Epson EMP EMP-1825 User manual

Service Manual
Data Projector
EMP-1825/
EMP-1815/
EMP-1810

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CONFIDENTIAL
EMP-1825/EMP-1815/EMP-1810
SEIKO EPSON Revision:C
INTRODUCTION
This Service Manual describes basic functions, theory of electrical and mechanical operations, mainte-
nance and repair procedures of the EMP-1825/1815/1810. This information is intended for the experi-
enced repair technicians, and attention should be given to the precautions on the preceding pages.
This manual consists of four chapters and Appendix.
NOTICE
All rights reserved. No part of this manual may be reproduced, stored in retrieval system, or
transmitted in any form or by any means, electronic, mechanical, photocopying, recording,
or otherwise, without prior written of SEIKO EPSON CORPORATION.
The contents of this manual should be handled with sufficient consideration for confidenti-
ality reasons.
After publication of this manual, the parts and mechanism may be subject to change for
improvement of their performance. Therefore, note that the descriptions given in this man-
ual may not coincide with the actual machine.
Other company or product names used herein are for identification purpose only and may
be trademarks or registered trademarks of their respective owners. EPSON disclaims any
and all rights in those marks.
Copy right ©2007 SEIKO EPSON CORPORATION.
Chapter 1 PRODUCT DESCRIPTIONS Provides a general overview and basic specifications, specifications of controls, inter-
faces, consumable supplies, and after service parts.
Chapter 2 OPERATING PRINCIPLES Describes the configuration of each mechanism, theory of operations of the basic mech-
anisms and controls in this product.
Chapter 3 TROUBLE SHOOTING
Describes the step-by-step procedures of the trouble shooting.
Chapter 4 DISASSENBLY & ASSEMBLY Describes the step-by-step procedures for disassembling and assembling the compo-
nents.
Chapter 5 ADJUSTMENT Describes the step-by-step procedures for adjusting the functions after replacing the
specific parts.
Chapter 6 APPENDIX Provides maintenance information (After service menu etc.) required for servicing the
product.

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REVISION HISTORY
After first release of this manual, the parts and mechanism may be subject to change for improvement
of their performance and the manual may be revised. Be sure to always keep this manual up to date.
History Date Detail of change
Rev.A 2006.12.27 First Release
Rev.B 2007.4.13 P4-17 Change in SW cable forming
Rev.C 2007.11.30 All pages Additional information added for EMP-1825.

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IMPORTANT PRECAUTIONS IN SAFETY AND MAINTENANCE PER-
FORMANCE
Here describes the important points to keep in mind in repair and maintenance performance.
Symbols
To prevent injury to the repair technicians and to protect the devices, the categorized safety instructions
are provided in this manual with the symbols below. Be sure to read and understand their meanings
before proceeding to the next section.
Category Symbol Meaning
Danger Indicates an extremely hazardous operation which, if ignored or operated incorrectly, could result in serious
or fatal personal injury.
Warning Indicates a potentially hazardous operation which, if ignored or operated incorrectly, could result in serious
or fatal personal injury.
Caution Indicates a potentially hazardous operation which, if ignored or operated incorrectly, could result in minor
injury or damage to equipment.
Prohibited
Matter Indicates a prohibited action or operation in repair and maintenance performance.
Instruction Indicates a compulsory action or operation that must be
carried out in repair and maintenance performance.

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Safety Instructions
The precautionary measures itemized below should be fully understood when performing repair and
maintenance procedures.
When disassembling/assembling, be sure to turn off the power switch and pull out
the power cable from the projector beforehand.
Never touch the current-carrying part or high temperature section during a test oper-
ation, signal measurement or any other situations that is necessary to perform the
repair/maintenance work with the power turned on and the cover removed.
Do not wear the metal products such as wrist watch, cuff buttons, rings, tiepin etc. to
avoid getting a electric shock.
Do not touch the lamp assy. or the parts around it. They are extremely hot even after
completed the cooling down operation, and may cause a burn injury.
Therefore, leave the unit until it becomes cool enough before performing mainte-
nance work.
Never let the safety devices mounted in this product inactivated for any reason what-
soever.
Never modify the safety devices or replace them with the ones that are not desig-
nated for any reason whatsoever. (Such actions may cause a fire or serious injury.)
Never modify the product for any reason whatsoever. (Except for a case that is under
the instructions to do so.)
Never peer through the projection lens during repair/maintenance work when the
power is on.
(Such an action may cause a visual disability because of a very strong light emis-
sion.)
Never use a deformed plug or a damaged power cable to this product.
If any deformations or damages are found on the power cable or plug section,
replace it with a new specified power cable.
Never use the air blowers that contain flammable gas in repair/maintenance work.

