards.

AVIS POUR LA SECURITE

De nombreuses pièces, électriques et mécaniques, dans
les projecteur à DLP présentent des caractéristiques
spéciales relatives à la sécurité, qui ne sont souvent
pas évidentes à vue.
Le degré de protection ne peut pas être nécessairement
augmentée en utilisant des pièces de remplacement
étalonnées pour haute tension, puissance, etc.
Les pièces de remplacement qui présentent ces
caractéristiques sont identifiées dans ce manuel;
les pièces électriques qui présentent ces particularités
sont identifiées par la marque “å” et hachurées dans la
liste des pièces de remplacement et les diagrammes
schématiques. Pour assurer la protection, ces pièces
doivent être identiques à celles utilisées dans le circuit
d’origine. L’utilisation de pièces qui n’ont pas les mêmes
caractéristiques que les pièces recommandées par
l’usine, indiquées dans ce manuel, peut provoquer des
électrocutions, incendies ou autres accidents.

WARNING: The bimetallic component has the primary

conductive side exposed. Be very careful in
handling this component when the power is on.

234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121

AVERTISSEMENT:La composante bimétallique dispose du

conducteur primaire dénudé. Faire
attention lors de la manipulation de cette
composante sous tension.

3

XG-NV7XU

NOTE TO SERVICE
PERSONNEL

UV-RADIATION PRECAUTION

The light source, metal halide lamp, in the DLP
projector emits small amounts of UV-Radiation.

AVOID DIRECT EYE AND SKIN EXPOSURE.

To ensure safety please adhere to the following:

1. Be sure to wear sun-glasses when servicing the
projector with the lamp
turned “on” and the top
enclosure removed.

2. Do not operate the lamp outside of the lamp housing.

NOTE POUR LE PERSONNEL
D’ENTRETIEN

PRECAUTION POUR LES RADIATIONS UV

La source de lumière, la lampe métal halide, dans le
projecteur DLP émet de petites quantités de radiation
UV.

EVITEZ TOUTE EXPOSITION DIRECTE
DES YEUX ET DE LA PEAU.

Pour votre sécurité, nous vous prions de respecter
les points suivants:

1. Toujours porter des lunettes de soleil lors d’un
entretien du projecteur
avec la lampe allumée
et le haut du coffret retiré.

2. Ne pas faire fonctionner la lampe à l’extérieur du
boîtier de lampe.

3. Do not operate for more than 2 hours with the
enclosure removed.

UV-Radiation and Medium Pressure
Lamp Precautions

1. Be sure to disconnect the AC plug when replacing
the lamp.

2. Allow one hour for the unit to cool down before
servicing.

3. Replace only with same type lamp. Type
CLMPF0078DE01 or BQC-XGNV7XU/1 rated 85V/
120W.

4. The lamp emits small amounts of UV-Radiation, a void
direct-eye contact.

5. The medium pressure lamp involves a risk of
explosion. Be sure to follow installation instructions
described below and handle the lamp with care.

3. Ne pas faire fonctionner plus de 2 heures avec le
coffret retiré.

Précautions pour les radiations UV
et la lampe moyenne pression

1. Toujours débrancher la fiche AC lors du
remplacement de la lampe.

2. Laisser l’unité refroidir pendant une heure avant de
procéder à l’entretien.

3. Ne remplacer qu’avec une lampe du même type.
Type CLMPF0078DE01 or BQC-XGNV7XU/1,
caractéristique 85V/120W.

4. La lampe émet de petites quantités de radiation UV­éviter tout contact direct avec les yeux.

5. La lampe moyenne pression implique un risque
d’explosion. Toujours suivre les instructions
d’installation décrites ci-dessous et manipuler la
lampe avec soin.

4

XG-NV7XU

5

4

5
5

234567890123456789012345678901212345678901234

UV-RADIATION PRECAUTION (Continued)

23456789012345678901234567890121234567890123

Lamp Replacement

Note:

Since the lamp reaches a very high temperature
during units operation replacement of the lamp
should be done at least one hour after the power
has been turned off. (to allow the lamp to cool off.)
Installing the new lamp, make sure not to touch the
lamp (bulb) replace the lamp by holding its reflector

2.
[Use original replacement only.]

Lamp

1

Reflector

2

DANGER ! –– Never turn the power on without the
lamp to avoid electric-shock or damage of the
devices since the stabilizer generates high voltages
at its start.

234567890123456789012345678901212345678901234

PRECAUTION POUR LES RADIATIONS UV (Suite)

234567890123456789012345678901212345678901234

Remplacement de la lampe

Remarque:

Comme la lampe devient très chaude pendant le
fonctionnement de l’unité, son remplacement ne doit
être effectué au moins une heure après avoir coupé
l’alimentation (pour permettre à la lampe de refroidir).
En installant la nouvelle lampe, s’assurer de ne pas
toucher la lampe (ampoule). Remplacer la lampe en
tenant son réflecteur 2.
[N’utiliser qu’un remplacement d’origine.]

1

Lampe

Reflecteur

2

DANGER ! –– Ne jamais mettre sous tension sans
la lampe pour éviter un choc électrique ou des
dommages des appareils car le stabilisateur génère
de hautes tensions à sa mise en route.

