Hitachi CP-X270W Manuel utilisateur

SERVICE MANUAL

CPX270W

SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT.

Multimedia LCD Projector

February 2001 Digital Media Systems Division

Contents

Caution

Be sure to read this manual before servicing. To assure safety from fire, electric shock, injury, harmful

radiation and materials, various measures are provided in this Hitachi Multimedia LDC Projector. Be sure to

read cautionary items described in the manual to maintain safety before servicing.

Service Warning

1. When replacing the lamp, avoid burns to your fingers. The lamp becomes too hot.

2. Never touch the lamp bulb with a finger or anything else. Never drop it or give it a shock. They may cause

bursting of the bulb.

3. This projector is provided with a high voltage circuit for the lamp. Do not touch the electric parts of power

unit, when turning on the projector.

4. Do not touch the exhaust fan, during operation.

5. The LCD module assembly is likely to be damaged. If replacing the LCD module assembly, do not hold

the FPC of the LCD module assembly.

1. Features -------------------------------------------------- 2

2. Specifications -------------------------------------------- 2

3. Names of each part ------------------------------------ 3

4. Adjustment ----------------------------------------------- 6

5. Troubleshooting ---------------------------------------- 12

6. Service points ------------------------------------------ 18

7. Block diagram ------------------------------------------ 25

8. Connector connection diagram --------------------- 26

9. Wiring diagram ----------------------------------------- 27

10.Basic circuit diagram ---------------------------------- 31

11.Disassembly diagram--------------------------------- 45

12.Replacement parts list-------------------------------- 47

13.Option parts list----------------------------------------- 48

14.Communication Data --------------------------------- 49

SM0511

ENGLISH

SAFETY PRECAUTIONS

WARNING: The following precautions must be observed.

ALL PRODUCTS

Before any service is performed on the chassis an

isolation transformer should be inserted between the

power line and the product.

1. When replacing the chassis in the cabinet, ensure

all the protective devices are put back in place.

2. When service is required, observe the original

lead dressing. Extra precaution should be taken to

ensure correct lead dressing in any high voltage

circuitry area.

3. Many electrical and mechanical parts in

HITACHI products have special safety related

characteristics. These characteristics are often not

evident from visual inspection, nor can the

protection afforded by them necessarily be

obtained by using replacement components rated

for higher voltage, wattage, etc. Replacement

parts which have these special safety

characteristics are identified by marking with a

! on the schematics and the replacement parts

list.

The use of a substitute replacement component

that does not have the same safety characteristics

as the HITACHI recommended replacement one,

shown in the parts list, may create electrical

shock, fire, X-radiation, or other hazards.

4. Always replace original spacers and maintain lead

lengths. Furthermore, where a short circuit has

occurred, replace those components that indicate

evidence of overheating.

5. Insulation resistance should not be less than 2M

ohms at 500V DC between the main poles and

any accessible metal parts.

6. No flashover or breakdown should occur during

the dielectric strength test, applying 3kV AC or

4.25kV DC for two seconds between the main

poles and accessible metal parts.

7. Before returning a serviced product to the

customer, the service technician must thoroughly

test the unit to be certain that it is completely safe

to operate without danger of electrical shock. The

service technician must make sure that no

protective device built into the instrument by the

manufacturer has become defective, or

inadvertently damaged during servicing.

CE MARK

1. HITACHI products may contain the CE mark on

the rating plate indicating that the product

contains parts that have been specifically

approved to provide electromagnetic

compatibility to designated levels.

2. When replacing any part in this product, please

use only the correct part itemised in the parts list

to ensure this standard is maintained, and take

care to replace lead dressing to its original state,

as this can have a bearing on the electromagnetic

radiation/immunity.

PICTURE TUBE

1. The line output stage can develop voltages in

excess of 25kV; if the E.H.T. cap is required to be

removed, discharge the anode to chassis via a

high value resistor, prior to its removal from the

picture tube.

2. High voltage should always be kept at the rated

value of the chassis and no higher. Operating at

higher voltages may cause a failure of the picture

tube or high voltage supply, and also, under

certain circumstances could produce X-radiation

levels moderately in excess of design levels. The

high voltage must not, under any circumstances,

exceed 29kV on the chassis (except for projection

Televisions).

3. The primary source of X-radiation in the product

is the picture tube. The picture tube utilised for

the above mentioned function in this chassis is

specially constructed to limit X-radiation. For

continued X-radiation protection, replace tube

with the same type as the original HITACHI

approved type

4. Keep the picture tube away from the body while

handling. Do not install, remove, or handle the

picture tube in any manner unless shatterproof

goggles are worn. People not so equipped should

be kept away while picture tubes are handled

LASERS

If the product contains a laser avoid direct exposure to

the beam when the cover is open or when interlocks are

defeated or have failed.

FRANÇAIS

CONSIGNES DE SECURITE

AVERTISSEMENT: vous devez respecter les précautions suivantes

POUR TOUS LES PRODUITS

Avant d’effectuer une intervention d’entretien sur le

châssis, vous devez insérer un transformateur d’isolement

entre la ligne d’alimentation électrique et le produit.