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Other Caution
Since the lamp of this product contains mercury, be sure to dispose the used lamp pursuant
to the government’s law and regulations.
Never use or replace with any service parts that is not specified by EPSON.
Be sure to perform the repair/maintenance work on the even and stable work bench to
prevent the product from dropping down or mal-operation due to the improper setting
of the product.
Be sure to wear the gloves during the repair/maintenance work to avoid injuries by the
parts with sharp edges such as metal plate or the like.
To protect sensitive circuitry, follow the instructions below.
•When disassembling or reassembling, be sure to wear static discharge equipment
such as an anti-static wrist strap and a mat.
•When replacing the circuit component such as a board or the optical engine, be
sure to contact the anti-static case containing the new one to the metal part of this
product before taking it out.
When performing the repair/maintenance work, be sure to use the specified tools and
follow the instructions that are specified in the documents (service manual etc.) con-
cerning to this product.
When carrying out the test operation, do not block the intake and exhaust ducts.
(Such an action raises the internal temperature and may cause a fire or a damages to
the internal parts of this product.)
Be careful not to drop a metal part such as a screw, a washer, or a clip into the inside
of the product. If such cases should occur accidentally, never turn on the power supply
until all the dropped parts are found and removed.
After reassembling the product, check the followings before turning the power on.
•All the parts and screws are installed and secured to the proper positions.
•No cables are caught in the metal frames.

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Chapter 1 Product Specifications
1.1 Product Features .....................................................................................1-2
1.1.1 Features of the Projector...............................................................1-2
1.2 Specifications...........................................................................................1-3
1.3 External Views.........................................................................................1-4
1.4 Dimensions for Ceiling Mount..................................................................1-6
Chapter 2 Theory of Operation
2.1 Internal Components................................................................................2-2
2.2 Hardware Overview .................................................................................2-3
2.2.1 Electrical Circuit Components.......................................................2-4
2.2.2 Optical Engine...............................................................................2-6
2.3 Temperature Control................................................................................2-7
2.3.1 Sensors and Switches...................................................................2-7
Chapter 3 Troubleshooting
3.1 Before Carrying Out Troubleshooting......................................................3-2
3.1.1 Troubleshooting Tools and Equipment..........................................3-2
3.2 Basic Information on Troubleshooting .....................................................3-3
3.2.1 LED Indicators...............................................................................3-3
3.2.2 Cable Connection and Projector’s Status......................................3-6
3.3 Troubleshooting.......................................................................................3-9
3.3.1 Basic Checking Flowchart.............................................................3-9
3.3.2 Abnormality Check......................................................................3-10
3.3.3 Exterior Check.............................................................................3-11
3.3.4 Connection Check.......................................................................3-12
3.3.5 Power ON/OFF & Initialization Check.........................................3-14
3.3.6 Image Display & Quality Check...................................................3-15
3.3.7 Audio I/O’s Check........................................................................3-17
3.3.8 Lens Shutter’s Operation Check .................................................3-18
3.3.9 Control Panel’s Operation Check................................................3-19
3.3.10 RC & Projector’s Operation Check..............................................3-20
3.3.11 Wireless/Wired LAN’s Operation Check (EMP-1825/1815 only).3-21
Chapter 4 Disassembly/Assembly
4.1 Overview..................................................................................................4-2
4.1.1 Precautions ...................................................................................4-2
4.1.2 Precautions which must be taken when servicing.........................4-3
4.1.3 Safety precautions.........................................................................4-3
4.1.4 Tools and Equipment ....................................................................4-4
4.1.5 Precautions for Optical Engine and Main (MA) Board...................4-5
4.2 Projector Disassembly and Assembly......................................................4-6
4.3 Removing Exterior Parts/Components...................................................4-10
4.3.1 Removing the AS Lamp Unit.......................................................4-10
4.3.2 Removing the Air Filter Assy.......................................................4-11
4.3.3 Removing the Front Foot Unit/Rear Foot/Rubber Foot...............4-12
4.3.4 Removing the IF-IM Case/Upper Case Unit AJ...........................4-13

