Sony KZ-32TS1U Training Manual page 31

Circuit Operation
Once standby power is available to the Micro CPU IC1004 (B board), IC1004 can respond to either the channel
buttons or power ON button to turn ON the TV. Two commands are output IC1004 to turn ON the Plasma panel.
CPU_GO and RDP_GO both go high at CN1/pins 5 and 6.
The power ON path has to go through the plasma panel. After the panel has initialized, it will output two commands
to turn ON the remainder of the power supply and energize the surge relay. These commands are VSA_GO and
VCE_GO from CN 7/pins 6 and 8. When both of these two commands go HIGH, the power supply outputs the
remainder of the voltages and the TV turns ON. Within the power supply board, three separate regulated
supplies reside (PS1, PS2 and PS3). As shown in Figure 10-2. these power supplies feed output transformers
T4, T5 and T2, respectively. T4 outputs the Vs (sustain driver) voltage and T5 outputs the Va (address driver)
voltage for the plasma panel. The remainder of the TV voltages come from T2.
Power supply
power ON =
3.2Vdc from
Plasma panel
CN 7/pins 6, 8
VSA_GO
Control
CN 7/pin 6
IC21, IC22
----------------
VCE_GO
CN 7/pin 8
FIGURE 10-2 - POWER SUPPLY CONTROL CONCEPT
PS 1 (T4)
PS 2 (T5)
PS 3 (T2)
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10. Standby Power / Power ON
Vs
Va
TV Voltages
4/16/02