1. Lors de la remontage du châssis dans le coffret,

vérifiez que tous les dispositifs de protection sont

remis en place.

2. Lorsqu’une intervention d’entretien s’avère

nécessaire, respectez l’agencement d’origine des

conducteurs. Vous devez prendre des précautions

supplémentaires pour garantir un agencement correct

des conducteurs dans toutes les zones où des circuits

haute tension sont présents.

3. De nombreux composants électriques et mécaniques

des appareils HITACHI ont des caractéristiques

spéciales de sécurité. Bien souvent, ces

caractéristiques ne sont pas évidentes lors d’un

examen visuel et la protection qu’ils offrent n’est pas

forcément garantie si vous utilisez des composants de

rechange conçus, par exemple, pour une tension plus

élevée, une puissance plus forte. Les pièces de

rechange qui offrent des caractéristiques spéciales de

sécurité sont identifiées par un repérage comportant

le symbole ! sur les schémas et sur la

nomenclature des pièces de rechange.

L’emploi d’un composant de rechange qui ne

respecte pas les mêmes caractéristiques de sécurité

que la pièce de rechange que recommande HITACHI

et qui figure dans la nomenclature risque de

provoquer un choc électrique, un incendie, des rayons

X ou d’autres dangers.

4. Remettez toujours en place les entretoises d’origine

et respectez la longueur des conduites. En outre, à la

suite d’un court-circuit, remplacez les composants

présentant des signes de surchauffe.

5. La résistance d’isolement doit être supérieure ou

égale à 2 méga ohms à 500 V c.c. entre les pôles

principaux et des composants métalliques

accessibles, quels qu’ils soient.

6. Aucun claquage et aucune rupture ne doit se produire

pendant l’essai de résistance diélectrique à la suite de

l’application d’une tension de 3 kV c.a. ou de 4,35

kV c.c. pendant deux secondes entre les pôles

principaux et des composants métalliques

accessibles.

7. Avant de remettre au client un produit qui a fait

l’objet d’un entretien, le technicien qui s’est chargé

de cette intervention doit tester à fond cet ensemble

pour s’assurer qu’il ne présente aucun danger

opérationnel et aucun risque de choc électrique. Ce

technicien doit s’assurer qu’aucun des dispositifs de

protection intégrés à cet instrument par le fabricant

n’est défectueux ou n’a été endommagé de façon

accidentelle lors de l’entretien.

LABEL CE

1. Les produits HITACHI peuvent avoir reçu le label

CE qui figure sur la plaque signalétique pour indiquer

que cet ensemble contient des composants qui ont fait

l’objet d’une homologation spécifique de respect des

normes de compatibilité électromagnétique en

fonction de niveaux bien spécifiés.

2. Lors du remplacement d’un des composants de ce

produit, utilisez uniquement le composant correct

identifié dans la nomenclature afin de maintenir le

respect de cette norme ; en outre, vous devez

également ramener l’agencement des conducteurs à

son état d’origine car cela peut avoir une influence au

niveau des rayonnements électromagnétiques et sur la

protection contre ces rayons.

PICTURE TUBE

1. L’étage de sortie des lignes peut développer des

tensions de plus de 25 kV ; s’il faut retirer le chapeau

de protection contre les tensions extrêmement

élevées, il convient de décharger l’anode contre le

châssis par le biais d’une résistance de forte valeur

avant de déposer ce chapeau du tube image.

2. La haute tension doit toujours se maintenir à la valeur

nominale du châssis et ne pas dépasser cette dernière.

Un fonctionnement à des températures élevées peut

provoquer une défaillance du tube image ou l’entrée

d’une tension élevée. Dans certains cas, cela peut

même provoquer des rayons X d’un niveau

légèrement supérieur aux valeurs de calcul. Cette

haute tension ne doit en aucun cas dépasser 29 kV sur

le châssis (à l’exception des téléviseurs de

projection).

3. La principale source de rayons X de cet appareil est

le tube image. Le tube image employé pour assurer la

fonction susmentionnée dans ce châssis est

spécialement construit pour limiter des rayons X.

Pour maintenir cette protection contre les rayons X, il

faut remplacer le tube d’origine d’un type agréé par

HITACHI par un autre tube de même type.

4. Lors des manipulations, ne tenez jamais le tube

image contre le corps. Pendant toutes les opérations

d’installation, de dépose et de manipulation de ce

tube image, quelle que soit la méthode employée,

vous devez toujours porter des lunettes de sécurité

anti-éclatements. Les personnes qui ne portent pas ce

type de lunettes doivent se tenir à l’écart du tube

image lors de la manipulation de ce dernier.

RAYONS LASER

Si ce produit contient un rayon laser, évitez toute

exposition directe à ce faisceau lors de l’ouverture du

couvercle ou lors de l’élimination des verrouillages de

sécurité ou après défaillance de ces verrouillages.

DEUTSCH

SICHERHEITSVORKEHRUNGEN

WARNUNG: Die folgenden Vorkehrungen müssen eingehalten werden.

