Sharp PGM20, PG-M20S, PG-M20X, AN-60KT Service Manual

SERVICE MANUAL
SERVICE-ANLEITUNG

S72N3PG-M20XU

DIGITAL MULTIMEDIA PROJECTOR
DIGITALER MULTIMEDIA PROJEKTOR

PG-M20S
PG-M20X

MODELS
MODELLE

AN-60KT

PG-M20S
PG-M20X

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.

Im lnteresse der Benutzersicherheit (erforderliche Sicherheitsregeln in einigen Ländern) muß das Gerät in seinen
Originalzustand gebracht werden. Außerdem dürfen für die spezifizierten Bauteile nur identische Teile verwendet
werden.

CONTENTS

Page

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

» IMPORTANT SERVICE SAFETY

NOTES (for USA)............................................... 3

» NOTE TO SERVICE PERSONNEL ................... 4

» OPERATION MANUAL ...................................... 8

» REMOVING OF MAJOR PARTS ..................... 13

» RESETTING THE TO TAL LAMP TIMER ......... 19

» ELECTRICAL ADJUSTMENT........................... 21

» TROUBLE SHOOTING TABLE ........................ 28

» CHASSIS LAYOUT .......................................... 94

» BLOCK DIAGRAM........................................... 96

» OVERALL WIRING DIAGRAM ........................ 98

» SCHEMATIC DIAGRAM ................................ 100

» PRINTED WIRING BOARD ASSEMBLIES ... 146
» PARTS LIST

Ë

ELECTRICAL PARTS ................................ 153

Ë

CABINET AND MECHANICAL PARTS ..... 166

Ë

ACCESSORIES PARTS ............................ 170

Ë

PACKING PARTS....................................... 170

» PACKING OF THE SET ................................. 171

» AN-60KT ........................................................ 172

» TECHNISCHE DATEN..................................... 49

» HINWEISE FÜR DAS

WARTUNGSPERSONAL ................................ 50

» BEDIENUNGSANLEITUNG ............................ 52

» ENTFERNEN DER HAUPTTEILE................... 57

» RÜCKSTELLEN DES

LAMPENBETRIEBSZEIT-TIMERS .................. 63

» ELEKTRISCH EINSTELLUNG ........................ 66

» FEHLERSUCHTABELLE ................................. 73

» CHASSIS-ANORDNUNG ................................ 94

» BLOCKSCHALTBILD ....................................... 96

» GESAMTSCHALTPLAN .................................. 98

» SCHEMATISCHER SCHALTPLAN................ 100

» LEITERPLATTENEINHEITEN ....................... 146

» ERSATZTEILLISTE

Ë

ELEKTRISCHE BAUTEILE ....................... 153

Ë

GEHÄUSE UND MECHANISCHE

BAUTEILE.................................................. 166

Ë

ZUBEHÖRTEILE ....................................... 170

Ë

VERPACKUNGSTEILE.............................. 170

» VERPACKEN DES GERÄTS ......................... 171

» AN-60KT ........................................................ 172

INHALT

Seite

SHARP CORPORATION

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

PG-M20S
PG-M20X

Specifications

Product type

Model

Video system

Display method

DMD panel

Lens

Projection lamp

Component input signal

(INPUT1)

Horizontal resolution

Computer RGB input signal

(INPUT 1)

S-video input signal

(INPUT 2)

Video input signal

(INPUT 3)

Pixel clock

Vertical frequency

Horizontal frequency

Audio input signal

Audio output

Speaker system

Rated voltage

Input current

Rated frequency

Power consumption

Power dissipation

Operating temperature

Storage temperature

Cabinet

I/R carrier frequency

Dimensions (approx.)

Weight (approx.)

Supplied accessories

Replacement parts

Digital Multimedia Projector
PG-M20X/PG-M20S
NTSC 3.58/NTSC 4.43/PAL/PAL-M/PAL-N/PAL 60/SECAM/
DTV480I/DTV480P/DTV720P/DTV1080I
Single Chip Digital Micromirror Device™ (DMD™) by Texas Instruments
Panel size: 0.7" (17.8 mm), 1 chip XGA DMD(PG-M20X)/0.55"(14.0mm)",1 chip SVGA DMD(PG-M20S)
No. of dots: 786,432 dots (1,024 [H] × 768 [V])(PG-M20X)/480.000 dots (800[H] × 600[V])(PG-M20S)
1–1.2 × zoom lens, F1.75–2.04, f = 28.0–33.5 mm
High Intensity Discharge Lamp (HID Lamp), DC 210 W
29-pin connector
DVI input signal:Digital 250–1,000 mV 50 Ω

Y: 1.0 Vp-p, sync negative, 75 Ω terminated

: 0.7 Vp-p, 75 Ω terminated

P

B

: 0.7 Vp-p, 75 Ω terminated

P

R

700 TV lines (DTV720P)(PG-M20X)/500TV Lines (S-Video[NTSC3.58])(PG-M20S)
29-pin connector
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
4-pin Mini DIN connector
Y (luminance signal): 1.0 Vp-p, sync negative, 75 Ω terminated
C (chrominance signal): Burst 0.286 Vp-p, 75 Ω terminated
RCA connector: VIDEO, composite video, 1.0 Vp-p, sync negative, 75 Ω
terminated
12–230 MHz(PG-20X)/12-120MHz(PG-M20S)
43–100 Hz
15–126 kHz(PG-20X)/15-102kHz(PG-M20S)
ø3.5 mm M

