Standby Power / Power On; Power On - Sony KZ-32TS1U Training Manual

Chapter 10 - Standby Power / Power ON
Standby Power
Standby power is present when:
•
The TV is plugged in.
•
The front panel ON/OFF switch is latched in.
•
The red standby light within the ON/OFF button is lit.
H1 BOARD
PWR SUPP.BD.
Circuit Operation
Refer to Figure 10-1. The standby power must be kick-started by a 6V pulse available when the TV is first
plugged into AC. The 6V pulse comes from regulator IC1 and passes through C16 into the standby power supply
circuit. Within the standby power supply is IC10 and T1. IC10 is an oscillator that starts and feeds small
transformer T1. T1 outputs standby 5Vdc to the Micro CPU (B board) and standby 3.3Vdc to the plasma panel.
Another T1 output (not shown) supplies voltage to the + end of C16 to keep the standby power supply ON after
the kick-start pulse had decayed. Therefore, the standby power supply starts and runs as long as the TV is
plugged into AC, regardless of the TV's Power ON switch position.

Power ON

Power ON can be initiated only after the front panel Power ON button has been pressed (S4101 closed on the Q
board), causing the red Standby light beneath this button to light (standby 5Vdc present). See figure 10-1. This
switch closure releases Micro CPU IC1004 (B board), permitting IC1004 to turn ON the TV.
Then the TV may be turned ON:
•
From the front panel by pressing the channel + or – buttons.
•
From the front panel by pressing the Power ON button twice.
•
From the remote by pressing the channel + or – buttons, or the individual channel numbers.
•
From the remote by pressing the Power ON button.
TV OFF
ON
T2,T4,T5
IC10
STANDBY
POWER
RY1
SURGE
IC11
RELAY
PS3
6V
IC1
REG. +
C16
10
FIGURE 10-1 - POWER ON
CN4100/CN3006
S4101
2
1
STBY
5V
1
3.3V
5,6
9,10 5V
T1
13
6V
15
13V
CN1/CN101
IC13
T4
PS1
T2
IC15
CN6/6
PS2
CN3005/5,8
IC21, IC22
CONTROL
28

10. Standby Power / Power ON

Q BOARD
CN3003/
CN1001
30 24
IC1004
ON
MAIN
5
6
CPU
CN
1203/
B BOARD
CN1
CN6
1
STBY
T2 6
3.3V
7-9
32"=78V
CN33
42"=82V
CN23
T5
1
54.5V
6
3.2V =TV ON
0V =TV OFF
8
1TVP13 1431
PLASMA
PANEL
CPU_GO
= 3.2V
RDP_GO
= 3.2V
STBY 3.3V
5V
Vs
VA
CN7
VSA
GO
VCE
GO
3/14/02