![background image](http://html1.mh-extra.com/html/benq/mainstream-mp611/mainstream-mp611_product-service-manual_2734633139.webp)
139
Chapter 4 Cooling Circuit Operation Theory
4.1 Overview
The Projector cooling circuits consist of Fan driver devices, Fans, and Thermal sensors. The cooling purpose is for
protecting System Elements from over heat damage. Please see figure 8. The particular hot spot points are Lamp Tip,
Lamp Burner, DMD Heat-sink, and Lamp Box. There are three fans, blower fan, main fan 1, and main fan 2 for driving
airflow to cool down the system and hot spot point temperature.
Figure 10 Fan Control & DC/DC board BLOCK DIAGRAM
Fan Control & DC/DC Board
DC/DC
To PFC
board
REAR FAN
DRIVER
BLOWER FAN
DRIVER
To Main
board
B+
VCC
V12, VDD
2V5
To Main
board
To Rear
Fan
To Blower
Fan
To Ballast
board
To Thermal
Break/lamp
box sensor
LAMP
CONTROL
Summary of Contents for Mainstream MP611
Page 32: ...32 Figure 1 Major Blemish Two Zone Screen Non Critical Zone Critical Zone center 25 ...
Page 43: ...43 Packing ...
Page 44: ...44 ...
Page 61: ...61 Disassembly Assembly Exploded View ...
Page 62: ...62 ...
Page 63: ...63 ...
Page 64: ...64 Disassembly Assembly ...
Page 65: ...65 ...
Page 66: ...66 ...
Page 67: ...67 ...
Page 68: ...68 Level 1 Cosmetic Appearance Alignment Service Appearance ...
Page 69: ...69 ...
Page 70: ...70 ...
Page 71: ...71 ...
Page 78: ...78 Overfill adjustment As the picture below adjust light pipe to keep overfill image center ...
Page 84: ...84 ...
Page 90: ...90 Figure 4 6 Figure 4 9 ...
Page 91: ...91 ...
Page 92: ...92 ...
Page 99: ...99 BKT Link Lamp Shield CW Figure9 3 Figure9 4 ...
Page 104: ...104 3 Example ...
Page 105: ...105 10 Mechanical Assembly Concerns ...
Page 112: ...112 ...
Page 113: ...113 11 Power Assembly Concerns 1 Power board component add GP glue 1 1 CY604 CY605 add glue ...
Page 114: ...114 1 2 CY625 CY612 add glue ...
Page 115: ...115 ...
Page 116: ...116 1 3 C651 R651 add glue 2 SW2 solder by operator ...
Page 121: ...121 ...
Page 122: ...122 ...
Page 124: ...124 ...
Page 128: ...128 Chapter 3 Power Supply Trouble Shooting Guide 1 2 ...
Page 142: ...142 Bridge converts the AC input into DC output and the CAP is AC filter ...
Page 149: ...149 Circuit Schematics ...
Page 150: ...150 ...
Page 151: ...151 ...
Page 152: ...152 PCB Artwork ...
Page 153: ...153 ...
Page 154: ...154 ...
Page 155: ...155 ...
Page 156: ...156 ...
Page 157: ...157 ...
Page 158: ...158 ...
Page 159: ...159 ...
Page 160: ...160 ...
Page 168: ...168 ...