bs275-bx275 servicmanual v5.0

SERVICE MANUAL

prepared: Check: Approved: Alex

Date Revise Version Description

2010.4.14 V1.0 Initial Issue

2011.11.18 V2.0

According to the customer whole enginge module requirement to revise service manual,the contents as following: 1.Cancel charpter 2-13(Disassemble color wheel mod-ule). 2.Cancel charpter 2-14(Disassemble DMD chip and DMD board).3.Cancel No.5,6,7,19,20 parts and modify No.18 part number in appendix A

2011.12.1 V3.0

According to the customer requirement to add contents as following:1.Add charpter 2-13(Disassemble color wheel module). 2.Add charpter 2-14(Disassemble DMD chip and DMD board).3.Add No.5,6,7,19,20 parts number in appendix A

2012.1.31 V4.0 Modify No.5,21 parts number in appendix A

2012.3.19 V5.0 1.Add No.31,32 parts number in appendix A 2.Add new photo sensor rework SOP in appendix C

Copyright March. 2012. All Rights Reserved

ConfidentialBS275/BX275

Preface

This manual is applied to BS275/BX275 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.

BS275/BX275 Service Manual

Copyright March., 2012.

All Rights Reserved

Manual Version 5.0

I

BS275/BX275 Confidential

BS275/BX275 Comparison List

PARTS BS275 BX275

Main BD 80.8HC01G003 80.8HF01G003Top Cover 51.8HC01G001 51.8HC01G011DMD 48.8EH01G001 48.8CQ01G003Engine 70.8HC13GR01 70.8HF05GR01

II

ConfidentialBS275/BX275 III

Table of Content

Chapter 1 Introduction Highlight 1-1

Compatible Mode 1-4

Product Overview 1-6

Remote control battery installation 1-12

Chapter 2 Disassembly Process Equipment Needed & Product Overview 2-1

Disassemble Lamp Cover Module 2-2

Disassemble Lamp Module 2-2

Disassemble Top Cover Module 2-3

Disassemble Zoom Ring Module 2-3

Disassemble Keypad Board Module 2-4

Disassemble Top Shielding 2-4

Disassemble IO Cover 2-5

Disassemble Main Board Module 2-5

Disassemble Main Board Shielding 2-6

Disassemble Front Cover Module and IR Sensor Board 2-8

Disassemble Engine Module 2-8

Disassemble Color Wheel Module 2-9

Disassemble DMD Chip and DMD Board 2-9

Disassemble Focus Ring 2-10

Disassemble Fan Module and Thermal Switch 2-10

Disassemble Blower Module 2-12

Disassemble LVPS Module 2-12

Disassemble Lamp Driver 2-13

BS275/BX275 Confidential IV

Disassemble Interlock Switch 2-14

Disassemble Bottom Shielding 2-15

Disassemble Speaker 2-15

Disassemble Bottom Cover Module 2-16

Rod Adjustment 2-17

Re-write Lamp Usage Hour 2-19

Chapter 3 Troubleshooting

LED Lighting Message 3-1

Main Procedure 3-2

Chapter 4 Function Test & Alignment Procedure

Test Equipment Needed 4-1

Service Mode 4-1

OSD Reset 4-1

Factory Fan RPM Reset 4-2

Test Condition 4-2

Test Inspection Procedure 4-4

PC MODE 4-5

Video Performance 4-8

Calibration 4-10

Optical Performance Measure 4-12

Chapter 5 Firmware Upgrade Section 1: System Firmware Upgrade 5-1

Equipment Needed 5-1

DLP Composer Lite Setup Procedure 5-2

Get into FW mode 5-3

ConfidentialBS275/BX275

NLINK Setup Procedure 5-9

Manley USB Driver Upgrade Procedure 5-10

8051 Firmware Upgrade Procedure 5-13

Chapter 6 EDID Upgrade

EDID Introduction 6-1

Equipment Needed 6-2

Setup Procedure (VGA) 6-3

EDID Key-In Procedure 6-4

Appendix A Exploded Image I

Appendix B

Serial Number Definition I

PCBA Code Definition II

Appendix C

New photo sensor board Reworking SOP I

BS275/BX275 Confidential 1-1

Chapter 1

Introduction 1-1 Highlight

No Item Description

1 Technology ● 0.55” DMD 1 chip 2xLVDS (DarkChip3) S450

2 Dimension (W x D x H) ● 286.3*88.2*192 mm (without protruding parts)

3 Weight ● < 2.31Kg

4 Power Supply

● Universal AC 100--240V ~ 50 / 60 Hz with PFC input● 180W Lamp @ normal operation● 160W Lamp @ eco operation● Variance FAN speed control (Depend on temperature variance)

5 Keystone Correction ● +/ -15 degree Vertical

6 Resolution ● Native Resolution: 800 X 600

7 Brightness ● 2250 ANSI Lumens ( Typical )● 2000 ANSI Lumens ( Minimum )

8 Contrast ● 2200:1 (Full on/Full off)

9 Uniformity● 80% Typical (JBMA standard )● 65% Minimum (JBMA standard )

10 Throw ratio ● 1.95 ~ 2.15:1 distance/width @2.37m

11 Projection lens● F# 2.41-2.55, 1.10X Mechanical Zoom Lens. f=21.8-24mm @ 60”

12 Lamp life

● 3000 hours at typical full power mode.● 4000 hours at Eco mode (The more than 50% of lamp population have light out put>50% of initial min. Lumen output at the lamp life time.

