Hitachi cpx990w Service Manual

No.0522E

CP-X990W

SERVICE MANUAL

Caution

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

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

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

Service Warning

1. When replace the lamp, to avoid burns to your ngers. The lamp becomes too hot.

2. Never touch the lamp bulb with a nger 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 (main), when turn on the projector.

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

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

the FPC of the LCD module assembly.

(P4X2)

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

2. Specications--------------------------------------------- 2

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

4. Adjustment ------------------------------------------------ 7

5. Troubleshooting ---------------------------------------- 14

6. Service points ------------------------------------------ 20

7. Block diagram ------------------------------------------ 24

SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT.

8. Wiring diagram ----------------------------------------- 25

9. Basic circuit diagram---------------------------------- 29

10.Connector connection diagram -------------------- 77

11.Disassembly diagram--------------------------------- 79

12.Replacement parts list ------------------------------- 81

13.RS-232C communication ---------------------------- 82

Multimedia LCD Projector

February 2002 Digital Media Systems Division

CP-X990W

Liquid crystal

panel

Lamp

Video input

Drive system

Panel size

Number of pixels

System

Level

System

Level

RGB

Audio

Speaker output

Power supply

Power consumption

Dimensions

Weight

Temperature range

Accessories

Digital input

Input

Output

Analog input/output

TFT active matrix

1.3 inches

1024 (H) × 768 (V)

275W UHB

Composite

Component

Y/C

NTSC, 4.43NTSC, PAL, M-PAL, SECAM (N-PAL : only compulsion mode)

480i, 480p, 625I, 720p, 1080i

Y 1.0Vp-p (75 termination)

Cb/Cr 0.7Vp-p (75 termination)

Pb/Pr 0.7Vp-p (75 termination)

Type T.M.D.S

Video signal DC:150~1200mV, AC:1.56Vp-p

Sync signal TTL level

Type R.G.B separate

Video signal 0.7Vp-p (75 termination)

Sync signal H/V separate or composite, TTL level

200mVrms, 50k or less

0~200mVrms, 1k

1.2W + 1.2W (stereo)

AC100~120V/4.7A, AC220~240V/2.0A

440W

308.5 (W) × 144 (H) × 395 (D) mm

6.5kg (14.3lbs)

Operation : 0~35°C

Storage : -20~60°C

Remote control transmitter × 1 RGB cable × 1 Mouse cable × 1 Component cable × 1

Composite

Y/C

1.0Vp-p (75 termination)

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

Y : 1.0Vp-p (75 termination)

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

POWER cord × 3 BATTERIES LR6 × 2

User's manual (with Safety Instructions)× 1

1. Features

High brightness, High resolution

Compact size, light weight for portability

RGB output terminal

RS-232C Communication

Mouse emulation

Power zoom and power focus functions

Complies with VESA DDC1/2B specifications

Auto-adjustment function

2. Specifications

3. Names of each part

Control Panel

Front/Right View

Rear/Left View

Terminal Panel

(Refer below)

Terminal Panel

DVI Terminal

S-VIDEO Terminal

VIDEO Terminal

AUDIO(MONO)/L

Terminal

AUDIO R Terminal

USB Terminal

AUDIO IN AUDIO

OUT

RGB 1

DVI

RGB 2

RGB OUT

CONTROL

RGB IN 2

COMPO

NENT

VIDEO

S-VIDEO

VIDEO

(MONO)/L

AUDIO

B/PB

R/PR

DVI

USB

ZOOM

FOCUS

KEYSTONE INPUT

POWER TEMPLAMP

STANDBY/ON

RESET

ZOOM Button

KEYSTONE Button

STANDBY/ON Button

LAMP Indicator

POWER Indicator

FOCUS Button

INPUT Button

MENU Button

RESET Button

TEMP Indicator

Remote Control Sensor

Lens

Filter Cover

( Air Filter )