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4.4 Removing the Engine/Boards................................................................4-20
4.4.1 Removing the Optical Engine and MAB (1) (MA Board Assy.) ...4-20
4.4.2 Removing the Inner Exhaust Duct B/TH Board Assy..................4-40
4.4.3 Removing the Optical Engine and MAB (2) (Optical Engine)......4-42
4.5 Removing Other Main Parts...................................................................4-46
4.5.1 Removing the Inner Exhaust Duct A/Exhaust Fan Assy.............4-46
4.5.2 Removing the PS Fan/PS Ballast Assy./Speaker .......................4-48
4.5.3 Removing the PS Ballast Assy.(2) (Filter Board Unit)/Lamp Fan 4-51
4.5.4 Removing the Intake Fan/PBS Fan/AC Cable/RC Board Assy...4-54
4.5.5 Removing the Ballast Filter Assy./Security Bar/Lower Case.......4-58
Chapter 5 Adjustment
5.1 Overview..................................................................................................5-2
5.1.1 Required Adjustment List..............................................................5-2
5.1.2 Required Equipment/Tools............................................................5-2
5.2 Adjustment (Calibration) ..........................................................................5-3
5.2.1 G-Sensor’s Zero Point Adjustment................................................5-3
5.2.2 Inspection Procedure ....................................................................5-3
5.2.3 CMOS Image Sensor Calibration..................................................5-4
5.2.4 Inspection Procedure ....................................................................5-8
Chapter 6 Appendix
6.1 AS (After Service) Menu..........................................................................6-2
6.1.1 How To Display the AS (After Service) Menu ...............................6-2
6.1.2 Initializing (Resetting) the AS Menu Values..................................6-5

Chapter 1 Product Specifications

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1.1 Product Features
The EMP-1825/1815/1810 is a portable data projector in a compact body and with the follow-
ing features.
1.1.1 Features of the Projector
EMP-1825/1815/1810 Common Features
Quick Setup
This feature corrects distortion in the projected image by a simple one-touch operation.
Images can be corrected and matched to the size of the screen to simplify preparations.
The A/V mute slide makes it easy to project and store
The A/V mute slide simplifies stopping and resuming projection. You can stop/resume
projection simply by closing/opening the A/V mute slide.
No need to cool down (Instant Off)
You can detach the projector's power cable soon after the power is off.
Ample protect functions
•Password Protect
By setting a password, you can control and restrict who can use the projector.
•Operation Lock
Setting this function effective can prevent someone from changing the projector’s set-
tings without permission in a situation such as the use in an event, or in a school.
EMP-1825/1815 Features
Wireless LAN fitted as standard equipment
Wired LAN terminal mounted
Enhanced Network function (EMP-1825)
Faster processing speed than EMP-1815 improves networking performance.
USB display
Simply by connecting a USB cable to your computer, you can project images on your
computer’s display.
Presentations without a computer
Simply by connecting the USB storage device containing the presentation data, you can
make the presentation without a computer.
Multi-screen display
You can project each virtual display set on the computer by using two or more projectors.
You can use it to make file operations and arrangements for the virtual displays while
projecting only the virtual displays.
EMP-1810 EMP-1825/1815
Wireless LAN unit
CF card slot

