BenQ PB8220 - XGA DLP Projector Service Manual Download Page 58 | Manualshive

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Chapter 4 Circuit Operation Theory

1.0 Introduction

The DX760 projector uses the XGA DMD Engine made by BENQ, it includes the front-end

circuitry and the video signals decoder that digitizes the input analog RGB and home video
signals. Also with two stereo audio inputs, one 8-ohm 2-Watts mono audio output, one Analog
D-sub output and an USB remote mouse device for general usage. As shown, in figure below
describes the how system consists of:

DDP1000 Board

Sensor

Board

FPC Board

PW166

Function

Block

Mouse /

RS232

Function

Block

Fan Ctrl

Function

Block

All Connector

AD

Converter

Video

Decoder

120 Pi

n

120 Pi

n

30 Pin

14 Pin

4 Pin

3 Pin

Color Wheel

DC/DC BD

14 Pi

n

PFC BD

AC Inlet

Ballast

14 Pin

KEYPAD

LED

10 Pin

6 Pin

5 pin

FAN1

FAN2

FAN3

2 Pi

n

IR

Audio

Amp.

4 Pi

n

`

80 Pi

n

80 Pi

n

Sensor1

14 Pin

30 Pin

Blower

4 Pin

Sensor2

Thermal

Breaker

Sensor3

Goden
Finger

3-1 Pin

3-1 Pi

n

3-1 Pin

2 Pin

2 Pin

380V/

GND

380V/

GND

18VPFC

Door
Lock

80 Pi

n

80 Pi

n

3 Pin

IR

Bias

Adjust

Jumper

DC Power

Lamp

Control

System Control

KeyPad & LED

Motor Control

Color Wheel

sensor

feedback

DMD Control/
Video signals

DMD Display

Signals

Audio

Processor

DC

power

Switch

51

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Summary of Contents for PB8220 - XGA DLP Projector

Page 1: ... Specification 20 Chapter 2 Spare Parts List 21 Chapter 3 Product description and operation 23 1 Shipping Content 23 2 Product Description 24 3 Remote Control Description 26 4 Installation 28 5 Operation 31 6 Packing Description 37 7 Appearance Description 39 8 Lamp Replacement 42 9 Shutdown 45 10 RS232 Codes 46 Chapter 4 Circuit Operation Theory 49 Chapter 5 Alignment Procedure 61 Chapter 6 Troub...

Page 2: ... 80 diagonal area 1 5 Color X y 1 5 1 White 305 040 325 040 1 5 4 Red 650 040 335 040 1 5 5 Green 345 040 515 040 1 5 6 Blue 137 040 070 040 1 6 Color Uniformity X y 1 6 1 White 04 04 1 6 2 Red 04 04 1 6 3 Green 04 04 1 6 4 Blue 04 04 2 0 Image Quality 2 1 Throw Ratio 60 5 Diagonal at 2m 2 2 Zoom Ratio 1 2 1 2 3 Distortion 2 3 1 Keystone Distortion 1 0 2 3 2 Vertical TV Distortion 1 0 2 4 Projecti...

Page 3: ...uched for short periods only 60 C 85 C Bottom Surface 55 C 70 C Metal Plastic 5 2 External surface or equipment which may be touched 70 C 95 C 5 3 Exhaust Air 80 C 6 0 Environmental Operating 10 40 C without condensation 6 1 Temperature Storage 10 60 C without condensation Operating 10 90 RH without condensation 6 2 Humidity Storage 10 90 RH without condensation Typical Normal Mode 34dBA at 25 C E...

Page 4: ...lt DDR DMD 10 2 Pixels H 1024 X V 768 10 3 Color Depth 24 Bits 16770000 colors 11 0 Compatibility PC Compatible 640X400 Æ 1024X768 compressed 1280X1024 Composite Sync Sync on Green Interlace Mode 8514A Detailed Support Timing Specification refer to Appendix E 1 H Sync 24 88 KHz V Sync 48 100 Hz 11 1 PC PC Frequency Limitation Pixel Clock 140 MHz 11 2 Video NTSC NTSC4 43 PAL Including PAL M PAL N S...

Page 5: ... 13 0 Control Interface 13 1 IR Receiver IR Receiver x2 Front Rear 13 2 Serial Connector 8 pin Mini Din Female x 1 RS 232 Standard 13 3 USB Connector B type USB terminal for mouse port 14 0 User Interface Adhere to Appendix E 3 14 1 Operator Keypad Refer to C001 14 2 Indicators Refer to C001 14 3 Remote Control Refer to C001 14 4 On Screen Display Refer to C001 14 5 Electric Keystone 7 except 1080...

Page 6: ...screens that do not provide any advantage to the performance of the unit 4 All measurements shall be made at standard color temperature setting 100 white image per ANSI IT7 228 1997 except where noted 3 Practical Requirements 1 When measuring contrast manually operators should not wear white clothing since light reflected from white clothing can influence the measurement 2 Unless otherwise specifi...

Page 7: ...he center of a solid white screen the lux value at the center of a solid black screen A6 JBMA CONTRAST JBMA Contrast Average L1 L2 L3 L4 L5 L6 L7 L8 L9 under solid white Average L1 L2 L3 L4 L5 L6 L7 L8 L9 under solid black A7 LIGHT LEAKAGE Leakage The maximum light leakage under a solid black pattern in or outside of the projected image A8 IMAGE DISTORTION Keystone W2 W1 W1 W2 x 100 Vertical TV di...

