Acer P7280, P7280rf, P7270irf, P7290 Schematic

SERVICE MANUAL

P7280/P7270I/P7280 Refresh/P7270I Refresh/P7290

Date Revise Version Description

2008.1.24 V1.0 Initial Issue

2008.6.30 V2.0 Add P7280 Refresh/P7270i Refresh

Add Waveform Download in Chapter 5, add Defaul

2008.10.10 V3.0

2009.05.05 V4.0

2009.07.31 V5.0 Add P7290 model

Copyright July, 2009 All Rights Reserved P/N: 36.89K01G001

Language in Chapter 6, and modify Chapter 4 and
Appnendix B

1. Add the “Universal Password Failure” in Chapter 3

2. Revise FW Upgrade Procedure’s method in Chapter 5

3. Modify the title of 6-6 in Chapter 6

SI : TSE: Check: Approved:

Preface

This manual is applied to P7280/P7270I/P7280 Refresh/P7270I Refresh/P7290 projection
system. The manual gives you a brief description of basic technical information to help in
service and maintain 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. Please
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 future edition.

P7280/P7270I/P7280 Refresh/P7270I Refresh/P7290 Service Manual
Copyright July, 2009
All Rights Reserved
Manual Version 5.0

P7280/P7270I/P7280 Refresh/P7270I Refresh/P7290

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P7270I/P7280/P7270I Refresh/P7280 Refresh/P7290Refresh/P7290/P7290
Comparison List

Parts P7270I P7270I Refresh P7280 P7280 Refresh P7290

LAMP
WARNING
LABEL

THERMAL
SWITCH

DMD
BLOWER

COLOR
WHEEL
MODULE

ENGINE
MODULE

MAIN BD
MODULE

I/O BD
MODULE

BOTTOM
COVER
MODULE

BACK
COVER
MODULE

TOP
COVER
MODULE

LAMP
DRIVER
MODULE

INTER­LOCK
SWITCH

LAMP
MODULE

LVPS 75.85H15G001 75.88B07G001 75.8FA01GP01
WIRELESS

MODULE
HANDY

DRIVE
EXTERNAL

ANTENNA
LAMP

BLOWER

70.87Y30GR01 70.89K24GR01 70.87Y30GR01 70.89K24GR01 70.8FA16GR01

70.87Y32GR01 70.87Y43GR01 70.89K17GR01 70.89K25GR01 70.8FA19GR01

70.87Y39GR01 70.87Y42GR01 70.89K22GR01 70.8FA17GR01

35.88E01G002 35.88B04G002

43.87Y01G001 43.89K01G001

N/A 49.89K01G001

70.87Y31GR01 70.89K16GR01

70.87Y33GR01 70.89K18GR01

70.87Y35GR01 70.89K19GR01 70.8FA18GR01

70.87Y37GR01 70.89K20GR01

70.87Y38GR01 70.89K21GR01 70.8FA15GR01

75.87Y04G001 75.89K01G001 75.8FA03G001

SP.87Y01GC01 SP.89K01GC01 SP.8FA01GC01

75.87Y02G002 N/A

75.87Y15G002 N/A

75.87Y11G001 N/A

49.87C01G001 49.8EA01G001

P7280/P7270I/P7280 Refresh/P7270I Refresh/P7290

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Table of Content

Chapter 1 Introduction

Highlight 1-1
Compatible Mode 1-5
Product Overview 1-9

Chapter 2 Disassembly Process

Equipment Needed & Product Overview 2-1
Disassemble Top Cover Module 2-2
Disassemble Lamp Module 2-4
Disassemble Wireless Module (only for P7270I/P7270I
Refresh) 2-5
Disassemble Top Shielding Module 2-7
Disassemble Zoom Ring and Focus Ring Module 2-10
Disassemble Back Cover Module 2-11
Disassemble Left and Right Cover Module 2-12
Disassemble Front Cover Module 2-13
Disassemble Front Shielding 2-14
Disassemble Main Board Module and I/O Board Module 2-15
Disassemble Shielding Module 2-17
Disassemble LVPS Module 2-19
Disassemble Fan Module 2-21
Disassemble Engine Module 2-22
Disassemble Color Wheel Module 2-24
Disassemble DMD Board and DMD Chip 2-25
Disassemble Lamp Blower Module 2-26
Disassemble ROD Blower Module 2-27
Disassemble ROD Duct Module 2-28
Disassemble System Duct Module 2-29

P7280/P7270I/P7280 Refresh/P7270I Refresh/P7290

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Disassemble Lamp Driver Module 2-30
Disassemble Lamp Driver Holder (only for P7270I/
P7270I Refresh) 2-31
Disassemble Interrupt Switch Module 2-32
Disassemble Elevator Module 2-33
Rod Adjustment 2-34
Re-write Lamp Usage Hour 2-35
Assemble Elevator Module 2-36
Assemble Interrupt Switch Module 2-37
Assemble Lamp Driver Holder (only for P7270I/
P7270I Refresh) 2-37
Assemble Lamp Driver Module 2-38
Assemble System Duct Module 2-39
Assemble ROD Duct 2-40
Assemble ROD Blower Module 2-40
Assemble Lamp Blower Module 2-41
Assemble DMD Board and DMD Chip 2-41
Assemble Color Wheel Module 2-42
Assemble Thermal Switch 2-42
Assemble Engine Module 2-43
Assemble Fan Module 2-44
Assemble LVPS Module 2-45
Assemble Shielding Module 2-47
Assemble Main Board Module and I/O Board Module 2-49
Assemble Front Shielding 2-51
Assemble Front Cover Module 2-52
Assemble Left and Right Cover Module 2-53
Assemble Back Cover Module 2-54
Assemble Zoom Ring and Focus Ring Module 2-55

P7280/P7270I/P7280 Refresh/P7270I Refresh/P7290

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Assemble Top Shielding Module 2-56
Assemble Wireless Module (only for P7270I/P7270I Refresh)2-58
Assemble Lamp Module 2-60
Assemble Top Cover Module 2-61

Chapter 3 Troubleshooting

LED Lighting Message 3-1
Main Procedure 3-2
Beep Sound 3-6

Chapter 4 Function Test & Alignment Procedure

Test Equipment Needed 4-1
Service Mode 4-1
OSD Reset 4-1
Test Condition 4-2
Test Inspection Procedure 4-3
PC Mode 4-4
Video Performance 4-7
Optical Performance Measure 4-8
Others 4-10
WLAN and LAN Signal Test(only for P7270I/P7270I Refresh) 4-11

Chapter 5 Firmware Upgrade

Equipment Needed 5-1
DLP Composer Lite Setup Procedure 5-2
USB Driver Upgrade Procedure 5-4
Firmware Upgrade Procedure 5-5
Waveform Download (for P7280 Refresh/P7270I Refresh
/P7290) 5-8

P7280/P7270I/P7280 Refresh/P7270I Refresh/P7290

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Chapter 6 EDID Upgrade

EDID Introduction 6-1
Equipment Needed 6-2

Setup Procedure (VGA1, VGA2, DVI) 6-3
EDID Key-In Procedure 6-4

Setup Procedure (HDMI) 6-7
Un-lock SNID and Default Language Reset
(for P7280 Refresh/P7270I Refresh/P7290) 6-10

Appendix A
Exploded Overview I

Appendix B

   SerialNumberSystemDenition     I

Appendix C

RS232 function command summary table I

PCBACodeDenition      II

P7280/P7270I/P7280 Refresh/P7270I Refresh/P7290

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Chapter 1

Introduction

1-1 Highlight

No Item Description

1 Dimensions (W x D x H) ● 403.6 (W) x 315.4 (D) x 119.8 (H) mm
2 Weight

3 Cooling System

4 Lamp Housing

5 DMD Chip ● TI DMD 0.7" 12° LVDS XGA Digital Mirror Device (DC3)
6 Number of active dots ● 1024 (H) x 768 (V)

7 Power Supply

● P7270I Refresh/P7270I/P7290: 12.2 lbs/5.5 kg

● P7280 Refresh/P7280: 12.4 lbs/5.6 kg

● Air Tunnel Flow

● Cooling fans with system optimized acoustic

● Temperature control circuits with adaptive fan rotational
speeds

● Maximum touch temperature follows UL60950-1

● Lamp assembly could be changed by customer himself,
but should read the user manual for instruction in advance.

