Optoma EP747 Schematic

SERVICE MANUAL

Model Name : EP747

Prepared by SI :
________________________________________
Prepared by TSE :
________________________________________
Checked by :
________________________________________
Approved by :
________________________________________

Date Revise Version Description

2005/12/13 V1.0 Initial Issue

Copyright December, 2005 . All Rights Reserved

Preface

This manual is applied to EP747 0.7” DMD XGA digital projection system. It’s the mode of single Panel,
180 Watt Compact P-VIP Lamp and 1024(H) x 768(V) resolution. The manual gives you a brief descrip­tion of basic technical information to help in service and maintaining the product.

Your customers will appreciate the quick response time when you immediately identify problems that occur
with our products. We expect your customers will appreciate the service that you offer them.

This manual is for technicians and people who have an electronic background. Send the product back to
the distributor for repairing and do not attempt to do anything that is complex or is not mentioned in the
troubleshooting.

NOTICE :

The information found in this manual is subject to change without prior notice. Any subsequent changes
made to the data herein will be incorporated in further edition.

Copyright 2005, December
All Rights Reserved
Manual Version 1.0

i

EP747

Table of Contents

Chapter 1 Introduction 1-1

Highlight 1-1
Mechanical Specification 1-2
Optical Specification 1-2
Environment 1-3
Compatible Mode 1-5

Chapter 2 Disassembly of Procedure 2-1

Equipment Needed 2-1
Disassemble Lamp, Top Cover, Keypad Board and IR Receiver 2-2
Disassemble I/O Cover, Main Board, Lamp Driver, LVPS and
Axial Fan Module 2-6
Disassemble Engine Module, DMD Chip, DMD Board, Color Wheel
and Photo Sensor Board 2-11
Disassemble Focus Ring, DMD Fan, Speaker, Blower Fan and
Elevator Module 2-14

Chapter 3 Troubleshooting 3-1

Equipment Needed 3-1
Main Procedure 3-1

Chapter 4 Function Test and Alignment Procedure 4-1

Test Equipment Needed 4-1
Service Mode 4-1
Test Condition 4-2
Inspection Procedure 4-2

Chapter 5 Firmware Upgrade Pr ocedure 5-1

Equipment Needed 5-1
Installation Procedure 5-1
Firmware Upgrade Procedure 5-6

EP747

Chapter 6 EDID Key-in Procedure 6-1

Equipment Needed 6-1
Setup Procedure 6-2
DDC Key-in Procedure 6-2

Appendix A 7-1

Exploded Overview 7-1

Appendix B 7-17

PCBA Code Definition 7-17

Appendix C 7-18

Serial Number System Definition 7-18
Reader’s Response 7-19

EP747ii

Chapter 1

Introduction

1-1 Highlight

No Item Description

True 1024x768 resolution, 16.7M True colors

1 Resolution

Maximum resolution SXGA+ 1400*1050

2 DMD Chip 0.7’’ XGA DDR DMD XGA

3 ID H72 Housing ID

4 Lamp

5 Brightness 3000 lumens

6

7 Weight 7.1 lbs.

8 Lens Manual focus projection 1:1.2 zoom lens

9

Contrast
Ratio

Electrical
Spec

Osram P-VIP 180-230Watt 1.0arc gap E20.5 Lamp (user re­placeable)

2000:1

Auto image signal detect using most recently used signal as
priority

NTSC/PAL/SECAM video capability with composite and S­Video

HDTV video (480i/p, 576i/p, 720p, 1080i) with 480i/576i/1080i
deinterlacing

Photocatalysis (O2air) Technology

VGA with Audio 1 (could by fixed)

1 audio outRS232/mini connector (not D-Sub9)

DVI-I (connector) (accept DVI-Dsignal) with HDCP

1-1

EP747

No Item Description

8

9 Compatibility SXGA+/SXGA/XGA/SVGA/VGA/MAC

10 Speaker one 3 Watt speaker

11 Audio 4 audio in and 1 audio out

Electrical
Spec

Wireless remote with mouse and laser pointer

Dual VGA (d-sub 15) (support SCART/RGB/YPbPr)