Page 8: ... measured at the center of the screen that is entirely the measured color under default brightness and contrast settings A13 ANSI COLOR ANSI Color is expressed as u v in 1976 CIE chromaticity values Note Color is measured at the center of the screen that is entirely the measured color under default brightness and contrast settings A14 COLOR UNIFORMITY Color Uniformity is the maximum color differen...

Page 9: ...e 2 Test Summary Dynamic Testing Specification Package Drop 76cm 1 drop per orientation all 6 primary surfaces plus a minimum of two selected corners and three selected edges total of 11 drops Package Vibration Random 0 01g2 Hz 5 100Hz all primary axis 20 min per orientation total of 60min Sine 0 5g 5 200Hz 1 octave min 15 min dwell on each resonant frequency all primary axis one sweep 30min minim...

Page 10: ...ting EFT Package Vibration Temperature Humidity Non operating ESD Shock Altitude Operating EMI Radiated EMI Conducted EMI Susceptibility 4 Noise Testing Standard 1 Desk high is 75 cm 2 Projector have to closed to the edge of desk 3 Noise meter high is 150 cm title 30 degree 4 The distance between noise meter and projector is 100 cm 5 Measured four surfaces and calculated the noise value by log ave...

Page 11: ...ters loaded into memory The unstable pixel appears to be flickering asynchronously with the image 2 5 Adjacent pixel Two or more stuck pixels sharing a common border or common point also referred to as a cluster 2 6 Streaks Artifact resulting from locallized variation in mirror tilt angle relative to surrounding mirrors They are similar in appearance to window scratches but appear at the mirror le...

Page 12: ...ush values must be adjusted to match the degamma table being used in order to generate an equivalent blue level on the test screen image 2 11 Two Zone Gray 10 Screen The Two Zone Gray 10 screen is used to test for major light blemishes Refer to Figure 1 for configuration All areas of the screen are colored a Microsoft Paintbrush gray 10 green red and blue set at 10 NOTE If linear degamma is not us...

Page 13: ...el SOM 4 4 dark pixels 5 6 minor blemishes 6 No DMD window aperture shadowing on the Active Area 7 No unstable pixels in Active Area Notes 1 Projected blemish numbers include the count for the shadow of the artifact in addition to the artifact itself so that the count usually represents a single artifact on the window 2 3 4 5 6 No blemish shall be more than 5 inches long or have a total area of mo...

Page 14: ...Figure 1 Major Blemish Two Zone Screen Critical Zone center 25 Non Critical Zone 13 ...

Page 15: ... Polarity H V H Frequency KHz 31 469 37 861 37 5 31 47 35 16 37 879 V Frequency Hz 59 94 72 809 75 00 70 08 56 25 60 317 Pixel Clock MHz 25 175 31 5 31 5 28 32 36 40 Standard 800x600 at 72Hz 800x600 at 75Hz 1024x768 at 60Hz 1024x768 at 70Hz 1024x768 at 75Hz Standard Type VESA VESA VESA VESA VESA Resolution H V 800x600 800x600 1024x768 1024x768 1024x768 Polarity H V H Frequency KHz 48 077 46 875 48...

Page 16: ...urn 9 5 Volt Supply 10 Sync Return 11 Monitor ID bit 0 12 Bi directional data SDA 13 Horizontal Sync 14 Vertical Sync 15 Data clock SCL Video Component Input Component input 4 5 6 Pin Definition Pin Definition Pin Definition 1 Composite video input 2 Audio input left channel 3 Audio input right channel 4 Luminance video input 5 B Y Chroma input 6 R Y Chroma input 3 5 mm phone plug is used for ster...

Page 17: ...ription LED Flashes when any button is pressed Power Use this button to turn your Data Projector on and off standby mode Laser Use this button to turn on off Laser Pointer on Remote Control Source To select input sources as Computer Video S Video Menu 6 1 OSD pop up 2 Move next item 4 1 Move next page 2 OSD increment move next sub item 3 1 Move previous page 2 OSD decrement move previous sub item ...

Page 18: ...select the PIP source to Video PIP S Video The button will activate the PIP function and select the PIP source to S Video External Status indicator LED Name Detailed Description Power LED Display the power on off sequence status Lamp Status LED Display the Lamp status Lamp fail Lamp spoil etc Temperature Status LED Display the Thermal status Fan Fail Over Temperature etc E3 Functionality The Follo...

Page 19: ... YES NO NO PIP Size YES NO NO PIP Position YES NO NO PIP H Pos YES NO NO PIP V Pos YES NO NO OSD H Pos YES YES NO OSD V Pos YES YES NO OSD Timer YES YES YES Source Scan YES YES YES Keystone Hold YES YES YES Mirror Hold YES YES YES Blank Time YES YES YES Brightnes s NO YES NO Contrast NO YES NO Color NO YES NO Tint NO YES NO Sharpness NO YES NO PIP Option System NO YES NO Information YES YES YES Re...

Page 20: ...l The system is auto adjusting Out of range The signal is over the specification Change the lamp and reset the lamp timer Lamp Hour is over 1900 hours You have to Change the Lamp Lamp Hour is over 1980 hours You have to Change the Lamp Lamp Hour is over 2000 hours Change the lamp Lamp Hour is over 2000 hours the user will see this message the system will shutdown in 10 minutes automatically 19 ...

Page 21: ... Ripple Noise 1 5 V 5 0 1A 1 2 A 150 mV 2 3 3 V 5 0 5 A 1 2 A 120 mV 3 12 V 10 0 1 A 1 2 A 300 mV F 3 Lamp Power specifications Specification Description Applicable Lamp 250W AC operation Starting pulse from Ignitor Pulse voltage 6 10kV max F 4 Others Item Description Power good signal Active high after 5 Volt reach 95 of its rating and goes to logic low at least 0 5ms before power falls to 90 of ...