● Lamp assembly should be provided by Coretronic and

distribute through authorized agencies

● Universal AC 100 – 240 V ~ 50-60 Hz with PFC input

● Variance FAN speed control (Depends on temperature
variant)

● P7270I Refresh/P7270I (280W):
Normal mode: 400W+/-10%@110VAC
ECO mode: 330W+/-10%@110VAC
Standby< 5W (without wireless module)
Standby< 13W (with wireless module)
(Wireless module stand-by mode < 8W)

8 Power Consumption

P7280/P7270I/P7280 Refresh/P7270I Refresh/P7290

● P7280 Refresh/P7280 (330W):

Normal mode: 450W+/-10%@110VAC
ECO mode: 380W+/-10%@110VAC
Standby< 5W (without wireless module)

● P7290:

Normal mode: 460W (without wireless module)@110Vac

ECO mode: 385W (without wireless module)@110Vac

Standby < 1W (without wireless module)

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No Item Description

● Hsync Frequency 30 k~ 100 kHz

● Vsync Frequency 56~ 85 Hz (for P7280/P7270I/
P7280 Refresh/P7270I Refresh)

● Vsync Frequency 50~ 85 Hz (for P7290)

● Video Signal RGB (PC)
Analog RGB 0.7Vp-p, 75 ohm, Separate TTL H,V Sync

9 Input signal spec

10 Video Compatibility

Analog RGB 1Vp-p, 75 ohm, Sync. On Green signal
Analog RGB 0.7Vp-p, 75 ohm, Composite TTL Sync.

● Video
Composite video 1Vp-p,75 ohm
S-video Luminance 0.714Vp-p, 75 ohm
S-video Chrominance 0.286Vp-p, 75 ohm
Component video 1Vp-p, 75 ohm

● Standards :
NTSC: M (3.58MHz), 4.43 MHz
PAL: B, D, G, H, I, M, N
SECAM: B, D, G, K, K1, L
HDTV: 720p, 1080i, 1080p
EDTV: 480p, 576p
SDTV: 480i, 576i

● Two 8-Ohm internal speakers

11 Audio

12 Lamp

13 Throw Distance ● 1.5m~ 10m
14 Throw Ratio ● 1.57~ 1.89: 1 @ 60”

● 3 Watts

● Input sensitivity 0.5Vrms

● 280W for OSRAM E20.6 Lamp @normal operation
(for P7270I Refresh/P7270I)

● 330W for Philips Lamp @normal operation
(for P7280 Refresh/P7280)

● 350W for Philips Lamp @normal operation (for P7290)

P7280/P7270I/P7280 Refresh/P7270I Refresh/P7290

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No Item Description

● Engineering spec:

• For P7270I Refresh/P7270I (280W):
Typical: 3420 lumens
Minimum: 3040 lumens
(Compliance with IS021118 criteria)

• For P7280 Refresh/P7280 (330W):
Typical: 4050 lumens
Minimum: 3600 lumens

15 Brightness

(Compliance with IS021118 criteria)

• For P7290 (350W)

Typical 4500 ANSI Lumens

Minimum 4000 ANSI Lumens
(Compliance with ISO21118 brightness criteria)

● Marketing spec:

• 3800 lumens (for P7270I Refresh/P7270I)P7270I Refresh/P7270I)

• 4500 lumens (for P7280 Refresh/P7280)P7280 Refresh/P7280)

• 5000 lumens (for P7290)

● Engineering spec:

• For P7280/P7270I/P7280 Refresh/ P7270I Refresh:

2100 : 1 Full White and Black (Typical)
1500 : 1 Full White and Black (Minimum)

16 Contrast

17 Uniformity

• For P7290:

2700 : 1 Full White and Black (Typical)
1900 : 1 Full White and Black (Minimum)

● Marketing spec:

• 2200:1 (P7280/P7270I/P7280/P7270I/P7280 Refresh/ P7270I Refresh)

• 3150:1 (for P7290)

● Engineering spec:

• 60% Japan standard (Minimum) (for P7280/P7270I/P7280

Refresh/ P7270I Refresh

• 65% Japan standard (Minimum) (for P7290)

• 80% Japan standard (Typical)

● Marketing spec:

• >85%

P7280/P7270I/P7280 Refresh/P7270I Refresh/P7290

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No Item Description

● Six segments

● 7200 rpm @ CW 2X

● 9000 rpm @ CW 3X, PAL 50Hz (for P7270I Refresh/P7280

18 Color Wheel

Refresh/P7290)

● Segment Angle: R90B82W42C28G90Y28
(for P7280/P7270I/P7280Refresh/P7270I Refresh)

● Segment Angle: R81Y41G84C31W52B71 (for P7290)

● for 0~ 2500 ft, 5~ 35 °C

19 Operation temperature

20 Storage temperature ● -20°C~ 60°C

21 Lamp life

● for 2500~ 5000 ft, 5~ 30 °C

● for 5000~ 10000 ft, 5~ 25 °C

● 2000 hours min, 50% survival rate (Normal mode)
(for P7280/ P7270I/P7280 Refresh/ P7270I Refresh)

1500 hours min, 50% survival rate (Normal mode) (for P7290)

● 2500 hours min, 50% survival rate (Eco mode)

P7280/P7270I/P7280 Refresh/P7270I Refresh/P7290

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1-2 Compatible Mode

A. VGA Analog

1. VGA Analog - PC Signal

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

640x480 60 31.50

640x480 72 37.90

VGA

SVGA

XGA

SXGA

QuadVGA

SXGA+ 1400x1050 60 65.30

UXGA 1600x1200 60 75.00

Power Mac G4

640x480 75 37.50
640x480 85 43.30

720x400 70 31.50

720x400 85 37.90
800x600 56 35.10
800x600 60 37.90

800x600 72 48.10

800x600 75 46.90
800x600 85 53.70
832x624 75 49.73

1024x768 60 48.40

1024x768 70 56.50

1024x768 75 60.00
1024x768 85 68.70

1152x864 70 63.80

1152x864 75 67.50
1152x864 85 77.10

1280X1024 60 63.98

1280X1024 72 76.97

1280X1024 75 79.98
1280X1024 85 91.10

1280x960 60 60.00
1280x960 75 75.23

640x480 66.6(67) 34.93

800x600 60 37.90
1024x768 60 48.40
1152x870 75 68.68
1280x960 75 75.00

P7280/P7270I/P7280 Refresh/P7270I Refresh/P7290

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

640x480 60 31.35

640x480 66.6(67) 34.93

PowerBook G4

i Mac DV (G3) 1024x768 75 60.00

800x600 60 37.90
1024x768 60 48.40
1152x870 75 68.68
1280x960 75 75.00

2. VGA Analog - Extended Wide timing

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

1280x768 60 47.80
1280x768 75 60.30
1280x768 85 68.60

WXGA

1280x720 60 44.77
1280x800 60 49.64
1440x900 60 59.90

1680x1050 60 65.29

B. DVI Digital

1. DVI - PC Signal

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

640x480 60 31.50

640x480 72 37.90

VGA

SVGA

P7280/P7270I/P7280 Refresh/P7270I Refresh/P7290

640x480 75 37.50
640x480 85 43.30

720x400 70 31.50

720x400 85 37.90
800x600 56 35.10
800x600 60 37.90

800x600 72 48.10

800x600 75 46.90
800x600 85 53.70
832x624 75 49.73

Condential

1-6

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

1024x768 60 48.40

XGA

SXGA

QuadVGA

SXGA+ 1400x1050 60 65.30

UXGA 1600x1200 60 75.00

Power Mac G4

PowerBook G4

i Mac DV (G3) 1024x768 75 60.00

1024x768 70 56.50

1024x768 75 60.00
1024x768 85 68.70

1152x864 70 63.80

1152x864 75 67.50
1152x864 85 77.10

1280x1024 60 63.98

1280x1024 72 76.97

1280x1024 75 79.98
1280x1024 85 91.10

1280x960 60 60.00
1280x960 75 75.23

640x480 66.6(67) 34.93
800x600 60 37.90

1024x768 60 48.40

1152x870 75 68.68

1280x960 75 75.00

640x480 60 31.35
640x480 66.6(67) 34.93
800x600 60 37.90

1024x768 60 48.40

1152x870 75 68.68

1280x960 75 75.00

2. DVI - Extended Wide timing

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

1280x768 60 47.80
1280x768 75 60.30
1280x768 85 68.60

WXGA

1280x720 60 44.77
1280x800 60 49.64
1440x900 60 59.90

1680x1050 60 65.29

P7280/P7270I/P7280 Refresh/P7270I Refresh/P7290

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3. DVI - Video Signal

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

For TWN/USA SKU

480i (NTSC) 720x480(1440x480) 59.94(29.97) 15.734
480p (NTSC) 720x480 59.94 31.469
720p (NTSC) 1280x720 60 44.955

