Sharp XGMB70XA Service Manual

SERVICE MANUAL

SX5Q3XGMB70XA

MULTIMEDIA-PROJECTOR

XG-MB70X A

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.

OUTLINE

This Service Manual covers only different points from Model XG-MB70X. For other technical points,
refer to the XG-MB70X Service Manual.

CONTENTS

» SPECIFICATIONS .........................................................................................................................................2

» A COMPARISON TABLE WITH THE UNIT OF XG-MB70X A......................................................................3

» IMPORTANT SERVICE SAFETY NOTES (FOR USA) ................................................................................4

» NOTE TO SERVICE PERSONNEL ..............................................................................................................5

» BALLAST UNIT OUTPUT POWER (LAMP OUTPUT) ADJUSTMENT .......................................................9

» TROUBLESHOOTING TABLE ...................................................................................................................10

» DESCRIPTION OF SCHEMATIC DIAGRAM .............................................................................................13

» SCHEMATIC DIAGRAM.............................................................................................................................14

» PRINTED WIRING BOARD ASSEMBLIES................................................................................................20

» PARTS LIST ...............................................................................................................................................24

» PACKING OF THE SET .............................................................................................................................34

XG-MB70X A

Page

SHARP CORPORATION

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

XG-MB70X A

SPECIFICATIONS

Product type Multimedia Projector

Model XG-MB70X

Video system NTSC3.58/NTSC4.43/PAL/PAL-M/PAL-N/PAL-60/SECAM/

DTV480I/DTV480P/DTV540P/DTV576I/DTV576P/DTV720P/DTV1035I/DTV1080I

Display method Single Chip Digital Micromirror DeviceTM (DMDTM) by Texas Instruments

DMD panel Panel size: 0.7"

No. of dots: 786,432 dots (1,024 [H] ✕ 768 [V])

Lens 1.5 ✕ electric zoom / focus lens, F2.0–2.5, f = 21.3–31.6 mm

Projection lamp 275 W DC lamp

Component input (INPUT 1/2)/ 15-pin mini D-sub connector

output (OUTPUT) signal Y: 1.0 Vp-p, sync negative, 75 Ω terminated

PB: 0.7 Vp-p, 75 Ω terminated
PR: 0.7 Vp-p, 75 Ω terminated

Horizontal resolution 750 TV lines (DTV720P)

Computer RGB input (INPUT 1/2)/ 15-pin mini D-sub connector

output (OUTPUT) signal RGB separate/sync on green type analog input: 0–0.7 Vp-p, positive, 75 Ω terminated

HORIZONTAL SYNC. SIGNAL: TTL level (positive/negative)
VERTICAL SYNC. SIGNAL: Same as above

Video input signal RCA connector: VIDEO, composite video, 1.0 Vp-p, sync negative, 75 Ω terminated

(INPUT 3)

S-video input signal 4-pin mini DIN connector

(INPUT 4) Y (luminance signal): 1.0 Vp-p, sync negative, 75 Ω terminated

C (chrominance signal): Burst 0.286 Vp-p, 75 Ω terminated

Audio input signal ø3.5 mm minijack: AUDIO, 0.5 Vrms, more than 22 kΩ (stereo)

USB terminal 4-pin B-type USB female connector

RS-232C terminal 9-pin mini DIN connector

LAN terminal 8-pin RJ-45 modular connector

Pixel clock 12–108 MHz

Vertical frequency 43–85 Hz

Horizontal frequency 15–70 kHz

Audio output 2.0 W (monaural)

Speaker system 4.0 cm ✕ 2.85 cm oval ✕1

Rated voltage AC 100–240 V

Input current 3.9 A

Rated frequency 50/60 Hz

Power consumption 370 W (Standard mode)/320 W (Eco mode) with AC 100 V

350 W (Standard mode)/300 W (Eco mode) with AC 240 V

Power consumption (standby) 6 W (AC 100 V) – 8 W (AC 240 V)

Heat dissipation 1,390 BTU/hour (Standard mode)/1,200 BTU/hour (Eco mode) with AC 100 V

1,315 BTU/hour (Standard mode)/1,130 BTU/hour (Eco mode) with AC 240 V

Operating temperature 41°F to 104°F (+5°C to +40°C)