2.0 W (monaural)
4 cm × 3 cm
AC 100–240 V

3.2 A
50/60 Hz
290 W
<1,090 BTU/hour
41°F to 95°F (+5°C to +35°C)
–4°F to 140°F (–20°C to +60°C)
Plastic
38 kHz

5

⁄8" × 3" × 11 15⁄16" (219 (W) × 76 (H) × 303 (D) mm) (main body only)

8

3

8

⁄4" × 3 1⁄4" × 12 1⁄2" (223 (W) × 83 (H) × 318 (D) mm) (including adjustment feet

and projecting parts)

5.8 lbs. (2.6 kg)
Remote control, Two R-03 batteries, Power cord for U.S., Canada etc. (6', 1.8 m), Power
cord for Europe, except U.K. (6', 1.8 m), Power cord for U.K., Hong Kong and Singapore (6',

1.8 m), Power cord for Australia, New Zealand and Oceania (6', 1.8 m), DVI to 15-pin D-sub
cable (6', 1.8 m), USB cable (6', 1.8 m), Carrying case, Lens cap (attached), Lens cap
strap, Terminal cover (attached), CD-ROM, Operation manual, Quick reference guides
Lamp unit (Lamp/cage module) (BQC-PGM20X//1), Remote control (RRMCGA013WJSA),
Two R-03 batteries (“AAA” size, UM/SUM-4, HP-16, or similar), Power cord for U.S., Canada
etc. (QACCDA007WJPZ), Power cord for Europe, except U.K. (QACCV4002CEZZ), Power
cord for U.K., Hong Kong and Singapore (QACCB5024CENA[PG-M20X]/QACCBA012WJPZ

DVI to 15-pin D-sub cable
Carrying case
(UBNDT0013CEZZ),Terminal cover (GCOVD0103CESA), CD-ROM (UDSKA0058CEN1
[PG-M20X]/UDSKAA009WJZZ[PG-M20S]),Operation manual (TINS-7609CEZZ[PG-M20X]
/TINS-A209WJZZ[PG-M20S]), Quick reference guides

Analog 0.7 Vp-p 75 Ω

INIJACK

: AUDIO, 0.5 Vrms, more than 47 kΩ (stereo)

Power cord for Australia,[PG-M20S]), New Zealand and Oceania (QACCL3022CEZZ),

(GCASN0005CESA), Lens cap (CCAPHA001WJ01), Lens cap strap

(QCNWGA010WJZZ), USB cable (QCNWG0001WJPZ),

This SHARP projector uses a DMD panel. This very sophis­ticated panel contains 786,432(PG-M20X)/480,000(PG-M20-

S) pixels. As with any high technology electronic equipment
such as large screen TVs, video systems and video cameras,
there are certain acceptable

must conform to.

tolerances that the equipment

Specifications are subject to change without notice.

This unit has some inactive pixels within acceptable toler­ances which may result in inactive dots on the picture screen.
This will not affect the picture quality or the life expectancy
of the unit.

2

PG-M20S

2
2

PG-M20X

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.

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 xcessiv e 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 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 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

PG-M20S
PG-M20X

NOTE TO SERVICE
PERSONNEL

UV-RADIATION PRECAUTION

The light source, metal halide lamp, in the pr ojector
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.

NO TE POUR LE PERSONNEL
D’ENTRETIEN

PRECAUTION POUR LES RADIATIONS UV

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

EVITEZ TOUTE EXPOSITION DIRECTE
DES YEUX ET DE LA PEAU.

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

1. Toujours por ter 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’extér ieur 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 BQC­PGM20X//1 rated 85V/210W.

4. The lamp emits small amounts of UV-Radiation,
avoid 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 BQC-PGM20X//1 caractéristique 85V/210W.

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

PG-M20S

4

5

PG-M20X

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 ! –– Ne ver turn the power on without the
lamp to avoid electric-shock or damage of the
devices since the stabilizer generates high v oltages
at its start.

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

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 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.

Note: Please obtain a lens cap before servicing a

models PG-M20X/PG-M20S that is received
without one.

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.

Remarque: Priére de se procurer un capuchon

d'optique acant d'entretien un modéle
PG-M20X/PG-M20S qui est livré sans.

5

PG-M20S
PG-M20X

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

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 REMO VE SCREWS

EXCEPT SPECIFIED USER

SERVICE SCREWS

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.

AVERTISSEMENT: Sour ce lumineuse de grande intensité. Ne pas fixer le faisceau lumineux ou le regar der

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

A VERTISSEMENT : AFIN D’EVITER T OUT RISQ UE D’INCENDIE OU D’ELECTR OCUTION, NE PAS PLACER

CET APPAREIL DANS UN ENDROIT HUMIDE OU MOUILLE.

