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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
Summary of Contents for PB8220 - XGA DLP Projector
Page 14: ...Figure 1 Major Blemish Two Zone Screen Critical Zone center 25 Non Critical Zone 13 ...
Page 33: ...Installation 15 User s Guide 4 Video device or VCR 5 Output monitor ...
Page 49: ...42 ...
Page 50: ...43 ...
Page 51: ...8 Lamp Replacement 44 ...
Page 52: ...45 ...
Page 53: ...46 ...
Page 54: ...9 Shutdown 47 ...
Page 89: ...Chapter 6 Trouble Shooting 82 ...
Page 90: ...83 ...
Page 98: ...6 DMD Board Trouble Shooting Guide 91 ...
Page 99: ...92 ...
Page 100: ...Chapter 7 Schematics and Assy Drawing 93 ...
Page 104: ......
Page 105: ...Form No ACM0 0B 003 24 010918 ...
Page 106: ...Form No ACM0 0B 003 24 010918 ...
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