Storage temperature –4°F to 140°F (–20°C to +60°C)

Cabinet Plastic

I/R carrier frequency 38 kHz

Dimensions (approx.) 12

Weight (approx.) 9.1 lbs. (4.1 kg)

Replacement parts Lamp unit (Lamp/cage module) (AN-MB70LP), Remote control (RRMCGA313WJSA), Power cord for U.S.,

7

/32" ✕ 3 33/64" ✕ 11 7/64" (310 (W) ✕ 89 (H) ✕ 282 (D) mm) (main body only)

12 7/32" ✕ 4 7/64" ✕ 11 5/16" (310 (W) ✕ 104 (H) ✕ 287 (D) mm) (including adjustment foot and projecting parts)

Canada, etc. (QACCDA007WJPZ), Power cord for Europe, except U.K. (QACCVA011WJPZ), Power cord for
U.K., Hong Kong and Singapore (QACCBA036WJPZ), Power cord for Australia, New Zealand and Oceania
(QACCLA018WJPZ), RGB cable (QCNWGA045WJPZ), USB cable (QCNWGA014WJPZ), Storage case
(GCASNA014WJSA), Lens cap (RCAPHA021WJSA), Projector manual and technical reference CD-ROM
(UDSKAA072WJZZ), “QUICK GUIDE” label (TLABZA717WJZZ), Operation manual (TiNS-C177WJZZ)

As a part of policy of continuous improvement, SHARP reserves the right to make design and
specification changes for product improvement without prior notice. The performance specifica­tion figures indicated are nominal values of production units. There may be some deviations from
these values in individual units.

2

XG-MB70X A

A COMPARISON TABLE WITH THE UNIT OF XG-MB70X A

XG-MB70X XG-MB70X A

Ref. No. Parts No. Change ★ Parts No. Description Code

DUNTKC612WEF0 → J DUNTKC612WEF5 MAIN Unit CU
DUNTKC613WEF0 J ← FORMATTER Unit CK
DUNTKC615WEF0 → J DUNTKC615WEF5 FRONT R/C Unit AN
DUNTKC681WEF0 → J DUNTKC681WEF5 REAR R/C Unit AN
RDENCA082WJZZ → J DUNTKD556WEF1 POWER SUPPLY Unit BR
or
RDENCA118WJZZ
RDENCA088WJZZ → J DSETUD496FMF2 BALLAST POWER Unit

– DUNTKD496WEF2 BALLAST Unit –

When you exchange a ballast unit
(DUNTKD496WEF2),
please order a ballast power supply unit
(DSETUD496FMF2).

J DUNTKD497FMF2 BALLAST Control Unit
RUNTKA090WJZZ J ← CMOS CAMERA Unit BS
RUNTKA091WJZZ J ← PHOTO SENSOR Unit AZ

3

XG-MB70X A

2

2

IMPORTANT SERVICE SAFETY NOTES (for USA)

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.

CAUTION: FOR CONTINUED PROTECTION

AGAINST RISK OF FIRE REPLACE ONLY
WITH SAME TYPE F701 (6.3A, AC250V)

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 A C 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.

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» 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. AC.) or more is excessive and indicates a
potential shock hazard which must be corrected before
returning the unit to the owner.

DVM

AC SCALE

1.5k ohm
10W

0.15 µF

TEST PROBE

TO EXPOSED
METAL PARTS

CONNECT TO
KNOWN EARTH
GROUND

SAFETY NOTICE

Many electrical and mechanical parts in DMD™
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 DMD™ 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.

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AVERTISSEMENT:La composante bimétallique dispose du

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

4

XG-MB70X A

NOTE T O SER VICE
PERSONNEL

UV-RADIATION PRECAUTION

The light source, UHP lamp, in the LCD projector
emits small amounts of UV-Radiation.

AV OID 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 UHP, dans le projecteur
LCD 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 AN-MB70LP
rated 275W.

4. The lamp emits small amounts of UV-Radiation, av oid
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. T oujours 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
AN-MB70LP, caractéristique 275W.

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.

5

XG-MB70X A

6
6

6
6

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UV-RADIATION PRECAUTION (Continued)

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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 de vices
since the stabilizer generates high voltages at its start.