ATTENTION

RISQUE

D’ELECTR OCUTION NE

PASRETIRER LES VIS, A

L’EXCEPTION DES VIS DE

REPARATION UTILISATEUR

SPECIFIEES

ATTENTION: POUR EVITER TOUT RISQ UE

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 REPARATION, S’ADRESSER A UN

TECHNICIEN D’ENTRETIEN QUALIFIE.

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

6

PG-M20S
PG-M20X

Precautions for using lead-free solder

1 Employing lead-free solder

"Input and key 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 you
to use a dedicated soldering bit, if you are not familiar with how to obtain lead-free wire solder or soldening bit,
contact our service station or service ranch 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 wettabillty, you may be apt to keep the soldering bit in contact with the PWB for
extended period of time. However, Since the land ma y be peeled off or the maxim um heat-resistance temperature of
parts may be excoeded, remove the bit from the PWB as soon as you conurm the steady soldering condition.
Lead-free solder contains more tin, and the end of the soldering bit may be easily corroded. Make sure to tum 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 alloyed 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.

Becareful 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

7

PG-M20S
PG-M20X

Location of Controls

Projector (Front and Top View)

LAMP REPLACEMENT
indicator

Illuminates in green normally.
Replace the lamp when the
indicator illuminates in red.

POWER indicator

Illuminates in red, when the
projector is in standby.
When the power is turned
on, this indicator will
illuminate in green.

POWER button

Turns the power on or off.

LENS button

For adjusting Keystone or
Digital Shift setting.

Adjustment buttons
(

For selecting menu items.

)

ENTER button

For setting items selected
or adjusted on the menu.

AV MUTE button

For temporarily turning off the
sound and picture.

Zoom knob

TEMPERATURE
WARNING indicator

Illuminates in green
normally. When the
internal temperature
rises, this indicator will
illuminate in red.

INPUT button

For switching input mode
1, 2 or 3.

MENU button

For displaying adjustment
and setting screens.

VOLUME buttons

For adjusting the
speaker sound level.

UNDO button

For undoing an operation
or returning to the default
settings.

AUTO SYNC button

For automatically
adjusting images when
connected to a computer.

Focus ring

Foot releases/Adjustment
feet

For adjusting the projector’s
height.

Terminal cover

Speaker

Remote control
sensor

Attaching the terminal cover

Attach the terminal cover by
placing it on the side panel of the
projector and pressing it into
place, as shown in the illustration.

8

Projector (Side View)

PG-M20S
PG-M20X

INPUT 1 terminal

Port for DVI digital, computer
RGB, and COMPONENT
signals.

INPUT 2 terminal

Terminal for connecting video
equipment with an S-VIDEO
terminal.

AC socket

USB terminal

For connecting a compu­ter using a USB cable.

INPUT AUDIO terminal

Shared audio terminal for
INPUT 1, INPUT 2, and
INPUT 3.

INPUT 3 terminal

For connecting video
equipment.

Exhaust vent

Kensington Security
Standard connector

Using the Kensington Lock

•

This projector has a Kensington Security Standard connector for use with a Kensington MicroSaver Security
System. Refer to the information that came with the system for instructions on how to use it to secure the
projector.

Attaching the lens cap

After putting the lens cap strap on the
lens cap, pass the other end of the strap
through the hole under the projector, next
to the lens, as shown in the illustration.

Bottom View

9

PG-M20S
PG-M20X

Remote Control

Remote control signal transmitter

FORWARD/BACK button

Moves forward or backwards
when connected to a computer
using a USB cable. Same as the
[Page Down] and [Page Up]
keys on a computer keyboard.

AV MUTE button

For temporarily turning off the
sound and picture.

VOLUME buttons

For adjusting the speaker
sound level.

INPUT 2 button

For switching the input mode to
INPUT 2.

INPUT 1 button

For switching the input mode to
INPUT 1.

AUTO SYNC button

For automatically adjusting
images when connected to a
computer.

LENS button

For adjusting Keystone or
Digital Shift setting.

ENTER button

For setting items selected or
adjusted on the menu.

POWER button

Turns the power on or off.

ENLARGE (Enlarge/Reduce)
buttons

For enlarging or reducing part of the
image.

FREEZE button

For freezing images.

INPUT 3 button

For switching the input mode to
INPUT 3.

RESIZE button

For switching the screen size
(NORMAL, BORDER, etc).

GAMMA button

For correcting the brightness of an
image, when the images displayed
are hard to see because of the
brightness of the room. Four
gamma modes are available to
choose from.

MENU button

For displaying adjustment and
setting screens.

Adjustment buttons
(

For selecting menu items.

)

UNDO button

For undoing an operation or
returning to the default settings.