ALLE PRODUKTE

Bevor die Grundplatte gewartet wird, sollte ein Trenntrafo

zwischen die Netzleitung und das Produkt eingebracht

werden.

1. Wenn die Grundplatte in das Gehäuse zurückgestellt

wird, stellen Sie sicher, dass alle

Schutzvorrichtungen wieder an ihrem Ort sind.

2. Wenn Wartung erforderlich ist, halten Sie die

originale Verdrahtungsart ein. Besondere Vorsicht ist

nötig, um die korrekte Verdrahtungsart in jedem

Hochspannungsstromkreis zu gewährleisten.

3. Viele elektrische und mechanische Teile von

HITACHI Produkten haben besondere

sicherheitsbezogene Eigenschaften. Diese

Eigenschaften fallen oft nicht ins Auge, aber der

durch sie gewährte Schutz kann nicht unbedingt

erreicht werden, wenn man Ersatzteile benutzt, die

für höhere Spannung, Leistung usw. ausgelegt sind.

Ersatzteile, die diese besonderen

Sicherheitsmerkmale haben, sind in den

Prinzipskizzen und Ersatzteillisten an einem ! zu

erkennen.

Der Gebrauch von Ersatzteilen, die nicht dieselben

Sicherheitsmerkmale haben wie die empfohlenen

HITACHI Ersatzteile, wie sie in der Ersatzteilliste

aufgeführt sind, kann zu elektrischem Schlag, Feuer,

Röntgenstrahlung und anderen Gefahren führen.

4. Immer die originalen Abstandsstücke ersetzen und

die Leitungslängen beibehalten. Wo ein Kurzschluss

passiert ist, die Teile ersetzen, bei denen Überhitzung

nachzuweisen ist.

5. Der Isolierwert sollte bei 500 V Gleichstrom

zwischen den Hauptpolen und allen zugänglichen

Metallteilen nicht unter 2M Ohm liegen.

6. Bei der Prüfung auf Durchschlagsfestigkeit sollte

kein Überschlag oder Durchschlag vorkommen,

wenn zwei Sekunden lang 3 kV Wechselstrom oder

4,25 kV Gleichstrom zwischen den Hauptpolen und

allen zugänglichen Metallteilen angelegt wird.

7. Bevor das gewartete Produkt dem Kunden

zurückgegeben wird, muss der Wartungstechniker

das Gerät gründlich prüfen, um sicherzustellen, dass

es betriebssicher ist ohne das Risiko eines

elektrischen Schlages. Der Wartungstechniker muss

sicherstellen, dass keine vom Hersteller im Gerät

eingebaute Schutzvorkehrung schadhaft geworden ist

oder bei der Wartung unabsichtlich beschädigt

wurde.

CE KENNZEICHEN

1. HITACHI Produkte enthalten eventuell das CE

Kennzeichen auf dem Leistungsschild, welches

angibt, dass das Produkt Teile enthält, die eigens

zugelassen sind, um bis zu einem spezifizierten

Niveau elektromagnetische Störfreiheit zu bewirken.

2. Wenn Sie irgendein Teil in diesem Produkt ersetzen,

benutzen Sie bitte nur das korrekte Teil, das in der

Ersatzteilliste aufgeführt ist, um sicherzustellen, dass

dieser Standard eingehalten wird, und geben Sie acht,

die Verdrahtungsart in ihren ursprünglichen Zustand

zurück zu versetzen, weil das einen Einfluss auf die

elektromagnetische Abstrahlung/Störsicherheit haben

kann.

BILDRÖHRE

1. Die Leitungsausgangsstufe kann Spannungen von

mehr als 25 kV entwickeln; wenn die

Höchstspannungskappe entfernt werden muss,

entladen Sie die Anode zum Gehäuse über einen

hochohmigen Widerstand, bevor Sie sie aus der

Bildröhre entfernen.

2. Hochspannung sollte immer auf den festgelegten

Wert des Gehäuses beschränkt bleiben und nicht

mehr. Betrieb bei höherer Spannung kann zum

Versagen der Bildröhre oder zu hoher

Spannungszufuhr führen und kann unter Umständen

auch Röntgenstrahlung hervorbringen, die leicht über

dem Konstruktionsniveau liegt. Die Hochspannung

darf auf keinen Fall 29 kV am Gehäuse überschreiten

(außer bei Projektionsfernsehern).

3. Die Hauptquelle der Röntgenstrahlung im Produkt ist

die Bildröhre. Die Bildröhre, die für die oben

erwähnte Funktion in diesem Gehäuse benutzt wird,

ist eine Spezialkonstruktion zur Begrenzung der

Röntgenstrahlung. Um den Schutz vor der

Röntgenstrahlung zu behalten, ersetzen Sie bitte die

Röhre durch denselben Typ wie den ursprünglichen

von HITACHI zugelassenen.

8. Halten Sie die Bildröhre bei der Handhabung vom

Körper weg. Sie dürfen die Bildröhre nur dann

installieren, entfernen oder handhaben, wenn Sie eine

nicht splitternde Schutzbrille tragen. Personen ohne

derartigen Schutz sollten ferngehalten werden,

solange Bildröhren gehandhabt werden.