13 Lens Offset ● 115%+/-5%

14 Video compatibility

● NTSC: M (3.58MHz), 4.43 MHz● PAL: B, D, G, H, I, M, N● SECAM: B, D, G, K, K1, L● HDTV: 480i/p, 576i/p, 720p(50/60Hz), 1080i/p(50/60Hz)


No Item Description

15 Terminals

● One D-Sub 15-pin female connector for VGA input and component video input● One Mini DIN 4-pin for S-Video Input● One RCA Jack for Composite Video Input● One Min-pin RS232 port for FW update● One D-Sub 15-pin female connector for VGA output● One Audio in 3.5mm mini-jack

16 System Controller ● TI DDP2431

17 Color Wheel ● 40mm diameter, 6 segments (R81Y41G84C31W52B71) & 7200 rpm

18 Lamp ● 180W Lamp (Osram E20.8)

19 Temperature● Operating: 5 ~ 35°C● Storage: -20 ~ 60°C

20 Altitude

● Operating: 0~2,500 ft, for 5°C~35°C 2,500~5,000 ft, for 5°C~30°C 5,000~10,000 ft, for 5°C~25°C● Storage 40,000 ft

21 Input Signal

● Computer analog input● Video● Analog RGB 0.7Vp-p, 75ohm● Sync • Hsync Freq. 31.35~91.1kHz • Vsync Freq. 56~85Hz● Separate Sync: (HV) TTL level (bi-polarity)● Composite Sync: TTL level (bi-polarity)● Sync-on-green: negative sync. 0.3Vp-p● Analog Video • Composite video 75ohm • S-video (Y/C) 75ohm • Component video (Y/Pb/Pr) 75ohm


No Item Description

22 Projection Distance ● 1.2~12m

23 Projection Screen Size ● Adjustable from 27.46” to 302.8” (Focus range)(Diagonal)

24 Color Wheel ● UL/ cUL, FCC B, TUV-GS & CB report, CE, C-Tick, CCC, KC, Gost-R, NOM, SASO

25 Audio speaker ● Built-in one 2W speaker

26 Projection method ● Desktop/Ceiling (Front/Rear)


1-2 Compatible Mode

Computer Compatibility (Analog)

Compatibility Resolution V-Sync [Hz]

VGA

640x350 70640x350 85640x400 85640x480 60640x480 72640x480 75640x480 85720x400 70720x400 85

SVGA

800x600 56800x600 60800x600 72800x600 75800x600 85

XGA

1024x768 601024x768 701024x768 751024x768 85

WXGA

1280x768 601280x768 751280x720 601280x800 60

SXGA

1152x864 601152x864 701152x864 751152x864 85

1280x1024 601280x1024 751280x1024 851280 x 960 60

SXGA+ 1400x1050 60


Compatibility Resolution V-Sync [Hz] UXGA 1600 x 1200 60

MAC LC 13” 640x480 66.66MAC II 13” 640x480 66.68MAC 16” 832x624 74.55MAC 19” 1024x768 75

MAC 1152x870 75.06MAC G4 640x480 60i Mac DV 1024x768 75i Mac DV 1152x870 75i Mac DV 1280x960 75

Note: If the Computer Compatibility supportive signal is different from User's Manual, please refer to User's Manual.


1-3 Product Overview

Projector OutlookFront /Upper side

Item Description Item Description1 Control Panel 6 Focus Ring2 Remote Sensor 7 Ventilation (outlet)3 Zoom Ring 8 Lens4 Ventilation (inlet) 9 Lens Cap5 Speaker


Rear side

Item Description Item Description1 RGB IN Connector 5 RGB OUT Connector2 S-VIDEO Connector 6 AUDIO-IN Jack3 VIDEO Connector 7 AC IN4 RS232C Service Port 8 KensingtonTM Lock


Control Panel

Item Function Description

1 POWER Power On/Off the Projector

2 POWER LED Indicate the projector’s status.3 LAMP LED Indicate the projector’s lamp status.4 TEMP LED Indicate the projector’s temperature status..

5 KEYSTONE Adjust the image to compensate for distortion caused by tilting the projector.

6Four DirectionalSelect Keys

Use to select items or make adjustments to your selection.

7 SOURCE Press “SOURCE” to select an input signal.

8 MENU Press “Menu” to launch the on-screen display (OSD) menu. To exit OSD, Press “Menu” again.

9 VOLUME Adjust to increase / decrease the volume.10 OK Confirm your item selection.

11 AUTOAutomatically synchronizes the projectorto the input source.


Remote Control Layout


Item Function Description

1Infraredtransmitter

Sends signals to the projector.

2 DIS-MODE Select the Image mode from Presentation,Bright, Movie, SRGB, Blackboard,Classroom, User1 and User2.

3 POWER Turning the Projector On/Off

4 COMPUTER Press “COMPUTER” to choose RGB IN connector.

5 FREEZE Pause the screen image. Press again to resume the screen image.

7 ENTER Confirm your section of items in sub menu operation.

8 SOURCE Press “SOURCE” to choose RGB, Component, S-Video and Composite sources.

9 MENUPress “MENU” to launch the Onscreendisplay (OSD), back to the top level of OSD for the OSD main menu operation

10 KEYSTONE - Adjust the image to compensate for distortion caused by tilting the projector.

11 AV-MUTE Momentarily turn off/on the audio and video.

12 RESET Return the adjustments and settings to the factory default val-ues. (except for lamp counter)

13VIDEO 1(S-VIDEO)

Press “VIDEO 1” to choose S-VIDEO connector.

14VIDEO 2(VIDEO)

Press “VIDEO 2” to choose VIDEO connector.

15 KEYSTONE + Adjust the image to compensate for distortion caused by tilting the projector.

16 D.ZOOM Zoom out or Zoom in the projector display.

17 Four Directional Select Keys

Use to select items or make adjustments to your selection.

18 RE-SYNCAutomatically synchronize the projectorto the input source.

19 SOURCE-LOCK This function detects the input signal automatically. When find-ing a signal, the search will stop.

20 VOLUME +/- Increase/decrease speaker volume.


Bottom Cover Dimension


1-4 Remote control battery installation

- Press firmly and slide the battery cover off.

- Install new battery (CR2025 type battery)into the compartment.Ensure that the side with a “+”

- Install new battery into the compartment.

BS275/BX275 Confidential 2-�

Chapter 2

Disassembly Process

2-1 Equipment Needed & Product Overview

1. Screw Bit (+): 105

2. Screw Bit (+): 107

3. Screw Bit (-): 107

4. Hex Sleeves 5 mm

5. Tweezers

6. Projector

* Before you start: This process is protective level II. Operators should wear electrostatic chains.

* Note: - If you need to replace the main board, you have to record the lamp usage hour.