10

Connection Pin Assignments

DVI Digital / Analog INPUT 1 port : 29 pin connector

• DVI Digital INPUT

•••••••••

9

••••

21

17

••••

18 23

~

~

~

•••••••••

••••

••••

16

87

C1
C2

C4
C5

C3

24

Pin No. Signal Pin No. Signal

10 T.M.D.S data 1+ C1 Not connected
11 T.M.D.S data 1 shield C2 Not connected
12 Not connected C3 Not connected
13 Not connected C4 Not connected
14 +5V current C5 Ground
15 Ground

PG-M20S
PG-M20X

1 T.M.D.S data 2– 16 Hot plug detection
2 T.M.D.S data 2+ 17 T.M.D.S data 0–
3 T.M.D.S data 2 shield 18 T.M.D.S data 0+
4 Not connected 19 T.M.D.S data 0 shield
5 Not connected 20 Not connected
6 DDC clock 21 Not connected
7 DDC data 22 T.M.D.S clock shield
8 Not connected 23 T.M.D.S clock+
9 T.M.D.S data 1– 24 T.M.D.S clock–

• DVI Analog RGB Input

Pin No. Signal Pin No. Signal

1 Not connected 16 Hot plug detection
2 Not connected 17 Not connected
3 Not connected 18 Not connected
4 Not connected 19 Not connected
5 Not connected 20 Not connected
6 DDC clock 21 Not connected
7 DDC data 22 Not connected
8 Vertical sync 23 Not connected

9 Not connected 24 Not connected
10 Not connected C1 Analog input Red
11 Not connected C2 Analog input Green
12 Not connected C3 Analog input Blue
13 Not connected C4 Horizontal sync
14 +5V current C5 Ground
15 Ground

4-pin USB connector

12

• USB connector: 4 pin B-type USB connector

Pin no. Signal Name

1 VCC USB current
2 USB– USB data–
3 USB+ USB data+
4 SG Signal Ground

• DVI Analog Component Input

Pin No. Signal Pin No. Signal

1 Not connected 16 Not connected
2 Not connected 17 Not connected
3 Not connected 18 Not connected
4 Not connected 19 Not connected
5 Not connected 20 Not connected
6 Not connected 21 Not connected
7 Not connected 22 Not connected
8 Not connected 23 Not connected

9 Not connected 24 Not connected
10 Not connected C1 Analog input Pr/Cr
11 Not connected C2 Analog input Y
12 Not connected C3 Analog input Pb/Cb
13 Not connected C4 Not connected
14 Not connected C5 Ground
15 Ground

43

11

PG-M20S
PG-M20X

Dimensions

Side View Side ViewTop View

Rear View

12

(318.3)

Front View

1

/

8

3
(80)

9

/

16

3

1

(34.2)

5

/

16

(7.5)

1115/

16

(303)

3

/4 (223)

8

5

8

/8 (219)

1

5

/16 (128)

1

1

/

2

/

8

9

4

/16 (115.5)

11

7

/16 (195)

1

3

/4 (82.5)

3

2
(55.5)

3

2

/

(60)

8

/

16

(38.7)

3

(76.1)

1

3

(82.9)

/

4

Bottom View

1

4

(104)

/

8

5

10

/

(261.5)

16

Units: inches (mm)

12

REMOVING OF MAJOR PARTS

1. Removing the top panel

1-1. Detach the terminal block cover.
1-2. Remove the five lock screws from the top panel.
1-3. Press the right side of the bottom body to undo the hook.
1-4. Press the left side of the bottom body to undo the hook.
1-5. Press the front of the bottom body to undo the hook. Get the top panel loose from the bottom body.
1-6. Slightly raise the front of the top panel and disconnect the speaker connector.

2. Removing the PC I/F PWB and cooling fan

2-1. Disconnect the connector.
2-2. Remove the three lock screws from the PC I/F PWB and then the two hex support screws.
2-3. Disconnect the connector and take out the cooling fan.

Top panel

1-2

PG-M20S
PG-M20X

1-6

1-5

1-2

1-4

1-2

1-2

1-3

1-1

Terminal block cover

1-2

2-2

2-1

PC I/F PWB unit

2-3

2-3

Cooling fan

13

2-2

PG-M20S
PG-M20X

3. Removing the operation PWB

3-1. Remove the two lock screws from the operation PWB and slightly raise this PWB.
3-2. Disconnect the connectors.

4. Removing the optical mechanism

4-1. Remove the two lock screws from the lamp socket.
4-2. Raise the two lamp socket lead fixtures.
4-3. Disconnect the connectors.
4-4. Remove the six lock screws from the optical mechanism.

3-2

3-1

3-1

Operation PWB unit

4-2

4-1

4-4

Optical mechanism

4-3

14

5. Removing the other PWBs

5-1. Disconnect the connectors.
5-2. Remove the four lock screws from the power PWB.
5-3. Remove the lock screw from the ballast PWB unit.
5-4. Remove the three hex support screws from the input PWB.
5-5. Remove the lock screw from the terminal block cover.
5-6. Remove the three lock screws from the PFC PWB.

5-4

Input PWB unit

5-2

PG-M20S
PG-M20X

5-5

Ballast PWB unit

5-3

5-1

5-1

5-1

PFC PWB unit

5-6

Power PWB unit

Bottom body

15

PG-M20S

ly

FormatterPWBunit

Backerplateassembly

DMD(DigitalMicromirror
Device)chip
+OuterFrame
+C-spring

Heatsink

Prismsurface

Mirroradjustingplate

e

PG-M20X

6. Removing the formatter PWB

6-1. Disconnect the connector.
6-2. Remove the two lock screws from the heat sink.
6-3. Remove the four lock screws from the backer plate assembly, and detach the formatter PWB.
Note: The DMD (Digital Micromirror Device) unit is easily affected by static electricity. In handling this unit, be sure
to wear a wristband or take other anti-static measure.

