Inverter; Switch Unit; H Board - Sony KDL-32BX320 Service Training Manual

Main Supply: Once the power supply receives a power-on command
from the CPU on the A board, the main switching supply is turned
on to provide a regulated 12V source, a dedicated un-regulated 15V
for the audio circuits and an unregulated 24V source for the inverter
circuit.

INVERTER

The inverter receives the unregulated 24V from the power supply
board and generates the required high voltage AC to power the
backlight lamps. A control line to turn on the inverter (backlights on)
is used in conjunction with a dimmer control to vary the light level of
the CCFL lamps.
As of the writing of this manual, the inverter is not available as a
replacement part. The LCD panel assembly must be replaced.

SWITCH UNIT

This board contains the power, channel and volume up/down and
menu buttons.

H BOARD

The power, standby and timer LED's are located on this board along
with the IR remote receiver and light sensor.
KDL-32BX320/32BX321/32BX420/32BX421/40BX420/40BX421/46BX420/46BX421
SECTION 3 - CHASSIS OVERVIEW
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