BenQ MP620C - XGA DLP Projector Manuel de service

DLP PROJECTOR PB8250 SERVICE MANUAL CONTENT Chapter 1: Engineering Specifications...

center of the screen that is entirely the measured color under default brightness and contrast settings. A14. COLOR UNIFORMITY Color Uniformity is

Step 2: Check specified screen sizes and zoom positions Step 3: Use Chart1 to measure Lateral Color for whole screen with Pattern 5 and record the

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Chapter 2: Spare Parts List PB8250 Spare Parts List Item No. Sales Location Notes 99.J8177.B81 PB8250 99.J8177.B8K Korea PB8250 99.J8177.B8T Ta

29 56.26J95.001 REMOTE PB8250 FORWARD 30 60.J8115.001 ASSY POWER+BRIDGE BD PB8250 31 60.J9418.001 ASSY SUB U/C PB8240 32 60.J9420.0

Chapter 3: Product description and operation Shipping Contents The projector is shipped with the cables required for connection to a PC and to video e

Optional Accessories 1. Macintosh adapter 2. 250W / 300W lamp module 3. Ceiling mount kit 4. Wireless Pro 5. Presentation Pro 6. DVI-I cable Pro

Chapter 1: Engineering Specifications 1

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Controls and Functions 20

Remote Control Description 21

Remote Control Effective Range Infra Red (IR) remote control sensors are located on the front and the back of the projector. The remote control must b

Installing or Replacing the Batteries 23

Installation Choosing a Location Your projector is designed to be installed in the four installation configurations shown here: Floor front, Ceiling f

Connecting to a Laptop or Desktop Computer Connecting Equipment to the Component Video Input The projector is capable of displaying various High Def

The following standards are supported in the HDTV function: Connecting to Video or S-Video Devices Connecting to Display Devices If you want to moni

Adjusting the Height The projector is equipped with 2 quick-release adjuster feet. Screen Size Place the projector at the required distance from the

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Operation Start Up 1. Switch all of the connected equipment on. 2. Plug the power cord into the projector and into a wall socket. 3. Turn on the w

6. The start up procedure takes about 30 seconds after pressing Power. In the later stage of start up, a default BenQ logo appears. 7. Next, the pro

Source Selection Auto Adjustment 32

Blank Zoom / Focusing Adjust the projected image to your desired size using the lens’ zoom ring. Then focus the image by rotating the focus ring.

Laser Pointer Operation The Laser Pointer is a presentation aid for professionals. It emits red colored light when you press it and the LED indicator

PIP (Picture In Picture) Operation By pressing the PIP-Source, PIP-Pos and PIP-Size hot keys, you can enable the PIP (Picture In Picture) function and

Menu Operation Menu System Please note that the OSD menus vary according to the signal type selected. 36

Using the menus The projector is equipped with on-screen display (OSD) menus for making various adjustments and settings. There are 10 different menu

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Packing Description 47

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Appearance Description 52

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Lamp Replacement Use and Replacement of the Lamp When the Lamp Indicator lights up red or a message appears suggesting it is time to replace the lamp,

To reduce the risk of injuries to fingers and/or compromising image quality by touching the lens, do not touch the empty lamp compartment when the lam

Temp Warning Light When the Temperature warning light is on, it is warning you of the following possible problems: 1. The internal temperature is to

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Shutdown 60

Chapter 4: Circuit Operation Theory PB8250 DMD projector being using the XGA DMD Engine made by BENQ, it included front end circuitry that digitizes a

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2. DMD driver board that transfer PW166 scaler output RGB888 signal to DMD chip acceptable signal for driving DMD mirror operation. The relate diagra

Power Board and BallastOptical EngineDMD CHIP Board Lamp OnControl SignalRGB 8882.5V, 5V, 12VIR Rear B oardKeypadColor Wheel Sensor BoardSensor Signal

The Image Processor also known as “Scaler” , which indicate its main function , expand or downsize the digital picture from ADC to a fixed size digita

ADHSYNC – Providing the Horizontal Synchronization signal to AD9882. ADVSYNC - Providing the Vertical Synchronization signal AD9882. DDC interface – P

DEN – Data enable signal output to DMD BD , provided as a valid data indicator signal for DMD driver. VCLK – V-port pixel clock. VPEN – V-port data en

software system will detect the abnormal signal. Sensor BD: The Sensor BD provides the color wheel index signal to DMD BD. The CWINDEX shall indic

Appendix A Optical Measurement Procedure 1. Scope: This document describes critical optical related test definitions and Instructions for data or

Chapter 5: Alignment Procedure 1. DMD Bias Voltage Alignment Equipment: None Procedure: (1) Watch DMD “Bias Voltage Bin” Label (Example: 8060-7bbc DDD

- Probe 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 c

4. S-Video and HDTV Color Adjustment Procedure Equipment: - Pattern generator (VG-828) - Lux meter ( CL-100) or CA 120 Procedure: (a) S-video adj

If we line the x and y, then the Pb offset is the shift action and the Pr offset is the rotational action. (3) Connect power, YPbPr Video into project

Chapter 6: Trouble Shooting Common Problems & Solutions 73

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Note: L10, L11, L12, L13 are located at 10% of the distance from corner itself to L5 A2. ANSI UNIFORMITY ANSI +Uniformity= Maximum (L1~13)-Averag

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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