FormatterPWBunit

6-1

Backerplateassemb

6-3

DMD(DigitalMicromirror
Device)unit

Precautions in replacing the DMD chip
Note: Be careful not to allow dust and fingerprint

on the cover glass of DMD chip and prism
surface of optical engine.

1. When you fix 4screws of backer plate assemb ly,
press backer plate to f ormatter PWB and fix by
cross multiply step by step.

2. If something shade appears on the projection
screen like Fig1, release 2 screws on mirror
adjusting plate and move that plate to adjust
illumination area of DMD chip.

Heatsink

6-2

Fig.1

Shad

16

PG-M20S
PG-M20X

* Precautions in setting up the DMD (Digital Micromirror Device) unit

Before connecting the formatter PWB to the optical engine, take the following steps. Look at the voltage rank marking
that is on the DMD itself. Referring to this marking, set the DIP switches on the formatter PWB. And connect this PWB
to the optical engine. Wrong settings will adversely affect the system performance.

Voltage rank marking
This sample is "C".

Voltage ranking system with the DIP switches on formatter PWB

BCDE

* Connecting the FPC extension cables (QCNW-A298WJZZ)

Connect the cables to the formatter PWB (TO FMT) and the PC I/F PWB (TO PC), referring to the silk-screen-printed
markings. See the sketch below. (The FPC is already connected at TO PC.)

TOFMT

17

TOPC

PG-M20S
PG-M20X

Outline of the optical unit

<Layout>

Projection lens

Relay lenses

Rod lens

Reflector

Lamp

UV/IR filter

Prism

    Item

Lamp
UV/IR filter

Color wheel
Rod lens

Relay lenses
Reflector

Prism

DMD chip

Projection lens

DMD chip

Color wheel

Function
Light source. DC-driven high-pressure mercury vapor lamp.
Used to absorb ultraviolet and infrared rays.
Used to let the source light through the color filter and to
separate it into R, G and B colors.
Used to make for uniform light beams.
Used to collect the light from the rod lens into the DMD
chip.
Used to reflect the light from the relay lenses against the
DMD chip.
Used to introduce the light from the reflector over the eff ec­tive surface of the DMD chip. When the micromirror gets
tilted (ON) as specified, the reflected light is guided to the
projection lens.
Used to turn on and off the micromirror in response to the
ratio of color components at each dot and thus to reflect the
incoming light accordingly.
Used to enlarge the light from the DMD chip and to get the
light projected on the screen.

18

RESETTING THE TOT AL LAMP TIMER

PG-M20S
PG-M20X

Resetting the Lamp

Reset the lamp timer after replacing the lamp.

1

Connect the power cord.

•

Plug the power cord into the AC socket
of the projector.

2

Reset the lamp timer.

•

While pressing simultaneously

, , and on the projec-

tor, press

•

ÒLAMP 0000HÓ is displayed, indicating
that the lamp timer is reset.

on the projector.

Timer

AC socket

POWER button

Adjustment buttons

|

|

)

(

Info

•

Make sure to reset the lamp timer only
when replacing the lamp.If you reset the
lamp timer and continue to use the same
lamp, this may cause the lamp to become
damaged or explode.

ENTER button

■ The warning lights on the projector indicate problems inside the projector.

■ If a problem occurs, either the TEMPERATURE WARNING indicator or the LAMP REPLACEMENT

indicator will illuminate red, and the power will turn off. After the power has been turned off, follow
the procedures given below.

TEMPERATURE
WARNING

POWER
indicator

indicator

LAMP
REPLACEMENT
indicator

About the TEMPERATURE WARNING indicator

If the temperature inside the projector in­creases, due to blockage of the air vents, or
the setting location,
lower left corner of the picture. If the tem­perature keeps on rising, the lamp will turn
off and the TEMPERATURE WARNING in­dicator will blink, the cooling fan will run for
further 90 seconds, then the power will be
shut off. After
perform the following measures.

Maintenance indicator Condition Problem Possible Solution

TEMPERA-

TURE

WARNING

indicator

LAMP

REPLACE-

MENT

indicator

Normal Abnormal

Off

Green on

Green
blinks

when the

lamp is

active.

will blink in the

appears, be sure to

Abnormal

The internal

Red on/
Power off

Red
blinks

Red on/
Power off

temperature is
abnormally high.

Time to change
the lamp

The lamp does
not illuminate.

• Blocked air intake

• Cooling fan break-

down

• Internal circuit failure

• Clogged air intake

• Lamp usage time

exceeded 1,900
hours

• Burnt-out lamp

• Lamp circuit failure

LAMP
REPLACEMENT
indicator

■When the lamp
exceeds 1,900 cumulative hours
of use,
on the screen in yellow. When
the cumulative hours of use
reach 2,000,
change to red, the lamp will au­tomatically turn off and then the
projector as well. At this time , the
LAMP REPLACEMENT indica­tor will illuminate in red.

■If you try to turn on the projector
a fourth time without replacing
the lamp, the projector will not
turn on.

• Relocate the projector to an area
with proper ventilation.

