Philips FM24 Service Manual page 90

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EN 90 9.
The PSU consists of a pre-conditioner part and a DC/DC
converter part. This converter supplies power to the PDP high
voltages, the auxiliary voltages, and the audio amplifier. There
is a separate standby power supply, which supplies the Main
Processor, PDP microcontroller, interrupt generator and some
other circuits.
9.2 Power Supply Unit (Diagrams P)
9.2.1 Introduction
PSU
MAINS
IN
MAINS
FILTERS
FM24 Circuit Descriptions and List of Abbreviations
ON/OFF
SWITCH
PRECONDITIONER
(PFC)
380V
MAINS
POWER
CONTROL
STANDBY SUPPLY
MAINS
ISOLATION
Figure 9-3 Power Supply
The mains inlet module will host the inlet and filtering.
There is a functional 'Mains on/off' switch on the LED panel.
This switch is on the secondary side, controlling the relays on
the primary side.
MAIN
SUPPLY
SEQUENCE
and
DISCHARGE
PROTECTION
Temp.
ON/OFF
CONTROL
Digitized in Heiloo, Holland
Vs
Va
Vcc
Vrs
Vra
Vsk
Vak
PDP
Iak
Vsago
Vcego
Vpr2
+8V6
+5V
VSND_POS
GND_SND
VSND_NEG
AUDIO
AMPLIFIER
+9V_STBY
+9V_STBY_SW
+5V_STBY_SW
+3V3_STBY_SW
POWER OK
SCAVIO
STANDBY
SCL_1
SDA_1
+3V3
+5V
+8V6
DC_PROT
FAN FANS
CONTROL (OPTIONAL)
CL 26532038_008.eps
040402
31/8/2014