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1.2 Specifications
MODEL EMP-1825/1815 EMP-1810
Specification
of main parts LCD Size 0.8-inch with MLA
D5
Pixel number 786,432 dots (1024 x 768) x 3
Native Resolution XGA
Aspect ratio 4:3
Projection
Lens Type Manual zoom / Manual focus
Zoom ratio 1-1.6
Lamp Type 210W UHE
Life 2500H(High Bright)/3000H(Low Bright)
Brightness
(Color mode:
Game,
Zoom: Wide)
High Brightness Mode 3500 ANSI lumens
Low Brightness Mode 2700 ANSI lumens
Sound output 5W Monaural
Card Slot CF x 1 (3.3V) N/A
Operating Temperature 5°C to 35°C <41°F to 95°F> (20% - 80% humidity)
/Thermal shut down: T > 45°C
5×C to 35 ×C <41×F to 95×F> (over 1500 m / 4921 ft: with High altitude
mode, High brightness) (20% - 80% humidity, unfrozen)
Operating Altitude 0 m to 2286 m <0 ft to 7500 ft>
(over 1500 m / 4921 ft: with High altitude mode)
Start-up period about 10 seconds (warm-up period: 30 seconds)
Cool-down period Instant off
Power Supply Voltage 100 - 240 V AC +/10%, 50/60 H
Power
Consumption 100-120V Area
(JAPAN,
USA,
etc.)
Lamp On 306 W
Standby (Network On) 12 W
Standby (Network Off) 2.6 W
220-240V
Area
(Europe,
etc.)
Lamp On 286W
Standby (Network On) 12 W
Standby (Network Off) 4.6 W
Rated Voltage & Current 100 - 240 V AC 3.4 - 1.5 A 50/60 Hz
Fan Stop Standby & Network Standby
Dimension Exclude Feet (D x W x H) 257 x 345 x 86 mm
Maximum Dimension (D x W x H) 257 x 345 x 95 mm
Weight Approx. 6.9 lbs. / 3.1 kg Approx. 6.5 lbs. / 2.9 kg
Fan Noise High Brightness mode 37 dB
Low Brightness mode 32 dB

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1.3 External Views
Figure 1-1. External Dimensions (mm)
34.433.2
40
78.1
21.4 29.1
98
59
72.2
117
13.8
137.8
148
100.8
90
8.8
47.1
86.54.8
257
56.518
6.2
112
11.9
135
50
M4x9-3
115 61.6
345
119
181.1
1280
127
95.3
Unit: mm

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Figure 1-2. External Dimensions (inch)
1.351.31
1.57
3.07
0.84 1.15
3.86
2.32
2.84
4.61
0.54
5.43
5.83
3.97
3.54
0.35
1.85
3.41
0.19
10.1
2.220.71
2.44
4.41
0.47
5.31
1.97
M4x9-3
4.53 2.43
13.6
4.69
7.13
0.473.15
5.0
3.75
Unit: inch

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1.4 Dimensions for Ceiling Mount
Figure 1-3. Dimensions for Ceiling Mount (cm)
7
14
Ø 50
15.573
141.5100.5 80
26.5
160
19
5°
30
5°
52 21.5
117
25°
153.5 63.5
5°
140
51.5
191.5
Unit: mm

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Figure 1-4. Dimensions for Ceiling Mount (inch)
0.28
0.55
Ø 1.97
0.612.87
5.573.96 3.15
1.04
6.3
0.75
5°
1.18
5°
2.05 0.85
4.61
25°
6.04 2.5
5°
5.51
2.03
7.54
Unit: inch

Chapter 2 Theory of Operation

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2.1 Internal Components
The main components that make up the projecter are shown in the figure below.
Figure 2-1.
Control Panel
Lamp Fan
Lamp Unit
Optical Engine
PS Ballast
Assy.
Exhaust Fan
TH Board
(Lamp Thermistor) Safety Switch
Upper Case
Intake Fans
PS Fan
MA Board Assy.
Wireless LAN
EMP-1825/1815
PBS Fan
IM Board Assy.

