Specifications

Circuit Descriptions, List of Abbreviations, and IC Data Sheets

EN 76 L04.6HU CA9.

9.3 Supply Architecture

9.3.1 Block Diagram

Figure 9-3 Block diagram Power Supply

The L04.6 power management consists of two Switched Mode

Power Supplies (SMPS).

The Main SMPS delivers Vbat and Vaudio. The Aux SMPS

delivers 3.3V, 12V to derive Hercules and Tuner on the main

chassis, and also to provide the 3.3V, 6V and 10V supply to the

ATSC Module The Aux SMPS also gives out the

POWER_DOWN signal to the Hercules. This is an early

warning signal on power failure used to mute the sound and

EHT discharge.

The Hercules gives out STDBY_CON signal to the Main

SMPS. This is to enable the Main SMPS in normal operation,

and disable it during Stand-by. Figure above gives the block

diagram of the complete chassis power supply.

STBY_CON

This signal is generated by the Hercules. It is logic “Low” (0V)

under normal operation and in Semi Stand-by of the TV, and

High (3.3V) during Stand-by.

POWER_DOWN

This signal is generated by the Aux SMPS. It is logic “High”

(3V3) under normal operation of the TV and goes “Low” (0V)

when the AC Power input voltage of the supply goes below 70

Connector P701

1 Tx 3.3V TTL (RS232 Tx for Service port)

2GND GND

3 Rx 3.3V TTL (RS232 Rx for Service port)

F_15760_041.eps

161105

SWITCH

FILTER

MH COIL

RECTIF IER

RELAYDEGAUSS

MAINS SMPS

AUX SMPS

Vbatt ( To deflection )

-Vaudio

+Vaudio

+3.3V ( To Hercules)

+12V (To ATSC panel)

Stdby_Con (From Hercules)