2-2 Disassemble Lamp Cover Module

1. Loosen 2 screws (as red circle) on the Lamp Cover.

2. Disassemble the Lamp Cover Module and tear off the Aluminum foil.

2-3 Disassemble Lamp Module

1. Loosen 2 screws (as red circle) on the Lamp Module.

2. Take off the Lamp Module.


2-4 Disassemble Top Cover Module

1. Unscrew 2 screws (as red circle) from the Bottom Cover.

2. Unscrew 2 screws (as green circle) from the IO Cover .

3. Remove the Top Cover Module.

Note:When you disassemble the top cover, please pay attention to the tenons(as yellow square).

2-5 Disassemble Zoom Ring Module

1. Unscrew 7 screws (as red circle) from the Top Cover Module.

2. Remove the Zoom Ring Module.


2-7 Disassemble Top Shielding

1. Unscrew 9 screws (as red circle).

2. Disassembled the Top Shielding.

2-6 Disassemble Keypad Board Module

1. Unscrew 4 screws (as red circle) to disassemble Keypad Board Module.

2. Tear off 2 EMI gaskets from Keypad Board Module.

3. Separate Keypad Button from Top Cover Module.


2-8 Disassemble IO Cover

1. Unscrew 4 hex screws (as red circle).

2. Unfasten 2 tenons (as yellow square).

�. Disassembled the IO cover.

Note:Take care the tenons when you disassemble the unit.

2-9 Disassemble Main Board Module


2. Unplug 1 connector (as green square) of Color Wheel.

3. Unplug 6 connectors (as orange square).


Item Male Connector on Main Board The key feature Figure

A Lamp Driver Black wire tube (5 pin)

B Fan Compose of Red/Yellow/Black Wire (3 pin)

C BlowerCompose of Red/Black/White Wire, white connector and Black wire tube (3 pin)

D Photo SensorCompose of Red/Black/White Wire, red connector and Black wire tube (3 pin)

E IRCompose of Red/Black/White Wire, green connector and Black wire tube (3 pin)

F Speaker Compose of Red/Black Wire and Black wire tube (2 pin)

F E D C B A

Please refer to the table as below for details of each connector.


4. Unplug 1 connector (as yellow square).

5. Remove the Main Board.

2-10 Disassemble Main Board Shielding


2. Disassemble the Main Board Shielding.


2-11 Disassemble Front Cover Module and IR Sensor Board

1. Unscrew 1 screw (as red circle).

2. Unfasten 2 tenons (as green square).

3. Remove the Front Cover Module.

4. Unfasten 2 tenons (as green square) to disassemble the IR Sensor Board and IR Cover.

Note: - Take care the tenons when you disassemble the unit.

IR Cover

IR Sensor Board

2-12 Disassemble Engine Module

1. Unscrew 4 screws (as yellow circle) to disassemble the Engine Module.


2-13 Disassemble Color Wheel Module

1. Unscrew 2 screws (as red circle) to disassemble the Color Wheel Module.

2. Unscrew 1 screw (as blue circle) to disassemble the Photo Sensor Board from the Color Wheel Module.

Note: - Avoid touching the glass parts of color wheel.

2-14 Disassemble DMD Chip and DMD Board

1. Unscrew 2 screws (as red circle) to disassemble the Heat Sink and DMD Module.

2. Rotate the screw counterclockwise (as yellow circle) to disassemble the DMD Board and DMD Chip.

Note: - Avoid touching the DMD Chip when you disassemble it.

- Found that the DMD Chip has scrapes or dirt use of a magnifying glass, you may use an electrostatic ion gun to clean it.

- Pay attention to the fixed position when assembling the DMD Chip.


2-15 Disassemble Focus Ring

1. Unscrew 3 screws (as red circle) to disassemble the Focus Ring.

Focus Ring

2-16 Disassemble Fan Module and Thermal Switch

�. Unscrew 3 screws (as red circle).

2. Unscrew 1 screw (as orange circle).

3. Disassembled the Fan Module.

BS275/BX275 Confidential 2-��

Note: - Take the Fan Module as the right gesture.

the wrong gesturethe right gesture

4. Unscrew 4 screws (as blue circle) to disassemble the Fan Shielding and Fan.

5. Unscrew 1 screw (as green circle) to disassemble the Thermal Switch.

Thermal Switch

BS275/BX275 Confidential 2-�2

2-17 Disassemble Blower Module

1. Unscrew 3 screws (as red circle) to disassemble the Blower Module.

2. Seprate the Blower and Blower Rubber.

2-18 Disassemble LVPS Module


2. Unplug 3 connectors (as yellow square).

3. Cut off the cable tie (as green square).

4. Disassemble the LVPS Module, AC Inlet Bracket and LVPS to MB cable.

AC Inlet Bracket

LVPS to MB cable


Note: when you assemble the unit must do actions as below:

1. Use the cable tie to pierce the first hole of LVPS for binding the Interlock Switch and Lamp Driver to LVPS cable (as blue square).

2. Use clamp to fix the Lamp Driver to LVPS cable (as orange square).

2-19 Disassemble Lamp Driver

1. Unscrew 1 screw (as red circle) to disassemble the Lamp Driver Module.


Interlock Switch

2-20 Disassemble Interlock Switch

1. Unscrew 1 screw (as red circle) to disassemble the Interlock Switch.

Note: Make sure the Interlock Switch cable be wedged fillister as the picture shown.

Lamp Driver Lamp Driver Holder

2. Unscrew 4 screws (as yellow circle).

3. Unplug 3 connectors (as blue square).

4. Disassemble the Lamp Driver and Lamp Driver Holder.


2-21 Disassemble Bottom Shielding

1. Unscrew 3 screws (as red cricle) to disassemble the Bottom Shielding.

2-22 Disassemble Speaker

1. Unscrew 2 screws (as yellow circle) to disassemble the Speaker.


2-23 Disassemble Bottom Cover Module

1. Unscrew 3 nuts (as red circle) to remove the rubber adjust foot.


2-24 Rod Adjustment

1. Environment Adjustment

- The distance between the engine and the screen is 2.4 M.

- This process should be done at a dark environment (under 2 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.