1080i (NTSC) 1920x1080 60(30) 33.716

1080p (NTSC) 1920x1080 60 67.432

For EMEA SKU

576i (PAL) 720x576(1440x576) 50(25) 15.625
576p (PAL) 720x576 50 31.25
720p (PAL) 1280x720 50 37.5

1080i (PAL) 1920x1080 50 28.125

1080p (PAL) 1920x1080 50 56.25

C. HDMI -Digital

1. HDMI - PC Signal and Extended Wide timing: Support above DVI
digital timing format.

2. HDMI - Video Signal

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

For TWN/USA SKU

480i (NTSC) 720x480(1440x480) 59.94(29.97) 15.734
480p (NTSC) 720x480 59.94 31.469
720p (NTSC) 1280x720 60 44.955

1080i (NTSC) 1920x1080 60(30) 33.716

1080p (NTSC) 1920x1080 60 67.432

For EMEA SKU

576i (PAL) 720x576(1440x576) 50(25) 15.625
576p (PAL) 720x576 50 31.25
720p (PAL) 1280x720 50 37.5

1080i (PAL) 1920x1080 50 28.125

1080p (PAL) 1920x1080 50 56.25
Horizontal scan rate: 31k -100 kHz
Vertical scan rate: 56k - 85 Hz

P7280/P7270I/P7280 Refresh/P7270I Refresh/P7290

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1-3 Product Overview

Projector Outlook

Front /Upper side

Item Description Item Description

1 Control panel 6 Remote control receiver
2 Zoom ring 7 Tilt adjusting wheel

3 Focus ring 8 Elevator button
4 Zoom lens 9 Elevator foot

5 Lens cap

P7280/P7270I/P7280 Refresh/P7270I Refresh/P7290

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1-9

Rear side

Item Description Item Description

1

2

3 DVI input connector (for digit signal) 15 RS232 connector
4 HDMI connector 16 Audio output connector

5 Top cover release button 17 SPDIF output connector
6 KensingtonTM lock port 18 Power socket

7 Horn 19
8 YPbPr/YCbCr input connector 20

9

10 S-Video input connector 22
11 Composite video input connector 23

12

PC analog signal/HDTV/component
video input connector (VGA IN 2)

PC analog signal/HDTV/component
video input connector (VGA IN 1)

Monitor loop-through output
connector (VGA-Out)

Audio input connector (VGA IN 2/
Component/S-video/Composite signal)

13 VGA IN 1/DVID/HDMI with PC signal

14 USB connector

(#)

Wired IR remote input connector

(#)

Antenna

(#)

21

24

Lan (RJ45 Port for 10/100M Ethernet)

(#)

Audio output connector for wireless

(#)

Reset button

(#)

Power LED for wireless

Note: “#” Only for P7270i series.

P7280/P7270I/P7280 Refresh/P7270I Refresh/P7290

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1-10

Control Panel

Item Function Description

1 RESYNC

2 MENU

3 TEMP Temp Indicator LED
4 LAMP Lamp Indicator LED

5

6 SOURCE

7 Empowering key Unique Acer functions: eOpening, eView, eTimer. ePower
8 Infrared transmitter Sends signals to the projector.
9 POWER See the contents in “Turning the Projector On Off” section.

Four directional select
keys

Automatically synchronizes the projector to the
input source.

• Press “MENU” to launch the Onscreen display (OSD)
menu, back to the previous step for the OSD menu
operation or exit the OSD menu.

• Conrm your selection of items.

Use to select items or make adjustments to
your selection.

Press “SOURCE” to choose RGB, Component, SVideo,
Composite, DVI, HDTV and HDMI™ sources.

P7280/P7270I/P7280 Refresh/P7270I Refresh/P7290

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Remote Control Layout

P7280/P7270I/P7280 Refresh/P7270I Refresh/P7290

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1-12

Item Icon Function Description

Infrared
transmitter

Sends signals to the projector.

Laser pointer Aim the remote at the viewing screen

2

1

(#)

3 POWER Refer to the “Turning the Projector On/Off” sec

4 RESYNC Automatically synchronizes the projector to the input source.
5 FREEZE To pause the screen image.
6 ASPECT RATIO To choose the desired aspect ratio (Auto/4:3/16:9).

7 ZOOM Zooms the projector display in or out.

Left-/right-click buttons are on the left and right, respectively;

8

MOUSE Left/
Right Click

the center button works as a multidirectional pointer stick. To
enable this function, an USB cable must be connected to
projector from your PC.

9 VOLUME Increases/decreases the volume.

Aim the remote at the viewing screen, press and hold this

(#)

10

Laser button

button to activate the laser pointer.
This function is not supported in Japanese market.

Press “SOURCE” to choose from RGB, Component-p,

11 SOURCE

Component-i, S-Video, Composite, DVI-D, Video and HDTV
sources.

12 HIDE

Momentarily turns off the video. Press “HIDE” to hide the
image, press again to display the image.

13 MUTE To turn on/off the volume.

• Press “MENU” to launch the Onscreen display (OSD) menu,

14 MENU

back to the previous step for the OSD menu operation or
exit the OSD menu.

• Conrm your selection of items.

Four directional
select keys

15

KEYSTONE

Use up, down, left, right buttons to select items or make
adjustments to your selection.

Adjusts the image to compensate for distortion caused by
tilting the projector.

16 LOCATION Choose the menu location on the display screen.

For computer mode only. Use this button to select the next or

17 PAGE

previous page. This function is only available when con-

nected
to a computer via a USB cable.

18

Empowering
key

Unique Acer functions: eOpening, eView, eTimer
Management.

19 COLOR Press “COLOR” to adjust the color temperature of image.
20 CONTRAST

Use the “CONTRAST” option to control the difference
between the lightest and darkest parts of the picture.

21 VIDEO To change source to COMPOSITE VIDEO.
22 S-VIDEO To change source to S-Video.

P7280/P7270I/P7280 Refresh/P7270I Refresh/P7290

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Item Icon Function Description

Press “PIP” to see two screens at the same time. The main

23 PIP

screen projection signal uses VGA input by default while the
smaller PIP display uses a secondary video source.

Press “WIRELESS” to display the image which is wirelessly

24

(*)

WIRELESS

transmitted from the PC to the projector via the “Acer

eProjection Management” utility. (for wireless model)
25 BRIGHTNESS Press “BRIGHTNESS” to adjust the brightness of the image.
26 RGB Press “RGB” for true-color optimization.

Press “COMPONENT” to change source to Component

27 COMPONENT

video.

This connection supports YPbPr (480p/576p/720p/1080i) and

YCbCr (480i/576i).

Press “VGA” to change source to the VGA connector. This

28 VGA

connector supports analog RGB, YPbPr (480p/576p/720p/

1080i), YCbCr (480i/576i) and RGBsync.

Press “DVI” to change source to DVI. This connection sup­29 DVI

ports digital RGB, analog RGB, YPbPr (480p/576p/720p/

1080i), YCbCr (480i/576i) and HDCP signals.
30 HDMI™ To change source to HDMI™.
31 KeyPad 0~9 Press “0~9” to input a password in the “Security settings”.

Note: “*” Only for P7270i series.
“#” Japan area is not supported.

P7280/P7270I/P7280 Refresh/P7270I Refresh/P7290

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1-14

Connecting the Projector

Item Description Item Description

1 Power cord 8 DVI cable
2 VGA cable 9 HDMI cable

3 Composite video cable 10 3 RCA component cable
4 USB cable 11 RS232 cable
5 VGA to component/HDTV adapter 12 Audio cable Jack/RCA

6 S-Video cable 13 SPDIF cable

7 Audio cable jack/jack 14 Audio cable Jack for wired remote

Note: To ensure the projector works well with your computer,please make sure the timing of the
display mode is compatible with the projector.