Foot Adjuster

Lens Cap

Control Panel Ventilation Openings

(exhaust) Carrying Handle Filter cover

Air Filter and Intake for the Cooling Fan

Foot Adjuster

Remote Control Sensor

Speaker

Power Switch

AC Inlet

(to Power Cord)

RGB IN 1 Terminal RGB IN 2 Terminal

RGB OUT Terminal

CONTROL Terminal AUDIO IN RGB1/DVI Terminal

AUDIO IN RGB2 Terminal AUDIO OUT Terminal

COMPONENT VIDEO Y Terminal CB/PB Terminal C

R/PR Terminal

( )

Parts names

CP-X990W

REMOTE CONTROL TRANSMITTER

• Keep the remote control transmitter away from children and pets.

• Do not give the remote control transmitter any physical impact. Take care not to drop.

• Do not place the heavy objects on the remote control transmitter.

• Do not wet the remote control transmitter or place it on any wet object.

• Do not place the remote control transmitter close to the cooling fan of the projector.

• Do not disassemble the remote control transmitter.

NOTE

ZOOM Button

These functions works when the mouse control function is activated. Remember, the POSITION,

BLANK ON and MENU ON functions disable the mouse control function.

WARNING • The laser pointer of the remote control transmitter is used in place of a finger or rod. Never look directly into the laser beam outlet or point the laser beam at

other people. The laser beam can cause vision problems.

CAUTION • Use of controls or adjustments or performance of procedures other than those specified herein may result in hazardous radiation exposure.

FOCUS Button

ZOOM

FOCUS

LASER

BLANK

RGB

VIDEO

AUTO

MENU SELECT

KEYSTONE

ESET

FREEZE

PinP

MAGNIFY

POSITION

OFF

VOLUME

MUTE

Complies with 21 CFR 1040. 10 and 1040. 11 except for deviations pursuant to Laser Notice No.50, dated 2001.7.26 SMK CORPORATION 6-5-5 Togoshi Shinagawa-ku, Tokyo, JAPAN 142-8511 MANUFACTURED

Novemver 2001

PLACE OF MANUFACTURER: A

CAUTION

LASER RADIATIONDO NOT STARE INTO BEAM MAX. OUTPUT: 1mW WAVE LENGTH

: 650nm

CLASS2 LASER PRODUCT

LASER RADIATION

IEC60825-1 :1993+A1:1997

MAX. OUTPUT: 1mW WAVE LENGTH: 650nm

DO NOT STARE INTO BEAM

CLASS2 LASER PRODUCT

AVOID EXPOSURE-

LASER RADIATIONS IS

EMITTED FROM THIS

APERTURE

STANDBY/ON Button

LASER Button

VIDEO Button

Disk Pad

Used to operate the mouse shift function and left click function.

AUTO Button

MENU Button

MENU SELECT Button

Used to click the left mouse button.

, , , Button

Used to operate the mouse shift function.

MAGNIFY Button

BLANK Button

RGB Button MOUSE / RIGHT Button

Used to click the right mouse button.

RESET Button

Used to click the right mouse button.

FREEZE Button

MUTE Button

PinP Button

KEYSTONE Button

VOLUME Button

POSITION Button

CP-X990W

Message Contents

CHANGE THE LAMP

AFTER REPLACING LAMP,

RESET THE LAMP TIME.

(*1)

The usage time of lamp will be reaching 2000 hr shortly.(*2) It is recommended to replace the lamp soon. Prepare a new lamp as a replacement.

CHANGE THE LAMP

AFTER REPLACING LAMP,

RESET THE LAMP TIME.

THE POWER WILL TURN OFF

AFTER ** hr.

(*1)

The usage time of lamp will be reaching 2000 hr shortly. It is recommended to replace the lamp within * * hours.(*2) It might be happened that the lamp is cut off before * * hr by any chance. Power will be switched OFF automatically in * * hours. Replace the lamp as shown in P.21~22 “Lamp”. Always reset the lamp timer after replacing the lamp.