Page 22: ...P 1571 28 125MM 15 55 J3505 001 PCB 1L SENSOR B BD SL700 X MI 16 65 J4001 001 COLOR WHEEL DIA44 DEG90 UNAXI 17 60 J3506 001 ASSY L C DX760 18 60 J3513 001 ASSY AV KIT DX760 19 55 J3422 001 PCBA EXTENSION BD DX660 20 50 J3404 001 WIRE 15 15P 1571 OD0 6 200MM 21 50 J3405 001 WIRE 30 30P 1571 OD0 6 280MM 22 55 J3501 011 PCBA MAIN BD DX760 23 55 J3502 001 PCBA DMD BD DX760 24 23 10084 001 FAN 12V70 70...

Page 23: ...2 27 01818 000 CORD SVT 18 3C 10A125V 1830US 43 27 82718 281 CORD H05VV F 10A250V EUR BLK 44 50 73213 501 CABLE 4P USB A B 1800MM BLACK 45 50 J0508 502 SIGNAL C 15 15P 2500MM BLK 46 50 J7111 501 CABLE A V G B R 1800 BLK 784 47 50 72918 001 CABLE A V RCA R W Y 1500MM 48 50 72920 011 C A MIN DIN 4P S VIDEO W S 15 49 50 74405 501 CABLE AUD PC99PT284C PT577C B 50 98 J3401 011 REMOTE W LASER DXS660 NEW...

Page 24: ...rify that you have all the items shown below If any of these items are missing please contact personnel at the place of purchase Projector Warranty and Support Quick Setup Guide Remote Control Audio Cable Audio Video Cable User s Guide CD VGA Cable Power Cord Chapter 3 Production Description and Operation 1 Shipping Content ...

Page 25: ...mouse connector IR remote sensor S Video jack Ventilation grill RS 232 control port Speaker Rear adjuster feet Focus and zoom adjusters Kensington lock slot VGA signal input PC AC power cord inlet VGA signal output Main power switch YPBPR connector Lamp door 1 11 2 12 3 13 4 14 5 15 6 16 7 17 8 18 9 19 10 20 2 Product Description ...

Page 26: ...ge settings and v select individual parameters for making changes Lamp Indicator The Lamp Indicator will light up when the lamp needs service cooling or replacement See Lamp Information on page 25 for more detailed information Temp indicator The Temp indicator will light up when the system temperature is too high which may occur if the projector is operated improperly See Temperature Warning Indic...

Page 27: ... following features Small and light for portability Compact remote control High quality manual zoom lens One key auto adjustment to display the best picture quality Digital keystone correction to correct distorted images Adjustable color balance control for data video display Ultra high brightness projection lamp Ability to display 16 7 million colors On screen menus in 11 languages Switchable Pre...

Page 28: ...line that is a right angle to the remote sensors The distance between the remote control and the remote sensors must be shorter than 6 meters 19 5 feet Removing the Battery Protector The remote control will not operate until you remove the battery protector Pull the plastic tab until it comes out of the remote control Power Hide Show image Source Resync Auto sync Menu Keystone Keystone 3 Remote Co...

Page 29: ...of an explosion if batteries are incorrectly replaced Replace only with the same or equivalent type recommended by the manufacturer Dispose of used batteries accord ing to the manufacturer s instructions Pull out the battery holder 1 Insert the new battery in the holder 2 Push the holder into the remote control 3 ...

Page 30: ...24 5 1 52 152 4 10 120 6 22 74 7 7 62 91 4 2 5 250 1 56 155 6 1 91 190 5 12 144 7 47 89 6 9 14 109 7 3 300 1 87 186 7 2 29 228 6 14 168 8 71 104 5 10 67 128 0 3 5 350 2 18 217 8 2 67 266 7 16 192 9 96 119 5 12 19 146 3 4 400 2 49 248 9 3 05 304 8 18 216 11 20 134 4 13 72 164 6 4 5 450 2 80 280 0 3 43 342 9 20 240 12 45 149 4 15 24 182 9 5 500 3 11 311 2 3 81 381 0 22 264 13 69 164 3 16 76 201 2 5 ...

Page 31: ...surement Minimum zoom Maximum zoom Minimum zoom Maximum zoom feet inches feet inches feet inches meters cm meters cm meters cm 4 48 1 96 23 5 2 40 28 7 1 100 0 49 48 9 0 60 59 9 6 72 2 93 35 2 3 59 43 1 1 5 150 0 73 73 4 0 90 89 8 8 96 3 91 47 0 4 79 57 5 2 200 0 98 97 8 1 20 119 8 10 120 4 89 58 7 5 99 71 9 2 5 250 1 22 122 3 1 50 149 7 12 144 5 87 70 4 7 19 86 2 3 300 1 47 146 7 1 80 179 7 14 16...

Page 32: ...ds to connect your projector to your desktop or notebook computer VCR or other systems However a Mac adapter is needed for connection to Macintosh computers 1 Computer The USB cable is not needed unless you have a remote control with mouse functions 2 DVD player or HDTV 3 S video device ...

Page 33: ...Installation 15 User s Guide 4 Video device or VCR 5 Output monitor ...

Page 34: ...er switch 3 Press and hold POWER to start the unit The back lit POWER key flashes green and stays green when the power is turned on When the power is turned off there is a 120 second cooling period before the projector can be re started 4 Switch on all connected equipment Remote Control Projector 5 Operation ...

