HITACHI CPX275W - Service Manual Immediate Download

0518

CPX275W (C3XM2)

SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT.

Multimedia LCD Projector

December 2001 Digital Media Group

SERVICE MANUAL

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 LCD Projector. Be sure to

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

Caution

1. When replacing the lamp, avoid burns to your fingers. The lamp becomes very 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 (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 the LCD module assembly, do not hold

the FPC of the LCD module assembly.

6. Use the cables which are included with the projector or specified.

Service Warning

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

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

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

4. Adjustment ------------------------------------------------ 5

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

6. Service points ------------------------------------------ 17

7. Block diagram ------------------------------------------ 23

8. Connector connection diagram -------------------- 24

9. Wiring diagram ----------------------------------------- 25

10.Basic circuit diagram---------------------------------- 32

11.Disassembly diagram--------------------------------- 48

12.Replacement parts list ------------------------------- 50

13.Option parts list ---------------------------------------- 51

Contents

PJ550 (C3XM2)

14.RS-232C communication ---------------------------- 52

15.Command data chart --------------------------------- 54

1. Features

High brightness, High resolution

Compact size, light weight for portability

RS-232C Communication

Complies with VESA DDC1/2B specifications

Auto-adjustment function

2. Specifications

Liquid crystal

panel

Lamp

Video input

RGB input

Drive system

Panel size

Number of pixels

System

Level

Video signal

Sync signal

Audio input

Speaker output

Power supply

Power consumption

Dimensions

Weight

Temperature range

Accessories

TFT active matrix

0.7 inches

1024 (H) × 768 (V)

150W UHB

Composite

Y/C

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

Analog RGB input

0.7Vp-p (75

termination)

H/V separate

TTL level

200mVrms, 47k

1.0W (mono)

AC100~120V/2.7A, AC220~240V/1.3A

240W

289 (W) × 84 (H) × 215 (D) mm

2.49kg (5.4lbs)

Operation

: 0~35°C

Storage

: -20~60°C

Remote

Control Transmitter x1

RGB

Cable x1

Component

Cable x1

ower Cord x3

1.0 0.1Vp-p (75

termination)

0.3 0.1Vp-p (PAL/SECAM burst signal, 75

termination)

Y : 1.0 0.1Vp-p (75

termination)

C : 0.286 0.1Vp-p (NTSC burst signal, 75

termination)

Battery (inside Remote control transmitter)

Carrying

Bag x1

User's

Manual (with Safety Instructions) x1

Component

PB/PR : 0.7 0.1Vp-p (75

termination)

Y : 1.0 0.1Vp-p (75

termination)

CB/CR : 0.7 0.1Vp-p (75

termination)

3. Names of each part

Parts names

Remote Control Sensor

COMPONENT

Y Terminal

CB/PB Terminal

CR/PR Terminal

S-VIDEO Terminal

RESET Button

KEYSTONE 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)

RGB Terminal

CONTROL Terminal

AUDIO Terminal

AUDIO

R Terminal

L Terminal

VIDEO Terminal

Power Switch

AC Inlet

(to the Power Cord)

Ventilation Openings

(Intake)

Zoom Knob

Focus Ring

Remote Control Sensor

Lens

Slide Lens door (CPX275W)

Foot Adjuster

Control Panel

FRONT / LEFT / VIEW

REAR / RIGHT / VIEW

TERMINAL PANEL

Lens Cap (PJ550)

VIDEO

STANDBY/ON

KEYSTONE

POSITION

FREEZE

MAGNIFY

VOLUME

AUTO

OFF

BLANK

SELECT

RGB

MUTE

RESET

STANDBY/ON Button

KEYSTONE Button

Button

MENU Button

MAGNIFY

Button

MAGNIFY

Button

MAGNIFY

Button

AUTO 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

4. Adjustment

4-1 Before adjusting

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, and then press

the [RESET] button. And select the [DEFAULT].)

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

signal.

4. Set the another [MENU] as follows.

a. GAMMA in the IMAGE menu is NORMAL.

b. COLOR TEMP. in the IMAGE menu is NORMAL.

c. WHISPER in the OPT menu is NORMAL.

5. 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).

4-2 Ghost adjustment

Signals for internal adjustment

30%

112/255

bit

0/255

bit

Adjustment procedure

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

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

(Set the adjustment value to default, and 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.

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 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.