• Take the projector to your nearest
Sharp Authorized Projector Dealer
or Service Center for repair.

• Take the projector to your nearest
Sharp Authorized Projector Dealer
or Service Center for repair or
lamp replacement.

• Please exercise care when
replacing the lamp.

About the

will be displayed

will

19

PG-M20S
PG-M20X

How to Release the System Lock

Turn on the power. If the system lock is applied, the system-resetting screen appears. Press the following keys in this
order.

MENU → ENTER → ENTER → MENU → UNDO → UNDO → MENU

After pressing the MENU key first, press the remaining six keys within 10 seconds.

20

ELECTRICAL ADJUSTMENT

No. Adjustment Items Adjustment Conditions Adjustment Procedures

PG-M20S
PG-M20X

1 Initialization of

EEPROM

2 Adjustment of CW

index

3 Adjustment of

RGB gradation
reproduction

1. Tur n on the power (the lamp lights
up) and warm up the system for 15
minutes.

1. Signal input: 64-step color bar

2. Select the following group and sub­ject.
Group: DLP
Subject: Select CW-INDEX.

1. Feed the SMPTE pattern signal.

2. Select the following group and sub­ject.
Group: DLP
Subject: G1-GAIN

1. Carry out the following setting.
Press SW2001 to enter the process
mode, and ex ecute S2 on SSS menu.

1. Feed the signal to INPUT 1.

2. Select subject and make adjustment
so that the lamp gradation patterns
of R, G and B should be smooth with­out noise.

R
G
B

1. Confirm that 100% and 95% white
gradation, and 0% and 5% black g r a­dation are discernible.

2. If the white gradation looks differently,
do fine adjustment by G1-GAIN.

4 Adjustment of

video brightness/
contrast

5 Adjustment of

video tint

1. Feed the NTSC100% window pat­ter signal. (Burst signal)

2. Select the following group and sub­ject.
Group: VIDEO
Subject: AUTO

1. Feed the split color bar signal.

2. Select the following group and sub­ject.
Group: VIDEO
Subject: TINT

21

1. After signal input, select AUTO us­ing the set's switch or the remote
controller's button for automatic ad­justment.

1. Confirm the fixed value.
Fixed value: 128

PG-M20S
PG-M20X

No. Adjustment Items Adjustment Conditions Adjustment Procedures

6 Adjustment of

NTSC color
saturation

7 Adjustment of PAL

color saturation

8 Adjustment of

SECAM color
saturation

9 Adjustment of

COMPO G bright­ness

1. Feed the internal 8ch (split color bar)
signal.

2. Select the following group and sub­ject.
Group: VIDEO
Subject: N-COLOR

1. Feed the PAL color bar signal.

2. Select the following group and sub­ject.
Group: VIDEO
Subject: P-COLOR

1. Feed the SECAM color bar signal.

2. Select the following group and sub­ject.
Group: VIDEO
Subject: S-COLOR

1. Input signal: 0% gray pattern sig­nal (480I)

2. Select the following group and sub­ject.
Group: COMPO
Subject: G-BRIGHT

1. Confirm the fixed value.
Fixed value: 59

1. Confirm the fixed value.
Fixed value: 59

1. Confirm the fixed value.
Fixed value: 59

1. Feed the signal to INPUT 1.
Make adjustment so that some bits
should be missing in the picture.

10 Adjustment of

COMP CR-Offset

11 Automatic Adjust-

ment of RGB
white balance

12 Automatic Adjust-

ment of SRGB
white balance

1. Feed the color difference signal
(480I): Y 0% brightness, Cb and Cr
0% white patterns.
Group: COMPO
Subject: AUTO

1. Feed the 50% gray pattern signal
(XGA, 60 Hz [PG-M20X]/SVGA,60
Hz [PG-M20S]).

2. Select the following group and sub­ject.
Group: DLP
Subjects: R1-GAIN (Red)

B1-GAIN (Blue)

1. Feed the 50% gray pattern signal
(XGA, 60 Hz [PG-M20X]/SVGA,60
Hz [PG-M20S]).

2. Select the following group and sub­ject.
Group: DLP
Subjects: S-R1-GAIN (Red)

S-G1-GAIN (Green)
S-B1-GAIN (Blue)

1. After signal input, select AUTO us­ing the set's switch or the remote
controller's button for automatic ad­justment.

1. Adjust R-1 GAIN and B1-GAIN so that
x-value should be 266±3 and y-value
320±3.

1. Set the value of S-R1-GAIN to 34.

2. Adjust S-G1-GAIN and S-B1-GAIN
so that x-value should be 310±3 and
y-value 335±3.

22

No. Adjustment Items Adjustment Conditions Adjustment Procedures

PG-M20S
PG-M20X

13 Automatic adjust-

ment of video
white balance

14 Automatic adjust-

ment of DTV white
balance

15 Adjustment of

DLP voltage (For
reference)

16 Confirmation and

re-adjustment of
white balance

1. Feed the 50% gray pattern signal
(NTSC, burst signal).

2. Select the following group and sub­ject.
Group: DLP
Subjects: V-R1-GAIN (Red)

V-B1-GAIN (Blue)