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PRECAUTION POUR LES RADIATIONS UV (Suite)

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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

2

Reflecteur

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 exhaust fans , it is rec­ommended to place the cap of the optional lens on
the opening during servicing to avoid eye and skin
exposure.

Comme de petites quantités de radiation UV sont
émises par une ouverture entre les ventilateurs as­pirants, il est recommandé de placer le capuchon de
l’optique optionnelle sur l’ouverture pendant l’entretien
pour éviter une exposition des yeux et la peau.

6

XG-MB70X A

WARNING: High brightness light source, do not stare into the beam of light, or view directl y . Be especiall y

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

WARNING: TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK, DO NOT EXPOSE THIS UNIT TO

MOISTURE OR WET LOCATIONS.

CAUTION

RISK OF ELECTRIC SHOCK.
DO NOT REMOVE SCREWS

EXCEPT SPECIFIED USER

SERVICE SCREW.

CAUTION: TO REDUCE THE RISK OF ELECTRIC SHOCK,

DO NOT REMO VE CABINET.

NO USER-SERVICEABLE PARTS EXCEPT LAMP UNIT .

REFER SERVICING T O QU ALIFIED SERVICE

PERSONNEL.

The lighting flash with arrowhead within a
triangle is intended to tell the user that
parts inside the product are risk of electric
shock to persons.

The exclamation point within a triangle is
intended to tell the user that important
operating and servicing instructions are in
the manual with the projector.

CAUTION

(POWER Unit)

6.3A 250V

AVERTISSEMENT: Source lumineuse de grande intensité. Ne pas fixer le faisceau lumineux ou le regarder

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

6.3A, AC250V fuse.
(F701)

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

AVER TISSEMENT : AFIN D’EVITER TOUT RISQUE D’INCENDIE OU D’ELECTROCUTION, NE PAS PLACER

CET APPAREIL DANS UN ENDROIT HUMIDE OU MOUILLE.

ATTENTION

RISQUE
D’ÉLECTROCUTION. NE
PASR ETIRER LES VIS Á

L’EXCEPTION DE LA VIS DE

REPARATION UTILISATEUR

SPECIFIEES

L’éclair terminé d’une flèche à l’intérieur
d’un triangle indique à l’utilisateur que les
pi‘eces se trouvant dans l’appareil sont
susceptibles de provoquer une décharge
électrique.

Le point d’exclamation à l’intérieur d’un

A TTENTION: POUR EVITER TOUT RISQUE

D’ELECTR OCUTION, NE PAS RETIRER LE CAPOT .

AUCUNE DES PIECES INTERIEURES N’EST REPARABLE

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

LAMPE. POUR T OUTE REPARA TION, S’ADRESSER A UN

TECHNICIEN D’ENTRETIEN QUALIFIE.

triangle indique à l’utilisateur que les
instructions de fonctionnement et
d’entretien sont détaillées dans les
documents fournis avec le projecteur.

PRECAUTION

(Unité de PUTSSANCE)

6.3A 250V

Pour une protection
continue contre un
risques d’incendie, ne
remplacer qu’avec un
fusible 6.3A,AC250V
du même type.
(F701)

7

XG-MB70X A

Precautions for using lead-free solder

1 Employing lead-free solder

"PWBs" of this model employs lead-free solder. The LF symbol indicates lead-free solder, and is attached on the
PWBs and service manuals. The alphabetical character following LF shows the type of lead-free solder.

Example:

L Fa

Indicates lead-free solder of tin, silver and copper.

2 Using lead-free wire solder

When fixing the PWB soldered with the lead-free solder, apply lead-free wire solder. Repairing with conventional
lead wire solder may cause damage or accident due to cracks.
As the melting point of lead-free solder (Sn-Ag-Cu) is higher than the lead wire solder by 40°C, we recommend y ou
to use a dedicated soldering bit, if you are not familiar with how to obtain lead-free wire solder or soldering bit,
contact our service station or service branch in your area.

