■
To control the driving power of the cooling fans.
This projector detects internal temperature and automatically controls operating power of cooling fans.
The CPU checks the temperature and atmospheric pressure inside a projector. It checks a temperature using
temperature sensor-IC5801and it checks an atmospheric pressure using pressure sensor-IC4849.
The CPU controls the driving power of the cooling fans so the temperature inside the projector is maintained to
normal temperature.
■
To shut down the projector.
The CPU checks temperature of Blue polarized glass (PTH901) and inhalation air(IC5801). If each part temper-
ature reaches to abnormal temperature, the CPU will turn off a projector, and will blink WARNING TEMP. indi-
cator at intervals of 0.5 seconds. Cooling fans operate until temperature returns to normal. WARNING TEMP.
indicator will stop blink, if temperature returns to normal.
●
Temperature Monitor System
Main Board
A-side
Front side
B-side
Temp. Sensor
IC1519
Temp. Sensor
(Inhalation air)
IC5801
Pressure Sensor
IC4849
Temp. Sensor
(Blue polarized glass)
PTH901
Temperature sensors location
Blue polarizer unit
- 8 -
Circuit Protections
Содержание PLV-HD2000E
Страница 109: ... 109 IC Block Diagrams ICS1523M Clock Driver IC8209 CXA2151Q RGB Matrix IC271 ...
Страница 116: ... 116 75 88 88 88 88 73 74 76 60 59 65 64 66 90 67 66 62 91 Fig 89 Fig 90 Mechanical and Optical Parts ...
Страница 119: ... 119 114 115 102 103 114 119 118 117 125 121 113 112 122 Fig 95 Mirrors Fig 96 Lenses Mechanical and Optical Parts ...
Страница 166: ... 166 MEMO ...
Страница 167: ... 167 MEMO ...
Страница 168: ... PLV HD2000N E JUL 2006 BB 350 Printed in Japan SANYO Electric Co Ltd ...
Страница 194: ...A26 PCB_MA4A BGA side A FANNET_3 K16W MAIN K8L MAIN K401 MAIN K8K MAIN K2203 BGA side B ...
Страница 196: ...A28 PCB_MA4A ...
Страница 198: ...Diagrams Drawings MA4 HD2000N00 PA4 HD2000E00 ...