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2.2 Hardware Overview
The hardware of this projector consists of the optical block and the electrical circuit
components. The overview of the hardware and functions is shown below.
Figure 2-2.
Optical Engine
Monitor Out
Computer1
Computer2
CVBS
S-Video
Wired LAN
IS Board
TH Board
Safety
SW
RC Board
Photo
Interrupter
IS Board
L/V
Thermistor
Lamp Lid
Detection
SW
PS Ballast
Control Panel
IM Board USB Board
Intake Fan A Intake Fan B
EX fan
Lamp Fan
P/S Fan
PBS Fan
Wireless LAN
Module
Lamp
L/V(B)
Drive Signal
(CN2100)
L/V(R)
Drive Signal
(CN1900)
L/V(G)
Drive Signal
(CN2000)
MA Board EMP-1825/1815EMP-1810

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2.2.1 Electrical Circuit Components
The components and their functions are explained below.
Component name Function
MA Board
The circuit board that controls the whole system and functions of the projector.
The main functions are listed below.
•Degitally processes the input data from the external devices.
•Generates the drive signals of the L/V (R/G/B).
•Controls the external I/O interface.
•Drives and controls the Lamp.
•Monitors the sensors’ input and controls the internal temperature with the
fans (fan drive control).
PS Ballast
Assy.
PS Unit Generates and supplies the DC power used in each components from the AC
input.
Ballast Unit Generates the power supply to drive the Lamp from the DC power supplied
from the PS Unit.
Control Panel The control part of the projector located on the Upper Case. Various buttons for
each functions are mounted on the panel.
RC Board Receives the IR signal from the remote controler. Mounted at the front and the
back of the projector.
Fans
P/S Fan Ventilates the PS Ballast Assy.
Lamp Fan Ventilates the Lamp.
EX Fan Exhausts the heated air generated inside the projector to the outside.
PBS Fan Ventilates the PBS of the Light Guide Unit.
Intake Fan A/B Take in fresh air and ventilate the L/V.
Sensors
TH Board (Lamp
Thermistor)
The thermal detection sensor for the Lamp mounted on the Inner Exhaust Duct
around the lamp. , The fans are controled based on the detected thermal data
together with the one from L/V Thermistor explained below.
The temperature around the Lamp exceeds the specified level, the “High Temp
Warning” is issued. If the temperature continues to rise, the projecctor issues
the “High Temp. Error” message with LED indicators and stop theBallast Unit,
and shuts off the power supply to the Lamp.
L/V Thermistor
The thermal detection sensor for L/V mounted on the POP of the Optical
Engine. The fans are controled based on the detected thermal data together with
the one from Lamp Thermistor explained above. (The function of the ther-
mistor and the warning signs are the same as the Lamp Thermistor above.
Safety Switch
Functions as the safety device in the case of the loss of temperature control due
to the failure of the thermistors. This is a detection switch for the prevension of
overheating, and is mounted on the side of the Inner Exhaust Duct. If the inter-
nal temperature exceeds the specified level, the switch cuts off the AC power
supply. The power supply cannot be activated until the internal temperature
drops below the certain level.
Lamp Lid
Detection Switch
Detects the status of the cover for the lamp replacement. If the Lamp Lid
opens, the power supply to the Lamp is cut off. In such a case, the power sup-
ply cannot be activated.
Lens Shutter Detection Sensor
(Photo Interrupter)
The sensor using a photo interrupter to detect the status of the Lens Shutter.
The “Closed” status is detected when the protrusion of the shutter for detection
blocks the detection light inside the sensor. On the “Closed” Status:
the solid black is displayed.
the audio output switches to the A/V mute mode.
the Lamp turns to the Low Brightness mode.

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Figure 2-3. Control Circuit Connecting Diagram
CN1900 CN2100
CN2000
L/V (R/G/B)
Speaker
Intake Fan B P/S Fan
Photo Interrupter
CN1204
CN1303
CN1305 CN1202
PS Ballast (SCI)
IS Board
CN500
(EMP-1800 only)
CN1205
CN2400
Lamp Fan
CN1306
TH Board
CN1300
EX Fan
CN1304
PBS Fan
RC Board
CN1307
PS Ballast (Power)
CN2200
L/V Thermistor
CN1301
Control Panel
CN1203
Intake Fan A
CN1302
IM Board
Lamp Lid Detection SW
CN1201
CN502 (EMP-1825/1815 only)