P7280/P7270I/P7280 Refresh/P7270I Refresh/P7290

Condential

1-15

Connecting the Projector for Wireless

Item Description Item Description

1 Power cord 3 Lan cable
2 Audio cable jack 4 Antenna

Note: Only for P7270i

P7280/P7270I/P7280 Refresh/P7270I Refresh/P7290

Condential

1-16

System Block Diagram (for P7270I/P7270I Refresh)

P7280/P7270I/P7280 Refresh/P7270I Refresh/P7290

Condential

1-17

Bottom Cover Dimension

82.30 mm

140.00 mm
M3,DEPTH:8mm

SCALE 1:2

P7280/P7270I/P7280 Refresh/P7270I Refresh/P7290

Condential

1-18

Chapter 2

Disassembly & Assembly Process

2-1 Equipment Needed & Product Overview

1. Screw Bit (+) :107

2. Hex Sleeves 5mm

3. Long Nose Nipper

4. Screw Bit (+) :102

5. Hex Sleeves 7mm

6. Tweezers

7. Projector

* Before you start: This process is protective level II. Operators should wear electrostatic chains.
* Note: 1. If you need to replace the main board, you have to get into service mode and record the

lamp usage hour. please refer to section 2-27.

2. The disassembly and assembly process for P7280/P7270I/P72780 Refresh/P7270I
Refresh /P7290 is the same. Here, we take P7270i as an example.

P7280/P7270I/P7280 Refresh/P7270I Refresh/P7290

Condential

2-1

2-2 Disassemble Top Cover

Module

1. Rotate the Top Cover Lock
counterclockwise (as red arrow).

2. Pull up the Top Cover (as yellow arrow).

3. Unscrew 4 screws and disassemble the
Top Cover Module (as yellow circle).

P7280/P7270I/P7280 Refresh/P7270I Refresh/P7290

Condential 2-2

4. Unscrew 2 screws (as red circle) and
disassemble 1 Hinge on each side.

P7280/P7270I/P7280 Refresh/P7270I Refresh/P7290

Condential 2-3

2-3 Disassemble Lamp

Module

1. Unscrew 4 screws (as red circle).

2. Pull up the Lamp Cover from the red
square and disassemble Lamp Cover.

3. Unscrew 2 screws (as yellow circle) and
disassemble Lamp Module.

P7280/P7270I/P7280 Refresh/P7270I Refresh/P7290

Condential 2-4

2-4 Disassemble Wireless

Module (only for P7270I
/P7270I Refresh)

1. Unscrew 3 screws (as red circle) and
disassemble Wireless Cover.

2. Unscrew 1 Nut and 1 Washer (as yellow
circle).

P7280/P7270I/P7280 Refresh/P7270I Refresh/P7290

Condential 2-5

3. Disassemble the Antenna Cable (as
green square).

4. Unscrew 3 screws (as green circle).

5. Unplug 1 connector (as blue square).

6. Disassemle Wireless Module.

Note : The Antenna Cable must press down
the PCBA and enter from the right of
PCBA , exit from the left of PCBA (as
green arrows).

NOTE: Circuit boards > 10 cm² has been highlighted with the yellow rectangle as

above image shows. Please detach the Circuit boards and follow local
regulations for disposal.

P7280/P7270I/P7280 Refresh/P7270I Refresh/P7290

Condential 2-6

2-5 Disassemble Top

Shielding Module

1. Unscrew 10 screws(as red circle).

2. Unscrew 1 screw (as yellow circle).

3. Unplug 1 connector (as red square) and
disassemble the Top Shielding Module.

A

A

P7280/P7270I/P7280 Refresh/P7270I Refresh/P7290

Condential 2-7

4. Unplug 1 FPC Cable (as yellow square).

5. Tear off 1 White Mylar (as green square)
and 3 EMI Tapes (as blue square).

P7280/P7270I/P7280 Refresh/P7270I Refresh/P7290

Condential 2-8

6. Unscrew 4 screws (as green circle).

7. Disassemble Keypad Module from Top
Shielding Module.

8. Unscrew 6 screws (as blue circle).

9. Disassemble Keypad Board and separate
Keypad Parts.

Menu Key

Aspect key

Keypad Board

Resync Key

Power Key

NOTE: Circuit boards > 10 cm² has been highlighted with the yellow rectangle as

above image shows. Please detach the Circuit boards and follow local
regulations for disposal.

P7280/P7270I/P7280 Refresh/P7270I Refresh/P7290

Condential 2-9

2-6 Disassemble Zoom Ring

and Focus Ring

1. Pull up the Zoom Ring (as red arrow) to
disassemble Zoom Ring.

2. Grasp the Focus Ring and rotate 3
tenons counterclockwise to loose 3
tenons for disassemble Focus Ring (as
yellow arrow).

A

A

P7280/P7270I/P7280 Refresh/P7270I Refresh/P7290

Condential 2-10

2-7 Disassemble Back Cover

Module

1. Unscrew 2 screws (as red circle).

2. Unscrew 8 hex screws (as yellow circle).

3. Unscrew 3 screws (as green circle).

4. Disassemble the Back Cover Module.

Note: There are 1 tenon on each side when
you disassemble the Back Cover
Module (as red square)

P7280/P7270I/P7280 Refresh/P7270I Refresh/P7290

Condential 2-11

2-8 Disassemble Left and

Right Cover Module

1. Unscrew 3 screws on Right Cover (as
red circle).

2. Disassemble the Right Cover Module (as

green arrow) and tear off the Mylar (as
red square).

3. Unscrew 1 screw on Left Cover (as

yellow circle).

4. Disassemble the Left Cover Module (as

yellow arrow).

Note: There are 3 tenons on Left Cover
Module and the same of Right Cover
Module (as green square).

P7280/P7270I/P7280 Refresh/P7270I Refresh/P7290

Condential 2-12

2-9 Disassemble Front Cover

Module

1. Turn over the Projector and unscrew 4
screws (as red circle).

2. Unscrew 2 screws (as yellow circle).

3. Cut off Cable Tie (as red square).

4. Unplug 1 connector (as yellow square).

5. Disassemble the Front Cover Module.

6. Remove the Mylar (as green square).

7. Release 2 tenons (as blue square) and

disassemble the IR Sensor.

P7280/P7270I/P7280 Refresh/P7270I Refresh/P7290

Condential 2-13

2-10 Disassemble Front

Shielding

1. Unscrew 7 screws (as red circle).

2. Disassemble the Front Shielding.

A

A

B

C

B

C

P7280/P7270I/P7280 Refresh/P7270I Refresh/P7290

Condential 2-14

2-11 Disassemble Main Board

Module and I/O Board
Module

1. Unscrew 4 screws (as red circle).

2. Unplug 11 connectors (as yellow square).

Note: Add 1 connector (as orange square)
(only for P7280/P7280 Refresh/P7290)

3. Disassemble Main Board Module and I/O
Board Module.

A

Only for P7280/P7280 Refresh/P7290 (Blower Cable)

4. Tear off Mylar (as blue square) from I/O
Board.

5. Unscrew 2 screws (as yellow circle ) and
turn over Main Board then unscrew 1
screw (as green circle).

A

P7280/P7270I/P7280 Refresh/P7270I Refresh/P7290

Condential 2-15

6. Unplug 2 connectors (as green square).

7. Disassemble I/O Board Module from Main
Board Module.

8. Unscrew 2 Copper Holders (as green
circle).

9. Unscrew 3 Copper Holders (as blue circle).

NOTE: Circuit boards > 10 cm² has been highlighted with the yellow rectangle as

above image shows. Please detach the Circuit boards and follow local
regulations for disposal.

P7280/P7270I/P7280 Refresh/P7270I Refresh/P7290

Condential 2-16

2-12 Disassemble Shielding

Module

1. Unscrew 5 screws (as red circle).

2. Loose Interlock Switch (as red square).

3. Disassemble Shielding Module .First
Left side, then Right side.

B

A

P7280/P7270I/P7280 Refresh/P7270I Refresh/P7290

Condential 2-17

4. Unscrew 4 screws (as yellow circle) and
disassemble 2 Speakers.

5. Tear off the Mylar (as green square)

6. Disassemble 1 Spring (as yellow square)

7. Unscrew 3 screws (as green circle)

8. Disassemble Iron Sheet from the
Shielding Module.

B

A

P7280/P7270I/P7280 Refresh/P7270I Refresh/P7290

Condential 2-18

2-13 Disassemble LVPS

Module

1. Unscrew 2 screws to disassemble the
Blower (as red circle / only for P7280/
P7280 Refresh/P7290).

2. Tear off the Mylar (as red square).

3. Unscrew 1 ground screw (as yellow circle).

4. Unscrew 5 screws(as green circle).

5. Disassemble LVPS Shielding.

P7280/P7270I/P7280 Refresh/P7270I Refresh/P7290

Condential 2-19

6. Unplug 3 connectors (as green square)

(only for P7270I/P7270I Refresh)

7. Tear off Mylar and disassemble P7270I/

P7270I Refresh LVPS Module.