LASER

Wenn das Produkt einen Laser enthält, setzen Sie sich

keinesfalls direkt dem Strahl aus, wenn die Abdeckung

geöffnet ist oder wenn die Verriegelung versagt.

-- 2 --

CP-X270W

1. Features

High brightness, High resolution

Compact size, light weight for portability

RS232C Communication

Complies with VESA DDC1/2B specifications

Auto-adjustment function

2. Specifications

Liquid crystal

panel

Drive system TFT active matrix

Panel size 0.7 inches

Number of pixels 1024 (H) × 768 (V)

Lamp 130W UHB

Video input

System NTSC, 4.43NTSC, PAL, M-PAL, PAL60, N-PAL or SECAM

Level

Composite

Y/C

1.0Vp-p (75 termination)

Y : 1.0Vp-p (75 termination)

C : 0.286Vp-p (NTSC burst signal, 75 termination)

0.3Vp-p (PAL/SECAM burst signal, 75 termination)

RGB input

Video signal

Analog RGB input

0.7Vp-p (75 termination)

Sync signal

H/V separate

TTL level

Audio input 200mVrms, 47k

Speaker output 1W (mono)

Power supply AC100~120V/2.0A, AC220~240V/0.9A

Power consumption 200W

Dimensions 289 (W) × 84 (H) × 210 (D) mm (expect foot adjuster)

Weight 2.4kg (6.4lbs)

Temperature range

Operation

Storage

: 0~35°C

: -20~60°C

Accessories

Remote control transmitter × 1

RGB cable × 1

Video cable × 1

Audio cable (Stereo Mini) × 1

POWER cord × 3

Battery

(in side Remote control transmitter)

×1

Carrying bag × 1

User's manual

(with Safety Instructions)

×1

-- 3 --

CP-X270W

3. Names of each part

Part names

S-VIDEO Terminal

RGB IN Terminal

CONTROL Terminal

VIDEO Terminal

RESET Button

MUTE Button

INPUT Button

STANDBY/ON Button

Foot Adjuster Button

Air Filter and Intake

(for the Cooling Fan)

Speaker

Rear Foot Adjuster

LAMP Indicator

TEMP Indicator

POWER Indicator

MENU Button

Ventilation Openings

(exhaust)

Terminal Panel (Refer below)

Remote Control Sensor

LAMP COVER

AUDIO IN Terminal

Power Switch

AC Inlet

(to the Power Cord)

Ventilation Openings

(Intake)

Zoom Knob

Focus Ring

Remote Control Sensor

Lens

Slide Lens door

Foot Adjuster

Control Panel

FRONT/LEFT VIEW OF THE PROJECTOR

REAR/RIGHT VIEW OF

THE PROJECTOR

TERMINAL PANEL

-- 4 --

CP-X270W

CAUTION

Danger of explosion if battery is incorrectly replaced.

Be careful in handling the battery according to instructions of the accompanying manual “SAFETY

INSTRUCTIONS” and this manual.

Replace only with the same or equivalent type recommended by the manufacturer.

Use the 3V micro lithium battery type no. CR2025 only.

When you dispose the battery, you must obey the law in the relative area or country.

Keep the battery away from children and pets.

STANDBY/ON Button

Button

MENU Button

MAGNIFY Button

MAGNIFY

Button

AUTO Button

TIMER Button

Battery Holder

VIDEO Button

RGB Button

MENU SELECT Button

RESET Button

POSITION Button

VOLUME Button

VOLUME

Button

FREEZE Button

MUTE Button

BLANK Button

REMOTE CONTROL TRANSMITTER

Loading the Battery

First Loading:

In original packing, the battery is installed in the battery holder of the

remote controller with protection film(the transparent filmsome of

which is inside the battery folder). Pull out the protection film to load

the battery.

Replacing:

1. See the reverse side of the remote controller.

2. Pinch the groove and pull out battery holder as the drawing right.

3. Remove the worn battery.

4. Install the new battery with “+” side facing.

5. Push in and click the battery holder.

“+” side

Pull out

Battery Holder

-- 5 --

CP-X270W

Function for service

Function

Displayed the operating time of the lamp

Reset the operating time of the lamp

Displayed the operating time of the projector

When replacing the lamp, Reset the operating time of lamp.

Operation

Press the RESET button of the projector or the TIMER

button of the remote control, for 3 seconds.

Press the RESET button of the projector or the remote

control MENU.

(During be displayed the operating time of the lamp.)

Press the MUTE button of the projector or the remote

control, for 3 seconds.

(During be displayed the operating time of the lamp.)

Reset the lamp timer :

Please carry out the following operation within 10 minutes from power on, if you replaced the lamp after 2,000 hours.

1) Press the RESET button on projector for 3 seconds or

remote control transmitter TIMER button for 3 seconds and

display the total lamp used time.

2) Press the RESET button on projector or remote control

transmitter MENU ON button during displaying the lamp

used time.