1-2 Mechanical Specification

No Item Description

1 Weight Approximate 7 lbs

Projector

2

control key­pad

Power/standby, Directional keys, enter, source, menu

“Lamp” Red:blinking red for fan locked

3

4

5 Tilt Angle 7 degrees with elevator mechanism

Power indi­cator lights

Cooling Sys­tem

“Temp” Red
“Power” Green:blinking green (warming up)
orange (cooling up)

- Advanced air flow

- Fans with low system acoustic noise level

- Temperature control circuits with adaptive voltage control fan
speed

- High Altitude fan setting for user setting

1-3 Optical Specification

No Item Description

1 DMD Single 0.7” 12D DDR DMD XGA

2 Resolution Native 4:3, 1024*768 resolution

3 Brightness

2040 lumens (Minimum)
2550 lumens (Typical)

1-2

EP747

No Item Description

4 Contrast

5 Uniformity

6

7

8

9 screen size Adjustable from 30.75” to 300”.(Diagonal)

10

11 Keystone +/- 16% Vertical only (DDP2000)

Displayable
colors

Color tem­perature:

Projectors
lens

Projection
distance

1200:1 (Minimum)
1500:1 (Typical)

65% (Minimum)
75% (Typical)

16.7 million colors 256 shades of gray

7500ºK (Low, Mid, High selectable)
adjustable to 6500ºK - 9500ºK

1.2x zoom lens,

2.0 – 2.4 throw ratio
With ability to attach long throw and short throw lens

1.5 – 12.2meter

1-4 Environment

No Item Description

1 Temperature

2

3

4 Lamp life

Maximum
Humidity

Acoustic
noise level

- Operating: 5 -- 35°C

- Storage: -20 -- 60°C

- Operating: 5 -- 35°C, 80% non-condensing

- Storage: -20 -- 60°C, 80% non-condensing

- 37dB (A)( Typical, 23 ± 2ºC) with wind tunnel design
37 dB(A) 230W Normal mode.
32 dB(A) 180 W ECO-mode.
Follow ISO-7779 regulation sound pressure level A
weighting measurement

-2000 hours typical, 50% survival rate (Full power Mode)

-4000 hours min, 50% survival rate (Eco Mode)

1-3

EP747

No Item Description

- Operating 0~2,500 ft 5°C~35°C

5 Altitude

6 MTBF 12000 HRs

2,500~5,000 ft 5°C~30°C
5,000~10,000 ft 5°C~25°C

- Storage 40,000 ft (Max)

1-4

EP747

1-5 Compatible Mode

Analog

Compatibility Resolution V-Sync [Hz] H-Sync [KHz]

VGA 640x350 70 31.5

640x350 85 37.9

640x400 85 37.9

640x480 60 31.5

640x480 72 37.9

640x480 75 37.5

640x480 85 43.3

720x400 70 31.5

720x400 85 37.9

SVGA 800x600 56 35.2

800x600 60 37.9

800x600 72 48.1

800x600 75 46.9

800x600 85 53.7

XGA 1024x768 60 48.4

1024x768 70 56.5

1024x768 75 60.0

1024x768 85 68.7

SXGA 1280x1024 60 63.98

1280x1024 75 79.98

SXGA+ 1400x1050 60 63.98

MAC LC 13” 640x480 66.66 34.98

MAC II 13” 640x480 66.68 35

MAC 16” 832x624 74.55 49.725

MAC 19” 1024x768 75 60.24

MAC 1152x870 75.06 68.68

MAC G4 640x480 60 31.35

I Mac DV 1024x768 75 60

I Mac DV 1152x870 75 68.49

I Mac DV 1280x960 75 75

1-5

EP747

Digital

Mode Resolution V-Sync [Hz] H-Sync [KHz]