("screw 1" should be adjusted first, and then "screw 2". Adjust until the yellowish or bluish parts disappeared.)

3. Abnormal image inspection

- 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. After the operation, please use the glue to fix the screws.

please refer to the blow table for rod adjustment:

Z type driver

Screw1Screw2


AdjustmentPart Screw direction

Screen StateDescription

Initial state State after adjusting

Right/Left screw1

Right(tighten direction)

When the right color band appeared,rotate scew1 clockwise,then the color band disap-peared.

Lift(loosen direc-tion

When the left color band appeared,rotate scew1 anti-clockwise,then the color band disappeared.

Up/Downscrew2

Right(tighten direction)

When the bottom color band appeared,rotate scew2 clockwise,then the color band disap-peared.

Lift(loosen direc-tion

When the top color band appeared,rotate scew2 anti-clockwise,then the color band disappeared.


2-25 Re-write Lamp Usage Hour

1.Press "Menu",when "OSD" is displayed.

- Use “Left” or “Right” key to select "OPTIONS" . - Use "UP" or "DOWN" key to select "Lamp settings",then press"OK". - Use"UP" or "DOWN" key to select "Eco Mode". - Use“Left” or “Right” key to select "on"or"off",then press "OK".

2. Get into service mode.

- Press Power --> Left --> Left --> Menu to get into service mode. - Use “Down” key to select “Exit" - Use “Left” or “Right” key to re-write the Normal Lamp hour or Eco Lamp hour.

Note:"Eco Mode" status is"on",you can Re- write Eco Lamp Hour. "Eco Mode"status is"off",you can Re-write Normal Lamp Hour. 3. Choose “Exit”, press “OK” to exit service mode.

Note: Reset the lamp hour counter after replacing the lamp.(as red square) Left key = decrease lamp hour Right key=increase lamp hour


Chapter 3

Troubleshooting

3-1 LED Lighting Message

MessagePower-LED LED

Green Amber LAMP(Red)

TEMP(Red)

Standby (Input power cable) O

Normal (Power on) O

Powering up (Warming up) Flashing O

Power off (Cooling-I: It can’t accept

any key at this status)Flashing O

Power off (Cooling-II: It can accept power key to turn on

the projector)O Flashing

Error (Lamp failed) O O O

Error (Fan lock) O O O Flashing

Error (Over temp.) O O O

Note:Steady by=> No light=>O


3-2 Equipment Needed

1. Projector

2. PC (Personal computer)

3. DVD player

4. Screw drivers

5. VGA cable, power cord, S-video cable,Video-cable, audio cable,

6. Voltage test meter

7. Oscilloscope


3-3 Main Procedure


3-4 Power troubleshooting


Power troubleshooting


3-5 Image troubleshooting


Image troubleshooting


3-6 Audio TroubleshootingTroubleshooting


3-7 Remote Troubleshooting


Chapter 4

Function Test & Alignment Procedure

4-1 Test Equipment Needed

- IBM PC with HDTV resolution

- DVD player with Multi-system, equipped “Component”, “Composite”, “S-Video” and “HDMI”.

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

- Minolta CL-100

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

4-2 Service Mode

1. Turn on the projector

2. Press “Power”, “Left”, “Left” and “Menu” buttons sequentially on keypad to get into service mode.

4-3 OSD Reset After final QC step, we have to erase all saved change again and restore the default setting: (1) Please get into OSD menu. (2) Execute “OSD reset” function under “Options”.


4-4 Factory Fan RPM Reset

After replace main board, fan or upgrade system FW, you need to do: Picture A

1. Plug in the power cord, hold on "left" button then press "power" button, when the power LED lighted green, Temp LED and Lamp LED lighted red about one second, loosen "left" button.

2. After the “Logo” disappeared, Picture A will be shown.

3. After several minutes, you can check the fan RPM as red circle. a.Please get into Service Mode (refer to 4-2) b.Select “Thermal Settings”, then press “OK”, Fan detail information will be shown.Note: 1.The steps must be finished in 50 seconds after powering on projector. 2. If the factory fan Value don’t show in service mode,please repeat the step 1,2 again.

4-5 Test Condition

- Circumstance brightness: Dark room less than 2 lux.- Inspection distance: 0.5m~1.0m functional inspection.- Screen size: 60 inches diagonal.- After repairing each unit, a Run-in test is necessary (refer to the below table).

Symptom Run-in TimeNormal repair 2 hoursNFF 4 hoursAuto shutdown 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 buttons sequentially on remote controller to get into service modeChoose Burn-In Test > enterLamp On Press right key to adjust the time (50)Lamp Off Press right key to adjust the time (10)Set burn in cycle Press right key to adjust the cycleAfter setting up the time, choose “Get into Burn-In Mode” and press enter

Picture A

Confidential 4-3BS275/BX275

Defect specification table

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

Screen Defects (While replacing DMD Chip, DMD Board and Main Board)

Frame

Order Symptom Pattern Criteria

� Bright pixel (dots) Gray 10 pattern A+B≤1

2 Dark pixel (dots) White pattern A+B ≤ 6

3 Bright blemish Gray 15 pattern A+B ≤ 10

4 Dark blemish Blue 60 pattern A+B ≤ 10

5 Bright dot on frame Gray 10 pattern ≤ 1

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

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


4-6 Test Inspection Procedure

UpdateChange Parts

Main Board FW Color

wheelLamp

moduleEngine module

Rod module Fan

FW Version Update(refer to chapter 5) V V

Color Wheel Index(refer to chapter 4-9)

V V

Lamp counter reset(refer to chapter 2-25) V

PC Calibration(refer to chapter 4-9) V V

Video Calibration(refer to chapter 4-9) V V

OSD Reset(refer to chapter 4-3) V VRe-write Lamp Hour

Usage(refer to chapter 2-25) V

EDID(refer to chapter 6) V

ROD Adjustment(refer to chapter 2-24) V V

Factory Fan RPM Reset

(refer to chapter 4-4) V V V

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

- After changing parts, check the information above table.


4-7 PC MODE

For BS275, the native resolution of test signal is 800x600@60HZ. BX275, the native resolution of test signal is 1024x768@60HZ

- We take BS275 for example here.