Since small amounts of UV-Radiation are emitted
from an opening between the duct cover and the
lamp housing, it is recommended to place the LENS
CAP on the opening during servicing to avoid eye
and skin exposure (Fig. 1).

Notes:

» The internal par ts of this model are cooled down

with the top panel tightly closed. If the power is
kept on for a long time with the top panel open, the
power may be turned off or the lamp may go out.
To avoid this during servicing, place the service
cover over the lamp and the cooling fan.

» Place the lens cap over the service cover.
» Please obtain a lens cap before servicing a model

XG-NV7XU that is received without one.

» The color wheel is running at high speed. Do not

touch it nor bring anything nearby.

COLOR WHEEL HOLE

Comme de petites quantités de radiation UV sont émises
par une ouverture entre le couvercle du conduit et le botier
de la lampe,il est recommandé de placer le CAPUCHON
D'OPTIQUE sur l'ouverture pendant l'entretien pour éviter
une exposition des yeux et la peau (Fig. 1).

Remarques:

» Les pièces internes de ce modèle sont refroidies av ec

le panneau supérieur hermétiquement fermé. S i
l'énergie électrique est maintenue pendant longtemps
avec le panneau supérieur laissé ouvert, l'énergie risque
de s'arrêter ou la lampe de s'éteindre. Pour éviter cela
lors d'un entretien, placer le couvercle de l'entretien sur
la lampe et le ventilateur de refoidissement.

» Placer le bouchon de l'objectif sur le couvercle de

l'entretien.

» Priére de se procurer un capuchon d'optique acant

d'entretien un modéle XG-NV7XU qui est livré sans.

» Le disque chromatique opère à une vitesse élevée. Ne

pas le toucher ni apporter quoi que ce soit à proximité.

CAPUCHON D'OPTIQUELENS CAP

ORIFCE DU DISQUE
CHROMATIQUE

SERVICE COVER

Figure 1. Figure 1.

(PCOVN0009CEKZ)

5

SERVICE COVER
(PCOVN0009CEKZ)

XG-NV7XU

Cautions Concerning the Laser Pointer

"COMPLIES WITH 21 CFR SUBCHAPTER J"

CAUTION

LASER RADIATION­DO NOT STARE INTO BEAM

WAVE LENGTH : 650nm
MAX. OUTPUT : 1mW

CLASS II LASER PRODUCT

SHARP ELECTRONICS CORPORATION
SHARP PLAZA, MAHWAH, NEW JERSEY 07430
TEL : 1-800-BE-SHARP

REMOTE CONTROL
MODEL NO. : RRMCG1530CESA
DC3V (1.5VX2PCS.)
MADE IN CHINA
FABRIQU AU CHINE

U.S.A. ONLY

AVOID EXPOSURE

LASER

-

RADIATION IS EMITTED
FROM THIS APERTURE.

Précautions Liées au pointeur laser

"COMPLIES WITH 21 CFR SUBCHAPTER J"

CAUTION

LASER RADIATION­DO NOT STARE INTO BEAM

WAVE LENGTH : 650nm
MAX. OUTPUT : 1mW

CLASS II LASER PRODUCT

AVOID EXPOSURE

SHARP ELECTRONICS CORPORATION
SHARP PLAZA, MAHWAH, NEW JERSEY 07430
TEL : 1-800-BE-SHARP

REMOTE CONTROL
MODEL NO. : RRMCG1530CESA
DC3V (1.5VX2PCS.)
MADE IN CHINA
FABRIQU AU CHINE

LASER

-

RADIATION IS EMITTED
FROM THIS APERTURE.

U.S.A. ONLY

6

XG-NV7XU

WARNING: High brightness light source. Do not stare into the beam of light, or view directly . Be especially

careful that children do not stare directly into the beam of light.

WARNING: To reduce the risk of fire or electric shock, do not expose this product to rain or moisture.

CAUTION

RISK OF ELECTRIC SHOCK.

DO NOT REMOVE SCREWS

EXCEPT SPECIFIED USER

SERVICE SCREW.

The lightning flash with arrowhead symbol,
within an equilateral triangle, is intended to
alert the user to the presence of uninsulated
“dangerous voltage” within the product’s
enclosure that may be of sufficient magnitude
to constitute a risk or electric shock to

CAUTION: TO REDUCE THE RISK OF ELECTRIC SHOCK,

DO NOT REMOVE COVER.

NO USER-SERVICEABLE PARTS EXCEPT LAMP UNIT.

REFER SERVICING TO QUALIFIED SERVICE

PERSONNEL.

persons.
The exclamation point within a triangle is

intended to alert the user to the presence of
important operating and maintenance
(servicing) instructions in the literature
accompanying the product.

CAUTION

(POWER Unit)

5A 250V

For continued
protection against
a risk of fire,
replace only with
same type and
rating of fuse.
(F1101)

CAUTION

(PC I/F Unit)

1.25A 125V

For continued
protection against
a risk of fire,
replace only with
same type

4511.25, Littelfuse

1.25A 125V.

CAUTION

(PC I/F Unit)

1.6A 125V

For continued
protection against
a risk of fire,
replace only with
same type

45101.6, Littelfuse

1.6A 125V.