Page 35: ... sliding bar labeled Keystone as needed Press if the top of the image is too wide Press if the bottom of the image is too wide Auto Adjustment In some cases you may need to optimize the picture quality To do this press the AUTO key on the control panel of the projector or on the remote control Within 3 seconds the built in Intelligent Auto Adjustment function will re adjust settings to provide the...

Page 36: ...the projector or remote control press the Menu button 2 Press or to select the desired menu 3 Press v or to select the desired parameter 4 Press or to change the setting or open a sub menu 5 To change another parameter press v or to select the parameter 6 To go to another menu press the Menu button then press or to select the menu 7 To close the menu system press the Menu button one or more times ...

Page 37: ...elects picture source The operation of this function depends on the Source Scan setting Keystone Corrects slanted edges of the image Picture mode Adjusts picture for type of input Auto sync Synchronizes with input signal Aspect ratio Selects proportions of the image ...

Page 38: ...is function is available only when the input source is PC V position Shifts image up or down This function is available only when the input source is PC Saturation Adjusts intensity of colors This function is available only when the input source is Video Tint Shifts colors toward red or toward green This function is available only when the input source is Video Sharpness Sharpens or softens the im...

Page 39: ...Operation 21 User s Guide Audio Tab FUNCTION DESCRIPTION Mute Stops audio output Volume Changes loudness of audio Treble Changes loudness of higher frequencies Bass Changes loudness of lower frequencies ...

Page 40: ...s for input signal OSD position Selects position of on screen menu OSD timeout Sets how quickly on screen menu closes Advanced Auto off Sets shutdown delay for no input signal Lamp saver Sets lower light output for longer life Lamp reset For new lamp resets hours of use Reset menu Returns all settings to factory preset values 1 Default 3 Rear screen projection 2 Ceiling mounted projection 4 Ceilin...

Page 41: ... the picture in picture Size Selects the size of the pic ture in picture Use key to select small medium or large PIP size Position Selects a desired position for the PIP PIP Adjust Brightness Brightens or darkens the image Contrast Sets difference between light and dark areas Saturation Adjusts intensity of colors Tint Shifts colors toward red or toward green Sharpness Sharpens or softens the imag...

Page 42: ...s adjust default brightness value in source PC 0 64 2 Factory Contrast adjust default contrast value in source PC 0 64 3 YPbPr Press or to PbPr submenu 3 6500K Press or to 6500K 11500K submenu 3 PC 9300K Press or to 9300Ksubmenu 3 Video 9300K Press or to 9300Ksubmenu 3 11500K Press or to 6500K 11500K submenu 4 Test Pattern 1 system auto produce pattern for engineer test 4 Tets Pattern 2 system aut...

Page 43: ...500K G adjust 11500K R gain 11500K B adjust 11500K R gain 9300K sub menu PC 9300K R adjust PC 9300K R gain PC 9300K G adjust PC 9300K G gain PC 9300K B adjust PC 9300K B gain Video 9300K R adjust Video 9300K R gain Video 9300K G adjust Video 9300K G gain Video 9300K B adjust Video 9300K B gain PbPr submenu PbPr Offset R adjust PbPr Offset R PbPr Offset G adjust PbPr Offset G PbPr Offset B adjust P...

Page 44: ...CARDBOARD P N 44 J3501 011 ASSY CABLE CSN RIGHT P N 47 J3504 00X CSN LEFT P N 47 J3505 00X CTN 76102 00X PEARL BAG PE BAG 39 6 Packing Description ...

Page 45: ... UPC CODE 76 0 mm 76 0 mm 1 FOR CTN LBL PRINTING 1P Product L1596A vp6120 Digital Projector XGA 30P Option ABA S Serial No TWBYWWZZZZ Serial No TWBYWWZZZZ Made in Taiwan 8 0 0 8 7 3 6 6 0 6 4 0 Form No ACM0 0B 003 24 010918 40 ...

Page 46: ...Form No ACM0 0B 003 24 010918 SPEC LBL P N 40 L3303 10X MODEL LBL P N 40 J3502 00X 65 J1309 071 BCS Y8047C 60 J3409 001 65 J3406 001 42 J3415 001 7 Appearance Description ...

Page 47: ...ting 2 Model lbl printing H P S e r i a l N u m b e r S T W B Y W W Z Z Z Z 1 P L 1 5 9 6 A M a n u f a c t u r e d A p r i l 2 0 0 3 M a d e i n Ta i w a n BAR CODE 39 BAR CODE 39 Serial No TWBYWWZZZZ 17 mm 50 mm Rev A 65 7 mm 59 2 mm 0 3 0 5 3 2 1 1 Complies with Canada ICES 003 Class B ...

Page 48: ...ULATION LES AMPOULES HAUTE PRESSION RISQUENT D EXPLOSER QUAND ELLES SONT CHAUDES CONSULTER LE MODE D EMPLOI PARA REEMPLAZAR LA LAMPARA APAGUE EL PROYECTOR Y RETIRE EL CABLE DE ALIMENTACION DEL TOMACORRIENTE ANTES DE REEMPLAZAR LA LAMPARA ESPERE HASTA QUE LA LAMPARA SE ENFRIE AL MENOS UNOS 45 MINUTOS SI TOCA LA LAMPARA CUANDO ESTA CALIENTE PUEDE QUEMARLE LAS MANOS LA LAMPARE ES ALTA PRESION CUANDO ...

Page 49: ...42 ...

Page 50: ...43 ...

Page 51: ...8 Lamp Replacement 44 ...

Page 52: ...45 ...

Page 53: ...46 ...

Page 54: ...9 Shutdown 47 ...