1. Frequency and tracking boundary

Procedure - Test equipment: video generator. - Test signal: analog 800 x 600@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 flicker.

- Adjust Resync or Frequency/Tracking/H. Position/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 con-

sidered as failure product. - If there is noise on the screen, use auto or manual

“frequency” function or “tracking” function to adjust the screen.

- The PC mode functionally sure be workable include support format with frequency and auto detected functional will be workable.

Master

General-1


2. Bright Pixel

Procedure - Test equipment: video generator. - Test signal: analog 800 x 600@60Hz - Test Pattern: gray 10Inspection item - Bright pixel check. Criteria - Bright pixel should be no more than 1 in the active

zone; 1 pixel is allowed on the frame. - Ref. Defect specification table

3. Dark Pixel

Procedure - Test equipment: video generator. - Test signal: analog 800 x 600@60Hz - Test Pattern: full whiteInspection item - Dead pixels check. - White pattern (IRE=100)Criteria - The dark pixel can accept no more than 6 dark pixels. - Adjacent pixels are unacceptable. - Ref. Defect specification table

4. Bright BlemishProcedure - Test equipment: video generator. - Test signal: analog 800 x 600@60Hz - Test Pattern: gray 15Inspection item - Bright blemish check. Criteria - The bright blemish should be no more than 10 under gray 15 pattern. - Ref. Defect specification table

5. Dark Blemish

Procedure - Test equipment: video generator. - Test signal: analog 800 x 600@60Hz - Test Pattern: blue 60

Full white

Gray 10

Gray 15


Inspection item - Dark blemish check Criteria - The dark blemish should be no more than 10 under blue 60 pattern. - Ref. Defect specification table

6. Focus Test

Procedure - Test equipment: video generator. - Test signal: analog 800 x 600@60Hz - Test Pattern: full screen Inspection item - Focus checkCriteria - From screen 2.6 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: 800 x 600@60Hz, 1080i - Test Pattern: Master, 64 gray RGBW * Please Use 800 x 600@60Hz signal & 64 gray

RGBW pattern and 1080i signal & master pat-tern to do color performance test. Color can not 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 flashing. - RGBW should all appear normal on the screen

and sort from R -G-B-W. - Color levels should be sufficient and normal.

Blue 60

Full screen

Master

64 gray RGBW


(The unidentified 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 ser-vice mode to do color wheel index adjustment.

4-8 Video Performance

1. CVBS

Procedure - Test equipment: DVD player - Test signal: CVBSInspection item - Video performance testInspection Distance - 1.8M ~2.8M Criteria - Check any abnormal color, line distortion or

any noise on the screen.

2. HDTV/ ComponentProcedure - Test equipment: DVD player - Test signal: Ycbcr/YPbPr Inspection item - HDTV performance testInspectionDistance - 1.8M ~2.8MCriteria - Check any abnormal color, line distortion or

any noise on the screen.

3. Audio Test

Procedure - Test equipment: DVD Player - Test signal: CVBSInspection item - Audio performance testInspection Distance - 1.8M ~2.8M

Motion video


Criteria - Check the sound from speaker - Plug Audio cable into Audio in port, check whether “Volume” is normal. - Adjust the volume to “0→ 9” by using the remote con troller. - Check the sound from speaker. - Check whether the “mute” is normal.

4. S-Video

Procedure - Test equipment: DVD player - Test signal: S-VideoInspection item - Video performance testInspection Distance - 1.8M ~2.8M Criteria - Check any abnormal color, line distortion or any noise

on the screen. - Check the sound from speaker.

5. 3D TestProcedure - Test equipment: DVD Player

- Test signal:HQFS format CD

Inspection item - 3D testInspection Distance - < 6MCriteria The image should not appear noise, flicker, shadow, shocking, abnormal color.


4-9 Calibration

1. Color Wheel Index Adjust

Check pattern - Test signal: 800*600@60Hz - Test pattern: 64 gray RGBWProcedure - Test equipment: video generator - Please press "Power", "Left", "Left" and "Menu" buttons sequentially to get into Service Mode. - Adjust "Color Wheel Index" to correct the test patten.Inspection item - Color saturationCriteria - There should not have any lack of RGBW. - Color levels should be sufficient and normal. note: Color Wheel Index should be adjusted when the test pattern appears flashing,abnormal color,missing color.1. PC Calibration

Procedure - Test equipment: video generator - Once Main Board is changed, PC calibration should be done as well. (1) Test signal: 800 x 600@60Hz (2) Test Pattern: White/Black - Note (1) Calibration pattern should be in full screen mode. (2) Please refer to 4-2 Guide to get into service mode, then get into “ADC/DEC color”, and choose “PC Calibration”.Inspection item - Check if there is lines on the screen. - 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. - The screen appears normal, it shouldn’t appear

SMPTE BAR

64 gray RGBW

Confidential 4-��BS275/BX275

any abnormal condition, such as lines and so on. - Check if the projection is same as monitor diplayed.

2. Video Calibration

Procedure - Test equipment: video generator. - Once main board is changed, Video calibration should be done as well. (1) Test signal: 480i (2) Test Pattern: SMPTE BAR - Note (1) Calibration pattern should be in full screen mode. (2) Please refer to 4-2 Guide to get into Service Mode select ‘‘ADC/DEC color’’, and choose “Video Calibration”.Inspection item - Color sturationsCriteria - There should not have any lack of SMPTE BAR.Color levels should be sufficient and normal. - There is not any abnormal lines on the image.