3) Select the “0” on the screen using the MENU ( ) button or

DISK PAD.

2 3

1

1,2

3

LAMP 1700 hr

LAMP 1700 0 CANCEL

-- 6 --

CP-X270W

4 - 2 Ghost adjustment

Signals for internal adjustment

30%

96/255

bit

0/255

bit

Adjustment procedure

1. Use DAC-P - GHOST-W: in the Adjustment menu to

adjust so that ghost is at a minimum.

(Set the adjustment value to 16, then raise the

value. When a ghost appears to the left of a vertical

line, reduce the value by 2 steps.)

4 - 3 Flicker adjustment (V.COM adjustment)

Signals for internal adjustment Adjustment procedure

1.Make this adjustment after completing the

adjustment in 4-2 Ghost adjustment.

2. Use DAC-P - V.COM - R: in the Adjust menu to

adjust so that the flicker at the center of the screen

is less than the flicker at the periphery.

(When the flicker is about the same across the

whole screen, adjust so that the flicker at the center

of the screen is somewhat less than elsewhere.)

If flicker adjustment is completed, [MENU SELECT]

button of the Remote control transmitter will be

pressed and it will change to a screen for the

vertical band adjustment.

When the vertical band is conspicuous, adjust to the

best point by less than 3 points from flicker

adjustment value.

3. In the same way, use DAC-P - V.COM - G: in the

Adjustment menu to adjust the G color flicker.

4. In the same way, use DAC-P - V.COM - B: in the

Adjustment menu to adjust the B color flicker.

4. Adjustment

4 - 1 Before adjusting

1. Before starting adjustment, warm up the projector

for about 10 min. (Blank white)

2. Set Zoom Wide to Max. and project an image a

distance of 40 inches.

3. Normalizing the video adjustment.

(Press the [MENU] button of the Remote control

transmitter to display the Setup menu, then press

the [RESET] button.)

*note :

The setup menu is not displayed on with no signal.

4. Perform all adjustments from the Adjustment menu.

Perform the following operations to display the

Adjustment menu.

a. Press the [MENU] button of the Remote control

transmitter (the Setup menu will appear).

b. Next, press the [RESET] button for 5 sec. or

more (the Adjustment menu will appear).

-- 7 --

CP-X270W

4 - 4 - 1

PSIG G adjustment

(vertical stripe adjustment)

Signals for internal adjustment

43&white

96/255bit

Adjustment procedure

1.Make this adjustment after completing the

adjustment in 4-3 Flicker adjustment.

2. Use DAC-P - PSIG - G: in the Adjust menu to adjust

so that the vertical lines spaced every 6 dots are as

inconspicuous as possible.

4 - 4 - 2

PSIG B adjustment

(vertical stripe adjustment)

Signals for internal adjustment

30%

48/255

bit

0/255

bit

Adjustment procedure

1. Use DAC-P - PSIG - B: in the Adjust menu to adjust

so that the vertical lines are as inconspicuous as

possible.

4 - 5 White balance adjustment

1. Perform these adjustments after the PSIG

adjustment described in Section 4-4.

2. First, adjust the G color.

3. Place the cursor on Slide Show in the Adjust menu

[A/D], press the [ ] key three times to display G

monochrome and adjust the illuminance at the

center of the screen. Make a note of the setting

(here assumed to be A [lx]). Press the MENU key

to return.

4. Adjust Gamma 86% and G: in the Adjust menu so

that illuminance (Y) at the center of the screen is

adjusted as follows.

Y = A x 0.712 40 [lx]

5. Adjust Gamma, 43% and G: in the Adjust menu so

that illuminance (Y) at the center of the screen is

adjusted as follows.

Y = A x 0.155 15 [lx]

6. Adjust Gamma, 29% and G: in the Adjust menu so

that illuminance (Y) at the center of the screen are

adjusted as follows.

Y = A x 0.064 5 [lx]

7. Adjust Gamma, 14% and G: in the Adjust menu so

that illuminance (Y) at the center of the screen is

adjusted as follows.

Y = A x 0.014 1 [lx]

8. Adjust Gamma 0% and G: in the Adjust menu so

that illuminance (Y) at the center of the screen is

adjusted as follows.

Y = A x 0.005 0.1 [lx]

9. Now, adjust the R and B colors.

10.Place the cursor on [A/D] - [SLIDE SHOW] in the

ADJUST menu and press the [ ] key once to

display a white screen. Then measure the color

coordinates at the center of the screen and take a

note of the setting (here assumed to be x1, y1).

Press the [MENU] key to return.

11.Adjust Gamma, 86%, R: and B: so that the color

coordinates (x, y) at the center of the screen take

on the following values.

x = (x1 - 0.005) 0.003

y = (y1 - 0.010) 0.005

-- 8 --

CP-X270W

12.Adjust Gamma, 43%, R: and B: so that the color

coordinates (x, y) at the center of the screen take

on the following values.

x = (x1 - 0.005) 0.003

y = (y1 - 0.015) 0.005

13.Adjust Gamma, 29%, R: and B: so that the color

coordinates (x, y) at the center of the screen take

on the following values.

x = (x1 - 0.010)

0.003

y = (y1 - 0.020) 0.005

14.Adjust Gamma, 14%, R: and B: so that the color

coordinates (x, y) at the center of the screen take

on the following values.

x = (x1 - 0.015)

0.003

y = (y1 - 0.025) 0.005

4 - 6 Color uniformity adjustment

Preparations

1. Perform these adjustments after the white balance

adjustment described in Section 4-5.

