Read Panasonic PT-TW343RE (serv.man2) Service Manual online
-7-
Circuit Protections
Lamp cover switch
The lamp cover switch 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 assy, place the lamp cover
correctly otherwise the projector cannot turn on.
the lamp circuit when the lamp cover is removed or
not closed completely. After opening the lamp cover
for replacing the lamp assy, place the lamp cover
correctly otherwise the projector cannot turn on.
Thermal switch
There is a thermal switch inside of the projector to
detect the internal temperature rising abnormally.
When the internal temperature around lamp reaches
near 120°C, the thermal switch will open to cut off the
power supply to the lamp power circuit.
detect the internal temperature rising abnormally.
When the internal temperature around lamp reaches
near 120°C, the thermal switch will open to cut off the
power supply to the lamp power circuit.
The thermal switch is not reset to normal automatically
even if the internal temperature becomes normal. Reset
the thermal switch following to the procedure below.
even if the internal temperature becomes normal. Reset
the thermal switch following to the procedure below.
How to reset the thermal switch
1. Remove the cabinet top case.
2. Press the reset button on the thermal switch.
1. Remove the cabinet top case.
2. Press the reset button on the thermal switch.
Caution:
Before press the reset button, disconnect the AC cord
from the projector.
from the projector.
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.
inside the projector, it will automatically turn off by operating one of the following protection circuits.
Fuse
(F2003)
(F2003)
Fuse (F2003)
A fuse is located inside of the projector. When the
ON
(G)/STANDBY (R)
indicator is not lighting, the fuse may
be opened. Check the fuse as following steps.
The fuse should be used with the following type;
The fuse should be used with the following type;
Fuse Part No.: T2190011500
TYPE VBS UBM 6.3A 250V (PF) FUSE
CONQUER. TYPE VBS UBM
How to replace the fuse
1. The fuse is placed on the filter board. Remove
1. The fuse is placed on the filter board. Remove
the cabinet top following the "Mechanical
Disassembly". Remote the cabinet top following the
"Mechanical Disassembly".
Disassembly". Remote the cabinet top following the
"Mechanical Disassembly".
2. Take the fuse off from the fuse holder, and replace
the new one with the specified type.
Thermal fuse
Lamp cover switch
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