14.3. PF-Board Block Diagram
+
L.F
L.F
-
+
+
+
OVP
Q
Vref
-
Soft
-
VOVP
Thermal
Vcc(start)
S
IF/B
+
R
GND
Q
comp
Detection
+
UVLO
Vcc
comp
Zero Current
Limit
F/B
Current
Limit
Z/C
drive
On Time Timer
+
R
On Dead Timer
D
Timer
comp
VUL
+
Stand-By
Peak
S
-
-
+
Restart
Latch-stop
Current
/Vcc(startup on)
UVLO
Vcc(startup off)
-
S
Startup
comp
Burst Peak
Startup
Shutdown
/Vcc(stop)
L.F
+
+
L.F
400V
DC187V
AC120V
R928
C971
R925
C974
LF904
1
2
3
4
CF902
CF901
R924
R901
L921
C924
R940
C921
D925
R934
C911
C970
RL901
S901
IC921
LF909
1
2
3
4
C910
C915
R975
C914
C926
F901
D920
R974
C922
C920
D922
R929
C925
C902
R904
C928
F902
K5D312BK0012
F900
R976
D970
C903
D926
R935
IC920
3
1
4
5
2
R927
R972
R973
LF911
1
2
3
4
C901
R971
C975
R970
D990
R990
R992
Q990
C990
C972
C973
D971
LF915
1
2
3
4
T920
2
S3
3
S4
5
S1A
7
S2A
8
S2B
10 V1
11 V2
14 P1
18 P2
6
S1B
T3.15AL 250V
HOT
COLD
HOT
COLD
HOT
COLD
HOT
COLD
HOT
IC970
ERROR
VOLTAGE
DET
POWER CONTROL
4
PF2
FEED BACK
1
1
4
PF1
LIVE
LIVE
TO P9
NEUTRAL
NEUTRAL
LIVE
T8AH 250V
K2AH3H000028
1
2
14V(UN Reg)
3
21V(UN Reg)
4
REF_2.5V
NEUTRAL
T8AH 250V
TO PA10
POWER ON/OFF CTL.
STAND-BY 5V
9
PF10
1
7
2
5
AC CORD
K2CG3DH00034
AC100V
GND
AC INLET
3
2
1
!
!
!
!
!
PF
Tuner Power Board
TH-42PX20U-P
PF-BOARD BLOCK Diagram
TH-42PX20U-P
PF-BOARD BLOCK Diagram
65
Summary of Contents for TH-42PX20U/P Operating
Page 9: ...6 2 Lead of Wiring 2 9 ...
Page 10: ...6 3 Lead of Wiring 3 10 ...
Page 11: ...6 4 Lead of Wiring 4 11 ...
Page 12: ...6 5 Lead of Wiring 5 12 ...
Page 34: ...15 2 Parts Location 2 34 ...
Page 35: ...15 3 Parts Location 3 35 ...
Page 36: ...36 ...
Page 37: ...15 4 Parts Location 4 15 5 Parts Location 5 37 ...
Page 38: ...38 ...
Page 42: ...17 2 Electrical Replacement Parts List 42 ...
Page 54: ...D12 K1KA07A00189 7P CONNECTOR 1 54 ...
Page 348: ...1 Applicable signals 4 TH 42PX20U P ...
Page 353: ...6 Location of Lead Wiring 6 1 Lead of Wiring 1 9 TH 42PX20U P ...
Page 354: ...6 2 Lead of Wiring 2 10 TH 42PX20U P ...
Page 355: ...6 3 Lead of Wiring 3 11 TH 42PX20U P ...
Page 356: ...6 4 Lead of Wiring 4 12 TH 42PX20U P ...
Page 357: ...6 5 Lead of Wiring 5 13 TH 42PX20U P ...
Page 358: ...6 6 Lead of Wiring 6 14 TH 42PX20U P ...
Page 367: ...9 4 IIC mode structure following items value is sample data 23 TH 42PX20U P ...
Page 376: ...32 TH 42PX20U P ...