8. Unplug 2 connectors (as blue square)

(only for P7280/P7280 Refresh/P7290)

9. Tear off Mylar and disassemble P7280/

P7280 Refresh/P7290 LVPS Module.

P7270I/P7270I Refresh

P7280/P7280 Refresh/P7290

NOTE: Circuit boards > 10 cm² has been highlighted with the yellow rectangle as

above image shows. Please detach the Circuit boards and follow local
regulations for disposal.

P7280/P7270I/P7280 Refresh/P7270I Refresh/P7290

Condential 2-20

2-14 Disassemble Fan

Module

1. Unscrew 2 screws (as red circle).

2. Disassemble Fan Module.

P7280/P7270I/P7280 Refresh/P7270I Refresh/P7290

Condential 2-21

2-15 Disassemble Engine

Module

1. Unscrew 4 screws (as yellow circle).

E

C

2. Unscrew 4 screws (as green circle).

A

D

B

A

B

C

E

P7280/P7270I/P7280 Refresh/P7270I Refresh/P7290

D

Condential 2-22

3. Disassemble the Engine Module.

4. Tear off the Mylar (as red square).

5. Unscrew 1 screw (as red circle) and
disassemble the Thermal Switch.

P7280/P7270I/P7280 Refresh/P7270I Refresh/P7290

Condential 2-23

2-16 Disassemble Color
Wheel Module

1. Unscrew 2 screws (as yellow circle).

2. Disassemble the Color Wheel Module.

3. Unscrew 1 screw (as green circle).

4. Disassemble the Photo Sensor Board.

P7280/P7270I/P7280 Refresh/P7270I Refresh/P7290

Condential 2-24

2-17 Disassemble DMD
Board and DMD Chip

1. Unscrew 4 screws (as blue circle).

2. Disassemble Heat Sink.

3. Unscrew 4 hex screws (as orange circle).

4. Disassemble DMD Board and DMD Chip.

5. Unscrew 1 screw (as green square).

6. Disassemble the Iron from DMD Board.

NOTE: Circuit boards > 10 cm² has been

highlighted with the yellow rectangle
as above image shows. Please
detach the Circuit boards and follow
local regulations for disposal.

P7280/P7270I/P7280 Refresh/P7270I Refresh/P7290

Condential 2-25

2-18 Disassemble Lamp
Blower Module

1. Unscrew 2 screws (as red circle).

2. Disassemble Lamp Blower Module and

separate the Blower from the Rubber.

Note: Avoid to press the Blower with great
strength.

P7280/P7270I/P7280 Refresh/P7270I Refresh/P7290

Condential 2-26

2-19 Disassemble ROD
Blower Module

1. Unscrew 2 screws (as yellow circle).

2. Disassemble ROD Blower Module and

separate the Blower from the Rubber.

Note: Avoid to press the Blower with great
strength.

P7280/P7270I/P7280 Refresh/P7270I Refresh/P7290

Condential 2-27

2-20 Disassemble ROD Duct

1. Unscrew 1 screw (as red circle).

2. Disassemble the ROD Duct.

P7280/P7270I/P7280 Refresh/P7270I Refresh/P7290

Condential 2-28

2-21 Disassemble System
Duct Module

1. Unscrew 2 screws (as yellow circle) to

loose the Lamp Cable.

2. Unscrew 1 screw (as green circle) from

the Bottom Cover.

3. Disassemble System Duct Module.

4. Unscrew 3 screws (as blue circle).

5. Disassemble System Duct Top and

Bottom Cover.

P7280/P7270I/P7280 Refresh/P7270I Refresh/P7290

Condential 2-29

2-22 Disassemble Lamp
Driver Module

1. Unscrew 4 screws (as red circle)

(only for P7270I/P7270I Refresh).

2. Disassemble P7270I/P7270I Refresh

Lamp Driver Module.

3. Unscrew 3 screws (as yellow circle)

(only for P7280/P7280 Refresh/P7290).

4. Disassemble P7280 /P7280 Refresh/

P7290 Lamp Driver Module and tear off
the Mylar (as red square).

P7270I/P7270I Refresh

P7280/P7280 Refresh/P7290

NOTE: Circuit boards > 10 cm² has been highlighted with the yellow rectangle as

above image shows. Please detach the Circuit boards and follow local
regulations for disposal.

P7280/P7270I/P7280 Refresh/P7270I Refresh/P7290

Condential 2-30

2-23 Disassemble Lamp
Driver Holder (only for
P7270I/P7270I Refresh)

1. Unscrew 2 screws (as green circle).

2. Disassemble Lamp Driver Holder.

Note: There is 1 Plastic Holder for P7280/P7280
Refresh/P7290 (as red square).

P7270I/P7270I Refresh

P7280/P7280 Refresh/P7290

P7280/P7270I/P7280 Refresh/P7270I Refresh/P7290

Condential 2-31

2-24 Disassemble Interrupt

Switch Module

1. Unscrew 1 screw (as red circle) and
disassemble 1 Interrupt Switch Module on
each side.

2. Use Tweezers to loose 2 tenons (as yellow
circle) and disassemble the Interrupt
Switch from the Holder.

P7280/P7270I/P7280 Refresh/P7270I Refresh/P7290

Condential 2-32

2-25 Disassemble Elevator

Module

1. Unscrew 3 screws (as red circle) and

disassemble 1 Spring (as red square) on
each side.

2. Disassemble Elevator Module.

3. Loose 2 tenons (as yellow circle).

4. Separate Holder and Elevator Key.

5. Disassemble Foot Rubber on Elevator

Foot.

P7280/P7270I/P7280 Refresh/P7270I Refresh/P7290

Condential 2-33

2-26 Rod Adjustment

1. Environment adjustment

- The distance between the engine and

the screen is 1.91M.

- This process should be done at a dark

environment. (under 5 Lux)

2. Procedure adjustment

- Change the screen to “white screen.”

- Adjust the screws by using the rod on

the engine module to readjust the image.
(adjust until the yellowish or bluish parts
disappeared.)

3. Abnormal image inspection

Screw 2

- It should not have any abnormal color

at the rim of the image by estimating
through the eyes.

Note: - To avoid over adjusting the rod.

- “Screw 1” should be adjusted rst, and

then adjust the “Screw 2”. After the

adjustment, use the glue to x the screws.

Screw 1

P7280/P7270I/P7280 Refresh/P7270I Refresh/P7290

Condential 2-34

2-27 Re-write Lamp Usage

Hour

- Take P7280 for example, P7270I/P7270I

Refresh is the same as P7280/P7280 Refresh/
P7290.

1. Get into service mode

- Press (power→left→left→menu) to get

into service mode.

2. Use left or right key to re-write the lamp

hour back to previous lamp usage hour.

3. Choose exit

Note: left key = decrease lamp hour
right key =increase lamp hour

Re-write lamp

usage hour

P7280/P7270I/P7280 Refresh/P7270I Refresh/P7290

Condential 2-35

2-28 Assemble Elevator

Module

1. Assemble Foot Rubber on Elevator Foot,

fasten 2 tenons (as green circle) to
assemble Holder and Elevator Key.

2. Assemble Elevator Module.

3. Assemble 1 spring (as red square) and 3

screws on each side (as red circle).

Note: The Elevator KEY installed in the direction
(inward side of the ramp) (as yellow square)

P7280/P7270I/P7280 Refresh/P7270I Refresh/P7290

Condential 2-36

2-29 Assemble Interrupt
Switch Module

Holder

1. Fasten 2 tennons (as yellow circle) and

assemble the Interrupt Switch on the
Holder.

2. Assemble 1 Interrupt Switch and screw 1

screw (as red circle) on each side

2-30 Assemble Lamp Driver

Interrupt Switch

Holder (only for P7270I/
P7270I Refresh)

1. Assemble the Lamp Driver Holder and
screw 2 screws (as green circle)

P7270I/P7270I Refresh

P7280/P7270I/P7280 Refresh/P7270I Refresh/P7290

Condential 2-37

2-31 Assemble Lamp Driver
Module

1. Assemble P7270I/P7270I Refresh Lamp

Driver Module and screw 4 screws (as
red circle).

