-75-
●
Description of Motor driving circuit
Lamp Iris Motor and Lens Iris Motor
The lamp iris and the lens iris are equipped for the expansion
of visible contrast level. The operation of them is varied
according to "Image Level Selection" and their user menu.
Lamp Iris Motor
The lamp iris unit is located in the front of lamp. It is controlled
by the PWM signal, which is varied based upon the average
luminance level of the input image signal, from pin 269 of
IC301. When the image becomes darker, the lamp iris will be
closed, and when the image becomes brighter, it will be
opened.
Lens Iris Motor
The lens iris is located on the projection lens. It is controlled by
the IRIS_OPEN/CLOSE signals from pins 157 and 285 of
IC301. The IRIS_SENS signal from the potentiometer of the
lens iris unit is sent to pin 58 of IC301 and monitored the posi-
tion of the lens iris.
Door Motor
The projector provides 2 door switches. The door switch-A
(SW8801 on DOOR SW_A board) turns ON, when the slide
shutter is opened. The door switch-B (SW8811 on DOOR
SW_B board) turns ON, when the slide shutter is closed.
If the slide shutter is half-open or close, the lamp does not light.
When turning the projector on, the lamp starts light after
SW8801 turning on.
If the slide shutter error occurs during opertion, the POWER
indicator will blink orange and the projector will go to stand-by
mode after cooling.
LAMP IRIS UNIT
WINDOW
(variable)
MOTOR
●
Lamp iris unit
DOOR SW_B BOARD
DOOR SW_A BOARD
MOTOR
OPEN
CLOSE
●
Door motor
PROJECTION LENS
POTENTIOMETER
MOTOR
MOTOR LENS UNIT
CLOSE
(at dark image)
CENTER
OPEN
(at bright image)
●
Lens iris unit
Chassis Block Diagrams
WINDOW EXTENSION
Auto mode
APL of input signal
(OPEN)
(CLOSE)
WINDOW EXTENSION
Open mode
Close mode
APL of input signal
(OPEN)
(CLOSE)
Summary of Contents for PLV-Z4
Page 91: ... 91 SiI9011 HDMI Receiver IC8001 IC Block Diagrams ...
Page 112: ...M4W Z400 112 Mechanical and Optical Parts List 9 43 44 S5 S14 S12 S5 55 54 25 76 ...
Page 113: ...M4W Z400 113 Mechanical and Optical Parts List 1 12 5 46 45 61 51 47 49 ...
Page 115: ...M4W Z400 115 Mechanical and Optical Parts List 64 52 63 57 66 66 65 65 56 ...
Page 117: ...M4W Z400 117 Mechanical and Optical Parts List S7 S7 S10 S10 103 70 69 68 S7 S10 109 71 67 ...
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Page 124: ... M4WA Oct 2005 BB 400 Printed in Japan SANYO Electric Co Ltd ...
Page 138: ...Diagrams Drawings M4WA ...