A VERTISSEMENT: Source lumineuse de grande intensité. Ne pas fixer le faisceau lumineux ou le regar der

directement. V eiller particulièrement à éviter que les enfants ne fixent directement le
faisceau lumineux.

AVERTISSEMENT: Afin d’éviter tout risque d’incendie ou d’électrocution, ne pas exposer cet appareil à

la pluie ou à l’humidité.

ATTENTION

RISQUE

D’ELECTROCUTION. NE

PAS RETIRER LES VIS, A

L’EXCEPTION DES VIS DE

REPARATION UTILISATEUR

SPECIFIEES.

ATTENTION: POUR EVITER TOUT RISQUE

D’ELECTROCUTION, NE PAS RETIRER LE CAPOT.

AUCUNE DES PIECES INTERIEURES N’EST REPARABLE

PAR L’UTILISATEUR, A L’EXCEPTION DE L’UNITE DE LAMP.

POUR TOUTE REP ARATION, S’ADRESSER A UN

TECHNICIEN D’ENTRETIEN QUALIFIE.

PRECAUTION

(Unité d’alimentation)

5A 250V

Pour une protection
continue contre les
risques d’incendie,
ne remplacer
qu’avec un fusible
du même type.
(F1101)

PRECAUTION

(Unité d’interface PC)

1.25A 125V 1.6A 125V

Pour une protection
continue contre les
risques d’incendie,
ne remplacer
qu’avec un fusible
du même type

4511.25, miniature,

1.25A, 125V.

PRECAUTION

(Unité d’interface PC)

L’éclair terminé d’une flèche à l’intérieur
d’un triangle indique à l’utilisateur la
présence à l’intérieur de l’appareil d’une
«tension dangereuse» non isolée ayant
une amplitude suffisante pour provoquer
une électrocution.

Le point d’exclamation à l’intérieur d’un
triangle indique que des instructions de
fonctionnement et d’entretien importantes
sont détaillées dans les documents
fournis avec l’appareil.

Pour une protection
continue contre les
risques d’incendie,
ne remplacer
qu’avec un fusible
du même type

45101.6, miniature,

1.6A, 125V.

7

XG-NV7XU

Location of Controls

8

Operating the Wireless Mouse Remote Control

Remote Control

XG-NV7XU

Front View

MUTE button

POWER buttons

(ON/OFF)

KEYSTONE/BLACK

SCREEN button

RIGHT-CLICK/

ENTER button

FREEZE button

ADJUSTMENT

MOUSE/

switch

VOLUME buttons
(

/ )

LASER POINTER/
MENU button

MOUSE/
ADJUSTMENT
buttons

IrCOM buttonINPUT button

AUTO SYNC button

RESIZE buttonENLARGE button

GAMMA buttonTOOLS button

BACKLIGHT button

(///)

Rear View

LEFT-CLICK/
UNDO
button

T op View

Inserting the batteries

Press in and downward
on the arrow to remove
the battery cover.

Battery

cover

Remote control
signal transmitter

Laser
pointer
window

I

nsert two AA size batteries

213

for the remote control,
making sure their polarities
match the

and marks

inside the battery

Insert the side tabs of
the battery cover into
their slots and press the
cover in until it is
properly seated.

compartment.

Battery

Battery

compartment

cover

9

XG-NV7XU

Using the Remote Control as a Wireless Mouse

The remote control has the following three functions:

• Projector control

MOUSE/ADJUSTMENT switch

(Remote control)

• Wireless mouse

• Laser pointer

MOUSE

ADJ.

Wireless mouse

Laser pointer

MOUSE

ADJ.

Projector control

Remote Control/Mouse Receiver Positioning

• The remote control can be used to control the projector within the ranges shown below.

• The remote mouse receiver can be used with the remote control to control the mouse functions of a connected
computer within the ranges shown below.

• The signal from the remote control can be reflected off a screen for easy operation. However, the effective distance of the
signal may differ due to the screen material.

Controlling the Projector

Remote control

23 (7 m)

30˚

45˚

30˚

Using the Wireless Mouse

Remote control

30˚

30˚

120˚

45˚

30˚

Remote control

10

13(4 m)

Remote
mouse
receiver

Use as a Wireless Mouse

Be sure the supplied remote mouse receiver is connected to your computer.

MOUSE

ADJ.

Slide the MOUSE/ADJUSTMENT switch to MOUSE.

1

Effective buttons in MOUSE mode

BLACK SCREEN

XG-NV7XU

LASER
POINTER

MOUSE

RIGHT-CLICK

¥ The wireless mouse may not operate correctly if your computer serial port is not correctly set up. Refer

to the computers operation manual for details of setting up/installing the mouse driver.

¥ For one-button mouse systems, use either the LEFT-CLICK or RIGHT-CLICK button.

Using the remote control in a dark room

Press BACKLIGHT, and the buttons will light up. Gr een lights refer to mouse operations, and red
lights to projector adjustments.

Button name

LASER POINTER/MENU
BLACK SCREEN/KEYSTONE
RIGHT-CLICK/ENTER
MOUSE/ADJUSTMENT
LEFT-CLICK/UNDO
POWER ON/OFF
VOLUME
MUTE

/

Position of MOUSE/ADJUSTMENT switch

MOUSE

LASER POINTER (GREEN)
BLACK SCREEN (GREEN)
RIGHT-CLICK (GREEN)
MOUSE (NOT LIT)
LEFT-CLICK (NOT LIT)

Use as a Laser pointer

ADJ.