CHANGE THE LAMP

AFTER REPLACING LAMP,

RESET THE LAMP TIME.

THE POWER WILL

TURN OFF

AFTER 0 hr.

The usage time of lamp is about to reach. Power will be switched OFF in a few minutes.(*2) Switch power OFF immediately and replace the lamp as shown in P.21~22 “Lamp”. Always reset the lamp timer after replacing the lamp.

NO INPUT IS DETECTED

ON ***

No input signal found. Check signal input connections and signal sources.

SYNC IS OUT OF RANGE

ON ***

The horizontal or vertical frequency of the input signal is not within the specified range. Check the specifications of the equipment and the signal source.

CHECK THE AIR FLOW

The internal temperature has risen. Switch power OFF, and wait 20 minutes until the equipment cools. Check the following and Switch power ON again. * Are the ventilation openings blocked. * Is the air filter dirty. * Is the ambient temperature in excess of 35°C.

(*1) This message is cleared automatically after approximately three minutes, and appears every time power is switched ON. (*2) The unit has a function to turn the power off which will be active when the usage time reaches 2000 hr. However the life of lamp might be much different among lamps, so that it might be happened that a lamp is cut off before the function is active.

NOTE

OSD Message

The messages as described below may appear on the screen at power ON. Take the appropriate measures when

such messages appears.

CP-X990W

POWER

indicator

LAMP

indicator

TEMP

indicator

Contents

Lights

orange

Turns off Turns off The Standby mode has been set.

Blinks green

Turns off Turns off Warming up. Please wait.

Lights green

Turns off Turns off ON. Normal operation possible.

Blinks

orange

Turns off Turns off Cooling. Please wait.

Lights red

Lights

red

Turns off

Lamp is not lit. The interior of the equipment may be too hot. Switch power OFF, wait 20 minutes until the equipment cools, and check whether the ventilation openings are blocked, whether the air filter is dirty, or whether the ambient temperature exceeds 35 °C. And switch power ON again. Replace the lamp if the same problem occurs.

Lights red

Blinks

red

Turns off

Lamp or lamp cover is not found, or hasn’t been fitted in correctly. Switch power OFF, and wait for 45 minutes until the equipment cools. Check fitting of the lamp and lamp cover, and switch power ON again. Contact your dealer if the same problem occurs again.

Lights red Turns off

Blinks

red

The cooling fan is not operating. Switch power OFF, and wait for 20 minutes until the equipment cools. Check for foreign matters in the fan, and switch power ON again. Contact your dealer if the same problem occurs again.

Lights red Turns off

Lights

red

The interior of the equipment is too hot. Switch power OFF, and wait for 20 minutes until the equipment cools. Check whether the ventilation openings are blocked, whether the air filter is dirty, or whether the ambient temperature exceeds 35 °C. Then switch power ON again. Contact your dealer if the same problem occurs again.

When the internal temperature becomes excessive power is switched OFF automatically

for safety reasons, and the indicator is extinguished. Set the power switch to [

] and wait for 20

minutes until the equipment has cooled sufficiently.

NOTE

Indicators Message

The POWER indicator, LAMP indicator, and TEMP indicator are lit and blank as follows. Take the appropriate

measures.

4. Adjustment

30%

112/255

0/255

Required

adjustment

Dichroic

optics unit

LCD/LENS

prism

assembly

PWB

assembly

drive

Lamp

unit

Ghost

(Chap.4-2)

Flicker

(Chap.4-3)

NRSH

(Chap.4-4)

White balance

(Chap.4-5)

Color uniformity

(Chap.4-6)

Replaced part

4-1 Before adjusting

4-1-1 Adjustment menu

1. Before starting adjustment, warm up the projector

for about 10 minutes. (Blank white)

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

distance of more than 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. And select the [DEFAULT].)

