Power-On Sequence - Sony KDS-R50XBR1 Training Manual

Power-ON Sequence

TVP-21
1
AC Power
Applied
2
Standby 5V - ON
AC Relay - OFF
TV Micro - Standby
IR Sensor – ON
PFC Circuit - ON
3
"ON" Command
Receicve
(TV Micro)
Green
4
(Power/Standby)LED
Flashes
5
"AC-RELAY" - HIGH
"REC-ON" - HIGH
AC Relay – ON
IC6401 SW9V – ON
Main Power Supply – ON
InRush Relay – ON
I2C Microprocessor
communications - Active
6
Green (Power/Standby)
LED Glows Steady
(Unit ON)
The AC power cord is plugged into the AC outlet and the
1
AC voltage passes through F-Board (Main Fuse OK) and
is applied to the G-Board.
The AC voltage supplied to the G-board is applied directly
2
to the AC-Relay and the Standby 5V power supply circuit.
The Standby 5V is applied to the TV Micro and places it
into standby mode. It also turns ON the IR sensor and
PFC circuit.
The TV-Microprocessor located on the DSU-Board
3
receives a ON command when either the ON /OFF button
is pressed on the remote or the TV front panel .
The Green (Power/Standby) LED on the TV front panel
4
begins flashing immediately after the ON command is
received and processed.
5 The Green (Power/Standby) LED continues flashing.
The TV microprocessor sends the "AC -RELAY" signal to
turn the AC Relay ON, and "REC-ON" signal, which is the
VCC for the SW9V Regulator IC6401.
The Main Power Supply IC6301 turns ON and all the
television operating voltages are developed.
Regulated 5V is fed back to turn ON the InRush Relay ,
which bypasses the InRush resistor.
Operational acknowledgments are sent and received over
the I2C bus between all microprocessors and other
devices such as the temperature sensor ICs .
After all the power supply voltages and microprocessor
6
communications have been successfully develop the
Green (Power/Standby) LED will glow steady.
The Power-ON sequence is completed.
3. Power Supply System
61