Page 55: ...orce PC BE EF 02 06 00 AE C6 C7 00 00 00 00 00 Force Video BE EF 02 06 00 51 C6 C8 00 00 00 00 00 Force S Video BE EF 02 06 00 80 C7 C9 00 00 00 00 00 Force YPbPr BE EF 02 06 00 B3 C7 CA 00 00 00 00 00 Operation Packet Type command PC Picture Controls Command Packet Header 7 bytes Packet Payload 25 bytes Brightness BE EF 03 19 00 44 A0 03 C7 02 CC CC 00 00 00 00 CC 16 Brightness BE EF 03 19 00 2A ...

Page 56: ...00 FF C9 04 C0 02 CC CC FF FF FF FF CC 16 Color Temp 50 0 BE EF 03 19 00 69 49 01 ED 02 CC CC 00 00 00 00 CE FF FF FF CC CC CC CC CC CC CC CC CC CC CC CC 0 10 BE EF 03 19 00 1C 89 01 ED 02 CC CC 00 00 00 00 00 00 00 00 CC CC CC CC CC CC CC CC CC CC CC CC 50 20 BE EF 03 19 00 69 1C 01 ED 02 CC CC 00 00 00 00 32 00 00 00 CC CC CC CC CC CC CC CC CC CC CC CC PIP Controls PIP Size Off BE EF 03 19 00 15...

Page 57: ... 01 35 02 CC CC 01 00 00 00 00 00 00 00 CC CC CC CC CC CC CC CC CC CC CC CC 50 204 BE EF 03 19 00 FE 5E 01 35 02 CC CC 01 00 00 00 32 00 00 00 CC CC CC CC CC CC CC CC CC CC CC CC PIP Contrast 50 58 BE EF 03 19 00 01 EF 01 36 02 CC CC 01 00 00 00 CE FF FF FF CC CC CC CC CC CC CC CC CC CC CC CC 0 131 BE EF 03 19 00 74 2F 01 36 02 CC CC 01 00 00 00 00 00 00 00 CC CC CC CC CC CC CC CC CC CC CC CC 50 2...

Page 58: ...Board PW 166 Function Block M ouse R S232 Function Block FanCtrl Function Block AllConnector AD Converter Video Decoder 120 Pin 120 Pin 30Pin 14Pin 4Pin 3Pin C olorW heel D C D CBD 14 Pin PFCBD ACInlet Ballast 14Pin KEY PAD LED 10Pin 6Pin 5pin FAN1 FAN2 FAN3 2 Pin IR Audio Am p 4 Pin 80 Pin 80 Pin Sensor1 14Pin 30Pin Blow er 4Pin Sensor2 Therm al Breaker Sensor3 G oden Finger 3 1Pin 3 1 Pin 3 1Pin...

Page 59: ...he DMD module the Fan Control module 2 1 Power Supply Module 2 1 1 Block Diagram 2 1 2 General Specification Input voltage AC 90 264V Input Frequency 47 63Hz Input power 330W max The power circuit shall supply DC power outputs as followings Output Nominal MAX Load Current 1 375 V 0 56 A 2 12 V 1 2 A 3 3 3 V 1 1 A 4 5 V 1 A 52 ...

Page 60: ...mH or more 10mH 2 DM inductor To be used the low μ Iron poweder core and the inductance is lower 10uH or more 100uH 3 X capacitor To be placed between L and N and the capacitance is usually 0 1uF to 1uF 4 Y capacitor To be placed L G and N G and we often pair the CY1 and CY2 for EMI 2 1 3 2 Bridge rectifier and filter Bridge converts the AC input into DC output and the CAP is AC filter 53 ...

Page 61: ... boost converter consists of a boost inductor L a controlled power switch Q a catch diode D an output capacitor Co and a PFC controller PFC s goal id to shape the input current in a sinsoidal fashion in phase with the input sinusoidal voltage 2 1 3 4 SPS BLOCK DIAGRAM Snubber circuit The snubber circuit which is reduce the spike voltage This had its benefits in the Safe Operating Area SOA of the s...

Page 62: ...tifiers Circuit t reverse recovery time will be minimized the loss Choosing the best rectifiers for any switching power supply design is an important process The rectifiers are the largest source if loss within switching power supplies To choose the best rectifier one must understand the parameters that affect their efficiency The most important rectifier parameters are the forward voltage Vf and ...

Page 63: ...YNCZ ACTDATA GY 8 0 BU 7 0 and RV 7 0 signals on the rising edge VSYNCZ I None Vertical Sync pulse is the basic display field reference signal HSYNCZ I None Horizontal Sync pulse is the basic display line reference signal ACTDATA I None Active Data level indicates when active pixels are available OLACT I None Over Lay Active level indicates whether data on GY 8 0 BU 7 0 and RV 7 0 is overlay or no...

Page 64: ...od 2 2 2 Sensor BD The Sensor BD provides the color wheel index signal to DMD BD The CWINDEX shall indicate the beginning of the red light on the DMD device The XPE phase the display of the data on the DMD based on the CWINDEX signal The system can be configured to delay the CWINDEX for electronic alignment of the color wheel The timing of CWINDEX and the delayed CWINDEX is shown below 57 ...

Page 65: ...on Protect Decoder Circuit 8 Pin Control Port PC_RX PC_TX RX TX RS232 Driver Receiver Sp232E Audio Processor TDA7433 Stereo R Stereo L RCA Audio R RCA Audio L YC Signal Audio Signal Out To DMD Board To Fan Control Board KEY0 7 LED0 3 To Keypad Board IR to USB Mou se USB Mouse output D D IR1 IR2 The video signal supports both composite and S video input and output YUV422 format to the scaler proces...

