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14.5. P-Board Block Diagram
A
!
D451
D451
B
C
!
TO PF9
P9
NEUTRAL
NEUTRAL
1
LINE
LINE
4
D
E
TH-42PW6/TH-42PWD6
P-Board Block Diagram
1
L451
L451
Q451
Q452
IC451
Q454
Q453
3
3
8
8
6
6
4
4
POWER
POWER
FACTOR
FACTOR
CONTROL
CONTROL
P
P
Power Supply Board
Power Supply Board
HOT
COLD
RL401
TV ON/OFF
!
RL403
RUSH ON/OFF
5V
!
RL402
2
IC551
SUSTAIN VOLTAGE CONTROL
4
Vin
DRV.REG
=8.3V
START
O.V.P
REG
LATCH
T.S.D
O.S.C
-
-
+
+
Q455
Q457
Q456
Q651
Q650
IC552
PROCESS VOLTAGE CONTROL
4
Vin
DRV.REG
=8.3V
START
O.V.P
DRIVER
REG
LATCH
T.S.D
-
-
+
+
O.S.C
-
-
+
+
15V
!
D404
IC401
STANDBY
3
3
VOLTAGE
CONTROL
2
2
1
1
3
Drain
Drain
3
3
Rg2
Rg2
DRIVER
Rg1
Rg1
2
2
Source
Source
OCP/FB
OCP/FB
1
1
-
-
+
+
GND
GND
5
5
IC550
IC550
OUT
OUT
3
3
1
1
IN
IN
2
2
Drain
3
3
Rg2
Rg1
OCP/FB
1
1
2
2
Source
Source
GND
GND
5
5
17V
17V
13.5V
13.5V
380V
!
T501
10
10
9
9
7
7
6
6
4
4
70V
70V
2
2
1
1
!
D565
!
T502
1
1
2
2
3
3
4
4
7
7
8
8
9
9
HOT
C
D566
!
!
T401
8
8
7
7
6
6
4
4
3
3
2
2
1
1
D408
!
IC402
IC402
ERROR
ERROR
+
+
DETECT
DETECT
4
57
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