Full white pattern

4-10 Optical Performance Measure

Inspection Condition- Environment luminance: 2 Lux

- Product must be warmed up for 5 minutes

- Distances from the screen: 2.4 M

- Screen Size: 60 inches diagonal

1. Test equipment

Procedure - Please get into OSD menu, select “Lamp Setting” under “Options”, press “Enter” but ton, then select “Bright” mode. - Test equipment: video generator. - Test signal: analog 800 x 600@60Hz

2. Brightness

Procedure - Full white pattern - Use CL100 to measure brightness values of P1~P9. - Follow the brightness formula to calculate brightness values. ☼ Brightness Formula Avg. (P1~P9)*1.1m2Criteria • 1100 ANSI lumen

3. Full On/Full Off Contrast

Procedure - Full white pattern & Full black pattern - Use CL100 to measure brightness values of


Full black pattern

Full white pattern

X100%

full white pattern P5 & full black pattern B5 (see image: full white) - Follow Contrast formula to calculate contrast

values. ☼ Contrast Formula P5/B5 Note: P5 = Lux of center in full white pattern B5 = Lux of center in full black patternCriteria • 1800:1

4. Uniformity

Procedure - Full white pattern - Use CL100 to measure brightness values of P1~P9 (see image: full white). - Follow the Uniformity formula to calculate average values. ☼ Uniformity Formula JBMA Uniformity = Avg. (P1, P3, P7, P9) P5Criteria • 65%

4-11 Others

1. Functional Inspection

Power Key - Power key must operate smoothly.Remote Controller - Check whether the remote controller can work normal, “Menu”, “Left” and “Right” buttons work smoothly.

General - All OSD functions must be checked for func-tionality. When OSD menu is displayed, there shall be no visible peaking, ringing, streaking, or smearing artifacts on the screen.

Full white pattern


Factory Default - The factory settings (with appropriate centering, size, geometry distortion, etc.) shall be dis-played upon “Recall” is selected from OSD.

Display Size - All preset modes shall expand to full screen size using OSD Horizontal and Vertical Size controls.

Display Data Channel (DDC) - The purpose of the DDC test is to verify the DDC1/DDC2B operation of the projector and to verify Plug & Play function.

Acoustic - High pitch sound from cooling fan and color wheel is unacceptable.

2. Check points for exterior and print pattern Check item Check point

Text & Pattern Missing letters & pattern or blurry prints are unacceptable.

Exterior Dirt, scrape, water ripples and uneven color are unacceptable.

Focus ring/ Zoom ringFocus ring and Zoom ring should be movedsmoothly.

Logo Missing logo, missing prints and blurry prints are unacceptable

Screw All screws sure be fixed and in right type.Pedestal Well-functionedLamp Cover It should be locked in the correct place.Plastic Parts All plastic parts can not be broken and damaged.

Safety or warning label All safety and warning labels should be visible, including all contents.

Connector All interface connectors should be complete and workable.

Adjust foot Adjust foot should be adjusted smoothly.


Chapter 5

Firmware Upgrade

Section 1: System Firmware Upgrade

5-1-1 Equipment Needed

Software: (DDP2431-RS232)- DLP Composer Lite 9.2

- Firmware (*.img)

- 1510X library

Hardware: - Projector

- Power Cord (42.50115G001)

- RS232 Cable 9PIN to 3PIN (42.83618G001)

- PC or Laptop


5-1-2 DLP Composer Lite Setup Procedure

1. Choose "DLP Composer Lite V9.2 Setup" Program.

2. Click "Next".

3. Read "License Agreement".

- Choose "I accept and agree to be bound by all the terms and conditions of this License Agreement".

- Click "Next".

4. Click "Next".


5. Click "Next".

6. Click "Next".

7. The program is executing "installing" status.

8. Click "Finish".


5-1-3 Get into FW mode

1. Get into Firmware mode Hold on “POWER” button and plug in the power cord. - The LED will light red and amber. - Loosen “POWER” button. - Connect projector with RS232 cable to PC.

Note: - The system fan and the lamp will not operate.

2. Execute the "DLP ComposerTM Lite 9.2" file.

3. Click "Edit" and "Perferences".


4. Click "Library".

- Click the "Browse" and navigate to the directory where you put the DLP Composer files in.

- Click "1510X Library" folder.

- Click "OK".

5. Click “Communications”.

- Select “Serial Port”.

- Select the COM Port which you are using.

- Click “Configure”.

6. “Serial Port Configuration” picture will appear on the screen.

- Make sure the settings are as below:

(1) In “Baud Rate” item, select “115200”.

(2) In “Data Bits” item, select “8”.

(3) In “Stop Bits” item, select “1”.

(4) In “Parity” item, select “None”.

(5) In “RTS” item, select “Enable”.

(6) In “CTS” item, select “Disable”.

(7) Key in “4000” into “Read” and “Write” items of “Timeouts (in milliseconds)”.

- Click “OK”.

7. Click “OK”.


6. Choose "Flash Loader".

- Click "Browse" to search the firmware file (*.img).

- Click "Open".

7. Select "Skip Boot Loader Area". (select "32KB").

- Click "Reset Bus" to erase the flash memory.

8. If the FW is ready, click "Start Download" to execute the firmware upgrade.

- Click "Yes".

9. Proceeding Picture.


10. It takes about several minutes, the firmware upgrade process is finished, "Download completed" will appear on the screen.

- Unplug RS232 cable and power cord.

11. Check FW version.

- Re-plug in power cord, then restart the unit and get into the Service mode to check the firmware version.

(To get into service mode, please press "Power", "Left", "Left" and "Menu" buttons sequentially on remote controller.)


Section 2: 8051 FW Upgrade

5-2-1 Equipment Needed

Software: (N79A901R-USB)

- Setup _NLINK_en

- Manley USB Driver_NLINK (for N79A901R)

- XXX_8051_XXX.hex

Hardware:

- Projector

- Power cord: 42.50115G001

- USB Cable mini USB to USB (A) (42.00284G001)

- NLINK Fixture

- PC or Laptop


5-2-2 NLINK Setup Procedure

1. Choose "setup_NLINK_en.exe" program.

2. Click "Next".

3. Click "Next".

4. Click "Next".

Confidential 5-�0BS275/BX275

5. Click "Next".

- Select the additional task that you may create a desktop icon.

6. Click "Install" to begin installing NLINK Procedure.

7. Click "Finish".

- Complete the NLINK setup.

8. "MCU Choose" picture will appear on the screen.

- Close the picture.


5-2-3 Manley USB Driver Upgrade Procedure

1. Set-up

- Plug in the power cord, the power LED will light on red.

- Connect RGB-IN Port of projector with NLINK Fixture .

- Connect NLINK Fixture with PC by USB cable.

2. Execute Program

(1) "Found New Hardware Wiszard" picture will appear on the screen.