Page 66: ... Converter AD9883 The ADC converter digitizes the input analog RGB data signal from D_SUB and output the digital data streams to Image Processor The normal voltage level of analog RGB input signals is about 0 7V while the ADC digital signal output to Image Processor is LVTTL level about 3 3V The ADC AD9883 could supports up to pixel rate at about 140MHZ which is about SXGA 75HZ analog input signal...

Page 67: ...erent input resolution ensure the same output image size Providing Bitmap OSD picture which if more fancy than normal OSD chip On chip Microprocessor The Image Processor is a highly integrated circuit it include MCU Scaler Memory OSD This will increase the stability of the system There is some control signals list below DCLK pixel clock output to DMD driver BD provided as a reference clock for DMD...

Page 68: ...e chip will respond to the IR signal and sending out to PC the according simulated mouse code hence control the mouse movement and function IR Receiver The PIC 26043LM is miniaturized receivers for infrared remove control systems PIN diode and pre amplifier are assembled on lead frame the epoxy package is designed as IR filter The demodulated output signal can directly be decoded by a microprocess...

Page 69: ... 30 volt and the maximum continuous Drain current of 5 8A at 25 Electronic System Protection for abnormal state The circuit of electronic system protection for abnormal state is used for the hardware light off and power off in abnormal state of thermal and safety issues If the protection function is active then the software system will detect the abnormal signal 62 ...

Page 70: ... DLP Brightness 32 CW Delay Adjustable DLP Contrast 32 White Peak 10 The default values let optical engine to get maximum contrast and brightness Procedure 1 Probe impedance matches 50 ohm 2 Open Factory OSD and select color wheel delay item 3 Leave the image pure red DMD red curtain 4 Put the detector on the screen that red image was projected 5 Watch the oscilloscope and notice the square wavefo...

Page 71: ...lity is not good 5 Test the connection between formatter board to keypad board and IR board 6 The formatter board would be note fail if there are some wires is broken in formatter board 4 DMD Panel Alignment Equipment Pattern Generator Procedure 1 Connect power Video signal into projector 2 Light on projector 3 Change pattern generator to full white pattern 4 Watch the image if any pixel lost 5 Ch...

Page 72: ...FPC together 2 Assy Fold Mirror Chk Fold Mirror Assemble Fold Mirror with 3 clippers Push Fold Mirror into Datum planes Chk Ill Sph Lens Assemble Ill Sph Lens Assemble Spacer Chk Ill_Asph Lens Assemble Ill_Asph Lens Assemble Screw Ring Screw Driver for Screw Ring Asp Assemble BKT Light Pipe on Light Pipe UV illuminated system and UV glue Assemble two Screws for Light Pipe Alignment Assemble Light ...

Page 73: ...into Lower case HSG DMD HSG CW Rotate CW Assemble CVR_DMD_HSG Screw Driver for CVR_DMD_HSG 5 Alignment and CW adjustment Chk CW rotation Align Light Pipe and Glue on it Light Pipe Alignment Fixture Instant glue Remove ENG_CVR Adjust Club 9 position until BB within spec Glue to fix the Club 9 Club 9 adjustment fixture and glue C W delay adjust and Engine Test Sensor and Oscilloscope 66 ...

Page 74: ...x y As per C201 item 1 4 4 G Pattern Chromaticity Coordinate x y As per C201 item 1 4 5 B Pattern Chromaticity Coordinate x y As per C201 item 1 4 6 Chromaticity Coordinate x y As per C201 item 1 4 1 100 W Pattern Uniformity As per C201 item 1 5 1 Chromaticity Coordinate x y As per C201 item 1 4 2 3 Color 50 W Pattern Uniformity As per C201 item 1 5 2 Dark Blemish 6 Blue 180 Pattern Dark pixel 4 B...

Page 75: ...Change Timing and pattern of pattern generator 3 Timing NTSC H 15 73 KHz V 29 96 Hz 4 Pattern gray 32 or gray16 only for over scan 5 Light on projector 6 Set user OSD values to default 7 Enter factory mode 8 Set Factory values to default 9 Adjust the Brightness and Contrast to let the black level to just distinguish and the light output of white level to just max 10 Check the 32 levels of gray All...

Page 76: ...lue Item Value Item Value Brightness 0 Brightness Bias Adjustable Contrast 0 Contrast Bias Adjustable Filter 1 Pb offset Adjustable Red Gain 128 Pr offset Adjustable Green Gain 128 Blue Gain 128 White Peak 2 Gamma Table Linear Procedure I Offset adjustment 1 Black coordinate spec Osram lamp Oshio lamp X0 0 281 0 01 0 313 0 01 Y0 0 311 0 01 0 329 0 01 2 The variance of color coordinate via Pb offse...

Page 77: ...tion 4 Connect power YPbPr Video into projector 5 Change Timing and pattern of pattern generator Timing 480P H 31 54 KHz V 60 08 Hz Pattern Black 6 Light on projector 7 Set user OSD values to default 8 Enter factory mode 9 Set Factory values to default 10 Follow the PbPr offset adjustment flow chart 70 ...

Page 78: ... y2 Increase Pb offset until the y value y2 1 2Dy Now the reading of the Lux meter x3 y3 and x3 will x0 y3 will y0 Increase Pr offset the x value will decrease and y value will increase to meet the spec Decrease Pr offset the x value will increase and y value will decrease to meet the spec Increase Pb offset until the x value x2 1 2Dx Now the reading of the Lux meter x3 y3 and x3 will x0 y3 will y...

