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14.3. P and PF-Board Block Diagram
D451
PF
Line Filter Board
PF1
F900
LINE
1
4
N
F901
LIVE CIRCUIT
AC CORD
TH-42PA20B/E
P and PF-Board Block Diagram
L451
Q451
Q452
IC451
Q454
Q453
3
8
6
4
POWER
FACTOR
CONTROL
P
Power Supply Board
PF2
LF904
LF909
LF915
LINE
2
1
2
1
9
8
L.F
L.F
L.F
N
3
4
3
4
3
10
HOT
Q455
Q456
RL401
P9
LINE
4
LINE
4
NEUTRAL
1
NEUTRAL
1
IC551
SUSTAIN VOLTAGE CONTROL
4
Vin
DRV.REG
=8.3V
START
O.V.P
DRIVER
REG
LATCH
T.S.D
O.S.C
-
+
Q457
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
TV ON/OFF
HOT
RL403
COLD
RUSH ON/OFF
5V
RL402
Drain
3
Rg2
Rg1
2
Source
OCP/FB
1
-
+
GND
5
IC55
OUT
3
IN
2
Drain
3
Rg2
Rg1
OCP/FB
1
2
Source
GND
5
D404
IC401
STANDBY
3
VOLTAGE
2
CONTROL
1
17V
13.5V
39
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