(2) Select "Install from a list or specific location (Advanced)".

(3) Click "Next".

(4) Select "Include this location in the search", then click "Browse".

(5) "Browse For Folder" picture will appear on the screen.

(6) Select "TPRP1" folder in the "Manley USB Driver_N-Link" folder, then click "OK".

(1)

(3)

(2)

(4)

(6)

(5)

Confidential 5-�2BS275/BX275

(7) Click "Next".

(8) Click "Continue Anyway".

(9) Click "Finish".

- "Manley TPRP1-Protocol Emulator" will appear on the picture.

- Complete the USB Driver Upgrade Procedure.

Note: - If "Found New Hardware Wiszard" picture appear again, repeat step 2 to install USB Drivier.

(7)

(8)

(9)


5-2-4 8051 Firmware Upgrade Procedure

1. Execute 8051 FW Program

- Double click "NLINK V1.2" to execute NLINK program.

Note: - When we execute NLINK program, the power LED and Fixture LED flash red.

2. Choose the right type of MCU

- "MCU Choose" picture will appear on the screen, select "N79A901R".

- Click "OK".

3. Choose 8051 file (*.hex)

- "Manley Nlink" picture will appear on the screen.

- Ensure "MCU" is the one you chose in the last step (as green square).

- Click "Open".

- Select the 8051 file where you put the file in, then click "Open".

4. Program settings

- Ensure NLlNK Fixture and PC are securely connected: the indicator lights on green, and the state is "Connect" (as blue square).

- Select "Internel RC(11.0592MHz)" (as green square).

- Click "Erase/Write(W)" to execute 8051 FW upgrade.


5. Finish

- When 8051 FW upgrade process is finished, "Write Chip success" will be shown.

6. Check 8051 FW version

- Turn on the unit and get into the service mode to check the 8051 FW version.

(To get into service mode, please press "Power", "Left", "Left" and "Menu" buttons sequentially on remote controller.)


Chapter 6

EDID Upgrade6-1 EDID Introduction

Extended Display Identification Data is a VESA standard data format that contains basic information about a display device and its capabilities, including vendor information, maximum image size, color characteristics, factory pre-set timings, frequency range limits, and character strings for the monitor name and serial number.

The information is stored in the display and is used to communicate with the system through a Display Data Channel (DDC), which sites between the display device and the PC graphics adapter. The system uses this information for configuration purposes, so the monitor and system can work together.

Note: - If a display device has digital input ports, like DVI or HDMI, but without EDID in its Main Board, the display device will show no image while the input source is digital signal.

- The EDID Upgrade procedure for BS275 is the same as BX275, we take BS275 for example here.


6-2 Equipment Needed

Software- EDID Program

- EDID File (*.ini)

Hardware - Projector

- Power Cord for Projector (42.50115G001)

- VGA Cable (42.87305G102)

- Generic Fixture (80.00001.001) for EDID Key-in (Fixture: JP3 must be closed)

- RS-232 9 Pin Cable (pin to pin, F-M) (42.83C07G001)

- Power Adapter (42.50115G001)

- Monitor

- PC


6-3 Setup Procedure (VGA)

1. Connect all ports (1) Connect P1 of fixture with COM Port of PC/Laptop by RS232 Cable.

(2) Connect P3 of fixture with RGB-IN Port of projector by VGA Cable.

(3) Plug Power Adapter to JP1 of fixture.

(5) Power on fixture.

(6) Plug Power Cord to projector.

Note: -You must confirm that the JP3 is closed in all procedure.

6-4 EDID Key-In Procedure 1. Execute EDID Program - Double click "EDID" to execute EDID program.

JP3

AdapterRS232 Cable

VGA Cable

JP1P1

P3


2. Process

(1) Select the COM Port which you are using.

(2) Click "Model".

(3) Select the EDID file (*.ini).

(4) Click "Open".

(5) Key in the Serial Number into the Barcode blank space.

(6) In "Write Source Select" item, select "VGA".

(7) Click "Program".

3. Change the cable to VGA

- When the message "Please change the cable to VGA" appears on the screen, click "OK".

(1)

(2) (3)

(4)

(5)

(6)

(7)


4. When the EDID program is completed, a message "OK" will appear on the screen.

5. Read EDID "VGA" information

- In "Read item", select "Analog" and "Trans", then click the "Read".

6. EDID information will show the result.

Confidential

Appendix A (Exploded Image) Note: This chapter is only designed to show the exploded image of the projector. For updated part numbers, please refer to RSPL report.