Page 79: ... Pb x0 281 y0 311 x 271 y 311 dx 01 1 2dx 0 005 inc Pb x0 281 y0 311 x 276 y 316 dec Pr x 281 y 311 Case x1 x0 y1 y0 x0 281 y0 311 x 291 y 291 inc Pr x0 281 y0 311 x 281 y 301 dy 01 1 2dx 0 005 inc Pb x0 281 y0 311 x 286 y 306 inc Pr x 281 y 311 x0 281 y0 311 x 301 y 301 inc Pr x0 281 y0 311 x 291 y 311 dx 01 1 2dx 0 005 dec Pb x0 281 y0 311 x 286 y 306 inc Pr x 281 y 311 Case x1 x0 y1 y0 x0 281 y...

Page 80: ... of pattern generator Timing 480 H 31 54 KHz V 60 08 Hz Pattern 100 blue 2 Adjust saturation and use lux meter to measure to let the light output just max IV Gamma Curve 1 Change Timing and pattern of pattern generator Timing NTSC H 15 73 KHz V 29 96 Hz Pattern 100 blue 2 Adjust Gamma Index and Red Green Blue Gamma to fit mars YPbPr gamma curve 7 PC Color Alignment Procedure Equipment Pattern gene...

Page 81: ...he light output to just max 9 Check the 32 levels of gray All steps must appear II Color Temperature 1 Change Timing and pattern of pattern generator Timing 800x600 60Hz H 37 879Khz V 60 317Hz Pattern 80 gray 2 Color temperature spec Warm 0 Standard 1 Cool 2 Color temperature 6500 K 9000 K 11500 K x 0 313 0 01 0 281 0 01 0 272 0 01 y 0 329 0 01 0 311 0 01 0 283 0 01 3 The variance of color coordin...

Page 82: ...ition as per ANSI IT7 215 1992 3 Connect DSUB cable to Graphics port of UUT 4 Connect stereo input to stereo input of UUT 5 Connect RCA terminal to Video input of UUT 6 Connect S terminal to S Video input of UUT 7 Connect AC power cord to UUT A Video EE Check Equipment VG828 DVD Player Aspect Ratio 4 3 Channel Prime Mode Timing Pattern Item Criteria Gray 0 100 H V Res 1 Line Color Hue Sat need cor...

Page 83: ...ish NTSC H 15 73KHz 29 96Hz I Movie Video Essential Gray 0 100 H V Res 1 Line Color Hue Sat need correct Smear Not acceptable Linearity As optical spec S Video PAL H 15 63KHz 25Hz I PT2 Master Pattern Jitter Swing Snack Ring Cross talk Not Acceptable Gray 0 100 H V Res 1 Line Color Hue Sat need correct Smear Not acceptable Linearity As optical spec PT2 Master Pattern Jitter Swing Snack Ring Cross ...

Page 84: ...t Acceptable PT976 64Gray Color Gray Color Check 64 Step PT863 Text EM Character EM Clear 480p H 31 54KHz 60 08Hz p Movie Video Essential Gray 0 100 H V Res 2 Line Color Hue Sat need correct Smear Not acceptable Linearity As optical spec 720p H 45 00KHz 60Hz p PT2 Master Pattern Jitter Swing Snack Ring Cross talk Not Acceptable Gray 0 100 H V Res 4 Line Color Hue Sat need correct Smear Not accepta...

Page 85: ...0 02 Standard 2 0 281 0 311 0 02 PT46 10 Gray Warm 3 0 313 0 329 0 02 1024 768 85Hz 68 677KHz 84 997Hz Picture Phone Lady Picture check Gray 0 100 H V Res 1 Line Color Hue Sat need correct Smear Not acceptable Linearity As optical spec DSB 640 400 70Hz 31 47KHz 70 08Hz PT2 Master Pattern Jitter Swing Snack Ring Cross talk Not Acceptable Gray 0 100 H V Res 1 Line Color Hue Sat need correct Smear No...

Page 86: ...s optical spec 800 600 75Hz 46 875KHz 75Hz PT2 Master Pattern Jitter Swing Snack Ring Cross talk Not Acceptable Gray 0 100 H V Res 2 Line Color Hue Sat need correct Smear Not acceptable Linearity As optical spec 800 600 85Hz 53 67KHz 85 06Hz PT2 Master Pattern Jitter Swing Snack Ring Cross talk Not Acceptable Gray 0 100 H V Res 2 Line Color Hue Sat need correct Smear Not acceptable Linearity As op...

Page 87: ...rdinate x y 0 04 B Pattern Chromaticity Coordinate x y 0 04 Chromaticity Coordinate x y 0 04 100 W Pattern Uniformity 0 04 Chromaticity Coordinate x y 0 04 3 Color 50 W Pattern Uniformity 0 04 Dark Blemish 6 Blue 180 Pattern Dark pixel 4 Bright Blemish 6 4 DMD Gray 30 Pattern Bright pixel 0 Inspection Step Check Items Acceptance Criteria Equipment 1 Apperance CHK Appearance C315 2 Buttom CHK Funct...

Page 88: ...l Picture Quality PC Flicker Static pattern SMPTE133 Pattern Stuck Bit Tint Noise 7 Video RCA S Video Dynamic movie Toy Story Video Essential General Picture Quality DVD Player 8 Audio Input Output DVD Player 9 OSD Remot e As per C201 PC input 10 Hi Pot As per C201 High Power Generator 81 ...

Page 89: ...Chapter 6 Trouble Shooting 82 ...

Page 90: ...83 ...

