Canon LV-7105 Service Manual - Page 36
CIRCUIT PROTECTIONS, 1 Fuse, 2 Thermal Switch
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Part 2: Repair Information 2. CIRCUIT PROTECTIONS This projector is equipped with 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 The fuse is located inside of the projector. When either the LAMP indicator or the READY indicator is not illuminated, fuse may be opened. Check the fuse as following steps. It should be used the specified fuse as follows; Fuse Fuse Part No.: CY2-8376-000 TYPE T4.0AH 250V FUSE LITTEL FUSE INC. TYPE 215004 Screw Line Filter Cover Line Filter Board [How to replace the fuse] 1. Remove the cabinet top and main board following to "Mechanical Disassemblies". 2. Remove a screw and the line filter cover upward. 3. Remove the fuse from fuse holder. To install the fuse, take reversed step in the above. 2.2 Thermal Switch There is the thermal switch (SW902) inside of the projector to prevent the internal temperature from rising abnormally. When the internal temperature reaches near 100˚C, turn off the AC main power supply automatically. The thermal switch is not reset to normal automatically even if the internal temperature becomes normal. Reset the thermal switch following procedure. Check the resistance between terminals of thermal switch by using the tester. If it has high impedance, thermal switch may be in operative. Reset Button [How to reset the thermal switch] 1. Remove the cabinet top following to "Mechanical Disassemblies". 2. Press the reset button on the thermal switch. Fig. 2-1 Thermal switch (SW902) Fig. 2-2 CAUTION Before press the reset button, disconnect the AC cord from the projector. 2-2