MENU (RED)
KEYSTONE (RED)
ENTER (RED)
ADJUSTMENT (NOT LIT)
UNDO (NOT LIT)

ON (RED)

LEFT-CLICK

Button name

INPUT
IrCOM
FREEZE
AUTO SYNC
ENLARGE
RESIZE
TOOLS
GAMMA

Position of MOUSE/ADJUSTMENT switch

MOUSE ADJ.

ON (RED)

1
2

MOUSE

ADJ.

Slide the MOUSE/ADJUSTMENT switch to MOUSE.

Press LASER POINTER (

) to activate the laser pointer.

When the button is released, the light automatically goes off.

¥ For safety, the laser pointer automatically goes off after 1 minute of continuous use. To turn it on,

release LASER POINTER (

) and press again.

11

XG-NV7XU

Connection Pin Assignments

12

Dimensions

XG-NV7XU

Rear View

Side View

(82 )

64

/

15

3

(37.5)

32

/

15

1

T op View

9 1/4 (235)

11

/32 (212)

8

(58)

32

/

9

2

(1.2)

64

/

3

(312.5)

64

/

19

12

(8.1)

16

/

5

Front View

(71.5 )

16

/

13

2

(219)

8

/

5

8

13

Bottom View

Units: inches (mm)

XG-NV7XU

REMOVING OF MAJOR PARTS

1.Removing the Lamp Unit

1-1. Remove the screw from the lamp cover and detach the lamp cover.
1-2. Remove the three screws from the lamp unit and take out the lamp unit.

Lamp Unit

Lamp Cover

1-2

1-1

14

XG-NV7XU

2.Removing the Top and Front Cabinets

2-1. Remove the two screws from the top and bottom cabinets.
2-2. Remove the three screws from the top and front cabinets.
2-3. Slowly lift the back of the top cabinet and disconnect the operation key unit connector (KY) and the speaker

connector (SP). Pull up and off the top cabinet.

2-4. Remove the two screws from the front cabinet and disconnect the remote control unit connector (RC). Unhook

the center of the front cabinet and take out the front cabinet.

2-1

2-2

Front Cabinet

Operation Key Unit

2-3

R/C Unit

(RC)

Top Cabinet

(KY)

(SP)

(SC)

(SP(P301))

Bottom Cabinet

15

2-4

XG-NV7XU

3-1

3.Removing the PWB Units

3-1. Remove the four screws from the output unit and disconnect the color wheel unit connector (J501).
3-2. Disconnect the output unit from the PC I/F unit connector. Tilt this unit toward the optical mechanism unit.
3-3. Remove the four screws from the main unit and detach the cooling fan (intake). Disconnect the S-out unit

connector (AU) and the temperature ensor connector (TI). Now take out the main unit.
3-4. Remove the two spacers, the screw and all the connectors from the S-out unit. Detach the S-out unit.
3-5. Remove the six spacers, the two screws and all the connectors from the PC I/F unit. Pull up and off the PC I/

F unit and the terminal unit together.
3-6. Detach the insulation barrier from the PC I/F unit.
3-7. Remove the four spacers and the two screws from the shielded board. Detach the shielded board.
3-8. Detach the insulation barrier from the power/ballast unit.

3-3

Cooling Fan (Intake)

3-5

Shield-1

Terminal Unit

3-7

Shield-2

Insulation Barrier

(AU)

Main Unit

(TI)

3-5

(P8503)

PC I/F Unit

3-5

3-4

(FE)

(AU)

(SP)

3-4

(FB)

(FA)

(FC)

S-Out Unit

(DB)

(PA)

(DC)

(RC)

(PB)

Insulation Barrier

3-7

Shield Board

Output Unit

3-8

3-2

(J501)

16

XG-NV7XU

4.Removing the Power/Ballast Unit

4-1. Remove the two lock screws off the Inlet Ass’y.
4-2. Remove the screw from the bimetal cover and detach this cover
4-3. Remove the two screws from the bimetal assembly and detach this assembly.
4-4. Remove the two screws from the AC power switch and detach this switch.
4-5. Remove the two spacers, the two screws and all the connectors from the power unit. Detach the power unit

and the insulation barrier.
4-6. Remove the screw from the lamp socket holder and detach the lamp socket.
4-7. Remove the four spacers from the ballast unit. Detach the ballast unit and the insulation barrier.

<DMD handling precautions>

Be very careful never to bend and twist the flexible cable.
To protect the parts from static electricity, be sure to wear an earth band when handling them.

4-1

Inlet Ass’y

Insulation Barrier
(Ballast Unit)

Lamp Socket

4-6

Socket Holder

4-7

Bimetal
Cover

Ballast Unit

AC Power

4-2

Switch

4-4

4-3

Bimetal
Ass’y

4-7

4-4

(CN105)

Power Unit

4-5

Insulation Barrier
(Power Unit)

(CN102)

4-5

(CN101)

17

XG-NV7XU

5.Removing the Optical Mechanism and Lamp Housing

5-1. Remove the two screws from the lamp housing and detach the housing.
5-2. Remove the four screws from the optical mechanism unit and detach this unit.
`: When removing these screws, be careful not to damage the capacitors nearby.