2. Paste Mylar and assemble P7280/P7280

Refresh/P7290 Lamp Driver Module and
screw 3 screws (as yellow circle)

Note: 1. The Mylar holes must consistent with
Lamp Driver PCBA Holes when soak
Mylar (as yellow arrow)

2. 2P and 5P Wires’s position when

assemble 2P and 5P Wires
(as red and yellow square)

P7270I/P7270I Refresh

2P Wire

5P Wire

P7270I/P7270I Refresh

P7280/P7280 Refresh/P7290

P7280/P7270I/P7280 Refresh/P7270I Refresh/P7290

5P Wire

2P Wire

P7280/P7280 Refresh/P7290

Condential 2-38

2-32 Assemble System Duct
Module

1. Assemble System Duct Top and Bottom

Cover and screw 3 screws (as blue circle).

2. Assemble System Duct Module on Bottom

Cover and screw 1 screw (as green circle).

3. Assemble Lamp Cable and screw 2 screws

(as yellow circle).

P7280/P7270I/P7280 Refresh/P7270I Refresh/P7290

Condential 2-39

2-33 Assemble ROD Duct

1. Assemble the ROD Duct and screw 1
screw (as red circle).

2-34 Assemble ROD Blower
Module

1. Assemble ROD Blower on the Rubber.

2. Screw 2 screws (as yellow circle).

Note: Avoid to press the Blower with great
strength.

P7280/P7270I/P7280 Refresh/P7270I Refresh/P7290

Condential 2-40

2-35 Assemble Lamp Blower
Module

1. Assemble Lamp Blower on the Rubber.

2. Screw 2 screws (as red circle).

Note: Avoid to press the Blower with great
strength.

2-36 Assemble DMD Board
and DMD Chip

1. Assemble the Iron on DMD Board and
screw 1 screw (as yellow square)

2. Assemble the DMD Board and DMD Chip
and other parts and screw 4 screws
(as orange circle)

3. Assemble Heat Sink and screw 4 screws
(as blue circle)

P7280/P7270I/P7280 Refresh/P7270I Refresh/P7290

Condential 2-41

2-37 Assemble Color Wheel
Module

1. Assemble Photo Sensor Board and screw

1 screw (as green circle).

2. Assemble Color Wheel Module and screw

2 screws (as yellow circle).

2-38 Assemble Thermal
Switch

1. Assemble Thermal Switch and screw 1

screw (as red circle).

P7280/P7270I/P7280 Refresh/P7270I Refresh/P7290

Condential 2-42

2-39 Assemble Engine
Module

1. Paste the Mylar (as red square).

2. Assemble the Engine Module.

3. Screw 4 screws (as red circle).

4. Screw 4 screws (as yellow circle).

A

A

B

D

C

E

B

C

P7280/P7270I/P7280 Refresh/P7270I Refresh/P7290

D

E

Condential 2-43

2-40 Assemble Fan Module

1. Assemble the Fan Module and screw 2

screws (as red circle).

P7280/P7270I/P7280 Refresh/P7270I Refresh/P7290

Condential 2-44

2-41 Assemble LVPS Module

1. Paste Mylar and assemble P7270I/P7270I
Refresh LVPS Module.

2. Insert 3 connectors (as yellow square/only
for P7270I/P7270I Refresh).

3. Paste Mylar and assemble P7280/P7280
Refresh/P7290 LVPS Module.

4. Insert 2 connectors (as blue square/ only
for P7280/P7280 Refresh/P7290).

P7270I/P7270I Refresh

P7280/P7280 Refresh/P7290

P7280/P7270I/P7280 Refresh/P7270I Refresh/P7290

Condential 2-45

5. Assemble LVPS Shielding and screw 5
screws (as green circle) and 1 ground
screw (as yellow circle).

6. Paste Mylar (as red square) and assemble
LVPS Fan and screw 2 screws (as red
circle / only for P7280/P7280 Refresh/
P7290)

Note: The 16P Wire must be come out from the
middle of Two Holders (as yellow square).

16P Wire

P7280/P7270I/P7280 Refresh/P7270I Refresh/P7290

Condential 2-46

2-42 Assemble Shielding
Module

1. Assemble Iron Sheet on the Shielding

Module and screw 3 screws (as green
circle).

2. Assemble 1 Spring (as yellow square).

3. Paste 1 Mylar (as green square).

4. Assemble 1 Speaker and screw 2 screws

on each side (as yellow circle).

A

B

B

A

P7280/P7270I/P7280 Refresh/P7270I Refresh/P7290

Condential 2-47

5. Assemble Interlock Switch (as red square)

and the Shielding Module.

6. Screw 5 screws (as red circle) on Left and

Right side.

P7280/P7270I/P7280 Refresh/P7270I Refresh/P7290

Condential 2-48

2-43 Assemble Main Board
Module and I/O Board
Module

1. Screw 3 Copper Holders (as blue circle)

on Main Board.

2. Screw 2 Copper Holders (as green circle)

on I/O Board.

3. Insert 2 connectors (as green square)

and assemble I/O Board Module on Main
Board Module.

P7280/P7270I/P7280 Refresh/P7270I Refresh/P7290

Condential 2-49

4. Screw 3 screws (as yellow circle) and

paste Mylar (as blue square).

5. Assemble Main Board Module.

6. Insert 11 connectors (as yellow square)

and screw 4 screws (as red circle).

Note: Add 1 connector (as orange square)
(only for P7280/P7280 Refresh/P7290).

A

Only for P7280/P7280 Refresh/P7290 (Blower Cable)

P7280/P7270I/P7280 Refresh/P7270I Refresh/P7290

A

Condential 2-50

2-44 Assemble Front
Shielding

1. Assemble the Front Shielding.

2. Screw 7 screws (as red circle).

C

A

A

P7280/P7270I/P7280 Refresh/P7270I Refresh/P7290

B

B

C

Condential 2-51

2-45 Assemble Front Cover
Module

Mylar

1. Assemble the IR Sensor and paste the

Mylar (as green square).

2. Insert 1 connector (as yellow square) and

bundle up Cable Tie (as red square).

3. Screw 2 screws (as yellow circle) and

turn over the Projector.

4. Screw 4 screws (as red circle).

IR Sensor

P7280/P7270I/P7280 Refresh/P7270I Refresh/P7290

Condential 2-52

2-46 Assemble Left and Right
Cover Module

1. Assemble the Left Cover Module (as

yellow arrow) and screw 1 screw
(as yellow circle).

2. Paste the Mylar (as red square)

3. Assemble the Right cover Module (as

green arrow) and screw 3 screws (as red
circle).

Note: There are 3 tenons on Left Cover Module
and the same of the Right Cover Module
(as green square)

P7280/P7270I/P7280 Refresh/P7270I Refresh/P7290

Condential 2-53

2-47 Assemble Back Cover
Module

1. Assemble the Back Cover.

2. Screw 3 screws (as green circle).

Note: There are 1 tenons on each side when
you assemble the Back Cover (as red
square)

P7280/P7270I/P7280 Refresh/P7270I Refresh/P7290

Condential 2-54

3. Screw 8 hex screws (as yellow circle).

4. Screw 2 screws (as red circle).

2-48 Assemble Zoom Ring
and Focus Ring

1. Grasp the Focus Ring and rotate 3 tenons

clockwise to fasten 3 tenons for assemble
Focus Ring (as yellow arrow).

2. Press the Zoom Ring (as red arrow).

P7280/P7270I/P7280 Refresh/P7270I Refresh/P7290

Condential 2-55

2-49 Assemble Top Shielding
Module

Menu Key

1. Assemble Keypad Board and Keypad
Parts.

2. Screw 6 screws (as blue circle).

3. Assemble Keypad Module on the Top
Shielding Module.

4. Screw 4 screws (as green circle).

Keypad Board

Aspect key

Power Key

Resync Key

P7280/P7270I/P7280 Refresh/P7270I Refresh/P7290

Condential 2-56

5. Paste 1 White Mylar (as green square)
and 3 EMI Tapes (as blue square).

6. Insert 1 FPC Cable (as yellow square).

7. Insert 1 connector (as red square) and
assemble the Top Shielding Module.

8. Screw 10 screws (as red circle).

9. Screw 1 screw (as yellow circle).

P7280/P7270I/P7280 Refresh/P7270I Refresh/P7290

Condential 2-57

2-50 Assemble Wireless
Module (only for P7270I/
P7270I Refresh)

1. Insert 1 connector (as yellow square).

2. Screw 3 screws (as green circle).

3. Assemble the Antenna Cable (as green
square) and screw 1 Washer and 1 Nut
(as yellow circle).

P7280/P7270I/P7280 Refresh/P7270I Refresh/P7290

Condential 2-58

4. Assemble Wireless Cover and screw 3
screws (as red circle).

Note: The Antenna Cable must press down the
PCBA and enter from the right of PCBA ,
exit from the left of PCBA (as yellow arrow)

P7280/P7270I/P7280 Refresh/P7270I Refresh/P7290

Condential 2-59

2-51 Assemble Lamp Module

1. Assemble Lamp Module and screw 2
screws (as yellow circle).

2. Assemble the Lamp Cover and screw 4
screws (as red circle).

P7280/P7270I/P7280 Refresh/P7270I Refresh/P7290

Condential 2-60

2-52 Assemble Top Cover
Module

1. Assemble 1 Hinge and screw 2 screws

(as red circle) on each side.