*note : The setup menu is not displayed on with no

signal.

CP-X990W

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 one time. And

press the [RESET] button again for 5 seconds

or more (the Adjustment menu will appear).

4-1-2 Required adjustment

Relation between the replacement part and required

adjustment are shown in Table 4-1-2.

4-2 Ghost adjustment

Signals for internal adjustment

Tabel 4-1-2: Required adjustment

: need

: recommend : no need



Adjustment procedure

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

to adjust so that R color ghost is at a minimum.

(Press the [RESET] button, then raise the value.

When a ghost appears to the left of a vertical line,

reduce the value by 2 steps.)

2. In the same way, use DAC-P - GHOST-G: in the

Adjustment menu to adjust so that G color ghost is

at a minimum.

3. In the same way, use DAC-P - GHOST-B: in the

Adjustment menu to adjust so that B color ghost is

at a minimum.

CP-X990W

192

/255

168

/255

144

/255

120

/255

4-3 Flicker adjustment

(V.COM adjustment)

Signals for internal adjustment

4-4

NRSH adjustment

(vertical stripe adjustment)

Signals for internal adjustment

Adjustment procedure

1. Ma ke th i s a d ju st m en t a f te r c o mp l et in g t h e

adjustment in 4-2 Ghost adjustment.

2. Use DAC-P - V.COM - R: in the Adjustment 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.)

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.

Adjustment procedure

1. Ma ke th i s a d ju st m en t a f te r c o mp l et in g t h e

adjustment in 4-3 Flicker adjustment.

2. Use DAC-P - NRSH - R: in the Adjustment menu to

adjust so that the vertical lines spaced every 12

dots are as inconspicuous as possible.

(Reduce the adjustment value when black stripes

appear in the 2nd or 3rd tone from the black side.

Note that when the adjustment value is lowered,

white stripes may appear in the 2nd or 3rd tone

from the bright side. Should this happen, adjust so

that the stripes are as inconspicuous as possible.)

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

Adjustment menu to adjust vertical stripes of G color.

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

Adjustment menu to adjust vertical stripes of B color.

4-5

SUB-CONTRAST operation

0 14 29 43 86 9375 100

Brightness

Input signal (%)

SUB-BRIGHT operation

0 14 29 43 86 9375 100

Brightness

Input signal (%)

White balance adjustment (visual inspection)

Preparations

1. Pe r for m these ad j ust m e n t s after th e NRSH

adjustment described in Section 4-4.

Adjustment procedure

1. First, adjust the G color.

2. Select GAMMA, SUB-CONTRAST, and G: in the

Adjust menu. If the background is white solid,

press the [MENU SELECT] key on the Remote

control transmitter to change to [G] monochrome in

the 28-tone grayscale.

3. Adjust GAMMA, SUB-CONTRAST, and G: in the

Adjust menu so that brightness of 28 steps is best.

4. Don’t adjust GAMMA, SUB-BRIGHT, and G: in the

Adjust menu. Because we want to keep the best

contrast ratio.

5. Then adjust colors R and B.

CP-X990W

2. Reset gamma correction before adjustment.

Place the cursor on [GAMMA] in the Adjustment

menu, pre s s t h e [ RE S ET ] key and se l ec t

[DEFAULT].

6. Select GAMMA, SUB-CONTRAST, and G: in the

Adjust menu. If the background is white solid,

press the [MENU SELECT] key on the Remote

control trasmitter to change to [W] monochrome in

the 28-tone grayscale.

7. Adjust GAMMA, SUB-BRIGHT, R: and B: in the

Adjust menu so that low-brigtness white balance is

best.

8. Adjust GAMMA, SUB-CONTRAST, R: and B: in the

Adjust menu so th at middle-b r ightne ss white

balance is best.

9. Repeat steps 7 to 8 above, and adjust so that

brightness white balance of 28 steps is best.