5-1

5-1

Color Wheel Unit

5-2

`

5-2

Output Unit

`

5-2

5-2

Optical Mechanism
Unit

18

Bottom Cabinet

XG-NV7XU

RESETTING THE T OTAL LAMP TIMER

When the lamp has been replaced, reset the total lamp timer in the following steps.
Resetting procedure

1. While holding down the “ENTER”, “ADJ."” and “ADJ.|” keys on the set at the same time, turn on the POWER

ON key.

2. Now the total lamp timer is reset to zero. “0000H” appears on the screen.

INPUT

FREEZE

UNDO

POWER

ON

OFF

LAMP

ENTER ADJ." ADJ.|

MUTE

MENULENS

ENTER

TEMP.

VOLUME

IrCOM

AUTO SYNC

RESIZEENLARGE

GAMMA

Lamp

The lamp in this projector operates for approximately 1,500 cumulative hours, depending on the usage environ­ment. It is recommended that the lamp be replaced after 1,400 cumulative hours of ues or when you notice a
significant deterioration of the picture and color quality. The lamp usage time can be checked with the On-screen
Display.

CAUTION

» Intense light hazard. Do not attempt to look into the aperture and lens while the projector is operating.
» As the usage environment can vary significantly, the projector lamp may not operate for 1,500 hours.

Maintenance Indicator

TEMPERATURE
WARNING indicator

The internal
temperature is
abnormally high.

Condition

Problem

· Blocked air intake.

· Cooling fan breakdown.

· Internal circuit failure.

· Relocate the projector to an area with

proper ventilation.

· Take the projector to your nearest Au­thorized Sharp Industrial DLP Products

Possible Solution

Dealer or Service Center for repair.

LAMP REPLACE­MENT indicator

The lamp does
not light up.

· Burnt-out lamp.

· Lamp circuit failure.

· Carefully replace the lamp.

· Take the projector to your nearest Au-

thorized Sharp Industrial DLP Products
Dealer or Service Center for repair.

19

XG-NV7XU

OPTICAL ADJUSTMENT

What to readjust after replacement

Readjustment
Reflection lens
Cylinder mirror
Mirror A
Mirror B
Requirements for adjustments
Color wheel

Not needed.
Not needed.
Not needed.
Not needed.
Phillips screwdriver, red gradation pattern signal.

Enter the red gradation pattern from RGB1. Make sure the pattern
appears normal on screen.
If not, loosen the wheel sensor screw and move the sensor up and
down until the gradation appears crisp on screen. (White lines and
magenta portions are not allowed.)

Adjustment after color wheel replacement

Lens

Color Wheel

Note: Never peel off the sensing seal and

balancer from around the motor.

Sensing Seal

Wheel Sensor Screw

Balancer

Normal Unacceptable

Black RedBlack

Gradation pattern

Red

White lines

RedRed

Magenta

20

DMD AND PRINCIPLE OF OPTICAL SYSTEM

1.Outline of DMD
(Digital Micro Mirror Device)

The DMD is one of the ultra-micro electromechanical
systems called MEMS (Microeletromechanical System).
The DMD can be fabricated by employing the existing

0.8 micron rule, which is the established semiconduc-

tor manufacturing technology.
The DMD is an optical switch of semiconductor chip
fabricated by connecting several hundred thousand to
one million and several hundred thousand mirrors
(16µm X 16µm in size) onto the CMOS SRAM
semiconductor memory and these mirrors rotate
mechanically when digital electric signal is received.
In the DMD, the mirror rotates at an angle of ±10
degrees by the action of electrostatic field produced by
voltage which is generated on the SRAM memory . The
rotation of this mirror changes the direction of reflected
light, the principle of which is applied for the optical
switch. The gray scale (or color gradation) of reflected
light is achieved by controlling the response time (or
ON-time) of the mirror with digital signal (8-bit pulse
width modulation [PWM] signal) (Processing with 10­bit PWM signal is now also available).
The gray scale has 256 tones. Hence, the total nµmber
of tones for RGB full primary colors counts as many as
256 X 256 X 256 = 16,700,000.

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2 3 4 5 6 7 8 9 10 11 12

About 500,000 micro mirrors are found at the
central white part.

Figure 1. DMD (SVGA Specification)

Mirrors (each one of squares).
Area of a mirror is 16 µm X 16 µm. The space
between adjacent mirrors is 1 µm.

Figure 2. Microscopic View of DMD

2.Structure of DMD Pixel

Figure 3.

The DMD monolithically consists of the four layers;
mirror, yoke and hinge, metal-3, and CMOS memory.
The mirror is made of 16 µm X 16 µm alµminµm plate.
The mirror is rigidly connected to the yoke below. The
yoke, in turn, is connected by two thin mechanically
compliant torsion hinges to the posts that are attached
to the PWB below . The address electrodes for the mirror
and yoke are connected to the complementary sides
of the PWB below . The yoke and mirror are connected
to the bias-reset bus formed on the metal-3 layer. The
bias-reset bus interconnects the yoke and mirrors of
each pixel to the bond pad around the chip.
When the digital signals [1] and [0] are written on the
CMOS SRAM, the mirror supported by the posts
inclines diagonally toward the PWB side. The angle of
inclination is ±10 degrees.