P7280/P7270I/P7280 Refresh/P7270I Refresh/P7290

Condential 2-61

. Assemble the Top Cover and screw 4

2

screws (as yellow circle).

3. Push down the Front Cover and the

assembly completed.

P7280/P7270I/P7280 Refresh/P7270I Refresh/P7290

Condential 2-62

Chapter 3

Troubleshooting

3-1 LED Lighting Message

Lamp LED Temp LED Power LED

Message

Red Red Red Blue

Standby
(power cord plugged in)

Power button ON X X X V

Lamp retry X X X

Turning off (cooling state) X X

Turning off (cooling completed) X X V X

Error (thermal failure) X V X V

Error (fan failure) X

X X V X

Quick

ashing

Quick

ashing

Quick

ashing

X V

X

Error (lamp failure) V X X V

Error (color Wheel failure)

Note: "

Steady light, "

V" →

X" →→

P7280/P7270I/P7280 Refresh/P7270I Refresh/P7290 Condential

No light

Quick

ashing

X X V

3-1

3-2 Main Procedure

No Symptom Procedure

- Ensure the Power Cord and AC Power Outlet are securely con-

nected

- Ensure all connectors are securely connected and aren’t broken

1 No Power

- Check Lamp Driver

- Check LVPS

- Check Main Board

- Check LED Status

a. Thermal/Fan Failure: Temp LED (lights red or ashes red),
Power LED (lights blue)

- Check Thermal Switch

- Check Fan

- Check Main Board

2 Auto Shut Down

3 No Light On

b. Lamp Failure: Lamp LED (lights red), Power LED (lights blue)

- Check Lamp

- Check Lamp Driver

- Check Main Board

c. Color Wheel Failure: Lamp LED (quick ashing red), Power
LED (lights blue)

- Check Color Wheel

- Check Photo Senor

- Check Main Board

- Ensure all connectors are securely connected and aren’t broken

- Check Lamp cover

- Check Interrupt Switch

- Check Lamp Module

- Check Lamp Driver

- Check LVPS

- Check Main Board

- Check Color Wheel

- Check Photo Sensor Board

P7280/P7270I/P7280 Refresh/P7270I Refresh/P7290 Condential

3-2

No Symptom Procedure

- Ensure the Signal Cable and Source work
(If you connect multiple sources at the same time, use the
“Source” button switch)

- Ensure all connectors are securely connected and aren’t
broken

- Check Main Board

4 No Image

5 Mechanical Noise

6 Line Bar/Line Defect

- Check DMD Board

- Check I/O Board

- Check DMD Chip

- Check Engine Module

- Check Wireless Module and IP address (If you use WLAN or
LAN to transfer signal)

- Check Color Wheel

- Check Fan Module

- Check if the Main Board and the DMD Board are

assembled properly

- Check Main Board

- Check DMD Board

- Check DMD Chip

- Do “Reset (All data)” of the OSD Menu

7 Image Flicker

8 Color Abnormal

P7280/P7270I/P7280 Refresh/P7270I Refresh/P7290 Condential

- Ensure that the signal cables and source are work as well

- Check Lamp Module

- Check Color Wheel

- Check Photo Sensor and clean Photo Sensor

- Check DMD Board

- Check Main Board

- Do “Reset (All data)” of the OSD Menu

- Adjust Color Wheel Index

- Check Main Board

- Check Color Wheel

3-3

No Symptom Procedure

- Ensure the projection screen without dirt

- Ensure the projection lens is clean

9

10

Poor Uniformity/

Shadow

Dead Pixel/Dust

(Out of spec.)

- Ensure the Brightness is within spec

- Check rod alignment

- Check Engine Module

- Ensure the projection screen without dirt

- Ensure the projection lens is clean

- Clean DMD Chip and Engine Module

- Check DMD Chip

- Check Engine Module

- Ensure that the signal cables and source work as well

11 Garbage Image

Remote Control/

12

Control Panel Failed

13 Function Abnormal

14 Audio Abnormal

- Check Main Board

- Check DMD Board

- Remote Control
a. Check Battery
b. Check Remote Control
c. IR receiver
d. Check Main Board

- Control Panel
a. Check FPC
b. Check Keypad
c. Check Main Board

- Do “Reset (All data)” of the OSD Menu

- Check Main Board

- Check DMD Board

- Ensure that the signal cables and source are work as well

- Cleak Speaker Module

- Check Main Board

P7280/P7270I/P7280 Refresh/P7270I Refresh/P7290 Condential

3-4

No Symptom Procedure

- An unique Universal Password which is printed on the

Security Card. This unique password is a back door of
Administrator Password which will be accepted by projector
anytime no matter what the Administrator Password is.

- How to get the Universal Password?

(1) Click the “AcerSNID”

(2) Input SNID number. (SNID number is on the Security
Card)

Forgetting Password

15

(administrator
Password)

Universal Password

16

Failure

(3) Click “Calculate”. Then the Universal Password will

appear.

- Please conrm whether the SNID number of Service Mode

is the same as the SNID number on the backside of projector?

- If not, please do the actions as below:

a. Execute the EDID Upgrade Procedure (refer to Chapter 6)
b. Execute “Un-lock SNID and Default Language Reset” (refer
to 6-6 of Chapter 6) (for P7280 Refresh/P7270I Refresh/
P7290)
c. Get into Service Mode to obtain the SNID number, then
calculate the Universal Password.

P7280/P7270I/P7280 Refresh/P7270I Refresh/P7290 Condential

3-5

No Symptom Procedure

- Ensure you have set up the right IP address and the

connection is OK(network LED should be light up)

17 WLAN&LAN Fail

(only for P7270I/
P7270I Refresh)

- Check the Antenna

- Check the Wireless Module

- Check the Main Board

3-3 Beep Sound

Power on (as soon as power button

So(0.3s)

pressed)
Power on (lamp lighting failed) 2 x {So(0.1s) – Off(0.1s)} per lighting failure

12s interval for each trial lighting. Max 4 times
of trial

Power on (lens cap was not opened, for
the model with sliding lens cover only)

2 x {So(0.1s) – Off(0.1s)} periodically per 3
seconds, Totally 5 cycles. Turn off projector
after 5 cycles.

Close lens cap while projector is operat-

ing (for the model with sliding lens cover
only)

2 x {So(0.1s) – Off(0.1s)} periodically per 3
seconds, Totally 5 cycles. Turn off projector

after 5 cycles.
Power off (power button pressed twice) So(0.3s)
Fan lock So(0.1s) periodically per second
Overheat 2 x {So(0.1s) – Off(0.1s)} periodically per

second
Lamp error 3 x {So(0.1s) – Off(0.1s)} periodically per

second
Lamp Life reminding 3 x {Do(0.2s) – Off(0.8s) – So(0.2s) –

Off(0.8s)} with reminding message
Presentation Timer (time is up) 3 x {Do(0.1s) – Off(0.9s)} - So(0.5s)

P7280/P7270I/P7280 Refresh/P7270I Refresh/P7290 Condential

3-6

Chapter 4

Function Test & Alignment Procedure

4-1 Test Equipment Needed

- IBM PC with XGA resolution and wireless card

- DVD player with Multi-system (NTSC/PAL/SECAM), equipped "Component", "S-Video",

"Composite" and "HDMI".

- HDTV Source (480P, 720P, 1080i)

- Minolta CL-100

- Quantum Data 802B or CHROMA2327 (Color Video Signal & Pattern Generator)

4-2 Service Mode

1. Turn on the projector

2. Do the following actions sequentially to get into service mode

(1) Press "Power→ Left→ Left→ Menu".