2. Make a color uniformity adjustment for the following

three tones.

MIN tone (approx. 11% input signal)

MID tone (approx. 46% input signal)

MAX tone (approx. 71% input signal)

(Note that the MIN tone need not be adjusted when there is

no conspicuous color shading during a black signal input.)

3. Place the cursor on the tone to be adjusted in the

Adjust menu and press the [ ] key. This displays

the Adjust Tone menu at the bottom of the screen.

Select the major adjustment lattice point No. and

color, then adjust them.

4. The major adjustment lattice point numbers (a total

of 17 points) corresponds to the major adjustment

lattice point positions in the diagram on the right.

The color uniformity of the entire screen can be

adjusted by adjusting the white balance for each of

the points starting in order from the low numbers.

5. Adjustment point No. 1 should not be adjusted,

because it controls the brightness of the entire screen.

6. To temporarily turn correction off, place the cursor

on ON in the Adjust Tone menu and press the [ ]

key. To turn it on again, place the cursor on OFF in

the Adjust Tone menu and press the [ ] key.

7. Although this adjustment can also be made using

internal signals, we will here use the [MENU

SELECT] key on the Remote control transmitter to

select the following two signals.

Solid monochrome adjustment color (use G color

adjustment when a color differential meter is

used)

Solid white (use for adjustment other than above)

8. Reset color shading correction before adjustment.

When 3 tones and all colors are to be reset, place

the cursor on [C. UNIF]. in the Adjust menu, press

the [RESET] key and select [DEFAULT].

When only 1 tone is to be reset, place the cursor

on the tone to be reset press the [RESET] key

and select [DEFAULT].

Single tone and monochrome resets cannot be

performed.

Adjustment operations (reference)

86% operation

014 29 43 86100

Brightness

Adjustment

point

Input signal (%)

014 29 43 86100

43% operation

Brightness

Adjustment

point

Input signal (%)

014 29 43 86100

14% operation

Brightness

Adjustment point

Input signal (%)

014 29 43 86100

0% operation

Brightness

Adjustment

point

Input signal (%)

014 29 43 86100

29% operation

Brightness

Adjustment

point

Input signal (%)

-- 9 --

CP-X270W

Adjust menu

VIDEO

ON

DAC-P GAMMAC. UNIF.

No. 1

R 0

LEVEL

MIN MID MAX

OFF

G 0 B 0

Adjust Tone menu

Major adjustment lattice point No.

Major adjustment lattice point position

14 12

13

16

15 17

6 4 8

2 1 3

7 5 9

10 11

V/6

H/6 H/3 H/3 H/6

V/3

V/6

Adjustment procedure 1

(when a color differential meter is used)

1. First adjust [MIN] tone [G:].

Unless there is conspicuous black uniformity, there is no

need to adjust. (Go to step 7 if no adjustment is required.)

2. Select adjustment point [No. 2] [G:].

When the background is [G] monochrome, press

the [MENU SELECT] key on the Remote control

transmitter to change to solid white.

3. Adjust the color coordinates of adjustment point

[No. 1] and make a note of them.

Assume that they are x = x1, y = y1.

Note : When the CL-100 color and color difference

meter is used, the [ ](delta) mode is

convenient. When adjustment point [No. 1]

color coordinate has been selected, set the

slide switch on the side to [ ](delta) while

holding down the [F] button on the front panel.

The measurement shown after this displays

the deviation from measurement point 1.

4. Now measure the color coordinates of measure-

ment point [No. 2] and adjust [No. 2] and [G:] so

that the color coordinates are as follows.

y = y1 0.050 (adjust Y only)

Similarly, measure adjustment points [No. 3] to [No.

9] and adjust their color coordinates starting in

order from the small number points.

5. Then adjust [MAX] tone [G].

Select [No. 2] [G:]. If the background is white solid,

press the [MENU SELECT] key on the Remote

control transmitter to change to [G] monochrome.

6. Measure the illuminance of measurement point

[No. 2] and [No. 3]. Temporarily set [No. 2] to

illuminance Y2 and [No. 3] to illuminance Y3 [lx].

7. Adjust the illuminance of measurement point [No.

2] and [No. 3] to their average values. Thus

illuminance Y2' and Y3' of measurement points

[No. 2] and [No. 3] should be the following after

adjustment.

Y2' = Y3' = (Y2 + Y3) 2 10 [lx]

8. Next, measure the illuminance of measurement

point [No. 10] and [No. 11].

Adjust the illuminance of measurement point [No.

10] and [No. 11] to their average values. Thus

illuminance Y10' and Y11' of measurement points

[No. 10] and [No. 11] should be the following after

adjustment.