22

21

20

19

18

17

16

15

14

13

12

11

10

7

6

5

4

2

3

8

9

1

24 23

29

28

30

27

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26

5

31

32

33

BS275/BX275 Confidential �

Item P/N LG P/N Description BX275 BS275

� 5�.8HC0�G00� COV�0�5290� TOP COVER MN�600H BLACK BS275 v

5�.8HC0�G0�� COV�0�5�00� TOP COVER MN�600H BLACK BX275 v

2 80.8CP05G00� COV�0�8690� PCBA IR SENSOR BD FOR X��6� v v

� 5�.8CS0�G0�2 COV�0�5280� FRONT COVER FOR IR PC MN�600H BLACK ES526 v v

449.8CP02G00� COV�0�5250� SUNON 70*70*20mm AXIAL FAN, SHRINK TUBE, WIRE

LENGTH �55mm

v v

5 80.8LP04G00� COV�0�87002 PCBA PHOTO SENSOR BOARD FOR ES526X PROJECOR v v

6 70.8HC09GR0� COV�0�5�50� ASSY COLOR WHEEL MODULE BS275, BX275(SERVICE) v v

7 70.8HC�0GR0� COV�0�8820� ASSY ROD MODULE BS275, BX275(SERVICE) v v

8 49.8CS0�G002 COV�0�5260� SUNON 45*20mm GB�245PKV�-8AY, F TYPE BLOWER v v

9 70.8CQ�4GR0� COV�0�8640� ASSY LAMP DRIVER MODULE X�26� �D (SERVICE) v v

�0 49.8CQ0�G00� COV�0�86�0� SPEAKER 2W �6OHM DAB�28 90mm X�26� v v

�� SP.8HF0�GC0� COV�0�89�0� LAMP MODULE FOR PROJECTOR Z�5-XGA/Z�5-SVGA v v

�2 70.8HC�2GR0� COV�0�8900� ASSY LAMP COVER MODULE BS275, BX275(SERVICE) v v

�� 52.8EH05G00� COV�0�5��0� RUBBER ADJUST FOOT ES526 v v

�4 5�.8CS02G00� COV�0�5270� BOTTOM COVER PC MN�600H BLACK PDG-DSU�0 v v

�5 75.8AA04G00� COV�0�8660� BUY ASSY INTERLOCK SWITCH �409X v v

�6 75.8CP0�GP0� COV�0�8670� LVPS �80W X��6� STB<�W CT-258C v v

�7 70.8HC��GR0� COV�0�8860� ASSY IO COVER MODULE BS275, BX275(SERVICE) v v

�8 70.8HC��GR0� COV�0�5��02 WHOLE ASSY ENGINE MODULE 800*600 8HC(SERVICE) v

70.8HF05GR0� COV�0�5��0� WHOLE ASSY ENGINE MODULE �024*768 8HF(SERVICE) v

�9 80.8CP02G00� COV�0�8680� PCBA DMD BOARD FOR X��6� v v

20 48.8CQ0�G00� COV�0�8740� 0.55" XGA 2xLVDS SERIES 450 DMD -8 TI 8060-60�cB v

48.8EH0�G00� COV�0�8750� 0.55" SVGA 2xLVDS SERIES 450 DMD -8 TI 8060-60�cB v

2� 80.8HC0�G00� COV�0�87301 PCBA MAIN BD FOR LGE BS275 NEW PHOTO SENSOR v

80.8HF0�G00� COV�0�87102 PCBA MAIN BD FOR LGE BX275 NEW PHOTO SENSOR v

22 42.00�04G00� COV�0�86�0� FFC KEYPAD TO FORMATTER BD �6P P=0.5 �22mm HD80 v v

2� 80.8HC0�G00� COV�0�8720� PCBA KEYPAD BD FOR LGE Z�5-SVGA PROJECTOR v v

24 52.8HC0�G00� COV�0�5�20� KEYPAD RUBBER FOR BS275, BX275 v v

2542.50��5G00� COV�0�8620� CABLE POWER CORD �.8M SP�0+IS�4 US v v

42.00��0G0�� COV�0�8580� CABLE POWER CORD �.8M SP-62/IS-�4 UK DIS-WARNING

LABEL

v v

42.00�20G0�� COV�0�8590� CABLE POWER CORD �.8M SP-02�/IS-�4 EUROPE DIS-

WARNING LABEL

v v

42.00�9�G00� COV�0�8600� CABLE POWER CORD �.8M SP-022/IS-�4 KOREA v v

26 55.8HC0�G00� COV�0�9240� CARTON AB FLUTE �8KG �95*�6�*��2MM BS275 v v

27 75.8FL0�G00� COV�0�8920� 8FL LENS CAP MODULE v v

28 �6.8HF0�G00� SAC�066602� USER'S GUIDE MULTILINGUAL (CD) BS275/BX275 v v

29 �6.8HF02G00� MBM�6259605 WARRANTY CARD EU 9L FOR LG v v

�6.8HF0�G00� �840TWL005J WARRANTY CARD INDONESIA FOR LG v v

�6.8HF04G00� �840TWL005B WARRANTY CARD KOREA FOR LG v v

�6.8HF06G00� MBM�6259609 WARRANTY CARD TURKEY FOR LG v v

�0 45.8HC0�G00� COV�0�92�0� REMOTE CONTROLLER FOR LGE BS275&BX275 v v

�� 85.�A�26G080 COV��45��0� SCREW PAN MECH M2.6*8 Ni v v

�2 5�.8HH�7G00� COV��45�20� PHOTO SENSOR BD SPACER UF65 v v


Appendix B I. Serial Number System Definition

Serial Number Format for Projecto

Y MM RR CC SSSSS 1 2 3 4 5

1: Y = YEAR(Last digit of Year) (ex:2010 = 0)

2: MM =Month(Jan = 01,Feb =02,...Dec=12)

3: RR =Site code for each production factory (For Coretronic:CT)

4: CC =Code is self-produced by coding program.

5: SSSSSS = Serial code (00001~09999)

EX:

This label "003CTCC00001” represents the serial number for LG. It is produced in China Coretronic on March, 2010. Its serial code is 00001.

BS275/BX275 Confidential 2

II. PCBA Code Definition

PCBA Code for Projector

A B XXXXXXXXXX C XXX EEEE

1 2 3 4 5 6

1 : ID

2 : Vendor Code

3 : P/N

4 : Revision

5 : Date Code

6 : S/N


Appendix CNew photo sensor board Reworking SOP

Note:1.This procedure only for reworking old photo sensor(80.8EG04G002) to improve auto shutdown, image flicker issue2. The new photo sensor(80.8LP04G001) board must match with new main board The PN of new main board of BS275 is 80.8HC01G003 The PN of new main board of BX275 is 80.8HF01G0033. For main board rework, refer to chapter 2 (2-1~2-9)for details

1. Parts RequiredCoretronic P/N LG P/N Description Quantity80.8LP04G001 COV30387002 PCBA PHOTO SENSOR BOARD �85.1A126G080 COV31453101 SCREW PAN MECH M2.6*8 NI �51.8HH17G001 COV31453201 PHOTO SENSOR BD SPACER �

2. Disassemble Photo Sensor Board

1).Unscrew 1 screw (as blue circle) to disassemble the photo sensor board from the Color Wheel Module.

BS275/BX275 Confidential 2

3. Assemble New Photo Sensor Board1). Add “spacer with tape” to new photo sensor board (as below picture shows).2). Assemble new photo sensor board on color wheel module.Note: When fix photo sensor screw, photo sensor board must be placed on color wheel bracket horizontally.

bs275-bx275 servicmanual v5.0

Documents

lamp module

fan module

lamp cover module

main board module

blower module

lvps module

engine module

keypad board module