(2) Service mode will be shown.

(3) After conrming the conguration, press "Exit" to exit.

4-3 OSD Reset

1. After nal QC step, we have to erase all saved change again and restore the OSD default
setting. The following actions will allow you to erase all end-users' settings and restore the
default setting:

(1) Please get into OSD menu.

(2) To execute "Reset" function.

P7280/P7270I/P7280 Refresh/P7270I Refresh/P7290 Condential

4-1

4-4 Test Condition

- Circumstance brightness: Dark room less than 5.0 lux.

- Inspection distance: 1.8m~2.5m functional inspection.

- Screen size: 60 inches diagonal

- After repairing each P7280/P7270I/P7280 Refresh/P7270I Refresh/P72�0, the unit should beP7280/P7270I/P7280 Refresh/P7270I Refresh/P72�0, the unit should be, the unit should be

run-in (refer to the table below)

Symptom Run-in Time
Normal repair 2 hours
NFF 4 hours
Auto shut down 6 hours

- Get into Burn-In Mode

* Cycle setting is based on the defect symptoms. ie: If it is NFF, the run-in time is 4 hours. You have

to set the lamp on for 50 min. and lamp off for 10 min for 4 cycles.

Press power→ left→ left→ Menu

Choose Burn-In Test→ enter

Lamp On (Min) Press right key to adjust the time (50)

Lamp Off (Min) Press right key to adjust the time (10)

Set burn in cycle Press right key to adjust the cycle

After setting up the time, choose Burn-In mode and press enter

Screen Defects (While replacing DMD Chip, DMD BD and MB)

Frame

< Figure: Zone A, Zone B & Frame (as green line) Denition, Active area=Zone A+ Zone B >

P7280/P7270I/P7280 Refresh/P7270I Refresh/P7290 Condential

4-2

Defect specication table

Order Symptom Pattern Criteria

1 Bright pixel ( dots)
2 Dark pixel(dots) White pattern A+B ≤ 5

Black pattern

A+B=0

( IRE=O)

3 Bright blemish Gray 10 pattern

4 Dark blemish Blue 60 pattern

5 Bright dot on frame Black pattern ≤ 1

6 Unstable pixel White & Black pattern A+B ≤ 1

7 Adjacent dark pixel White & Black pattern A+B = 0

4-5 Test Inspection Procedure

Change parts

Update

Version Update v v

Main Board Firmware

Color

Wheel

Lamp

Module

A+B ≤ 10
(diameter< 1/2 inch)

A+B ≤ 10
(diameter< 1/2 inch)

EDID

Lamp

Driver

Color Wheel Index v v

Reset lamp hour v

OSD Reset v v

EDID v

Re-write Lamp

Hour Usage

Default Language

Reset (for refresh

modules)

Waveform

Download(for

refresh models)

Note: - If Color appears abnormal after changing Main Board Module, please do Color Wheel index
adjustment.

- After changing parts, check the information above.

P7280/P7270I/P7280 Refresh/P7270I Refresh/P7290 Condential

v

v v v

v

4-3

4-6 PC MODE

1. Frequency and tracking boundary

Procedure - Test equipment: video generator.

- Test signal: analog 1024 x 768@60Hz

- Test Pattern: general-1 or master

- Check and see if the image sharpness is well-

performed.

- If not re-adjust by the following steps:

(1) Select "Frequency" function to adjust the

total pixel number of pixel clock in one line
period.

(2) Select "Tracking" function and use right or

left arrow key to adjust the value to minimize
video icker.

- Adjust Resync or Frequency/Tracking/H. Posi-

tion/V. Position to the inner screen.
Inspection item - Eliminate visual wavy noise by Resync,
Frequency or Tracking selection.

- Check if there is noise on the screen.

- Horizontal and vertical position of the video

should be adjustable to the screen frame.
Criteria - If there is noise on the screen, the product is

considered as failure product.

- If there is noise on the screen, use auto or

manual “frequency” function or “tracking” func-

tion to adjust the screen.

- The PC mode functionally sure be workable

include support format with frequency and auto

detected functional will be workable.

General-1

Master

2. Bright Pixel

Procedure - Test equipment: video generator

- Test signal: analog 1024 x 768@60Hz

- Test Pattern: Full black
Inspection item - Bright pixel check.
Criteria - Bright pixel is unacceptable in the active zone 1

pixel is allowed on the frame.

- Adjacent pixels are unacceptable.

- If there is blemish on full black pattern, please

P7280/P7270I/P7280 Refresh/P7270I Refresh/P7290 Condential

Full black

4-4

use gray 10 pattern to judge it.

- Ref. Defect specication table

3. Dark Pixel

Procedure - Test equipment: video generator

- Test signal: analog 1024 x 768@60Hz

- Test Pattern: Full white
Inspection item - Dark pixels check.

- White pattern (IRE=100)
Criteria - The dark pixel should be no more than 5 under

full white pattern.

- Adjacent pixels are unacceptable.

- Ref. Defect specication table

4. Bright Blemish

Full white

Procedure - Test equipment: video generator

- Test signal: analog 1024 x 768@60Hz

- Test Pattern: Gray 10
Inspection item - Bright blemish check.
Criteria - The bright blemish should be no more than 10

under gray 10 pattern.

- Ref. Defect specication table

5. Dark Blemish

Procedure - Test equipment: video generator

- Test signal: analog 1024 x 768@60Hz

- Test Pattern: Blue 60
Inspection item - Dark blemish check.
Criteria - The dark blemish should be no more than 10

under blue 60 pattern.

- Ref. Defect specication table

Gray 10

Blue 60

6. Focus Test

Procedure - Test equipment: video generator

- Test signal: analog 1024 x 768@60Hz

P7280/P7270I/P7280 Refresh/P7270I Refresh/P7290 Condential

4-5

- Test Pattern: Full screen
Inspection item - Focus check
Criteria - From screen 1.�1 M via visual to check the
focus, look at the entire screen, focus shall

be clear, crisp, and sharp over the entire surface
of the display pattern. (Blur word on one of the
corner after adjustment is acceptable. However,
the word should at least be recognizable.)

7. Color Performance

Procedure - Test equipment: video generator.

- Test signal: 480p, 720p, 1080p

- Test Pattern: Master, 64 gray RGBW or

SMPTE bar
* Please refer to 4-2 to get into service mode.

Use 720p & 1080p signal, master pattern to do
HDTV test. Color cannot discolor to purple and
blue.

Inspection item - Check if each color level is well-functioned.

- Color saturation
Criteria - Screen appears normal. It should not have any

abnormal condition, such as lines appear on the

screen and so on.

- Color appears normal.

- It is unacceptable to have few lines ashing.

- RGBW should all appear normal on the screen

and sort from R -G-B-W.

- Color levels should be sufcient and normal.
(The unidentied color levels on both left and

right sides should not over 4 color levels.)

- Gray level should not have abnormal color or

heavy lines.

- If color appears abnormal, please get into

service mode to do color wheel index adjust-

ment.

Full screen

Master

64 gray RGBW

SMPTE BAR

P7280/P7270I/P7280 Refresh/P7270I Refresh/P7290 Condential

4-6

4-7 Video Performance

1. CVBS

Procedure - Test equipment: DVD player

- Test signal: CVBS
Inspection item - Video performance test
Inspection Distance - 1.8M ~2.5M
Criteria - Check any abnormal color, line distortion or any

noise on the screen.

- Check the sound from speakers.

2. S-Video

Procedure - Test equipment: DVD player

- Test signal: S-Video
Inspection item - Video performance test
Inspection Distance - 1.8M ~2.5M
Criteria - Check any abnormal color, line distortion or any

noise on the screen.

- Check the sound from speakers.

Motion video

3. HDTV/Component

Procedure - Test equipment: DVD player

- Test signal: Ycbcr/YPbPr
Inspection item - HDTV performance test
Inspection Distance - 1.8M ~2.5M
Criteria - Check any abnormal color, line distortion or any

noise on the screen.

- Check the sound from speakers.

4. Audio Test

Procedure - Test equipment: DVD player

- Test signal: CVBS
Inspection item - Audio performance test
Inspection Distance - 1.8M ~2.5M
Criteria - Check the sound from speakers.

P7280/P7270I/P7280 Refresh/P7270I Refresh/P7290 Condential

4-7