Page 91: ...with this option No Signal No Yes 1 Check input cable 2 Check OSD source set up Auto Power Off No Yes 1 Check OSD lamp hours 2 Check OSD Auto Off setup value 3 Check lamp door 4 Check 12V fan 5 Check thermal status 6 Check AV Box connector if with this option Video NG Yes No 1 Check AV Box 2 Check Video cable Audio NG No Yes 1 Check AV Box 2 Check audio cable IR Remote Control NG No Yes 1 Check Re...

Page 92: ...olor wheel and Sensor board 2 Check DMD board 3 Check Main and Translation boards Image NG Screen dimmish Yes 1 Check DMD board 2 Check color wheel and Sensor board No Image NG Freezing Yes 1 Check color wheel 2 Check Sensor board color index signal No Image NG Missing column bar No Yes 1 Check DMD holder Image NG Screen overlap Yes 1 Check Main and Translation boards 2 Check DMD board 85 ...

Page 93: ...k TR b No No No Yes 1 change DMD 2 change DMD b 3 clean elastomer Yes Yes Yes light leakage No 1 chk DMD baffle 2 chk TIR Yes NG System Trouble shooting Guide Brightness 1 Reset Factory mode chk DC offset Gain setup 2 chk DMD b 3 clean projection lens 4 cleanTIR 5 clean optical parts Yes NG Uniformity Contrast Color Color Uniformity 1 Reset Factory mode chk DC offset Gain setup 2 chk DMD baffle 3 ...

Page 94: ...there was MCLK and DCLK output to IC901 Yes a Check the mouse of PC is still working normally b Check the mouse driver of PC is PS2 compatible mouse c Replace IC802 a Replace IC602 b IC901 a CN605 bad soldiering b IC901 bad soldiering c Avbox and MainBD bad connection a Check the voltage of IC502 IC503 3 3V IC501 3 3V BC537 3 3V b if voltage above are OK then check IC611 VSYNC and IC606 HSYNC if t...

Page 95: ...B 154VDC CHECK PFC B D WHETHER POOR SOLDER NO B1 B 0VDC F651 OPEN Q651 DAMAGE D S SHORT YES NO CHECK R612 R609 D610 IC601 R611 Q602 CHECK IC651 R656 D651 BD651 R658 R678 NO YES CHECK L651 L652 WHETHER POOR SOLDER Q601 DAMAGE D S SHORT YES NO CHECK POLARITY B PGND B1 B C659 YES YES NO CHECK R663 R662 R661 R659 R660 ZD651 88 ...

Page 96: ...ble Shooting Guide VCC 12V function OK Yes No 1 Q705 2 Q706 3 Q701 4 Q702 Abnormal function OK Yes No IC806 LAMPEN S function OK Yes No 1 Q802 2 IC805 LAMP_LIT function OK Yes No 1 Q707 2 Q708 IR0 function OK Yes No 1 IC802 2 IC803 B POWERONA function OK Yes No 1 Q803 2 Q703 Q704 89 ...

Page 97: ...B VPOSRAIL VNEGRAIL function OK LED_1 3 FAN_HSO function OK IC802 No Yes Yes No 1 Q15 2 Q9 3 D8 4 D10 5 U2 6 D12 7 D11 8 D9 END 90 ...

Page 98: ...6 DMD Board Trouble Shooting Guide 91 ...

Page 99: ...92 ...

Page 100: ...Chapter 7 Schematics and Assy Drawing 93 ...

Page 101: ...roject Code Reviewed By Approved By Prepared By Model Name PCB P N PCB Rev Benq Corporation OEM ODM Model Name 99 J3577 000 C3 304 001 FAN BOARD 1 3 JOHN LIN T S WU 48 J3513 S02 S02 ANGEL HU Size DX760 99 J3577 001 0 Monday December 23 2002 NA FAN_Control FAN_Control GND Page1 Page1 GND ...

Page 102: ... 1U K R17 1K C14 Spec 10U 1 2 C6 2 2U M R2 51 RF1 470 R4 5 1K CF1 4 7U Z R14 4 3K R8 10K U5 AD5301 VDD 1 A0 2 A1 3 Vout 4 GND 8 SDA 7 SCL 6 PD 5 J7 20L1033005 1 2 3 4 5 C20 Spec 470U 1 2 C1 0 1U 50V Z C116 Spec 1000U 1 2 QF1 MMBT2222A 1 3 2 R21 100 CF2 0 1U M R25 4 7K R19 47 J8 1 3 5 7 9 11 13 2 4 6 8 10 12 14 J2 1 2 3 4 J1 1 2 3 4 5 6 Q6 SI4431DY T1 2 4 7 3 1 6 5 8 C11 Spec 10U 1 2 RA1 20K C15 Sp...

Page 103: ...odel Name 99 J3577 000 C3 304 001 FAN BOARD 3 3 JOHN LIN T S WU 48 J3513 S02 S02 ANGEL HU Size DX760 99 J3577 001 0 Monday December 23 2002 NA Screw Holes Optical Points OP OP10 OP OP9 OP OP5 OP OP1 H4 HOLE V8 1 2 3 4 5 6 7 8 9 H6 HOLE V8 1 2 3 4 5 6 7 8 9 OP OP8 OP OP14 OP OP11 OP OP4 OP OP2 H5 HOLE V8 1 2 3 4 5 6 7 8 9 OP OP6 H3 HOLE V8 1 2 3 4 5 6 7 8 9 OP OP13 OP OP7 OP OP12 OP OP3 ...

Page 104: ......

Page 105: ...Form No ACM0 0B 003 24 010918 ...

Page 106: ...Form No ACM0 0B 003 24 010918 ...

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