Adjustment operations (reference)

CP-X990W

VID-AD

DAC-P GAMMAC. UNIF.

No. 1

R 0

LEVEL

BLACK

MIN MID-L MID-H MAX

STRIPE

OFF

G 0

B 0

Major adjustment lattice point No.

15 17

V/6

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

V/3

V/6

4-6 Color uniformity adjustment

Preparations

1. Perform these adjustments after the white balance

adjustment described in Section 4-5.

2. Make a color unifo rmity a d jus t m e nt fo r the

following four tones.

MIN tone (approx. 0% input signal)

MID-L tone (approx. 11% input signal)

MID-H tone (approx. 36% input signal)

MAX tone (approx. 75% input signal)

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, and 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

interna l 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).

Soli d white (use for adj ustment oth er than

above).

8. Reset color-shading correction before adjustment.

When 4 tones and all colors are to be reset,

place the cursor on [C.UNIF.] in the Adjustment

menu, p res s the [RESET] key and s el e c t

[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.

Adjust menu

Adjust Tone menu

Major adjustment lattice point position

Adjustment procedure 1

(when a color differential meter is used)

1. First adjust [MID-L] tone [G:].

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

When the background is not [G] monochrome,

press the [MENU SELECT] key on the Remote

con t rol t ra ns mitt e r to c hang e to s o lid [ G]

monochrome.

3. Measure the illumination at adjustment points No.

2, No.3, No.10 and No.11.

The values should be:

No.2 = Y2 [lx] No.10 = Y10 [lx]

No.3 = Y3 [lx] No.11 = Y11 [lx]

4. No.2 and No.3 adjustment point have the average

of Y2 and Y3.

Y2 = ( Y2 + Y3 ) / 2 ± 2 [%]

Y3 = ( Y2 + Y3 ) / 2 ± 2 [%]

5. No.10 and No.1 1 a d justment point have the

average of Y10 and Y11.

Y10 = ( Y10 + Y11 ) / 2 ± 2 [%]

Y11 = ( Y10 + Y11 ) / 2 ± 2 [%]

6. Then adjust [MID-L] tone [R] and [B].

When the background is [G] monochrome, press

the [MENU SELECT] key on the Remote control

transmitter to change to solid white.

7. Measure 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 us e d , the [ ](delta) m o d e 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.

8. Measure the color coordinates of measurement

point [No.2] and adjust [No.2][R:] and [B:] so that

the coordinates are as follows.

x = x1 ± 0.003 , y = y1 ± 0.005 (Target)

x = x1 ± 0.010 , y = y1 ± 0.020

CP-X990W

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

[No.17] and adjust their color coordinates starting

in order from the small number points.

This completes adjustments required for [MIN].

Note: Since excessive correction may lead to a

correction data overview dur ing internal

calculations, use the following values for

reference.

[No.2] to [No.5] ± 40 or less

[No.6] to [No.9] ± 50 or less

[No.10] to [No.13] ± 70 or less

[No.14] to [No.17] ± 120 or less

10. Then adjust [MIN] tone [G] so that the adjustment

data set two times as much as [MID-L] tone [G].

This completes [G] color adjustments.

11. Then adjust [MIN] tone [R] and [B].

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

key on the Remote control transmitter to change to

solid white.

12. Measure the color coordinates of adjustment point

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

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

13. N ow me a s u r e t h e co l o r co o r d in at es o f

measurement point [No.2] and adjust [No.2][R:]

and [B:] so that the coordinates are as follows.

x = x1 ± 0.005 , y = y1 ± 0.010 (Target)

x = x1 ± 0.020 , y = y1 ± 0.040

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

[No.17] and adjust their color coordinates starting

in order from the small number points.

This completes [MIN] tone adjustments.

15. Now make similar adjustments for [MID-H] tone.

(Adjust [MID-H] tone [G] so that the adjustment

data set half as many as [MID-L] tone [G].)