* DMD and DLP are the trademarks of Texas Instruments, Inc., U.S.A.

shows an exploded view of the DMD pixel.

Mirror

Landing Tip

Mirror

Address

Electrode

Yoke

Address

Electrode

Bias-Reset

Bus

Torsion Hinge

Yoke

Via 2 Contact
to CMOS

Landing
Site

Figure 3. DMD pixel exploded view

(Layers)

Mirror

Yoke
and Hinge

Metal-3

CMOS
Memory

21

XG-NV7XU

3.Switching of Mirror

The mirror reflects light in one of two directions,
depending of the state of underlying memory cell. The
mirror rotates by a force of electrostatic attraction
produced by voltage diff erence betw een the mirror and
the memory cell. With the memory cell being in the ON
(1) state, the mirror rotates by +10 degrees. With the
memory cell being in the OFF (0) state, the mirror rotates
by -10 degrees.
mirrors operating.

Mirror – 10 deg

Figure 5.

shows a close-up of DMD

Mirror + 10 deg

By combining the DMD with a suitable light source and
projection optics (

Figure 6.

), the mirror reflects incident
light either into or out of the center of the projection lens
by a simple beam steering technique. Thus , the (1) state
of the mirror appears bright and the (0) state of the mirror
appears dark.

Pixel
Image

Hing

Yoke

Landing Tip

Figure 4. Two DMD pixels

(mirrors are shown as transparent)

Figure 5. Images of operating DMD

CMOS

Substrate

+10°

Flat

–10°

40°

20°

Pixel

Mirror

Projection

Lens

Light From
Illuminator

20°

–10°

Flat

+10°

Figure 6. DMD optical switching principle

22

GRB

1

23

4

56

7

4.Digital Light Processing Signal and
Gray Scale

When the mirror rotates, it reflects incident light either
into or out of the projection lens to create a burst of
digital light pulses, which the eye interprets as an analog
image.
In binary pulse width modulation, the DMD accepts
electrical words representing the gray level of bright­ness at its input, and puts out optical words, which are
interpreted by the observer’s eye as analog brightness
level.
Taking 4-bit word as an example for simplicity, each bit
in the word represents a time duration for light to be ON
or OFF, and the time durations have relative value of
2°0, 211, 222 and 233 or 1, 2, 4 and 8 (
The video field time is divided into four time durations
of 1/15, 2/15, 4/15 and 8/15, and 24 or 16 equally spaced
gray le vels (0, 1/15, 2/15, 4/15, …, 15/15) are produced
by all the combinations of bits in the 4-bit word.
Currently available DLP systems are of either 24-bit color
(8 bits or 256 gray levels per RGB) or 39-bit color (10
bits or 1024 gray levels per RGB).
In the DLP displays of pulse width modulation, “bit­splitting technology” is combined to produce a “true­analog” sensation with greater accuracy and stability
than can be achieved by analog projection systems.

Projection Lens

Video Field TIme

(1111)
(1001)
(0100)
(0010)
(0001)
(0000)

(Note: For simplicity, only central colµmn is addressed

(4-Bit Example)

and no light source is shown.)

Figure 7. DMD binary pulsewidth modulation

(4bit example)

Figure 7.

(Sensation of Gray Scale

by Viewer’s Eye)

).

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Figure 7. Bloc k Diagram of Optical System Principle

Names of Parts and Operating
Specifications

1 Metal Halide Lamp

The DC light source lamp flickers 180 times or 210
times per second

2 RGB Color Filter (Color Wheel Unit)

This color filter splits light into RGB primary colors.
The rotation-detecting sensor should be synchro­nized with the timing to turn off the lamp at the seam
of color filter. The maximµm rotating speed is 7200
rpm.

3 Condenser Lens

This lens condenses the light split by the color filter
and projects it to the effective area of the reflection
mirror.

4 Reflection Mirror

This mirror reflects the light projected to the effective
area of the DMD.

5 DMD Chip

This chip turns on and off in proportion to each
color element per dot depending on the input source.

6 Projection Lens

This lens magnifies and projects the incident light
coming from the DMD.

7 Screen

Projected light (RGB components) is interpreted by
viewer’s eye as a synthesized color image due to
after-image phenomenon.
* On the main PWB, the color components are split

per dot depending on the input source, and the
information is sent to the DMD.

23

XG-NV7XU

ELECTRICAL ADJUSTMENT

Hook up a signal generator, or a DOSV or Mac personal computer to the projector in order to feed the
signals specified in the Adjusting conditions.

No. Adjusting point Adjusting conditions Adjusting procedure

1 EEPROM

initialization

1. Turn on the power (make
sure the lamp lights up) and
warm up the unit for 15 min­utes.

» Make the following settings:

Press S5001 to call up the process mode and
execute S2 in the SSS menu. Now the system,
with the PC board not included, is initialized. Do
not execute S1 because otherwise the PC board
will be initialized.
To adjust the PC board, follow the instruction in
"Adjusting the PC Interface". (See page 30)

2 RGB1 BRIGHT 1. Make the following choice.

Group : A/D
Subject : BRIGHT
Make sure the data value is

125.