3 Soldering

As the melting point of lead-free solder (Sn-Ag-Cu) is about 220°C which is higher than the conventional lead solder
by 40°C, and as it has poor solder wettability, you may be apt to keep the soldering bit in contact with the PWB for
extended period of time. Ho we v er, since the land may be peeled off or the maximum heat-resistance temperature of
parts may be exceeded, remove the bit from the PWB as soon as you confirm the steady soldering condition.
Lead-free solder contains more tin, and the end of the soldering bit may be easily corroded. Make sure to turn on
and off the power of the bit as required.
If a different type of solder stays on the tip of the soldering bit, it is allo yed with lead-free solder. Clean the bit after
every use of it.
When the tip of the soldering bit is blackened during use, file it with steel wool or fine sandpaper.

Be careful when replacing parts with polarity indication on the PWB silk.

Lead-free wire solder for servicing

Part No. ★ Description Code
ZHNDAi123250E J φ0.3mm 250g(1roll) BL
ZHNDAi126500E J φ0.6mm 500g(1roll) BK
ZHNDAi12801KE J φ1.0mm 1kg(1roll) BM

8

XG-MB70X A

BALLAST UNIT OUTPUT POWER (LAMP OUTPUT) ADJUSTMENT

1. List of adjustment-related parts

When the following parts have been replaced, adjust the ballast unit output power (lamp output).

Parts Name Ref. No. Parts Code
1 Cement resistor R922 RR-WZA015WJZZ
2 Control PWB --- DUNTKD497FMF2
3 Ballast microprocessor (FLASH) IC7707 RH-iXB384WJZZQ

3' Ballast microprocessor (MASK) IC7707 RH-iXB390WJZZQ

4 5V regulator IC7704 VHiTA78L05F-1Y
5 PWM controller IC7701 VHiM51995AF-1Y

2. Adjustment tools

The following tools are required in order to adjust the ballast unit output power (lamp power).

Parts Name Parts Code Maker
1 Adjustment jig (resistance load 25Ω) RUNTZA018WJZZ Asahi Tushin
2 Connecting cord (conversion cable) QCNW-E008WJZZ SMK

3. Adjusting the ballast unit output power (lamp power)

Take the following procedure to adjust the ballast unit output power (lamp power).

[How to set up]

Tester

Ballast Unit
Lamp Cable
(QCNW-E190WJQZ)

MB70X A

Projector

Connecting Cord
(QCNW-E008WJZZ)

[How to adjust]

1. Disconnect the MB70X A projector's ballast unit lamp cable from the lamp. Connect the cable to the connecting
cord (QCNW-E008WJZZ).

2. Connect the connecting cord (QCNW-E008WJZZ) to the adjustment jig (RUNTZA018WJZZ).

3. Hook up the tester's negative probe and positive probe to the TP1 and TP2, respectively, of the adjustment jig
(RUNTZA018WJZZ).

4. Turn on the power of the MB70X A projector.

5. Warm up the projector for longer than 60 seconds.

6. Adjust the variable control (R7728) of the ballast control PWB (DUNTKD497FMF2) to achieve the tester
reading of 83±0.5 V.

(Voltage)

+

-

TP1

Adjustment Jig

(RUNTZA018WJZZ)

TP2

Specification: 83±0.5V

4. Precautions

1) Electric shock:
Be careful not to touch the adjustment jig's test points TP1 and TP2 during continuity because high voltage
and large current are applied at them.

2) Heat hazard:
Keep in mind that the adjustment jig's resistance load is hot during continuity.

3) Lamp cable connection:
Make sure the lamp cable and the connecting cord (QCNW-E008WJZZ) are tightly connected.
If they are poorly connected, smoke or fire may be caused due to an arc discharge.

9

XG-MB70X A

Checking the power unit

TROUBLESHOOTING TABLE

There is no voltage output
at P704.

YES

Which output voltage line
fails?

13V, 6

Is AC voltage(90 ~ 264V)
applied across the P701
connector?

YES

Is AC voltage(90
applied across the P702 or
P703 connector?

~

264V)

NO

Other

NO

Check the MAIN PWB unit.

Check the T705, IC704 and
their peripheral circuits.

Check the P701 or AC
cord.

Is the Bimetal SW open?

NO

Is the fuse F701 open?

NO

Is the resistor R717 open?

YES

YES

YES

Push the red button of the
bimetal.

Replace the F701.

Replace the R717.

NO

Is the fuse F705 open?

NO

Replace Power unit.

YES

Replace the F705.

10