-6-
Circuit Protections
The projector will be automatically turned off when the internal temperature of the projector is abnormally high, or
the cooling fans stop spinning, or the power supplies in the projector are failed.
- If the WARNING indicator is flashing, it may detect the abnormal temperature inside the projector. Check the follow-
ing possible causes and wait until the WARNING indicator stops flashing, and then try to turn on the projector.
- If the WARNING indicator lights red, it may defect the cooling fans or power supply circuits. Check fans operation
and power supply lines referring to the chapter “Power supply & protection circuit” in the Chassis Block Diagram
section.
Possible causes
- Air filters are clogged with dust particles. Remove dust from the air filters by following instructions in the “Air filter
care and cleaning” below.
- Ventilation slots of the projector are blocked. In such an event, reposition the projector so that ventilation slots are
not obstructed.
- Check if projector is used at higher temperature place (Normal operating temperature is 5 to 5 ˚C or 41 to 95˚F)
the projector is shut down and the WArNING
indicator lights red.
When the projector detects an abnormal condition, it is auto-
matically shut down to protect the inside of the projector and
the WARNING indicator lights red. In this case, unplug the
AC power cord and reconnect it, and then turn the projector
on once again to verify operation. If the projector cannot be
turned on and the WARNING indicator still lights red, it may
defect the cooling fans or power supply circuits.
cAutIoN
DO NOT LEAVE THE PROJECTOR WITH THE AC
POWER CORD CONNECTED UNDER AN ABNOR-
MAL CONDITION. IT MAY RESULT IN FIRE OR
ELECTRIC SHOCK.
top control
WArNING
lights red
Warning temperature and power failure protection
Содержание LC-WB42N
Страница 67: ... 67 IC Block Diagrams FA7701 DDC Control IC7841 FA7703 Fan Power Control IC7811 Component2 ...
Страница 68: ... 68 IC Block Diagrams MP2106 DC DC Converter IC5721 IC8018 IC8019 FA5502 P F Control IC601 ...
Страница 70: ... 70 IC Block Diagrams L3E07111 LCD Driver Gamma Correction IC401 LM4889 Audio Output IC5031 ...
Страница 72: ... 72 IC Block Diagrams STR Z2156 Power OSC IC651 TE7783 Parallel I O Expander IC1802 ...
Страница 73: ... 73 IC Block Diagrams MP2307 DC DC Conventer IC5860 IC5842 ...
Страница 111: ...KY7 WB42N00 111 Mechanical Parts List 527 528 L14 L10 L03 L15 L07 L16 L13 L09 L06 L08 In the Optical Unit L11 L14 ...
Страница 113: ...KY7 WB42N00 113 Mechanical Parts List ...
Страница 114: ... KY7BC July 2009 Japan 2009 Eiki Internatinal Inc A key to better communications ...
Страница 132: ...A16 PCB_KY7AC NO DATA ...