Y10' = Y11' = (Y10 + Y11) 2 10 [lx]

This completes [G] color adjustments.

9. Then adjust [MAX] tone [R] and [B].

Select [No. 2] [B:] and press the [MENU SELECT]

key on the Remote control transmitter to change to

solid white.

10.Adjust the color coordinates of adjustment point

[No. 1] and make a note of them.

Assume that they are x = x1, y = y1.

11.Now measure the color coordinates of measure-

ment point [No. 2] and adjust [No. 2] [R:] and [B:]

so that the color coordinates are as follows.

x = x1 0.010, y = y1 0.020

Similarly, measure adjustment points [No. 3] to [No.

9] and adjust their color coordinates starting in

order from the small number points.

-- 10 --

CP-X270W

12.Then measure the color coordinates for adjust-

ment point [No. 10] and adjust [No. 10] [R:] and [B:]

so that the color coordinates are as follows.

x = x1 0.010, y = y1 0.020

Similarly measure adjustment points [No. 11] to

[No. 17] and adjust their color coordinates starting

in order from the small number points.

13.This completes [MAX] tone adjustments.

14.Now make similar adjustments for [MID] tone.

(Note that [G] color adjustment tolerance is 10

[lx].)

Adjustment procedure 2 (visual inspection)

1. First adjust [MIN] tone [G:].

Unless there is conspicuous black shading, there is

no need to adjust. (Go to step 4 if no adjust-ment is

required.)

2. Adjust only [G:] of measurement points [No. 2] to

[No. 17] in number order to minimize color shading.

(Use the deviation range information for each

measurement point given below as reference.)

3. This completes [MIN] tone adjustments.

4. Then adjust [MAX] tone [G] color.

5. Select [No. 2] [G:].

If the background is [G] monochrome, press the

[MENU SELECT] key on the Remote control

transmitter to change to solid white.

6. View measurement point [No. 2] and [No. 3]. Lower

the [G] color intensity only of the color point whose

[G] color is more intense than measure-ment point

[No. 1].

7. View measurement point [No. 10] and [No. 11].

Lower the [G] color intensity only of the color point

whose [G] color is more intense than measure-

ment point [No. 1], and raise the intensity of the

point whose color intensity is lower than measure-

ment point [No. 1].

8. This completes adjustments for [MAX] tone [G].

9. Now adjust the [MAX] tone for colors [R] and [B].

10.View measurement points [No. 2], [No. 3], [No. 10]

and [No. 11]. Adjust the [R] and [B] of each

measurement point so that they have the same

color as measurement point [No. 1].

Adjustment technique :

First, adjust [B:] of the point whose color is to be

adjusted so that it approximates that of [No. 1]. If

[R:] is low at this time, the image will have cyan

cast, in which case [R:] is increased. On the other

hand, if [R:] is excessive, the image will have a

magenta cast, in which case [R:] is decreased.

Overall, a cyan cast makes it easy to see color

shading.

11.Next, view measurement points [No. 4], [No. 5],

[No. 12] and [No. 13] and make similar adjust-

ments.

12.Then adjust measurement points [No. 6], [No. 7],

[No. 8], [No. 9], [No. 14], [No. 15], [No. 16] and [No.

17]. This completes the [MAX] tone adjustment.

13.Make similar [MID] adjustments as described in

steps 4 to 12 above.

-- 11 --

CP-X270W

8

3

16

17

9

11

6

14

2

12

15 13

10

7

4

1

5

8

3

16

17

9

11

14 12

15 13

10

4

1

5

6

2

7

8

3

16

17

9

11

6

2

12

13

14

15

10

7

4

1

5

14 12

15 13

10

4

1

5

6

2

7

8

3

16

17

9

11

17

9

15 13

7

5

3

17

9

11

15 13

10 1

5

6

2

7

8

16

17

9

6

12

13

7

4

5

14 12

10

4

1

6

2

8

3

16

17

9

113 11210 1

1614 12

86 4 84

1614 12

3 112

14

15

10 1

5

7

15 13

17

9

15 13

7

5

3

17

9

11

6

17

9

6

13

7

5

14 12

10

46

2

8

16

3 11210 1

1614 12

86 4 84

1614 12

3 112

14

15

10

5

7

15

10 12

1315

5

7

12

4

1

8

1713

1 3 11

16

95

17

9

15 13

7

5

3

17

9

11

6

17

9

6

13

7

5

14 12

10

46

2

8

16

3 112 1

1614 12

84 84

1614 12

32

14

15

10

5

7

15

10 12

13

5

7

12

4

1

17

13

1 3

5

11

9

11

8

16

15

10

6

No. 2 deviation range No. 10 deviation range No. 3 deviation range No. 11 deviation range

No. 4 deviation range No. 12 deviation range No. 5 deviation range No. 13 deviation range

No. 6 deviation range No. 7 deviation range No. 8 deviation range No. 9 deviation range

No. 14 deviation range No. 15 deviation range No. 16 deviation range No. 17 deviation range

-- 12 --

CP-X270W

5. Troubleshooting

Check points at trouble shooting

1

4

24

1

141

12

13

E804

I303

E800E302

E101

135

70

36

PWB ass'y Drive

TSW

CH1G

CH1B

CH1R

TP85

TP86

CHD3

CHC1

CHA14

CHA15

CHB14

CHB9

CHD12

CHC13

CHD8

-- 13 --

CP-X270W

P

o

w

e

r

ca

n n

o

t

be

t

u

rn

ed

o

n

Ar

e

volta

g

e input

Drive at standby

y

mode?

