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SM0524
CPX327(C3XM3)
EDS3170(C3S3)
EDX3270(C3XM3)
EDS3170A(C3S3E)
EDX3270A(C3XM3)
ED-X3250AT(C3X3ET)
SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT.
Multimedia LCD Projector
January 2003 Digital Media Division
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 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.
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 ------------------------------------ 5
4. Adjustment ------------------------------------------------
7
5. Troubleshooting----------------------------------------
13
6. Service points ------------------------------------------
18
7. Block diagram ------------------------------------------
30
8. Connector connection diagram -------------------- 32
9. Wiring diagram -----------------------------------------
34
10.Basic circuit diagrams------------------------------- 40
11.Disassembly diagram --------------------------------- 59
12.Replacement parts list-------------------------------- 61
13.RS-232C communication ---------------------------- 64
Contents
CPS317(C3S3)
EDX3280AT(C3XM4ET)


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1
1. Features
1,500 ANSI lumens, 2.7kg(6lbs)
Full connectivity
Easy and flexible keystone adjustment
My screen
Wide angle lens
Low noise
2. Specifications
Liquid crystal
panel
Lamp
Video input
RGB input /
output
Drive system
Panel size
Number of pixels
System
Level
Analog RGB
Sync.
I
nput
Output
Audio
Speaker output
Power supply
Power consumption
Dimensions
Weight
Temperature range
Accessories
TFT active matrix
CPS317/EDS3170 /EDS3170A
CPX327/EDX3270/EDX3270A
0.7 inches
800 (H) × 600 (V)
1024 (H) × 768 (V)
150W UHB
Composite
S-video
NTSC, PAL(BGDHI), SECAM, PAL-M, PAL-N, NTSC4.43, PAL60
Remote control transmitter × 1
RGB cable × 1
Video/Audio cable × 1
USB cable × 1
0.7Vp-p (75
termination)
TTL level
200mVrms, 47k
200mVrms, output impedance 1k
1.0W (mono)
AC100~120V/2.7A, AC220~240V/1.3A
240W
295 (W) × 87.5 (H) × 231 (D) mm
2.74kg (6.04lbs)
Operation : 0~35°C
Storage : -20~60°C
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)
POWER cord × 3
Battery × 2
Carrying bag × 1
(CP Models Only)
User's manual (with Safety Instructions)× 1
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)
CPS317, EDS3170, EDS3170A, CPX327, EDX3270, EDX3270A


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n
/EDX3250AT
Features
2
EDX3280AT, EDX3250AT
Specification
EDX3280AT, (1,200 lumens, 2.7kg(6lbs) EDX3250AT)


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Difference with the conventional model
The base model of EDX3280AT is EDX3270A. The liquid crystal panel is the main change from EDX3270A.
The main differences with the base model are described in the following table.
EDX3280AT
3


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ED-X3250AT (C3X3E-T)
2
ED-X3250AT (C3X3E-T)
4
Difference with the conventional model
The base model of ED-X3250AT is ED-X3270A. The liquid crystal panel is mainly changed from ED-X3270A.
The main differences with the base model are described in the following table.
The main differences with the conventional model
No.
Contents
Difference
Note
ED-X3270A
ED-X3250AT
1 Features
Brightness
1,500 ANSI lumens
(A catalog may have 1,700
ANSI lumens)
Brightness
1,200 ANSI lumens
2 Specifications
Accessories:
Power cord 1
Accessories:
Power cord 2
3 Parts list
LCD/LENS PRISM ASS'Y:
UX09286
Others
LCD/LENS PRISM ASS'Y:
UX09287
Others
Only difference is described. Please refer to a ED-X3270A service guide except the above-mentioned
difference.
Lamp (Option Lamp: DT00521(ED-X3250AT))
HIGH VOLTAGE
HIGH TEMPERATURE
HIGH PRESSURE
Before replacing the lamp, check the serial number of the replacement lamp bulb (sold separately:
DT-00521 for ED-X3250AT), then contact your local dealer. Before replacing the lamp, turn off the
power, and unplug the power cord, then wait at least 45 minutes, in order to ensure that the
lamp is properly cooled. Removing the lamp bulb while it is still hot could cause burns, or cause
the lamp bulb to burst.