VGA 640x350 70 31.5

640x350 85 37.9

640x400 85 37.9

640x480 60 31.5

640x480 72 37.9

640x480 75 37.5

640x480 85 43.3

720x400 70 31.5

720x400 85 37.9

SVGA 800x600 56 35.2

800x600 60 37.9

800x600 72 48.1

800x600 75 46.9

800x600 85 53.7

XGA 1024x768 60 48.4

1024x768 70 56.5

1024x768 75 60.0

1024x768 85 68.7

SXGA 1280x1024 60 63.98

SXGA+ 1400x1050 60 63.98

1-6

EP747

Chapter 2

Disassembly Process

2-1 Equipment Needed

Item Photo Item Photo

Screw Bit
(+) :107

Hex
Sleeves
8mm

Hex Sleeves
5mm

Tweezers

2-1

EP747

2-2 Disassemble Lamp, Top Cover, Keypad Board and IR
Receiver

No Procedure Photo

1 Unscrew 1 screw to remove

Lamp Cover

2

Unscrew 2 screws to re­move Lamp Module

2-2

Lamp

EP747

No Procedure Photo

3

Unscrew 5 screws and
unplug FPC Wire to remove
Top Cover

Top Cover

FPC Wire

2-3

EP747

No Procedure Photo

4

Unscrew 4 screws to re­move Top Shielding Module

Top Shielding Module

5

Unscrew 1 screw to remove
Keypad Board

2-4

Keypad Board

EP747

No Procedure Photo

Remove Keypad Button
directly.

6

Notice: please turn Keypad But­ton at 45 angle

45 angle

Keypad Button

Remove IR receiver, Mylar

7

and lens from Top Cover
directly.

IR Receiver

2-5

EP747

2-3 Disassemble I/O Cover, Main Board, Lamp Driver, LVPS
and Axial Fan Module

No Procedure Photo

Unscrew 8 hex screws to

1

remove I/O Cover and I/O
Shielding Moudle.

I/O Cover

2 Remove Light Cut Mylar.

I/O Shileding Module

2-6

I/O Shileding Module

EP747

No Procedure Photo

3

Unscrew 3 screws to re­move Air Duct Module.

Air Duct Module

4

Remove Isolator Mylar
directly.

2-7

Isolator Mylar

EP747

No Procedure Photo

Unscrew 5 screws and

5

unplug 9 connectors to re­move Main Board

Main Board

6

Remove Main Board Mylar
from Main Board.

2-8

Main Board Mylar

EP747

No Procedure Photo

Unscrew 5 screws and
unplug 3 connectors to

7

remove Lamp Driver, Lamp
Driver Holder and Lamp
Driver Mylar.

Lamp Driver

Unscrew 5 screws to re-

8

move LVPS Shielding
Module.

Lamp Driver
Holder

Lamp Driver
Maylar

2-9

LVPS Shielding Module

EP747

No Procedure Photo

9

10 Take off Maylar directly.

Unplug 3 connectors to
remove LVPS.

11

Unscrew 2 screws to re­move Axial Fan Module.

2-10

Mylar

Axial Fan module

EP747

2-4 Disassemble Engine Module, DMD Chip, DMD Board,
Color Wheel and Photo Sensor Board.

No Procedure Photo

1

Unscrew 2 screws to re­move Wire 2P#22 220C.

Wire 2P#22 220C

2

Unscrew 1 screw to remove
Blower Duct.

2-11

Blower Duct

EP747

No Procedure Photo

Unscrew 6 screws to re-

3

move Engine Module and
Upper Lens Supporter.

Engine Module

Unscrew 4 screws to re-

4

move Heatsink and 2
Springs.

Heatsink & 2 Springs

Upper Lens Supporter

Unscrew 4 hex screws to

5

remove DMD Board and
DMD Chip.

2-12

DMD Board & DMD Chip

EP747