: +1

6

V

: +1

9V

:

+

7V

: +4.

5V

Power unit

(

circuit

)

Fus

e

on Power unit

(

circuit

)

N

O

YE

S

D

i

sco

nn

ec

t

T

S

W form Power unit

(

circuit

)

. And check

T

S

W short o

r

o

p

en

?

P

W

B ass'

y

Driv

e

S

hor

t

T

S

W

O

p

e

n

What is the state of TEMP

P

in

d

i

ca

t

o

r

?

Not li

g

h

t

DC FAN

(

EXHAUST

)

B

link

s

PWB ass'

y

SENSO

R

What is the state of LAMP

P

in

d

i

ca

t

o

r

?

Not li

g

h

t

B

link

s

2

3

4

5

3

4

5

I

s

th

e

LAMP

co

nn

ec

ti

o

n

?

OK

S

et the LAMP a

g

ai

n

H

(

More than 6V

)

M

easu

r

e

voltage at the of

4

E804 on the PWB ass'y

d

riv

e.

L

(

OV

)

Limit

S

W

P

W

B ass'

y

Driv

e

Is the LAMP

CO

VER

se

t

?

OK

S

et the LAMP

CO

VE

R

N

G

N

G

-- 14 --

CP-X270W

Lamp does not li

g

ht

W

h

a

t i

s

th

e

s

t

a

t

e

of

LAMP in

d

i

ca

t

or

durin

g

operation

?

Power unit

(

ballast

)

L

am

p

Is pin of EBAR

on the P

W

B ass'

y

D

riv

e

se

t t

o

"H"

?

P

W

B ass'

y

Driv

e

Power unit

(

ballast

)

Li

g

ht

Not li

g

ht

N

O

YE

S

N

O

YE

S

"H" =

3

.

3V

Chan

g

e the lamp

.

D

oes lamp li

g

ht

?

Power unit

(

circuit

)

Not ligh

t

Li

g

ht

W

h

a

t i

s

th

e

s

t

a

t

e

of

TEMP in

d

i

ca

t

o

r

?

Not li

g

h

t

B

link

s

PWB ass'

y

Driv

e

DC

FA

N

(

INTAKE A/B

)

H

(

3.3V

)

L

(

OV

)

1

M

easu

r

e

sure volta

g

e at

the of I303 on the PWB

ass'

y

Drive

.

7

C

onnect

E302

(

for PWB

ass'

y

SENSOR

)

D

oes disconnect

E302

(

for PWB ass'

y

S

ENSOR

)

?

-- 15 --

CP-X270W

Picture is not displa

y

ed onl

y

when the RGB si

g

nal is input

Are si

g

nal

in

p

ut at each

p

in of

E1

0

1 on the PWB

ass'

y

Drive

?

P

W

B ass'

y

Driv

e

PWB ass'

y

Si

g

nal

P

o

w

e

r

u

ni

t

(

circuit

)

YE

S

N

O

Check at operatin

g

mod

e

35

36

-- 16 --

CP-X270W

Picture is not displa

y

ed onl

y

when the VIDEO Signal is input

Power unit

(

circuit

)

N

O

YE

S

Ar

e

E

800

on the PWB

ass'

y

Drive

?

: +1

6V

:

+

7V

: +4.

5V

P

W

B ass'

y

Driv

e

LCD module ass'

y

Are si

g

nal

in

p

ut at these

p

ins of E101 on the

P

W

B ass'

y

D

riv

e?

N

O

YE

S

PWB ass'

y

Si

g

nal

Check at operatin

g

mod

e

5

2

4

3

4

: (CHD8) : VIDEO. YUV4:2:2 Y LSB (Digital)

12

59

-- 17 --

CP-X270W

Power unit

(

circuit

)

PWB ass'

y

Si

g

na

l

S

p

eake

r

Check at operatin

g

mod

e

N

o

sou

n

d

C

an not control to R

S

2

3

2

C

Ar

e

the si

g

nals

in

p

ut at each

p

in o

f

E101 on the PWB ass'

y

D

riv

e?

P

W

B ass'

y

D

riv

e

YE

S

PWB ass'

y

Si

g

na

l

N

O

(

CHD3

)

: TX

D

(

CHC1

)

: RX

D

Pin N

o

R

S

2

3

2

C

1

2

3

6

7

9

1

0

1

2

1

3

1

4

S

EL

0

RT

S

G

ND

RDP

TDP

Check at operatin

g

mod

e

9

62

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Hitachi CP-X270W Manuel utilisateur

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