Power Supply; Switch Unit; Motion Sensor Board; Ir Board - Sony KDL-40CX525 Service Manual

POWER SUPPLY

There are different Power Supply Boards used in the models in this
manual. The type of board depends on the size of LCD panel. They
are:
G2A-Board (32")
G2B-Board (40")
G3-Board (46")
There are 2 distinct sections on the power supply:
Standby Supply: Continuously operational as long as AC power is
applied, the standby supply generates 3.3V for the circuits requiring
power while the unit is turned off. An unregulated 19V line is present
to provide power to the main relay, PFC and main power supply at
turn-on.
Main Supply: Once the power supply receives a power-on command
from the CPU on the Main Board, the main switching supply is turned
on to provide a regulated 12V source and an regulated 24V source
for the LED power supply circuits.

SWITCH UNIT

This board contains the power, channel, and volume up/down and
menu buttons.
KDL-32CX525/40CX525/46CX525
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MOTION SENSOR BOARD

Designated as the HMS3 Board, the Motion Sensor Board contains
the circuits for the Motion Sensor. The Motion Sensor detects when
there is movement in front of the TV. If there is no movement in front of
the TV after a predetermine amount of time the backlight is turned off
(audio present). After an extended period of time the TV is completely
turned off.

IR BOARD

Designated as the HLR2 Board, the IR Board contains the power,
standby, and timer LED's are located on this board along with the IR
remote receiver and light level sensor.

LCD PANEL ASSEMBLY

The LCD Panel Assembly includes the LCD Panel, TCON Board, and
the Inverter Board.
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polarizers. The liquid crystals are manipulated by the applied voltage
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the level of voltage applied.
The TCON performs all the control, timing, charge, and discharge
functions driving the operation of the LCD Panel.
TCON BOARD
The TCON Board communicates between the LCD Panel and the
microprocessor on the Main Board. (NOTE: The TCON Board is not
available as a replacement part for all models.)
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