2. Make the following choice.
Group : A/D
Subject : R-BRIGHT,

G-BRIGHT,

B-BRIGHT
Adjust until the data value
becomes 135 or so.

3 R drive 1. Make the following choice.

Group : A/D
Subject : GAIN

2. F eed the 100% red-only sig­nal. Make the following
choice.
Group : A/D
Subject : R-D

» With the set's control switch or the remote-control

button, adjust the data until the black-side noise
becomes bitless.

» Using the control switches or the remote controller

buttons, adjust the data so that the signal be­comes bit-less (noise).

4 B drive 1. Feed the 100% blue-only

signal. Make the following
choice.
Group : A/D
Subject : B-D

5 G drive 1. Feed the 100% green-only

signal. Make the following
choice.
Group : A/D
Subject : G-D

» Using the control switches or the remote controller

buttons, adjust the data so that the signal be­comes bit-less (noise).

» Using the control switches or the remote controller

buttons, adjust the data so that the signal be­comes bit-less (noise).

24

No. Adjusting point Adjusting conditions Adjusting procedure

XG-NV7XU

6 Gain adjustment 1. Make the following choice.

Group : A/D
Subject : GAIN
Initial value : 137

7 RGB gradation

regeneration
adjustment

1. Feed the green-only SMPTE
pattern signal.(XGA)
Group : A/D
Subject : GAIN

8 RGB white

balance

1. Feed the 32-step gray scale
signal (XGA 60Hz).
Group : A/D
Subject : R-BRIGHT

B-BRIGHT

» With the set's control switch or the remote-control

button, adjust the data until the white-side noise
becomes bitless.

» Adjust the G-GAIN data until the gradation of the

portion 1 (95% and 100% white) shown below
can be slightly recognized. Make sure also that
the gradation of the portion 2 (0% and 5% black)
is visible.

2

1

» Adjust the R-BRIGHT and B-BRIGHT data for the

balance on the gray scale.
(Adjust to the best point.)

9 Horizontal

center

10 Video picture

adjustment

1. Feed the NTSC mono­scope pattern signal.

2. Group : VIDEO 2
Subject : N358-DLY (10)

N443-DLY (0)
PAL-DLY (10)
SECAM-DLY (10)

Make sure the settings are

as above.

3. Group : VIDEO 1
Subject : NTSC-H

1. Feed the split color bar sig­nal.
Group : VIDEO 1
Subject : PICTURE

2. Connect the oscilloscope to
TP805.

» Using the control switches or the remote controller

buttons, adjust the data to have the same
overscan.

» Using the control switches or the remote controller

buttons, adjust the black-to-white (100%) level
difference to 2.1 ±0.02 Vp-p.

100% White

2.1Vp-p

25

XG-NV7XU

100% White Red

No. Adjusting point Adjusting conditions Adjusting procedure

11 Video AGC 1. Feed the split color bar sig-

nal.
Group : VIDEO 1
Subject : AGC

2. Connect the oscilloscope to
TP805.

12 Video

brightness
adjustment

1. Feed the baseband (split
color bar) signal.
Group : VIDEO 1
Subject : BRIGHT

2. Press the control switch or
the remote control’s mute
button (to set the gamma
correction to the process
setting).

» Using the control switches or the remote controller

buttons, adjust the black-to-white (100%) level
difference to 1.65 ±0.02 Vp-p.

100% White

1.65Vp-p

» Using the control switches or the remote controller

buttons, adjust the setting until the black signal
becomes bit-less and set to -3 point of value.

13 Tint 1. Feed the split color bar sig-

nal.
Group : VIDEO 1
Subject : TINT

2. Connect the oscilloscope to
TP807.

14 NTSC color

saturation level

1. Feed the split color bar sig­nal.
Group : VIDEO 1
Subject : N-COLOR

2. Connect the oscilloscope to
TP804.

» Using the control switches or the remote controller

buttons, adjust the data to have the -(B-Y) wave­form downhill straight.

» Using the control switches or the remote controller

buttons, adjust the difference betw een the 100%
white portion and the red portion to 0.0 ±0.02 Vp-p.

(same as 100% white)

26

No. Adjusting point Adjusting conditions Adjusting procedure

XG-NV7XU

15 PAL color

saturation level

16 SECAM color

saturation level

17 Video white

balance

1. Feed the PAL color bar sig­nal.
Group : VIDEO 1
Subject : P-COLOR

2. Connect the oscilloscope to
TP804.

1. Feed the SECAM color bar
signal.
Group : VIDEO 1
Subject : S-COLOR

2. Connect the oscilloscope to
TP804.

1. Feed the NTSC mono­scope pattern signal
Group : VIDEO 2
Subject : R OFF-SET

B OFF-SET

» Using the control switches or the remote controller

buttons, adjust the difference between the 100%
white portion and the red portion to 0.28 ±0.02 Vp-p.

100% White Red

» Using the control switches or the remote controller

buttons, adjust the data to have a level difference
of 0.28 ±0.02 Vp-p between the 100% white
portion and the red portion.

100% White Red

» Using the control switches or the remote controller

buttons, adjust so that the entire screen looks
evenly colorless.

18 DVD Contrast 1. Feed the color bar signal of

the 480I component signal to
the D-SUB input terminal.