16. Now make similar adjustments for [MAX] tone.

(Adjust [MAX] tone [G] so that the adjustment data

set half as many as [MID-L] tone [G].)

CP-X990W

Adjustment procedure 2

(visual inspection)

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

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

If the background is [G] monochrome, press the

[MENU SEL ECT] key on the Rem ote con trol

transmitter to change to solid white.

3. 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 measurement

point [No.1].

4. 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 measurement

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

whose color intensity is lower than measurement

point [No.1].

5. Now adjust the [MIN] tone for colors [R] and [B].

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

an d [No.1 1 ] . Adjust the [ R ] a n d [ B ] o f e a c h

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.

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

[No.12], [No.13] and make similar adjustments.

Then adjust measurement points [No.6], [No.7], [No.8],

[No.9], [No.14], [No.15], [No.16] and [No.17].

This completes the [MIN] tone adjustments.

9. Make similar another three tones as described in

steps 1 to 8 above.

CP-X990W

2101

15 13

2101

1012

3511

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

CP-X990W

1 36

14 113

EDS2

ESW1ERM1

EDI3

EFZ1

EMD1

EDI2

EPBX EPRX

EPGX

EDI1

PWB assembly DRIVE

PROJECTION

LENS

The power supply input of PWB assembly DRIVE

EDS2 Pin No.

Power supply voltage value

+9V

GND

+16.5V

GND

+5V

GND

+5V (standby)

GND

+4.3V

GND

5. Troubleshooting

Check points at trouble shooting

Connectors on the back side of PWB assembly DRIVE are drawn by dotted line.

Power can not be turned on

Power unit (circuit)

PWB assembly FILTER

FUSE

PWB assembly DRIVE

YES

PWB assembly VIDEO

YES

PWB assembly DRIVE

Is power LED lit

in orange ?

Does Projector turn

on by Remote ?

YES

Change the PWB

assembly KEYBOARD.

Does power can

be turned on ?

PWB assembly KEYBOARD

YES

PWB assembly TEMP

YES

It there sound like

"zip" when the Projector

turns on ?

Disconnect

connector from PWB

assembly TP-SW.

Does projector turn

on ?

Power unit (circuit)

Change the PWB

assembly DRIVE.

Does power can

be turned on ?

Change the PWB assembly VIDEO.

Does power can

be turned on ?

CP-X990W

Lamp does not light

PWB assembly DRIVE

YES

Not light

Blinks

Light

Power unit

(Ballast)

Power unit

(Ballast)

Power unit

(Circuit)

Power unit (Circuit)

Set the Lamp cover again

YES

LAMP

Set the Lamp again

Disconnect

flexible connector from

EMD1 connector.

And light on?

PWB assembly FAN

YES

Replace

the PWB assembly

FAN and remove the

PWB assembly DRIVE.

Does lamp light ?

What is the state of

LAMP indicator

during operation ?

Change the Lamp. Does Lamp light ?

Change the

Power unit (Ballast).

Does Lamp light ?

Is the Lamp cover set ?

YES

Is the Lamp installed

correctly ?

LIMIT SWITCH (LAMP/LAMP DOOR)

YES

Change the

LIMIT SWITCH

(LAMP/LAMP DOOR).

Does Lamp light ?

Is TEMP indicator

flashing ?

YES

Change the

Power unit (Ballast)

Does Lamp light ?

One of FANS is broke change then one by one and find out.

CP-X990W

Picture is not displayed (is wrong) when the RGB Signal is inputted.

YES

Is RGB1 or a

picture of which of RGB2

displayed ?

Change the IS01

on the PWB assembly

RGB. Is it repaired ?

PWB assembly RGB

YES

Change the PWB

assembly RGB.

Is it repaired ?

PWB assembly DRIVE

IC (IS01)

EL4332CS

YES

Picture is displayed when the VIDEO or DIGITAL.

