Part 2: Repair Information
2-2
2. CIRCUIT PROTECTIONS
This projector provides the following circuit protections to operate in safety. If the
abnormality occurs inside the projector, it will automatically turn off by operating one of
the following protection circuits.
2.1 Fuse
A fuse is located inside of the projector. When the
POWER indicator is not lightning, the fuse may be
opened. Check the fuse as following steps.
The fuse should be used with the following type;
[Fuse replacing steps]
1. Remove the cabinet top and cabinet front following
to “Mechanical Disassemblies”.
2. Replace the new one with the specified type.
2.2 Thermal Switch
There is the thermal switch (SW902) inside of the
projector to detect the internal temperature rising
abnormally. When the internal temperature reaches
near 90˚C, it cuts off the AC main power supply.
The thermal switch cannot be reset itself
automatically even if the internal temperature
becomes normal. Reset the thermal switch following
to the below procedure.
[How to reset the thermal switch]
1. Insert the sharp tool like a screwdriver into a hole
on the cabinet bottom.
2. Press the reset button on the thermal switch 11
with the screwdriver.
2.3 Lamp Cover Switch
The lamp cover switch (SW901) cuts off the drive
signal to the lamp circuit when the lamp cover is
removed or not closed completely. After opening the
lamp cover for replacing the lamp ass’y, place the
lamp cover correctly otherwise the projector can not
turn on.
Fuse Part No. DY4-5918-000
TYPE T6.3AH 250V FUSE
Before press the reset button,
make sure that the AC cord
must be disconnected from the
AC outlet.
CAUTION
Fig. 2-1
Fig. 2-2
Fig. 2-3
Fuse
Thermal switch (SW902)
Lamp cover switch
Содержание LV-7215U
Страница 9: ...Part 1 General Information ...
Страница 25: ...Part 2 Repair Information ...
Страница 43: ...Part 3 Adjustment ...
Страница 66: ...Part 4 Troubleshooting ...
Страница 77: ...Part 4 Troubleshooting 4 11 4 IC BLOCK DIAGRAMS AD8075 Selector IC201 AN7513 Audio Output IC5601 ...
Страница 78: ...Part 4 Troubleshooting 4 12 AN5870 RGB SYNC SW IC1201 IC5201 BA7078 Sync Separator IC5341 ...
Страница 80: ...Part 4 Troubleshooting 4 14 CXD3536 LCD Driver IC401 FA5502 P F Control IC621 ...
Страница 81: ...Part 4 Troubleshooting 4 15 M62392 M62393 D A IC6271 IC281 ML60851 USB Driver IC9801 ...
Страница 82: ...Part 4 Troubleshooting 4 16 STR Z2156 Power Switching Control IC631 TB1274 Video Decoder IC3101 ...
Страница 83: ...Part 4 Troubleshooting 4 17 TC90A69F Y C Separator IC2101 ...
Страница 84: ...Part 5 Parts Catalog ...
Страница 85: ......
Страница 99: ...Part 6 Electrical Diagrams ...