2. Select the following subject.
Group : DVD
Subject : CONTRAST

3. Connect the oscilloscope to
TP805.

19 D VD Tint 1. Feed the color bar signal of

the 480I component signal
to the D-SUB input termi­nals. Feed the sync signal
only for the Y signal.

2. Select the following subject.
Group : DVD
Subject : TINT

3. Connect the oscilloscope to
TP807.

» Using the control switch or the button on the

remote controller, adjust the amplitude between
the black and 100% white to 2.1 ±0.02 Vp-p.

100% White

2.1±0.02Vp-p

» Using the control switch or the button on the

remote controller, adjust the B-Y waveform to form
a straight slope.

27

XG-NV7XU

No. Adjusting point Adjusting conditions Adjusting procedure

20 DVD Color 1. Feed the color bar signal of

the 480I component signal to
the D-SUB input terminal.

2. Select the following subject.
Group : DVD
Subject : COLOR

3. Connect the oscilloscope to
TP804.

21 Color system

performance
check

22 Video system

performance
check

1. Receive the color bar sig­nal.

1. Receive the monoscope
pattern signal.

» Adjust the level difference between the 100% white

and red portions to 0.1 ±0.02 Vp-p.

100% White Red

» In the process mode and select L1. Chec k the color

and tint.

» In the process mode and select L2. Check the pic-

ture, brightness and sharpness.

23 Audio system

performance
check

24 RGB1

performance
check

25 RGB2

panel link video
check

26 Off-timer

performance
check

» In the process mode nad select L3. Check the bass,

treble and balance.

1. Receive the RGB1 signal. » In the process mode and select L4. Check the pic-

ture, brightness, red, blue, clock, phase, horizontal
position, and vertical position.

1. Make the following settings:
RGB2 mode and XGA spe­cific for panel link. Enter the
32-step gradation pattern.

» Make sure that the gradation pattern is not corrupted

and that the black portion is not too sinking.

» In the process mode and select OFF. Make sure that

the off-timer starts with “5” (minutes), counts down
each minute in 1 second, and turns off the set at “0”.

28

No. Adjusting point Adjusting conditions Adjusting procedure

XG-NV7XU

27 Thermistor

performance
check

28 Automatic

synchronization
RGB1
(ANALOG)

29 Auto sync RGB

2 (panel link)

30 IrDA

performance
check

31 Keystone

correction
performance
check

1. Heat the thermistor using a
dryer.

1. Receive the PHASE check
pattern signal.

1. Receive the PHASE check
pattern signal.

» Make sure the “TEMP” is displayed.

» Call the VGA/S-VGA/XGA/SXGA/UXGA mode and

make sure that the clock, phase, horizontal and
vertical positions can be automatically adjusted.

» In the VGA/S-VGA/XGA/SXGA modes, make sure

that the H-POS and V-POS can be automatically
adjusted.

» Make sure the IrDA signal can be received.

» Make sure the keystone correction functions well.

» Make the following settings.32 Factory settings

Process
adjustment

Remote controller
setting

S4 “Factory setting 4”

29

XG-NV7XU

ADJUSTING THE PC INTERFACE (CPCi-0036CE01. PC I/F Unit)

1. Initializing the EEPROM

1) Press the S5001 switch to call the process mode.

2) Pick up the item S1 on the SSS menu. (The S1 is used to initialize the PC interface alone. Do not select the
item S2 because otherwise the other data than the PC interface will be initialized.)

2. Adjusting the levels

1 Oscilloscope setting

Set the range to DC 1 V/div. and 5 µ s/div.

2 Input signal

Feed the XGA 1024x768, 60Hz gradation waveform signal and the DTV (720P for example) signal.

3 Level adjustment and checking

1) Press the S5001 switch to call the process mode.

2) Adjust R750 so that the voltage at test point TL119 be 2.6 ±0.05V.

3) Set the BRIGHT data on the A/D menu to 125.

4) Adjust the R-BRIGHT data on the A/D menu so that the voltage at TP3 be 1.7V.

5) Adjust the G-BRIGHT data on the A/D menu so that the voltage at TP2 be 1.7V.

6) Adjust the B-BRIGHT data on the A/D menu so that the voltage at TP1 be 1.7V.

7) Make sure that the GAIN data on the A/D menu is 155.

8) Connect the synchroscope to TP3. Adjust the R-D data on the A/D menu so that the signal’s white peak be

3.6V. (Be also sure that the white and black portions of the gradation are not corrupted.)

9) Connect the synchroscope to TP1. Adjust the B-D data on the A/D menu so that the signal’s white peak be

3.6V. (Be also sure that the white and black portions of the gradation are not corrupted.)

10)

Connect the synchroscope to TP2. Adjust the G-D data on the A/D menu so that the signal’s white peak
be 3.6V. (Be also sure that the white and black portions of the gradation are not corrupted.)

11)

Feed the DTV signal instead. Enter only the Y component, not the Pb and Pr components.

12)

Adjust the R-BRIGHT data on the DTV menu so that the voltage at TP3 be 2.65V.

13)

Adjust the B-BRIGHT data on the DTV menu so that the voltage at TP1 be 2.65V.

14)

Press the S5001 switch to exit the process mode.

30