PWB assembly DRIVE

YES

Picture is not displayed (is wrong) when the DIGITAL Signal is inputted.

PWB assembly DRIVE

PWB assembly RGB

YES

Change the PWB

assembly DRIVE.

Is it repaired ?

Picture is displayed when the RGB or VIDEO is inputted.

Picture is not displayed (is wrong) when the RGB Signal output

Video picture is displayed. (Only RGB is wrong.)

PWB assembly FAN

Change the PWB

assembly DRIVE.

Is it repaired ?

PWB assembly RGB

YES

Change the PWB

assembly RGB.

Is it repaired ?

PWB assembly VIDEO

Power unit (Circuit)

YES

Change the PWB assembly VIDEO.

Is it repaired ?

Change the PWB assembly DRIVE.

Is it repaired ?

CP-X990W

Picture is displayed when the Digital or RGB is inputted.

Change the PWB

DRIVE.

It is repaired ?

PWB assembly DRIVE

YES

PWB assembly RGB

YES

Change the PWB

RGB.

It is repaired ?

PWB assembly VIDEO

Picture is not displayed (is wrong) when the all signals are inputted.

Change the PWB

DRIVE.

It is repaired ?

PWB assembly DRIVE

YES

Does a start up

screen come up ?

Check the DC

voltage on EDS2, PWB

assembly DRIVE

correct ?

Change the PWB assembly VIDEO. Is the issue fixed ?

YES

PWB assembly RGB

LCD Panel

Power unit (Circuit)

YES

PWB assembly VIDEO

YES

Change the PWB

RGB.

Is the RGB signal

displayed ?

1 : +9V 3 : +16.5V 5 : +5V 7 : +5V(standby) 9 ~

: +4.3V

No sound

Change the SPEAKER.

Fixed ?

SPEAKER

YES

PWB assembly FAN

YES

Change the PWB

assembly FAN.

Fixed ?

PWB assembly DRIVE

YES

Change the PWB

assembly DRIVE.

Fixed ?

PWB assembly RGB

YES

Change the PWB

assembly RGB.

Fixed ?

PWB assembly VIDEO

Can not control mouse. Can not control RS-232C.

Change the PWB

assembly DRIVE.

Fixed ?

PWB assembly DRIVE

YES

PWB assembly FAN

YES

Change the PWB

assembly FAN.

Fixed ?

PWB assembly RGB

Can not control USB mouse

Change the PWB

assembly FAN.

Fixed ?

PWB assembly FAN

YES

PWB assembly DRIVE

YES

Change the PWB

assembly DRIVE.

Fixed ?

PWB assembly RGB

YES

Change the PWB

assembly RGB.

Fixed ?

PWB assembly VIDEO

CP-X990W

6. Service points

Cautions when removing the Upper case

In the Upper case, an operation PWB is installed. When removing, lift carefully without using excessive force to

prevent damaging the ESW1 and ESW2 connector.

ESW2

CNSW

ESW1

Cautions when removing the drive PWB

When removing the drive PWB, there is danger of damaging the connector connecting the fan PWB. Lift up the part

near the drive PWB connector and disconnect the connector before removing the drive PWB.

PWB assembly Drive

Connector

Before Replacing the LCD / Lens Prism

You should not replace separately the parts of the liquid crystal LCD / Lens Prism because it works properly only when used together. Therefore, regarding these parts, you can either replace part , LCD / Lens Prism assembly, or send the whole unit LCD / Lens Prism assembly back to HITACHI, where we will replace the malfunctioning part, recondition the device and send it back to you.

DISTRIBUTOR HITACHI

Do not disassemble the unit because replacement of separate parts is not possible.

For repairs of the product, please contact our distributor.

G Panel

Replacement of G Panel Reconditioning

Return

+ 46 hidden pages

Hitachi cpx990w Service Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

Contents

1. Features

2. Specifications

3. Names of each part

4. Adjustment

5. Troubleshooting

6. Service points