1. Feed the 50% gray pattern signal
(480I, color difference signal).

2. Select the following group and sub­ject.
Group: DLP
Subjects: C-R1-GAIN

C-B1-GAIN

1. Read voltage rank of DLP descrip­tion.

2. Set the switch corresponding to the
rank which has been read. (on the
formatter PWB)

1. The adjusting conditions for each
item are as follows:
For RGB input, see Item 11
For SRGB input, see Item 13
For video input, see Item 14
For DVT input, see Item 12

1. Adjust V -R1-GAIN and V-B1-GAIN so
that x-value should be 265±3 and y­value should be 298±3.

1. Adjust C-R1-GAIN and C-B1-GAIN
so that x-value should be 263±3 and
y-value should be 295±3.

1. Carry out adjustment when DLP chip
has been replaced or combination of
chip and formatter has been changed.

2. Rank: BCDE
Setting value: 1234

Confirm that there is no deviation in white
balance from that of the monitoring
equipment.
For readjustment, proceed in the order
of RGB input, video input and DTV in­put.

17 Confirmation of

color-related
operation

18 Confirmation of

picture-related
operation

19 Confirmation of

RGB

20 Confirmation of

off-timer operation

21 Confirmation of

thermistor opera­tion

1. Receive the color bar signal. 1. Select L1 in the process mode.
Check the performance of color and
tint.

1. Receive monoscope pattern signal. 1. Se lec t L2 i n th e pr ocess mode.
Check Picture, Brightness and Sharp­ness.

1. Receive the RGB signal. 1. Select L4 on the process mode.
Check Picture, Brightness, Red, Blue,
Clock, Phase, H-POS and V-POS.

1. Select OFF in the process mode.
Confirm that the off-timer starts with
5-minute display, counts 1 minute for
1 second, and turns off when 0 minute
is displayed.

1. Heat the thermistor by dryer. 1. Confir m that the temperature is dis­played.

23

PG-M20S
PG-M20X

No. Adjustment Items Adjustment Conditions Adjustment Procedures

22 Automatic sync

operation

1. Receive the phase checking pattern
signal.

1. Confirm that Clock, Phase, H-POS
and V-POS can be automatically
adjusted in the VGA/S-VGA/XGA
mode.

23 Confirmation of

USB operation

Connect the set to a personal computer
by USB cable.

Using the remote controller, make sure
that feed and return operations are ef­fective on the display of the personal
computer.

24 Factory settings 1. Make the following settings.

Process Remote controller
adjustment settings

S4 "Factory Setting 4"

How to Adjust the PC I/F unit

1. Initialization of EEPROM

1) Press SW2002 to enter the process mode.

2) Execute S1 on the SSS menu. (By S1, all the contents of EEPROM are initialized.)

3) Confirm that the program version "Ver. XXX" has become the latest one

2. Adjusting items

1) Adjustment of RGB drive/gain
(1) feed the window pattern signal that has 100% and 0% signals.
(2) Select AUTO among the A/D items in the process mode and carry out adjustment.

24

» Entering the adjustment process mode

There are follwing two methods.

» Press the SW2001 on the KEY PWB unit.

» Press the follwing keys in this order.
AV MUTE→AV MUTE→Adj up→Adj down→ENTER→ENTER→MENU

» Adjustment mode process menu

Group Sub Group Subject

Adjust PC Image A/D R-BRIGHT

G-BRIGHT
B-BRIGHT
R-D
B-D
G-D
AD-AUTO

Adjust DLP Image DLP R1-BLK

R1-GAIN
G1-BLK
G1-GAIN
B1-GAIN
CW-INDEX
S-R1-GAIN
S-G1-GAIN
S-B1-GAIN
C-R1-GAIN
C-B1-GAIN
V-R1-GAIN
V-B1-GAIN

Adjust VIDEO Image VIDEO PICTURE

BRIGHT
TINT
N-COLOR
P-COLOR
S-COLOR
STAT-GAIN
VIDEO-AUTO

Adjust Component Image DTV G-BRIGHT

CB-OFFSET
CR-OFFSET
COMPO-AUTO

Process mode LINE L1

L2
L3
OFF
TEMP OFF
SENSOR CHECK

INTIAL SETTING SSS TIME

S1
S2
S3
S4
S5

PG-M20S
PG-M20X

25

PG-M20S
PG-M20X

Group Sub Group Subject

Sample Pattern PATTERN RGB

RGB(50)
CROSS
FOCUS
SETP
COLOR
CHR

Adjust CVIC CVIC-PROGRSSIVE MODE

IP
MDSW
PTGSW
C-TESTSW
C-ILG-LY
C-MOD-LY
C-VE-LV

CVIC-ENHANCE-VIDE ENH-PLUS

ENH-MINUS
DFC

CVIC-ENHANCE-HTTV ENH-PLUS

ENH-MINUS
DFC

CVIC-ENHANCE-RGB MODE

ENH-GAIN
ENH-PLUS

CVIC-SCREEN CUBIC-RGB

CUBIC-VEDEO

CVIC-NR YNR-LEVEL

YNR-K
YNR-FSEL
CNR-LEVEL
CNR-K
CNR-FSEL
CNR-FILSW

CVIC-PTG TESTSW

ENABLE
MV-F
VDDTP

CVIC-CMS RED

YELLOW
GREEN
CYAN
BLUE
MAGENTA

CVIC-DEGAMMA TABLE

Version Check etc Special IPL

IPL2
E2PROM
ADR RD/WR
USB-MODE

26

How to write in a Serial number

Install the new program for the software into your PC
a.This software is downloaded from home page of SHARP intranet.
http://172.24.145.13/tcg-qrc/prj/prj-e.asp
NAME:USB to Sirial Driver program.

