Circuit Descriptions and List of Abbreviations
EN 90 FM249.
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.
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.
9.2 Power Supply Unit (Diagrams P)
9.2.1 Introduction
Figure 9-3 Power Supply
CL 26532038_008.eps
040402
Vs
Va
Vcc
Vrs
Vra
Vsk
Vak
Iak
Vsago
Vcego
Vpr2
+8V6
+8V6
+5V
+5V
+3V3
VSND_POS
GND_SND
VSND_NEG
+9V_STBY
+9V_STBY_SW
+5V_STBY_SW
+3V3_STBY_SW
POWER OK
STANDBY
SCL_1
SCAVIO
AUDIO
AMPLIFIER
PDP
SDA_1
DC_PROT
MAIN
SUPPLY
SEQUENCE
and
DISCHARGE
ON/OFF
SWITCH
MAINS
FILTERS
MAINS
IN
ON/OFF
CONTROL
MAINS
ISOLATION
STANDBY SUPPLY
FAN
CONTROL
Temp.
PROTECTION
PRECONDITIONER
(PFC)
MAINS
POWER
CONTROL
PSU
380V
SUPPLY_ON
FANS
(OPTIONAL)
www.freeservicemanuals.info
Digitized in Heiloo, Holland
To Next Page
Loading...