STEP 1

Set-up for USB Serial Driver
(Refer to "Installation Process and advice.doc" file.)

STEP 2

Call the adjustment process mode, and select the sub-group "SPECIAL" and the adjustment item
"USB-MODE". Change the USB MODE value from 0 to 1.
(With this change, input of a 232C command becomes possible.)

STEP 3

Please connect the USB cable between the PC and the projector.

STEP 4

Please execute the program "TeraTerm".
(configuration file is to use attached Teraterm.ini.)

STEP 5

You write it by using the attached macro-file (serial_write.ttl).
A serial number is described in this macro-file. Enter this number.

STEP 6

Message will be appear as follows,

PG-M20S
PG-M20X

STEP 7

Please finish TeraTerm.

STEP 8

Please change the value from 1 to 0 for USB MODE in Special (Factory mode).
(For this change, input of a 232C command becomes invalid.)

<Attention >

After the installation for USB to 232C driver, select the 232C with SW2002 on the KEY unit.
Connect the USB cable, and change COM2 for teraterm(setup-serial port) then push "Enter" key
and confirm "ERR" message comes back.
If "ERR" comes back setting is correct. In case of "ERR" does not come back, COM2 is incorrect.
Please try COM3, COM4 by turn, and find correct COM port.

27

PG-M20S
PG-M20X

Checking of Basic Operation

TROUBLE SHOOTING TABLE

Does the POWER LED light up or
flicker in red or green?

Yes

Does the set operate by the set's
key or the remote controller's
power key?

Yes

Does the cooling fan rotate and
does the lamp light up?

Yes

Is the user menu displayed?

Yes

Does the RGB input operate
normally?

Yes

Does the video input operate
normally?

Yes

No

No

No

No

No

No

Go to "Checking of Power Unit".

Go to "Checking of Sub-microcomputer
and Its Periphery"

Go to "Checking of Lamp Lighting-up"

Check the formatter circuit and
its periphery.

Check IC8013 (AD) and go to
"Checking of RGB Input".

Check IC8015 and peripheral
circuit.

Do the component input/DVI input
operate normally?

Yes

Does the DVI input operate
normally?

Yes

End

No

No

Is there input signal at pins
(8), (17) and (23) of IC8013?

Go to "Checking of Video
Input". Is there input signal at
the emitter of Q8002?

Yes

Check IC8015 and its
peripheral circuit.

No

No

Check IC3852 and its
peripheral circuit.

Check IC3852 and its
peripheral circuit.

28

Checking of Power Unit

PG-M20S
PG-M20X

Are connectors in the power unit
completely inserted?

Yes

Is the lamp door closed
completely?

Yes

Does the temperature
fuse function?

Yes

Is AC voltage applied across relay
RL701?

Yes

No

No

No

No

Insert the connectors CN702,
CN704, CN7003, CN7001,
CN7004 and CN7101 completely.

Close the lamp door completely by
screws.

Replace the fuse as well as its
harness.

Replace F701.

Is there DC voltage of about 6V at
pin (1) of CN7002?

Yes

Is there DC voltage of about 370V
across CN702?

Yes

Is there rated voltage at the output
terminals of CN702 and CN7102?

Yes

Check the PWB circuits of relevant
output sides.

No

No

No

Check Q7501, Q7502 and Q7503
and their peripheral circuits. If any
circuit is damaged, replace it.

Check the circuits connected to the
primary side of T701. If any circuit
is damaged, replace it.

Check the circuits connected to the
secondary side of T701. If any
circuit is damaged, replace it.

29

PG-M20S
PG-M20X

Lamp failure to light up

(formatter unit)

Is any of the SC9001, SC9002,
P9002 and P9003 connectors
disconnected or in poor contact?

No

Is there the specified voltage at
pin (15) of SC9002?

Yes

Is there the 180-Hz pulse signal at
pin (1) of P9002?

No

Is there the 180-Hz pulse signal at
pin (2) of P9003 when no input
signal is given?

Yes

Is the signal at pin (10) of IC9101
at High level?

Yes

Yes

No

Yes

Yes

No

Yes

No

Insert the connectors completely.

Is there the specified voltage at
pin (11) of P3002?

Check the lamp and ballast unit.

Are there the specified voltages
at pins (23) and (24) of P3003 on
the input PWB?

Go to "Checking of PC I/F unit"

No

No

Check the fan circuit
(near IC2101) on the
KEY PWB.

Check the power unit.

Is the signal at pin (9) of IC9101
at High level?

Yes

Trouble with IC9101 or its
peripheral part.

No

No

Are the signals at pins (69) and
(70) of SC9001 at High level?

Yes

Trouble with IC9003.

30